Motion promoting chair

Abstract

The present disclosure provides a motion promoting chair capable of inducing a pedaling motion with less torque (a low-power, lower-specification, and inexpensive motor). A movement promoting chair (10A) is provided with a chair main body (11), a seating part (12A), and a movable backrest part (14A) on which a user (13A) seated on the seating part leans. The movable backrest part is movable so as to induce a pedaling movement of the user seated on the seating part.

Description

Technical Field

[0001] This disclosure relates to a motion-promoting chair. Background Technology

[0002] There is a known technique that provides assistance to a user during a pedaling motion to initiate the pedaling motion (see, for example, Patent Document 1). Existing technical documents Patent documents

[0003] Patent Document 1: Japanese Patent Application Publication No. 2023-157545 Summary of the Invention The problem that the invention aims to solve

[0004] However, in Patent Document 1, although the movement of the pelvis can be promoted by moving the seat, there is a problem that since most of the weight of the person sitting is applied to the seat, a corresponding torque is required when moving the seat.

[0005] This disclosure was made to solve such a problem by providing a motion-promoting chair that can induce leg movements with less torque (low-power, lower-specification, and inexpensive motor). Technical means for solving problems

[0006] The exercise-enhancing chair disclosed herein comprises a chair body, a seat, and a movable backrest for a user to lean against while seated in the seat, the movable backrest being movable in a manner that induces a kicking motion in the user seated in the seat. With this configuration, an exercise-enhancing chair can be provided that induces kicking motion with less torque (low-power, lower-specification, and inexpensive motor). Invention Effects

[0007] According to this disclosure, a motion-enhancing chair can be provided that can induce leg-kicking movements with less torque (low-power, lower-specification, and inexpensive motor). Attached Figure Description

[0008] Figure 1 (a) is a side view of the bicycle-type lower limb exercise device 10A according to Embodiment 1, and (b) is a front view. Figure 2 (a) and (b) are diagrams showing the situation where the movable backrest 14A rotates relative to the body axis Z1. Figure 3 This is an example of support part 15A, mechanism 16A, etc. Figure 4 (a) is a side view of the bicycle-type lower limb exercise device 10B according to Embodiment 2, and (b) is a front view. Figure 5 (a) and (b) are examples of support 15B, mechanism 16B, etc. Figure 6 (a) is a side view of the bicycle-type lower limb exercise device 10C according to Embodiment 3, and (b) is a side view of the bicycle-type lower limb exercise device 10D according to Embodiment 4. Detailed Implementation

[0009] Hereinafter, a bicycle-type lower limb exercise device, which is an example of a movement-promoting chair according to the embodiments, will be described with reference to the accompanying drawings. The same reference numerals are used to denote corresponding components in each figure, and repeated descriptions are omitted.

[0010] The inventors have studied a method that induces foot-pushing motion by moving the backrest (the torso in contact with the backrest) instead of the seat as described in Patent Document 1.

[0011] The results showed that when the trunk is moved externally, the outcome varies depending on the type and point of movement, resulting in either facilitation with lower limb coordination or facilitation without lower limb coordination. This finding is explained below.

[0012] In other words, it is known that human body movements are individualized, and depending on this individuality, the joints that are emphasized in movement will differ (4-Posture Theory http: / / www.4stance.com / 4stance05.html). Hiroto, a proponent of the 4-Posture Theory, explains: "Human body movements are classified into four types. Everyone belongs to one of these types, and utilizing the characteristics of that type is related to maximizing one's abilities most naturally and effectively." He further explains that humans are divided into two types: those with their center of gravity on their toes (hereinafter: Type A) and those with their center of gravity on their heels (hereinafter: Type B). These are further divided into two types: those with their center of gravity on the inside (hereinafter: Type 1) and those with their center of gravity on the outside (hereinafter: Type 2), thus classifying them into four types: A1, A2, B1, and B2. Furthermore, he believes that the differences in movement fall into two categories: overlapping (A1, B2) and parallel (A2, B1) (see Reash Project, https: / / www.reash-project.net / aboutreash.html).

[0013] Based on the four-posture theory, the inventors categorized the types of movements and observed the movement patterns of several subjects, revealing the following trends: When lower limb movement is initiated by external movement of the lumbar or thoracic vertebrae (located above the pelvis), there are both smooth and unsmooth types. There are types where movement from the torso to the lower limbs is achieved through left-right tumbling movements of the torso (crossed movements), and types where movement from the torso to the lower limbs is achieved through forward-backward lateral rotation (parallel movements).

[0014] While observing the application of external forces by changing their location and direction, two types were identified: Type B, which tends to perceive external forces more strongly when applied near the ribs of the torso (causing the torso to move in response to the force), and Type A, which tends to perceive external forces more strongly when applied near the solar plexus rather than near the ribs. Type B involves coordinated movement of the torso and lower limbs, with the thoracic, lumbar, and hip joints acting as a unit, involving a swaying motion of the torso while simultaneously pushing off with the legs. Because the thoracic, lumbar, and hip joints move as a unit, applying an external force to the torso in the direction of the tumbling or lateral axis results in a coordinated movement of the torso, pelvis, and lower limbs, thus inducing lower limb movement. On the other hand, Type A's coordinated movement of the torso and lower limbs, centered on the solar plexus, results in a movement involving thoracic and lumbar spine-pelvic reversal. For example, an external force near the ribs in the direction of the tumbling axis → positive tumbling axis of the trunk (thoracic vertebrae) → negative tumbling axis of the lumbar vertebrae and pelvis → movement of the lower limbs (see "Health Improvement Through Seated Time_ROBOMEC2024.pdf"). When the thoracic vertebrae of the trunk are moved externally, only the thoracic vertebrae above the pit of the heart actively move (the force transmission is interrupted at the pit of the heart). The lumbar vertebrae and pelvis below the pit of the heart do not move much.

[0015] Next, embodiments one to four, which were completed based on the above-mentioned insights discovered by the inventors, will be described.

[0016] <Implementation Method 1> First, we will describe a bicycle-type lower limb exercise device, which is an example of a movement-promoting chair, according to Embodiment 1. Figure 1 (a) is a side view of the bicycle-type lower limb exercise device 10A according to Embodiment 1. Figure 1 (b) is the front view.

[0017] like Figure 1 of (a), Figure 1 As shown in (b), the bicycle-type lower limb exercise device 10A of Embodiment 1 is a lower limb exercise device actuated by a parallel type-B type trunk linkage. Figure 1 of (a), Figure 1As shown in (b), a pedaling machine 3 is disposed in front of the bicycle-type lower limb exercise device 10A. According to the bicycle-type lower limb exercise device 10A of Embodiment 1, the movable backrest 14A, as described later, induces pedaling motion (pedaling motion performed using the pedaling machine 3) of the user 13A sitting on the bicycle-type lower limb exercise device 10A (seat portion 12A). The pedaling machine 3 includes a pedal unit 7 and a machine body 8. The pedal unit 7 includes a shaft 10 rotatably supported on the machine body 8, a pair of cranks (not shown) connected to the shaft 10, and a pair of pedals 12 rotatably mounted on the pair of cranks. The user 13A sitting on the bicycle-type lower limb exercise device 10A (seat portion 12A) performs pedaling motion by alternately stepping forward with both feet placed on the pair of pedals 12. At this time, because the shaft 10 of the pedal movement machine 3 is connected to a reduction mechanism (not shown), a load is generated relative to the rotation of the pedal unit 7.

[0018] The bicycle-type lower limb exercise device 10A includes a chair body 11A, a seat 12A mounted on the chair body 11A, and a movable backrest 14A mounted on the chair body 11A. Hereinafter, for ease of explanation, the XYZ axes are defined. The X-axis extends along the front-to-back direction of the user 13A seated on the seat 12A. The Z-axis extends in the vertical direction. The Y-axis extends in a direction orthogonal to the XZ plane. Hereinafter, the X-axis and Z-axis may be referred to as the roll axis and yaw axis, respectively.

[0019] The movable backrest 14A is a part for the user 13A to lean against when seated in the seating area 12A. The movable backrest 14A is preferably tilted at an angle θ1 relative to the body axis Z1 (see reference). Figure 1 The backrest 13A is positioned in a state where it is in contact (face contact) with the back of the user 13A in state (a), and is tilted along the body axis Z1. Furthermore, the body axis Z1 is a straight line connecting the contact point between the user 13A and the movable backrest 14A relative to the user 13A's pelvis. The movable backrest 14A (backrest) is preferably tilted at an angle θ1 relative to the seat portion 12A (seat surface). The angle θ1 is between 100 and 130 degrees. The movable backrest 14A is movable in a manner that induces a leg-pushing movement by the user 13A leaning against it.

[0020] The inventors have discovered that by making the movable backrest 14A movable in the following manner, it is possible to induce a kicking motion in a parallel type-B user 13A. This will be explained below. First, as... Figure 2 As shown in (a), the movable backrest 14A rotates relative to the body axis Z1 (rotates along the yaw axis). Figure 2(a) indicates the case where the movable backrest 14A rotates relative to the body axis Z1. Furthermore, the period of the trunk's rotation around the Z-axis is required to match the period of the leg-pushing motion. With one leg-pushing motion per second, the trunk's rotation around the lateral axis also occurs once per second, resulting in a periodic movement returning to the same position. The rotation range is approximately 15 to 30 degrees. Thus, when the user 13A moves their right shoulder forward, their left shoulder moves backward. Similarly, when the user 13A moves their left shoulder forward, their right shoulder moves backward. This movement generates a torsional motion centered on the lateral axis of the user 13A's trunk. This trunk movement is a linked movement to the lower limb movements, causing the user 13A to recall lower limb movements. Furthermore, in addition to this movement, such as... Figure 2 As shown in (b), the movable backrest 14A is rotated relative to the X1 axis (roll axis rotation). Figure 2 (b) indicates the case where the movable backrest 14A rotates relative to the body axis Z1. Thus, when the lower limbs step out, it induces a movement of the pelvis around the tumbling axis, further stimulating the movement of the lower limbs. Furthermore, the period of the trunk's rotation around the X1 axis is required to be consistent with the period of the leg-pushing movement. With one leg-pushing movement per second, the trunk's rotation around the tumbling axis also occurs once per second, resulting in a periodic movement returning to the same position. Moreover, the range of rotation is approximately 5 to 10 degrees.

[0021] Furthermore, the body axis Z1 passes approximately at the center in the left-right direction of the movable backrest 14A (see reference). Figure 2 of (a), Figure 2 (b)). On the other hand, the X1 axis passes through approximately the center of the movable backrest 14A in the up, down, left, and right directions, and extends in a direction orthogonal to the body axis Z1 (see reference). Figure 2 of (a), Figure 2 (b) Furthermore, the inventors confirmed that by rotating the movable backrest 14A with a minimum relative to the body axis Z1, it is possible to induce a kicking motion in the user 13A of the parallel type-B type.

[0022] A mechanism 17A that enables the above-mentioned movement of the movable backrest 14A (an movement that can induce the user 13A to kick) is provided between the chair body 11A and the movable backrest 14A. As this mechanism 17A, for example, the mechanism described in Japanese Patent Application Publication No. 2020-039797 (see...) Figure 3According to the mechanism described in Japanese Patent Application Publication No. 2020-039797, a complex twisting motion (a figure-eight motion) is generated by the movable backrest 14A, thereby generating a torsional motion in the lateral axis direction of the user's 13A's torso. Specifically, when the front end of the movable backrest 14A swings to the right and its upper surface becomes lower left, the rear end swings to the left and its upper surface becomes upper right. Conversely, when the front end of the movable backrest 14A swings to the left and its upper surface becomes lower right, the rear end swings to the right and its upper surface becomes upper left. By repeating this action, the movable backrest 14A generates a complex twisting motion (a figure-eight motion), generating a torsional motion in the lateral axis direction of the user's 13A's torso, thereby inducing the user's 13A's leg-pushing motion.

[0023] Furthermore, as for mechanism 17A, it is not limited to the mechanism described in Japanese Patent Application Publication No. 2020-039797, but may use known mechanisms, such as the pelvic twister pstw1206, the mechanism used in STYLISH JAPAN, and the mechanism used in Ya-Man twisting riding device AYS41B.

[0024] In addition, such as Figure 3 As shown, the movable backrest 14A may also include a pair of left and right support portions 15A that support the torso of the user 13A seated on the seating portion 12A, and a mechanism 16A (a mechanism composed of a gear and rack) that drives the pair of left and right support portions 15A to press and hold the shoulders or ribs of the user 13A seated on the seating portion 12A from the left and right. In this case, the support portions 15A are preferably provided in a manner that allows the upper part of the torso (above the solar plexus) of the user 13A seated on the seating portion 12A to move as a unit with the pelvis. In addition, it is preferable that the solar plexus of the user 13A seated on the seating portion 12A moves freely without imposing any movement restrictions on the surrounding area. Figure 3 This is an example of support part 15A, mechanism 16A, etc. Furthermore, the configuration of Embodiment 1 is not limited to bicycle-type lower limb exercise equipment, but can also be applied to, for example, knee flexion and extension exercise equipment, and forward and backward sliding lower limb exercise equipment.

[0025] As explained above, according to Embodiment 1, a bicycle-type lower limb exercise device 10A can be provided that induces pedaling motion with less torque (low-power, lower-specification, and inexpensive motor) compared to the case where the seat surface moves. This is because the movable backrest 14A, which is less affected by the applied weight, is movable, rather than the seat surface, which is affected by most of the user's weight.

[0026] Furthermore, the function of this disclosure is as follows. That is, corresponding to the individuality of the body's movement pattern, as a joint, there are action points and stop points. The inventors have discovered that the point of force output (≈ the point of external force received) is the stop point. If the stop point is determined, the action point is also determined. In the movement that causes the body to move, the role of the joint is determined in the order of stop point → action point → stop point. In addition, it was discovered that the parts that become this role tend to be reversed for type A and type B. The stop point is the point where the user can be easily moved (induced) from the outside when it is moved from the outside. On the other hand, the action point is the point where the force dissipates even when it is moved from the outside, making it difficult to move (induced) the user. When the movement of the torso's action point is restricted, it moves as one with the stop part. In the type where the torso moves around the lateral axis, the action point (solar plexus) is pressed down in a suppressive manner by the left and right support members, and the torso is moved by applying force from the outside, and it moves as one with the torso. In this way, the force at the solar plexus is not dissipated and can be transmitted. When an external force is applied to the back of a chair to make it move, for type A, the movement of the body is transmitted by making the thoracic spine, lumbar spine, and pelvis a unified whole, with the solar plexus as the stopping point. The movable backrest has a support component that presses down on the ribs, and the support component has the function of maintaining contact from the ribs to the pelvis. The backrest moves as a whole with the thoracic spine, lumbar spine, and pelvis, so the movement of the backrest becomes the movement of the pelvis, and the force is easily transmitted. It is easy to convert the movement of the trunk into the movement of the lower limbs. Depending on the difference in the movement mode of the body, for the cross type it is an external force in the direction of the tumbling axis, and for the parallel type it is an external force in the direction of the lateral axis. By applying this force to make it move, it is easy to generate a coordinated movement of the trunk and lower limbs.

[0027] <Implementation Method Two> Next, we will describe a bicycle-type lower limb exercise device, which is an example of a movement-promoting chair, according to Embodiment 2. Figure 4 (a) is a side view of the bicycle-type lower limb exercise device 10B according to Embodiment 2. Figure 4 (b) is the front view.

[0028] like Figure 4 of (a), Figure 4 As shown in (b), the bicycle-type lower limb exercise device 10B of Embodiment 2 is a lower limb exercise device actuated by a cross-type-B type trunk linkage. Figure 4 of (a), Figure 4 As shown in (b), similar to Embodiment 1, a pedaling exercise machine 3 is arranged in front of the bicycle-type lower limb exercise device 10A. The pedaling exercise machine 3 has already been described, so its description is omitted.

[0029] The bicycle-type lower limb exercise device 10B includes a chair body 11B, a seat 12B mounted on the chair body 11B, and a movable backrest 14B mounted on the chair body 11B.

[0030] The movable backrest 14B is a part for the user 13B to lean against when seated in the seating area 12B. The movable backrest 14B is preferably tilted at an angle θ2 relative to the Z-axis (see reference). Figure 4 The user 13B is positioned in a state where the back of the user 13B (the back of the scapula) is in contact (face contact) with the back of the user 13B, and is supported by this backrest in a state of tilt along the body axis Z2. Furthermore, the body axis Z2 is a straight line connecting the contact point between the user 13B and the movable backrest 14B relative to the user 13B's pelvis. The movable backrest 14B is preferably tilted at an angle θ2 relative to the seat 12B (seat surface). The angle θ2 is between 100 and 130 degrees. The movable backrest 14B is movable in a manner that induces a leg-pushing movement by the user 13B leaning against it.

[0031] The inventors have discovered that by making the movable backrest 14B movable in the following manner, it is possible to induce a leg-pushing movement in a cross-type-B user 13B. Specifically, the movable backrest 14B slides back and forth along the Y-axis in a manner that induces a leg-pushing movement in the user 13B leaning against it. As the movable backrest 14B slides back and forth along the Y-axis, the torso of the user 13B leaning against it also slides back and forth along the Y-axis. This causes the body weight to shift to the ischium on the pushing side, inducing the leg-pushing movement. Furthermore, the cycle of the reciprocating sliding torso is required to be consistent with the cycle of the leg-pushing movement. In the case of one leg-pushing movement per second, the reciprocating sliding torso also returns to the same position once per second in a periodic motion. Furthermore, the sliding amount of the reciprocating motion is at least ±60 mm.

[0032] The mechanism (not shown) that enables the movement of the movable backrest 14B (an action that induces the user 13B to push off with their feet) is located between the chair body 11B and the movable backrest 14B. Although not shown, a known reciprocating sliding mechanism can be used as this mechanism. Furthermore, as... Figure 5 of (a), Figure 5As shown in (b), the movable backrest 14B may also include a pair of left and right support portions 15B that support the torso of the user 13B seated on the seating portion 12B, and a mechanism 16B that drives the pair of left and right support portions 15B to press and hold the shoulders or ribs of the user 13B seated on the seating portion 12B from the left and right. In this case, the support portions 15B preferably support the upper part of the torso (above the solar plexus) of the user 13B seated on the seating portion 12B in a manner that allows the pelvis to move as a unit. In addition, it is preferable that the solar plexus of the user 13B seated on the seating portion 12B moves freely without imposing any movement restrictions on the surrounding area. Figure 5 of (a), Figure 5 (b) is an example of the support part 15B, mechanism 16B, etc. Furthermore, the configuration of Embodiment 2 is not limited to bicycle-type lower limb exercise equipment, but can also be applied to, for example, knee flexion and extension exercise equipment, and forward and backward sliding lower limb exercise equipment.

[0033] As explained above, according to Embodiment 2, a bicycle-type lower limb exercise device 10B can be provided that induces pedaling motion with less torque (low-power, lower-specification, and inexpensive motor) compared to the case where the seat surface moves. This is because the movable backrest 14B, which has a smaller applied weight, is movable, rather than the seat surface, which has a large portion of the weight of the seated user 13B.

[0034] <Implementation Method 3> Next, we will describe a bicycle-type lower limb exercise device, which is an example of a movement-promoting chair, according to Embodiment 3. Figure 6 (a) is a side view of the bicycle-type lower limb exercise device 10C according to Embodiment 3.

[0035] like Figure 6 As shown in (a), the bicycle-type lower limb exercise device 10C of Embodiment 3 is a lower limb exercise device actuated by a parallel type-A type trunk linkage. Figure 6 As shown in (a), similar to Embodiment 1, a pedaling exercise machine 3 is arranged in front of the bicycle-type lower limb exercise device 10C. The pedaling exercise machine 3 has already been described, so its description is omitted.

[0036] The bicycle-type lower limb exercise device 10C includes a chair body 11C, a seat 12C mounted on the chair body 11C, and a movable backrest 14C mounted on the chair body 11C.

[0037] The movable backrest 14C is a part for the user 13C to lean against when seated in the seating area 12C. The movable backrest 14C is preferably tilted at an angle θ3 relative to the body axis Z3 (see reference). Figure 6In state (a), the user 13C is positioned such that the area near the dorsal side of the solar plexus is in contact (surface contact) with the area near the dorsal side of the solar plexus, and is supported in a configuration along axis AX1 parallel to the Z-axis (see reference). Figure 6 (a)). The movable backrest 14C (backrest) is, for example, vertically positioned relative to the seating portion 12C (seat surface).

[0038] The inventors have discovered that by making the movable backrest 14C as movable as the movable backrest 14A in Embodiment 1, it is possible to induce a leg-pushing movement in the user 13C of Parallel Type-A. This will be explained below. First, the movable backrest 14C is rotated relative to an axis AX1 parallel to the Z-axis (rotation along the lateral axis). Furthermore, the period of this rotation is required to be consistent with the period of the leg-pushing movement. With one leg-pushing movement per second, this rotation becomes a periodic action that returns to the same position once per second. Furthermore, the rotation range is approximately 15 to 30 degrees. Thus, when the user 13C moves their right shoulder forward, their left shoulder moves backward. Similarly, when the user 13C moves their left shoulder forward, their right shoulder moves backward. This action generates a torsional movement centered on the lateral axis of the user 13C's torso. This torso movement is a linkage to the torso movement during lower limb movements, causing the user 13C to recall lower limb movements. Furthermore, in addition to this movement, the movable backrest 14C rotates relative to an axis AX2 parallel to the X-axis (rolling axis rotation). This induces the pelvis to move around the rolling axis during the stepping motion of the lower limbs, further stimulating the lower limb movement. Moreover, the period of this rolling axis rotation is required to be consistent with the period of the leg-pushing motion. With one leg-pushing motion per second, this rotation becomes a periodic movement returning to the same position once per second. Furthermore, the rotation range is approximately 5 to 10 degrees.

[0039] Furthermore, axis AX1 passes approximately at the center of the movable backrest 14C in the left-right direction (see reference). Figure 2 of (a), Figure 2 (b)). On the other hand, axis AX2 passes through approximately the center of the movable backrest 14C in the up, down, left, and right directions, and extends in a direction orthogonal to axis AX1 (see reference). Figure 2 of (a), Figure 2 (b) Furthermore, the inventors have confirmed that by rotating the movable backrest 14C to a minimum relative to the axis AX1 parallel to the Z-axis, it is possible to induce a pedaling motion of the user 13C of the parallel type-A.

[0040] A mechanism 17C that enables the movement of the movable backrest 14C (an action that induces the user 13C to kick their legs) is provided between the chair body 11C and the movable backrest 14C. This mechanism 17C can be the same as the one described in Embodiment 1. Furthermore, although not shown, the movable backrest 14C can also be the same as the movable backrest 14A in Embodiment 1 (see...). Figure 2 Similarly, it includes a pair of left and right support parts that support the torso of the user 13C seated on the seating part 12C, and a mechanism (a gear and rack mechanism) that drives the pair of left and right support parts to press the user 13C's solar plexus in a concentric circle from the left and right and hold the torso in place. Furthermore, the configuration of Embodiment 3 is not limited to bicycle-type lower limb exercise equipment, but can also be applied to, for example, knee flexion and extension exercise equipment and forward and backward sliding lower limb exercise equipment.

[0041] As explained above, according to Embodiment 3, a bicycle-type lower limb exercise device 10C can be provided that induces pedaling motion with less torque (low-power, lower-specification, and inexpensive motor) compared to the case where the seat surface moves. This is because the movable backrest 14C, which has a smaller applied weight, is movable, rather than the seat surface, which has a large portion of the user's weight, being movable.

[0042] <Implementation Method Four> Next, we will describe a bicycle-type lower limb exercise device, which is an example of a movement-promoting chair, according to Embodiment 4. Figure 6 (b) is a side view of the bicycle-type lower limb exercise device 10D according to embodiment four.

[0043] like Figure 6 As shown in (b), the bicycle-type lower limb exercise device 10D of Embodiment 4 is a lower limb exercise device actuated by a cross-type-A type trunk linkage. Figure 6 As shown in (b), similar to Embodiment 1, a pedaling exercise machine 3 is arranged in front of the bicycle-type lower limb exercise device 10D. The pedaling exercise machine 3 has already been described, so its description is omitted.

[0044] The bicycle-type lower limb exercise device 10D includes a chair body 11D, a seat 12D mounted on the chair body 11D, and a movable backrest 14D mounted on the chair body 11D.

[0045] The movable backrest 14D is a part for the user 13D to lean against when seated in the seating area 12D. The movable backrest 14D is preferably tilted at an angle θ4 relative to the body axis Z4 (see reference). Figure 6In state (b), the user 13D's sternum is in contact (surface contact) with the dorsal side of the sternum, and is supported in a manner that is arranged along the axis AX1 parallel to the Z-axis (see reference). Figure 6 (b)). The movable backrest 14D (backrest) is set vertically relative to the seating part 12D (seat surface), for example.

[0046] The inventors discovered that by making the movable backrest 14D as movable as the movable backrest 14B in Embodiment 2, that is, by making the movable backrest 14D slide back and forth along the Y-axis, it is possible to induce a kicking motion in the user 13D of the cross-type-A type. As the movable backrest 14D slides back and forth along the Y-axis, the torso of the user 13D, which is leaning against the movable backrest 14D, also slides back and forth along the Y-axis. This causes the weight to shift to the ischium on the kicking side, inducing the kicking motion. Furthermore, the period of the back-sliding torso is required to be consistent with the period of the kicking motion. In the case of one kicking motion per second, the period of the back-sliding torso also becomes a periodic action of returning to the same position once per second. Furthermore, the sliding amount of the back-sliding motion is at least ±60 mm.

[0047] A mechanism 17D that enables the above-mentioned movement of the movable backrest 14D (the movement that induces the user 13D to push off with their feet) is provided between the chair body 11D and the movable backrest 14D. This mechanism 17D can be the same as the one described in Embodiment 2. Furthermore, although not shown, the movable backrest 14D can also be similar to the movable backrest 14B in Embodiment 3, having a pair of left and right support portions that support the torso of the user 13D seated on the seating portion 12D, and a mechanism (a gear and rack mechanism) that drives these left and right support portions to press the user 13D's solar plexus from the left and right sides and hold the torso. Furthermore, the configuration of Embodiment 4 is not limited to bicycle-type lower limb exercise equipment, but can also be applied to, for example, knee flexion and extension exercise equipment and forward and backward sliding lower limb exercise equipment.

[0048] As explained above, according to Embodiment 4, a bicycle-type lower limb exercise device 10D can be provided that induces pedaling motion with less torque (low-power, lower-specification, and inexpensive motor) compared to the case where the seat surface moves. This is because the movable backrest 14D, which is less affected by the applied weight, is movable, rather than the seat surface, which is affected by most of the user's weight.

[0049] Next, modified examples will be described. In the above embodiments, examples using a fixed seating part 12A, etc., have been described, but the method is not limited to this. For example, a movable seating part as described in Patent Document 1 can also be used.

[0050] The numerical values ​​shown in the above embodiments are all illustrative, and appropriate values ​​of different kinds may be used. The above embodiments are merely illustrative in all respects. The present invention is not to be limited by the description of the above embodiments. The present invention can be implemented in various other forms without departing from its spirit or essential characteristics. Explanation of reference numerals in the attached figures

[0051] 10A, 10B, 10C, 10D…Movement-promoting chair, 11A, 11B, 11C, 11D…Chair body, 12A, 12B, 12C, 12D…Seating section, 13A, 13B, 13C, 13D…User, 14A, 14B, 14C, 14D…Modible backrest, 15A, 15B, 15C, 15D…Support section, 16A, 16B, 16C, 16D…Mechanism.

Claims

1. A movement-promoting chair, comprising: chair body; Seating section; and A movable backrest allows the user seated in the seating area to lean against it. The movable backrest is movable in a manner that induces the user sitting on the seat to kick their legs.

2. The exercise-promoting chair according to claim 1, wherein, The movable backrest moves in a manner that allows the torso of the user, who is seated in the seating area and leaning against the movable backrest, to rotate around a horizontal axis.

3. The exercise-promoting chair according to claim 1, wherein, With the user's forward / backward direction in the seating area defined as the X-axis, the vertical direction as the Z-axis, and the axis orthogonal to the XZ plane defined as the Y-axis, The movable backrest slides back and forth along the Y-axis in a manner that induces the user sitting on the seat to push off with their feet.

4. The exercise-promoting chair according to claim 1, wherein, The movable backrest is configured such that when a user is seated in the seating area and leans against it, the back of the user's shoulder blade contacts the movable backrest.

5. The exercise-promoting chair according to claim 1, wherein, The movable backrest is configured such that when a user is seated in the seating area and leans against it, the area near the back of the user's solar plexus comes into contact with the movable backrest.

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