JPH11197266A - Health promotion device, chair, and spring device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a health promotion device which can provide cushioning action matching the weight of a user during bending and stretching exercises. SOLUTION: A spring device 2 is exerted with a force by which a torsion coil spring 41 is vertically opened between opposite upper and lower frames 11, 12 freely vertically movably connected together. One end of a tension spring 46 is engaged with a shaft 47 and can roll within a guide groove 51 provided in a bearing stand 50, to press the mid part of the arm part 41 a of the torsion coil spring 41 to adjust the force of opening the torsion coil spring 41. The other end of the tension spring 46 is engaged with a threaded bar 48 having an adjustment knob 53. When an exercising person gets on the upper frame 11, the upper frame 11 is lowered up to a stroke S according to his weight, and during bending and stretching exercises, the upper frame 11 is moved up and down about the stroke S. By adjusting this movement with the adjustment knob 53, cushioning action matching the weight of the user can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a health-promoting device for improving health by performing bending and stretching exercises and the like, and a spring device used for a health-promoting device, a chair and the like.

[0002]

2. Description of the Related Art First, a structure of a spring device (seat suspension) used for a driving seat of a construction machine is shown in FIG.
Will be described.

In FIG. 10, (1) is a chair on which a driver sits, (2) is a spring device called a seat suspension, and (3) is a base for fixing a lower portion of the spring device (2). The spring device (2) is configured to expand and contract according to the weight of the driver sitting on the chair (1).
In this figure, considering a case where a driver weighing W is seated on a chair (1), the spring device (2) contracts by S and balances its drag P.

On the other hand, although the weight W of the driver varies widely, it is necessary to keep the dimension S substantially constant in accordance with the weight of the driver in order to improve the ride comfort of the driver. Therefore, it is necessary to adjust the initial drag P according to the weight of the driver. Further, the spring device (2) is required to absorb the vibration from the base (3).

FIG. 11 shows an example of the structure of a conventional spring device. FIG. 11 shows a compression coil spring (13) between the upper frame (11) of the spring device (2) mounted on the chair (1) and its lower frame (12) mounted on the base (3) of FIG.
Are mounted, and the upper frame (11) and the lower frame (12) are connected by links (14) and (15) arranged in an X-shape so that the distance therebetween can be changed.

That is, one end of the link (14) is connected to the upper frame (11).
A roller (18) is rotatably mounted on the shaft via a shaft (16), and a roller (18) is rotatably mounted on the other end so as to be rotatable around the shaft (17) and movable on the lower surface of the lower frame (12). .
Similarly to the link (14), one end of the link (15) is attached to the lower frame (12) via a shaft (19), and the other end is provided with a roller (21) via a shaft (20). It is mounted so as to be movable on the upper surface of (11).

[0007] Also, (22) is the two links (14) and (1).
(5) a shaft rotatably connected to the center of (5);
(24) is a stopper for the rollers (18) and (21) for determining the upper limit dimension H of the floating position of the upper frame (11) by the spring (13). Reference numeral (25) denotes a spring receiver for the spring (13), which is configured to be movable up and down by a screw (26) fixed to the upper frame (11) and a nut (27) paired with the screw (26). The initial drag P can be adjusted according to the weight W of the driver sitting on the chair (1).

However, in this method, the adjustment allowance a of the initial drag P according to the contact height of the spring (13) and the weight W of the driver is a.
Therefore, there is a disadvantage that the maximum amount of contraction Sm inherent in the spring device cannot be obtained. Incidentally, Sm is calculated from the above H (A
+ B), and A and B are the upper frames (1
1) The height of the frame portion determined by the structure and strength of the lower frame (12).

As described above, the direct receiving compression coil spring system of FIG. 11 for directly receiving the weight W of the driver sitting on the chair is as follows.
A drag force P proportional to the amount of contraction S of the spring device is obtained, which is an acceptable characteristic for the spring device. However, this method uses an initial drag force P according to the contact height of the spring (13) and the weight W of the driver. Due to the adjustment allowance a, there is a disadvantage that it is difficult to obtain the maximum contraction amount Sm inherent in the spring device.

In other words, the maximum contraction amount Sm is limited by the close contact height of the spring (13) and the maximum value of the adjustment allowance a of the initial drag P. Also, although omitted above,
This method has a disadvantage that an adjusting device for making the adjustment of the initial drag P easier for the driver is complicated.

FIG. 12 is an improvement of the spring device of FIG. 11, which is intended to be used in the present invention described later. FIG. 12 shows an example in which a lever (31) and a tension coil spring (32) for giving a rotational moment to the lever are used instead of the compression coil spring (13) in FIG.
Since the X-shaped link relationship is the same as that in FIG. 11, it is not shown.

In FIG. 12, one end of a lever (31) is rotatably mounted on an upper frame (11) via a shaft (33), and a roller (35) is mounted on the other end via a shaft (34). The lower surface of the lower frame (12) is mounted so that it can roll. One end of a spring (32) is engaged with the lever (31) at a position near the middle / upper frame (11), and the other end of the spring (32) is paired with a nut (36). It is engaged with a threaded rod (37) for adjusting the tension of the spring (32).

In this state, a clockwise rotational moment is applied to the lever (31) by the tension of the spring (32), and this is a drag acting on the contact point between the roller (35) and the lower frame (12). This balances with the counterclockwise rotational moment caused by P, and the following equation is satisfied if friction and the like are ignored and simply considered. That is, Ps × b = P × c P = (b / c) × Ps −−−− Ps = (c / b) × P −−−−− P is almost equivalent to the weight W of the driver. .

Here, Ps: tension of spring (32) = K × δ K: spring constant of spring (32) δ: deflection of spring (32) b: axis (33) parallel to the axis of spring (32) Vertical distance from a line passing through the center of the roller P: drag acting on the contact part normal of the roller (35) c: axis (33) parallel to the contact part normal of the roller (35)
Vertical distance from a line passing through the center of

[0015]

SUMMARY OF THE INVENTION An object of the present invention is to provide a health promotion device constituted by using a spring device shown in FIG. It is another object of the present invention to obtain a spring device that is superior to the spring device of FIG. 12, and to obtain a chair and a health promotion device that are configured using the superior spring device.

[0016]

[Means for Solving the Problems]

(1) The health promotion device according to the present invention includes an upper frame and a lower frame that are movably connected in the vertical direction, a spring that exerts a force in a direction in which the frames are separated, and a force that the spring acts on. A spring device constituted by adjusting means for adjusting the movement of the person, so that a person who exercises can perform up and down movements such as bending and stretching movements on the upper frame, and when performing this movement, the adjusting means according to the weight of the person Thereby, the acting force of the spring can be adjusted.

(2) Further, in the above (1), an up-down counter for detecting the up-down movement of the upper frame accompanying the up-down movement and counting the number of movements is provided.

(3) In the above (1) or (2), a stroke in which the upper frame moves downward when a target weight is applied to the upper frame by adjusting the acting force of the spring by the adjusting means. Is set so as to be a predetermined stroke, and when the exercising person gets on the upper frame, the stroke at that time is detected, and information on the weight is obtained according to a comparison between the detected stroke and the set stroke. Is provided.

(4) The spring device according to the present invention comprises an upper frame and a lower frame which are movably connected in the vertical direction, a torsion coil spring which exerts a force in a direction in which the frames are separated, and a torsion coil. A spring mechanism is provided for applying an acting force to an intermediate portion of the arm portion of the coil spring, and adjusting a force acting in a direction in which the torsion coil spring opens the upper frame.

(5) In the spring device of (4), an adjusting means for adjusting the acting force of the spring mechanism is provided.

(6) A chair using the spring device of (4) or (5).

(7) Health promotion device 100 according to the present invention
Is a device using the spring device of (5) instead of the spring device of any one of (1) to (3).

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view used as a health promotion device. In FIG. 1, (8
1) is a human, and (100) is a health promotion device.
2 corresponds to a spring device (2) shown in FIG. 2, and illustrates an upper frame (11), a lower frame (12), and a weight adjustment knob (101). The upper frame (11) is used as a step so that the exercising person may move up and down such as bending and stretching. The weight adjustment knob (101) corresponds to the screw bar (37) in FIG. 12, and is a knob with a memory for weight adjustment.

If the weight adjustment knob (101) is adjusted according to the weight of the person (81) riding on the health promotion device (100), the upper frame (11) will be lowered by the dimension S as already described. It is as follows. In this state, if a person applies a recoil and bends and stretches the knee, the upper frame (11) moves up and down around the dimension S, thereby improving health.

FIG. 2 is a diagram showing a measurement circuit portion in the health promotion device (100). In FIG. 2, reference numeral (82) denotes a sensor for detecting the position of the upper frame (11).
The output is increased according to the stroke of 1). This sensor may have an iron core inserted into the induction coil, for example. Further, a plurality of proximity switches may be arranged and detected, and a rotary encoder or the like may be used. When the switch (83) is in contact with the contact point a and the human (81) bends and extends, a waveform is detected by the vertical movement of the upper frame (11), and this waveform is pulse-shaped by a waveform shaping circuit (84). And the number of times is measured by an operation counter (85) which is a counter.

When a person (81) rides with the switch (83) in contact with the contact point (b), the stroke increases according to the weight of the person (81), and the output level of the sensor (82) increases. The discriminating circuit (86) displays, for example, "You worked hard", "Let's lose a little more weight", "You lost too much", etc. according to the level (large, medium, small in the figure). Or output by voice.

FIG. 3 shows the operating characteristics of the health promotion device, showing the relationship between the load W and the stroke S, and the target weight being expressed as parameters A, B, C and D. By turning the weight adjustment knob 101, the tension spring (3
By adjusting the initial drag P of 2), A, B, C,
The characteristic corresponding to the target weight of 70, 60, 50, and 40 kg corresponding to D can be obtained. That is, when the user sets his / her target weight by turning the weight adjustment knob 101 and gets on the health promotion device, the measurement circuit shown in FIG. 2 measures and displays whether or not the stroke is within the acceptable range of the target weight. Container (8
It is displayed in 7).

For example, if a person weighing 70 kg has a target weight 70
If it is kg, adjust to the scale of 70 shown in the straight line A and ride on the health promotion device (100), it will be within the acceptable range, but if this person has to reach the target weight of 60 kg,
Adjusting to the 60 scale shown by the straight line B, the health promotion device (10
If it goes to 0), it will be out of the acceptable range. These results are shown in FIG.
Is measured and displayed by the measurement circuit. The result can thus be obtained very easily.

The thus constructed device can be used as follows, and is expected to greatly contribute to the promotion of human health. The S dimension of the health promotion device (100) is set in advance, and the sensor (82) operates according to the lowering size of the upper frame (11) due to the weight on the device as shown in FIG. In addition, display or sound such as "You did your best" or "Let's lose a little more weight". Also, the descending dimension of the upper frame (11) due to the weight of the person riding on this device is S
If below, "OK", S by the action of the sensor (82)
If the size is exceeded, a "NO" signal may be issued.

When a person sets the weight adjustment knob (101) to his / her target weight and stands on the apparatus, it is easy to know whether the target has been achieved.

If a person stands on this device and applies a recoil to bend and stretch his knees, it is expected to contribute to health promotion such as training of the legs and hips, and also to contribute to the diet of the person. In addition, since the number of repetitions can be displayed by the measurement circuit of FIG. 2, it is expected that the user will be interested and work to improve health.

When your weight reaches the primary target,
The weight adjustment knob (101) can be reset to challenge the next goal. At this time, bending and stretching exercises will help to reduce weight.

Embodiment 2 FIG. This embodiment uses an improved spring device of the present invention instead of the spring device of FIG. 12 used in the first embodiment.
Now, this spring device will be described.

In the spring device shown in FIG. 12, the dimension b in the above equation (P = (b / c) × Ps) is determined by rotating the lever (31) in order to effectively utilize the maximum contraction amount Sm of the spring device. Limited by the angle and the outer diameter of the spring (32). On the other hand, the dimension c increases as the rotation angle of the lever (31) increases. For this reason, b / c <1. From the sine characteristic, as the rotation angle of the lever (31), that is, the contraction amount S of the spring device increases, the rate of increase of b / c decreases, and the spring (3)
Assuming that the tension Ps in (2) is constant, the rate of increase of P / Ps also decreases, making it difficult to obtain desirable cushion characteristics in consideration of vibration and impact.

To cope with this, the tension Ps (= K × δ) of the spring (32) corresponding to the contraction amount S is increased.

However, this method takes into account that the amount of deflection δ of the spring (32) is restricted in relation to the dimension b, and K is set as the spring constant of the spring (32), Not only must be increased according to the equation, but also the magnitude of Ps must be increased by P / c, that is, c / b times the weight W of the human being. ) Has the disadvantage of having to be powerful.

As described above, in the spring device shown in FIG.
Since the lever type is such that the weight W of the human is indirectly received via the lever (31), the axis of the spring (32) that applies a rotational moment to the lever (31) is substantially aligned with the moving direction of the spring device. Since the spring is arranged vertically, the amount of expansion and contraction of the spring itself does not directly affect the maximum amount of shrinkage Sm, but the position (dimension b in FIG. 12) on the lever (31) which engages the spring and the outside of the spring The maximum value of the diameter dimension is limited to a dimension that does not interfere with the structure when the spring device moves by the maximum contraction amount Sm.

In this limited space, the spring (3
As described above, the tension Ps of 2) is changed to P, ie, c of the human weight W.
There is a disadvantage that it must be / b times stronger. In addition, there is a disadvantage that a considerable amount of labor is required for a human to set the initial drag P according to his / her weight W by using such a large spring. Embodiment 2 of the present invention provides a spring device that overcomes the above-mentioned disadvantages.

FIG. 4 is a vertical sectional side view of a spring device using a torsion coil spring according to the second embodiment, and the illustration of the X-shaped link is omitted because it is the same as that of the prior art FIG. Components having the same functions as those described above are denoted by the same reference numerals, and description thereof will be omitted unless otherwise required.

In FIG. 4, (41) is a torsion coil spring, and hook portions (41c, 41d) are formed at the tips of both arm portions (41a, 41b). However, although this hook portion is not shown, it may be manufactured as a separate component and joined to the tip of the arm portion of the torsion coil spring, and the shape is not restricted.

One end (41c) of the hook is a pin (42).
The pin (42) is rotatably mounted on the upper frame (11).
Is mounted on a pin support (43) fixed to the base. The other end (41d) of the hook portion is rotatably mounted on a pin (44), and the pin (44) is mounted on a pin support (45) fixed to the lower frame (12).

A tension spring (46) has one end engaged with the shaft (47) and the other end engaged with one end of the threaded rod (48). A roller (49) is rotatably mounted on the shaft (47), and the roller (49) is configured to be in contact with the arm (41a) of the torsion coil spring and roll on the arm. The shaft (47) is configured to be able to roll in a guide groove (51) provided in the bearing stand (50), and the bearing stand (50) is fixed to the upper frame (11). .

Reference numeral (52) denotes a guide for the threaded rod (48), which is fixed to the upper frame (11), and the other end of the threaded rod (48) is formed with a threaded portion (48a). Also, this screw (4
8a) meshes with the knob (53) for adjusting the initial drag P according to the weight of the human, and the rotation of the knob (53) causes the screw rod (48) to move in and out of the knob (53),
As a result, the tension spring (46) expands and contracts.

The chain line in FIG. 4 shows a state in which the upper frame (11) is lowered by the dimension S. In this state, the pin (42)
Also descends to the position of the chain line, and the torsion coil spring (4
1) is twisted by the angle (θ ₀ −θ), and the torsional moment increases. Also, the upper frame (1
The lowering of 1) causes the shaft (47) to move along the guide groove (51) to the right in the figure by (x-x ₀ ), and the tension spring (46) is extended by that amount. This will increase the tension.

By the way, the above-mentioned θ ₀ is equal to the both arms (41a.
41b) is the initial angle between both arms shown in the figure formed by 41b), and θ is the angle between both arms shown in the figure when the upper frame (11) is lowered by S.

X ₀ is the initial center distance between the pin (42) and the roller (49) as shown in the figure under the initial conditions, and x is the pin shown in the figure when the upper frame (11) is lowered by S. This is the center distance between (42) and the roller (49).
L is the center distance between the coil part of the spring (41) and the pin (42), and the contact point between the roller (49) and the arm part (41a) of the torsion coil spring has a tension of the tension spring (46). This is the point of application of the force to the arm (41a).

Next, the relationship between the acting force and the weight W of the human and the drag P thereof will be described with reference to FIG. FIG.
Is a state in which the upper frame (11) is lowered by an arbitrary size S. If friction of the mechanism is ignored, the following equation is statically established.

That is, M = Pa × L + Pc (L−x) −−−−−−−−− Pa = {M−Pc (L−x)} / L −−−−−−−− W = P = (Pa + Pc) × COS α = [(M + Pc × x) / L] × COS α From the following equation, W = P = [(K1 × φ + K2 × δ × η × x) / L] × COS α−−.

However, each symbol is as follows. M = torsion coil spring (41) has its torsion angle φ
Torsion moment = K1 × φφ = torsion angle of torsion coil spring (41) K1 = spring constant of torsion coil spring (41) Pa = force perpendicular to its arm (41a) by a torsion coil spring acting on pin (42). Pc = force perpendicular to the arm (41a) of the torsion coil spring acting on the contact point of the roller (49), and given as a component from the tension Pb of the tension spring (46). Pb = tension of the tension spring (46) = K2 × δ L = center distance between the coil portion of the torsion coil spring and the pin (42). x = the vertical distance between the center of the pin (42) and the normal at the point of application of the roller (49). α = moving line (ZZ) of upper frame (11) and Pa
Angle with the line on which K2 = spring constant of the tension spring (46). δ = the amount of deflection of the tension spring (46)

Η = Pc / Pb Force ratio, where Pc is given as a normal component force applied by the tension Pb of the tension spring (46) to each of the contact points of the roller (49) and its concentric shaft (47). That is, this force Pc is related to the normal direction at the point of application of the shaft (47), and varies depending on the shape of the guide groove (51) of the shaft (47).

The equation accurately expresses the drag characteristic of the present invention constructed as described above. The drag P is not only the torsion moment Pa due to the torsion coil spring, but also the Pa and the tension spring. Component force P by tension Pb
It is given as the value obtained by multiplying the sum with c by COS α.

Pc is Pc = η × Pb, and η
Varies depending on the shape of the guide groove (51) of the shaft (47) as described above, and its value can be made larger than "1". That is, in FIG. 12 of the prior art, the tension Ps of the tension spring (32) had to be c / b times higher than the drag P, but in the present invention, the drag P was considered even if only Pc was considered.
A smaller tension Pb of the tension spring is sufficient. Also, by changing the shape of the guide groove (51) of the shaft (47),
It has the feature that it is possible to obtain desirable drag characteristics in consideration of vibration and impact.

The equation also means that the drag P changes by positively changing x. That is, the upper frame (1
The roller (49) moves the guide groove (5) by the movement of the roller (49).
1) Apart from moving on the top, although not shown, by moving the guide groove itself, that is, the bearing base (50),
It is also possible to change the drag P.

Next, assuming that a human having a weight W1 rides on the spring device, the upper frame (11) is lowered by a dimension S1 commensurate with the weight and is balanced with the drag P1. At this time, the descending dimension S1 is not limited to the above φ, but also x · δ
And all of them effectively form the drag P1. The value of η is determined by setting the shape of the guide groove (51) in consideration of the size of S1 and the cushioning property at that position.

Next, assuming that a person weighing W2, which is heavier than W1, rides on the spring device, it is assumed that the upper frame (11) is lowered by a dimension S2 commensurate with the weight and is balanced with the drag P2. In order to make the dimension S2 at this time almost the same as S1,
The initial tension Pb may be increased by turning the knob (53) to increase the amount of deflection of the tension spring (46). This means that (K2 × δ) increases in the equation.

Moreover, since the tension of the tension spring (46) can be reduced to a fraction of that of the tension spring (32) in FIG. 12, the force for turning the knob (53) is also reduced accordingly. Has the advantage of being easy for humans to operate.

In the above description, W is simply treated as the weight of a person, but a chair may be mounted on the spring device and a person may be seated on the chair. In addition, an object that requires buffering of a device such as a control device other than the chair can also be placed.

If there is a fixed object such as a human and a chair,
Assuming that the weight of the fixed object is W0, the upper frame (11) is actually
Is the sum of these, i.e., (W + W0), but there is no problem if the description and equations given so far are assumed to be W = (W + W0). For simplicity of the following description, W includes W0 unless otherwise specified.

Next, considering the case where the upper frame (11) of the spring device configured as in this embodiment is lowered by the maximum contraction amount Sm, the hook portion (4) of the torsion coil spring is used.
1c, 41d) are shifted to the near side and the far side of the sheet of FIG.
The coil portion of the tension spring (46) and the coil portion of the torsion coil spring (41) will fit in the space formed by the dimensions A and B determined by the structure and strength of the upper frame (11) and the lower frame (12).

That is, the configuration according to this embodiment makes it possible to manufacture a spring device having excellent performance without restricting Sm under the no-load height H given by the user as a relatively small dimension. Is what you do.

As described above, this embodiment 2
It is a configuration in which a torsion coil spring mounted between opposing frames movably connected to each other and a tension spring for applying an acting force to an intermediate portion of an arm of the torsion coil spring are skillfully combined, and have the following features. .

(1) The reaction force P of the human body weight W is given by the sum of the force acting on the arm tip of the torsion coil spring and the component force of the tension spring acting on the intermediate point of application of the arm of the torsion coil spring. . The tension spring is stretched as the upper frame of the device is lowered, increasing the force on the torsion coil spring arm midpoint.

When the tension spring has a movable force point, the force component of the tension spring changes depending on the shape of the moving groove, and the component force can be made larger than the tension force of the tension spring itself. is there. For this reason, the tension spring requires a relatively small capacity. Further, since the axis of the coil portion of the torsion coil spring and the tension spring is disposed substantially perpendicular to the moving direction between the opposing frames, the entire device can be downsized.

(2) The dimension between the opposing frames, that is, the characteristic of the relationship between the amount of lowering of the upper frame and the drag can be nonlinear or approximate linear depending on the shape of the groove for moving the point of application. Desirable drag characteristics can be obtained in consideration of vibration and impact.

(3) Since the required tension of the tension spring is relatively small, the tension, that is, the rotational force of the drag adjustment knob is also reduced, which facilitates the operation.

(4) In addition to adjusting the tension of the tension spring, if it is configured so that the point of application of the arm of the tension spring and the torsion coil spring can be moved, the position within the preset range can be set at any dimensional position between the frames. Drag adjustment is possible. Further, it is also possible to configure so that the initial size at the time of no load between the frames is changed.

In this description, the adjusting knob (53)
And the screw portion (48a) are provided to adjust the initial drag P according to the weight of the human. However, when the applied load W is constant, the tension spring (4) is not provided without these adjusting devices.
A spring device in which one end of 6) is fixed may be used.

Embodiment 3 This embodiment uses the spring device of the second embodiment as a health promotion device. Its configuration is the same as that of FIG.
As 0, the spring device 2 shown in FIG. 4 is used. The description of the operation is omitted since it has been described in the first embodiment. The features of the third embodiment have all the features of the spring device of the second embodiment.

Embodiment 4 FIG. 6 shows an embodiment in which the spring device shown in the second embodiment is incorporated in an ordinary chair itself, which can be manufactured so that it can be adjusted to a comfortable position according to the weight. . In addition, the height of the chair at no load H
It is also possible to adjust a, and FIG. 7 shows this relationship.

FIG. 6 shows an embodiment in which the spring device (2) shown in FIG. 4 of the second embodiment is mounted on the lower surface of the chair (1), and the upper frame (11) is fixed to the lower surface of the chair. Frame (1
In 2), a plurality of feet (91) can be attached according to the purpose of use. Reference numeral (92) denotes a safety cover in which the periphery between the upper and lower frames (11 and 12) is connected so as to be stretchable.

FIG. 7 shows an embodiment in which the position of the stopper (24) of the roller (21) shown in FIG. 11 is movable, and the stopper (24) is provided with its moving bracket (9).
It is configured as a part of 3). A screw hole (94) is formed in the other part of the moving bracket (93), and the screw portion (95a) of the bolt (95) is configured to mesh with the screw hole. The bolt (95) is attached to the upper frame (11).
It is rotatably mounted with a retaining pin (97) via a washer (96).

It will be explained that if the moving device of the stopper (24) thus constructed is mounted on, for example, the portion (E) shown in FIG. 6 and the bolt (95) is turned, the height Ha of the chair at no load changes. It is clear from That is, if the stopper (24) is moved rightward in the figure, the link (15) turns clockwise to reduce Ha, and if the stopper (24) is moved leftward in the figure, the link (15) is moved. ) Turns counterclockwise to rise and Ha increases.

According to the equation, increasing Ha increases the torsion angle φ and reduces the torsional moment of the torsion coil spring (41). If the amount of deflection is increased to increase the tension of the tension spring (46), the drag P will increase. On the other hand, reducing Ha decreases the torsional moment of the torsion coil spring (41), but the amount of δ is reduced as necessary and the tension of the tension spring (46) is reduced. Then, the drag P will decrease.

In other words, this device has a no-load height Ha of the chair.
Can be easily changed, and at each of the changed positions, a comfortable cushioning property corresponding to the weight of the seated person can be obtained. The no-load height adjusting means can be attached to the spring device of the health promotion device according to the third embodiment as necessary.

Embodiment 5 FIG. 8 is a view showing another configuration of the spring device of the present invention, which is obtained by partially changing FIG. 4 of the second embodiment. Next, this figure will be described.

The major difference between FIG. 8 and FIG. 4 is that the guide groove (51) of the roller (49) for rolling on the bearing stand (50), that is, the torsion coil spring arm (41a) provided on the bearing stand (50) in FIG. And a lever (61) is provided instead. (62) is the rotation axis of the lever (61), (63)
Is a roller mounted on the rotating shaft (62) and in contact with the tip of the torsion coil spring arm (41a); (64) is mounted on a shaft (65) provided at one end of the lever (61), and The roller is in contact with the intermediate portion of (41a).

The lever (61) is formed in a triangular shape as shown in the figure. A pin (66) is provided at the other apex, and one end of a tension spring (46) is connected to the pin. The tension Pb of the tension spring (46) is equal to the force P corresponding to the lever ratio.
c is provided to an intermediate portion of the torsion coil spring arm (41a).

(67) is a mandrel inserted into the coil portion of the torsion coil spring (41), (68) and (69) are links for positioning the mandrel (67), and one end of these links is a pin (70). The other end of the link (68) is connected to the rotating shaft (62), and the other end of the link (69) is connected to the shaft (45) provided on the lower frame pin receiving base (45). 71) is rotatably joined. (72) is a roller mounted on the shaft (71), and is a roller for receiving the tip of the torsion coil spring arm (41b).

In FIG. 8, the mandrel (67) and the links (68) and (69) are used to hold the torsion coil spring (41). However, as shown in FIG. The tip of the arm of the spring (41) may be bent and held as a hook (41c, 41d).

In FIG. 8, the rotation axis (62) of the lever (61) is shown to coincide with the rotation axis of the roller (63) in contact with the tip of the torsion coil spring arm 41a. The rotation axis of the lever (61) does not have to be coincident, and can be set at an arbitrary position in consideration of the load characteristic given by the equation. This is shown in FIG. FIG. 9 shows a configuration in which the rotation axis (62a) of the lever (61) is provided at a position different from that of the rotation axis (62) of the roller (63). Correspondingly, it rotates about the rotation axis (62a). Therefore, the center distance x between the roller (63) and the roller (64) mounted on the lever (61) is equal to the angle θ.
Will change correspondingly.

As described above, in the fifth embodiment, as shown in FIG. 8, the dimension L in the equation slightly changes depending on the arm angle θ of the twist coil spring, but the dimension x is substantially constant. It is possible to obtain a load characteristic close to the linear shape. That is, a characteristic curve as shown in FIG. 3 can be easily obtained.
Further, as shown in FIG. 9, the rotation shaft (62) of the lever (61)
If the position of a) is shifted from the position of the rotation axis (62) of the roller (63), x changes depending on the angle θ, and the non-linear load characteristic is easily obtained. Further, the guide groove (51) shown in FIG.
And the bearing stand (50) forming the groove (51) can be eliminated. Further, a friction noise may be generated due to friction in the groove portion, but this can be prevented.

[0081]

(1) As described above, according to the health promotion device of the present invention, since the spring device that adjusts the acting force of the spring according to its own weight is used, the stroke position suitable for its own weight is used. This allows up and down movements such as bending and stretching movements.

(2) Also, since the number of up and down movements such as bending and stretching movements is measured, an exerciser can easily grasp the progress of the movement.

(3) In addition, since the weight of the person exercising is compared with the target weight, health management for the weight can be easily performed.

(4) According to the spring device of the present invention, an approximate linear or non-linear load characteristic is obtained by a combination of a torsion coil spring and a spring mechanism for applying an acting force to an intermediate portion of the arm of the torsion coil spring. Therefore, a spring device having a buffering action corresponding to the applied load can be easily obtained.

(5) Further, since the adjusting means for adjusting the acting force of the spring mechanism is provided, the initial drag of the device can be changed, and a spring device having a buffering action corresponding to various loads can be easily obtained.

(6) According to the chair of the present invention, since the spring device of (4) or (5) is used, it is possible to obtain a chair having a buffering action corresponding to the weight of the occupant.

(7) According to the health promotion device of the present invention,
Since the health promotion device using the spring device of the above (5) is used, it is possible to perform a vertical motion such as a bending and stretching motion at a stroke position suitable for the user's weight.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of a health promotion device according to Embodiment 1 of the present invention.

FIG. 2 is a configuration diagram of a measurement circuit of the health promotion device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing operating characteristics of the health promotion device according to the first embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a spring device according to a second embodiment of the present invention.

FIG. 5 is a diagram showing a balance between a load and a drag of a spring device according to a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a chair according to Embodiment 4 of the present invention.

FIG. 7 is a stroke adjusting mechanism of FIG. 6;

FIG. 8 is a longitudinal sectional view of a spring device according to Embodiment 5 of the present invention.

FIG. 9 is a longitudinal sectional view of another spring device according to Embodiment 5 of the present invention.

FIG. 10 is a view showing the principle of a conventional spring device for a chair.

FIG. 11 is a longitudinal sectional view of a conventional spring device.

FIG. 12 is a longitudinal sectional view of a conventional spring device having a load adjusting mechanism.

[Explanation of symbols]

2 Spring device 11 Upper frame 12 Lower frame 14, 15 Link 41 Torsion coil spring 41a, 41b
Arm 46 Tension spring 47 Shaft 48 Screw rod 49 Roller 50 Bearing base 51 Guide groove 53 Adjustment knob 61 Lever 82 Sensor 83 Switch 87 Indicator 93 Moving bracket 95 Bolt 100 Health promotion device 101 Weight adjustment knob

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16F 15/067 G01G 19/52 F G01G 19/52 F16F 15/06 B

Claims (7)

[Claims] An upper frame and a lower frame movably connected in a vertical direction, a spring for applying a force in a direction for separating the frames, and an adjusting means for adjusting the force of the spring. The exerciser is provided with a spring device that allows the exercising person to perform up and down movements such as bending and stretching movements on the upper frame, and when performing this movement, adjusts the acting force of the spring by the adjusting means according to the weight of the person. A health promotion device characterized by being able to do. 2. The health promotion device according to claim 1, further comprising an operation counter for detecting an up-down movement of the upper frame accompanying the up-down movement and counting the number of movements. 3. A stroke for moving the upper frame downward when the target weight is applied to the upper frame by adjusting the acting force of the spring by the adjusting means. Is set to be a predetermined stroke, and when the exercising person gets on the upper frame, the stroke at that time is detected, and information on the weight is obtained according to a comparison between the detected stroke and the set stroke. A health promotion device provided with a comparison means for outputting a signal. 4. An opposing upper frame and lower frame movably connected in a vertical direction, a torsion coil spring for applying a force in a direction for separating the frames, and an intermediate portion between the arms of the torsion coil spring. A spring device, comprising: a spring mechanism for applying an acting force and adjusting a force acting in a direction in which the torsion coil spring opens the upper frame. 5. The spring device according to claim 4, further comprising adjusting means for adjusting the acting force of the spring mechanism. 6. A chair using the spring device according to claim 4. 7. A health promotion device using the spring device according to claim 5 in place of the spring device according to any one of claims 1 to 3.