JP3974343B2 - Abdominal rocker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an abdomen swinging tool useful for health promotion by swinging a user's abdomen.
[0002]
[Prior art and problems to be solved by the invention]
As shown in FIGS. 9A and 9B, there is known an abdomen swinging device in which a device base a is provided with a footrest c that is driven by an electric motor b and reciprocates left and right. As shown in FIG. 5B, the user's ankle that is supine on the floor is placed on the footrest c, so that the lower part from the waist around the user's waist is left and right. Shake gently. As a result, the abdomen and legs that are not normally used are forcibly exercised, and the body is tightened to improve health.
[0003]
By the way, the abdomen swinging tool shown in FIG. 9 has a footrest c attached to the upper end of a swinging arm e whose lower end is pivotally supported by a pivot d (see, for example, Japanese Utility Model Publication No. 44-26505). . A vertical groove f extending vertically is formed in the swing arm e, and a crank pin j provided at a position separated from the rotation center of the worm wheel g driven to rotate by the electric motor b fits into the vertical groove f. . Thereby, when the worm wheel g is rotationally driven by the electric motor b, the footrest c is reciprocally swung left and right.
[0004]
However, in this case, the load acting from the footrest c is substantially supported only by the pivot axis d. Therefore, the swinging arm e swings in a direction B (shown in FIG. 9B) perpendicular to the swinging direction A when the footrest c is swung back and forth due to the offset load received from the leg of the user. As a result, there is a problem that the smooth reciprocation of the footrest c cannot be secured. In order to reduce such runout, it is conceivable to reduce the backlash between the drive shaft d and the swing arm e. However, this method requires high machining accuracy and is inferior in productivity. Also, since a large bending moment acts on the pivot axis d, a high strength that can withstand this is also required to maintain durability.
[0005]
It is also known that the footrest c is reciprocated horizontally instead of swinging left and right (see, for example, Registered Utility Model Publication No. 3010074). However, in this case, when the footrest is positioned at the left and right reciprocating ends, the height of both feet placed on the footrest is the same even though the torsion of the waist is maximized. It is easy to feel a sense of discomfort in the legs or waist, and improvements have been desired for some time. There is no such disadvantage when the footrest swings back and forth.
[0006]
The present invention has been devised in view of the above-described problems. The apparatus main body is placed on the floor, and the lower end side is pivotally supported by the apparatus main body by a pivot and the upper end portion is pivoted. The swing arm is provided with a swing arm provided with a footrest on which a foot of a user who is supine can be placed, and a drive unit that swings the swing arm back and forth. An object of the present invention is to provide an abdomen swinging tool capable of realizing a smooth swinging and reciprocating motion of a footrest on the basis of providing a steady rest that prevents swinging in a direction perpendicular to the reciprocating swinging direction.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention includes a device main body placed on the floor surface, and a user's foot that is pivotally supported on the device main body by a pivot on the lower end side and is supine on the upper end portion. An abdomen swinging tool comprising a swinging arm provided with a footrest on which a swinging platform can be mounted, and a drive unit that swings the swinging arm back and forth to the left and right. A guide groove having an arcuate surface that is substantially concentric with the lower arc, and is fixed to the apparatus main body side and extends substantially parallel to the pivot, penetrates the guide groove , and extends into the upper arcuate surface. is composed of a support which abuts, and between said foot load platform and the pivot, characterized in that it comprises a stop shake preventing vibration of the reciprocating swinging direction at right angles with the direction of the swing arm It is said.
[0008]
The invention of claim 2, wherein the device body has a mounting plate having a falling-up piece rising substantially vertically with mounted on the bottom plate of the main portion, the support, the head of the large-diameter consists shaft that connecting the shaft portion of the small diameter, a belly rocking device according to claim 1, wherein the nut is screwed at one end with penetrating in the start-Chi-up piece.
[0009]
According to a third aspect of the present invention, the steady rest includes a slidable contact portion that is disposed on both sides of the swing arm and prevents the swing by slidingly contacting a front surface and a rear surface of the swing arm. The abdomen rocking device according to claim 1 or 2, wherein the abdomen rocking device is characterized.
[0010]
The invention according to claim 4 is the abdomen swinging tool according to claim 1 or 2, wherein the support body includes a roller that contacts the arc surface of the guide groove.
[0011]
According to a fifth aspect of the present invention, the support body includes a roller that contacts the arc surface of the guide groove, and the guide groove includes a flange portion that contacts the side surface of the roller and prevents the deflection. The abdomen rocking tool according to claim 1 or 2.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 is an overall perspective view of the abdomen swinging tool 1 of the present embodiment, FIG. 2 is a side view showing an example of the usage state, FIGS. 3A and 3B are plan views, and FIG. FIG. 5 and FIG. 6 are cross-sectional views of the whole perspective view showing the internal mechanism after removal.
[0015]
As shown in the figure, the abdomen swinging tool 1 of the present embodiment is pivotally supported so that the apparatus main body 2 placed on a flat floor surface F and the lower end side can be swung on the apparatus main body 2 by a pivot 3. And a swing arm 5 provided with a footrest 4 on which a user's foot lying on the upper end can be placed, and a drive unit 6 for swinging the swing arm 5 back and forth. As shown in FIG. 1, the abdomen rocking tool 1 of this example is covered with a cover K except for the footrest 4 and a controller C is attached. The controller C is provided with a switch S that can set an operation time in addition to starting and stopping the abdomen swinging tool 1, for example. Note that “placed on the floor” only needs to be placed on the floor, and includes, for example, those placed on the bed.
[0016]
In this example, the apparatus main body 2 includes a bottom plate-shaped main portion 2a extending along the floor surface F and a substantially L-shaped mounting plate 2b attached to the main portion 2a. The main portion 2a is made of, for example, a resin molded product, and is reinforced by an appropriate rib 15, and a support portion 16 that supports the horizontal piece 2b1 of the mounting plate 2b by floating from the bottom surface 2a1 is formed at a substantially central portion thereof. .
[0017]
In this example, the mounting plate 2b is composed of a horizontal piece 2b1 extending substantially horizontally and a rising piece 2b2 which is bent from the horizontal piece 2b and rises substantially vertically, and is formed, for example, by bending a plate-like metal material. The horizontal piece 2b1 of the mounting plate 2b is integrally fixed to the support portion 16 of the main portion 2a with a screw or the like. A circular opening 17 is formed in the rising piece 2b2. The rising piece 2b2 has a hanging portion that hangs down beyond the horizontal piece 2b1 at the lower end of the central portion thereof.
[0018]
In this example, the swing arm 5 is formed of a vertically long plate-like body formed of a hard resin, and is formed to have an end narrow shape toward the lower end portion, for example. As shown in FIG. 5, a shaft hole 5 </ b> A that penetrates the swing arm 5 forward and backward is formed at the lower end of the swing arm 5. The pivot 3 is inserted into the shaft hole 5A via a collar 20 with a flange.
[0019]
In this example, the pivot 3 is composed of a stepped shaft body having a large diameter portion 3a having a large diameter and small diameter portions 3b and 3c formed on both sides in the axial direction and having a diameter smaller than the large diameter portion 3a. Show things. Screw portions (not shown) are formed at the respective ends of the small diameter portions 3b and 3c on both sides. The large-diameter portion 3a of the pivot 3 is disposed between the swing arm 5 and the rising piece 2b2, and one small-diameter portion 3b passes through the swing arm 5 and is screwed onto the nut 21. The other small diameter portion 3c penetrates the rising piece 2b2 and is screwed with a nut 22 via a washer or the like. As a result, the swing arm 5 is pivotally supported by the apparatus main body 2 via the collar 20 so as to be swingable about the axis of the pivot shaft 3. The swing arm 5 can be restricted from moving in the axial direction by the flange 20 </ b> A of the collar 20 and the large-diameter portion 3 a of the pivot 3.
[0020]
Further, the swing arm 5 is formed with a vertical groove 5B extending vertically. Although the vertical groove 5B of this example does not penetrate the swing arm 5, it is not limited to this. Further, the roller cam 11 of the drive unit 6 is fitted in the vertical groove 5B, and the swing arm 5 is swung around the pivot 3.
[0021]
In this example, the drive unit 6 includes an electric motor M, a reduction gear G attached to an output shaft (not shown) of the electric motor M, an arm body 9 fixed to the output shaft of the reduction gear G, and the arm body 9. The mounting shaft 10 is mounted with a center at a position separated from the shaft center of the output shaft Ga of the speed reducer, and is rotatably mounted on the mounting shaft 10 and in the vertical groove 5B of the swing arm 5. The thing comprised from the roller cam 11 inserted was illustrated.
[0022]
The electric motor M and the speed reducer G are arranged on the opposite side of the rising piece 2b2 from the swing arm 5. The reduction gear G is composed of, for example, a gear reduction gear, and is fixed to the horizontal piece 2b1 of the mounting plate 2b via a bracket 19. The electric motor M can be, for example, a two-pole motor, a four-pole motor, or various other types, and is attached to the speed reducer G integrally. The outer diameter of the roller cam 11 is substantially the same as or slightly smaller than the groove width of the vertical groove 5B. The arm body 9 and the roller cam 11 can be linked to the swing arm 5 through the opening 17 provided in the rising piece 2b2.
[0023]
In such a drive unit 6, when the electric motor M is rotationally driven, the output shaft Ga of the reduction gear G rotates the arm body 9, and the roller cam 11 inserted into the vertical groove 5 </ b> B of the swing arm 5 is The swing arm 5 can be swung back and forth by pressing the left and right groove wall surfaces of the vertical groove 5B. The drive unit 6 is not limited to the above-described configuration, and the arm body 9 and the roller cam 11 may be replaced with one eccentric cam fixed to the output shaft Ga of the speed reducer. A member having a slide groove can be provided on the output shaft Ga side, and a cam or the like can be provided on the swing arm 5 side so as to fit in the groove and be eccentric from the output shaft Ga of the speed reducer. . Thus, the drive unit 6 can include all mechanisms that can swing the reciprocating arm 5 back and forth.
[0024]
As shown in FIG. 1, the swing arm 5 protrudes from the opening O provided in the cover K to the outside of the case, and the footrest 4 is fixed to the upper end of the swing arm 5 by screws or the like.
[0025]
As shown in FIG. 2 and FIG. 3, the footrest 4 is configured in a shape that can place the ankle portion of the user who is supine. The footrest 4 of this example has concave upper surfaces on both sides of the central portion 4A so that the user's ankle can be held smoothly without being easily removed even when the footrest 4 reciprocates left and right. Although the concave portion 4B is formed, it can be appropriately modified.
[0026]
As shown in FIG. 2, the abdomen swinging tool 1 swings the leg part left and right like a pendulum, with the user's waist lying on the floor as a fulcrum. In addition, as the legs move, the upper and lower body swing around the buttocks or waist to draw a left and right character, stimulating the muscles of the abdomen and hips, tightening the body and improving health. If necessary, a turntable-like rotating disk (not shown) can be used in combination between the waist and the floor surface in order to reduce friction.
[0027]
The abdomen swinging tool 1 of the present invention is perpendicular to the reciprocating swinging direction A of the swinging arm 5 between the footrest 4 and the pivot 3, more preferably between the case K and the pivot 3. One of the features is to provide a steady rest 7 for preventing the swing in the direction B.
[0028]
For example, as shown in FIGS. 5 and 6, the steady rest 7 has upper and lower arcuate surfaces 12 a and 12 b formed on the swing arm 5 and along arcs Ra and Rb substantially concentric with the pivot 3. And a support body 13 provided on the apparatus main body 2 side and extending substantially in parallel with the pivot 3 and preventing the deflection by contacting the arc surface 12a or 12b.
[0029]
In this example, the guide groove 12 is formed between the vertical groove 5B and the footrest 4, more specifically between the vertical groove 5B and the cover K, and has a circular arc angle or more at which the swing arm 5 swings. With a length of Further, in the present example, the support body 13 is composed of a shaft body in which a small-diameter shaft portion 13b is connected to a large-diameter head portion 13a. The shaft portion 13b penetrates both the guide groove 12 and the rising piece 2b2 of the swing arm 5, and a nut 23 is screwed to one end thereof. The outer diameter of the shaft portion 13 b is formed slightly smaller than the groove width of the guide groove 12. Specifically, it is desirable to set it as small as about 0.5 to 2.0 mm (note that the thickness of the swing arm 5 is about 20 mm).
[0030]
When a load that causes a swing in the direction indicated by symbol B in FIG. 5 is applied to the footrest 4, in the abdomen swinging tool in which the steady rest 7 is not provided, the pivot 3 and the swinging arm 5 are not aligned. A large deflection in the direction B occurs in the swing arm 5 within a range allowed by the rattling. For this reason, the reciprocating rocking | fluctuation of the rocking | fluctuating arm 5 cannot be performed smoothly, but an unpleasant feeling is felt at the time of use. At this time, a large bending moment acts on the pivot 3.
[0031]
On the other hand, in the abdominal part swinging tool 1 provided with the steady rest 7 as in this embodiment, when the swinging arm 5 is shaken, the arc surface 12a or 12b of the guide groove 12 is the shaft part 13b of the support shaft 13. Can be substantially prevented by limiting the deflection to a small range. In addition, at this time, the arcuate surfaces 12 a and 12 b are concentric with the pivot 3, so that smooth swinging is ensured while being guided by the support 13. Further, since the load in the direction B and the vertical load are partially supported by the steady rest 7, the bending moment acting on the pivot 3 can be reduced. As described above, the steady rest 7 of this example can constitute a load support portion that carries a load acting on the swing arm 5 from the footrest 4. The smooth reciprocating motion of the apparatus can be ensured and the usability can be improved, the durability of the pivot 3 can be improved, and the reliability of the apparatus is increased.
[0032]
Further, in order to further enhance such a steadying effect, sliding contact portions 14 that prevent the shaking by slidingly contacting the front surface 5a side and the rear surface 5b side of the swinging arm 5 at both side positions sandwiching the swinging arm 5 are provided. It is desirable to arrange. In the present embodiment, the sliding contact portion 14 is formed between the sliding contact ring 14A interposed between the head 13a of the support shaft 13 and the swing arm 5, and between the swing arm 5 and the rising piece 2b2. The thing which consists of the slidable contact ring 14B intervening in is illustrated. In this example, the sliding contact rings 14A and 14B are in sliding contact with the front and rear surfaces 5a and 5b of the swinging arm 5 even when a load perpendicular to the swinging direction is not applied. Thereby, the shake amount of the swing arm 5 can be further reduced. The sliding contact portion 14 can be separated from the swing arm during normal use.
[0033]
As the sliding rings 14A and 14B, those using a sintered body having a low coefficient of friction impregnated with, for example, lubricating oil, resin, or ceramic are illustrated. Such sliding contact rings 14 </ b> A and 14 </ b> B can exhibit a good self-lubricating action on the sliding contact surface with the swing arm 5 by the lubricating oil contained therein, and reduce the sliding contact resistance with the swing arm 5. Thereby, while ensuring smooth movement of the footrest 4, vibration can be reduced and heat generation at the sliding contact portion can be suppressed.
[0034]
Further, in the present embodiment, the groove edge of the guide groove 12 is chamfered, and the other sliding contact rings 14A and 14B form a sliding contact surface in contact with the swing arm 5 as a part of a spherical surface. Thereby, the contact at the time of sliding contact between the sliding contact rings 14A and 14B and the swing arm 5 can be reduced to a circumferential line contact, and the friction coefficient can be reduced. Can swing back and forth.
[0035]
The sliding contact portion 14 is not limited to the oil-free bearing ring made of the sintered body as described above, and it goes without saying that various materials can be used. Further, when the sliding contact rings 14A and 14B are used, the backlash between the shaft portion 13b of the support shaft body 13 and the guide groove 12 is made larger, and the function of substantially preventing the shake by the sliding contact portion 14 only is provided. You can also.
[0036]
FIG. 7 shows another embodiment of the present invention.
In the present embodiment, the support 13 is illustrated as having a roller R that contacts the arcuate surface 12 a or 12 b of the guide groove 12. The outer diameter of the roller R is slightly smaller than the groove width of the guide groove 12, for example, 0.5 to 2.0 mm. A collar 30 that contacts the inner ring of the roller R is disposed between the roller R and the rising piece 2b2 to adjust the axial position of the roller R. The roller R is provided with an inner ring fixed to the shaft portion 13b and an outer ring rotatably. As the swing arm 5 swings, the roller R can roll while being in contact with, for example, one wall surface of the arc surface 12a or 12b, preferably the upper arc surface 12a. Such a roller R can also prevent the swing arm 5 from swinging in the direction B by contacting the upper circular arc surface 12a, and can function as the steady rest 7. Further, by providing the roller R, a part of the vertical load acting on the swing arm 5 from the footrest 4 is supported by the apparatus body 2 via the shaft portion 13b, and the load on the pivot 3 is reduced. In particular, the backlash between the pivot 3 and the swing arm 5 may be increased in this way, and the load may be substantially received by the support shaft 13. At this time, the bending moment acting on the support shaft 13 is further reduced because the distance to the footrest 4 is reduced. The roller R can also function as a load receiving portion that receives the vertical load of the swing arm 5 between the footrest 4 and the pivot 3.
[0037]
Preferably, it is more desirable to provide the guide groove 12 with a flange portion 31 that contacts the side surface of the roller R and prevents the shake. The flange portion 31 of this example is retrofitted to the first flange portion 31a formed in advance on the groove edge of the guide groove 12 of the swing arm 5 and extending into the groove, and the arc surfaces 12a and 12b of the guide groove 12. It consists of the 2nd collar part 31b fixed by. A small gap is interposed between each flange 31a, 31b and the side surface of the roller R in a normal use state. As a result, during normal use, the rolling resistance of the roller R can be reduced. On the other hand, when the runout occurs, the side surface of the roller R and the flange 31 abut against each other, and the runout can be suppressed to a small range. In addition, it is preferable to perform the appropriate surface treatment etc. which reduce frictional resistance to the contact surface with the roller R of the collar part 31. FIG.
[0038]
FIG. 8 shows still another embodiment of the present invention.
In this embodiment, an example is illustrated in which rollers 32 having a rotation axis along the longitudinal direction of the swing arm 5 are rotatably attached to both sides of the swing arm 5. In addition, holding walls 33 and 34 are provided on both sides of the swing arm 5 so as to stand upright from the roller 32 with a small gap. The holding walls 33 and 34 are fixed to the apparatus main body 2 side. Even in such a configuration, the swing can be suppressed by the collision between the roller 32 and the holding walls 33 and 34, and the swing reciprocation can be guided while preventing the swing arm 5 from swinging.
[0039]
Although the embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment. For example, the swing arm 5 is provided with a pin extending to the rising piece 2b2 side, and the rising piece 2b2 side is provided. The anti-rest 7 can be configured by providing an arc-shaped guide groove into which the pin is inserted to guide reciprocal swinging, and the present invention can be implemented in various modes. Further, the swing amount, swing speed, height from the floor surface, etc. of the footrest 4 can be appropriately determined according to the custom.
[0040]
【The invention's effect】
As described above, according to the first aspect of the invention, the abdomen swinging tool is provided with the anti-swaying tool that prevents the swinging arm from swinging in the direction perpendicular to the reciprocating swinging direction of the swinging arm. Even when an unbalanced load is applied from the leg of the user during swinging, the swing can be prevented and a smooth swinging reciprocation of the footrest can be realized. Further, by providing the anti-rest device between the footrest and the pivot, the bending moment to the pivot caused by the deflection can be reduced, and the durability of the apparatus can be improved. In addition, it is not necessary to greatly improve the processing accuracy of the pivot and the swing arm, which helps to reduce the manufacturing cost.
[0042]
According to a third aspect of the present invention, the anti-rest device includes a slidable contact portion disposed on both sides of the oscillating arm and preventing the sway by slidingly contacting the front and rear surfaces of the oscillating arm. With this configuration, it is possible to further reduce the swing of the swing arm, and the swing arm can be reciprocally swung more smoothly.
[0043]
According to a fourth aspect of the present invention, when the support includes a roller that abuts against the groove wall surface of the guide groove, for example, the groove supports the reciprocating swing of the swing arm without causing abnormal noise or the like. An anti-sway effect can be exhibited by the contact between the wall surface and the roller.
[0044]
According to a fifth aspect of the present invention, the support includes a roller that abuts against a groove wall surface of the guide groove, and the guide groove includes a flange portion that abuts against a side surface of the roller to prevent the deflection. In some cases, the swing arm can be smoothly reciprocally swung, and the vibration can be prevented not only by the contact between the groove wall surface and the roller, but also by the contact between the side surface of the roller and the flange, and more stable reciprocating swing and vibration prevention. Can be done.
[Brief description of the drawings]
FIG. 1 is a side view of an abdomen rocking device of the present embodiment.
FIGS. 2A and 2B are plan views showing a state of use. FIGS.
FIG. 3 is a side view showing the use state of FIG. 1;
FIG. 4 is a perspective view showing an internal mechanism with a cover of the abdomen rocker removed.
FIG. 5 is a cross-sectional view of FIG.
6 is a cross-sectional view taken along the line AA in FIG.
FIG. 7 is a partial cross-sectional view showing a form of a steady rest.
FIG. 8 is a partial cross-sectional view showing a form of a steady rest.
9A and 9B are cross-sectional views illustrating a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Abdominal part rocking | fluctuation tool 2 Apparatus main body 3 Pivot 4 Footrest 5 Swing arm 6 Drive part 7 Stabilizing tool 12 Guide groove 13 Support shaft body 14 Sliding contact part R Roller

Claims (5)

An apparatus body placed on the floor, and a rocker provided with a footrest on which the lower end side is pivotally supported by the apparatus body by a pivot and on which the user's foot lying on the upper end part can be placed. An abdomen swinging tool comprising a moving arm and a drive part for swinging the swinging arm back and forth in the left and right direction,
Wherein formed on the swing arm and pivot substantially on concentric, and the guide groove having an arc surface of the lower, the device is fixed to the main body and the pivot axis substantially extending parallel, said guide grooves And a support body that penetrates and contacts the upper circular arc surface , and prevents the swing arm from swinging in a direction perpendicular to the reciprocating swing direction between the footrest and the pivot. An abdomen swinging device comprising a steady rest. The device body has a mounting plate having a falling-up piece rising substantially vertically with mounted on the bottom plate of the main portion,
The support according to claim 1, characterized in that the nut at one end thereof with consists shaft that connecting the shaft portion of the small-diameter head of larger diameter, penetrating in the start-Chi-up piece is screwed The abdomen swinging tool as described.   The said steadying device is provided in the both-sides position which pinches | interposes a rocking | swiveling arm, and includes the sliding contact part which prevents the said shaking by slidingly contacting with the front surface and rear surface of this rocking | fluctuating arm. Abdominal rocker.   The abdomen swinging tool according to claim 1, wherein the support includes a roller that contacts the arc surface of the guide groove.   The said support body is provided with the roller contact | abutted to the said circular arc surface of a guide groove, and the said guide groove has a collar part which contact | abuts the side surface of the said roller and prevents the said shake | deflection. The abdomen swinging tool as described.

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