JP6606380B2 - Rotating damper for auxiliary equipment - Google Patents

Description

  The present invention relates to a damper for a prosthesis incorporated in a body prosthesis, and in particular, a first mounting body applied to a part of the body of the prosthesis and a second mounting body applied to another part. The present invention relates to a damper for a prosthesis that absorbs the relative kinetic energy.

  Conventionally, as a damper for a prosthetic device, for example, a viscous material, a case fixed to a lower leg member as a first attachment body, and a lower end connected to a foot member side as a second attachment body. A one-way damper is known which has a piston rod whose upper end is in contact with a viscous material in the case and generates viscous resistance when the piston rod moves upward due to the swing of the foot member with respect to the lower leg member (patent) Reference 1).

Japanese Patent No. 5493724 (see in particular paragraph 0018 and FIG. 1)

  However, the conventional one-way damper described above has a so-called direct-acting damper structure in which the piston rod moves linearly with respect to the case. Therefore, during the wearer's rehabilitation, the body is bent and stretched or bent. When an excessive impact is applied, the oil leakage or hydraulic pressure decreases when a viscous fluid such as oil is used as a viscous material due to a bottom thrust that reaches the limit of the set stroke length of the piston rod. As a result, there was a problem that the damper function deteriorated.

  Therefore, the present invention solves the problems of the prior art as described above, i.e., the object of the present invention is to apply an excessive impact with the body bending / extending operation or bending operation in the rehabilitation of the wearer. Damper function with excellent shock resistance while absorbing and mitigating excessive impact generated at the place where the prosthesis is worn on the body by controlling attenuation of the relative kinetic energy between the first wearing body and the second wearing body even when loaded It is providing the rotation type damper for prostheses which exhibits this stably over a long period of time.

The invention according to claim 1 is a first mounting body applied to a part of the body and a first mounting body which is rotatably connected to the first mounting body and applied to a part different from the part of the body. A rotary damper for a prosthesis that is incorporated in a prosthesis including two mounting bodies and absorbs relative kinetic energy between the first mounting body and the second mounting body, the first mounting body and A case attached to one of the second attachment bodies, a rotor attached to the other of the first attachment body and the second attachment body and accommodated in the case so as to be rotatable relative to the case; and the case and the rotor And one of the case and the rotor has a plurality of annular concave grooves that accommodate the viscous fluid, and the other of the case and the rotor has a viscous fluid in the annular concave groove. A plurality of the annular ridges and the plurality By having a bypass section that connects Jo grooves together, it is intended to solve the aforementioned problems.

  In the invention according to claim 2, in addition to the configuration of the rotary damper for a prosthesis described in claim 1, the rotor is detachably attached to the case, and the case and the rotor are The above-described problems are further solved by being detachably attached to the first mounting body and the second mounting body, and at least one of the case and the rotor being provided interchangeably.

  The invention according to claim 3 is the above-described problem because the viscous fluid is a silicone-based viscous agent in addition to the configuration of the rotary damper for a prosthesis described in claim 1 or claim 2. Is a further solution.

  The invention according to claim 4 includes the viscous fluid of at least one of the case and the rotor, in addition to the configuration of the rotational damper for a prosthesis described in any one of claims 1 to 3. The part which contacts is formed in the embossed shape, and the subject mentioned above is further solved.

  The invention according to claim 5 includes the viscous fluid of at least one of the case and the rotor in addition to the configuration of the rotational damper for a prosthesis described in any one of claims 1 to 4. The contact portion has a viscous fluid non-slip groove, and the direction of the viscous fluid anti-slip groove is a radial direction based on the center of the relative rotation, thereby further solving the above-described problem. is there.

According to the sixth aspect of the present invention , in addition to the configuration of the rotary damper for a prosthesis described in any one of the first to fifth aspects, the rotor is configured so that the entire inner peripheral wall of the case is formed. By providing the rotor peripheral wall concentrically opposed over the circumference, the above-described problems are further solved.

According to the seventh aspect of the present invention , in addition to the configuration of the rotational damper for a prosthesis described in any one of the first to sixth aspects, the first mounting body is a foot on which a foot is placed. A mounting body, wherein the second mounting body is a calf mounting body that is pivotally connected to the foot mounting body and applied to a calf shin, and the prosthesis is a lower limb orthosis This further solves the aforementioned problems.

In the invention according to claim 8, in addition to the configuration of the rotary damper for a prosthesis described in any one of claims 1 to 7, the first mounting body is applied to the waist. A waist attachment body, wherein the second attachment body is an upper attachment body that is laterally bent with respect to the waist attachment body and applied to the chest, and the prosthesis is a trunk orthosis In this way, the above-described problems are further solved.

  The rotation type damper for a prosthesis according to the present invention has a first attachment body applied to a part of the body, and is rotatably connected to the first attachment body and applied to a part different from the body part. By being incorporated in a prosthesis equipped with a second mounting body that is peeled off, it is possible not only to absorb relative kinetic energy between the first mounting body and the second mounting body, but also as follows. A specific effect can be produced.

According to the rotary damper for a prosthesis of the invention according to claim 1, the case is attached to one of the first mounting body and the second mounting body, and is attached to the other of the first mounting body and the second mounting body. When the rotor is rotated relative to the case, the rotor is housed in the case so as to be rotatable relative to the case, and the viscous fluid is interposed in the gap between the case and the rotor. The viscous fluid generates a viscous resistance by the shearing force acting in the rotational direction between the case side and the rotor side, and this viscous resistance becomes a kinetic energy damping force. Therefore, during the wearer's rehabilitation, Even when an excessive impact is applied due to a bending operation or the like, the viscous fluid interposed in the gap between the rotor and the case attenuates the relative kinetic energy between the first mounting body and the second mounting body to compensate for the body. Live at the brace Excessive damper function with excellent impact resistance as well as absorb reduce impact can be exhibited over a long period of time that.
Then, one of the case and the rotor has a plurality of annular grooves that accommodate the viscous fluid, and the other of the case and the rotor has an annular protrusion that engages with the annular grooves through the viscous fluid, Since the viscous fluid moves between the plurality of annular grooves through the bypass portion due to the pressure difference between the plurality of annular grooves, the plurality of annular grooves are connected to each other. It is possible to stabilize the damping force by eliminating the excess or deficiency of the viscous fluid between the annular grooves.

  According to the rotating damper for a prosthesis of the invention according to claim 2, in addition to the effect of the invention according to claim 1, the rotor is detachably attached to the case. It is attached to the first mounting body and the second mounting body in a detachable manner, and at least one of the case and the rotor is provided so as to be exchangeable, so that the surface area of the viscous fluid can be changed and the case can be changed. When the rotor rotates relatively, the magnitude of the viscous resistance generated by the shearing force acting in the rotating direction between the case side and the rotor side can be changed, so depending on the progress of the wearer during rehabilitation The damping force can be adjusted.

  According to the rotating damper for a prosthesis of the invention according to claim 3, in addition to the effect exerted by the invention according to claim 1 or claim 2, the viscous fluid is a silicone-based viscous agent. A fluid whose viscosity is very high compared to the viscosity of conventional oil can be used, damping force can be easily generated with viscous resistance caused by shear force, and damper function due to leakage etc. The decrease can be suppressed.

  According to the rotating damper for a prosthesis of the invention according to claim 4, in addition to the effect exerted by the invention according to any one of claims 1 to 3, the viscous fluid of at least one of the case and the rotor The contact area between the viscous fluid and the embossed part increases because the part that contacts with the embossed part is formed in the embossed shape. Therefore, the damping force is avoided by avoiding the slip between the viscous fluid and the embossed part. Can be stabilized.

  According to the rotary damper for a prosthesis of the invention according to claim 5, in addition to the effect produced by the invention according to any one of claims 1 to 4, the viscous fluid of at least one of the case and the rotor The portion in contact with the fluid has a viscous fluid non-slip groove, and the direction of the viscous fluid anti-slip groove is a radial direction with respect to the center of relative rotation. Since the adhesion force is increased, the damping force can be stabilized by avoiding the slip between the viscous fluid and the viscous fluid anti-slip groove.

According to the rotating damper for a prosthesis of the invention according to claim 6 , in addition to the effect produced by the invention according to any one of claims 1 to 5, the rotor is provided on the case inner peripheral wall of the case. By providing the rotor peripheral wall concentrically opposed over the entire circumference, when the rotor rotates relative to the case, viscous fluid is generated between the case side and the rotor side. Since the viscous resistance region can be generated over the entire circumference region, the viscous fluid interposed in the gap between the rotor and the case attenuates the relative kinetic energy between the first mounting body and the second mounting body. The damper function can be demonstrated in the entire circumference.

According to prosthesis for the pivot damper of the invention according to the claims 7, in addition to the effects of the invention according to any one of claims 1 to 6, the first mounting member is, the plantar It is a foot placement body to be placed, the second attachment body is a calf attachment body that is rotatably connected to the foot placement body and applied to the calf shin, and the prosthesis is a lower limb orthosis Thus, when the rotor rotates relative to the case, the viscous fluid generates a viscous resistance by a shearing force acting in the rotational direction between the case side and the rotor side, and this viscous resistance is a kinetic energy damping force. Therefore, even if an excessive impact is applied to the ankle of the lower limbs, the viscous fluid intervening in the gap between the rotor and the case will cause the relative kinetic energy between the footrest and calf Absorbing and mitigating excessive shock that occurs at the ankle of the lower limb by controlling attenuation It can be exhibited over an excellent damper function to the force-term.
Furthermore, since it is a rotary damper, there is no bottom thrust generated between the piston rod and cylinder as in the conventional linear motion damper, and the loss of the damper function due to the bottom thrust is eliminated. It can be demonstrated over a long period of time.
In addition, since it is a so-called viscous shear type rotary damper, it is possible to use a viscous fluid whose viscosity is much higher than that of conventional oil. Can be demonstrated.

According to the rotating damper for a prosthesis according to the eighth aspect of the present invention, in addition to the effect produced by the invention according to any one of the first to seventh aspects, the first mounting body is applied to the waist. A waist mounted body that is peeled off, a second mounted body is a top mounted body that is connected to the waist mounted body so as to bend laterally and is applied to the chest, and the prosthetic device is a trunk orthosis As a result, when an impact is applied to the trunk due to lateral bending in the lateral direction, the viscous fluid acts in the rotational direction between the case side and the rotor side as the rotor rotates relative to the case. Since viscous resistance is generated by shearing force and this viscous resistance becomes a kinetic energy damping force, the viscous fluid intervening in the gap between the rotor and the case attenuates the relative kinetic energy between the waist attachment body and the upper attachment body. Control the chest and lumbar area (especially the thoracic and lumbar vertebrae) Jill it is possible to absorb mitigate excessive shock, excellent damper function in impact resistance can be exhibited over a long term.
Also, when the rotor rotates relative to the case by laterally bending the trunk in the left-right direction, viscous fluid generates viscous resistance due to the shearing force acting in the rotation direction between the case side and the rotor side. Since this viscous resistance is used as a correction force, a feeling of pressure is generated on the bent side, and a bounce reflection, which is one of posture reflections, is generated, and a scoliosis curvature can be prevented and corrected.
Furthermore, since it is a rotary damper, since the generation of a sudden urging force by lifting the operating lever of the urging spring portion and extending the tension coil spring as in the conventional case is eliminated, the wearer can remove the trunk orthosis. The load adjustment at the time of mounting becomes unnecessary, and the mounting time can be shortened.
In addition, since it is a rotary damper, there is no sag of the tension coil spring due to the constant generation of tensile force during installation as in the prior art, so there is no loss of the damper function due to the sag of the tension coil spring. The damper function can be exhibited over a long period of time.
In addition, since it is a so-called viscous shear type rotary damper, the viscosity of the viscous fluid is much higher than that of the conventional oil, so that the viscous fluid does not leak, so that the damper function is demonstrated over a long period of time. be able to.

The perspective view of the elbow orthosis which is an example of the prosthesis provided with the rotation type damper for prostheses which is 1st Example of this invention. 1 is a perspective view of a rotary damper for a prosthesis that is a first embodiment of the present invention. (A) is a plan view seen from the reference 3A shown in FIG. 2, (B) is a cross-sectional view seen from the reference 3B-3B shown in FIG. 3 (A), (C) is seen from the reference 3C shown in FIG. Bottom view. (A) is a bottom view of the case of the first embodiment of the present invention, (B) is a cross-sectional view taken along 4B-4B shown in FIG. (A) is a plan view of the rotor of the first embodiment of the present invention, (B) is a cross-sectional view taken along the line 5B-5B shown in FIG. 5 (A), (C) is the first embodiment of the present invention. The bottom view of a rotor. (A) is a plan view of the cover of the first embodiment of the present invention, (B) is a cross-sectional view taken along the line 6B-6B shown in FIG. 6 (A), (C) is the first embodiment of the present invention. The bottom view of a cover. (A) is a plan view of the rotor of the second embodiment of the present invention, (B) is a cross-sectional view taken along the line 7B-7B shown in FIG. 7 (A), (C) is a second embodiment of the present invention. Sectional drawing of the rotation type damper for auxiliary devices. The perspective view of the lower limb orthosis which is an example of the prosthesis provided with the rotation type damper for prostheses of this invention. The perspective view of the trunk orthosis which is an example of the prosthesis provided with the rotation type damper for prosthesis of this invention.

The present invention includes a first mounting body applied to a part of the body and a second mounting body that is rotatably connected to the first mounting body and applied to a part different from the body part. A rotary damper for a prosthesis that is incorporated in a prosthesis and absorbs relative kinetic energy between the first attachment and the second attachment, and is attached to one of the first attachment and the second attachment A case, a rotor attached to the other of the first mounting body and the second mounting body and accommodated in the case so as to be rotatable relative to the case, and a viscous fluid interposed in a gap between the case and the rotor. One of the case and the rotor has a plurality of annular grooves that accommodate the viscous fluid, and the other of the case and the rotor has an annular protrusion that engages with the annular grooves through the viscous fluid, and a bypass unit that connects the annular groove to each other, the case On the other hand, when the rotor rotates relative to each other, the viscous fluid generates a viscous resistance by a shearing force acting in the rotational direction between the case side and the rotor side, and this viscous resistance becomes a kinetic energy damping force. During rehabilitation, even if an excessive impact is applied due to the bending / extending movement or bending movement of the body, the viscous fluid interposed in the gap between the rotor and the case causes the relative kinetic energy between the first mounting body and the second mounting body. If the damper function is controlled to attenuate the excessive impact generated at the place where the prosthesis is worn on the body and the damper function with excellent impact resistance is demonstrated stably over a long period of time, the specific implementation Any aspect may be used.

For example, the rotational damper for a prosthesis may be one that attaches a cover to a case that accommodates the rotor and seals the viscous fluid, or one that does not have a cover.
Further, the material of the case and the rotor may be metal or industrial resin.
Further, any viscous fluid can be used as long as the viscous fluid generates a viscous resistance by a shearing force acting in a rotating direction between the case side and the rotor side when the rotor rotates relative to the case. It does not matter.
The prosthetic device is an upper limb orthosis (an elbow orthosis, a finger orthosis, a wrist joint orthosis, a hand), as long as the first attachment body and the second attachment body, which are respectively applied to the body, are rotatably connected. Gripping braces, etc.), lower extremity braces (ankle braces, knee braces, etc.), trunk braces (lumbar braces, crotch braces, etc.), etc.

Hereinafter, an elbow orthosis EO, which is an example of a prosthesis provided with a rotary damper 100 for a prosthesis according to a first embodiment of the present invention, will be described with reference to FIG. Will be described with reference to FIGS. 2 to 6C.
Here, FIG. 1 is a perspective view of an elbow orthosis EO that is an example of a prosthesis equipped with a rotary damper 100 for prosthesis according to the first embodiment of the present invention, and FIG. FIG. 3 is a perspective view of a rotary damper 100 for a prosthesis according to one embodiment, FIG. 3A is a plan view seen from a reference 3A shown in FIG. 2, and FIG. 3A is a cross-sectional view taken along the line 3B-3B shown in FIG. 3A, FIG. 3C is a bottom view taken along the line 3C shown in FIG. 2, and FIG. 4A is the first embodiment of the present invention. 4B is a bottom view of the case of the example, FIG. 4B is a cross-sectional view taken along the line 4B-4B shown in FIG. 4A, and FIG. 5A is the first embodiment of the present invention. 5B is a plan view of the rotor, FIG. 5B is a cross-sectional view taken along the line 5B-5B shown in FIG. 5A, and FIG. 5C is the rotor of the first embodiment of the present invention. FIG. 6 ( ) Is a plan view of the cover of the first embodiment of the present invention, FIG. 6B is a cross-sectional view taken along the line 6B-6B shown in FIG. 6A, and FIG. It is a bottom view of the cover of 1st Example of this invention.
Note that in this specification, a diagram viewed from the reference numeral 3A side shown in FIG. 2 is a plan view, and a diagram viewed from the reference numeral 3C side shown in FIG. 2 is a bottom view.

As shown in FIG. 1, an elbow orthosis EO, which is an example of a prosthesis according to the first embodiment of the present invention, includes a forearm attachment body FA as a first attachment body applied to a forearm that is a part of the body, Upper arm mounting body UA as a second mounting body that is rotatably connected to forearm mounting body FA and applied to the upper arm and the shoulder, which are parts different from the forearm, and forearm mounting body FA and upper arm mounting body UA And a rotary damper 100 for a prosthesis that absorbs relative kinetic energy.
The forearm mounting body FA is fixed to the forearm by the forearm strap FA1, and the upper arm mounting body UA is provided to be fixed to the upper arm by the upper arm strap UA1.
When the elbow brace EO is mounted, the swing brace 100 for the prosthetic device is easy to adjust the damping force by exchanging all or part of the swivel damper 100 for the brace while visually observing the wearer. If it is for the right arm, it is provided on the right side.

As shown in FIGS. 2 to 6 (C), the rotation damper 100 for the auxiliary equipment includes a metal case 110, a synthetic resin rotor 120, a viscous fluid 130, a metal cover 140, A case-side O-ring 150A made of elastic rubber and a cover-side O-ring 150B also made of elastic rubber are provided.
Among these, the case 110 is attached to the forearm mounting body FA which is one of the forearm mounting body FA and the upper arm mounting body UA.
Specifically, the case 110 includes a cylindrical case main body 111 having open end portions for accommodating the rotor 120, and a case flange 112 formed on the outer peripheral surface of one end surface of the case main body 111. I have.

Among these, the case main body 111 has a case-side rotor insertion hole 111a, an inner annular groove 111b, an outer annular groove 111c, a cover mounting female screw groove 111d, and a seal case inner peripheral surface 111e. .
The case-side rotor insertion hole 111a is formed on one end side in the rotational axis direction of the case main body 111 so that a part of the rotor 120 is inserted therethrough.
The inner annular concave groove 111 b is formed inside the case body 111 and is configured to accommodate the viscous fluid 130.
The outer annular groove 111c is also formed outside the inner annular groove 111b on the inner side of the case, and is configured to accommodate the viscous fluid 130.

The cover attachment female thread groove 111 d is formed on the other end side in the rotation axis direction of the case main body 111 and is configured to be screwed with the cover 140.
The seal case inner peripheral surface 111e is provided in contact with the outer peripheral side of the case side O-ring 150A.
As an example, three screw holes 112a are arranged in the rotation direction R at equal intervals in the case flange 112, and the case 110 is configured to be screwed to the forearm mounting body FA as an example.

The rotor 120 is attached to the upper arm mounting body UA which is the other of the forearm mounting body FA and the upper arm mounting body UA, and is accommodated in the case so as to be rotatable relative to the case 110.
Specifically, the rotor 120 includes a cylindrical rotor main body 121 and a disk-shaped rotor flange 122 on the outer circumferential surface 121d of the rotor.
Among these, the rotor main body 121 has a shaft fitting hole 121a, a seal case side rotor main body outer peripheral surface 121b, and a seal cover side rotor main body outer peripheral surface 121c.
And the seal case side rotor main body outer peripheral surface 121b side of one end side of the rotation axis direction of the rotor main body 121 is inserted into the case side rotor insertion hole 111a, and the seal cover side rotor main body outer peripheral surface 121c side of the other end side of the rotation axis direction is inserted. It is configured to be inserted into a cover-side rotor insertion hole 141 of the cover 140 described later.

As an example, the shaft fitting hole 121a is configured such that a mounting body side rotation axis AX formed in the upper arm mounting body UA is fitted.
Seal case side rotor main body outer peripheral surface 121b is provided in contact with the inner peripheral side of case side O-ring 150A.
The seal cover side rotor main body outer peripheral surface 121c is provided in contact with the inner peripheral side of the cover side O-ring 150B.

The rotor flange 122 has an inner annular protrusion 122a, an outer annular protrusion 122b, a bypass slit 122c as a bypass part, and a flange through hole 122d.
Among these, the inner annular ridge 122 a is installed so as to be engaged with the inner annular concave groove 111 b of the case 110 so as to be concavo-convex through the viscous fluid 130 with a gap.
The outer annular ridge 122b is formed on the outer side of the inner annular ridge 122a, and is disposed so as to engage with the outer annular groove 111c of the case 110 with a gap therebetween via the viscous fluid 130.

The bypass slit 122c extends in a radial direction with respect to the center of relative rotation so as to connect across the inner annular groove 111b and the outer annular groove 111c of the case 110. Three pieces of R are arranged at equal intervals.
The flange through holes 122d are formed so as to pass through the rotor flange 122 in the rotation axis direction X, and as an example, three flange holes 122d are arranged at equal intervals in the rotation direction R.

The viscous fluid 130 is interposed in the gap between the case 110 and the rotor 120, and when the rotor 120 rotates relative to the case 110, the viscous fluid 130 rotates between the case 110 side and the rotor 120 side. Viscosity resistance is generated by a shearing force acting on R.
The viscous fluid 130 of the present embodiment is a silicone-based viscous agent such as a silicone-based unvulcanized rubber having a plasticity of 30 to 420, for example.

The cover 140 is attached to the case flange 112 side of the case 110 so as to cover the rotor 120 accommodated in the case 110.
Specifically, the cover 140 includes a cover-side rotor insertion hole 141, a cover mounting male screw groove 142, a seal cover inner peripheral surface 143, and a cover mounting recess 144.
Among these, the cover-side rotor insertion hole 141 is configured such that the seal cover-side rotor main body outer peripheral surface 121c side on the other end side in the rotation axis direction of the rotor main body 121 is inserted through the cover-side rotor insertion hole 141 as described above.

The cover mounting male screw groove 142 is formed on the outer peripheral edge of the cover 140, and is configured to be screwed with the cover mounting female screw groove 111d of the case 110.
The seal cover inner peripheral surface 143 is provided in contact with the outer peripheral side of the cover-side O-ring 150B.
For example, four cover mounting recesses 144 are arranged at equal intervals in the rotation direction R, and a tool such as a jig is attached to the cover mounting recess 144 when the cover 140 is rotated with respect to the case 110 and attached. It is comprised so that it may fit.

The case side O-ring 150A is installed between the seal case inner peripheral surface 111e of the case 110 and the seal case side rotor main body outer peripheral surface 121b of the rotor 120.
Similarly, the cover-side O-ring 150B is installed between the seal cover inner peripheral surface 143 of the cover 140 and the seal cover-side rotor main body outer peripheral surface 121c of the rotor 120.

As shown in FIG. 3B, the case side rotor contact surface 111f provided on the case 110 and the rotor side case contact surface provided on the rotor 120 on the outer peripheral side from the case side O ring 150A and the cover side O ring 150B. 122e is in contact, and the contact portion is annular, and similarly, the cover-side rotor contact surface 145 provided on the cover 140 and the rotor-side cover contact surface 122f provided on the rotor 120 are in contact with each other. Thus, the contact portion is annular, and the viscous fluid 130 between the rotor flange 122 and the case main body 111 and between the rotor flange 122 and the cover 140 is sealed.
The case-side O-ring 150A and the cover-side O-ring 150B are configured to further seal the viscous fluid 130 in an auxiliary manner.

In this embodiment, the case 110 attached to the forearm attachment body FA, the rotor 120 attached to the upper arm attachment body UA and accommodated in the case so as to be rotatable relative to the case 110, the case 110 and the rotor 120, A viscous fluid 130 interposed in the gap between the case 110 and the rotor 120 relative to the case 110. When the rotor 120 rotates relative to the case 110, the viscous fluid 130 is a shearing force acting in the rotation direction R between the case 110 side and the rotor 120 side. In this configuration, viscous resistance (viscous shear resistance) is generated.
As a result, a so-called viscous shear type rotary damper can be used even when the viscosity of the viscous fluid 130 is much higher than that of the oil, so that the viscous fluid 130 leaks during the rehabilitation of the wearer. No worries.

Further, in this embodiment, the rotor 120 is detachably attached to the case 110, the case 110 and the rotor 120 are detachably attached to the forearm attachment body FA and the upper arm attachment body UA, and the case 110 and At least one of the rotors 120 is provided interchangeably.
As a result, the surface area for applying shear resistance to the viscous fluid 130 can be freely changed, and when the rotor 120 rotates relative to the case 110, it acts in the rotation direction R between the case 110 side and the rotor 120 side. The magnitude of the viscous resistance generated by the shearing force can be changed.
That is, the damping force can be adjusted according to the progress of the wearer during rehabilitation.
Further, in the present embodiment, as described above, when the viscous fluid 130 is a silicone-based viscous agent, the viscosity of the viscous fluid 130 is extremely higher than the viscosity of the conventional oil, so that the resistance force is high. growing.

Furthermore, in the present embodiment, as an example, the inner circumferential side surface 122ba and the outer circumferential side surface 122bb of the outer annular ridge 122b that contacts the viscous fluid 130 in the rotor 120, which is at least one of the case 110 and the rotor 120, are embossed. It has been subjected.
As a result, the friction coefficient between the viscous fluid 130 and the inner peripheral side surface 122ba and the outer peripheral side surface 122bb, which are embossed surfaces, is increased, and the resistance force is further increased.

In this embodiment, as an example, a minute viscous fluid non-slip groove that contacts the viscous fluid 130 is formed on the top surface 122bc of the outer annular ridge 122b of the rotor 120 that is at least one of the case 110 and the rotor 120. ing.
The direction of the minute viscous fluid anti-slip groove on the top surface 122bc is provided in a radial direction with respect to the center of relative rotation.
Thereby, the slip between the viscous fluid 130 and the top surface 122bc can be avoided and the damping force can be stabilized.

In the present embodiment, the case 110 which is one of the case 110 and the rotor 120 has an inner annular groove 111 b and an outer annular groove 111 c as a plurality of annular grooves that accommodate the viscous fluid 130.
Then, the rotor 120, which is the other of the case 110 and the rotor 120, has an inner annular ridge as an annular ridge that engages with the inner annular groove 111b and the outer annular groove 111c of the case 110 via the viscous fluid 130, respectively. 122a and outer annular ridge 122b.
As a result, the shear region of the viscous fluid 130 becomes wider as compared with the case where the uneven engagement is not performed.

Furthermore, in this embodiment, the rotor 120 has a bypass slit 122c that is a bypass portion that connects the inner annular groove 111b and the outer annular groove 111c of the case 110.
As a result, the viscous fluid 130 passes through the bypass slit 122c of the rotor 120 due to the difference between the pressure of the viscous fluid 130 in the inner annular groove 111b of the case 110 and the pressure of the viscous fluid 130 in the outer annular groove 111c. It moves between the inner annular groove 111b and the outer annular groove 111c.
That is, the viscous fluid 130 between the inner annular groove 111b and the outer annular groove 111c is not excessively or insufficiently eliminated, and the damping force of the rotary damper 100 for a prosthesis is stabilized.

In the present embodiment, the bypass slit 122c is provided in the rotor 120. However, by not providing the bypass slit 122c, the outer peripheral side surface 122bb of the outer annular ridge 122b of the rotor 120 is entirely covered by the case inner peripheral wall of the case 110. You may comprise so that it may become a rotor surrounding wall concentrically opposingly arranged over the periphery.
Thus, when the rotor 120 rotates relative to the case 110, a viscous resistance region in the rotational direction R in which the viscous fluid 130 is generated between the case 110 side and the rotor 120 side is generated over the entire circumference. .

In the present embodiment, the rotor 120 is provided with a flange through hole 122d.
Thereby, the pressure of the viscous fluid 130 between the rotor flange 122 and the inner annular groove 111b and the outer annular groove 111c of the case 110, and the pressure of the viscous fluid 130 between the rotor flange 122 and the cover 140 are Due to the difference, the viscous fluid 130 is between the rotor flange 122 of the rotor 120 and the inner annular groove 111b and the outer annular groove 111c of the case 110 via the flange through hole 122d, and the rotor flange 122. Between the cover 140 and the cover 140.
That is, the viscous fluid 130 between the case 110 side and the cover 140 side with respect to the rotor flange 122 as a reference is eliminated, and the damping force of the rotary damper 100 for a prosthesis is further stabilized.

  The thus obtained rotary damper 100 for the prosthesis according to the first embodiment of the present invention is one of the forearm mounting body FA as the first mounting body and the upper arm mounting body UA as the second mounting body. A case 110 attached to a certain forearm attachment body FA and a rotor attached to the upper arm attachment body UA which is the other of the forearm attachment body FA and the upper arm attachment body UA and accommodated in the case so as to be rotatable relative to the case 110 120 and a viscous fluid 130 interposed in the gap between the case 110 and the rotor 120. When the rotor 120 rotates relative to the case 110, the viscous fluid 130 is between the case 110 side and the rotor 120 side. Due to the configuration in which viscous resistance is generated by the shearing force acting in the rotational direction R, excessive impact is caused by the body bending and stretching movements and bending movements in the rehabilitation of the wearer. Even when loaded, the viscous fluid 130 interposed in the gap between the rotor 120 and the case 110 attenuates and controls the relative kinetic energy between the forearm mounting body FA and the upper arm mounting body UA, and the elbow is the mounting position of the prosthetic device in the body. In addition to absorbing and mitigating excessive impact generated in the damper, it is possible to exhibit a damper function having excellent impact resistance over a long period of time.

Further, since at least one of the case 110 and the rotor 120 is provided to be exchangeable, the damping force can be easily adjusted according to the progress of the wearer during rehabilitation.
Furthermore, when the viscous fluid 130 is a silicone-based viscous agent, it is possible to easily generate viscous resistance due to shearing force.
Further, the rotor 120 that is at least one of the case 110 and the rotor 120 has a textured surface on the inner peripheral side surface 122ba and the outer peripheral side surface 122bb of the outer annular ridge 122b that contacts the viscous fluid 130. The damping force can be stabilized by avoiding the slip between the viscous fluid 130 and the inner peripheral side surface 122ba and the outer peripheral side surface 122bb.

  Furthermore, the top surface 122bc of the outer annular ridge 122b of the rotor 120, which is at least one of the case 110 and the rotor 120, has a viscous fluid non-slip groove, and the orientation of the viscous fluid anti-slip groove on the top surface 122bc is relative rotation. With the radial direction based on the center of movement, slip between the viscous fluid 130 and the top surface 122bc can be avoided and the damping force can be stabilized.

  In addition, the case 110 which is one of the case 110 and the rotor 120 has an inner annular groove 111b and an outer annular groove 111c as a plurality of annular grooves that accommodate the viscous fluid 130, and the other of the case 110 and the rotor 120. The rotor 120 is an inner annular ridge 122a and an outer annular ridge 122b as annular ridges engaged with the inner annular groove 111b and the outer annular groove 111c via a viscous fluid 130, respectively, and an inner annular groove By having a bypass slit 122c, which is a bypass portion connecting the groove 111b and the outer annular groove 111c, the viscous fluid 130 between the inner annular groove 111b and the outer annular groove 111c of the case 110 is provided. The effect is enormous, for example, the damping force can be stabilized without excessive or insufficient.

Next, a rotational damper 200 for a prosthesis that is a second embodiment of the present invention will be described with reference to FIG.
Here, FIG. 7 (A) is a plan view of the rotor 220 of the second embodiment of the present invention, and FIG. 7 (B) is a sectional view taken along the line 7B-7B shown in FIG. 7 (A). FIG. 7C is a cross-sectional view of the rotary damper 200 for a prosthesis according to the second embodiment of the present invention.

  The rotary damper 200 for the auxiliary device according to the second embodiment is flattened without providing the outer annular ridge 122b of the rotor 120 of the rotary damper 100 for the auxiliary device according to the first embodiment. Since the elements are the same as those of the rotary damper 100 for the auxiliary device according to the first embodiment, detailed description of the common matters is omitted, and only the reference numerals of the 200 series in which the lower two digits are common are attached.

As shown in FIGS. 7A and 7B, the rotor flange 222 of the rotor 220 of the second embodiment is provided with an annular ridge 222a.
As shown in FIG. 7C, in the rotor flange portion 222, the annular protrusion 222a engages with the inner annular groove 211b of the case main body 211 via the viscous fluid 230, and the outer annular groove 211c. It is the structure which does not engage with unevenness.

As a result, the surface area of the rotor 220 in contact with the viscous fluid 230 becomes smaller than that of the first embodiment described above, and when the rotor 220 rotates relative to the case 210, the viscous fluid 230 is separated from the case 210 side and the rotor. The magnitude of the viscous resistance generated by the shearing force acting in the rotation direction R with the 220 side is smaller than that in the first embodiment.
That is, the damping force of the assisting device rotary damper 200 is reduced.
In this way, by changing the shape of the portion of the rotor 220 or the case 210 that contacts the viscous fluid 230, the contact area with the viscous fluid 230 is changed, respectively, and the damping force of the rotational damper 200 for the auxiliary equipment is changed. The size may be changed.

Next, as a third embodiment, a lower limb orthosis LO in which the rotary brace 300 for a prosthesis according to the present invention is incorporated will be described with reference to FIG.
Here, FIG. 8 is a perspective view of a lower limb orthosis LO which is an example of a prosthesis provided with the rotational damper 300 for the prosthesis of the present invention.
The rotation damper 100 for the auxiliary device of the third embodiment is the same as the rotation damper 100 for the auxiliary device of the first embodiment, and the rotation damper 100 for the auxiliary device of the first embodiment has many elements. Therefore, detailed description of common items is omitted.

As shown in FIG. 8, the lower limb orthosis LO is a foot placement body FM as a first mounting body on which a sole is placed, and is connected to the foot placement body FM so as to be rotatable and applied to an inflated shin. A calf mounting body CS as a second mounting body to be peeled off, and a rotary damper 300 for a prosthesis that absorbs relative kinetic energy between the foot rest body FM and the calf mounting body CS are provided.
The assistive device rotary damper 300 has an outer side when the lower limb orthosis LO is attached so that the wearer can easily adjust the damping force by exchanging all or part of the auxiliary device rotary damper 300. That is, it is provided on the right side for the right leg.
The case of the pivoting damper 300 for the accessory is screwed and attached to the foot rest FM that is one of the foot rest FM and the calf attachment body CS.
For example, a mounting body-side rotation axis AX formed on the calf mounting body CS is fitted to the rotor of the auxiliary equipment rotating damper 300.

In the present embodiment, the rotation damper 300 for the prosthesis is used for the lower limb orthosis LO.
As a result, when the rotor rotates relative to the case, the viscous fluid generates a viscous resistance by a shearing force acting in the rotational direction between the case side and the rotor side, and this viscous resistance is a kinetic energy damping force. It becomes.
As a result, even if an excessive impact is applied to the ankle of the lower limbs, the viscous fluid intervening in the gap between the rotor and the case causes the relative kinetic energy between the footrest and the calf attachment body to be increased. It is possible to absorb and relieve an excessive impact generated in the ankle of the lower limbs by damping control and to exhibit a damper function excellent in impact resistance over a long period of time.

Furthermore, since the rotary damper is used, there is no bottom butt generated between the piston rod and the cylinder of the direct acting damper as in the prior art.
As a result, there is no loss of the damper function due to bottoming, and the damper function can be exhibited over a long period of time.
In addition, since it becomes a so-called viscous shear type rotary damper, it can be used even when the viscosity of the viscous fluid is much higher than that of the conventional oil, so that the leakage of the viscous fluid is eliminated.
As a result, the effect can be enormous, for example, the damper function can be exhibited over a long period of time.

Subsequently, as a fourth embodiment, a trunk orthosis TLO in which the rotational damper 400 for a prosthesis according to the present invention is incorporated will be described with reference to FIG.
Here, FIG. 9 is a perspective view of a trunk orthosis TLO which is an example of a prosthesis provided with the rotational damper 400 for the prosthesis of the present invention.
The rotation damper for auxiliary devices 400 of the fourth embodiment is the same as the rotation damper 100 for auxiliary devices of the first embodiment, and the rotation damper 100 for auxiliary devices of the first embodiment has many elements. Therefore, detailed description of common items is omitted.

Conventionally, for thoracic and lumbar spine injuries, diseases, and post-operative external fixation devices, a soft frame made of cloth or synthetic fiber, or a rigid frame made of metal or synthetic resin, and tightened to the chest and waist to rest There is known a so-called corset structure including a string to be fixed and Velcro (registered trademark).
Conventionally, a chest pressing body as an upper mounting body having a waist mounting member as a waist mounting body and an arch-shaped arm that is pivotally supported by pivots provided on both side surfaces of the waist mounting member and can swing in the front-rear direction. There is known a pressing force applying portion that is provided at an intermediate portion of the arm and includes a biasing spring portion that applies a pressing force for pressing the chest pressing body against the chest and a link mechanism (for example, international (See especially publication 2014/0554097, paragraphs 0021 to 0041, FIGS. 1 to 4).

However, the structure of the so-called corset is based on the premise that the thoracic vertebra and lumbar vertebra are rested and fixed. Therefore, when used as an auxiliary device, the part that does not require rest fixing cannot be made swingable in the front-rear and left-right directions. It was.
Moreover, since the above-mentioned conventional pressing force application part (International Publication No. 2014/054097) is based on the premise that the trunk can swing in the front-rear direction, it is used for the purpose of preventing and correcting scoliosis. In this case, even if the structure of the pressing force application part consisting of the biasing spring part and the link mechanism is moved from the left and right side surfaces of the trunk to the front and rear surfaces (abdominal back surface), the pressing force is applied in the left or right direction. There is a problem that it is difficult to cope with lateral bending of the trunk in the left-right direction.

  Therefore, as shown in FIG. 9, the trunk orthosis TLO of the present embodiment includes a waist attachment body LP as a first attachment body applied to the waist and an upper attachment body as a second attachment body applied to the chest. Rotating damper 400 for a prosthesis that absorbs relative kinetic energy between TP, waist mounting body LP, and upper mounting body TP, and an upper part that connects upper mounting body TP and rotating damper 400 for an accessory A mounting body side connecting portion TPB, and a waist mounting body side connecting portion LPB that connects the waist mounting body LP and the rotational damper 400 for the accessory are provided.

That is, the upper mounting body TP and the upper mounting body side connecting portion TPB, and the waist mounting body LP and the waist mounting body side connecting portion LPB are connected to the left and right pivotable dampers 400 so as to be freely rotatable to the left and right. .
In addition, in order to mount the upper mounting body TP and the waist mounting body LP in accordance with the wearer's trunk on at least one of the upper mounting body side coupling portion TPB and the waist mounting body side coupling portion LPB, a length adjustment mechanism is provided. It may be provided.

The upper mounting body side connecting portion TPB is provided with a hinge that can swing in the front-rear direction with respect to the waist mounting body LP.
The upper mounting body TP is provided with a shoulder belt that prevents the displacement from the chest and a chest fixing band that is fixed to the chest.
The waist attachment body LP is provided with a waist fixing band that prevents the slippage from the waist.
The shoulder belt includes, for example, a shoulder pad, a string, and a magic tape (registered trademark).

The chest fixing band and the waist fixing band are made of, for example, a string or Velcro (registered trademark).
The assisting device rotary damper 400 is a front side when the trunk orthosis TLO is mounted, that is, an abdomen side so that the wearer can easily adjust the damping force by replacing the rotating damper 400 for the accessory device. Is provided.
A case of the rotational damper 400 for the auxiliary equipment is attached by being screwed to the upper mounting body TP which is one of the waist mounting body LP and the upper mounting body TP.
For example, a mounting body side rotation axis AX formed on the waist mounting body LP is fitted to the rotor of the rotation damper 400 for the accessory.

The rotation damper 400 for the accessory is attached to the trunk orthosis TLO so that the wearer can easily adjust the damping force by exchanging all or a part of the rotation damper 400 for the accessory while visually checking the wearer. It is provided on the front side of the hour.
In addition, a hinge TPH is installed on the chest mounting body side from the rotation brace 400 for the prosthetic device so that the wearer can bend forward.

In the present embodiment, a rotating damper 400 for a prosthesis is used for the trunk orthosis TLO.
As a result, when an impact is applied to the trunk caused by lateral bending in the left-right direction, the viscous fluid acts in the relative rotation direction between the case side and the rotor side as the rotor rotates relative to the case. A viscous resistance is generated by a shearing force, and this viscous resistance becomes a kinetic energy damping force.
As a result, the viscous fluid intervening in the gap between the rotor and the case attenuates and controls the relative kinetic energy between the waist attachment body LP and the upper attachment body TP, and excessively occurs in the chest and lumbar region (particularly the thoracic vertebra and lumbar vertebrae). A damper function with excellent impact resistance that absorbs and relaxes the impact can be exhibited over a long period of time.

Also, when the rotor rotates relative to the case by laterally bending the trunk in the left-right direction, viscous fluid generates viscous resistance due to the shearing force acting in the rotation direction between the case side and the rotor side. Let this viscous resistance be the correction force.
As a result, a pressure sensation is generated on the side bent and a recoil reflection, which is one of posture reflections, is generated, and scoliosis curvature can be prevented and corrected.

In addition, since the rotary damper is used, a sudden biasing force generated by lifting the operating lever of the biasing spring portion and extending the tension coil spring as in the prior art is eliminated.
As a result, it is unnecessary to adjust the load when the trunk orthosis TLO is worn by the wearer, and the effect can be shortened.

100, 200 ... Rotating dampers 110, 210 ... Case 111, 211 ... Case body 111a ... Case side rotor insertion holes 111b, 211b ... Inner annular groove 111c 211c ... Outer annular concave groove 111d ... Cover mounting female screw groove 111e ... Seal case inner peripheral surface 111f ... Case side rotor contact surface 112 ... Case flange 112a ... Screw hole 120, 220 ... rotor 121, 221 ... rotor body 121a, 221a ... shaft fitting hole 121b ... seal case side rotor body outer peripheral surface 121c ... seal cover side rotor body outer peripheral surface 121d ... Rotor outer peripheral surfaces 122, 222... Rotor flange 122a.
222a ... annular ridge 122b ... outer annular ridge 122ba ... inner peripheral side surface (texture-like surface)
122bb ... outer peripheral side surface (textured surface)
122bc ... Top surface (viscous fluid anti-slip groove)
122c, 222c ... Bypass slit (bypass section)
122d, 222d ... 鍔 Through hole 122e ... Rotor side case contact surface 122f ... Rotor side cover contact surface 130, 230 ... Viscous fluid 140, 240 ... Cover 141 ... Cover side rotor insertion Hole 142 ... Cover mounting male thread groove 143 ... Seal cover inner peripheral surface 144 ... Cover mounting recess 145 ... Cover side rotor contact surface 150A, 250A ... Case side O-ring 150B, 250B ... · Cover side O-ring AX ··· Mounting body side rotation axis R ··· Turning direction X ··· Rotary axis direction EO · Elbow orthosis FA · Forearm mounting body FA1 · Forearm strap UA・ ・ ・ Upper arm attachment body UA1 ・ ・ ・ Upper arm strap LO ・ ・ ・ Lower limb orthosis CS ・ ・ ・ Sheath attachment body FM ・ ・ ・ Foot placement body TLO ・ ・ ・ Trunk orthosis T ... upper mounting member TPB ... upper mounting body side connecting portion TPH ... hinge LP ... waist attachment body LPB ... waist attachment body side connecting portion

Claims (8)

A prosthesis comprising a first mounting body applied to a part of the body and a second mounting body rotatably connected to the first mounting body and applied to a part different from the part of the body A rotary damper for a prosthesis that is incorporated in and absorbs relative kinetic energy between the first mounting body and the second mounting body,
A case attached to one of the first mounting body and the second mounting body;
A rotor attached to the other of the first mounting body and the second mounting body and housed in the case so as to be rotatable relative to the case;
A viscous fluid interposed in the gap between the case and the rotor,
One of the case and the rotor has a plurality of annular grooves that store the viscous fluid,
The other of the case and the rotor includes an annular ridge that engages with the annular groove through a viscous fluid and a bypass portion that interconnects the plurality of annular grooves. Rotating damper for assistive devices.   The rotor is detachably attached to the case, the case and the rotor are detachably attached to the first mounting body and the second mounting body, and at least one of the case and the rotor is exchanged The rotation type damper for a prosthesis according to claim 1, wherein the rotation damper is provided freely.   The rotary damper for a prosthesis according to claim 1 or 2, wherein the viscous fluid is a silicone-based viscous agent.   The part for contact with the viscous fluid of at least one of the case and the rotor is formed in a textured shape, and the rotation type for a prosthetic device according to any one of claims 1 to 3. damper. A portion that contacts the viscous fluid of at least one of the case and the rotor has a viscous fluid non-slip groove,
The rotation type for a prosthetic device according to any one of claims 1 to 4, wherein a direction of the non-slip groove for the viscous fluid is a radial direction based on the center of the relative rotation. damper.   6. The supplement according to claim 1, wherein the rotor includes a rotor peripheral wall disposed concentrically and opposedly over the entire circumference of the case inner peripheral wall of the case. Rotating damper for braces.   The first mounting body is a foot mounting body on which a sole is placed, and the second mounting body is rotatably connected to the foot mounting body and applied to a calf shin. The rotary damper for a prosthesis according to any one of claims 1 to 6, wherein the prosthesis is a lower limb orthosis.   The first mounting body is a waist mounting body applied to the waist, and the second mounting body is connected to the waist mounting body so as to be laterally bent to the waist and is applied to the chest. The rotary damper for a prosthetic device according to any one of claims 1 to 7, wherein the prosthetic device is a trunk orthosis.