System, apparatus, and method for providing a sexual stimulation device

1 . A curvilinear reciprocating device for sexual stimulation, comprising:

a main body;

a curved stimulation member that includes a curved linkage portion, which is configured to stimulate an erogenous zone of a human body, including a proximal end portion and a distal end portion and wherein the proximal end portion is coupled to the main body;

an actuator at least partially disposed within the main body and configured to actuate the distal end portion to move from a first position away from the main body to a second position that is closer to the main body than the first position; and

a curved guide member formed with a fixed curvature corresponding to the curved linkage portion, causing the curved stimulation member to reciprocate along a curved axis defined by the fixed curvature;

wherein the curved linkage portion is slidably coupled with the curved guide member, thereby defining the curved guide member and the curved linkage portion as a curved sliding pair in which the curved linkage portion is configured to move back and forth in sliding engagement with the curved guide member along the curved axis; and

wherein the curved stimulation member including the curved linkage portion maintains the fixed curvature, defined from the distal end portion to the proximal end portion, as the distal end portion moves between the first position and the second position.

2 . The curvilinear reciprocating device of claim 1 , wherein the curved linkage portion is configured to be operably rotated within the curved guide member relative to the main body.

3 . The curvilinear reciprocating device of claim 1 , further comprising a rebound mechanism configured to rebound the distal end portion from the second position to the first position, thereby causing the distal end portion to reciprocate in a curvy trajectory along the curved axis between the first position and the second position.

4 . The curvilinear reciprocating device of claim 3 , wherein the actuator includes:

a motor powered by a power source;

an eccentric wheel having a shaft hole configured to connect to an output shaft of the motor;

a bearing operably connected with the eccentric wheel; and

a flexible connecting member having a first end and a second end, wherein the first end is configured to wrap around an outside lateral wall of the bearing, and wherein the second end is connected to the curved stimulation member;

wherein the flexible connecting member is configured to be alternately pulled and loosened as the motor rotatably drives the eccentric wheel so that a coil spring of the rebound mechanism alternates between a compressed state and an extended state.

5 . The curvilinear reciprocating device of claim 4 , wherein:

the motor is configured to drive the eccentric wheel to rotate through a 0 degree position and a 180 degree position, thereby applying torque to the flexible connecting member via the eccentric wheel so that the flexible connecting member pulls the distal end portion of the curved stimulation member toward the second position to compress the coil spring; and

the coil spring, when compressed, is configured to release at least a portion of elastic potential energy as the eccentric wheel rotates past the 180 degree position, thereby causing the distal end portion of the curved stimulation member to spring back in a direction toward the first position.

6 . The curvilinear reciprocating device of claim 4 , wherein:

the coil spring, when compressed, is configured to release at least a portion of elastic potential energy as the eccentric wheel rotates more than 180 degrees; and

the motor is configured to reduce the release of elastic potential energy from the compressed coil spring as a rotational speed of the motor is increased, thereby adjusting a reciprocating motion stroke of the curved stimulation member.

7 . The curvilinear reciprocating device of claim 1 , wherein the actuator includes:

a motor;

an eccentric wheel configured to connect to an output shaft of the motor; and

a connecting member configured to operably couple the eccentric wheel and the curved stimulation member;

wherein the connecting member is a flexible band or a plurality of multi-connecting rods.

8 . The curvilinear reciprocating device of claim 1 , wherein the curved stimulation member is a curved dildo.

9 . The curvilinear reciprocating device of claim 1 , wherein the curved guide member is formed as a curved sleeve.

10 . The curvilinear reciprocating device of claim 9 , wherein:

the curved linkage portion is configured to be inserted into the curved sleeve; and

the fixed curvature of the curved sleeve corresponds to a curvature of the curved linkage portion.

11 . The curvilinear reciprocating device of claim 1 , wherein the curved linkage portion is configured to be reciprocatingly coupled with the actuator.

12 . The curvilinear reciprocating device of claim 1 , wherein the actuator includes:

a motor powered by a power source; and

a connecting member having a first end and a second end, wherein the first end is configured to couple with the motor, and wherein the second end is configured to rotatably engage the curved linkage portion about a second rotation axis.

13 . The curvilinear reciprocating device of claim 12 , wherein the actuator further includes:

a crank having a shaft hole configured to receive an output shaft of the motor; and

a connecting rod operably connected to the connecting member and the crank.

14 . The curvilinear reciprocating device of claim 1 , wherein the actuator is configured to be rotatably coupled with the curved linkage portion about a second rotation axis thereof.

15 . A reciprocating device for sexual stimulation, comprising:

a main body;

a curved stimulation member, which is configured to stimulate an erogenous zone of a human body, including a proximal end portion and a distal end portion and wherein the proximal end portion is coupled to the main body by a connecting member;

an actuator at least partially disposed within the main body and configured to actuate the distal end portion to move from a first position away from the main body to a second position that is closer to the main body than the first position; and

a guide member attached to the main body, wherein the guide member has a fixed curvature corresponding to the curved stimulation member, and is configured to movably receive the curved stimulation member such that the curved stimulation member reciprocates back and forth in sliding engagement within the guide member along a curved axis defined by the fixed curvature of the guide member.

16 . The reciprocating device of claim 15 ,

wherein the guide member and the curved stimulation member are both curvilinear; and

wherein the guide member is configured to cause the curved stimulation member to reciprocate along a curved trajectory defined by the curved axis.

17 . The reciprocating device of claim 15 , wherein the connecting member is a flexible band or a plurality of multi-connecting rods.

18 . The reciprocating device of claim 15 , further comprising a rebound mechanism configured to rebound the distal end portion from the second position to the first position, thereby causing the distal end portion to reciprocate in a curvy trajectory defined by the curved axis between the first position and the second position, and wherein the actuator is configured to actuate the connecting member and the curved stimulation member in a first direction that is opposite to a second direction in which the rebound mechanism biases the curved stimulation member.

19 . The curvilinear reciprocating device of claim 15 , wherein the actuator includes:

a motor powered by a power source;

wherein the connecting member has a first end and a second end, wherein the first end is configured to couple with the motor, and wherein the second end is configured to rotatably engage a curved linkage portion of the curved stimulation member about a second rotation axis of the curved linkage portion.

20 . The curvilinear reciprocating device of claim 19 , wherein the actuator further includes:

a crank having a shaft hole configured to receive an output shaft of the motor, and

a connecting rod operably connected to the connecting member and the crank.

21 . The reciprocating device of claim 18 , wherein the rebound mechanism is disposed on and about an exterior of the guide member.