Percussive massager

• US 6,500,135 B2
• Filed: 12/30/1999
• Issued: 12/31/2002
• Est. Priority Date: 12/31/1998
• Status: Expired due to Term

• Current Assignee: FKA Distributing Co. LLC, Homedics (Lifetime Brands Incorporated)
• Original Assignee: Homedics (Lifetime Brands Incorporated)
• Inventors: Huang, Charles
• Primary Examiner(s): Brown, Michael A.
• Assistant Examiner(s): Koo, Benjamin K.
• Application Number:
  US09/475,810
• Publication Number:
  US 20010027280A1
• Time in Patent Office: 1,097 Days
• Field of Search: 601/107, 601/108, 601/110, 601/111, 601/134, 601/135, 601/129, 601/130, 601/131, 601/101, 601/103
• US Class Current: 601/108
• CPC Class Codes: A61H 2201/0153 hand-held
• CPC Class Codes: A61H 2201/1669 moving along the body in a reciprocating manner
• CPC Class Codes: A61H 2201/1685 interchangeable
• CPC Class Codes: A61H 23/0254 with rotary motor

Abstract

A percussive massager is provided having a housing including a massage head portion and a handle portion, and a motor support unit affixable within the massage head portion. A motor is supported by the motor support unit, and an output shaft rotatably driven by the motor protrudes from the motor on either side thereof. The massager further includes a set pair of vertical connecting rods each having a first end and a second end, wherein the first ends are operably connected to the output shaft such that rotation of the output shaft causes the connecting rods to reciprocate axially in an asynchronous manner. A rocker arm is attachable to the motor support unit at a central pivot axis thereof, wherein the rocker arm is operably connected to the second ends of the connecting rods and is moved about the central pivot axis by rotation of the output shaft. At least two massage nodes are operably connected to the rocker arm to form a massage surface, wherein the massage nodes are moved asynchronously toward and away from the massage head portion by each of the connecting rods to provide a percussive massage effect.

Claims

1. A percussive massager comprising:

a housing having two transversely spaced apart apertures formed therein;

a motor transversely mounted within the housing, the motor having a rotary output shaft with opposed ends protruding from opposite ends of the motor;

a pair of connecting rods each having a first end and a second end, wherein the first ends of the connecting rods are rotatably connected to the opposed ends of the output shaft at locations eccentrically spaced about the axis of rotation of the output shaft to cause the second ends of the connecting rods to reciprocate in an asynchronous manner as the output shaft rotates;

an elongated rocker arm having a central pivot axis, wherein the rocker arm is pivotably mounted relative to the housing and includes a pair of transversely spaced apart end portions each operably connected to the second ends of the connecting rods, causing the rocker arm to rock about the central pivot axis as the connecting rod second ends reciprocate;

two transversely spaced apart massage nodes which at least partially project from the housing through the apertures, each massage node operably connected to one of the spaced apart end portions of the rocker arm and associated connecting rod second end;

a pair of flexible annular sleeves mounted to the housing and generally sealing the apertures, each sleeve having a central opening sized to enable a connector to pass therethrough for mounting the massage node; and

a mounting plate for mounting the annular sleeves to the housing,

wherein the massage nodes move asynchronously toward and away from the housing providing a percussive massage effect in response to rotation of the output shaft.

2. The massager of claim 1, wherein the pair of connecting rods are operably connected to the output shaft by a pair of crank arms affixed to each end of the output shaft, wherein one connecting rod is attached to one crank arm in a first offset location with respect to a longitudinal axis of the output shaft, and the other connecting rod is attached to the other crank arm in a second offset location with respect to the longitudinal axis of the output shaft.

3. The massager of claim 2, wherein the first offset location is 180 degrees from the second offset location.

4. The massager of claim 1, wherein the rocker arm includes connectors extending therefrom for securing the massage nodes to the rocker arm.

5. The massager of claim 1, wherein the massage nodes are removable and interchangeable with another set of massage nodes.

6. The massager of claim 1, further comprising studs affixed to the second ends of each connecting rod.

7. The massager of claim 6, wherein the rocker arm includes protrusions and corresponding cavities that are aligned and sized to receive the studs.

8. The massager of claim 7, further comprising resilient sleeves affixed to the interior of the housing and sized to receive the protrusions, wherein the sleeves are operable to expand and contract in response to movement of the movement of the rocker arm by the motor.

9. The massager of claim 1, wherein the output shaft can be rotated at a plurality of speeds through actuation of a variable speed lever.

10. The massager of claim 1, wherein the housing is constructed from a plastic material.

11. The massager of claim 1, wherein the housing includes a top housing part and a bottom housing part.

12. The massager of claim 1, wherein the massage nodes are hemispherically shaped.

13. The massager of claim 1, wherein the massage nodes have an internal frame constructed from a plastic material.

14. The massager of claim 1, wherein the massage nodes have an exterior surface member constructed from a resilient material.

15. The massager of claim 1, further comprising a motor support partially surrounding the motor and mounting the motor within the housing.

16. The massager of claim 1, wherein the massager is generally symmetrical about a plane which is perpendicular to the motor axis.

17. A percussive massager comprising:

a housing;

a motor transversely mounted within the housing, the motor having a rotary output shaft with opposed ends protruding from opposite ends of the motor;

a pair of connecting rods each having a first end and a second end, wherein the first ends of the connecting rods are rotatably connected to the opposed ends of the output shaft at locations eccentrically spaced about the axis of rotation of the output shaft to cause the second ends of the connecting rods to reciprocate in an asynchronous manner as the output shaft rotates;

an elongated rocker arm having a central pivot axis, wherein the rocker arm is pivotably mounted relative to the housing and includes a pair of transversely spaced apart end portions each operably connected to the second ends of the connecting rods, the rocker arm end portions including protrusions which each define a corresponding cavity, each protrusion having a connector extending therefrom, wherein the rocker arm is caused to rock about the central pivot axis as the connecting rod second ends reciprocate;

rubber studs interposed between the connecting rod second end and the rocker arm end portion, wherein the rubber studs are received in the rocker arm cavities;

a pair of flexible annular sleeves mounted to the housing and having a central opening sized to enable the connector to pass therethrough; and

two transversely spaced apart massage nodes which at least partially project from the housing, each massage node connected by the connectors to one of the spaced apart end portions of the rocker arm and associated connecting rod second end, wherein the massage nodes move asynchronously toward and away from the housing providing a percussive massage effect in response to rotation of the output shaft.

18. A percussive massager comprising:

a housing having two transversely spaced apart apertures formed therein;

a motor transversely disposed within the housing, the motor having a rotary output shaft with opposed ends protruding from opposite ends of the motor;

a motor support affixed within the housing and partially surrounding the motor;

a pair of connecting rods each having a first end and a second end, wherein the first ends of the connecting rods are rotatably connected to the opposed ends of the output shaft at locations eccentrically spaced about the axis of rotation of the output shaft to cause the second ends of the connecting rods to reciprocate in an asynchronous manner as the output shaft rotates;

a pair of crank arms affixed to an end of the motor output shaft and provided with an eccentric attachment location for connecting the first ends of the connecting rod to the output shaft;

rotary bearings positioned at a junction of the eccentric attachment location and the connecting rod first end;

an elongated rocker arm having a central pivot axis, wherein the rocker arm is pivotably mounted relative to the housing and includes a pair of transversely spaced apart end portions each operably connected to the second ends of the connecting rods, the rocker arm end portions including protrusions which each define a corresponding cavity, each protrusion having a connector extending therefrom, wherein the rocker arm is caused to rock about the central pivot axis as the connecting rod second ends reciprocate;

rubber studs interposed between the connecting rod second end and the rocker arm end portion, wherein the rubber studs are received in the rocker arm cavities;

a pair of flexible annular sleeves mounted to the housing and having a central opening sized to enable the connector to pass therethrough; and

two transversely spaced apart massage nodes which at least partially project from the housing through the apertures, each massage node including a generally hemispherically shaped frame and a resilient exterior surface member, wherein each massage node is connected by the connectors to one of the spaced apart end portions of the rocker arm and associated connecting rod second end, wherein the massage nodes move asynchronously toward and away from the housing providing a percussive massage effect in response to rotation of the output shaft.