Abstract: A lie-down massager comprises a frame having an elongated top panel with an elongated opening, a rider below the top panel, a guide member movably engaged between the frame and the rider to enable the rider to make a horizontal reciprocation relative to the frame, a lifter moving vertically relative to the rider, and a roller gear engaged to the rider. The roller gear is engaged to a vertical rack gear in an opening of an engagement body extending from the lifter so the roller gear rotation enables the lifter to make a vertical reciprocation. Massage bumps attached to the top portion of the lifter move vertically and/or horizontally along the elongated top opening of the elongated top panel of the frame by the lifter and the rider.

Abstract: The present invention provides a wave generating apparatus for generating waves in for example beds, chairs and the like. The apparatus can be constructed to include a motor and crank assembly connected to a flexible sheet and a stationary inertial member.

Abstract: A lie-down massager comprises a frame having an elongated top panel with an elongated opening, a rider below the top panel, a guide member movably engaged between the base frame and the rider to enable the rider to make a horizontal reciprocation relative to the frame, and a lifter moving vertically relative to the rider. A shaft is rotatably engaged to the rider and eccentrically connected to a cam so the shaft rotation generates an eccentric rotation of the cam defined by an inner disk, an outer ring, and ball bearings circularly provided between the inner and outer disks where an outer rim of the outer ring abuts to a bottom of the lifter so the shaft rotating further generates vertical reciprocation of the lifter relative to the rider by the eccentric rotation of the cam.

Abstract: A programmable digital-controlling massage machine includes a table, a carriage assembly, a massage device and a digital-controlling device. The table has a top for a user to lay down on. The carriage assembly is attached to the table and is controlled by the digital-controlling device. The massage device in mounted in the carriage assembly and will be moved to a position corresponding to a channel point of the body. The massage device can use vibrations, infrared heat, compressed air or the combinations to press or rub the channel point. A user can input data about own channel points through a disk, which is made prior to the massage operation.

Abstract: Massage device for an item of furniture for sitting and/or lying on, having a first shaft and a second shaft which are supported parallel with one another in a frame, and having at least one arm which carries at least one massage body, the arm being coupled to the two shafts in such a manner that a rotation of the shafts brings about a massage movement of the massage body in a first and/or second direction. Elements are also provided for displacing the massage body relative to the frame and they are formed by a mechanism for changing the distance between the two shafts.

Abstract: A massage machine has an operating control device which is easy to manipulate for the user to be massaged in a comfortable state. The massage machine (1) has a massage device (11) incorporated in a chair (8) for massaging the person to be treated, and comprises a main operating unit (18) to be manipulated by the person for directing a plurality of movements of the massage device (11) and other elements, and an auxiliary operating unit (19) for directing a specified movement included among the movements, the auxiliary operating unit (19) being movable relative to the chair (8). The auxiliary operating unit (19) is free to move, can be easily held by the hand and is therefore unlikely to cause fatigue to the hand even when held for a prolonged period of time, permitting the person to be massaged in a relaxed state.

Abstract: A hot-Acupressure and Massage machine provides conforming to the individual user's spinal shape and accommodating capability for a range of user heights. A hot-Acupressure and Massage machine has a heat-transmitter module that reciprocates under the user's back with the following provisions: a support surface, a module with a total compliance means to the spine by including a ball-socket mechanism and actuator(s), a variable compression means to the user's back from the module to allow the user to choose compressions levels for both effectiveness and comfort, a set of raised pads to help align a user to the module, a slidable headrest that adjusts to the user's height, an elevated support surface for the thighs and feet, and a belt to treat the chest, abdominal, joints, and hip areas.

Abstract: A vibrator has massaging balls supported by a treating unit that may be shifted along a subject portion for treatment, guided by guiding members. The treating unit is supported by a supporting structure with respect to the guiding members. A position or orientation altering mechanism is provided for altering the position of the treatment unit in a direction orthogonal to the direction of its shifting or the orientation of the treating unit with respect to the guiding members. The supporting structure may include an engaging unit that engages the guiding members and an arm for supporting the engaging unit.

Abstract: A device includes at least one manipulator located below the user to manipulate the user, a translator which moves the manipulator along the user, and a mechanism to change a pressure intensity of the manipulator while providing spatially uniform support to the user outside a contact patch of the manipulator. Various embodiments include adjusting tension of a membrane supporting the user above the manipulator, adjusting the vertical position of a membrane supporting the user above the manipulator, adjusting fluid pressure in a bladder located between the user and the manipulator, adjusting fluid pressure in a bladder containing the manipulator; adjusting emergence of the user in a liquid supporting the user, changing the level of liquid supporting the user relative by pumping the liquid or actuating valves which allow the liquid to flow, and injecting gas into liquid supporting the user to modifying its density.

Abstract: A massage machine is provided which is adapted to give a suitable massage in accordance with the degree of stiffness or degree of relaxation of the person to be massaged, based on the results obtained by measuring the body outline of the person and physiological data as to the person such as the pulse rate and skin temperature. The massage machine measures the body outline of the person, and measures physiological data concerning the person which is produced by massaging the person. The body outline of the person, such as the position of the neck, shoulder, back and waist is measured, and the measured physiological data is used to discriminate between the part of great stiffness and the part of low stiffness so as to give an effective massage in accordance with the degree of stiffness.

Abstract: It is a kind of kneading applied massage structure containing a base and a massage device. On the inner wall of one side of the base is bound with a sliding rail in which is bound a slide plate. A screw bolt is connected in the base, and the both two ends of the screw bolt are positioned in the pillow block for ball bearing, which connects one end of the screw bolt to the power-take-off shaft of one motor. On the screw bolt is bound with a slide plate with a positioning plate on it. The said massage device includes a tapered massage block which may rotate on request from inner to outer or from outer to inner; to position the massage device on the slide plate and positioning plate; when the motor runs, it will drive the screw bolt to rotate, which makes the slide block on the screw bolt move up or down, and the massage device will also move with the rotation. Thus, the users will enjoy the kneading massage up or down or at a fixed position on the back to relieve fatigue.

Abstract: An object of the present invention is to provide a massaging apparatus that faithfully incorporates the rhythm or melody of a music source and performs massage with accents arranged more effectively based on these. A massaging apparatus of the present invention comprises massaging mechanisms (4, 5) that give mechanical impulses to a body by driving motors (5a, 10, 11), and a control device (13) that controls operations of the motors. The control device (13) comprises a waveform converter (18) having a waveform converting circuit for converting a waveform of an audio signal input from a sound source (A), such as a smoothing circuit, a differentiating circuit, or an integrating circuit, and a specific frequency band signal selecting unit (17) having a low pass filter, a high pass filter, and a band pass filter. In accordance with a control signal output from the waveform converter (18) and the specific frequency band signal selecting unit (17), the operations of the motors are controlled.

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 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.

Abstract: A massager has a motor with a motor shaft extending out from opposite ends of the motor, a pair of linkages each rotatably and eccentrically connected to opposite ends of the motor shaft, a bridge securely attached to the linkages with a pair of flexible arms and a pair of massage nodes securely mounted on the bridge. The bridge is pivotal relative to the housing so that the movement of the linkages caused by the rotation of the motor shaft drives the massage nodes on opposite sides of the bridge to pivotally reciprocate laterally, providing a rubbing massage effect.

Abstract: A cervical vertebra massaging device with roller sets comprises a driving device driving a driven seat to move reciprocally; a main axial rod protruding from the driven seat; two axial seats; each of two sides of the main axial rod being connected to a middle section of a respective one of two axial seats; two sides of each axial seat being locked with one sub axial rod; each sub axial rod being installed with one roller set. Each ends of the axial seat is protruded with a respective sliding head which is aligned to and resists against the track and then can slide therein; at a distal end of the track is installed with a protruding slope.

Abstract: An electric massage device comprises a motor, a base, at least one gear train including a driven gear rotatably supported in the base, at least one movable member, and at least one massage member. The driven gear is driven by an output shaft of the motor. The driven gear includes engaging grooves in a side thereof. The movable member includes a toothed portion having a plurality of teeth. The massage member is securely connected to the movable member to move therewith. The engaging grooves of the driven gear and the teeth of the movable member are so configured that when the output shaft turns in a direction, the movable member and the massage member are turned, and that when the output shaft turns in a reverse direction, the movable member and the massage member move reciprocatingly.

Abstract: Massage device for an item of furniture for sitting and/or lying on, having a first shaft and a second shaft which are supported parallel with one another in a frame, and having at least one arm which carries at least one massage body, the arm being coupled to the two shafts in such a manner that a rotation of the shafts brings about a massage movement of the massage body in a first and/or second direction. Means are also provided for displacing the massage body relative to the frame and they are formed by means for changing the distance between the two shafts.

Abstract: A spinal treatment table includes a head support, a leg support, and a contoured spinal support there between defined by separate support segments of different heights. The segments are supported within a frame and connected by a scissors hinge. A first end segment is anchored to the frame, and the other segments are movable longitudinally within the frame. A linear drive is connected to a second end segment. All the segments are moved by the same amount relative to adjacent segments whenever the second end segment is moved by the linear drive to adjust the length of the spinal support for supporting spines of different lengths. A spinal manipulation device is movable within a longitudinal slot in the spinal support for evenly applying therapy to the length of the spine. The spinal manipulation device may be a reciprocating device, a roller device, or a water jet device.

Abstract: A physical therapy apparatus having a padded top surface upon which a patient comfortably reclines in the face up position with the spinal area being placed in contact respective a plurality of massaging members. The massaging members are recessed within the padded top and have a massaging members extending into contact with the patients back while jointly moved along the spine with the members being individually rapidly oscillated in a circular pattern at a selected magnitude of pressure and rate of travel.

Abstract: A first drive shaft having a pair of eccentric shaft portions at its middle part and a second drive shaft on which a pair of eccentric cum bodies having eccentric cum portions are provided, are provided in a holding body. A pair of arms are provided on the eccentric shaft portions of the first drive shaft so as to freely oscillate and main massage rollers are provided on each of the arms. The kneading movement is assigned to the main massage rollers by a drive mechanism by selectively rotating the first drive shaft or the second drive shaft. Each arm is composed of an arm housing having a first opening portion, and an arm cover which forms a holding portion having a second opening portion, being bonded to the arm housing and holding a slider so as to freely slide between the bonded surfaces.

Abstract: A massaging machine includes massaging balls, a pair of ball supporting members supporting the massaging balls, two rotary shafts such as a massaging shaft and a pounding shaft for driving the ball supporting members so as to cause the massaging balls to undergo two different treatment actions such as massaging and pounding, a single shaft holder for holding these two rotary shafts parallel to each other, connecting mechanisms connected to both end parts of these two shafts for connecting and operating together the two shafts and the ball supporting members, motors for operating these two shafts independently and motion communicating mechanisms for communicating driving power of the motors to the two rotary shafts. The shaft holder is disposed entirely between the pair of ball supporting means and includes parts that support the motors.

Abstract: A massaging machine has massaging balls, ball supporting arms for supporting these massaging balls, a first rotary shaft and a second rotary shaft that have mutually parallel axes of rotation at different heights, an eccentric part on the first shaft that is eccentric with respect to its axis of rotation, a sloped part on the second shaft that is sloped with respect to its axis of rotation, a support arm with one end part attached to the ball supporting arm and the other end part attached to the sloped part, and a link that connects the eccentric part with the support arm. The support arm has a bearing with a spherical surface. The link has a spherically shaped end part that engages with the bearing. The ball supporting arms are attached to the support arm at a height between the heights of the first and second rotary shafts.

Abstract: A device includes at least one manipulator located below the user to manipulate the user, a translator which moves the manipulator along the user, and means for changing a pressure intensity of the manipulator while providing spatially uniform support to the user outside a contact patch of the manipulator. Various embodiments include adjusting tension of a membrane supporting the user above the manipulator, adjusting the vertical position of a membrane supporting the user above the manipulator, adjusting fluid pressure in a bladder located between the user and the manipulator, adjusting fluid pressure in a bladder containing the manipulator; adjusting emergence of the user in a liquid supporting the user, changing the level of liquid supporting the user relative by pumping the liquid or actuating valves which allow the liquid to flow, and injecting gas into liquid supporting the user to modifying its density.

Abstract: A massage device for manipulating a user includes at least first and second manipulators each adapted to engage the user. A transfer assembly carries the first and second manipulators and moves the first and second manipulators along successive first and second open paths of contact on the user, respectively. The first and second open paths of contact each have engagement and disengagement points. The engagement and disengagement points of the first open path of contact are each within about two inches of the engagement and disengagement points of the second open path of contact, respectively. Various embodiments of the device are disclosed such as a handheld device wherein the manipulators are on rotating turrets and devices wherein the manipulators are moved by a belt.

Abstract: A device is used to massage the back of a person seated on a chair. The device includes a base, a motor, a transmission member, and a slide seat. The device is used such that the base is rested against the backrest of the chair. The motor, the transmission member, and the slide seat are mounted on one side of the base such that the slide seat is driven by the transmission member to move back and forth on the base. The slide seat is provided with a front swing rod, a rear swing rod, a front roller set pivoted with the front swing rod, and a rear roller set pivoted with the rear swing rod. The roller sets are carried by the slide seat in motion to move over the back of the person with pressure and friction.

Abstract: A massaging apparatus includes: a potentiometer for detecting a change in the swing angle of a swinging arm in the process of reciprocating massaging members; a skewness detector 60 for measuring skewness of the user being in contact with the massaging members, based on the change in the swing angle detected by the potentiometer; and a massaging operation controller 63 for controlling a massaging operation according to the degree and pattern of skewness detected by the skewness detector 60. With this massaging apparatus, it is possible to correct the skewness or the like and reduce stiffness by giving a suitable massage to each user, according to the skewness of the body, unbalance between the left and right sides, and differences in physical attributes.

Abstract: A relaxation station for inducing user relaxation includes a sleeve with a reclining surface attached to said frame for accommodating a limb of a user. The sleeve has a plurality of preferably pairs of massage grippers connected to and extending generally upward therefrom. These massage gripper pairs are elongated members projecting generally upward from the sleeve and the gripper pairs are capable of moving reciprocally between an open and a closed position to simulate finger manipulated massage. In a closed position, they cradle and contact the body or a portion thereof of a user. These massage gripper pairs having motive actuators for producing movement between said open and said closed positions, such as scissors extenders or flexible cables The massage gripper elongated members produce massage motions in at least one massage contact pad. The contact pads preferably have a temperature regulator and a dry hydrotherapy supply for enhancing the relaxation of a user and to simulate human massage.

Abstract: A massage machine for massaging a person's body comprising: a robot hand comprising a first digit and at least one second digit that is opposable to the first digit, wherein the first digit and at least one second digit are moveable towards and away from each other; and at least one digit actuator for moving the first digit towards and away from the at least one second digit to massage a region of the person's body to which at least one of the digits is pressed.

Abstract: A massage assembly (20) wherein a massage unit (40) comprising a therapeutic member (50) for massaging the body of the user by a kneading and/or tapping movement is reciprocatingly moved between a pair of frames (22)(23) and which comprises a motion converting mechanism for converting the reciprocating movement of the massage unit (40) to the kneading and/or tapping movement of the therapeutic member (50). The massage assembly (20) is incorporated in a backrest (16) of a chair (12) or a bed to provide a massage machine (10) of the invention.

Abstract: A reciprocally moving apparatus used in a massage machine comprises a long driven shaft having two ends pivotably installed in a base plate and also inserted into a sleeve hole at the lower side of a bottom mount of a massage device. The center section of the driven shaft includes a clockwise helical trench and a counter-clockwise helical trench which are arranged along a surface of the driven shaft and are crossed over one another alternatively and the ends of the two trenches are connected. The upper side of the center section area of the bottom mount serves for installing a cylindrical active link block having a guide plate. The guide plate has two tips at the upper side and inserts into one of the two tracks. Therefore, the driven shaft can be driven to move along the trenches reciprocally.

Abstract: A massage device includes a main body provided with a supporting groove in which a calf of a leg can be disposed, a sliding member slidably inserted into the main body, and a first massager for massaging the calf. The first massager is installed on a rear side of the supporting groove and includes an electric motor, a power transmission device for converting a rotational motion of the motor into a reciprocal motion, and a first massage member for massaging the calf while moving along the supporting groove. The first massage member is fixed on the power transmission device.

Abstract: A massaging apparatus enabled to provide sufficient treatment effects by stimulating the Keiketsu (or the effective spots) in the Eastern Medical Science effectively. The massaging apparatus comprises: memory devices recorded with treatment contents indicating effective point positions to be massaged according to a treatment course and massage actions to be applied to the effective spot positions; and control devices for causing the massage member to massage the effective spot positions of the body of the using person in accordance with the treatment contents recorded in the memory devices. The massaging apparatus further comprises: treatment course select devices for selecting the treatment course.

Abstract: A seating system for providing spinal motion and support. Said system comprising a substantially static structure adjacent to the back of a user, a moving apparatus supplying a motive force, wherein the moving apparatus is adjacent to the buttocks and thighs of the user and is powered by the lower extremities of the user, a force applying means disposed between the static structure and the back of the user, the force applying apparatus including a back engaging surface for increasing and decreasing a force applied to the back of the user in response to the supplied motive force, and a means for locking the moving apparatus in place. Various embodiments of moving apparatus, force applying means, and locking and/or motion limiting means are presented.

Abstract: A massage device includes a main body provided with a supporting groove in which a calf of a leg can be disposed, a sliding member slidably inserted into the main body, and a first massager for massaging the calf. The first massager is installed on a rear side of the supporting groove and includes an electric motor, a power transmission device for converting a rotational motion of the motor into a reciprocal motion, and a first massage member for massaging the calf while moving along the supporting groove. The first massage member is fixed on the power transmission device.

Abstract: A massage and exercise device includes a main body provided with a supporting groove in which a calf of a leg can be disposed, a sliding member slidably inserted into the main body, a first massager for massaging the calf, and a controller for controlling the first massager. The first massager is installed on a rear side of the supporting groove and includes an electric motor, a power transmission device for converting a rotational motion of the motor into a reciprocal motion, and a first massage member for massaging the calf while moving along the supporting groove. The first massage member is fixed on the power transmission device. An exercise device is provided on the sliding ember.

Abstract: In operating a massaging machine having massaging members and a motor for causing the massaging members to vibrate to massage a patient, a pulsed driving signal is applied to the motor for repetitively switching on and off the motor for specified time lengths such that the motor is intermittently activated, rather than continuously.

Abstract: Disclosed is a spine massager including a massaging member configured to move vertically along with horizontal reciprocating movements, thereby providing an enhanced massaging therapy effect.

Abstract: A massage chair capable of massaging even the foot by utilizing a whirlpool formed by the spouting of water is disclosed, in which the chair can be moved back and forth, its seatback can be reclined, and the instep and the sole of the foot can be massaged. The massage chair includes a supporting structure 20 and a seat 10. The seat 10 consists of a seat cushion 11 mounted and secured upon the supporting structure 20, and a seatback 12 upstanding on a rear edge of the seat cushion 11. A massaging mechanism 50 is internally installed within the seatback 12, and a seat moving mechanism 40 moves the seat cushion 11 back and forth. A foot bath tub 30 is formed on the supporting structure 20 in front of the seat cushion 11, and the foot bath tub 30 has water spouting holes 31, 32 and 33 on its bottom, on its side walls and on its rear wall respectively, and has a water spouting shower device 34 above it.

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.

Abstract: A relaxation station for inducing user relaxation includes a couch having a frame and a reclining surface attached to said frame for accommodating a user in a reclining position. The frame has a plurality of preferably pairs of massage grippers connected to and extending generally upward therefrom. These massage gripper pairs are elongated members projecting generally upward from the frame and the gripper pairs are capable of moving reciprocally between an open and a closed position to simulate finger manipulated massage. In a closed position, they cradle and contact the body or a portion thereof of a user. These massage gripper pairs having motive actuators for producing movement between said open and said closed positions, such as scissors extenders or flexible cables The massage gripper elongated members produce massage motions in at least one massage contact pad.

Abstract: A massage device for massaging back and/or feet of a user consists of groups of massaging elements connected together so that the elements of each group move together to execute a recurrent motion and press against a resilient surface in contact with the user. The elements in each group are able to move independently of the other groups and the elements are arranged in parallel rows with the massaging elements of each row staggered along the row with respect to the massaging elements of an adjacent row.

Abstract: A hand-held massager having a flat vibrating massage head and a pair of percussion massage nodes all being driven by a single internal drive unit. The percussion massage nodes are adjustable for width adjustments being manually controlled by the flat massage head on the opposite side of the massage head. Separate push button controls covered by a sealing membrane are carried on the body of the unit to control power, speed and type of massage.

Abstract: A massage machine is provided which is adapted to give a suitable massage in accordance with the degree of stiffness or degree of relaxation of the person to be massaged, based on the results obtained by measuring the body outline of the person and physiological data as to the person such as the pulse rate and skin temperature. The massage machine comprises means for measuring the body outline of the person, and means for measuring physiological data concerning the person and produced by massaging the person. The body outline measuring means detects the body outline of the person, such as the position of the neck, shoulder, back and waist, while the physiological data measuring means discriminates between the part of great stiffness and the part of low stiffness so as to give an effective massage in accordance with the degree of stiffness.

Abstract: A massager to be inserted in the back of massage chairs, comprising a frame which supports a massage assembly constituted by a plurality of massage wheels actuated by at least one gearmotor; the frame is movable in a vertical direction, and the massage assembly is independent of the frame and can move at right angles to a plane in which the frame is formed.

Abstract: An apparatus for rising and falling a medicator of an automatic hot-heat treatment device, includes: a movement space formed vertical to a main body of a movable body horizontally moving along with a screw rotated by a motor; a treatment device moving plate having a carrying bar insertedly bound with the movement space and moving in the movement space its horizontal movement and a jaw at the lower end portion of the carrying bar; and a rising and falling spring positioned between the treatment device moving plate and the movable body, for moving the madicator up and down so as to be tensed and contracted according to the curve of the body of the user to thereby pressurize and foment the diseased part of the user.

Abstract: An apparatus for massaging toes having a plurality of massaging fingers which provide the massaging effect on and between the toes of a user. The massaging fingers are powered by a drive mechanism means, such as an electric motor and a motion transfer apparatus.

Abstract: The invention provides a massage machine for health care which comprises a living body information sensor 5 for detecting living body information of the autonomic nervous system of the person to be massaged, a control circuit 6 for judging the psychological state of the person based on the living body information detected, and a memory 61 for holding histories of psychological states of persons to be massaged. The machine is adapted to judge the physical condition of the person based on the history of psychological states of the person, and to judge whether the condition of the person's health is improved by massage so as to utilize the result of judgement as guidelines for health care.

Abstract: The device is intended to make massages of the left side of the user's back independently from the right side of the user's back, with the added possibility of regulating the intensity of such massage also independently in the modes of kneading, tapping vertical displacement. It has four independent motors (1, 3, 10 and 12) governed by a control unit (18) and which transmit the rotation to respective excentric (2, 4, 11 and 14) or centered (22) axes which are connected to conventional massage applicating elements (5 and 14). Said axes (2, 4, 11 and 14) or (22) include sensors (17) which inform on the angular position. The device is also provided with two motors (9 and 16) for the vertical displacement which are also connected to the control unit (18).

Abstract: A hand-held massager having a flat vibrating massage head and a pair of percussion massage nodes all being driven by a single internal drive unit. The percussion massage nodes are adjustable for width adjustments being manually controlled by the flat massage head on the opposite side of the massage head. Separate push button controls covered by a sealing membrane are carried on the body of the unit to control power, speed and type of massage.

Abstract: A foldable massaging mattress is disclosed. The massaging mattress includes a mattress body having a protruding pillow portion at an end thereof and a track having a first end and a second end. The track is arranged in the mattress body and extends in the longitudinal midway of the mattress body. The track has at least two sections pivotally connected with each other. A gear case is arranged in the protruding pillow portion of the mattress body in a location adjacent to the first end of the track. A sprocket case is arranged in the mattress body in a location adjacent to the second end of the track. A DC motor is included for driving the gear case. A carriage has opposed two ends and is movable along the track. A chain runs between the gear and sprocket cases and has two ends attached to the opposed two ends of the carriage. The chain is driven by the gear case.