Abstract: The invention disclosed is an improved audio output module for use with an artificial voice generation device, having a housing separated into a sound system chamber, an interface chamber, and a power source chamber. The interface and power source chambers may be combined. The sound chamber is isolated from external air by the housing, the cover plate, and a separating wall, which separates it from other chambers of the module. Volumetric parameters based on speaker characteristics and design requirements can thus be implemented independent from the choice of interface type. The module is configurable to be mounted to an external structure or to a speech generating system. It may likewise be detachable from a quick release cradle and receive wireless audio signals from the speech generating system.

Abstract: A computer-implemented method, a machine learning system, and non-transitory computer-readable storage medium for designing electrical circuits are provided. In the method input data, comprising an indication of a plurality of connections including a first and second connection is processed to generate a representation of the electrical circuit. Routes for the first and second connections are determined using an iterative process that includes defining one or more orders in which to determine routes for the first and second connections. A Sequential Monte Carlo process is used to perform a look ahead search of each defined order by generating simulations in respect of routes to be determined for the connections in the orders, the Sequential Monte Carlo process being guided by a neural network. A connection is selected and a route for the selected connection is determined. The representation is updated by providing an action selection signal representing the determined route.

Abstract: A sole arrangement for an article of footwear with a gradient depth value is provided. In one aspect of the disclosure, the sole arrangement extending from an end of a posterior area of the sole arrangement to an end of an anterior area of the sole arrangement, wherein the posterior area of the sole arrangement being formed under a heel area and the anterior area of the sole arrangement being formed under a forefoot area of a foot. The sole arrangement having an upper facing surface and a ground engaging surface, wherein the upper facing surface being on an opposite side of the sole arrangement than the ground engaging surface. The sole arrangement having a maximum posterior depth value. The sole arrangement having a maximum anterior depth value. The maximum posterior depth value may be smaller than the maximum anterior depth value by a first margin.

Abstract: An armrest portion of a chair-type massager includes a side wall disposed generally upright at either of the left and right sides of a seat portion. An air bag configured to press the thighs of a treated person is provided on a seat side face which is the side face of the armrest portion facing the seat portion along the left-right axis. The seat side face includes a side face of the side wall facing the seat portion and an installation face. The installation face, at least when the air bag is inflated, inclines the further to the seat portion side along the left-right axis the higher up. At least part of the air bag is provided on the installation face.

Abstract: A massage device comprising a base portion having a first main surface, a plurality of support elements arranged in an array pattern about a first main surface of the base portion and extending through the first main surface thereof, and a massage member supportable by any one of the plurality of support elements, wherein the massage device is configured such that a user can rotate the massage member about an end portion of the massage member supported by the desired support element so as to exert a force on the user's body, thereby effecting a massaging of a portion of the user's body.

Abstract: A chair-type massage machine includes a main body on which a person to be treated is to be seated, a holding part at least part of which is placed inside a container recess to hold a first operation unit, and a moving mechanism for moving the holding part. The holding part is reciprocatably moved between a first position in which the first operation unit is contained in the container recess and a second position in which the first operation unit is exposed. The chair-type massage machine further includes a second operation unit for moving the holding part.

Abstract: A massage device for a seat includes a pressing portion configured to expand to press a seat occupant seated on the seat, an adjustment portion configured to adjust a position of the pressing portion between the seat occupant and the seat, a deformation detector configured to detect deformation of the seat caused by expansion of the pressing portion, and a controller configured to control the adjustment portion based on a detection result of the deformation detector.

Abstract: A massage unit includes a base member, a treatment element driven unit, and a slide mechanism. A lower portion of the treatment element drive unit is fitted to the base member to be rotatable about a first rotation axis. One end of the slide mechanism is fitted to a lower portion of the base member. The other end of the slide mechanism is fitted to the treatment element drive unit. At least one of the following structures is adopted: a structure where the one end of the slide mechanism is fitted to a lower portion of the base member to be rotatable about a second rotation axis; and a structure where the other end of the slide mechanism is fitted to the treatment element drive unit to be rotatable about a third rotation axis.

Abstract: A massage unit includes a base member, a treatment element driven unit, and a slide mechanism. A lower portion of the treatment element drive unit is fitted to the base member to be rotatable about a first rotation axis. One end of the slide mechanism is fitted to a lower portion of the base member. The other end of the slide mechanism is fitted to the treatment element drive unit. At least one of the following structures is adopted: a structure where the one end of the slide mechanism is fitted to a lower portion of the base member to be rotatable about a second rotation axis; and a structure where the other end of the slide mechanism is fitted to the treatment element drive unit to be rotatable about a third rotation axis.

Abstract: Massage mechanisms of a massage machine individually include a pair of left and right treatment members provided along a height direction of the massage machine. A first massage mechanism is disposed on a relatively upper side, and a second massage mechanism is disposed on a relatively lower side. A control means that controls operations of the first and second massage mechanisms. The control means controls advancing/retreating drive portions such that the treatment members of the first massage mechanism and the treatment members of the second massage mechanism advance or retreat at speeds different from each other such as with a time lag.

Abstract: A massage mechanism and its massager. The massage mechanism includes a base, motor, drive assembly, first drive shaft, first bearing, first massage drive assembly, first massage head assembly, inter-shaft drive assembly, second transmission shaft, second bearing, second massage drive assembly and second massage head. There is also provided a massager including the foregoing massage mechanism. The mechanism could optimize those unstable and noisy features for an ideal massage experience, and solve the problem that multiple massage actions cannot be driven by a single motor.

Abstract: A massage unit includes a treatment member; an arm that supports the treatment member; a drive shaft that supports the arm and causes the treatment member to approach and be separated with respect to a treatment target site; a movable portion that causes the treatment member to be operable in a direction of being separated from the treatment target site when the treatment member comes into contact with the treatment target site by a force equal to or greater than predetermined strength; and biasing means for biasing the treatment member in an approaching direction.

Abstract: A massage system having a massage table, support members and a massage machine is disclosed. The massage table may securely attach to the massage machine by the support members. Attachment members that massage the user's body are preferably different roller type attachments of different sizes. Multiple rollers may be attached to the massage machine one at a time. A user may select from different massage treatment options by a control panel. The user may lie face down on the massage table and the massage machine will provide a soothing back massage corresponding to the option they chose.

Abstract: A massage device includes a massage roller that extends lengthwise along an axis from a first end to a second end, opposite said first end, a grip extending from the first end, and a flexible sling extending from the second end and swivelably mounted to the second end. The sling includes an elbow harness for receiving a user's elbow. The massage roller may be urged and rolled against the first side of a user's body by holding the grip and applying a force on the elbow harness with the elbow on the opposite side of the user's body, while the massage roller is allowed to rotate about the axis without twisting the sling.

Abstract: A massage device for performing a kneading massage including paired left and right massage members, each having a treatment element, and a massage mechanism for operating at least one of the paired massage members to cause the treatment elements to move close to and away from each other in the horizontal direction to produce kneading actions. The massage member has an arm member extending substantially perpendicularly to the approaching/separating direction, and the treatment element is disposed at the front end of the arm member so that an extended line L extending along the protruding direction of the arm member passes through the interior of the treatment element.

Abstract: A roller massage apparatus is provided which enables therapy routines to be performed on various body muscle groups. A frame structure is part of the apparatus and comprises a base frame with a generally horizontal user support member having an opening being mounted thereon. The upper end of a roller structure rotatably supports a spherical roller, while its lower end mounts to the base frame so that at least a portion of the spherical roller extends through the opening of the user support member. The user operates the apparatus by positioning themselves upon the user support member and engaging with their body the portion of the spherical roller which extends through the opening. The vertical position of the spherical roller may be adjusted, and the frame structure itself may be collapseable for storage.

Abstract: A massage appliance capable of synchronous kneading and tapping includes: a power-driven vertically-moving device, including an outer portion having therein a sliding channel, and a vertically-moving rack disposed alongside the sliding channel; a device capable of synchronous kneading and tapping, including a housing portion having therein a power source for driving a first transmission device whereby a second transmission device is driven to drive a rotational inclined surface structure for driving an oscillating arm to oscillate laterally; an oscillating arm coupled to a massage head support, two infrared lamp plates and two massage heads, causing the massage heads to perform kneading-based massage, the first transmission device driving a third transmission device, whereas the third transmission device driving an eccentric cam, wherein an eccentric spindle is connected to a lever weight to pull the massage head support to perform tapping, thereby allowing the two massage heads to perform tapping-based massa

Abstract: The back kneading device mounted in the chair-type massage apparatus comprises: the massage mechanism including paired right-hand and left-hand massage members having the treatment element for massage and the driving section for transmitting massage action to the massage member; the base member for supporting the massage mechanism, with the massage member pointing forward; the vertical movement mechanism for moving the base member in the vertical direction in the backrest; and the protruding-amount varying mechanism for moving the massage member so that protrusion amount of the treatment element in the front-rear direction can be varied.

Abstract: There is provided a chair-type massage apparatus which, while having a low-height backrest, affords an adequate massage effect without forcing a user to take an uncomfortable position. The chair-type massage apparatus 1 comprises: the seat 2; the base frame 8 for supporting the seat 2 on a floor; the backrest 3 disposed at the rear of the seat 2 for the support of user's back; and the massage section 6 incorporated in the backrest 3, for performing a massage on a user sitting on the seat 2, and further includes the up-and-down means 15 for switchably changing the height of the backrest 3 vertically within a range between the housing position where the lower part of the backrest 3 is stored under the seat 2 and the protruding position where the lower part of the backrest 3 is raised to an upper location.

Abstract: A massager is provided with a housing having a first guide oriented in a longitudinal direction. A carriage is oriented in the housing and cooperates with the first guide for translation. A motor is supported upon one of the carriage and the housing and operably connected to the other for translating the carriage along the first guide. A second guide is mounted to the housing and oriented generally canted relative to the longitudinal direction. A massage member is pivotally connected to the carriage and pivotally connected to the second guide such that as the carriage is translated along the first guide, and angular orientation of the massage member is rotated relative to the carriage.

Abstract: A sole acupoint pressure massage apparatus includes a base. The base has therein a mechanism lower cover engaged therewith. The mechanism lower cover has therein a first power device and a second power device. A mechanism upper cover is disposed on the mechanism lower cover. A wavy wheel is pivotally disposed on the mechanism upper cover. A needle disk is disposed on the wavy wheel. An upper cover is disposed above the needle disk and coupled to the base. Needles are disposed on the needle disk. A first power device drives the wavy wheel to rotate. The wavy surface of the wavy wheel presses against the needles to massage sole acupoints. The second power device lifts the mechanism upper cover and drives the wavy wheel and the needles, thereby causing the needles to perform pressure massage on the sole.

Abstract: The present invention is a massage chair, having frame body with specific curve, a chair back located by the chair seat, wherein the chair back is adjusted properly by the chair seat for rotating and having a rotation angle; wherein the frame body including back section, buttock section and leg section, the buttock section has a downward curve and the leg section has an upward curve, thus, massage module can provide massage service to human thigh when the rotation angle is more than 110 degrees.

Abstract: The present invention is a massage chair, having main frame with specific curve, a chair back located by the chair seat, wherein the chair back is adjusted properly by the chair seat for rotating and having a rotation angle; wherein the main frame including back section, buttock section and leg section, the buttock section has an upward curve and the leg section has a downward curve, thus, massage provider can provide massage service to human thigh when the rotation angle is more than 110 degrees.

Abstract: A massage machine includes a seat portion, a backrest portion and a rocking mechanism center where the backrest portion reclines at a back portion side of the seat portion about a reclining center. The rocking mechanism portion swings the backrest portion and the seat portion about a rocking center, and the rocking center is apart or different from the reclining center.

Abstract: The back kneading device mounted in the chair-type massage apparatus comprises: the massage mechanism including paired right-hand and left-hand massage members having the treatment element for massage and the driving section for transmitting massage action to the massage member; the base member for supporting the massage mechanism, with the massage member pointing forward; the vertical movement mechanism for moving the base member in the vertical direction in the backrest; and the protruding-amount varying mechanism for moving the massage member so that protrusion amount of the treatment element in the front-rear direction can be varied.

Abstract: Provided is a vertical motion adjuster for a thermotherapy device capable of simultaneously accomplishing a pressing acupressure therapy effect and a pushing acupressure therapy effect. The vertical motion adjuster for the thermotherapy device includes a conveyance unit including a movable member configured to move along a mat, a support unit having one side hinged with the conveyance unit, and an elevation unit installed between the conveyance unit and the support unit and configured to raise the other side of the support unit in an arc shape. Accordingly, since the pressing acupressure therapy effect and the pushing acupressure therapy effect can be simultaneously accomplished as a moxibustion device is raised according to movement in an arc shape, a thermotherapy effect as well as an acupressure therapy effect through the moxibustion device can be improved.

Abstract: A massage bench is provided with a backrest assembly mounted on a support and including two parallel arc rails secured to the support, each rail including first teeth; and a sliding unit including an arc sliding backrest having two side first gears engaging the first teeth, and a sliding foot rest slidable about the first teeth; a drive assembly including a first motor, an output shaft operatively connected to the first gears, and a drive belt placed across the first motor and the output shaft so that the backrest and the foot rest move along the rails; and a massage assembly including a back massaging assembly in the backrest and including a moveable bracket, parallel second teeth secured to the backrest, second gears on either side of the bracket engaging the second teeth, and a second motor for driving rollers and the second gears; and a legs massaging assembly.

Abstract: A method and apparatus for a sleep system is provided. More specifically, the invention provides a method and apparatus for an adjustable mattress that allows the user to increase or decrease the firmness of the mattress. Furthermore, the adjustable mattress has zones of adjustability thereby allowing two users to adjust the firmness of the mattress of each user's zone. The adjustable mattress is also multimodal. The motorized foundation contains adjustable massaging units that may be used for physical therapy and relaxation. Likewise, the motorized foundation may be used in relax mode to assist in obtaining sleep and awaken mode to gently awake the user by the stimulation of the adjustable mattress.

Abstract: A delivery device including a roller rotatably mounted on an axle, a reservoir, and at least one hollow needle positioned in the roller are in fluid communication with the reservoir, wherein as the roller rotates about the axle, contents of the reservoir pass through the at least one hollow needle.

Abstract: A driving mechanism for a massage chair, the massage chair has a primary frame and a massaging set, the primary frame having a vertical bidirectional screw rod, a passive member connected to the massaging set jacketed onto the bidirectional screw rod. The massaging set utilizes the driving motor to provide synchronized massage movements and vertical movements, and the massaging set engages with the passive member and the bidirectional screw rod such that when the massaging set reaches to the very top end or the very bottom end the bidirectional screw rod it directly changes its direction of movement without any sensor, which can reduce and simplify structural costs.

Abstract: The invention relates to a massage or therapy table (1), constituted by a pedestal (2) intended to receive a set of moveable elements (3), characterized in that the moveable elements (3) comprise a plurality of height-adjustable rollers on which a person can rest in a lying and/or seated position, while in the space situated between two consecutive rollers a connecting strip intended to provide protection to the chest or back of the patient, and/or mouldings intended to provide side protection to the patient are fixed. Application to massages and other bodily treatments.

Abstract: An apparatus for providing a sleep support surface that includes a resiliently deformable sleep support having a person-supporting surface and a resiliently deformable layer with a substantially closed elongate opening that accommodates part of a massaging apparatus that has resistive compressive properties of a resiliently deformable layer lacking an elongate opening when the opening is closed. In one embodiment, the sleep support is a mattress having a foam layer with a slit formed therein in which a movable massager that is a massager head of the massaging apparatus is received. One mattress embodiment includes a foam submattress having a lengthwise extending slit extending substantially the length of the mattress and a mattress topper overlying the massager head.

Abstract: A single-motor massager has a base, a carriage, a gear shaft assembly, a massager assembly and a motor. The base has two gear racks. The carriage is mounted movably on the base. The gear shaft assembly is mounted on the carriage and is mounted movably on the gear racks of the base. The massaging assembly is mounted on the carriage and connects to the gear shaft assembly. The motor drives the massaging assembly of the massager assembly to provide massaging function and to move the carriage and the gear shaft assembly and the massaging assembly along the base. With the two gear racks, the massaging assembly moves stably. With only one motor and the simplified gear shaft assembly and massager assembly, the manufacturing process of the massager is simplified and the cost of the massager is reduced.

Abstract: A massage device includes a motor, a body mechanism and a massage mechanism. The body mechanism includes a faceplate, a soleplate, a massage transmission assembly and a move transmission assembly which are disposed between the faceplate and the soleplate. The massage mechanism fixed to the body mechanism includes at least one massage head, a massage assembly and a massage-head transmission assembly. The transmission of the massage device is through the engagement of the worm, the worm wheel, the massage transmission assembly, the gears, the gear rack, the planetary gear and the central gear. Such transmission enables the massage head to make four kinds of motions at the same time to achieve a variety of massage effects, change the intensity of strength and vary the massage position continuously in a larger region.

Abstract: A massage assembly includes a top cover and a base which is connected to the top cover to define a space therebetween, a massage unit and a movable unit is received in the space. The massage unit is connected to the movable unit, and a transmission mechanism is received in the movable unit to drive the movable unit to move reciprocally in the massage assembly so as to massage the user's body by the massage unit. The massage unit provides different types of massage features.

Abstract: The present invention discloses a massage apparatus having a housing with a massage formation for contacting a body part of a user. A massage mechanism is oriented within the housing for imparting a massage effect to the massage formation. A light source is provided on the massage formation for conveying an illumination effect from the massage formation. A partially translucent massager is disclosed for providing a visual effect of the underlying massage operation. Further, a roller massage assembly is provided wherein a load imparted to a roller is distributed directly to a structure of the massager for preventing distribution of the load to the massage mechanism.

Abstract: A massage roller includes a generally resilient roller body and a plurality of massage zones having various densities provided on the roller body.

Abstract: A back massaging device includes two eccentric rotation members each having an eccentric hole and a resting face, and two swing arms each provided with a mounting hole which has a sliding face. Thus, when each of the swing arms is pressed by the user's body, the sliding face of each of the swing arms is slidable on the resting face of the respective eccentric rotation member to freely adjust the angle of each of the swing arms, so that the first massaging member and the second massaging member of each of the swing arms touch the user's body evenly and exactly, and the pressing force applied by the first massaging member and the second massaging member are distributed evenly and smoothly on the user's body.

Abstract: A massaging device includes a drive mechanism, two rotation shafts mounted on and rotated by the drive mechanism, two eccentric members each having a first end mounted on a respective rotation shaft and a second end provided with an eccentric shaft, and two massaging members each mounted on the eccentric shaft of respective eccentric member. Thus, the two massaging members can be used to massage two different positions of a user's body. In addition, the massaging device is provided with two reduction gears to increase the torque of the drive mechanism to the two rotation shafts, so that the two rotation shafts are driven by the drive mechanism to drive the two massaging members and easily and conveniently.

Abstract: An angular adjusting mechanism for use in a massage device of a massage machine comprises a frame including a swing seat axially disposed thereon for pivotally rotating the angle and including upper and lower massage rollers provided thereon, and between the frame and the swing seat being defined with an angular adjusting mechanism, wherein the angular adjusting mechanism includes a bush axially fixed on the frame, the swing seat includes a driver attached thereon for urging the rotation of a screw, and another end of the screw screws with the bush; thereby during the rotation of the screw, the screw may vertically displace along the bush and actuate the swing seat to axially rotate along the frame for adjusting the swing angle and increasing the support strength of the upper and lower massage rollers.

Abstract: The present invention is to provide a massager moves on a pair of undulated tracks. The massager comprises a massaging core 1, and a base 2, which includes a tow unit 3, a shank 4, a pair of tracks 51 and a pair of undulated tracks 52. The tow unit 3 is slided along the tracks 51, the tow unit is connected to the massaging core 1 by a pivotal axle. And the massaging core 1 is further guided to move along the undulated tracks 52. Tow unit 3 meshed with the shank 4 can be driven by a driving unit and a transmission unit, thereby, the tow unit 3 can be glided along the shank 4 and the track 51. The massaging core 1 connected to a tow unit 3 can slide along a pair of undulated tracks similar to waist, back, and neck portions of human body.

Abstract: A pressure-sensing massage machine that resolves the problems of difficult assembly and adjustment and the occurrence of operational errors common to a sensing mechanism that uses many components and devices. The massage machine of the present invention is able to monitor the pressure applied to the massage recipient by a motor-driven movably extending massaging member. A flexible member is provided in the transmission located between the massage member and the motor that drives the massage member, and a pressure sensing mechanism monitors the pressure applied to the massage recipient through the flexible displacement of the flexible member.

Abstract: A massage mechanism with a moveable massage set having a biased movement is installable in a massage chair or a massage bed, a standard chair or a mattress, and so forth, which provides a massage to multiple massage areas. Each massage element is composed of two biased, separated and correspondingly symmetric swing arms and two massage wheels disposed on the same surface side of two ends of the swing arms; when massage set is turned on, the spindle drives the swing arm with a biased rotation so that the massage wheels simultaneously provide a massage effect to the insides and outsides of both legs.

Abstract: A multiple mode massage chair is provided for being interchangeably used as a seating support and a massaging platform. Above the conventional components of an advanced chair construction such as a horizontal base with a number of casters for slidably supporting the base over the floor, an upholstered seat bottom and seatback assembled to the base through a telescopic upright stand for a height adjustment from the base, the invention provides pairs of elongated cushion flaps pivotally attached to the seat bottom and seatback for selectively providing an extra cushion to the seated user on the respective seating surfaces. Each flap is shaped to flap on a bi-level pivot action to cover or expose an underlying massage surface of the chair with the assistance of a toggle action in order to facilitate the change of the mode of operation of the chair.

Abstract: A massaging device having an applicator driven by a plurality of driving unit to move along two or more different axes to generate a combined massaging action to be applied to the user's body. A controller holds individual speed data each defining a speed at which each of the driving units reciprocates the applicator along each of the different axes, and to control the driving units to reciprocate the applicator in accordance with the associated speed data. The controller controls the speed of the applicator along one of the axes independently from the speed of the applicator moving along another of the axes. Accordingly, the applicator's movements along the different axes can be free from being interfered with each other even being subject to a load, thereby assuring to continue the combined massaging action.

Abstract: The present invention is to provide a chain stabilizing device which can fundamentally solve the phenomenon of extension of a chain during use of a hyperthermo-therapeutic apparatus and allow use of existing curved rails conforming to the shape of a user's body. The present invention is to provide an apparatus for stabilizing a chain in a hyperthermo-therapeutic apparatus, comprising a chain stabilization control unit for stably moving the chain at a constant level regardless of an upward/downward movement of a hyperthermo-therapeutic unit of the hyperthermo-therapeutic apparatus during forward/backward reciprocation of the hyperthermo-therapeutic unit; and a chain-tension control unit for adjusting a tension on the chain, which can be generated during the forward and backward reciprocation of the hyperthermo-therapeutic unit.

Abstract: A massaging apparatus comprises a frame, an elevating base, a kneading device and a pounding device. The frame is composed of a bottom base, two rails, an upper transversal rod and a threaded rod. The elevating base has two U-shaped boards symmetrically mounted at two sides thereon. A rod holder is attached to a lateral section of the elevating base to combine with the threaded rod. The kneading device comprises a first motor, divider and multiple kneading rings in pairs. The pounding device comprises a second motor, two first bearing mounts, a transmitting shaft, two pulling arms, two second bearing mounts and two pounding arms. When both motors actuate individually or simultaneously, the kneading device and the pounding device provide the kneading efficiency and the pounding efficiency respectively and at the same time.

Abstract: A massage device includes a housing in which is assembled an actuating mechanism including a worm shaft and worm gears. The massage device includes at least one massage unit mounted through the housing and driven by the actuating mechanism. The massage unit includes a driving gear and a plurality of driven gears engaged with the driving gear to form a set of planetary gears. A top of each driven gear is provided with a plurality of mounting seats of different heights, and a massage member is disposed on each of the mounting seats. As multiple massage members are provided at different positions and heights, a massage action comprised of pressing and kneading movements can be produced on a region of a user's body put in contact with the massage members.

Abstract: Provided is a motor driven massage device comprising a rubbing mechanism comprising two eccentric rubbing sleeves at both ends of a motor shaft, two housings each for enclosing the rubbing sleeve, and two pairs of upper and lower arms each arm having an extended roller; a beating mechanism comprising two beating sleeves at both ends of a motor shaft, and two links each interconnected the beating sleeve and the housing; an angle adjustment mechanism comprising a rotating rod and a gear based linking assembly interconnected the rotating rod and the rubbing mechanism for adjusting an angle of each roller; and two kneading mechanisms at both sides each disposed proximate the housing and the lower arm and comprising two spaced plates and a drive source between the plates for activating the lower arms.

Abstract: A driving mechanism for a massaging device includes a housing, a driven gear rotatably mounted in the housing, a driven shaft secured to a first side of the driven gear, and an adjusting shaft mounted on a second side of the driven gear. Thus, when the driven gear is rotatable in a first direction, the adjusting shaft and the driven shaft are rotated with the driven gear simultaneously, so that the two swinging members are moved in the same direction, and when the driven gear is rotatable in a second direction, the adjusting shaft and the driven shaft are rotated with the driven gear with a time lag, so that the two swinging members are moved in the opposite direction.