Swingable loading device

A swingable loading device contains: a base, a support rack fixed above the base, a swing mechanism and an adjustment mechanism which are housed between the base and the support rack. The swing mechanism includes a first rotatable arm set fixed on the base and driven by a first drive source and includes a second rotatable arm set rotatably connected with a rotary shaft, the first rotatable arm set and the support rack. The first rotatable arm set drives the second rotatable arm set to swing reciprocately along the rotary shaft, and the second rotatable arm set drives the support rack to swing reciprocately. The adjustment mechanism includes a displacement assembly fixed on the second rotatable arm set which drives the first rotatable arm set to move along the second rotatable arm set so as to adjust a distance between the first rotatable arm set and the rotary shaft.

FIELD OF THE INVENTION

The present invention relates to a swingable loading device which is capable of adjusting a holding plate to swing back and forth based on desired amplitudes.

BACKGROUND OF THE INVENTION

Referring toFIGS. 1 and 2, a sliding device is disclosed in TW Publication No. M400790 and contains: a base10, a plurality of roller sets12configured to support a slidable rack12, and a holding plate13disposed on the slidable rack12, such that the slidable rack12and the holding plate13slide reciprocately on the base10. Between the base10and the slidable rack12is defined a driving mechanism20, and the driving mechanism20includes a power source21mounted on the base10and configured to drive an eccentric shaft22to rotate, and a swing arm23is rotatably connected with the eccentric shaft22and the slidable rack12, such that the eccentric shaft22rotates to drive the swing arm23to swing back and forth, and the swing arm23actuates the slidable rack12and the holding plate13to slide reciprocately. However, the slidable rack12and the holding plate13cannot be adjusted to slide based on desired amplitudes.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a swingable loading device which contains a support rack fixed above a base, and a swing mechanism housed between the base and the support rack, wherein the swing mechanism includes a crank shaft mounted on the base and configured to drive a first rotatable arm set to swing reciprocately, a second rotatable arm set rotatably connected with a rotary shaft on the base, and the second rotatable arm set also rotatably connects with an end portion of the first rotatable arm set and the support rack, such that the first rotatable arm set drives the second rotatable arm set to swing back and forth along the rotary shaft, and the second rotatable arm set drives the support rack to swing reciprocately.

Another objective of the present invention is to provide a swingable loading device which contains an adjustment mechanism which includes a displacement assembly fixed on the second rotatable arm set, wherein the displacement assembly drives the end portion of the first rotatable arm set to move along the second rotatable arm set so as to adjust a distance between the end portion of the first rotatable arm set and the rotary shaft of the second rotatable arm set, such that the first rotatable arm set actuates the second rotatable arm set to swing back and forth at different amplitudes, and the second rotatable arm set derives the support rack to swing reciprocately at the different amplitudes.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference toFIGS. 3 to 5, a swingable loading device according to a preferred embodiment of the present invention comprises: a base30, a support rack31, a swing mechanism, and an adjustment mechanism.

The base30is a rectangular frame, the support rack31is fixed and swings back and forth above the base30, and a plurality of posts32are mounted between and rotatably connected with the base30and the support rack31, such that the support rack31swings back and forth above the base30along the plurality of posts32. The base30includes two fixing plates301disposed adjacent to a central position thereof, and between the two fixing plates301is defined an accommodation space for housing the swing mechanism and the adjustment mechanism between the base30and the two fixing plates301, such that the swing mechanism and the adjustment mechanism drive the support rack31to swing back and forth above the base30. The swing mechanism includes a crank shaft41mounted on the base30and driven by a first drive source40to rotate, wherein the crank shaft41has an eccentric section411which rotatably connects with a first rotatable arm set42, such that when the crank shaft41is driven by the first drive source40to rotate, the eccentric section411of the crank shaft41drives the first rotatable arm set42to swing back and forth. In this embodiment, the first drive source40is a first motor401housed between the two fixing plates301, and an output shaft of the first motor401and the crank shaft41connect with a transmission structure, such that the first motor401drives the crank shaft41to revolve via the transmission structure, and the eccentric section411of the crank shaft41drives the first rotatable arm set42to swing back and forth, wherein the transmission structure includes the output shaft of the first motor401, a first belt pulley set402connected with the output shaft of the first motor401, a first transmission shaft403coupled with the first belt pulley set402, a second belt pulley set404joined with the first transmission shaft403, a second transmission shaft405connected with the second belt pulley set404, and a third belt pulley set406coupled with the second transmission shaft405and the crank shaft41, such that the first motor401drives the crank shaft41to rotate through the first belt pulley set402, the first transmission shaft403, the second belt pulley set404, the second transmission shaft405, and the third belt pulley set406. The base30further includes a rotary shaft431secured thereon and rotatably connected with a lower end of a second rotatable arm set43, such that the second rotatable arm set43swings along the rotary shaft431. In addition, the second rotatable arm set43is rotatably coupled with an end portion of the first rotatable arm set42and the support rack31, such that the first rotatable arm set42actuates the second rotatable arm set43, the second rotatable arm set43swings back and forth along the rotary shaft431, and the second rotatable arm set43drives the support rack31to swing reciprocately. In this embodiment, the first rotatable arm set42has an actuation shaft421disposed on the end portion thereof and rotatably coupled with the second rotatable arm set43, such that the first rotatable arm set42actuates the second rotatable arm set43to move back and forth. The second rotatable arm set43has a connecting post433mounted on an upper end thereof, and the support rack31includes a coupling element311configured to rotatably connect with the connecting post433of the second rotatable arm set43, hence the second rotatable arm set43drives the support rack31to swing back and forth.

The adjustment mechanism includes a displacement assembly50fixed on the second rotatable arm set43, wherein the displacement assembly50drives the actuation shaft421of the first rotatable arm set42to move along the second rotatable arm set43so as to adjust a distance between the actuation shaft421of the first rotatable arm set42and the rotary shaft431of the second rotatable arm set43, hence the second rotatable arm set43actuates the second rotatable arm set43to swing reciprocately at different amplitudes, and the second rotatable arm set43drives the support rack31to reciprocately at the different amplitudes. In this embodiment, the displacement assembly50includes a second drive source secured on one side of the second rotatable arm set43, and the second drive source is a second motor51configured to drive a threaded rod52. The displacement assembly53further includes a moving element53, a first end of which screws with a threaded sleeve531of the threaded rod52, and the moving element53has a connection portion532configured to rotatably connect with the actuation shaft421of the first rotatable arm set42. The second rotatable arm set43has a guiding groove432defined thereon so as to accommodate the actuation shaft421of the first rotatable arm set42, and the actuate shaft421moves upward and downward along the guiding groove432, hence the second motor51drives the threaded rod52to swivel, the threaded rod52actuates the moving element53to move and drives the actuation shaft421to move along the guiding groove432of the second rotatable arm set43, and the distance between the actuation shaft421of the first rotatable arm set42and the rotary shaft431of the second rotatable arm set43is adjusted so that the first rotatable arm set42drives the second rotatable arm set43to swing reciprocately at the different amplitudes, and the support rack31is actuated by the third rotatable arm set43to swing reciprocately at the different amplitudes. In this embodiment, the support rack31further includes a holding plate60disposed thereon so that user lies, sits or stands on the holding plate60. For example, when the user lies on the holding plate60, the swing mechanism drives the rack support31and the holding plate60to swing back and forth, and the adjustment mechanism adjusts the support rack31and the holding plate60to swing reciprocately at the different amplitudes based on using requirements.

Referring toFIG. 6, in operation, the first motor401of the first drive source40drives the crank shaft41to rotate, the eccentric section411of the crank shaft41drives the first rotatable arm set42to swing back and forth, and the actuation shaft421of the first rotatable arm set42actuates the second rotatable arm set43to swing reciprocately along the rotary shaft431, wherein a maximum swing distance of the first rotatable arm set42is L, the distance between the actuation shaft421of the first rotatable arm set42and the rotary shaft431of the second rotatable arm set43is R1, such that the first rotatable arm set42drives the second rotatable arm43set43to swing reciprocately within a first swinging angle θ1, and the connecting post433of the second rotatable arm set43drives the support rack31and the holding plate60swing back and forth on the base30, thus improving sleeping quality.

As shown inFIG. 7, the adjustment mechanism adjusts the support rack31to swing reciprocately at desired amplitude based on using requirements. For example, the second motor51of the displacement assembly50drives the threaded rod52to rotate, the threaded rod52actuates the moving element53to move toward the lower end of the second rotatable arm set43, such that the first rotatable arm set42is driven to rotate along the eccentric section411of the crank shaft41, and the actuation shaft421of the first rotatable arm set42moves toward the rotary shaft431of the second rotatable arm set43along the guiding groove432of the second rotatable arm set42, hence the distance between the actuation shaft421of the first rotatable arm set42and the rotary shaft431of the second rotatable arm set43is decreased to R2.

As illustrated inFIG. 8, when the first motor401of the first drive source40drives the crank shaft41to rotate, the eccentric section411of the crank shaft41actuates the first rotatable arm set42to swing back and forth, and the actuation shaft421of the first rotatable arm set42drives the second rotatable arm set43to swing reciprocately along the rotary shaft431of the second rotatable arm set43. Due to the maximum swing distance of the first rotatable arm set42is L which is a fixed value, the distance R2between the actuation shaft421of the first rotatable arm set42and the rotary shaft431of the second rotatable arm set43diminishes so that the first rotatable arm set42drives the second rotatable arm set43swings reciprocately within a second swinging angle θ2greater than the first swinging angle θ1, and the connecting post433of the second rotatable arm set43drives the support rack31and the holding plate60to swing reciprocately on the base30within the second swinging angle θ2. Thereby, the adjustment mechanism adjusts the distance R2between the actuation shaft421of the first rotatable arm set42and the rotary shaft431of the second rotatable arm set43so that the first rotatable arm set42drives the second rotatable arm set43to swing reciprocately at a larger amplitude, and the support rack31and the holding plate60are actuated by the third rotatable arm set43to swing reciprocately at the larger amplitude.

With reference toFIG. 9, as desiring to adjust the support rack31to swing reciprocately at a smaller amplitude, the second motor51of the displacement assembly50drives the threaded rod52to revolve so that the threaded rod52actuates the moving element53to move toward the upper end of the second rotatable arm set43, and the second rotatable arm set43drives the actuation shaft421of the first rotatable arm set42to move toward the upper end of the second rotatable arm set43along of the guiding groove432of the second rotatable arm set43, hence the distance between the actuation shaft421of the first rotatable arm set42and the rotary shaft431of the second rotatable arm set43increases to R3. Referring further toFIG. 10, when the first motor401of the first drive source40drives the crank shaft41to rotate, the eccentric section411of the crank shaft41actuates the first rotatable arm set42to swing back and forth, and the actuation shaft421of the first rotatable arm set42drives the second rotatable arm set43to swing reciprocately along the rotary shaft431. Because the maximum swing distance L of the first rotatable arm set42is the fixed value, the distance between the actuation shaft421of the first rotatable arm set42and the rotary shaft431of the second rotatable arm set43increases to R3, hence the first rotatable arm set42actuates the second rotatable arm set43to swing reciprocately at a third swinging angle θ3less than the first swinging angle θ1, and the connecting post433of the second rotatable arm set43drives the support rack31and the holding plate60to swing back and forth on the base30within the third swinging angle θ3less than the first swinging angle θ1. Thereby, the adjustment mechanism adjusts the distance between the actuation shaft421of the first rotatable arm set42and the rotary shaft431of the second rotatable arm set43so that the first rotatable arm set42drives the second rotatable arm set43to swing reciprocately at a smaller amplitude, and the support rack31and the holding plate60are actuated by the third rotatable arm set43to swing reciprocately at the smaller amplitude.