Shaker for Cot, Stroller and Baby Carriage

The invention relates to a shaker for cots, strollers and baby carriages. More particularly, the invention relates to a shaker for cradles, pushchairs, play pens and pendent cradles.

Conventional shakers for baby beds are hidden type shakers which are hidden under a pendent cradle. The shaker has an electric motor which contains an electromagnet as a dynamic power. However, the leakage of electric current may cause sparking and short circuit so that the electric motor and the cradle will be burned. The baby may get an electric shock also.

An object of the invention is to provide a shaker for shaking cots, strollers, cradles, pushchairs, play pens, baby carriages and pendent cradles.

Another object of the invention is to provide a shaker for shaking cots, strollers and baby carriages with safety assurance.

In accordance with the invention, the shaker has a small volume so that the shaker is easily stored. The electric parts of the shaker are carefully protected to avoid electric leakage.

FIG. 1 is an exploded view of a shaker in accordance with the invention;

FIG. 2 is a side, partly cross-sectional view of a preferred embodiment in accordance with the invention;

FIG. 3 is a side plan view of a shaker with a positioning plate;

FIG. 4 is a perspective assembly view of FIG. 1 without the casing;

FIG. 5 illustrates the tightening state of a sucking disc;

FIG. 6 illustrates the loosening state of a sucking disc;

FIG. 7 illustrates the connection of a shaker and a pushchair;

FIG. 8 illustrates the connection of a shaker and a cot;

FIG. 9 illustrates the connection of a shaker and a pendent craddle and;

FIG. 10 illustrates the adjusting holes on the rear link.

Referring to FIGS. 1 and 2, a shaker has a clamping unit, a reciprocating unit, a crank unit and a power unit. The clamping unit has a front jaw 1, a corresponding rear jaw 2, a lever 7 connecting the jaws 1 and 2 and a reciprocating rod 9. A stud 5 which passes through the middle portions of the jaws 1 and 2 are screwed by a nut 6. A pin 3 passes through a generally U-shaped retaining ring 4, near the portion of the rear jaw 2, the upper portion of the lever 7 and the rear portion of the front jaw 1. A screw 8 passes through the lower portion of the lever 7 and the front portion of the reciprocating rod 9. The reciprocating unit has a reciprocating rod 9, a rod sleeve 10 and a sleeve seat 12. The rear portion of the reciprocating rod 9 is inserted in the sleeve 10. A positioning screw 11 passes the front periphery of the sleeve 10 to adjust the length of the rod 9. The rear portion of the sleeve 10 passes through the central hole of the seat 12. Two screws 13 position the seat 12 on a bottom plate 24. The crank unit has a front link 14 and a rear link 19 with a plurality of holes thereon. A pin 15 passes a generally U-shaped retaining ring 16, the rear portion of the sleeve 10 and the front portion of the front link 14. The rear portion of the front link 14 and the front portion of the rear link 19 are connected by a hexagonal screw 17 and a nut 18. The rear portion of the rear link 19 has a blind hole to receive a copper block 22, a PU (polyurethane) ring 21 in order to connect an axle of a retarding motor 23 with a positioning screw 20. The power unit has a retarding motor 23 with an axle. The motor 23 is fixed on the bottom plate 24 by two screws 32.

Referring to FIGS. 3 and 4, four wheels 28 and four sucking discs 26 are disposed under the bottom plate 24. Each wheel 28 is connected to a wheel support 33 which is protruded under the bottom plate 24 via a rivet 34. Each sucking disc 26 is connected to the bottom plate 24 via an adjusting bolt 25. The adjusting bolt 25 can adjust the height of the bottom plate 24. As shown in FIGS. 5 and 6, the packing 27 in the sucking disc 26 is pressed by the bolt 25 so that the interior of the disc 26 is reduced until the disc 26 touches a positioning plate 29 so that the interior of the disc 26 is vacuum. The wheels 28 or the sucking discs 26 can touch the ground or the positioning plate 29. When the sucking discs 26 are adjusted to the position which is lower than the position of the wheels 28, the sucking discs 26 will touch the positioning plate 29. The bottom surface of the positioning plate 29 has a plurality of teeth. The casing 30 covers the shaker except the clamping unit and a portion of the reciprocating unit. Four hexagonal screws 31 at the four corners of the casing 30 position the casing 30 on the bottom plate 24.

Referring to FIG. 10, three holes are formed on the rear link 19 to adjust the length of the rear link 19.

Referring to FIG. 2, the jaws 1 and 2, the lever 7 and the rod 9 can rotate 360.degree., respectively.

Referring to FIGS. 7 to 9, the shaker can shake a pushchair, a cot and a pendent craddle, respectively.