Exercise devices – Involving user translation or physical simulation thereof – Occupant propelled support frame having movement...
Reexamination Certificate
2000-06-19
2001-10-23
Crow, Stephen R. (Department: 3764)
Exercise devices
Involving user translation or physical simulation thereof
Occupant propelled support frame having movement...
24, C280S647000, C280S649000
Reexamination Certificate
active
06306066
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a safety-control device of height adjustment for a baby walker, more particularly to a safety-control device which can be conveniently operated by one hand to adjust the height and fix the position of the upper plate of a baby walker so as to prevent a baby in the baby walker from being hurt by the rapid fall of the upper plate.
2. Description of the Related Arts
Referring to
FIG. 1
, a baby walker is generally composed by a base frame
10
, a supporting skeleton
20
and an upper plate
30
. The height of the upper plate
30
can be adjusted according to the height of a baby carried in the baby walker. A conventional height-adjusting device for a baby walker is disposed between the bottom of the upper plate
30
and the supporting skeleton
20
. The conventional height-adjusting device includes a positioning board
40
, a slidable retaining member
50
and a pressing board
60
.
Referring to
FIGS. 2 and 3
, the positioning board
40
is provided to secure to the bottom of the upper plate
30
. The positioning board
40
is integrately made of plastic, and a reinforce board
401
is provided on the top surface of the positioning board
40
to add intensity. In both ends of the positioning board
40
are respectively provided with long holes
402
for screws to penetrate through so as to secure the positioning board
40
to the bottom of the upper plate
30
. Several hollow blocks
403
are provided in equal distances on the reinforce board
401
. In the top surface of each hollow block
403
is provided with a passing hole
404
for a screw
405
to penetrate through to screw each hollow block
403
to the bottom of the upper plate
30
so as to make the positioning board
40
be firmly secured to the bottom of the upper plate
30
, as shown in FIG.
3
. On the top surface of each hollow block
403
and in accordance with each passing hole
404
is provided with an annulus
406
so as to make each screw
405
be firmly screwed to the bottom of the upper plate
30
by the close attachment of each annulus
406
. A slant surface
407
is provided on one side of each hollow block
403
.
The slidable retaining member
50
is provided to mount on the supporting skeleton
20
, and the pressing board
60
is pivotally provided on the slidable retaining member
50
. When the pressing board
60
being pressed, the slidable retaining member
50
can be released to choose any one of the hollow blocks
403
to adjust the height of the supporting skeleton
20
as well as the upper plate
30
. After the pressing board
60
being released, the slidable retaining member
50
will be caught and fixed in the chosen hollow block
403
. When the pressing board
60
being pressed again, the slidable retaining member
50
can move out the hollow block
403
from the slant surface
407
to choose another hollow block
403
to be caught in so as to adjust the height of the supporting skeleton
20
as well as the upper plate
30
.
Although the height of the baby walker with the above-mentioned conventional height-adjusting device can be easily adjusted, it is easy for the baby carried in the walker or another baby to happen to press the pressing board
60
to make the slidable retaining member
50
depart from one of the hollow blocks
403
and loose the function of fixing. Consequently, the upper plate
30
will fall down rapidly, the baby in the baby walker will be frightened and even hurt.
SUMMARY OF THE INVENTION
In view of the drawback of the prior art mentioned above, an objective of this invention is to provide a safety-control device of height adjustment for a baby walker which can be easily operated by one hand to adjust the height and fix the position of the upper plate of the baby walker so as to prevent a baby from being frightened and hurt by the rapid fall of the upper plate.
Accordingly, a safety-control device of height adjustment for a baby walker in the present invention includes two opposite planks, a main body and a pressing board. The main body is provided with a lateral opening in the front wall for receiving an elastic article and a stopping button. In the top of the main body is provided with an upper room for the elastic article and the stopping button and an operating block to be placed in. The lower section of the operating block is placed in the hollow of the stopping button, and a fixing pin is used to penetrate through the passing holes of the main body and the long hole of the operating block so as to make the operating block be pivotally assembled with the main body. The operating block can be operated by one finger to make the stopping button be withdrawn inward for the pressing board to be moved by another finger at the same time so as for the pressing board and the main body as well as the supporting skeleton being shifted together to choose one of the ratchets on the two planks provided in the bottom of the upper plate for the catch portion to catch and fix. When the operating block being released, the stopping button will protrude outward by the elasticity of the elastic article to stop against the pressing board again. Thus, the safety-control device can adjust the height and fix the position of the upper plate so as to prevent the upper plate from rapidly falling down by the accident press of the pressing board.
REFERENCES:
patent: 4759541 (1988-07-01), Chen
patent: 5324064 (1994-06-01), Sumser et al.
patent: 5351978 (1994-10-01), Chen
patent: 5447319 (1995-09-01), Huang
patent: 5820527 (1998-10-01), Lai
Crow Stephen R.
Rosenberg , Klein & Lee
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