Music – Instruments – Automatic
Reexamination Certificate
2003-04-15
2004-03-02
Lockett, Kimberly (Department: 2837)
Music
Instruments
Automatic
Reexamination Certificate
active
06700042
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the invention
The invention about the improvement structure of spring driving musical movement, especially refer to the set-up on the musical base, and mount a speed reducer which is formed as one on the down side of the base, assemble together in the
shape cylinder cover of the spring cover, this is the new structure of the musical movement.
2. Description of the Prior Art
Usually, the principal constructive features of the structure of the spring driving Musical movement are: the structure show as in
FIG. 1
, which with single support frame but apart from spring cover; the construction of the support frame set is combined by a step spur gear
12
which drives a bilateral gear
13
, meanwhile a worm
14
which mounted a windage case which can be used as switch brake
15
on the top, on the most top has a frictionized set
16
and support frame
17
.
When rotate the spring of the musical movement tightly, the worm
14
will rotate clockwise by the transmission of the gear, at the same time the windage set which can be used as switch brake
15
will rotate too, meanwhile two wings of the windage set which can be used as switch brake will open and fly up and rotate, but two convex points
18
of upper side of the windage which can be used as switch brake will frictionize the down edge of the friction set
16
, will get the purpose of reducing speed. The defects of this kind of structure are
(1) There have four components of the speed reducer set, the material cost is high and waste time to assemble.
(2) After mounting step spur gear
12
into support frame
17
must rivet the shaft bracket
19
of the support step spur gear to fix spur gear
12
by processing way, will waste work time.
(3) The windage set which can be used as switch brake
15
is easy to deform, the convex
18
on the windage set which can be used as switch brake and the frictionized set
16
will produce noise by the unbalance rotational friction.
When every windage set which can be used as switch brake
15
of the musical movement combine with the worm
14
, the position is hard to locate; if the position of the windage set which can be used as switch brake
15
is too high, when musical movement play, because of two wings of the windage set which can be used as switch brake will open to rotate, the friction resistance of convex point
18
and frictionized set
16
will be too large, it will cause the playing speed of the musical movement too slow; when the position of the windage which can be used as switch brake is too low, the friction resistance between convex point
18
and frictionized set
16
will be too small, it will cause the playing speed of the musical movement too fast;
So, if want this type of musical movement in assemble process play music in normal speed, it must check the play speed one by one, and most of all must adjust the position of the windage set which can be used as switch brake
15
suitably, it will waste large of assembly work time; and if user touch the windage which can be used as switch brake
15
carelessly, the position will move, cause the playing speed of the musical movement is not good; and when fixing the step spur gear
12
in the support frame
11
must rivet the shaft bracket
19
of support step spur gear by processing, it will waste assembly work time and when processing will easy to produce variables, make the structure to produce disorder.
As
FIG. 2
shows another kind of musical movement structure, which assemble by the extended part of spring cover; the speed reducer is composed of a worm
21
, therein assemble a windage which can be used as switch brake
22
, put the low shaft end of the worm
21
of this speed reducer set into the locating hole
23
of the worm of the musical movement base, mount the bilateral gear
24
and step spur gear
25
in musical movement base
26
, then cover the spring cover
27
, the extended shaft
28
of spring cover
27
can suit to compress a step spur gear
25
, meanwhile, the up end of the shaft of the worm
21
lead to the locating hole of the worm of the spring cover's extended part, the down end of the shaft mount to the down side locating hole of the worm
21
of the base, and then rivet spring cover
27
with base. Compare this kind of speed reducer structure with the speed reducer structure shows in
FIG. 1
, the merits and defects are:
(1) The components of the speed reducer set are only two pieces, compare it with the structure of
FIG. 1
, the material cost is low.
(2) The step spur gear
25
must be fixed by the extended shaft
28
of the spring cover
27
, it will affect the model, break the beautiful view of the whole.
(3) The locating hole set of the worm locating hole
23
on musical movement base
26
is flat, adding lubricant oil is finite and easy to flow out, it will affect the configuration.
(4) The windage which can be used as switch brake
22
has the same form as show in
FIG. 1
, it easy to deform, the defect of leading unbalance rotating friction to produce noise is the same of the form in FIG.
1
.
(5) The defect of hard to locating alignment of assemble the windage which can be used as switch brake
22
of every musical movement with worm
21
leading to the problem of adjustment and stability of playing speed is the same problem mentioned in the type of FIG.
1
.
Another type of speed reducer structure of spring driving musical movement as shows in
FIG. 3
, its structure is similar to the type of
FIG. 1
, with single support frame but apart from spring cover. The step spur gear
33
of the support frame set
31
is assembled in the same way as
FIG. 1
, the difference is the structure of speed reducer, the components increase from four to five pieces, windage set change to friction set
34
, and is independent of switch brake
35
. The shape of friction set
34
is 3-claws circular, the frictionized set is
shape cylinder
36
, the way of reduce speed is by the lateral side of the friction set open and rotate parallel to frictionize with the interior side of the
shape cylinder, it is differ from FIG.
1
and
FIG. 2
frictionize upper side.
The components of the speed reducer on the musical movement structure are, a screw
37
, assemble the switch brake
35
close fit into the top of worm of screw
37
, then assemble a 3-claws circular friction set
34
, mount the 3-claws circular friction set of the speed reducer set into the
shape cylinder cover
36
which is combined with support frame
32
, the down end of the shaft of the screw
37
is mounted on the predict locating body of the worm of the support frame. Comparing this type of speed reducer construction with the type show in
FIG. 1
and
FIG. 2
the merits and defects are:
(1) The components of the speed reducer set have 5 pieces, material cost is the highest, the components in assembly is the most, waste time to assemble.
(2) When mount step spur gear
33
on the support frame
32
, need rivet support frame
32
by processing to fix the spur gear
33
, will waste work time.
(3) The locating of 3-claws circular friction set is decided by the precision of the switch brake locating, the defect of every musical movement hard to locate is the same as in the types of FIG.
1
and FIG.
2
.
Although the friction way of friction set and
shape cylinder is laterial parallel opening rotary friction, but the form of the friction set is 3-claws, multiple points friction, it is hard to balance consistently, although the noise is less than the type in FIG.
1
and
FIG. 2
, but it is still hard to get ideal effect.
(4) The design of 3-claws circular friction set can't combine with switch brake to form in one.
So, we can see, the conventionally used musical movement structure, no matter how considering the cost or quality there still have many defects, they are not good design, must be improved.
The inventor of this case saw the defects of the conventionally used structure of spring driving musical movement, want to improve them by his mind, after long time research, finally invent this new desig
Apex Juris pllc
Heims Tracy M
Kyooh Precision Industry Co., Ltd.
Lockett Kimberly
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