[0001] The present invention refers to the field of gold and jewellery products and more
specifically it concerns an elastic "tennis" bracelet.
[0002] So called "tennis" bracelets are conventionally made up of a diamond
rivière with brilliant cut mounted in a setting (typically made from white gold) for the
entire length of the bracelet itself, thus defining a linear continuity of stones.
The setting is formed from a concatenation of alternating female elements (collets
or prong settings) and male elements engaged with one another so that the bracelet
is sufficiently flexible as to allow it to be worn loosely on the wrist of the user;
i.e. when the user has his/her arm stretched in front with the palm of the hand facing
downwards, the bracelet rests on the back of the wrist hangs below the palm. Variants
have also been developed with respect to the tennis bracelet described above that
make use of precious stones different from diamonds or even variants of jewellery
made from cheaper materials.
[0003] The tennis bracelet is highly appreciated for its neatness, simplicity and comfortable
fit, characteristics that make the jewellery item particularly elegant.
[0004] The aforementioned neatness of the conventional tennis bracelet is spoiled by the
presence of a clasp that allows the bracelet to be opened (or closed) and thus be
worn (or taken off). Such an opening, as well as creating an unattractive discontinuity
in the bracelet, brings an increase in production costs; moreover, it is frequently
subject to breaking or damage. The clasp is also often difficult to operate for a
single user that has to wear (or take off) the bracelet, and therefore the bracelet
is particularly uncomfortable to put on (or take off).
[0005] In order to at least partially solve such drawbacks, alternative solutions have been
considered. Among these, there are known solutions that provide a concatenation of
collets (also called prong setting) joined by elastic elements, so as to thus obtain
an elastic or extensible bracelet that can be worn or removed by simply stretching
it out (i.e. by moving the collets away from one another). However, such known extensible
bracelets also have numerous drawbacks.
[0006] Firstly, they do not ensure a fit comparable to that of the conventional tennis bracelet,
and therefore they are of lower quality in terms of appearance; this should be considered
an aspect of primary importance given that elegance and the specific fit are, as already
mentioned, special characteristics of the conventional tennis bracelet.
[0007] Specifically, the presence of the elastic elements tends to stiffen the bracelet
that thus keeps a substantially circular shape even when worn, therefore not hanging
from the wrist and not ensuring this loose fit that is so appreciated in the conventional
tennis bracelet.
[0008] Known elastic solutions thus substantially aesthetically differ from the conventional
tennis bracelet and are consequently not appreciated by the user who does not see
such variants as a valid alternative to the conventional tennis bracelet.
[0009] The purpose of the present invention is therefore to provide a tennis bracelet that
is elastic but at the same time is comparable in terms of fit, elegance and appearance
to a conventional tennis bracelet.
[0010] Another purpose of the present invention is to provide a tennis bracelet that is
easy to put on and take off.
[0011] This purpose is achieved with the bracelet according to the present invention the
essential characteristics of which are defined in the first of the attached claims.
[0012] The invention will now be illustrated in greater detail with the following description
of an embodiment thereof, given as a non-limiting example, with reference to the attached
drawings, in which:
- figure 1 is a perspective view of a segment of bracelet according to the invention,
wherein a portion of the segment of the bracelet is in an extended configuration,
and a portion is in a non-extended configuration;
- figure 2 is a perspective view from below of the segment of figure 1;
- figure 3 shows an exploded view of a section of the bracelet of the previous figures;
- figure 4 is a plan view representation of the bracelet of the previous figures with
groups of different collets represented in different shades; and
- figure 5 is a view of the bracelet of figure 4 in which just two groups of different
collets are represented, with side walls having a different inclination to one another.
[0013] With reference to the aforementioned figures, the bracelet according to the invention
comprises a plurality of female elements or collets 1, 1' and male elements 2 linked
together so as to form a linear structure developing along a direction of concatenation,
in which the female elements 1, 1' are in an alternate position with the male elements
2. The female elements are box-shaped, i.e. internally hollow, whereas the male elements
are tubular to allow the penetration of elastic means, such as a spring 3 that connects
the female elements with the male elements indeed defining the aforementioned elastic
bracelet.
[0014] The collets 1, 1' are polygonal-shaped and in particular they have a substantially
trapezoidal cross section. They have at least one face 1a suitable for allowing a
stone 4 to be mounted, in a known manner. From the mounting face 1a some side walls
1c, 1d extend, the free edges of which define, in a position opposite the face 1a
itself, an opening 1b of the collet suitable for allowing the insertion of the male
elements.
[0015] In detail, the side walls comprise opposite top side walls 1d substantially parallel
to the direction of concatenation (defined by the male elements and by the spring)
and opposite and mutually inclined side walls 1c. The top walls 1d are slightly curved
(or rounded towards the outside of the collet) and define, with the top walls of the
adjacent collets, the flanks of the bracelet exposed to sight of the user. As mentioned,
the side walls 1c, on the other hand, are mutually inclined to define the aforementioned
trapezoidal section and are in contact, when the bracelet is in relaxed configuration,
i.e. not extended, with the side walls of the adjacent collets.
[0016] On the side walls 1c there are substantially rectangular open polygonal seats 10
of dimensions such as to allow the insertion of the male elements 2. The polygonal
seats extend from free edges 1c' of the respective side walls, representing an interruption
thereof, up to the mounting face.
[0017] In order to avoid the mutual rotation movement between collet and male element around
the direction/axis of concatenation, the male elements have a polygonal profile corresponding
to that of the seat 10. In particular, the male elements have a substantially square
cross section; they have a body 20 with a constant square section the ends of which
21 are enlarged. The polygonal seats 10 have a thickness that is comparable to the
width of the body 20, whereas the enlarged ends 21 have increased width.
[0018] As mentioned, each male element 2 is slidably connected to two successive female
elements 1; when the bracelet is extended the enlarged ends 21 abut internally on
the side walls 1c in such a way defining an end stop against the opening out of the
bracelet. In relaxed configuration, on the other hand, the enlarged ends 21 of the
two male elements 2 connected to the same collet 1, are alongside one another, close
together if not in abutment. Advantageously, the maximum stretching out allowed by
the abutments of the enlarged ends of the male elements 2 with the collets 1 is lower
than the elastic limit of the elastic element 3 and therefore there is no risk of
weakening thereof.
[0019] In order to prevent the male elements 2 from coming out from the respective polygonal
seats 20 they are shut at the bottom by block means such as plates 5 that close the
aforementioned opening 1b and the seats 10 themselves; when fixedly connected to the
collet therefore, the plate defines a lower face 1b' of the same collet, opposite
the mounting face 1a.
[0020] Peripherally a stepped groove 11 is formed at the opening 1b, on the side walls 1c,
1d, for abutment by the plate. The latter is finally fixed to the collet in a known
way like for example by welding, gluing, etc..
[0021] In order to make it more easily wearable, the bracelet is substantially elliptical
or oval in shape, a shape which indeed allows the bracelet to adapt to the wrist of
the user wearing it loosely, i.e. resting on the back of the wrist itself. Such a
shape is given by the presence on the concatenation of two different types of collet,
i.e. a first collet 1 and a second collet 1' that differs from the first only in that
it provides side walls 1c' having an increased mutual inclination. In particular,
in the preferred embodiment, the side walls 1c' define an angle β that is about 2
degrees wider than the angle α defined by the side walls of the first collets 1. In
a possible configuration, the angle α is comprised between 4 and 5 degrees, whereas
β is comprised between 6 and 7 degrees.
[0022] The number of second collets 1' is variable; preferably, such a number is substantially
analogous or in any case slightly less than that of the first collets 1; the second
collets 1' will therefore be inserted in the concatenation so as to form two diametrically
opposite groups spaced apart by as many groups of collets 1.
[0023] The bracelet according to the invention can be easily opened out by applying a traction
force along its axis of concatenation to stretch the elastic element 3. The opening
out of the bracelet is sufficient to allow the user to put the bracelet itself on
their wrist by passing their hand through it. Then by allowing the elastic element
to go back into its contracted condition, the bracelet narrows to a size sufficient
to ensure that it does not come off the wrist involuntarily and, at the same time,
ensuring a stable uniformity of appearance of the concatenation.
[0024] Thanks to the matching shape of seats and male elements, which prevents the rotation
of the collets with respect to the male elements themselves, the collets stay in the
desired position, i.e. with the mounting face 1a facing towards the outside of the
bracelet. This solution is particularly advantageous in tennis bracelets in which
the mounted stones must be clearly visible.
[0025] Moreover, the closure plates 5 define a substantially neat and smooth inner surface
of the bracelet which is particularly appreciated while being worn in contact with
the skin of the wrist.
[0026] The particular configuration of the oval bracelet, thanks to the presence of collets
having trapezoidal section, allows the bracelet to be worn loosely, so that it rests
on the wrist.
[0027] The bracelet according to the invention is thus comparable to a conventional tennis
bracelet in terms of fit, linearity and aesthetics, whilst solving its drawbacks,
i.e. eliminating the presence of the closure.
[0028] The bracelet according to the invention will thus be easy for the user to put on
(or take of), also without the help of other people. At the same time, the bracelet
defines a real continuity of stones, since there are no discontinuities or interruptions.
[0029] Furthermore, the bracelet according to the invention is aesthetically pleasing since,
thanks to the presence of the spring that keeps the collets stuck together, the stones
are always the same distance apart, even when the bracelet is being worn. By adjusting
the thicknesses of the collets it is also possible to adjust the distance between
the stones.
[0030] It will be obvious to a man skilled in the art that the shape of the female elements
can be different from the one illustrated and that it is possible to use precious
and non-precious metals for the production of such elements, just as it is possible
to provide the use of precious and non-precious stones or, possibly, there can even
be solutions in which the collets do not support any stone; it is also possible to
foresee solutions with alternations of stones and collets etc..
[0031] Furthermore, the female elements can have more than four vertical walls, thus having
any prismatic shape; the only condition is that they must have at least two diametrically
opposite side walls, to ensure the mutual abutment of the collets with the bracelet
not tightened. Similarly, each male element and the respective seat can have different
shapes from the one described, provided that they can engage together so as not to
be rotatable with respect to the axis of concatenation of the bracelet. The male element
and the seat can therefore have any polygonal shape (regular and not).
[0032] It is also possible to make various alternations or combinations of female elements
in different metals or in the same metal but in different chromatic grades. Moreover,
it is possible to use female elements characterised by specific processing and/or
surface treatments that are well known by the man skilled in the art. All of these
variant embodiments and other equivalent ones are covered by the scope of protection
of the invention.
[0033] The present invention has been so far described with reference to preferred embodiments.
It should be understood that there can be other embodiments falling within the same
inventive concept, as defined by the scope of protection of the following claims.
1. A bracelet comprising an annular concatenation of a plurality of alternating female
elements (1) and male elements (2), said male elements having enlarged ends (21) slidably
engaged in two adjacent female elements (1), said male elements being tubular to allow
the insertion of an elastic element (3) that extends in said concatenation to keep
said female elements close together with the adjacent one, said female elements also
being adapted to be moved apart from one another following an axial force suitable
for extending said elastic element (3), said bracelet being characterised in that said female elements (1) have at least two side walls (1c) inclined to one another
to define a first angle (α), on which polygonal seats (10) are formed for the engagement
of said male elements (2), the latter having a shape matching said seats so as to
define a non-rotary engagement between said male elements themselves and said female
elements, said bracelet also having, in a diametrically opposite position on said
concatenation, at least two second female elements (1') having side walls inclined
to one another to define a second angle (β) that is greater than said first angle
(α) in order to give said bracelet a substantially oval or elliptical shape.
2. The bracelet according to claim 1, wherein said female elements (1) are polygonal
box-shaped and provide at least one face (1a) suitable for mounting a stone, such
a face (1a) facing towards the outside of the bracelet.
3. The bracelet according to claim 2, wherein from said mounting face a plurality of
side walls (1c, 1d) extend perpendicularly, of which two opposite ones are said side
walls, said side walls defining, in a position opposite said face, an opening (1b)
suitable for the insertion of said male element.
4. The bracelet according to claim 3, wherein said opening and at the bottom said seats
(10) are intercepted by a closing plate (5) that prevents the accidental extraction
of said male elements, said plate being parallel and opposite to said mounting face.
5. The bracelet according to claim 4, wherein a stepped groove (11) is formed in said
side walls perimetrically to said opening, said plate resting in abutment on said
groove.
6. The bracelet according to any one of claims 3 to 5, wherein said side walls comprise
two opposite top walls (1d) arranged parallel to said male elements suitable for defining
the flanks of said bracelet, said top walls being curved.
7. The bracelet according to any one of the previous claims, wherein said male elements
have a body (20) of size such as to penetrate said seat (20), said enlarged ends having
increased dimensions with respect to said body so that when said elastic element is
extended, said enlarged ends abut internally on said side walls.
8. The bracelet according to claim 7, wherein said body (20) has a square cross section,
said seats being substantially rectangular.
9. The bracelet according to any of the previous claims, wherein said second angle (β)
is greater than said first angle (α) by about 2°.
10. The bracelet according to claim 9, wherein said first angle (α) is comprised between
4 and 5 degrees and said second angle (β) is comprised between 6 and 7 degrees.
11. The bracelet according to any of the previous claims, wherein said elastic element
is a coil spring.