Patent Application
20220073174
This application claims benefit of priority of Italy Application No. 102020000021298, filed Sep. 9, 2020. The above-identified related application is incorporated by reference.
The present invention relates to a buoyancy control device for scuba diving comprising at least two shoulder straps, each shoulder strap having an upper portion and a lower portion joined by a closing buckle comprising a male buckle element and a female buckle element, which has a first connection means for connecting to the upper portion of the shoulder strap and a second connection means for connecting to the male buckle element.
Buoyancy control devices (BCD) have been present on the market for some time as individual accessories for scuba diving used to increase the diver's ability to control the level of depth to be maintained or varied during a dive.
A BCD substantially consists of an expandable bladder, generally made of synthetic materials, worn like a jacket into which air coming from the cylinder is injected, and whose volume is regulated by inflation and deflation valves directly controlled by the diver: the increase or decrease in volume has a direct effect on hydrostatic thrust and therefore helps the diver to maintain or reach the hydrostatic balance required and desired at the various diving depths.
In the forms used, the BCD also has, on the rear dorsal part thereof, systems for securing the compressed air cylinder, as well as other elements for securing other accessories used during diving.
Good wearability of the BCD for the diver and the adherence thereof to the body are thus of extreme importance, both during the preparatory phases prior to the dive and, even more importantly, during the dive itself.
The BCD is worn by the diver like a backpack/vest, with two adjustable shoulder straps and a quick-coupling abdominal closing strap, normally integrated with a superimposable Velcro strap: the importance of the optimal conditions of wearability and comfort that such wearable elements must be able to guarantee in order to ensure the total safety of the diver during the dive is thus clearly evident.
During the inflation and deflation process, the expandable bladder also substantially changes its configuration: the change in size can cause a subsequent tightening or loosening of the constraints of the device around the diver's body, compromising the comfort thereof during the dive.
It is known that in order to remedy this drawback, various buoyancy control devices propose systems for securing the device to the diver's body which have a wide variety of adjustment systems, including systems allowing the relative rotation of reciprocal fastening elements.
It is known that US 5860769 A proposes several solutions in this regard.
As is known, such solutions entail complex, particularly costly materials with a specific design.
There is thus a felt need to simplify the structure of the known buoyancy control devices for scuba diving.
The technical task of the present invention is therefore to provide a buoyancy control device for scuba diving which enables the aforesaid technical drawbacks of the prior art to be eliminated.
Within the scope of this technical task, one object of the invention is to provide a buoyancy control device for scuba diving that comprises at least two shoulder straps, wherein each shoulder strap has two portions joined by a closing buckle that allows the relative rotation of the two portions and uses simple, standard, and inexpensive closure systems.
Another object of the invention is to provide a buoyancy control device wherein the closing buckle of the shoulder straps has optimal characteristics of resistance to the tensile forces acting on the buckle itself.
Yet another object of the invention is to provide a buoyancy control device wherein the closing buckle of the shoulder straps guarantees the possibility of relative rotation of the two portions also under conditions of high tensile forces.
The technical task, as well as these and other objects, according to the present invention are achieved by providing a buoyancy control device for scuba diving comprising at least two shoulder straps, each shoulder strap having an upper portion and a lower portion joined by a closing buckle, said buckle comprising a male buckle element and a female buckle element having a first connection means for connecting to said upper portion of said shoulder strap and a second connection means for connecting to said male buckle element, characterised in that said female buckle element comprises a first part having said first connection means, a second part having said second connection means, and an articulated connection pin for connecting said first part to said second part.
Other features of the present invention are defined, moreover, in the subsequent claims.
Additional features and advantages of the invention will be more apparent from the description of a preferred, but not exclusive embodiment of a buoyancy control device for scuba diving comprising at least two shoulder straps according to the invention, illustrated by way of non-limiting example in the appended drawings, in which:
With reference to the aforementioned figures, they show a buoyancy control device for scuba diving denoted in its entirety by the reference number 1.
The buoyancy control device comprises at least two shoulder straps 100; each shoulder strap 100 has an upper portion 101 and a lower portion 102 joined by a closing buckle 200.
The upper portion 101 and the lower portion 102 of the shoulder strap are typically made of a polymeric material, woven or braided, with characteristics of high tensile strength, typically in a standard width of 50 mm.
The upper portion 101 is generally of a limited length, and is directly fastened at one end to the upper body of the buoyancy control device at the diver's shoulder.
The lower portion 102 is generally the portion of greater length and is fastened at one end to the lower part of the buoyancy control device, directly or through other wearable elements of the device.
The buckle 200 comprises at least one male buckle element 300 and one female buckle element 400.
Advantageously, according to the first preferred embodiment of the present invention, the male buckle element 300 is a known element of a reciprocally elastic fastening system of a fast type, which is widely disseminated, readily available and low-cost.
The male buckle element 300 is fastened to the free end of the lower portion 102 by means of a known connection means, also adjustable, which is not shown in the figures.
Advantageously, according to the first preferred embodiment of the present invention, the female buckle element 400 comprises a first part 500 that comprises a first connection means 501 for connecting to the free end of the upper portion 101 of the shoulder strap 100.
In the present preferred embodiment, the connection means 501 is of a known type and reciprocally secures the first part 500 of the female buckle element 400 to the upper portion 101 of the shoulder strap 100.
The female buckle element 400 comprises a second part 600 that comprises a second connection means 601 for connecting to the male buckle element 300: advantageously, according to the present invention, the second connection means 601 is a known means, with a simple and standardized design, and consistent with a reciprocally elastic fastening system of a fast type, which is widely disseminated, readily available and low-cost.
Advantageously, according to the present invention, the first part 500 and the second part 600 of the female buckle element 400 are connected by means of an articulated connection pin 602.
The articulated connection pin 602 extends along a Z axis which is orthogonal to the main plane in which the female buckle element 400 lies and allows the relative rotation of the first part 500 and the second part 600 in parallel planes, orthogonal to the Z axis.
The articulated connection pin 602 is integral with the second part 600 of the female buckle element 400, and is obtained by monolithic moulding of the second part 600 in a single piece made of polymeric material, preferably acetal resin.
Consistently, the first part 500 is likewise obtained by monolithic moulding in a single piece made of polymeric material, preferably acetal resin.
The articulated connection pin 602 is preferably cylindrical in shape, has a shaft 603 and a head 604 of a larger diameter than the shaft 603, and is of a size consistent with the forced elastic passage of the head 604 in the direction of the Z axis through a circular hole 502 provided in the first part 500, in the area towards the terminal end 520 in a position opposite the first connection means 501.
The circular hole 502 has an axial extension 503 along an axis X coinciding with the longitudinal middle axis of the closing buckle 200 and substantially coinciding with the middle axis of the shoulder strap 100, in the further direction of the terminal end 520 in an opposite position to the first connection means 501.
The axial extension 503 has a size and shape adapted to receive the shaft 603 slidingly towards the abutment 604: the diameter of the shaft 603 is smaller than the transversal dimension of the extension 503 and allows the rotation thereof integrally with the second part 600; the diameter of the head 604 is larger than the transversal dimension of the extension 503 and prevents the extraction thereof in the direction of the Z axis.
Consequently, the first part 500 of the female buckle element 400 is rotatably integral with the second part 600 by means of said articulated connection pin 602.
In accordance with at least one innovative feature of the present invention, the first part 500 and the second part 600 of the female buckle element 400 have cooperating means, respectively 510 and 610, for opposing the tensile forces N of the shoulder strap acting on said female buckle 400.
The cooperating means 510 and 610 are positioned at the ends of the first part 500 opposite the terminal end 520, and at the end of the second part 600 opposite the terminal end 620 near the position of the articulated connection pin 602, along the longitudinal middle axis X.
The cooperating means 510 and 610 for opposing the tensile forces N comprise at least two conjugate lips, respectively a first internal lip 511 on the first part 500 and a second external lip 611 on the second part 600, reciprocally engaged.
The first internal lip 511 and the second external lip 611 extend along a circumferential arc with its centre coinciding with the Z axis of the articulated connection pin 602.
Advantageously, the first internal lip 511 and second external lip 611 remain reciprocally engaged during the relative rotation of the second part 600 with respect to the first part 500 about the Z axis of the articulated connection pin 602.
The second part 600 has two lateral protrusions 605A, 605B that are symmetrical with respect to the longitudinal axis X, and which, in the relative rotation of said second part 600 about the articulated connection pin 602, engage alternately with the lateral walls of the first part 500, limiting the maximum angle of relative rotation A between the first part 500 and the second part 600 to the corresponding circumferential arc on which the conjugate first internal lip 511 and second external lip 611 remain reciprocally engaged.
On the longitudinal axis X, the first part 500 has an upper element 530 projecting over said second part 600 at the cooperating means 510 and 610; the projecting upper element 530 does not prevent the relative rotation of the second part 600 about the articulated connection pin 602, but prevents the exit thereof from the plane of relative rotation and the overturning of the end according to the Z axis, and the consequent disengagement of the first internal lip 511 from the second external lip 611.
Conveniently, the upper element 530 is projecting over the second part 600 up to the maximum angle of relative rotation A with respect to the first part 500 defined by the alternate engagement of the two lateral protrusions 605A, 605B, which are symmetrical with the lateral walls of the first part 500.
The first part 500 also has, on the lower surface opposite the relative sliding surface during rotation of the first part 500 and the second part 600, a plurality of projecting ribs 500i parallel to the X axis and a protrusion 506 enveloping the terminal end 520.
The plurality of ribs 500i and the protrusion 506 constitute a reinforcement of the stiffness and resistance of the first part 500 when it is subjected to the axial action of the tensile forces N at the cooperating means 610 and at the articulated connection pin 602.
The operation of the buoyancy control device for scuba diving according to the invention appears clear from what is described and illustrated and, in particular, is substantially the following.
The male buckle element 300, fastened to the free end of the lower portion 102 of the shoulder strap, is elastically engaged with the connection means 601 of the second part 600 of the female buckle element.
The second part 600 is free to rotate relative to the first part 500 by means of the articulated connection pin 602 engaged in the axial extension 503 of the first part 500.
The upper portion 101 of the shoulder strap 100 is fastened and reciprocally secured by the connection means 501 to the first part 500 of the female buckle element 400.
The tensile forces N acting in an equally and contrary manner on the two portions 101 and 102 of the shoulder strap along the X axis of the closing buckle 200, transfer their load to the buckle 200 at the connection means 601 of the second part 600 and the means 501 of the first part 500.
The loads of the tensile forces are reciprocally transferred from the first part 500 to the second part 600 by means of the articulated connection pin 602.
The articulated connection pin 602 is made of polymeric material, preferably acetal resin.
Whenever the loads of the tensile forces N are particularly high, the elastic deformation of the shaft 603 of the pin 602 will cause a relative sliding of the first part 500 with respect to the second part 600 in a substantially axial deformation along the X axis of the buckle 200.
The relative sliding brings the cooperating means 510 and 610 closer and causes the operative engagement thereof by reciprocally engaging the first internal lip 511 with the second external lip 611 along the entire circumferential arc engaged by the reciprocal rotation of the first part 500 and second part 600.
The large extent of the reciprocally engaged conjugate surfaces of the internal lip 511 and the external lip 611 and the stiffness and resistance of the first part 500 increased by the plurality of ribs 500i and the protrusion 504 enable the transfer, in safety, of the tensile loads N, also considerable ones, between the first part 500 and the second part 600 of the female buckle element 400 of the closing buckle 200, without preventing the reciprocal rotation thereof.
In practical terms, it has been observed that a buoyancy control device according to the invention is particularly advantageous due to the possibility that the closing buckle may allow the relative rotation of the two portions and use simple, standard, and low-cost closure systems.
A buoyancy control device according to the invention is particularly advantageous, moreover, since the closing buckle of the shoulder straps has good characteristics of resistance to the tensile forces acting on the buckle itself.
A buoyancy control device thus conceived is susceptible of numerous modifications and variants, all falling within the scope of the inventive concept as defined by the subsequent claims.
Furthermore, all of the details are replaceable by technically equivalent elements.
The materials used, as well as the dimensions, may in practice be any whatsoever, according to needs and the state of the art.
| Number | Date | Country | Kind |
|---|---|---|---|
| 102020000021298 | Sep 2020 | IT | national |
