WO2014012647A1 - Device to induce an oscillatory movement - Google Patents
Device to induce an oscillatory movement Download PDFInfo
- Publication number
- WO2014012647A1 WO2014012647A1 PCT/EP2013/002090 EP2013002090W WO2014012647A1 WO 2014012647 A1 WO2014012647 A1 WO 2014012647A1 EP 2013002090 W EP2013002090 W EP 2013002090W WO 2014012647 A1 WO2014012647 A1 WO 2014012647A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wheel
- profile
- internal
- vehicle
- tread
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
- B62B9/22—Devices for rocking or oscillating
Abstract
Device applied to the tread of one or more wheels of a vehicle to induce an oscillatory movement to the vehicle itself, comprising a concave internal profile (2) having a constant curvature in the plane of the wheel for receiving the wheel itself and an external profile (1) of substantially convex shape and of variable curvature in the plane of the wheel, so that by turning said wheel in contact with the ground, the axis of the wheel to which the device is applied swings vertically causing the said oscillatory movement.
Description
DEVICE TO INDUCE AN OSCILLATORY MOVEMENT DESCRIPTION OF THE INVENTION
Field of the art to which the invention refers to
It is known that children, especially when they are very young, love to be rocked and swung. Rocking a child, in fact, helps him to calm down, to relax and to fall asleep. Swinging a child who is in her arms, in a pram or in the bed, makes him feel safe and secure, allows him to rest peacefully. The most traditional way to rock a child is no doubt, to keep him in her arms, rocking back and forth. However, it is desirable to be able to swing and rock the baby even when the child is in a stroller or in a pram, to allow the person who takes care of him to be able to carry out other activities.
State of the prior art
Different devices, to be applied to strollers and prams, are known for rocking children and infants. Often, however, such devices are not easy to use, are not portable, while the need for a rocking device is most frequent away from home. Sometimes these devices require an electric motor, or significant changes to the stroller. See for example the devices described in GB2219199, WO2004/062977, WO2005/005226, US2008/0314665 or in EP2418140. Despite the strollers and prams today are very sophisticated in many features, the need for a device which allows to swing the stroller or pram and does not have the disadvantages of the known devices, remains. The present invention therefore wants to provide a device reliable, silent, portable, having a very simple structure, which allows to induce an oscillatory movement, ideal for swinging or rocking a baby in a stroller or a pram.
Summary of the invention
The present invention is relevant to a device to be applied to the tread of one or more wheels of a vehicle to induce an oscillatory movement, comprising a concave internal profile having a constant curvature in the plane of the wheel for receiving the wheel; and a substantially convex external profile having a variable curvature in the plane of the wheel.
Preferably the angle between the tangent to the outer circumference of the wheel and the tangent to the external profile of the device, where these are touching is less than 30°.
According to a preferred embodiment of the invention, the internal profile defines a substantially circular cavity suitable to receive the wheel, an inner circumference, and the outer profile defines a closed perimeter with dimensions bigger than the inner circumference.
Preferably the inner circumference of the profile has a diameter equal to D-x, where D is the outer diameter of the tread of the wheel on which the device is applied and x is the diametrical interference required to generate the frictional force necessary to maintain the internal circumference integral with the tread of the wheel.
According to an embodiment of the invention, the inner circumference has a diameter equal to D and x is equal to zero. Preferably the outer profile is convex with no cusps or discontinuities. Preferably, the outer profile is an ellipse.
According to a preferred embodiment of the invention the distance of the center of gravity of the perimeter of the outer profile of the device with respect to the center of the circular inner cavity is equal to 0, in other words the center of the internal circular cavity coincides with the center of gravity of
the outer profile. The device can additionally comprise means to secure the device itself to the wheel on which it is applied, preferably elastic strips connected to the external sides of the device.
Alternatively, the means to secure the device to the wheel can comprise a sliding track connected to the external side of the device. The device is preferably made of a material having an elastic modulus or Young's modulus between 2xl09 Pa and 2xl07 Pa, preferably between 8xl08 Pa e 8xl07 Pa. Preferably the device is made of rubber or similar material.
The present invention also relates to the use of the above mentioned device to induce an oscillatory movement to a vehicle with wheels, preferably a stroller or a pram. Subject of the invention is also a kit comprising a stroller or a pram and at least one device of the invention. The device and/or the kit can additionally comprise means to secure the device to the wheel on which it is applied.
Description of the drawings
Figure 0 shows a generic device: (0) radius of curvature of the inner profile, (1) external profile of the device, (2) internal profile of the device, (3) center of the curvature of the inner profile.
Figure 1 shows an embodiment of the device with the internal profile that defines a substantially circular cavity suitable to receive the wheel and with the external profile that defines a closed perimeter with dimensions bigger than the internal circumference: (1) external profile of the device, (2) internal profile of the device that forms an internal circumference, (3) center of the internal circumference, (4) center of gravity of the external profile, (5) distance between (3) and (4), (6) diameter of the inner circumference.
Figure 2 shows an embodiment of the device applied to a wheel that rolling passes from position (10) to position (11): (1) external profile of the device, (3) center of the internal circumference that coincides with the axis of the wheel to which the device is applied, (4) center of gravity of the external profile, (7) vertical movement of (3) generated by the change of position. Figure 3 shows the angular oscillation of the longitudinal axis that links two wheels generated by the rolling of Figure 2: (3) axis of the wheel to which the device is applied, (8) axis of the wheel to which the device is not applied, (9) oscillation of the perpendicular to the longitudinal axis between the two wheels.
Figure 4 shows the angular oscillation of the transverse axis that links two wheels generated by the rolling of Figure 2: (3) axis of the wheel to which the device is applied, (13) axis of the wheel to which the device is not applied, (12) oscillation of the perpendicular to the axis that transversely joins the two wheels.
Figure 5 shows the oscillation of the center of two wheels transversely opposed, on which two devices with angular displacement of 90° are applied, that rolling pass from position (14) to position (15): (12) oscillation of the perpendicular to the axis that links transversely two wheels, (7) vertical oscillation of the axis of the wheel.
Figure 6 shows the angular displacement (16) between two devices.
Figure 7 shows a wheel in which the profile of the tread is modified by applying two devices according to one embodiment of the invention: (1) external profile of the device, (2) outer circumference of the wheel that fits with the internal profiles of the devices, (17) angle between the tangent to the
circumference of the tread of the wheel and the tangent to the external profile of the device in the point of contact.
Figure 8 shows a device with an elliptical external profile, the inner circumference is not concentric with respect to the center of gravity of the external profile.
Figure 9 shows an embodiment of the invention with elliptical external profile, the inner circumference (6) concentric with respect to the external profile and the inner circumference shaped convex in the sense of the axis of rotation of the wheel to which it will be applied, sec. A-A, sec. B-B.
Figure 10 shows an embodiment of the invention in which one or two devices are applied to a wheel, with an angle between the tangent to the outer circumference of the wheel and the tangent to the external profile of the device in the contact point that is equal to 0, with the inner circumference (6) = D and with the inner circumference shaped convex in the sense of the axis of rotation of the wheel to which it is applied sec. A-A.
Figure 11 shows the fastening of a device to a wheel by means of elastic strips: (18) fixing pin, (19) elastic strip, (20) device, (21) wheel to which the device is applied, (22) fixing velcro.
Figure 12 shows the fastening of two devices to a wheel by a sliding track: (23) wheel to which the devices are applied, (24) devices, (25) sliding track with an inner slot that allows the movement of the devices, (26) sliding pins fixed to the devices that make the devices integral with the track and can slide in the slot, (27) elastic clamping cord applied to a sliding pin of each device. Figure 13 shows how the two devices fixed by the sliding track can move away from each other to be removed from the wheel to which they are
applied.
Description of the invention
The invention consists in applying to the tread of one or more wheels of a vehicle, such as a stroller or a pram, a device capable to modify the profile of the tread in the plane of the wheel so that it is not any more circular, the device represented in Figure 0 includes a concave internal profile 2 of constant curvature 0 suitable to receive the wheel and an external profile 1 of substantially convex shape and of variable curvature.
In Figures 1 and 2 is shown an embodiment of the invention where the internal profile defines a substantially circular cavity suitable to receive the wheel, an internal circumference 2, and the external profile defines a closed perimeter with bigger dimensions than the internal circumference 1. In such an embodiment the center of gravity of the external profile 4 does not coincide with the center of the internal circumference 3. Figure 2 shows in particular how, with the profile of the tread so modified, even slightly pushing the vehicle and making the wheels turn, the axis of the wheel to which the device is applied, which coincides with the center of the inner circumference, oscillates vertically generating:
- a vertical oscillatory movement 7,
- an angular oscillatory movement in the longitudinal direction 9 as shown in Figure 3,
- an angular oscillatory movement in the transverse direction 12 as shown in Figure 4, useful for example to cradle a child or infant in a stroller or a pram. The characteristics of the oscillation (amplitude and frequency) are in function of the speed to which the vehicle is pushed, the shape of the outer
profile of the device, the position of the center of gravity of the outer profile relative to the axis of rotation of the wheel, the application of the device to one single or more wheels, application of different devices to different wheels, angular displacement of the outer perimeter of a device applied to wheel with respect to the outer perimeter of another device applied to another wheel.
Preferably, the distance between the center of gravity of the outer profile relative to the axis of the wheel 5 is equal to 0 since the misalignment of the axis of the wheel and the center of gravity of the outer profile of the device induces an oscillatory component that does not influence significantly the substance and the effectiveness of the final oscillatory motion.
The device is to be applied to at least one wheel, in case it is applied to two wheels these will be preferably on opposite transversal sides of the vehicle as shown for example in Figure 5.
The application of more devices with different profiles to the same vehicle, although possible, does not significantly affect the effectiveness of the oscillatory movement. Preferably, the angular displacement of the outer profile of a device applied to the tread of a wheel with respect to that applied to the tread of another wheel on opposite transverse side is 90° as shown for example in Figure 5 and Figure 6 (16 = +90°, 16 = -90°).
In order to obtain a fluid oscillation of the vehicle, the external profile 1 is preferably convex and with no cusps or discontinuities. In the points where the external profile of the device touches the outer profile of the wheel, the angle between the tangent to the outer circumference of the wheel and the tangent to the external profile of the device at the point of contact 17 is
preferably equal to or less than 30 °, preferably is equal to 0.
Preferably, the external profile of the device has an elliptical shape as shown in Figure 8 and Figure 9. The internal circular cavity can be concentric or not to the external profile.
Figure 9 shows a specific embodiment of the invention in which the device is made by a device having an external profile of elliptical shape with a circular internal cavity concentric with respect to the external profile.
In correspondence of the cavity, the internal circumference has in the plane perpendicular to the wheel a convex profile such as to adhere to the outer profile of the tread of the wheel (section A-A/B-B). The dimensions of the cavity are in function of the outer diameter D of the tread of the wheel to which the device is applied with the following dimensions: Diameter cavity = D-x (6).
In the formula, x is the diametrical interference necessary to generate the friction force required to maintain the internal circumference of the device integral with the tread of the wheel. This interference is calculated with the applicable physical-mathematical formulas in function of the torque that is to be transmitted, the coefficient of friction between the tread of the wheel and the internal surface of contact of the device, the size of the wheel and of the device and of the coefficient of elasticity of the materials affected by the coupling.
In order to apply the device, it is sufficient to expand the internal cavity and insert the wheel in the cavity. For this purpose, the device is preferably made of material having a modulus of elasticity or Young's modulus between 2xl09 Pa and 2xl07 Pa, preferably between 8xl08 Pa e 8xl07 Pa. Preferably the
device is made of rubber or similar material.
It is also possible to secure the device on the wheel mechanically for example: - by means of elastic strips fixed to the two sides of the device that passing inside the wheel of the stroller make the wheel integral with the device, as shown in Figure 11.
The above mentioned strips are fixed on the external side of the device, for example by: - pins 18 fitted on the external side of the device to hook the strips 19 by the holes made on the strips themselves; - velcro 22 fixed on the strip and on the external side of the device.
On the internal side of the device, in order to avoid interference between the device and the parts of the stroller in the proximity of the wheel, the strip is preferably integral with the device limiting the overall dimensions and avoiding that the strip is separated from the device when not used and can be lost.
In case the device is mechanically fixed on the wheel the diametrical interference is preferably less than x or equal to 0.
Another way to realize the invention is to use two devices. These two devices together delineate an internal circular cavity of internal diameter 6 equal to D and x = 0 (Figure 7 and 10).
Also in this case the internal circumference has in the direction of the axis of rotation of the wheel a convex profile such as to adhere to the outer profile of the tread of the wheel (section A- A).
Preferably the devices are fixed to the wheel by mechanical means that lock each device to the structure of the wheel, for example as in the case of the above mentioned strips, - by a sliding track fitted on the outer side of the
wheel, see for example Figure 12. Preferably the sliding track consists of a profile 25 with a slot in the center where the fastening pins 26 can move and are shaped so that they cannot come out of the slot. The fastening pins are integral with the devices 24 and have an elastic cord that links a pin of a device and one of the opposite device 27. The mechanical lock so structured allows the devices to move from each other (Figure 13) in order to receive the profile of the wheel.
Once fitted on the wheel the tension of the elastic cord keeps the devices pushed on the tread of the wheel generating the friction force required to make them integral with the wheel itself. Compared to the elastic strips this system allows to fix the devices even if the wheel has no internal cavities in which the elastic strips can pass by and makes the two devices integral one with the other.
The advantages of this embodiment compared to the above are:
- to apply the invention to a wheel it is not necessary to lift the wheel off the ground;
- the inner profile can fit also to wheels with very large diameter.
For this embodiment, in case the arch of the wheel covered by a device is less than one third of the entire circumference of the wheel, up to 3 devices profiles per wheel can be applied.
To ensure a fluid oscillation, to dampen the possible roughness of the ground and to ensure a suitable traction on the ground on which the stroller moves, the material by which the device is made is preferably rubber or otherwise elastic material with characteristics such as to absorb the roughness of the ground on which it moves and ensure adherence to the ground itself.
Industrial application of the invention
The present invention can be used to induce an oscillatory movement to a stroller, to a pram or to a wheeled vehicle of similar type. The device which is to be applied to the tread of one or more wheels of the vehicle when you want to induce the oscillatory movement, comprises a concave internal profile having a constant curvature in the plane of the wheel for receiving the wheel; and a substantially convex external profile having a variable curvature in the plane of the wheel.
According to a preferred embodiment of the invention, the internal profile defines a substantially circular cavity suitable to receive the wheel, and inner circumference, and the external profile defines a closed perimeter with dimensions bigger than the inner circumference.
The present invention can also consist in a kit comprising a wheeled vehicle and at least one device as described above to be applied to the tread of one or more wheels of the vehicle to induce an oscillatory movement. The device and/or the kit can additionally comprise means to secure the device to the wheel on which it is applied.
The above mentioned device is easy to use and then suitable to a very wide audience. It has a low cost of manufacturing because it does not contain any mechanism or electrical / electronic apparatus. The device which is of variable size according to the size of the wheels of the vehicle to which it is applied is always portable and light. The device does not require any modification to the structure / design of the stroller; it is movable therefore can be applied and removed from the stroller when needed without compromising the original function of the stroller itself. The oscillating
movement is achieved with a minimum of effort.
Claims
1. Device applied to the tread of one or more wheels of a vehicle to induce an oscillatory movement to the vehicle itself, comprising a concave internal profile having a constant curvature in the plane of the wheel for receiving the wheel itself and an external profile of substantially convex shape and of variable curvature in the plane of the wheel, so that by turning said wheel in contact with the ground, the axis of the wheel to which the device is applied swings vertically causing said oscillatory movement.
2. Device according to claim 1, wherein the internal profile defines a substantially circular cavity for receiving the wheel, an internal circumference, and wherein the external profile defines a closed perimeter larger than the internal circumference.
3. Device according to claim 2, wherein the inner circumference of the profile has a diameter equal to D-x, wherein D is the outer diameter of the tread of the wheel on which the device is applied and x is the diametrical interference required to generate the frictional force necessary to maintain the internal circumference integral with the tread of the wheel.
4. Device according to claim 3, wherein x=0 and the inner circumference has a diameter equal to D.
5. Device according to any of the preceding claims 2-4, wherein the external profile is an ellipse.
6. Device according to any of the preceding claims, wherein the center of the internal circular cavity coincides with the center of gravity of the external profile.
7. Device according to any of the preceding claims, additionally
comprising means to secure the device to the wheel on which it is applied.
8. Device according to claim 7 wherein the means to secure the device to the wheel comprise elastic strips connected to the external sides of the device.
9. Device according to claim 7 wherein the means to secure the devices to the wheel comprise a sliding track connected to the external side of the device.
10. Use of the device according to any of the claims 1 to 9 for inducing an oscillatory movement to a vehicle with wheels.
11. Use according to claim 10, wherein the vehicle is a stroller or a pram.
12. Kit comprising a stroller or a wheelchair and at least the device of any of the claims 1 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITGE2012A000069 | 2012-07-18 | ||
| IT000069A ITGE20120069A1 (en) | 2012-07-18 | 2012-07-18 | DEVICE FOR INDUCING OSCILLATOR MOVEMENT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014012647A1 true WO2014012647A1 (en) | 2014-01-23 |
Family
ID=47016757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2013/002090 WO2014012647A1 (en) | 2012-07-18 | 2013-07-15 | Device to induce an oscillatory movement |
Country Status (2)
| Country | Link |
|---|---|
| IT (1) | ITGE20120069A1 (en) |
| WO (1) | WO2014012647A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110946435A (en) * | 2019-12-29 | 2020-04-03 | 屈正炎 | Intelligent baby shaking and stroking control system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US618337A (en) * | 1899-01-24 | Chair | ||
| US1467811A (en) * | 1921-09-10 | 1923-09-11 | Plant Albert La | Baby-carriage attachment |
| GB2219199A (en) | 1988-05-30 | 1989-12-06 | Arlegui Rubio Tomas | Rocker for a baby carriage or crib |
| WO2004062977A1 (en) | 2003-01-10 | 2004-07-29 | George Peter Charles Hepworth | Rocking device |
| WO2004113097A1 (en) * | 2003-06-24 | 2004-12-29 | Roger Thompson | A wheel |
| WO2005005226A1 (en) | 2003-06-09 | 2005-01-20 | Lerner William S | Automatically rocking stroller |
| US20080314665A1 (en) | 2005-11-18 | 2008-12-25 | Sanders Associates Limited | Infant Stroller Rocking Device |
| US20110057502A1 (en) * | 2009-09-10 | 2011-03-10 | Marie Green | Wheel rocking mechanism |
| EP2418140A1 (en) | 2010-08-12 | 2012-02-15 | Massimo Amenduni Gresele | Baby rocking device, for imparting a reciprocating rocking movement to a perambulator, push-chair or the like |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2221103A1 (en) * | 1971-05-03 | 1972-11-16 | Kazimierz Lopuszynski | Seesaw or swing device |
| JPS4994344U (en) * | 1972-12-04 | 1974-08-15 | ||
| GB2334670B (en) * | 1998-02-11 | 2001-07-25 | Christopher Rowe | Rocking device |
| DE19860389A1 (en) * | 1998-07-01 | 2000-01-20 | Georg Glassen | Rocking facility used for pram or cot is made of non-slippery synthetic material |
| CN2678989Y (en) * | 2004-03-01 | 2005-02-16 | 艾帅华 | Cradle |
-
2012
- 2012-07-18 IT IT000069A patent/ITGE20120069A1/en unknown
-
2013
- 2013-07-15 WO PCT/EP2013/002090 patent/WO2014012647A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US618337A (en) * | 1899-01-24 | Chair | ||
| US1467811A (en) * | 1921-09-10 | 1923-09-11 | Plant Albert La | Baby-carriage attachment |
| GB2219199A (en) | 1988-05-30 | 1989-12-06 | Arlegui Rubio Tomas | Rocker for a baby carriage or crib |
| WO2004062977A1 (en) | 2003-01-10 | 2004-07-29 | George Peter Charles Hepworth | Rocking device |
| WO2005005226A1 (en) | 2003-06-09 | 2005-01-20 | Lerner William S | Automatically rocking stroller |
| WO2004113097A1 (en) * | 2003-06-24 | 2004-12-29 | Roger Thompson | A wheel |
| US20080314665A1 (en) | 2005-11-18 | 2008-12-25 | Sanders Associates Limited | Infant Stroller Rocking Device |
| US20110057502A1 (en) * | 2009-09-10 | 2011-03-10 | Marie Green | Wheel rocking mechanism |
| EP2418140A1 (en) | 2010-08-12 | 2012-02-15 | Massimo Amenduni Gresele | Baby rocking device, for imparting a reciprocating rocking movement to a perambulator, push-chair or the like |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110946435A (en) * | 2019-12-29 | 2020-04-03 | 屈正炎 | Intelligent baby shaking and stroking control system |
| CN110946435B (en) * | 2019-12-29 | 2020-09-04 | 朱昌霞 | Intelligent baby shaking and stroking control system |
Also Published As
| Publication number | Publication date |
|---|---|
| ITGE20120069A1 (en) | 2014-01-19 |
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