A device that allows a standard cordless lawnmower to recharge on an induction charging mat.

Abstract

The device allows a standard cordless hair clipper to recharge on an induction charging mat. The present invention relates to the design of a system for charging and maintaining the charge of a standard cordless handheld hair clipper. The present invention saves time on charging and allows for extended use of the clipper without the need for further attention. The system comprises an elastic sock (1) incorporating an induction charging receiver (2) which includes several coils, along with its microcomponents (3), a USB-C type adapter (5), and charging head tips (6). Any type of hair clipper can be inserted into this sock, along with an induction charging mat (7). Both the hair clipper sock and the induction charging mat include inductive charging coils (2) (8). The hair clipper sock includes a coil (2) for receiving the energy.The charging mat includes another coil (8) designed to generate energy through an induced current. To enable this coupling, the hair clipper must be positioned close to the charging mat, allowing the clipper to be charged even without an integrated induction charger. We utilize the principle of electromagnetic induction. The sock and the mat will be equipped with charging indicators with an on / off button (3)(4)(10)(11). The device of the invention is particularly suitable for professionals in the hairdressing industry. Figure for the abstract: [Fig. 1], [Fig. 2].

Description

Title of the invention: Device that allows a conventional cordless lawnmower to recharge on an induction charging mat. Technical field

[0001] The present invention relates to a device that allows a conventional cordless lawnmower to recharge on a charging mat using an induction field and a sock slipped over the lawnmower comprising an induction charging receiver. Prior art

[0002] Currently, the clippers must be placed on their base or reconnected to the charger to recharge them. This operation is time-consuming, while the tradesperson is often in the thick of the work. During the cutting process, tradespeople change clippers by placing them on the work surface in front of them, but without allowing them to recharge.

[0003] Battery life is often between 30 min and 160 min, few batteries have a battery life of up to 300 min and none have enough battery life to last a whole day without needing to be recharged. Description of the invention

[0004] The device of the invention makes it possible to overcome this drawback. The invention It therefore comprises 2 elements.

[0005] The first element of this invention is a sock that can contain several inductive charging receivers connected together. This elastic sock will adapt to any type of clipper handle. This sock may contain RGB LEDs that can indicate the battery status. This sock may or may not have a non-slip grip, chosen according to the user. As the product evolves, this sock may contain an integrated external battery to extend the clipper's operating time. It should be as thin as possible so as not to hinder tradespeople, see [Fig. 1].

[0006] The second element of this invention is a non-slip induction charging mat containing targets to indicate where to place the trimmers, with the option of being illuminated by RGB lighting when a trimmer is charging. The mat creates a magnetic field on its surface to easily recharge the trimmer equipped with its compatible and attached sock.

[0007] Under each target there will be an induction coil. This mat will be connected to a control box allowing the mat to be powered by a power cable and a control device. The layout and arrangement of the targets can be customized. These mats can offer a customized number of charging zones for mowers equipped with induction sock, see [Fig. 2].

[0008] Thanks to this device, the cordless trimmer will automatically recharge each time it is placed on a target before switching to the use of another trimmer. Brief description of the drawings

[0009] The accompanying drawings illustrate the invention:

[0010] [Fig-1] Elastic sock carrying the induction receiving coils and the signal processing part.

[0011] [Fig.2] Induction charging mat incorporating the transmitting coils and targets intended for the mowers.

[0012] [Fig.3] Diagram explaining the optimization of the arrangement of the coils by the angle theta. Best embodiment of the invention

[0013] The elastic sock (1) would be made of fabric, polyester, or narrow, flexible, and stretchable silicone to conform to the shape of all types of lawnmowers. Several induction coils (2) will be inserted inside this sock to receive a charge. They will be optimized to cover the maximum possible surface area. The charge-receiving coils are arranged at a frequency of 0 at all angles [Math. 1]. The coils will be connected to a signal processing area comprising several embedded electronic components such as a transformer, a rectifier, a charge controller, and a battery power tester, which will be located at the end of the sock (3). If the sock is made of silicone, it could be molded with the copper wires forming the coils.

[0014] The sock will be equipped with an on / off button (4) which will likely be located at its end. This sock will have a USB-C type connector (5) at its output. This connector will be connected to a female adapter which will be directly connected to the cordless trimmer via several different charging heads (6) corresponding to all types of trimmers. (Semi-circle, Oval, Double fork, Double slot, Single slot, Pentium.)

[0015] Sock dimensions as a non-limiting example: size between 0 and 10 cm in length with the possibility of custom sizes.

[0016] According to the demonstrations [Math. 2, 3, 4 and 5], the feasibility by orders of magnitude is proven.

[0017] If we calculate the flux density linked to the propagation of the electromagnetic wave between the two coils using the Poynting vector and if we consider Eo as the maximum electric field and Bo as the maximum magnetic field according to the standards by taking its maximum value, we obtain a flux 2 5.106W / ni2 specified in equation [Math. 2].

[0018] The surface area of ​​the receiving coil is approximated as a rectangle, hence its value of 3210 given in equation [Math. 3]. Thus, the maximum power Pmax passing through the coil is expressed by equation [Math. 4] and is then approximately ΣQ4 W. If we consider a lower efficiency of 1%, the power received by the sock coil is preçu = 1O2 IV. This power is more than sufficient to power conventional battery-operated hair clippers as shown in equation [Math. 5].

[0019] Furthermore, we have the possibility of reducing Bo by a factor of 2 to 10 to comply with legislation and while maintaining a margin, which is consistent with the feasibility of a sufficient energy transfer for only a part of the sock in contact with the carpet.

[0020] This is consistent with the feasibility of sufficient energy transfer for only a part of the sock in contact with the carpet, cf. [Fig.1]

[0021] The mat (7) can be made of various materials: plastic, polyester, fabric. Several zones will then be equipped with charge-emitting induction coils (8) and RGB LEDs (9) to delineate these charging zones. A small box will contain the electronics (inverter, transistors, resistors, etc.) necessary to power the coils and illuminate them when lawnmowers (13) are present.

[0022] An on / off button (11) for powering on and an on / off button for lighting the RGB LEDs when there are clippers (10) in use, will be fixed to the edge of the mat.

[0023] A layer of plastic, polyester or fabric (12) or other materials will be placed over the joined or superimposed coils to separate the entire set of mowers equipped with the sock.

[0024] The charging power in watts delivered by the mat can be adjusted to accommodate any type of rechargeable cordless trimmer and will be between 5 and 15 watts, by way of non-limiting example. This power will nevertheless comply with the maximum standard of 0.001 T for a magnetic field.

[0025] Mat dimensions: The mat can be custom-made to order or according to standard sizes, for example, but not limited to: 38x32, 50x34, 60x40, 80x40, 80x50 cm, in order to accommodate a maximum number of mowers and to be customized. See [Fig. 2] [Math.l] 0 = 005^) [Math.2] „ ai08.(10'4)2 n r-in6™J 7 n~^^~2-5-10 w / ™2 [Math.3] A = LL A = 410' 2 &l 0' 2 = 3Z1 cr 4 m 2 [Math.4] P max = An = 80.10 6 .l O' 4 ~ 10 4 w [Math.5] P received = P max- P r ^u = 10^0.01 = 10 2 W Variables and parameters

[0026] R: Sock radius

[0027] h: Maximum height above the mat for induction field reception

[0028] 0: Angle which must contain a coil

[0029] Bq; Maximum magnetic field according to European ICNIRP standards

[0030] Eq: Maximum electric field Eq ~ cBq

[0031] Pq: Magnetic permeability of vacuum

[0032] C: Speed ​​of light in a vacuum

[0033] n ; Poynting vector

[0034] A: Surface of the coil approximated as a rectangle

[0035] Pmax: Magnetic power passing through the coil

[0036] : Efficiency

[0037] P received: Power received by the sock coil

Claims

Demands

1. A cordless lawnmower charging device characterized in that it comprises: - an induction charging mat (7) including induction charge emitting coils (8) which generate an induction field; - and a sock (1) slid over the lawnmower including induction charge receiving coils (2).

2. Device according to claim 1 characterized in that the induction charge emitting coils (8) are housed on an insulating layer of plastic, polyester or fabric (12) of the induction charging mat (7) allowing the sock (1) to be charged.

3. Device according to claim 1 characterized in that the sock (1) is designed in an elastic material such as fabric, polyester or narrow silicone, flexible and stretchable to conform to the shape of all types of clippers.

4. Device according to any one of the preceding claims characterized in that the induction charge receiving coils (2) of the sock (1) are positioned in an optimized manner for charge reception at an angle (14) Q = R being the radius of the sock, h being the maximum height above the induction charge mat (7) for receiving the induction field.

5. Device according to any one of the preceding claims characterized in that the sock (1) is provided with a signal processing area comprising embedded electronic components (3) such as a transformer, a current rectifier, a charge calculator, a battery power tester, located at the end of the sock.

6. Device according to any one of the preceding claims characterized in that the sock (1) includes at the output a male USB-C type connector (5) which connects to a female adapter capable of connecting to the trimmer and serving as an interface to the trimmer via a charging head tip (6).

7. Device according to any one of the preceding claims, characterized in that the induction charging mat (7) is provided with targets indicating where to place the mowers, targets which light up (9) in the presence of the mowers.

8. Device according to any one of the preceding claims characterized in that the sock (1) includes RGB LEDs indicating the battery status and which can be activated or not in charge receiver mode by means of a switch (4).

9. Device according to any one of the preceding claims characterized in that the induction mat can be powered (10) or not via a switch and can indicate charge emission by RGB illumination of the targets (11) via a second switch.

10. Device according to any one of the preceding claims characterized in that all types of cordless lawnmowers are accepted thanks to the adaptability of the sock (1) supplemented by its induction mat (7).