JP6525374B2 - Grip warmer - Google Patents

Description

  The present invention relates to a grip warmer provided on a steering wheel of a vehicle such as a motorcycle.

  2. Description of the Related Art Conventionally, in the handle of a vehicle such as a motorcycle, a grip warmer (on the handle main body side) is provided inside of both grips gripped by a user so as to warm the hand so as not to bite. Electric power is supplied from the battery to the electric heater constituting the grip warmer through a power cord.

  In addition, a throttle pipe (accelerator cone) is provided on the inside of the grip warmer for adjusting the speed of the vehicle in one grip (usually the right side) of the steering wheel. The grip warmer and the throttle pipe rotate with respect to the handle body. At this time, since a force is applied to the connection between the grip warmer and the power cord, it is likely to deteriorate with time and break. Therefore, in Patent Document 1 and the like, it is described that a structure in which the force applied to the connecting portion is reduced to make the disconnection less likely to occur.

Japanese Patent Application Laid-Open No. 09-156562

  However, in the conventional structure including the patent document 1 etc., since the force applied to the connection between the grip warmer and the power cord is not in principle to be eliminated, the possibility of occurrence of disconnection due to deterioration with time remains.

  The present invention has been made in view of such circumstances, and its object is to provide a grip warmer capable of theoretically eliminating the possibility of disconnection when supplying power to an electric heater through a power cord. It is to do.

In order to achieve the above object, the grip warmer according to claim 1 resonates with a power transmitting device fixed in position with respect to the handle body and having a power transmitting resonator and the power transmitting resonator via a non-radiating electromagnetic field. a power receiving unit having a receiving resonator for receiving power, fixed in position relative to the grip and the power receiving unit, and the electric heater to which electric power is supplied from the power receiving device, Ri Na and wherein the power transmitting resonator and the The power receiving resonator is a coil in which a conducting wire is cylindrically wound, and the power receiving resonator is disposed inside the power transmission resonator .

The grip warmer according to claim 2 comprises a power transmitter fixed in position with respect to the handle body and having a power transmitting resonator, and a power receiving resonator for receiving power by resonating with the power transmitting resonator via a non-radiating electromagnetic field. A receiver, and an electric heater fixed in position with respect to the grip and the receiver and supplied with power from the receiver, and for shielding between the power receiving resonator and the handle body A conductive layer is provided.

  According to the grip warmer according to the present invention, the possibility of disconnection can be eliminated in principle for supplying power to the electric heater through the power cord.

It is a typical sectional view showing the grip warmer concerning the embodiment of the present invention, and other parts around it. It is an assembly drawing of the grip warmer same as the above, and other parts around it. It is an equivalent circuit schematic of a grip warmer same as the above. It is a perspective view which shows the example of the conductive layer for shields of a grip warmer same as the above. It is a photograph which shows the experimental composition of a grip warmer same as the above.

    Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a grip warmer 1 according to an embodiment of the present invention and other components therearound (handle body 5, throttle pipe 6, plug 7, grip 8). FIG. 2 is an assembly view of the grip warmer 1 and other parts around it (however, the grip 8 is omitted, and the reference numeral 6A in the figure indicates an accelerator wire). As shown in FIG. 1, the grip warmer 1 includes a power transmitter 2, a power receiver 3, and an electric heater 4.

  The power transmitter 2 is attached to the handle body 5. The power transmitter 2 has a power transmission resonator 21. The power transmitter 2 also has a power transmission controller 22 that controls the excitation of the power transmission resonator 21. The power transmission resonator 21 and the power transmission controller 22 are fixed to and supported by a substantially cylindrical power transmission support 2A as shown in FIG. Electric power is supplied to the power transmitter 2 from a battery attached to another place in a vehicle such as a motorcycle via the power supply cord 2B. In the power transmission controller 22, it is possible to input the voltage from the power supply cord 2B and convert it into a variable and stable DC voltage using a DC voltage conversion circuit (for example, a chopper circuit or the like).

  The transmitter support 2 </ b> A is fixed to the handle body 5. Thus, the transmitter 2 is fixed in position with respect to the handle body 5.

  The power transmitter support 2A is preferably fixed to the handle main body 5 at the center side (opposite to the end 5a of the handle main body 5) than the throttle pipe 6. In this way, the throttle pipe 6 of the normal shape can be used as it is.

  When power is supplied to the power transmitter 2, as shown in FIG. 3, the power transmission controller 22 excites the power transmission resonator 21 by the output of the built-in high frequency power source (for example, the frequency is around 1 MHz). Then, a non-radiative electromagnetic field (evanescent field) is generated around the power transmission resonator 21. In the equivalent circuit diagram shown in FIG. 3, an interaction by a non-radiative electromagnetic field between the power transmission resonator 21 and the power reception resonator 31 described below is indicated by M.

  The power receiver 3 has a power receiving resonator 31. The power receiving resonator 31 resonates with the power transmitting resonator 21 via a non-radiative electromagnetic field to receive power. The power receiver 3 also includes a power reception controller 32 that performs impedance conversion of the load (including the electric heater 4) of the power reception resonator 31. The power reception controller 32 can also perform DC voltage conversion. The power receiving resonator 31 and the power receiving controller 32 are fixed to a substantially cylindrical power receiving heater support 3A as shown in FIG.

  The electric heater 4 is attached to the outside of the throttle pipe 6 inside the grip 8. A planar heater, a nichrome wire heater or the like can be used as the electric heater 4.

  More specifically, the electric heater 4 is fixed to the power receiving heater support 3A. In addition, the power receiving heater support 3A is fixed to the inner side surface of the grip 8. Thereby, the electric heater 4 and the power receiver 3 are fixed in position with respect to the grip 8.

  As shown in FIG. 3, when the power reception resonator 31 resonates with the power transmission resonator 21 and receives power, the power is supplied from the power receiver 3 to the electric heater 4. The electrically powered electric heater 4 can generate heat, warm the grip 8 and warm the user's hand holding it.

  As described above, when the power transmitter 2 is fixed in position with respect to the handle main body 5 and the power receiver 3 is fixed in position with respect to the grip 8, the electric heater 4 (and the power receiver 3) and the throttle together with the grip 8 are Even if the pipe 6 rotates with respect to the handle main body 5, no force is applied to the connection portion of the power transmitter 2 with the power supply cord 2B. Therefore, in order to supply power to the electric heater 4 from the battery through the power supply cord 2B, it is possible to eliminate in principle the possibility of disconnection.

  It is preferable that the power transmission resonator 21 and the power reception resonator 31 both be a coil (solenoid coil) in which the conducting wire is cylindrically wound. Then, the power receiving resonator 31 of the power receiver 3 fixed in position with respect to the grip 8 is concentric with the power transmission resonator 21 of the power transmitter 2 fixed in position with respect to the handle main body 5 and the power transmitting resonator 21. And the gap between them can be arranged inside the power transmission resonator 21 with a narrow gap. Inside the power transmission resonator 21, a strong non-radiative magnetic field will be generated. Then, even if the grip 8 is rotated and the power transmitter 2 and the power receiver 3 are relatively rotated, the relative positional relationship between the entire power transmitting resonator 21 and the entire power receiving resonator 31 does not substantially change, The transmission efficiency of the power from the power transmission resonator 21 to the power reception resonator 31 can also be substantially unchanged. In each of the power transmission resonator 21 and the power reception resonator 31, a capacitor may be connected between both ends of the coil to adjust the resonance frequency.

  It is preferable to provide a shielding conductive layer 9 such as copper between the power receiving resonator 31 (and the power transmitting resonator 21) and the handle main body 5. This is to prevent power consumption from eddy current loss and magnetic loss in the handle main body 5 since the handle main body 5 is usually iron-based. Specifically, the shield conductive layer 9 can be provided on the outer surface of the handle main body 5 by plating or the like as shown in FIG. 4 (a) or as shown in FIG. 4 (b).

  Further, in the other grip of the handle where the throttle pipe is not provided, it is possible to provide the same grip warmer 1 or to use a conventional grip warmer. In the case of using a conventional grip warmer, it is also possible to adjust the balance of heat generation of the left and right electric heaters by the above-described DC voltage conversion circuit.

  Next, an experiment conducted by the inventor of the present invention will be described. In this experiment, as shown in FIG. 5, an iron pipe of a certain length was used as the handle body 5, and a thin copper plate was wound around the iron pipe as the conductive layer 9 for shielding. A wire was wound around a part of a cylindrical inner insulator into which the iron pipe is inserted to form a coil, and a power receiving resonator 31 was obtained. Furthermore, a conducting wire is wound around a part of the cylindrical outer insulator into which the cylindrical inner insulator is inserted, to form a coil, and a power transmission resonator 21 is formed. Then, the power transmission resonator 21 is disposed concentrically with the power reception resonator 31 so as to be outside the power reception resonator 31.

  In each of the power receiving resonator 31 and the power transmitting resonator 21, the resonance frequency of both the power receiving resonator 31 and the power transmitting resonator 21 is 1.006 MHz by adjusting the value of the capacitor between both ends of the coil. The unloaded Q of the power receiving resonator 31 at that time was 15.7, and the unloaded Q of the power transmitting resonator 21 was 37.6. In addition, the coupling coefficient was 0.445. These values indicate that the transmission of power is sufficiently possible.

  Although the grip warmer according to the embodiment of the present invention has been described above, the present invention is not limited to those described in the above embodiment, and various designs within the scope of the matters described in the claims Changes are possible.

DESCRIPTION OF SYMBOLS 1 grip warmer 2 power transmitter 21 power transmission resonator 2A power transmitter support 2B power cord 3 power receiver 31 power receiving resonator 3A power reception heater support 4 electric heater 5 handle main body 6 throttle pipe 7 plug 8 grip 9 conductive layer for shield

Claims (2)

A transmitter fixed in position with respect to the handle body and having a transmission resonator;
A power receiver including a power receiving resonator that resonates with the power transmitting resonator via a non-radiating electromagnetic field to receive power;
Fixed in position relative to the grip and the power receiver, Ri Na equipped with an electric heater to which electric power is supplied from the power receiving device,
In the grip warmer, the power transmission resonator and the power reception resonator are coils in which a conducting wire is cylindrically wound, and the power reception resonator is disposed inside the power transmission resonator . A transmitter fixed in position with respect to the handle body and having a transmission resonator;
A power receiver including a power receiving resonator that resonates with the power transmitting resonator via a non-radiating electromagnetic field to receive power;
A grip and an electric heater fixed in position with respect to the power receiver and supplied with power from the power receiver,
A grip warmer characterized in that a conductive layer for shielding is provided between the power receiving resonator and the handle body.