KR20180097090A - Knob assembly having display device using wirelee power transmission - Google Patents

Abstract

The present invention relates to a knob assembly of a cooking appliance and, more specifically, relates to a knob assembly which has a display machine to display information such as heating power or timer time, wherein the display machine is provided with power and a signal through wireless power communication. According to the present invention, the knob assembly comprises: a knob handle coupled to a control shaft to control heating power; a knob ring covering surroundings of the knob handle, arranged to penetrate through a front panel, independently rotating with the knob handle, and provided with the display machine; a wireless power transmission unit fixated to the front panel; and a wireless power receiving unit fixated to the knob ring to receive the power and the signal to drive the display machine from the wireless power transmission unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a knob assembly having a display unit using wireless power communication,

The present invention relates to a knob assembly of a cooking appliance, and more particularly to a knob assembly having a knob assembly with a display device for displaying information such as fire power or timer time, And a cooking appliance including the same.

A cooking device is one of household appliances for cooking food, and is installed in a kitchen space to cook food according to a user's intention. Such cooking devices can be classified into various types according to the heat source or type used and the type of fuel.

Cooking equipment can be classified into open type and closed type cooking equipment depending on the type of space where food is placed. There are ovens and microwave ovens in the closed type cooking devices, and cooktops and hops in the open type cooking devices.

A closed type cooking device is a cooking device that shields a space where food is placed and cooks food by heating a shielded space. The open type cooking device is a cooking device in which a food or food container is placed in an open space and a food or food container is heated to cook food.

The closed type cooking apparatus is provided with a cooking chamber, which is a space that is shielded when the food is placed and food is to be cooked. Such a cooking chamber becomes a space where food is substantially cooked. A heat source is provided in the inside or outside space of the cooking chamber to heat the cooking chamber.

2. Description of the Related Art In recent years, a closed type cooking device and an open type cooking device are installed at the same time, and a plurality of heat sources are combined to provide various cooking utensils and a plurality of foods simultaneously.

In the combined cooking device, an open cooking device is placed on the upper side of the closed cooking device. Also, the open cooking device is provided with a plurality of heaters or burners, and is installed so that a large number of dishes can be cooked at the same time.

When a user makes an oven such as a barbecue or a baking, or grills a meat or a fish, the user uses a closed cooking device to cook the food. When the user puts food into a container and heats the food, I cook with the device.

Among open type cooking devices, an open type cooking device in the form of a gas range is widely used, and is a device for cooking food using a flame generated when the gas is burned.

There are various ways in which the user controls the intensity of the flame of the cooking appliance. A method of controlling the firepower by adjusting the amount of rotation of the knob using a knob rotating around a predetermined rotation axis is widely used. This knob is connected to a valve for controlling the amount of flow of gas to mechanically control the opening and closing amount of the valve. In recent years, the amount of rotation of the knob is electronically measured, and the amount of opening and closing of the valve is electronically controlled Is also applied.

In the case of a cooking appliance or an integrated cooking appliance including an oven, a display device for displaying a timer time, an operation state, and the like may be provided. A timer function is indispensable for an oven requiring long time cooking, and a state in which the state information of the cooking appliance can be displayed through a separate display device is provided even though the dial type timer is provided.

A display device is not essential in the case of having only the gas cooker but a display device is necessary in the case of the gas oven range and a display device for displaying various information is considered to be essential for the complex cooking device have.

However, since the information displayed for each individual product is different, the design of the display screen and the UI have been separately developed.

The present invention provides a knob assembly having a display unit on a knob assembly so that necessary information can be displayed on the knob assembly, so that a separate display unit is not required, and can be universally applied to various cooking apparatuses.

Also, since the display provided in the knob assembly provides a structure in which power and signals are supplied through wireless power communication, there is no fear of disconnection even in repeated use, and a knob assembly for preventing visible through holes for wiring and wiring is provided .

It is an object of the present invention to provide a knob ring that can be independently operated around a knob handle for controlling a thermal power of a cooking appliance so that operation such as timer time adjustment other than a thermal power can be performed using the knob ring, And a knob assembly including the knob assembly.

Another object of the present invention is to provide a display device provided in the knob ring to receive power and a signal using wireless power communication so that wiring is not damaged even in repetitive operation of the knob ring, The knob assembly comprising:

It is still another object of the present invention to provide a knob assembly that can be applied to a general cooking apparatus including an oven.

In order to achieve the above object, the present invention provides a knob handle, comprising: a knob handle coupled to a control shaft for controlling a thermal power; A knob ring surrounding the knob handle and disposed to penetrate the front panel, the knob ring being independently rotatable with the knob handle and having a display; A wireless power transmission unit fixed to the front panel; And a wireless power receiver fixed to the knob ring and receiving power and a signal for driving the display from the wireless power transmitter.

The wireless power transmission unit includes a transmission coil for transmitting power and a signal to the wireless power reception unit, an inverter for providing an AC power to the transmission coil, and an inverter for receiving the signal to be displayed on the display unit, And a modulation control unit for modulating the received signal.

The wireless power receiving unit includes a receiving coil for receiving power and a signal from the wireless power transmission coil, a rectifier for converting a current of the receiving coil to provide driving power for the display device, And a demodulation control unit for demodulating the signal extracted by the signal detection unit and transmitting the demodulated signal to the display unit.

The apparatus may further include a regulator that stabilizes the driving power provided by the rectifier and provides the stabilized driving power to the display device.

The wireless power receiving unit may include a receiving coil, a receiving circuit board on which the display driving circuit is mounted, and a magnetic body provided between the receiving coil and the receiving circuit board.

The control unit may further include a knob ring encoder for detecting an operation of the knob ring and a knob encoder for detecting an operation of the knob handle so that an output of the crane detected by the knob encoder, So that the time is displayed on the display device.

Wherein the knob ring includes a knob ring body forming an outer tube, a back plate having a support hole coupled to a back surface of the knob ring body and supporting an adjustment shaft penetrating therethrough, a support plate coupled to the back plate, And a support ring coupled to the back plate.

At this time, the wireless power receiving unit may be fixed to the back plate or the support ring.

A support frame coupled to the front panel and supporting an outer circumferential surface of the support ring; And a fixing frame coupled to the support frame to prevent separation of the support ring,

The wireless power transmission unit may be fixed to the support frame or the fixed frame.

The knob assembly according to the present invention includes a knob ring that can be independently operated around a knob handle. By disposing a display device on the knob ring, the timer time of the cooker of the burner or the oven can be controlled through the operation of the knob ring And the set firepower and the timer time can be displayed on the display device.

Further, the display device disposed in the knob ring receives power and signals using wireless power communication, thereby providing a structure in which the wiring does not pass through the front panel.

Therefore, since the assembly is completed by mounting the knob ring without connecting the wiring to the knob ring, the assembling property is improved. In addition, since the wiring is not connected to the knob ring operated in a repetitive manner, the wiring is not damaged even when used for a long period of time, and the durability is improved.

In addition, the knob assembly according to the present invention can be widely applied not only to a gas range but also to an integrated cooking device including an oven range, an induction range, an electric range, and the like, thereby enabling components to be used in various cooking devices.

1 is a view showing a cooking appliance having a separate display unit.
2 is a front view of a knob assembly according to an embodiment of the present invention.
FIG. 3 is a view illustrating an assembled state of the knob assembly according to the embodiment of the present invention.
4 is a view illustrating a state in which the knob assembly is separated according to the embodiment of the present invention.
5 is a block diagram of a wireless power transceiver of a knob assembly in accordance with an embodiment of the present invention.
FIG. 6 is a view illustrating a state in which the wireless power receiver of the knob assembly is separated according to an embodiment of the present invention.
7 is a cross-sectional view illustrating an arrangement of a wireless power transmitting / receiving unit of a knob assembly according to an embodiment of the present invention.
8 is a block diagram illustrating a configuration of a wireless power transmission / reception unit of a knob assembly according to an embodiment of the present invention.
9 illustrates an exemplary signal of a wireless power transceiver of a knob assembly according to an embodiment of the present invention.
10 is a view illustrating a knob ring of a knob assembly according to an embodiment of the present invention.
11 is a view for explaining the operation of the knob assembly according to the embodiment of the present invention.
12 is a diagram illustrating a knob encoder of a knob assembly according to an embodiment of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning and the inventor shall properly define the concept of the term in order to describe its invention in the best possible way It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. It should be noted that the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It should be understood that various equivalents and modifications are possible.

1 is a view showing a cooking appliance having a separate display unit.

As shown in the figure, the cooking apparatus 10 having the oven includes a knob 11 for adjusting the thermal power, a knob 12 for adjusting the time of the timer, and a display device 15, and a switch 16 for separate operation.

In the case of an oven, it is often necessary to prepare for a long period of time, and therefore, a timer for setting the operation time of the oven is considered to be essential.

For uniformity of design and convenience of operation, a rotary switch is widely applied to the knob 11 for adjusting the thermal power and the knob 12 for adjusting the time of the timer.

The display device 15 serves to display the operation state of the cooking device and the like. The information displayed on the display device 15 may be the output (temperature) of the burner, the timer time, the cooking mode of the automatic cooking function, and the like.

However, as described above, when the configuration of the cooking apparatus of the cooking appliance is changed, or when the specification of the product is changed, the information or the UI displayed on the display device 15 is changed accordingly, .

Also, since the knob 11 for adjusting the firepower and the knob 12 for setting the timer time have the same shape, it is excellent in terms of design, but it is difficult to determine which knob performs which function It was difficult to recognize intuitively.

In order to solve this problem, the present invention provides a cooking apparatus including a knob handle for adjusting a thermal power of the cooking apparatus, and a knob ring for adjusting the timer time of the cooking apparatus, wherein the knob ring includes a display unit, The present invention provides a knob assembly that is excellent in design and has advantages in terms of component sharing.

Hereinafter, each component of the knob assembly according to an embodiment of the present invention will be described.

FIG. 2 is a front view of a knob assembly according to an embodiment of the present invention. FIG. 3 is a view illustrating a knob assembly according to an embodiment of the present invention. And FIG.

[Knob Handle (110)]

The knob handle 110 is connected to the adjustment shaft 194 of the thermal power control unit 190 for controlling the thermal power.

The knob handle 110 may be configured as a non-return type rotary switch.

The non-return type rotary switch is a mode in which the knob handle 110 maintains the position rotated by the user, and the user can recognize the output of the crane from the rotated position of the knob handle 110. [

For example, in the case of a gas burner, the thermal power control unit 190 may be a valve assembly. In the case of an electric range or an induction range, the thermal power control unit 190 may include an output control means (for example, a variable resistor) .

The knob handle 110 is basically a circular shape and has a protruding handle. In the illustrated embodiment, the handle portion is protruded by a bar-like shape, but the shape of the handle portion may be variously changed.

The knob handle 110 may be made of a synthetic resin injection material or may be manufactured by processing a metal material. The material and shape of the knob handle 110 can be variously modified.

[Knob ring (120)]

The knob ring 120 is disposed on the outer peripheral surface of the knob handle 110 to improve the appearance around the knob handle 110.

Basically, the knob ring 120 serves to support the knob handle 110 and finish the appearance around the knob handle 110 to improve the appearance quality.

In the knob assembly according to the present invention, the knob ring 120 serves as a timer operation switch and a display for displaying the timer time and the size of the thermal power.

According to the present invention, the knob ring 120 is rotatable independently of the knob handle 110, so that the timer time can be set through the operation of the knob ring 120. The present invention also includes a display 123 on the knob ring 120 to enable display of the timer time and the size of the thermal power through the display 123.

To this end, a knob ring encoder E2 for detecting the amount of rotation of the knob ring 120 is provided. The knob ring encoder E2 senses the rotation of the gear portion G2 provided in the support ring 127, which will be described later.

The non-return knob handle 110 may identify the output of the corresponding crane from the position of the knob handle 110, but the output of the crane may be displayed on the display 123. For example, in the case of an electric range or an induction range, the control unit can acquire information about the output of the corresponding crater and display it on the display device. In the case of the gas range, a configuration for separately detecting the operation amount of the gas control shaft is required. For example, a knob encoder E1 that senses the amount of operation of the control shaft 194, detects the displacement of the control shaft 194 and derives the output of the corresponding crane, Can be displayed.

The display unit 123 may display a fire power and a timer time.

The thermal power displayed on the display 123 can be sensed and displayed from the amount of rotation of the knob handle 110 so that the timer time displayed on the display 123 is detected and displayed from the operation of the knob ring 120 can do.

Meanwhile, the display device 123 may include a portion for displaying the thermal power and a portion for displaying the timer time. However, as shown in the figure, one display 123 may selectively display the thermal power and the timer time have.

For example, when the timer is not set, only the thermal power is displayed. If the timer is set, the timer can be displayed for a predetermined time after the thermal power is displayed for a certain period of time.

In this case, it is more preferable that the user can easily confirm whether the number of the lighting color when the fire power is displayed and the color of the lighting when the timer time is displayed indicates the fire power or the timer time .

For example, you can display firepower in red and timer time in white (or blue). If both firepower and timer are displayed, the timer can be displayed for 2 seconds after the firepower is displayed for 2 seconds.

In this way, the fire power and the timer time can be adjusted through the knob assembly, and if the fire power and the timer time can be both displayed through the knob assembly, a separate display unit may not be required on the front panel.

Further, the structure of such a knob assembly can be applied to both the oven range including the oven and the cooktop including only the burner, and has an advantage that it can be used as a common part among them.

On the other hand, the knob ring 120 is provided with a support ring 127.

The support ring 127 is a part constituting the back surface of the knob ring 120 and is disposed inside the cooking apparatus. The support ring 127 may be provided with a gear portion G2 and the gear portion G2 is engaged with the knob ring encoder E1. From this, the knob ring encoder E2 can sense the operation of the knob ring 120. [

[Support frame 140]

The support frame 140 is coupled to the front panel C to support the knob ring 120. The knob handle 110 and the knob ring 120 are coupled to an aligned position of the front panel C, wherein the front panel C is made of a thin metal plate. Therefore, when the front panel C is formed with a hole and the knob ring 120 is directly rubbed against the hole, the knob ring 120 is cut. Therefore, the support frame 140 is engaged so as to be aligned with the holes formed in the front panel (C).

The support frame 140 is provided with a guide groove corresponding to the outer diameter of the support ring 127 provided on the knob ring 120. In other words, the outer peripheral surface of the support ring 127 is supported by the support frame 140 and can be rotated at a predetermined position.

In other words, the position of the knob ring 120 is determined by the support frame 140, and the support frame 140 is fastened to the front panel C, As shown in FIG.

The support frame 140 surrounds the outer circumferential surface of the support ring 127 and supports the support ring 127 so as to rotate about a certain axis.

[Fixed frame 160]

The fixing frame 160 is fastened and fixed to the support frame 140 by a fastening means such as a screw and serves to prevent the support ring 127 from being detached from the stationary frame 160 rearward (toward the inside of the cooking apparatus) .

The fixed frame 160 restrains the rotation range of the support ring 127 and restricts rotation of the knob ring 120 in the left and right directions only within a certain angle range.

As shown in the figure, the fixed frame 160 has a shape similar to a bow-like tie. The angle of the portion corresponding to the wing of the butterfly restricts rotation of the support ring 127 within a certain angle range, And the portion connecting the wings prevents the support ring 127 from falling backward.

[Bearing shell (130)]

The bearing shell 130 serves as a bearing for smooth operation of the knob ring 120.

The bearing shell 130 is provided with a cylindrical cylindrical portion 134 and a circular plate portion 132 which is bent at the cylindrical portion 134 and protruded in the radial direction.

The cylindrical portion 134 is inserted between the outer peripheral surface of the support ring 127 provided on the knob ring 120 and the inner peripheral surface of the fixed frame 160 to reduce the friction between the support ring 127 and the fixed frame 160 .

The disc portion 132 is inserted between the front panel C and the knob ring 120 to reduce the friction between the knob ring 120 and the front panel C. [ The disc portion 132 also serves to reduce the occurrence of scratches on the front panel C by operating the knob ring 120 by making the knob ring 120 spaced from the front panel C by a predetermined distance.

FIG. 5 is a view illustrating a wireless power transmission / reception unit of a knob assembly according to an embodiment of the present invention. FIG. 6 is a view illustrating a state of separation of a wireless power receiving unit of a knob assembly according to an embodiment of the present invention, Sectional view for explaining the arrangement of the wireless power transmitting / receiving unit of the knob assembly according to the embodiment of the present invention.

Hereinafter, a wireless power transmission / reception structure of the knob assembly according to the present invention will be described.

[Wireless power transmission / reception unit (TX_M, RX_M)]

The present invention provides a structure in which a display 123 is provided on a knob ring 120 and the display 123 receives power and signals wirelessly.

Since the knob ring 120 has a structure capable of independently rotating with respect to the knob handle 110, when the display device 123 provided on the knob ring 120 receives power and signals through the wire, ) Should be provided for the wiring. At this time, the through hole should be formed so as to cover the rotation range of the knob ring 120. Such a through hole may be visible to the outside when the knob ring 120 is operated. Further, if the wiring is connected to the knob ring 120 repeatedly operated by wire, there is a possibility that the wiring is damaged or broken by repeated use.

The knob assembly according to the present invention includes a wireless power transmitter (TX_M) and a wireless power receiver (RX_M). The wireless power transmission unit TX_M is fixed to the front panel C of the cooking appliance and the wireless power reception unit RX_M is fixed to the knob ring 120. [

The wireless power receiving unit RX_M receives power and signals from the wireless power transmitting unit TX_M. The wireless power receiving unit RX_M drives the display unit 123 using the received power source to display the timer time or the crane output transmitted to the display 123.

5, the wireless power receiving unit RX_M includes a receiving coil COIL, a magnetic body F and a receiving circuit board PCB, and the receiving circuit board PCB is connected to a display 123 .

The reception coil COIL is disposed adjacent to the transmission coil of the wireless power transmission unit TX_M so that when an electric current flows through the transmission coil, an induced current flows in the reception coil due to the electromagnetic induction phenomenon.

The magnetic body F may be made of a ferrite material or the like and provides an effect of improving the electromagnetic induction effect on the reception coil COIL.

The display driving circuit is mounted on the receiving circuit board (PCB). Here, the display driving circuit will be described later with reference to Fig.

The wireless power transmission unit TX_M also has a configuration similar to that of the wireless power reception unit TX_M. The wireless power transmission unit TX_M includes a transmission coil for transmitting power and signals to the wireless power reception unit and a magnetic body for improving the electromagnetic induction effect of the transmission coil. In addition, a transmission circuit board connected to the transmission coil may be provided. Of course, the transmission circuit board may be disposed to face the transmission coil, but may be disposed at a position adjacent to the main control unit, and may be connected to the transmission coil with wiring.

Referring to FIG. 7, the wireless power transmission unit TX_M may be fixed to the fixed frame 160, and the wireless power reception unit RX_M may be fixed to the support ring 127. The fixed frame 160 and the support ring 127 are configured to face each other, and the wireless power transmission unit TX_M and the wireless power reception unit RX_M can be disposed on the fixed frame 160 and the support ring 127, respectively. In this case, the transmitting coil and the receiving coil may be formed in a donut shape as shown in Figs. 5 and 6.

Meanwhile, although not shown, the wireless power transmission unit TX_M may be provided in the fixed frame 140, and the wireless power reception unit RX_M may be fixed to the circumferential surface of the support ring. This is a structure in which the stationary frame 140 is constrained to surround the circumferential surface of the support ring 127. In this case, the transmission coil and the reception coil may be formed into a cylindrical shape.

FIG. 8 is a block diagram illustrating a configuration of a wireless power transmission / reception unit of a knob assembly according to an exemplary embodiment of the present invention, and FIG. 9 illustrates exemplary signals of a wireless power transmission / reception unit of a knob assembly according to an exemplary embodiment of the present invention.

As shown, the wireless power transmission unit TX_M is connected to the main control unit of the cooking appliance and receives power and signals from the main control unit. The main control unit receives the signal sensed by the knob encoder E1 and the signal sensed by the knob ring encoder E2 and transmits the signal to the wireless power transmission unit TX_M.

The wireless power transmission unit TX_M includes a transmission coil, an inverter that supplies AC power to the transmission coil, and a modulation control unit that receives the signal to be displayed on the display unit and controls the inverter to modulate the AC power.

The modulation control section receives a signal relating to the crane output or a signal relating to the timer time from the main control section, and modulates the AC power generated in the inverter to transmit the signal.

There are amplitude modulation method and frequency modulation method as a method of applying a signal to an AC power source. The amplitude modulation method is a method of transmitting a signal together with an alternating current power by changing the amplitude of the alternating current. The frequency modulation method is a method of transmitting a signal together with the alternating current power by changing the alternating frequency.

The radio power receiving unit RX_M includes a receiving coil, a rectifier for converting an AC power derived from the receiving coil into a DC power, a signal sensing unit for extracting a signal from the AC power supplied to the receiving coil, And a demodulation control unit for demodulating the received signal and delivering the reconstructed signal to the display 123.

The power source converted from the rectifier is used as the driving power source of the display device 123, and the signal restored by the demodulation control part is displayed on the display 123.

The regulator may further include a regulator for stabilizing the current of the rectifier, and an LDO regulator (Low Drop Off Regulator) may be applied to the regulator.

In the case where a signal is transmitted on a power by a frequency modulation method, the signal section may be constituted by a frequency detection sensor section. If the signal is transmitted on the basis of an amplitude modulation method, the signal detection section may be constituted by an amplitude detection sensor section have.

9 is a diagram for explaining signal and power transmission through a frequency conversion method. The original signal is the signal that should be transmitted to the display.

When the original signal is modulated by the frequency conversion method to the alternating current of the inverter, the frequency of the alternating current is converted according to the signal value.

A frequency-converted current is applied in the transmission coil, and thus the induction current in which the frequency is converted is applied to the reception coil.

The signal sensing unit constituted by the frequency sensing sensor unit senses the frequency of the current induced in the reception coil and transmits it to the demodulation control unit. The demodulation control unit restores the signal from the signal and generates a restored signal, and transmits the restored signal to the display unit.

10 is a view illustrating a knob ring according to an embodiment of the present invention.

As shown, the knob ring 120 according to an embodiment of the present invention includes a knob ring body 124 forming an outer tube, a back plate 125 coupled to the back surface of the knob ring body 124, A support tube 126 coupled to the plate 125 and supporting an adjustment shaft and a support ring 127 coupled to the back plate 125. [

The back plate 125 has a support plate 125b that enters the inside of the front panel and projects to the inside of the cooking apparatus. The support plate 125b is provided with a support hole 125c for supporting the adjustment shaft.

The support plate 126 is coupled to the back plate 125. The support tube 126 includes a flange 126a coupled to the back plate 125 and a tapered tube 126b extending from the flange 126a and a support lip 126d extending longer than the tapered tube 126b. Respectively.

The tapered pipe 126b has a tapered shape having a smaller diameter as the flange 126a moves away from the flange 126a, and a support portion 126c for supporting the adjustment shaft is provided.

In other words, the adjustment shaft is supported at two points of the support hole 125c and the support portion 126c. This structure provides an effect of stably supporting the adjusting shaft 194 even if the adjusting shaft 194 is movable.

As shown, the display device 123 is coupled to the knob ring body 124 via the display housing 122, and a finishing cap 121 is coupled to the outside of the display device 123. The finishing cap 121 may be made of transparent or semi-transparent material so that the information displayed on the display device 123 can be viewed from the outside.

11 is a view for explaining the operation of the knob assembly according to the embodiment of the present invention.

In the drawing, the front panel is not shown for convenience of illustration.

The knob ring 110 and the knob ring 120 are coupled to the front side of the front panel and the support frame 140, the support ring 127 and the fixing frame 160 are coupled to the back side of the front panel.

The fixed frame 160 is fastened to the back surface of the front panel C to support the periphery of the support ring 127. [ The rotation center of the support ring 127 is arranged to coincide with the axial center of the adjustment shaft of the knob handle.

The support ring 127 is inserted into the support frame 140 and partially protrudes from the front panel front surface through the front panel. The front end of the support ring 127 is formed in a cylindrical shape, and the cylindrical portion protrudes to the front surface of the front panel C. [

The back plate 125 of the knob ring 120 is coupled to the support ring 127 protruding from the front surface of the front panel C. [

The operation of the knob ring 120 can be recognized from the rotation of the support ring 127. [ Since the knob ring 120 is exposed to the outside of the front panel C, when the knob ring 120 is provided around the knob ring 120 to detect an operation of the knob ring 120 on the outside of the front panel, the appearance is not good. The rotation of the knob ring 120 can be sensed by detecting the rotation of the support ring 127 by providing the encoder E2 around the support ring.

The support ring 127 is provided with a knob ring gear portion G2 for transmitting a rotation angle. The present invention further includes a knob ring encoder E2 which is engaged with the gear portion G2 and reads the rotation angle of the support ring 127. [ The knob ring encoder E2 meshes with the knob ring gear G2 to read the rotational manipulation signal of the knob ring 120. [

On the other hand, the support ring 127 is connected to a pair of return springs S1 and S2 for returning to a predetermined position. It is preferable that the return springs S1 and S2 connect the support frame 140 supporting the support ring 127 and the support ring 127. [ The support frame 140 is provided with fixed ends 141 and 142 at its upper and lower ends and has a fixed end 127a at one wing portion 127b of the support ring and a fixed end 127a of the wing portion 127b, The pair of return springs S1 and S2 can be connected to the upper and lower fixed ends 141 and 142 of the housing 140, respectively.

One return spring S1 provides an elastic force in a clockwise direction when the support ring 127 is operated in a counterclockwise direction to provide an elastic force to return to the home position and the other return spring S2 contacts the support ring 127 are operated in the clockwise direction, they provide an elastic force in a counterclockwise direction and provide an elastic force to return to the home position.

Meanwhile, the support ring 127 may be provided with a fixing frame 160 for preventing the support ring 127 from being separated from the back surface and allowing the support ring 127 to operate stably.

The fixed frame 160 serves to prevent the support ring 127 from falling to the back surface across the back surface of the support ring 127.

The fixed frame 160 is fastened to the support frame 140. The fixed frame 160 can restrict the rotation range of the support ring 127. [

As shown in the figure, the support ring 127 has a wing portion 127b extending to one side, and has a structure in which a pair of return springs S1 and S2 are fixed to the wing portion 127b.

At this time, if the rotation range of the wing portion 127b is limited by the fixed frame 160, the bidirectional rotation angle of the support ring 127 can be restricted to a constant degree.

It is possible to provide the wing portions 127b on both sides so that the rotation of the support ring 127 is more stably restrained and the rotation range of the wing portions on both sides of the fixed frame 160 can be limited equally.

12 is a diagram illustrating a knob encoder of a knob assembly according to an embodiment of the present invention.

The knob assembly according to the present invention is capable of adjusting the thermal power through the operation of the knob handle and displaying the time of the timer through the operation of the knob ring.

To this end, a knob ring includes a display device, and includes a knob encoder E1 for detecting the operation state of the knob handle, and a knob ring encoder E1 for detecting the operation of the knob ring.

The knob ring encoder E2 is engaged with the gear portion G2 of the support ring 127 to sense rotation of the support ring. The knob ring 120 according to the present invention can be rotated within a certain range when an external force is applied to the knob ring 120. When the external force is released, the knob ring 120 returns to the home position.

For example, when the timer rotates at a predetermined angle in the clockwise direction, the time of the timer increases, and when the counterclockwise eccentricity rotates at a predetermined angle, the timer time is manipulated to decrease.

The knob handle 110 is connected to the adjustment shaft 194 of the thermal power control unit 190. The control shaft of the thermal power control unit 190 is a non-return type that maintains the operated position, and the knob encoder E1 senses the amount of rotation (operation angle) from the reference position.

The knob encoder E1 is engaged with the gear G1 coupled to the adjusting shaft 194 to sense the rotation of the adjusting shaft 194. Of course, in a cooker in which an electric power is controlled by an electric power such as an electric range or an induction range, the thermal power control unit 190 is formed of a variable resistor or the like. Therefore, the state of the thermal power control unit 190 .

It is to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and the scope of the present invention will be indicated by the appended claims rather than by the foregoing detailed description. It is intended that all changes and modifications that come within the meaning and range of equivalency of the claims, as well as any equivalents thereof, be within the scope of the present invention.

TX_M: radio power transmission unit RX_M: radio power reception unit
E1: Knob encoder E2: Knob ring encoder
S1, S2: return spring 110: knob handle
120: knob ring 122: display housing
123: display device 124: knob ring body
125: back plate 125b:
125c: Support hole 126: Support tube
126d: support lip 126c:
126b: tapered pipe 126a: flange
127: Support ring 130: Bearing shell
132: disc portion 134: cylindrical portion
140: support frame 160: fixed frame
170: joint 190: thermal power control unit
194: Adjusting axis

Claims (12)

A knob handle coupled to an adjustment shaft for controlling the thermal power;
A knob ring surrounding the knob handle and disposed to penetrate the front panel, the knob ring being independently rotatable with the knob handle and having a display;
A wireless power transmission unit fixed to the front panel; And
And a wireless power receiver coupled to the knob ring for receiving power and a signal for driving the display from the wireless power transmitter.
The method according to claim 1,
The wireless power transmission unit
A transmitting coil for transmitting power and signals to the wireless power receiving unit,
An inverter for providing AC power to the transmission coil,
And a modulation control unit receiving the signal to be displayed on the display unit and controlling the inverter to modulate the AC power.
3. The method of claim 2,
The wireless power receiver
A receiving coil for receiving power and signals from the transmitting coil;
A rectifier for converting a current of the receiving coil to provide driving power for the display device;
A signal sensing unit for extracting a signal from an AC power source applied to the reception coil,
And a demodulation control unit for demodulating the signal extracted by the signal detection unit and transmitting the demodulated signal to the display unit.
The method of claim 3,
Further comprising a regulator for stabilizing the driving power provided by the rectifier and providing it to the display unit.
The method according to claim 1,
The wireless power receiver
A receiving coil,
A receiving circuit board on which the display driving circuit is mounted,
And a magnetic body disposed between the receiving coil and the receiving circuit board.
The method according to claim 1,
And a knob ring encoder for sensing an operation of the knob ring.
The method according to claim 6,
Further comprising a knob encoder for sensing an operation of the knob handle,
Wherein an output of the crane detected by the knob encoder and a timer time set by operation of the knob ring encoder are displayed on the display.
The method according to claim 1,
The knob ring
A knob ring body forming an outer appearance,
A back plate coupled to a rear surface of the knob ring body and having a support hole for supporting an adjusting shaft passing therethrough;
A support tube coupled to the back plate and supporting the adjustment shaft,
And a support ring coupled to the back plate.
9. The method of claim 8,
The wireless power receiver
And is fixed to the back plate or the support ring.
9. The method of claim 8,
A support frame coupled to the front panel and supporting an outer circumferential surface of the support ring; And
And a stationary frame coupled to the support frame to prevent disengagement of the support ring.
11. The method of claim 10,
Wherein the wireless power transmission unit is fixed to the support frame or the fixed frame.
12. A cooking appliance comprising a knob assembly according to any one of claims 1 to 11.

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