CN106593099B

CN106593099B - Vehicle key with antenna function and wearable electronic device using same

Info

Publication number: CN106593099B
Application number: CN201510663824.1A
Authority: CN
Inventors: 刘耿宏; 林彦辉
Original assignee: Shenzhen Futaihong Precision Industry Co Ltd; Chiun Mai Communication Systems Inc
Current assignee: Shenzhen Futaihong Precision Industry Co Ltd; Chiun Mai Communication Systems Inc
Priority date: 2015-10-15
Filing date: 2015-10-15
Publication date: 2020-05-19
Anticipated expiration: 2035-10-15
Also published as: TWI677815B; CN106593099A; TW201721396A

Abstract

The invention relates to a vehicle key with an antenna function, which comprises a shell, a circuit board and a metal sheet, wherein the metal sheet is movably arranged in the shell so as to be accommodated in the shell or be partially exposed out of the shell, a feed-in part is arranged on the circuit board and is contacted with the metal sheet and used for feeding current into the metal sheet, the metal sheet is used for receiving and transmitting wireless signals, and the metal sheet is provided with a saw-toothed structure so as to be manufactured into a key shape. The car key with the antenna function can receive and send wireless signals through the metal sheet, so that the car can be automatically controlled, and meanwhile, the metal sheet can also manually open the car door when the electric quantity is insufficient.

Description

Vehicle key with antenna function and wearable electronic device using same

Technical Field

The invention relates to a vehicle key with an antenna function and a wearable electronic device using the same.

Background

At present, the remote lock opening and closing function of the automobile key is popularized, and with the rapid development of automobile electronic technology, the automobile key is endowed with more functions, such as remote control of a lifting window, remote control of remote start, remote control of parking, even some automobile keys are integrated with a display screen, vehicle information display and the like. The increase of the functions of the key of the automobile remote control car and the improvement of the use frequency greatly increase the consumption of the electric quantity of the car key. When the battery is low, it may be difficult to open the door by the vehicle key.

Disclosure of Invention

In view of the above, it is desirable to provide a vehicle key with an antenna function for opening a vehicle door.

In addition, a wearable electronic device using the car key is needed.

A car key with an antenna function comprises a shell, a circuit board and a metal sheet, wherein the metal sheet is movably arranged in the shell so as to be contained in the shell or partially exposed out of the shell, a feed-in part is arranged on the circuit board and is in contact with the metal sheet and used for feeding current into the metal sheet, the metal sheet is used for receiving and transmitting wireless signals, and the metal sheet is provided with a saw-toothed structure to be made into a key shape.

A wearable electronic device comprises a body and a vehicle key with an antenna function, wherein the vehicle key with the antenna function comprises a shell, a circuit board and a metal sheet, the metal sheet is movably arranged on the shell and is contained in the shell or partially exposed out of the shell, a feed-in part is arranged on the circuit board, the feed-in part is in contact with the metal sheet and is used for feeding current into the metal sheet, the metal sheet is used for receiving and transmitting wireless signals, and the metal sheet is provided with a saw-toothed structure to be manufactured into a key shape.

The car key with the antenna function can receive and send wireless signals through the metal sheet, so that the car can be automatically controlled, and meanwhile, the metal sheet can also manually open the car door when the electric quantity is insufficient. In addition, the vehicle key with the antenna function is integrated on the wearable electronic device, so that the vehicle key is prevented from being lost.

Drawings

Fig. 1 is a perspective view of a vehicle key with an antenna function according to a preferred embodiment of the present invention.

Fig. 2 is a partially assembled view of the antenna-equipped vehicle key shown in fig. 1, wherein the metal plate of the antenna-equipped vehicle key is in a first state.

Fig. 3 is a partially assembled view of the antenna-equipped vehicle key shown in fig. 1, wherein the metal plate of the antenna-equipped vehicle key is in a second state.

Fig. 4 is a functional block diagram of the vehicle key having the antenna function shown in fig. 1.

Fig. 5 is a return loss diagram of the antenna-equipped car key shown in fig. 2 and 3.

Fig. 6 is an efficiency chart of the antenna-equipped vehicle key shown in fig. 2 and 3.

Fig. 7 is a perspective view of a wearable electronic device according to a preferred embodiment of the invention.

Fig. 8 is a return loss diagram of the wearable electronic device shown in fig. 7.

Fig. 9 is an efficiency diagram of the wearable electronic device shown in fig. 7.

Description of the main elements

Vehicle key with antenna function	100
		Shell body	10
Control button	12
		Opening of the container	14
Circuit board	20
		Gap	22
Feed-in part	24
		Metal sheet	30
First end part	32
		Second end portion	34
Adjusting circuit	50
		First switching circuit	51
Second switching circuit	52
		Signal source	60
Inductor	70
		Wearable electronic device	200
Body	220

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

Referring to fig. 1, a preferred embodiment of the present invention provides a vehicle key 100 with an antenna function for controlling a vehicle, such as remote control of a lift window, remote control of parking, manual and automatic opening of a door, etc. Referring to fig. 2 and 3, the vehicle key 100 with antenna function includes a housing 10, a circuit board 20 and a metal plate 30.

The housing 10 is provided with a plurality of control buttons 12, and when the control buttons 12 are activated by a user, the antenna-equipped car key 100 can control the car by wireless communication. The housing 10 is also provided with an opening 14 at one end for allowing the metal sheet 30 to pass through.

The circuit board 20 is accommodated in the housing 10. One side of the circuit board 20 forms a rectangular notch 22, and the notch 22 is communicated with the opening 14 and is used for receiving the metal sheet 30. In this embodiment, the gap 22 is about 7mm wide and about 30mm long. Furthermore, the circuit board 20 is further provided with a feeding portion 24, and the feeding portion 24 extends from one side of the circuit board 20 to the direction of the notch 22 for feeding current to the metal sheet 30.

The metal sheet 30 is substantially rectangular, and can be pushed by a pushing mechanism (not shown) to pass through the opening 14 of the housing 10, so as to be accommodated in the notch 22 or partially exposed out of the housing 10. The length of the feeding part 24 is adjusted so that the feeding part 24 contacts the metal sheet 30 to feed current to the metal sheet 30. Specifically, the metal sheet 30 includes a first end portion 32 and a second end portion 34 disposed opposite the first end portion 32. When the metal sheet 30 is received in the notch 22, the feeding portion 24 contacts the first end portion 32 of the metal sheet 30. When the metal sheet 30 is partially exposed out of the housing 10, the second end portion 34 is still received in the notch 22, and the feeding portion 24 contacts the second end portion 34 of the metal sheet 30. In the embodiment, the metal sheet 30 is an antenna for transmitting and receiving a wireless signal and is also a key, for example, one side or two sides of the metal sheet 30 may be provided with a saw-toothed structure to make a key shape, and the metal sheet is used for matching with a keyhole of a door of an automobile to manually open the door.

Referring to fig. 4, the vehicle key 100 with antenna function of the present invention further includes an adjusting circuit 50, a signal source 60 and a sensor 70 all disposed on the circuit board 20. The signal source 60 provides a driving current for the adjusting circuit 50, and the adjusting circuit 50 is electrically connected between the signal source 60 and the metal sheet 30. Specifically, the adjusting circuit 50 includes a first switching circuit 51 and a second switching circuit 52, and the first switching circuit 51 may be a variable capacitor electrically connected between the signal source 60 and the metal plate 30. The second switching circuit 52 may be a variable inductor, one end of which is electrically connected between the first switching circuit 51 and the metal sheet 30, and the other end of which is grounded. The sensor 70 is electrically connected to the adjusting circuit 50, and the sensor 70 is used for sensing the position of the metal sheet 30 relative to the housing 10 and outputting a control signal according to the sensing result, so as to control the first switching circuit 51 and the second switching circuit 52. Specifically, the sensor 70 may be a proximity sensor (proximity sensor) or a light sensor, and when the sensor 70 senses that the metal sheet 30 is partially exposed out of the housing 10, the sensor 70 outputs a first control signal to control the first switching circuit 51 to adjust to a first capacitance value (e.g., 2 pF), and control the second switching circuit 52 to adjust to a first inductance value (e.g., 7 nH). When the inductor 70 senses that the metal sheet 30 is accommodated in the notch 22, the inductor 70 outputs a second control signal to control the first switching circuit 51 to adjust to a first capacitance value (e.g., 2 pF), and simultaneously control the second switching circuit 52 to be in an open state, i.e., to adjust to a second inductance value (e.g., 0 nH).

In use, if the antenna-equipped vehicle key 100 has sufficient power, the user does not need to push the metal sheet 30 out of the housing 10. At this time, the sensor 70 senses that the metal sheet 30 is accommodated in the notch 22, and the sensor 70 outputs a second control signal to control the first switching circuit 51 to adjust to the first capacitance value and control the second switching circuit 52 to be in an open state. Since the metal piece 30 is accommodated in the notch 22, it is affected by the housing 10 to generate frequency deviation, and the frequency of the metal piece 30 resonated is kept within a certain range by the adjustment of the adjustment circuit 50. Referring to fig. 5, curve 1 shows the return loss of the metal sheet 30 when it is accommodated in the notch 22. At this time, the vehicle key 100 with the antenna function works in the frequency bands of 2.0-2.4GHz and 5.0-6.0GHz to receive and transmit bluetooth signals, and then communicates with the vehicle through the bluetooth signals to control the vehicle, such as remote control of the lifting window, remote control of parking, automatic opening of the door, and the like.

If the antenna-equipped car key 100 is low in power, the user pushes the metal piece 30 out of the housing 10 by the pushing mechanism. At this time, the sensor 70 senses that the metal sheet 30 is partially exposed out of the housing 10, and the sensor 70 outputs a first control signal to control the first switching circuit 51 to adjust to the first capacitance value and simultaneously control the second switching circuit 52 to adjust to the first capacitance value. Referring to fig. 5, curve 2 shows the return loss of the metal sheet 30 partially exposed out of the housing 10, and the vehicle key 100 with antenna function operates in the frequency bands of 2.0-2.4GHz and 5.0-6.0 GHz. At this time, the user can manually open the door of the automobile using the metal piece 30 exposed out of the case 10. Obviously, even if the antenna-equipped vehicle key 100 is low in power, the door cannot be opened.

Fig. 6 is a graph showing the efficiency of the antenna-equipped vehicle key 100. Wherein, curve 3 represents the efficiency when the metal sheet 30 is accommodated in the notch 22, and curve 4 represents the efficiency when the metal sheet 30 is partially exposed out of the housing 10. From the

curves

3 and 4, it can be known that the vehicle key 100 with antenna function has good efficiency in the frequency bands of 2.0-2.4GHz and 5.0-6.0 GHz.

Referring to fig. 7, the car key 100 with antenna function according to the preferred embodiment of the present invention can also be integrated into a wearable electronic device 200. In the present embodiment, the wearable electronic device 200 is a smart watch, which includes a body 220. The body 220 is annular, and the vehicle key 100 with the antenna function is fixed on one side of the body 220. In the present embodiment, when the metal piece 30 of the antenna-equipped car key 100 is accommodated in the notch 22, the first switching circuit 51 is adjusted to a second capacitance value (e.g., 1 pF), and the second switching circuit 52 is adjusted to a second inductance value (e.g., 18 nH), so as to reduce the influence of the metal piece 30 caused by the frequency offset. Fig. 8 is a return loss diagram of the wearable electronic device 200, and fig. 9 is an efficiency diagram of the wearable electronic device 200. It can be seen from fig. 8 and 9 that the wearable electronic device 200 has good signal transceiving effect in the frequency bands of 2.0-2.4GHz and 5.0-6.0 GHz. Moreover, the car key 100 with the antenna function is integrated on the wearable electronic device 200, and the car key 100 with the antenna function can be prevented from being lost.

The car key 100 with the antenna function of the present invention can receive and transmit the bluetooth signal through the metal sheet 30, thereby automatically controlling the car, and meanwhile, the metal sheet 30 can also manually open the car door when the electric quantity is insufficient. In addition, the vehicle key 100 with the antenna function is integrated on the wearable electronic device 200, so as to avoid loss.

Claims

1. The utility model provides a utensil antenna function's car key, its includes casing, circuit board and sheetmetal, its characterized in that: the metal sheet is movably arranged in the shell so as to be accommodated in the shell or partially exposed out of the shell, the circuit board is provided with a feed-in part, the feed-in part is contacted with the metal sheet and is used for feeding current into the metal sheet, the metal sheet is used for receiving and transmitting wireless signals, the metal sheet is provided with a saw-toothed structure to be made into a key shape, the vehicle key with the antenna function further comprises an adjusting circuit, a signal source and a sensor which are all arranged on the circuit board, the adjusting circuit is electrically connected between the signal source and the metal sheet, the sensor is electrically connected with the adjusting circuit and is used for sensing the position of the metal sheet relative to the shell and outputting a control signal according to a sensing result, the adjusting circuit comprises a first switching circuit and a second switching circuit, when the sensor senses that the metal sheet is partially exposed out of the shell, the sensor outputs a first control signal to control the first switching circuit to be adjusted to a first capacitance value, and simultaneously controlling the second switching circuit to adjust to the first inductance value, when the inductor induces that the metal sheet is accommodated in the shell, the inductor outputs a second control signal to control the first switching circuit to adjust to the first capacitance value, and simultaneously controlling the second switching circuit to be in an open circuit state.

2. The vehicle key with antenna function according to claim 1, characterized in that: an opening is formed in one end of the shell, and the metal sheet can movably penetrate through the opening of the shell.

3. The vehicle key with antenna function according to claim 1, characterized in that: the circuit board is contained in the shell, and a notch is formed in one side of the circuit board and used for containing the metal sheet.

4. The vehicle key with antenna function according to claim 3, characterized in that: the feed-in part extends from one side of the circuit board to the direction of the notch straightly.

5. The vehicle key with antenna function according to claim 4, characterized in that: the metal sheet comprises a first end part and a second end part opposite to the first end part, when the metal sheet is accommodated in the notch, the feed-in part is contacted with the first end part of the metal sheet, and when the metal sheet is partially exposed out of the shell, the feed-in part is contacted with the second end part of the metal sheet.

6. The vehicle key with antenna function according to claim 1, characterized in that: the signal source provides a driving current for the regulating circuit.

7. The vehicle key with antenna function according to claim 6, characterized in that: the first switching circuit is a variable capacitor and is electrically connected between the signal source and the metal sheet, the second switching circuit is a variable inductor, one end of the second switching circuit is electrically connected between the first switching circuit and the metal sheet, and the other end of the second switching circuit is grounded.

8. The vehicle key with antenna function according to claim 1, characterized in that: the sensor is a proximity sensor or a light sensor.

9. The utility model provides a wearing formula electron device, its includes the body and sets up the car key of utensil antenna function on the body, its characterized in that: the vehicle key with the antenna function is the vehicle key with the antenna function as claimed in any one of claims 1 to 8.