CN213633721U - Key detection device and electronic equipment - Google Patents
Key detection device and electronic equipment Download PDFInfo
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- CN213633721U CN213633721U CN202021189701.1U CN202021189701U CN213633721U CN 213633721 U CN213633721 U CN 213633721U CN 202021189701 U CN202021189701 U CN 202021189701U CN 213633721 U CN213633721 U CN 213633721U
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Abstract
The utility model provides a key detection device and an electronic device, wherein the key detection device is connected with N keys; n keys are connected in parallel, and N is greater than or equal to 2; the key detection device includes: one end of the power supply module is connected with one end of each key; one end of each conduction module is connected with the other end of the corresponding key; one end of the voltage division module is connected with the other end of each conduction module; and one end of the key detection module is connected with the other end of the voltage division module. Button detection device and electronic equipment can effectively avoid the button spurious triggering problem, has promoted user experience and has felt.
Description
Technical Field
The utility model belongs to the technical field of the circuit, a device is related to, especially relate to a button detection device and electronic equipment.
Background
With the development of automobile technology, automobile functions are more and more. In order to meet various requirements of customers, the optional configurations of vehicles are more and more, the configurations are more and more personalized, and before a host computer on a general vehicle leaves a factory, some function keys are configured for the customers in advance to manage and set various functions, but the keys on the vehicle are frequently pressed, so that the contact impedance is easily increased after a long time, and the problems of key false triggering and the like are caused.
Therefore, how to provide a key detection device to solve the defects that the prior art cannot avoid the false triggering of the key and the like has become a technical problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of the above prior art's shortcoming, the utility model aims to provide a button detection device and car machine end for solve the problem that prior art can't avoid the button spurious triggering.
In order to achieve the above and other related objects, one aspect of the present invention is to provide a key detection device, which is connected to N keys; n keys are connected in parallel, and N is greater than or equal to 2; the key detection device includes: one end of the power supply module is connected with one end of each key; one end of each conduction module is connected with the other end of the corresponding key; one end of the voltage division module is connected with the other end of each conduction module; and one end of the key detection module is connected with the other end of the voltage division module.
In an embodiment of the present invention, the key detection device further includes a first current limiting module disposed between the power supply module and the key.
In an embodiment of the present invention, the first current limiting module includes at least one first current limiting resistor.
In an embodiment of the present invention, the key detection device further includes a second current limiting module disposed between each of the switch-on module and each of the keys.
In an embodiment of the present invention, the second current limiting module includes at least one second current limiting resistor.
In an embodiment of the present invention, the voltage dividing module includes a voltage dividing resistor; the voltage division module is composed of a first resistor, a second resistor, a third resistor, … and/or an Nth resistor which are connected in series.
In an embodiment of the present invention, the conducting module includes a pull-down resistor and a transistor; one end of the pull-down resistor is connected with one end of the second current-limiting resistor, and the other end of the pull-down resistor is grounded; the base electrode of the triode is connected with one end of the pull-down resistor, the collector electrode of the triode is connected with one end of the divider resistor, and the emitting electrode of the triode is grounded.
In an embodiment of the present invention, a collector of a triode of the ith conduction module is connected to one end of an ith resistor, and the other end of the ith resistor is connected to one end of an i-1 th resistor; wherein i is greater than or equal to N-1 and less than or equal to 2. The voltage division module connected with the ith conduction module comprises a first resistor, a second resistor, a third resistor, … and an ith resistor which are connected in series.
In an embodiment of the present invention, a collector of a triode of the nth conducting module is connected to one end of an nth resistor, and the other end of the nth resistor is connected to one end of an N-1 th resistor; the voltage division module connected with the Nth conduction module comprises a first resistor, a second resistor, a third resistor … and an Nth resistor which are connected in series; a collector of a triode of the first conduction module is connected with one end of a first resistor, and the other end of the first resistor is connected with one end of the key detection module; the voltage division module connected with the first conduction module comprises a first resistor.
The utility model discloses another aspect provides an electronic equipment, include: n keys; n keys are connected in parallel, and N is more than or equal to 2; and the key detection device is connected with the N keys.
As described above, the utility model discloses a button detection device and electronic equipment has following beneficial effect:
button detection device and electronic equipment can effectively avoid the button spurious triggering problem, has promoted user experience and has felt.
Drawings
Fig. 1 is a schematic plan view of a key panel used in the present invention.
Fig. 2 is a schematic view of a key detection device according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an implementation circuit of the key detection device according to an embodiment of the present invention.
Description of the element reference numerals
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Referring to fig. 1 to 3, embodiments of the present invention are described below by specific examples, and other advantages and effects of the present invention can be easily understood by those skilled in the art from the disclosure of the present specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.
Example one
The utility model provides a key detection device which is connected with N keys; n keys are connected in parallel, and N is greater than or equal to 2; the key detection device includes:
one end of the power supply module is connected with one end of each key;
one end of each conduction module is connected with the other end of the corresponding key;
one end of the voltage division module is connected with the other end of each conduction module;
and one end of the key detection module is connected with the other end of the voltage division module.
The key detection device provided in the present embodiment will be described in detail with reference to the drawings. The key detecting device of the present embodiment can be applied to a key panel, such as the key panel 1 shown in fig. 1, where the key panel 1 includes 3 keys connected in parallel, that is, a multimedia playing key (Media key) 11, a broadcasting key (Radio key) 12, and an electronic navigation key (Navi key) 13. In this embodiment, the multimedia video/audio play button (Media button) 11 employs K11 and K11' conductive rubber; the broadcast key (Radio key) 12 adopts K12 and K12' conductive rubber; the electronic navigation key (Navi key) 13 adopts K13 and K13' conductive rubber.
Please refer to fig. 2 and fig. 3, which are schematic structural diagrams of a key detection apparatus in an embodiment and an implementation circuit diagram of the key detection apparatus in an embodiment, respectively. As shown in fig. 2, the key detection apparatus 2 includes a power supply module 20, a first current limiting module 21, N second current limiting modules 22, N conducting modules 23, a voltage dividing module 24, and a key detection module 25.
The power supply module 20 is configured to supply power to the key detection device 2. One end of the power supply module 20 is connected to one end of each of the keys.
In this embodiment, the first current limiting module 21 is respectively disposed between the power supply module 20 and the multimedia video/audio playing key (Media key) 11, the broadcasting key (Radio key) 12, and the electronic navigation key (Navi key) 13. The first current limiting module 21 is configured to limit a current flowing to the conducting module 23.
Specifically, the first current limiting module 21 includes at least one first current limiting resistor. For example, as shown in fig. 3, the first current limiting module 21 employs a first current limiting resistor R11.
Each second current limiting module 22 is respectively disposed between each key and each conducting module 23, and is configured to further limit a current flowing to the conducting module 23.
Specifically, the second current limiting module 22 includes at least one second current limiting resistor. For example, as shown in fig. 3, the second current limiting module 22 between the multimedia playback key (Media key) 11 and the conducting module 23 (third conducting module) adopts a second current limiting resistor R22, the second current limiting module 22 between the broadcast key (Radio key) 12 and the conducting module 23 (second conducting module) adopts a second current limiting resistor R22, and the second current limiting module 22 between the electronic navigation key (Navi key) 13 and the conducting module 23 (first conducting module) adopts a second current limiting resistor R22.
Each conducting module 23 is connected to a second current limiting module 22 and a voltage dividing module 24. In this embodiment, the turn-on module 23 includes a pull-down resistor R33 and a transistor Q1/Q2/Q3;
referring to fig. 3, one end of the pull-down resistor R33 is connected to one end of the second current limiting resistor R22, and the other end of the pull-down resistor R23 is grounded; the base B of the triode Q1/Q2/Q3 is connected with one end of the pull-down resistor R33, the collector C of the triode Q1/Q2/Q3 is connected with the output end of the voltage dividing resistor, and the emitter E of the triode Q1/Q2/Q3 is grounded.
The output end of the voltage dividing module 24 is connected with the output end of each conducting module 23. The voltage dividing module 24 includes a voltage dividing resistor, and specifically, the voltage dividing module 24 is composed of a first resistor R1, a second resistor R2, a third resistor R3, … and/or an nth resistor RN connected in series.
The specific connection relationship between the voltage dividing module 24 and the conducting module 23 is as follows:
a collector of a triode QN of the Nth conduction module is connected with one end of an Nth resistor, and the other end of the Nth resistor is connected with one end of an N-1 th resistor; the voltage division module connected with the Nth conduction module comprises a first resistor R1, a second resistor R2, third resistors R3 and … and an Nth resistor RN which are connected in series.
The collector of a triode Qi of the ith conduction module is connected with one end of an ith resistor, and the other end of the ith resistor is connected with one end of an i-1 resistor; wherein i is greater than or equal to N-1 and less than or equal to 2. The voltage division module connected with the ith conduction module comprises a first resistor R1, a second resistor R2, third resistors R3 and … and an ith resistor Ri which are connected in series.
A collector of a triode Q1 of the first conduction module is connected with one end of a first resistor, and the other end of the first resistor is connected with one end of the key detection module; the voltage division module connected with the first conduction module comprises a first resistor.
As shown in fig. 3, the voltage dividing module 24 of the present embodiment is composed of a first resistor R1, a second resistor R2, and a third resistor R3 connected in series.
A collector C of a triode Q3 of the third conduction module is connected with one end of a third resistor R3, the other end of the third resistor R3 is connected with one end of a second resistor R2, the other end of the second resistor R2 is connected with one end of a first resistor R1, and the other end of the first resistor R1 is connected with the output end of the key detection module 25; at this time, the voltage dividing module 24 connected to the third turn-on module includes a first resistor R1, a second resistor R2, and a third resistor R3 connected in series.
The collector C of the transistor Q2 of the second conduction module is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to one end of the first resistor R1, and the other end of the first resistor R1 is connected to the output end of the key detection module 25. At this time, the voltage dividing module 24 connected to the second turn-on module includes a first resistor R1 and a second resistor R2 connected in series.
The collector C of the transistor Q1 of the first conducting module is connected to one end of the first resistor R1, and the other end of the first resistor R1 is connected to the output end of the key detection module 25. In this case, the voltage dividing module 24 connected to the first conduction module includes a first resistor R1.
The key detection module 25 connected to the voltage dividing module 24 is configured to determine a key pressed by a user according to different voltages generated by the voltage dividing module 24. In this embodiment, the key detection module is a processor.
In particular, the amount of the solvent to be used,
when a user presses a multimedia video playing key (Media key) 11, current generated by a 3.3V power supply flows to a base B of Q3 of a third conducting module through the multimedia video playing key (Media key) 11, a triode Q3 is conducted after the base B of Q3 generates the current, a voltage division module 24 composed of a first resistor R1, a second resistor R2 and a third resistor R3 is connected to the power supply of a key detection module 25, the current is grounded GND through a triode Q3, and the key detection module 25 judges that the Media key 11 is pressed by detecting the voltage generated by the voltage division module 24 (composed of the first resistor R1, the second resistor R2 and the third resistor R3).
When a user presses the Radio key (Radio key) 12, the current generated by the 3.3V power flows to the base B of Q2 of the second conducting module through the Radio key (Radio key) 12, after the current is generated by the base B of Q2, the triode Q2 is turned on, the voltage dividing module 24 composed of the first resistor R1 and the second resistor R2 is connected to the power of the key detection module 25, the current is grounded GND through the triode Q2, and the key detection module 25 judges that the Radio key 12 is pressed by detecting the voltage generated by the voltage dividing module 24 (by the first resistor R1 and the second resistor R2)
When a user presses an electronic navigation key (Navi key) 13, current generated by a 3.3V power supply flows to a base B of Q1 of a first conduction module through the electronic navigation key (Navi key) 13, after the base B of Q1 generates the current, a triode Q1 is conducted, a voltage division module 24 composed of a first resistor R1 is connected to the power supply of a key detection module 25, the current passes through the triode Q1 and is grounded GND, and the key detection module 25 judges that the Navi key 11 is pressed by detecting the voltage generated by the voltage division module 24 (by a first resistor R1).
This embodiment button detection device can effectively avoid the button spurious triggering problem, has promoted user experience and has felt.
Example two
The embodiment provides an electronic device, which includes N keys and a key detection device connected to the N keys; wherein, N buttons are connected in parallel, and N is more than or equal to 2. The specific structure of the key detection device is the same as that described in the first embodiment, and is not described herein again. The electronic device is, for example, a car end.
To sum up, button detection device and electronic equipment can effectively avoid button spurious triggering problem, have promoted user experience and have felt. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A key detection device is characterized in that the device is connected with N keys; n keys are connected in parallel, and N is greater than or equal to 2; the key detection device includes:
one end of the power supply module is connected with one end of each key;
one end of each conduction module is connected with the other end of the corresponding key;
one end of the voltage division module is connected with the other end of each conduction module;
and one end of the key detection module is connected with the other end of the voltage division module.
2. The key detection device of claim 1, wherein: the key detection device also comprises a first current limiting module arranged between the power supply module and the key.
3. The key detection device of claim 2, wherein: the first current limiting module comprises at least one first current limiting resistor.
4. The key detection device of claim 1, wherein: the key detection device also comprises a second current limiting module arranged between each conduction module and each key.
5. The key detection device of claim 4, wherein: the second current limiting module comprises at least one second current limiting resistor.
6. The key detection device of claim 5, wherein: the voltage division module comprises a voltage division resistor; the voltage division module is composed of a first resistor, a second resistor, a third resistor, … and an Nth resistor which are connected in series.
7. The key detection device of claim 6, wherein: the conduction module comprises a pull-down resistor and a triode; one end of the pull-down resistor is connected with one end of the second current-limiting resistor, and the other end of the pull-down resistor is grounded; the base electrode of the triode is connected with one end of the pull-down resistor, the collector electrode of the triode is connected with one end of the divider resistor, and the emitting electrode of the triode is grounded.
8. The key detection device of claim 7, wherein:
a collector of a triode of the ith conduction module is connected with one end of an ith resistor, and the other end of the ith resistor is connected with one end of an (i-1) th resistor; wherein i is more than or equal to N-1 and less than or equal to 2; the voltage division module connected with the ith conduction module comprises a first resistor, a second resistor, a third resistor, … and an ith resistor which are connected in series.
9. The key detection device of claim 7, wherein:
a collector of a triode of the Nth conduction module is connected with one end of an Nth resistor, and the other end of the Nth resistor is connected with one end of an N-1 th resistor; the voltage division module connected with the Nth conduction module comprises a first resistor, a second resistor, a third resistor … and an Nth resistor which are connected in series;
a collector of a triode of the first conduction module is connected with one end of a first resistor, and the other end of the first resistor is connected with one end of the key detection module; the voltage division module connected with the first conduction module comprises a first resistor.
10. An electronic device, comprising:
n keys; n keys are connected in parallel, and N is greater than or equal to 2;
a key press detection device as claimed in any one of claims 1 to 9 connected to N keys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021189701.1U CN213633721U (en) | 2020-06-23 | 2020-06-23 | Key detection device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021189701.1U CN213633721U (en) | 2020-06-23 | 2020-06-23 | Key detection device and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN213633721U true CN213633721U (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021189701.1U Active CN213633721U (en) | 2020-06-23 | 2020-06-23 | Key detection device and electronic equipment |
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|---|---|
| CN (1) | CN213633721U (en) |
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- 2020-06-23 CN CN202021189701.1U patent/CN213633721U/en active Active
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