CN213546179U - Key module, input device and mouse - Google Patents
Key module, input device and mouse Download PDFInfo
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- CN213546179U CN213546179U CN202022977255.7U CN202022977255U CN213546179U CN 213546179 U CN213546179 U CN 213546179U CN 202022977255 U CN202022977255 U CN 202022977255U CN 213546179 U CN213546179 U CN 213546179U
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Abstract
The utility model provides a key module. The key module comprises a pressing body and a key switch. The key switch comprises a first electrode, a second electrode and a third electrode, wherein the first electrode, the second electrode and the third electrode are provided with two ends, the third electrode is electrically connected with one end of the first electrode, the pressing body is pressed down or moved up to enable the other end of the first electrode to be mutually conducted or separated and disconnected with the second electrode, when the other end of the first electrode is mutually conducted with the second electrode, the first electrode, the second electrode and the third electrode are connected in series to form a passage, and when the other end of the first electrode is mutually separated with the second electrode, the first electrode, the second electrode and the third electrode are connected in series to form an open circuit. The utility model provides a button module input speed is fast, the simple installation. Simultaneously the utility model also provides an input device and mouse that adopt above-mentioned button module.
Description
Technical Field
The utility model relates to a key switch, in particular to be used for capacitanc mechanical button as input system's button module, input device and mouse.
Background
With the development of modern electronic technology, electronic products gradually go deep into the lives of people, and various electronic products such as telephones, mobile phones, notebook computers, remote controllers and the like accompany the daily lives of people.
The role played by the input device of the electronic product is particularly important. The key module adopted in the prior art mainly adopts a membrane switch as a switch element, and when the key is pressed down, the pressure is applied to the membrane switch to drive the membrane switch to be conducted so as to convert a physical mechanical input signal into an electronic input signal and realize input action.
However, the above technical solution still has the following drawbacks:
firstly, the distance between the electrodes of the membrane switch is short, so that the keys are prevented from being touched by mistake, the pressing stroke of the keys is long, and the input speed is slow;
secondly, in order to improve the pressing hand feeling, the key element for transmitting physical and mechanical signals is complex in design and inconvenient to assemble.
Therefore, it is necessary to provide a new key module to solve the technical problems of slow input speed and inconvenient assembly of the key module in the prior art.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that the input speed of the key module is slow and the assembly is inconvenient in the prior art, the utility model provides a fast and simple and convenient key module of equipment of input speed. Meanwhile, an input device and a mouse adopting the key module are also provided.
The utility model provides a key module, which comprises a pressing body and a key switch, wherein the key switch is abutted against the pressing body, the key switch comprises a first electrode, a second electrode and a third electrode which are provided with two ends, the first electrode is elastically abutted with the pressing body, the third electrode is electrically connected with one end of the first electrode, the second electrode and the third electrode are oppositely arranged at intervals, the pressing body is pressed downwards or moves upwards to enable the other end of the first electrode and the second electrode to be mutually conducted or separated, when the other end of the first electrode is conducted with the second electrode, the first electrode, the second electrode and the third electrode are connected in series to form a path, when the other end of the first electrode is separated from the second electrode, the first electrode, the second electrode and the third electrode are connected in series to form an open circuit.
In a preferred embodiment of the key module, the key module further includes a capacitor circuit, the capacitor circuit is connected in series with the circuit formed by the series connection between the first electrode, the second electrode and the third electrode, the capacitor circuit includes a fixed capacitor or a plurality of fixed capacitors, and the plurality of fixed capacitors are connected in series or in parallel to each other to form an output capacitor.
The present invention provides a key module, wherein the capacitor circuit is an adjustable capacitor, and comprises a plurality of branches, each branch is connected in series with the circuit formed by the series connection among the first electrode, the second electrode and the third electrode, each branch comprises at least one branch switch, and the branch switch is closed or disconnected to make the output of the capacitor circuit correspond to the set capacitance value.
In a preferred embodiment of the key module, the third electrode includes a first abutting end, a connecting plate and a second abutting end, the first abutting end and the second abutting end are connected through the connecting plate, and the first abutting end, the second abutting end and one of the ends of the first electrode are electrically connected.
In a preferred embodiment of the key module, the first electrode includes a first abutting through hole and a second abutting through hole, the first abutting end is penetrated out from the first abutting through hole, and the second abutting end is penetrated out from the second abutting through hole.
In a preferred embodiment of the key module, the first electrode further includes an arc-shaped abutting end, the arc-shaped abutting end is an arc-shaped sheet structure formed by extending a side edge of the first abutting through hole, the first abutting end includes a first limit notch, the arc-shaped abutting end is inserted into the first limit notch, the second abutting end includes a second limit notch, and a side edge of the second abutting through hole is inserted into the second limit notch.
In a preferred embodiment of the key module provided in the present invention, the first electrode is a conductive elastomer.
In a preferred embodiment of the key module, the key module further includes a limiting structure, the limiting structure is disposed opposite to the second electrode, and the third electrode is disposed on a different side of the second electrode, and the pressing body is pressed down or moved up to contact or separate the limiting structure and the other end of the first electrode.
An input device comprises a key module, a capacitance detection module and a control module, wherein the key module receives a physical pressing signal and correspondingly feeds back a capacitance change signal, the capacitance detection module receives the capacitance change signal from the key module and judges the working state of the key module to generate a working state signal, the control module receives the working state signal from the capacitance detection module and correspondingly generates an input signal, the key module comprises a pressing body and a key switch, the key switch is abutted against the pressing body, the key switch comprises a first electrode, a second electrode and a third electrode which are provided with two ends, the first electrode is abutted against the pressing body in an elastic manner, the third electrode is electrically connected with one end of the first electrode, and the second electrode and the third electrode are oppositely arranged at intervals, the pressing body is pressed downwards or moved upwards to enable the other end of the first electrode to be mutually conducted or separated with the second electrode, when the other end of the first electrode is mutually conducted with the second electrode, the first electrode, the second electrode and the third electrode are connected in series to form a passage, and when the other end of the first electrode is mutually separated with the second electrode, the first electrode, the second electrode and the third electrode are connected in series to form an open circuit.
A mouse comprises two oppositely arranged key modules, an intermediate wheel, a capacitance detection module and a control module, wherein the intermediate wheel is arranged between the two key modules, the capacitance detection module is electrically connected with the key modules, the control module correspondingly generates an input signal according to a detection result of the capacitance detection module, the key modules comprise a pressing body and a key switch, the key switch is abutted against the pressing body, the key switch comprises a first electrode, a second electrode and a third electrode which are arranged at two ends, the first electrode is elastically abutted against the pressing body, the third electrode is electrically connected with one end of the first electrode, the second electrode is arranged at an interval relative to the third electrode, the pressing body is pressed down or moved up to enable the other end of the first electrode to be mutually conducted or separated with the second electrode, when the other end of the first electrode is mutually conducted with the second electrode, the first electrode, the second electrode and the third electrode are connected in series to form a passage, and when the other end of the first electrode is mutually separated from the second electrode, the first electrode, the second electrode and the third electrode are connected in series to form an open circuit.
Compared with the prior art, the utility model provides a button module presses the stroke short, press the body direct action first electrode, thereby make it forms the route or opens circuit to establish ties between first electrode, second electrode and the third electrode, realizes quick input, and does not have the transmission of multiple physics mechanical force, and the design is more simple and convenient, easy installation.
On the other hand, the second electrode and the third electrode are fixedly arranged, only the first electrode is deformed by physical mechanical force, and the key module is high in stability, not easy to damage and simpler and more convenient to install.
In addition, the arrangement of the capacitor circuit is increased, so that the requirement of the key module on the contact sensitivity between the first electrode and the second electrode is reduced, the production cost is reduced, and the input precision is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a schematic view of a three-dimensional assembly structure of a key module according to the present invention;
FIG. 2 is a perspective exploded view of the key module shown in FIG. 1;
FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1;
FIG. 4 is a perspective view of a base of the key module shown in FIG. 1;
FIG. 5 is a perspective exploded view of a key switch of the key module shown in FIG. 1;
FIG. 6a and FIG. 6b are side sectional views of the key module shown in FIG. 1 in two working states, i.e., an inactivated state and an activated state, respectively;
fig. 7 is a block diagram of an input device according to the present invention;
fig. 8 is a schematic perspective view of the mouse of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Please refer to fig. 1, fig. 2 and fig. 3, in which fig. 1 is a schematic diagram of a three-dimensional assembly structure of a key module according to the present invention, fig. 2 is a schematic diagram of a three-dimensional exploded view of the key module shown in fig. 1, and fig. 3 is a cross-sectional view along the line III-III shown in fig. 1. The key module 10 includes a housing 11, a pressing body 13, a limiting structure 15, a key switch 17, a capacitor circuit 18 and a circuit board 19.
The housing 11 includes an upper cover 111 and a base 113, and the upper cover 111 is provided with a lead through hole 1111.
Referring to fig. 4, which is a schematic perspective view of the base of the key module shown in fig. 1, the base 113 includes a first limiting through hole 1131, a second limiting through hole 1133, and a third limiting through hole 1135, which are sequentially disposed in parallel. The upper cover 111 cooperates with the base 113 through a snap-fit structure to form an accommodating space for accommodating the pressing body 13, the limiting structure 15 and the key switch 17 therein.
The pressing body 13 includes a pressing end 131 and a working surface 133, the pressing end 131 penetrates the lead through hole 1111, and presses down or moves up along the through hole 1111 in response to an external physical pressing signal, and the working surface 133 abuts against the key switch 17 to transmit a pressing force to the key switch 17.
The circuit board 19 is disposed on a side of the base 113 away from the pressing body 13, and includes a first pad 191, a second pad 193, and a third pad 195, corresponding to the first limiting through hole 1131, the second limiting through hole 1133, and the third limiting through hole 1135.
Referring to fig. 5, which is a schematic exploded perspective view of the key switch of the key module shown in fig. 1, the key switch 17 is abutted against the working surface 133 of the pressing body 13, and includes a first electrode 171, a second electrode 173, and a third electrode 175 at two ends, the first electrode 171 is elastically abutted against the working surface 133 of the pressing body 13, the third electrode 175 is electrically connected to one end of the first electrode 171, the second electrode 173 and the third electrode 175 are oppositely disposed at an interval, the pressing body 13 is pressed down or moved up to make the other end of the first electrode 171 and the second electrode 173 electrically connected or separated and disconnected, when the other end of the first electrode 171 and the second electrode 173 are electrically connected, a passage is formed between the first electrode 171, the second electrode 173, and the third electrode 175 in series, and when the other end of the first electrode 171 and the second electrode 173 are separated and disconnected, the first electrode 171, the second electrode 173 and the third electrode 175 are connected in series to form an open circuit.
The first electrode 171 is a conductive elastic sheet, one end of which is provided with a first abutting through hole 1711, a second abutting through hole 1713 and an arc abutting end 1715, and is electrically connected with the third electrode 175, and the other end of which is provided with a first conducting end 1717. The arc-shaped abutting end 1715 is an arc-shaped sheet-shaped structure formed by extending from one side of the first abutting through hole 1711, and the first conducting end 1717, the first abutting through hole 1711 and the second abutting through hole 1713 are sequentially connected. The pressing body 13 is pressed down or moved up to make the first conductive end 1717 and the second electrode 173 electrically connected or separated from each other, so that the first electrode 171, the second electrode 173 and the third electrode 173 are connected in series to form a connection or a disconnection.
The second electrode 173 includes a fixed end 1731 and a second conducting end 1733, the fixed end 1731 penetrates through the second limiting through hole 1133 and is fixed to the circuit board 19 by soldering through the second bonding pad 193, and the pressing body 13 presses down or moves up to make the first conducting end 1717 and the second conducting end 1733 conduct or separate with each other, so that the first electrode 171, the second electrode 173 and the third electrode 173 are connected in series to form a circuit or an open circuit.
It should be understood that, as a further improvement of the above embodiment, the first electrode 171 is not limited to a conductive elastic sheet, but may be other conductive elastic bodies, and all the elements are used as elastic electrical connection elements for realizing the pressing or moving of the pressing body 13, so that the first electrode 171, the second electrode 173 and the third electrode 175 are connected in series to form a circuit or an open circuit.
The limit structure 15 is accommodated in an accommodating space defined by the upper cover 111 and the base 113, is arranged opposite to the second electrode 173, is arranged on the opposite side of the second electrode 173 to the third electrode 175, one end of the limit structure 15 penetrates through the first limit through hole 1131, and is welded and fixed on the circuit board 19 through the first pad 191, the other end of the limit structure 15 is provided with a limit stopper 151, and the pressing body 13 presses down or moves up to make the limit stopper 151 and the first conduction end 1717 of the first electrode 171 separate from or contact with each other.
The capacitor circuit 18 is disposed on the circuit board 19, and the capacitor circuit 18 is disposed in series with a circuit formed by the first electrode 171, the second electrode 173, and the third electrode 175 connected in series. In this embodiment, the capacitor circuit 18 is a fixed capacitor, as a further improvement of this embodiment, the capacitor circuit 18 may further include multiple fixed capacitors, the multiple fixed capacitors are connected in series or in parallel to form multiple branches, each branch is connected in series with a circuit formed by connecting the first electrode, the second electrode, and the third electrode in series, each branch includes at least one branch switch, the branch switch may be turned on or off to enable the capacitor circuit 18 to output a correspondingly set capacitance value, that is, the capacitor circuit is an adjustable capacitor, and the branch switch may be turned on or off to adjust the capacitance value of the capacitor circuit 18, so as to adjust the capacitance value change of the key module 10.
Please refer to fig. 6a and 6b, which respectively represent side cross-sectional views of the key module 10 in different working states, where fig. 6a shows that the pressing body 13 is not pressed, the key switch 17 is in an off state, and the key module 10 is in an inactive state, and fig. 6b shows that the pressing body 13 is pressed, the key switch 17 is in an on state, and the key module 10 is in an active state. When the key module 10 works, an external physical force acts on the pressing end 131, the pressing body 13 presses down along the through hole 1111, the working surface 133 transmits the pressure to the first electrode 171, the first electrode 171 elastically deforms, the first conducting end 1717 is separated from the limit stop 151 and is in contact conduction with the second conducting end 1733, and the first electrode 171, the second electrode 173, and the third electrode 175 are connected in series to form a passage, that is: the key switch 17 responds to the external physical pressing signal and triggers the key switch 17 to be in a conducting state; when the external pressure is removed, the first conductive end 1717 and the second conductive end 1733 are separated and disconnected due to the first electrode 171 recovering its own deformation, and are abutted against the limit stop 151, so that the first electrode 171, the second electrode 173, and the third electrode 175 are connected in series to form an open circuit, that is: the key switch 17 responds to the external physical pressing signal and triggers the key switch 17 to be in an off state.
When the key switch 17 is set to be turned off, it forms an open circuit, and the capacitance of the key switch 17 is set to be equal to the smaller relative capacitance C1 existing between the first electrode 171 and the second electrode 173; if the capacitance value of the capacitor circuit 18 is set to C0, and the capacitance value of C0 is set to be much larger than that of C1, when the key switch 17 is turned off, the capacitance value of the branch formed by the key switch 17 and the capacitor circuit 18 in series is C1 × C0/(C1+ C0), and if the value of C0 is small, the total capacitance value of the branch formed by the key switch 17 and the capacitor circuit 18 in series is correspondingly small.
When the key switch 17 is turned on, it forms a short circuit, and at this time, the capacitance value C of the branch formed by the key switch 17 and the capacitor circuit 18 in series is C0. When the key switch 17 is switched between off and on, the value of C1 is small, the value of C0 is much larger than the value of C1, and then the capacitance value of the branch formed by connecting the key switch 17 and the capacitor circuit 18 in series changes greatly, so that the working state of the key switch 17 is determined according to the amplitude of the capacitance value change of the branch formed by connecting the key switch 17 and the capacitor circuit 18 in series, and the working state can also be used as a basis for determining whether the pressing body 13 is pressed down.
In summary, with the application of the external pressure, the pressing body 13 moves up or down back and forth under the guidance of the lead through hole 1111, the capacitance value of the branch formed by the serial connection of the key switch 17 and the capacitance circuit 18 changes greatly, and the working state of the key switch 17 is determined to be in the on or off state according to the change of the capacitance value, and the change is also used as the basis for determining whether the pressing body 13 is pressed down. That is, under the action of the external pressure, the first electrode 171 and the second electrode 173 of the key switch 17 are switched between being contacted with or separated from each other, that is, the first electrode 171, the second electrode 173 and the third electrode 175 are serially connected to switch between being on or off, and accordingly, the operating state of the key switch 17 is adjusted to be continuously switched between the on state and the off state. When the key switch 17 is in the on state, the key module 10 is activated and is regarded as valid input; when the key switch 17 is in the off state, the key module 10 is not activated and is regarded as an invalid input.
In particular, if the key switch 17 is in poor contact, that is, the first conducting end 1717 and the second conducting end 1733 are very close to each other, the relative capacitance C1 between the first electrode 171 and the second electrode 173 is significantly increased when the key switch 17 is turned off, and the capacitance C of the branch formed by the key switch 17 and the capacitor circuit 18 in series is C1C 0/(C1+ C0), which corresponds to a large change in C. In the present embodiment, the operating state of the key switch 17 and whether or not the pressing body 13 is pressed are determined based on the change in the capacitance value C, so that even if the key switch 17 is in poor contact, the key module 10 is activated due to a large change in C, and is regarded as an effective input.
Compared with the prior art, the utility model provides a key module 10 presses the stroke short, press body 13 direct action first electrode 171, thereby make establish ties between first electrode 171, second electrode 173 and the third electrode 175 and form the route or open circuit, realize quick input, and do not have the transmission of multiple physics mechanical force, the design is more simple and convenient, easy installation.
On the other hand, the second electrode 173 and the third electrode 175 are fixedly arranged, and only the first electrode 171 is deformed by physical mechanical force, so that the key module is high in stability, not easy to damage and simpler and more convenient to install.
Moreover, the arrangement of the capacitor circuit 18 is increased, so that the requirement of the key module 10 on the contact sensitivity between the first electrode 171 and the second electrode 173 is reduced, the production cost is reduced, and the input precision is improved.
Please refer to fig. 7, which is a block diagram of an input device according to the present invention. The input device 20 includes a key module 21, a capacitance detection module 23 and a control module 25.
The key module 21 receives the physical pressing signal and correspondingly feeds back the capacitance change signal.
The capacitance detection module 23 detects a capacitance change signal of the key module 21, and determines a working state of the key module 21 according to a capacitance change result, specifically, the key module 21 includes a trigger working state and a non-trigger working state, and when the key module 21 is pressed, the key module is correspondingly in the trigger state, and when the key module 21 is not pressed, the key module is correspondingly in the non-trigger state.
The control module 25 receives the judgment result from the capacitance detection module 23, and generates an input signal according to the working state of the key module 21. Specifically, when the input device 20 is a mouse, the operator intends to click a web site. When the mouse button is pressed, the capacitance value of the button module 21 corresponding to the mouse button is increased; correspondingly, the capacitance detection module 23 judges that the key module 21 is in a trigger state according to the capacitance change value; the control module 25 generates a control signal for clicking the website according to the trigger state of the key module 21, so as to realize the input operation of clicking the website.
In the input device 20, the key module 21 is the key module 10 disclosed in the first embodiment.
Please refer to fig. 8, which is a perspective view of a mouse according to the present invention. The mouse 30 includes two key modules 35, a middle wheel 37, a capacitance detecting module 38, and a control module 39. The middle wheel 37 is arranged between the two key modules 35, the capacitance detection module 38 is electrically connected with the key modules 35, the control module 39 correspondingly generates an input signal according to the detection result of the capacitance detection module 38, and the key modules 35 adopt the key module 10.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.
Claims (10)
1. A key module, comprising:
a pressing body;
the key switch, with press the body butt, its characterized in that, the key switch includes:
a first electrode having two ends, elastically abutting against the pressing body;
a third electrode electrically connected to one end of the first electrode;
the pressing body is pressed downwards or moves upwards to enable the other end of the first electrode to be mutually conducted or separated from the second electrode, when the other end of the first electrode is mutually conducted with the second electrode, the first electrode, the second electrode and the third electrode are connected in series to form a passage, and when the other end of the first electrode is mutually separated from the second electrode, the first electrode, the second electrode and the third electrode are connected in series to form an open circuit.
2. The key module of claim 1, further comprising a capacitor circuit, wherein the capacitor circuit is connected in series with a circuit formed by the first electrode, the second electrode and the third electrode, and the capacitor circuit comprises a fixed capacitor or a plurality of fixed capacitors, and the plurality of fixed capacitors are connected in series or in parallel to output capacitance.
3. The key module of claim 2, wherein the capacitor circuit is an adjustable capacitor, and comprises a plurality of branches, each branch is connected in series with a circuit formed by the first electrode, the second electrode and the third electrode, and each branch comprises at least one branch switch, and the branch switch is turned on or off to enable the capacitor circuit to output a corresponding set capacitance value.
4. The key module of claim 1, wherein the third electrode comprises a first abutting end, a connecting plate and a second abutting end, the first abutting end and the second abutting end are connected through the connecting plate, and the first abutting end and the second abutting end are electrically connected to one end of the first electrode.
5. The key module of claim 4, wherein the first electrode comprises a first abutting through hole and a second abutting through hole, the first abutting end penetrates out of the first abutting through hole, and the second abutting end penetrates out of the second abutting through hole.
6. The key module of claim 5, wherein the first electrode further comprises an arc-shaped abutting end, the arc-shaped abutting end is an arc-shaped sheet-shaped structure formed by extending from one side of the first abutting through hole, the first abutting end comprises a first limiting notch, the arc-shaped abutting end is inserted into the first limiting notch, the second abutting end comprises a second limiting notch, and one side of the second abutting through hole is inserted into the second limiting notch.
7. The key module of claim 1, wherein the first electrode is a conductive elastomer.
8. The key module according to claim 1, further comprising a limiting structure, wherein the limiting structure is disposed opposite to the second electrode, and disposed on a side opposite to the second electrode with respect to the third electrode, and the pressing body presses down or moves up to make the limiting structure contact with or separate from the other end of the first electrode.
9. An input device, comprising:
the key module receives the physical pressing signal and correspondingly feeds back the capacitance change signal;
the capacitance detection module receives the capacitance change signal from the key module, judges the working state of the key module and generates a working state signal;
the control module receives the working state signal from the capacitance detection module and generates an input signal correspondingly, wherein the key module is the key module according to any one of claims 1 to 8.
10. The utility model provides a mouse, includes two relative button modules that set up, middle wheel, electric capacity detection module and control module group, the middle wheel is located between two button modules, electric capacity detection module with button module electricity is connected, control module group basis electric capacity detection module's testing result corresponds produces input signal, its characterized in that: the key module is as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022977255.7U CN213546179U (en) | 2020-12-09 | 2020-12-09 | Key module, input device and mouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022977255.7U CN213546179U (en) | 2020-12-09 | 2020-12-09 | Key module, input device and mouse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213546179U true CN213546179U (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022977255.7U Active CN213546179U (en) | 2020-12-09 | 2020-12-09 | Key module, input device and mouse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213546179U (en) |
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2020
- 2020-12-09 CN CN202022977255.7U patent/CN213546179U/en active Active
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