Wireless keyboard using miniature capacitive proximity sensor as key

Abstract

The utility model discloses a wireless keyboard using miniature capacitive proximity sensors as keys. The wireless keyboard comprises a keyboard shell and a PCBA (Printed Circuit Board Assembly) mainboard, wherein a plurality of miniature capacitive proximity sensors are integrated on the upper surface of the PCBA main board, trigger keys in one-to-one correspondence with the miniature capacitive proximity sensors are arranged above the miniature capacitive proximity sensors, each trigger key comprises an induction piece located right above the corresponding miniature capacitive proximity sensor, and when the trigger keys are pressed down, the induction pieces are connected with the miniature capacitive proximity sensors. The induction piece moves towards the miniature capacitive proximity sensor, the miniature capacitive proximity sensor inducts capacitance value changes, converts the capacitance value changes into recognizable signals and sends the recognizable signals to the PCBA main board, and the PCBA main board controls on-off operation of the corresponding keys according to the received signals. According to the utility model, the miniature capacitive proximity sensor is used as a trigger piece of the key, so that the response speed of the key can be shortened to a microsecond level, and the experience effect of players can be greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of keyboards, and particularly relates to a wireless keyboard using a micro capacitive proximity sensor as a key. Background Art

[0002] A keyboard is an instruction and data input device used to operate a computer, and is the most commonly used input device in life. Currently, keyboards include wired and wireless forms.

[0003] Currently, traditional keyboards mainly use contact switches to achieve key response operations, and the key response speed is about 10 milliseconds. This speed can no longer meet the needs of players for some current large 3D games. Therefore, in view of the above situation, a wireless keyboard using a micro capacitive proximity sensor as a key is designed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a wireless keyboard using a micro capacitive proximity sensor as a key in order to solve the above-mentioned problems.

[0005] The technical scheme adopted by the utility model is as follows: A wireless keyboard using a micro capacitive proximity sensor as a key includes a keyboard housing and a PCBA main board; wherein a plurality of micro capacitive proximity sensors are integrated on the upper surface of the PCBA main board, and a trigger key corresponding to each micro capacitive proximity sensor is arranged above each micro capacitive proximity sensor. The trigger key includes a sensing member directly above the micro capacitive proximity sensor. When the trigger key is pressed down, the sensing member moves towards the micro capacitive proximity sensor, and the micro capacitive proximity sensor senses a change in capacitance value and converts it into an identifiable signal and sends it to the PCBA main board. The PCBA main board controls the switch operation of the corresponding key according to the received signal.

[0006] In a preferred embodiment, the trigger key further includes an upper key cover, a lower key cover, an elastic member, a guiding column and a movable rod. An avoidance hole coaxial with the sensing member and the micro capacitive proximity sensor is formed in the center of the lower key cover.

[0007] In a preferred embodiment, the upper key cover and the lower key cover are covered to form an accommodating space. The movable rod, the sensing member and the elastic member are all arranged in the accommodating space. Four limiting columns protrude from the upper ends of the four corners of the lower key cover. The elastic members are four and are arranged at the four ends of the bottom of the sensing member. The elastic members are correspondingly sleeved outside the limiting columns.

[0008] In a preferred embodiment, the sensing member is installed at the bottom of the movable rod. A through hole is formed at the center of the top of the key upper cover. The lower end of the guiding column passes through the through hole and is sleeved on the upper part of the movable rod. Positioning protrusions are formed by protruding at both ends of the lower side of the guiding column, and a keycap is correspondingly clamped at the top of the guiding column.

[0009] In a preferred embodiment, heat melting columns extend downward from the four corners of the bottom of the key upper cover, and mounting hole positions corresponding to the heat melting columns are formed on the upper surface of the PCBA main board.

[0010] In a preferred embodiment, the keyboard housing includes a keyboard upper cover and a keyboard lower cover. The keyboard upper cover and the keyboard lower cover are closed to form a receiving space. The PCBA main board and the trigger key are both placed in the receiving space, and a key hole for the keycap to protrude is formed on the keyboard upper cover.

[0011] In a preferred embodiment, a lithium battery electrically connected to the PCBA main board is further provided in the receiving space, and anti-slip pads are bonded to the four corners of the bottom of the keyboard lower cover.

[0012] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows: The micro capacitive proximity sensor is used as the trigger member of the key. When the user presses the key, the sensing member above the key inside will approach the micro capacitive proximity sensor. After being captured by the sensor, the measured distance change will be converted into a change in capacitance, and then converted into an identifiable signal and sent to the PCBA main board. The PCBA main board controls the switching operation of the corresponding key according to the received signal, and the response speed of the key can be shortened to the microsecond level, which can greatly improve the experience effect of players and is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an exploded three-dimensional structural schematic diagram of the whole of the present utility model;

[0014] Figure 2 is an exploded three-dimensional structural schematic diagram of the trigger key in the present utility model;

[0015] Figure 3 is a partial three-dimensional structural schematic diagram of the PCBA main board in the present utility model;

[0016] Figure 4 is a three-dimensional structural schematic diagram of the whole of the present utility model.

[0017] Markings in the figure: 1 - keycap, 2 - upper keyboard cover, 3 - trigger button, 31 - guiding post, 32 - upper button cover, 321 - hot melt post, 33 - movable rod, 34 - sensing element, 35 - elastic element, 36 - lower button cover, 361 - limiting post, 4 - PCBA main board, 41 - micro capacitive proximity sensor, 42 - mounting hole position, 5 - anti-slip pad, 6 - lower keyboard cover, 7 - lithium battery. Detailed implementation manner

[0018] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] Refer to Figures 1-4 , a wireless keyboard using a micro capacitive proximity sensor as a key, characterized in that it includes a keyboard housing and a PCBA main board 4; wherein, a plurality of micro capacitive proximity sensors 41 and field effect transistors (not shown in the figure) are integrated on the upper surface of the PCBA main board 4, and a trigger button 3 corresponding to each micro capacitive proximity sensor 41 is provided above each micro capacitive proximity sensor 41. The trigger button 3 includes a sensing element 34 directly above the micro capacitive proximity sensor 41. When the trigger button 3 is pressed down, the sensing element 34 moves towards the micro capacitive proximity sensor 41. The micro capacitive proximity sensor 41 senses a change in capacitance value and converts it into an identifiable signal and sends it to the PCBA main board 4. The PCBA main board 4 controls the switch operation of the corresponding key according to the received signal. Using the micro capacitive proximity sensor 41 as the trigger element of the key, when the user presses the trigger button 3, the sensing element 34 above the trigger button 3 will approach the micro capacitive proximity sensor 41. After being captured by the sensor, the measured distance change will be converted into a change in capacitance, and then through internal processing of the sensor, the change in capacitance will be converted into a change in high and low level signals. The PCBA main board 4 controls the switch operation of the corresponding key according to the received signal. The above design can achieve triggering with a relatively small pressing distance, and the response speed of the key can be shortened to the microsecond level, which can greatly improve the experience effect of players.

[0020] Among them, the sensing element 34 is an iron sheet or other metal sheet that can be sensed, and is not limited herein.

[0021] Furthermore, the trigger button 3 further includes an upper button cover 32, a lower button cover 36, an elastic element 35, a guiding post 31 and a movable rod 33. A relief hole concentric with the sensing element 34 and the micro capacitive proximity sensor 41 is provided in the center of the lower button cover 36. The designed relief hole can prevent the lower button cover 36 from interfering with the sensing quality of the micro capacitive proximity sensor 41, thereby improving the sensing accuracy of the micro capacitive proximity sensor 41.

[0022] Furthermore, the upper key cap 32 and the lower key cap 36 are covered to form a receiving space. The movable rod 33, the sensing member 34, and the elastic member 35 are all disposed in the receiving space. Four protruding limiting posts 361 are formed at the four corners of the upper end of the lower key cap 36. The elastic members 35 are four and are disposed at the four ends of the bottom of the sensing member 34. The elastic members 35 are correspondingly sleeved outside the limiting posts 361. The sensing member 34 is installed at the bottom of the movable rod 33. A through hole is formed at the center of the top of the upper key cap 32. The lower end of the guiding post 31 passes through the through hole and is sleeved on the upper part of the movable rod 33. Positioning protrusions are formed at both ends of the lower side of the guiding post 31. A key cap 1 is correspondingly clamped at the top of the guiding post 31. When the key cap 1 is pressed down, the guiding post 31 correspondingly presses down the movable rod 33. During the downward movement of the movable rod 33, the sensing member 34 is driven to move downward. At this time, the distance between the sensing member 34 and the micro capacitive proximity sensor 41 changes. When the distance difference reaches the set range, the response operation of the corresponding key is completed. When the finger releases the key cap 1, the sensing member 34 can be driven to reset upward by the resilience of the elastic member 35 to complete the disconnection operation.

[0023] Among them, the elastic member 35 is a plastic spring.

[0024] Furthermore, four heat melting posts 321 extend downward from the four corners of the bottom of the upper key cap 32. Mounting holes 42 corresponding to the heat melting posts 321 are formed on the upper surface of the PCBA main board 4. The heat melting posts 321 of the upper key cap 32 are correspondingly inserted into the mounting holes 42, and then the heat melting posts 321 and the mounting holes 42 are heated. After heating, the heat melting posts 321 are bonded in the mounting holes 42 to realize the fixing operation between the trigger key 3 and the PCBA main board 4.

[0025] Furthermore, the keyboard housing includes an upper keyboard cover 2 and a lower keyboard cover 6. The upper keyboard cover 2 and the lower keyboard cover 6 are covered to form a receiving space. The PCBA main board 4 and the trigger key 3 are both placed in the receiving space. The upper keyboard cover 2 is provided with key holes for the key cap 1 to protrude. A lithium battery 7 electrically connected to the PCBA main board 4 is also provided in the receiving space. Anti-slip pads 5 are bonded to the four corners of the bottom of the lower keyboard cover 6. A charging interface (not shown in the figure) for charging the lithium battery 7 is also provided on the side of the keyboard housing.

[0026] Among them, a Bluetooth chip is also integrated on the PCBA main board 4 for realizing wireless connection with intelligent devices.

[0027] In summary, using a micro capacitive proximity sensor to replace the traditional contact switch can shorten the response speed of the key to the microsecond level, which can greatly improve the experience effect of players.

[0028] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A wireless keyboard that uses a micro capacitive proximity sensor as a key, characterized in that, It includes a keyboard housing and a PCBA main board; multiple micro capacitive proximity sensors are integrated on the upper surface of the PCBA main board, and a corresponding trigger button is provided above each of the micro capacitive proximity sensors. The trigger button includes a sensing member directly above the micro capacitive proximity sensor. When the trigger button is pressed down, the sensing member moves towards the micro capacitive proximity sensor, and the micro capacitive proximity sensor senses a change in capacitance value and converts it into an identifiable signal and sends it to the PCBA main board. The PCBA main board controls the switch operation of the corresponding button according to the received signal.

2. The wireless keyboard using a micro capacitive proximity sensor as a key according to claim 1, characterized in that: The trigger button further includes a button upper cover, a button lower cover, an elastic member, a guide post and a movable rod. A relief hole coaxial with the sensing member and the micro capacitive proximity sensor is formed in the center of the button lower cover.

3. The wireless keyboard using a micro capacitive proximity sensor as a key according to claim 2, characterized in that: The button upper cover and the button lower cover are covered to form a receiving space. The movable rod, the sensing member and the elastic member are all arranged in the receiving space. Four limit posts protrude from the upper ends of the four corners of the button lower cover. There are four elastic members arranged at the four ends of the bottom of the sensing member, and the elastic members are correspondingly sleeved outside the limit posts.

4. The wireless keyboard using a micro capacitive proximity sensor as a key according to claim 2, characterized in that: The sensing member is installed at the bottom of the movable rod. A through hole is formed in the center of the top of the button upper cover. The lower end of the guide post passes through the through hole and is sleeved on the upper part of the movable rod. Positioning protrusions protrude from both ends of the lower side of the guide post, and a keycap is correspondingly clamped at the top of the guide post.

5. The wireless keyboard using a micro capacitive proximity sensor as a key according to claim 2, wherein: Four heat melting posts extend downward from the four corners of the bottom of the button upper cover, and mounting hole positions corresponding to the heat melting posts are formed on the upper surface of the PCBA main board.

6. The wireless keyboard using a micro capacitive proximity sensor as a key according to claim 4, characterized in that: The keyboard housing includes a keyboard upper cover and a keyboard lower cover. The keyboard upper cover and the keyboard lower cover are covered to form a receiving space. The PCBA main board and the trigger buttons are all placed in the receiving space, and the keyboard upper cover is provided with key holes for the keycaps to protrude.

7. The wireless keyboard using a micro capacitive proximity sensor as a key according to claim 6, characterized in that: A lithium battery electrically connected to the PCBA main board is further arranged in the receiving space, and anti-slip pads are adhered to the four corners of the bottom of the keyboard lower cover.

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