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CN-122029521-A - Press detection device and electronic device

CN122029521ACN 122029521 ACN122029521 ACN 122029521ACN-122029521-A

Abstract

The embodiment of the application provides a pressing detection device and electronic equipment, wherein the pressing detection device comprises a circuit board, a support and a plurality of sensors, the sensors comprise a first electrode and a second electrode, the first electrode and the second electrode are respectively connected with the lower surface of the circuit board, a closed cavity is formed between the first electrode and the second electrode, the support is fixed on a shell of the electronic equipment and is abutted against the second electrode, the second electrode deforms when the pressing detection device receives pressing operation, the distance between the first electrode and the second electrode changes to enable the sensors to generate pressing signals, and the circuit board is used for transmitting the pressing signals to a control unit and enabling the control unit to identify the pressing operation according to the pressing signals. The press detection device provided by the embodiment of the application can perform global press detection.

Inventors

  • HUANG RUILANG
  • LIU KAI
  • RAN RUI
  • PI BO

Assignees

  • 深圳市汇顶科技股份有限公司

Dates

Publication Date
20260512
Application Date
20240627

Claims (20)

  1. A press detection device is applied to electronic equipment and is characterized by comprising a circuit board, a bracket and a plurality of sensors; The sensor comprises a first electrode and a second electrode, wherein the first electrode and the second electrode are respectively connected with the lower surface of the circuit board, and a closed cavity is formed between the first electrode and the second electrode; The support is fixed on the shell of the electronic equipment and is abutted against the second electrode; the second electrode is deformed when the pressing detection device receives a pressing operation, and the distance between the first electrode and the second electrode is changed so that the sensor generates a pressing signal; The circuit board is used for transmitting the pressing signal to the control unit and enabling the control unit to identify pressing operation according to the pressing signal.
  2. The press detection device according to claim 1, further comprising a cover plate; The upper surface of the cover plate is provided with a pressing surface, the lower surface of the cover plate is attached to the upper surface of the circuit board, the upper surface of the cover plate is opposite to the lower surface, and the upper surface of the circuit board is opposite to the lower surface; When the cover plate is pressed, the pressing detection device receives a pressing operation.
  3. The press detection device according to claim 1, wherein the second electrode includes an integrally formed sensing portion, a deformation portion, and a connection portion; The induction part is of a disc-shaped structure, the connecting part is of a ring-shaped structure, the radius of the induction part is smaller than the inner radius of the connecting part, the induction part is connected with the connecting part through the deformation part, the induction part and the connecting part are positioned on different planes, and the central connecting line of the induction part and the connecting part is perpendicular to the circuit board; The connecting part is electrically connected with the lower surface of the circuit board, and the sensing part is opposite to the first electrode in the direction perpendicular to the circuit board; The deformation part deforms when the pressing detection device receives a pressing operation, the sensing part moves towards the direction close to the first electrode, and the distance between the first electrode and the sensing part changes to enable the sensor to generate the pressing signal.
  4. A press detection apparatus according to claim 3, wherein a distance between the first electrode and the sensing portion in a direction perpendicular to the circuit board is in a range of [0.1mm,0.3mm ].
  5. The press detecting device according to claim 3, wherein an annular electric connection region is provided on the circuit board, the electric connection region is electrically connected to the connection portion, and a center line of the electric connection region and the connection portion is perpendicular to the circuit board.
  6. The press detecting apparatus according to claim 5, wherein the connection portion is electrically connected to the electrical connection region by a conductive paste, or the connection portion is electrically connected to the electrical connection region by soldering.
  7. The press detecting device according to claim 6, wherein when the connecting portion is electrically connected to the electric connection region by a conductive paste, a difference between an outer radius and an inner radius of the electric connection region is greater than or equal to 1mm, and when the connecting portion is electrically connected to the electric connection region by soldering, a difference between an outer radius and an inner radius of the electric connection region is greater than or equal to 0.5mm.
  8. The press detection device according to claim 5, wherein the first electrode has a disk-like structure, and a center line of the first electrode and the electric connection region is perpendicular to the circuit board.
  9. The press detection device according to claim 8, wherein an area of the first electrode is 20 square millimeters or more.
  10. The press detection device according to claim 8, wherein a difference between an inner radius of the electric connection region and a radius of the first electrode is greater than or equal to 0.5mm.
  11. The press detection device according to claim 8, wherein a radius of the sensing portion is greater than or equal to a radius of the first electrode, the first electrode being located within an edge of a projection of the sensing portion in a direction perpendicular to the circuit board.
  12. The press detection device according to claim 1, wherein the first electrode is integrated into a lower surface of the circuit board or the first electrode is provided on the lower surface of the circuit board.
  13. The press detection device according to claim 1, wherein the plurality of sensors are distributed near an edge of the circuit board, and a distance between the plurality of sensors and the edge of the circuit board is less than or equal to 5mm.
  14. A press detection device according to claim 3, wherein the sensing portion is abutted to the bracket through a silicone pad, a distance between an edge of the sensing portion and an edge of the silicone pad is greater than or equal to 0.5mm, and a projection of the silicone pad on the circuit board is located within an edge of a projection of the sensing portion on the circuit board in a direction perpendicular to the circuit board.
  15. The compression detection apparatus according to claim 14, wherein the thickness of the silicone pad ranges from [0.5mm,1.0mm ], and the shore hardness of the silicone pad is a.
  16. The press detection device according to claim 14, wherein the sensing portion includes a second through hole, an edge of the second through hole being located within an edge of the silicone pad; The second through hole is used for balancing the air pressure of the two sides of the second electrode in the direction perpendicular to the circuit board when the second electrode is electrically connected with the circuit board.
  17. The press detection device according to claim 16, wherein the diameter of the second through hole ranges from [0.6mm,1.0mm ].
  18. The press detection device according to claim 1, wherein a surface of the first electrode is covered with an insulating layer.
  19. The press detection device according to claim 1, wherein the second electrode is made of a metal material, and the thickness of the second electrode ranges from [0.1mm,0.15mm ].
  20. The press detection device according to claim 1, wherein a via hole penetrating the circuit board is provided on the circuit board, the first electrode includes a third through hole, and the third through hole is opposite to the via hole in a direction perpendicular to the circuit board; the first electrode is electrically connected with the control unit through an electrical connection wire accommodated in the via hole; And the third through hole is used for balancing the air pressure of the two sides of the second electrode in the direction vertical to the circuit board when the second electrode is connected with the circuit board.

Description

Press detection device and electronic device Technical Field The embodiment of the application relates to the technical field of electrical engineering, in particular to a pressing detection device and electronic equipment. Background The touch control board is a flat board arranged on the C shell of the notebook computer, the touch control board on the notebook computer can identify a touch control instruction and a pressing instruction, when a finger of a user slides in a touch control area on the touch control board, a cursor in the notebook computer can be moved, and when the finger of the user presses on the touch control board, the touch control board can identify the pressing instruction so that the notebook computer can execute corresponding operation. The conventional touch pad adopts a mechanical pressing structure in a half-domain pressing mode or a single key mode to recognize a pressing instruction. However, the single key shape occupies the area of the touch pad, the area of the touch area is reduced, and the half-domain pressing shape needs to be pressed at a specific position to identify the pressing command, so that the user experience of the conventional touch pad is poor. Disclosure of Invention In view of the above, embodiments of the present application provide a pressing detection device and an electronic apparatus to at least partially solve the above-mentioned problems. According to a first aspect of the embodiment of the application, a pressing detection device is provided, and is applied to electronic equipment, and the pressing detection device comprises a circuit board, a support and a plurality of sensors, wherein the sensors comprise a first electrode and a second electrode, the first electrode and the second electrode are respectively connected with the lower surface of the circuit board, a closed cavity is formed between the first electrode and the second electrode, the support is fixed on a shell of the electronic equipment, the support is abutted against the second electrode, the second electrode deforms when the pressing detection device receives a pressing operation, the distance between the first electrode and the second electrode changes to enable the sensors to generate a pressing signal, and the circuit board is used for transmitting the pressing signal to a control unit and enabling the control unit to identify the pressing operation according to the pressing signal. According to a second aspect of an embodiment of the present application, there is provided an electronic device including a housing and a press detection apparatus according to the first aspect of the embodiment of the present application, wherein a bracket in the press detection apparatus is fixed to the housing. According to the embodiment of the application, the pressing detection device comprises the circuit board, the support and the plurality of sensors, when the pressing detection device receives pressing operation, the relative distance between the first electrode and the second electrode in the sensors is changed, so that the sensors can generate pressing signals, the circuit board can transmit the pressing signals to the control unit to realize the identification of the pressing operation of a user, and as no physical key is arranged, compared with a touch pad in a single key mode in the prior art, the area of a touch area is larger, the pressing position is not limited, the pressing signal can be generated when the pressing detection device receives the pressing operation, therefore, compared with a touch pad in a half-domain pressing mode in the prior art, a user can press at any place, the pressing operation is not needed to be performed at a specific position, the user experience is improved, and as a closed cavity is formed between the first electrode and the second electrode in the sensors, foreign matters or liquid can be prevented from entering between the first electrode and the second electrode, the pressing detection device is enabled to have higher dustproof performance, and thus the pressing detection device can be enabled to be used in various situations and has higher applicability. Drawings In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art. Fig. 1 is a schematic diagram of a touch pad with a single key shape according to an embodiment of the present application; Fig. 2 is a schematic diagram of a press detection device according to an embodiment of the present application; FIG. 3 is a schematic view of a stent according to an embodiment