CN-122003669-A - Press detection device and electronic device

CN122003669ACN 122003669 ACN122003669 ACN 122003669ACN-122003669-A

Abstract

A pressing detection device and electronic equipment comprise a circuit board, a support and a plurality of sensors, wherein the sensors comprise first electrodes and second electrodes, the first electrodes are arranged on the lower surface of the circuit board, the second electrodes are connected with the lower surface of the circuit board, a first accommodating groove is formed in the lower surface of the circuit board, surrounding the area of the sensors, and is used for accommodating soldering flux remained when the second electrodes are welded on the circuit board, the support is fixed on a shell of the electronic equipment and is abutted against the second electrodes, the second electrodes deform when the pressing detection device receives pressing operation, the distance between the first electrodes and the second electrodes changes to enable the sensors to generate pressing signals, and the circuit board can transmit the pressing signals to a control unit and enable the control unit to perform pressing detection according to the pressing signals. The pressing detection device can perform global pressing detection, the first accommodating groove can accommodate residual soldering flux, and the detection sensitivity is high.

Inventors

HUANG RUILANG
WANG JING
LIU KAI
HUANG XINLI

Assignees

深圳市汇顶科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250606
Priority Date: 20240627

Claims (20)

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 is arranged on the lower surface of the circuit board, the second electrode is connected with the lower surface of the circuit board, a first accommodating groove is formed in the lower surface of the circuit board around the area of the sensor, and the first accommodating groove is used for accommodating soldering flux remained when the second electrode is welded on the circuit board; 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 perform pressing detection according to the pressing signal.
The press detection device according to claim 1, wherein an annular electric connection region is provided on the circuit board, the electric connection region is electrically connected to the second electrode, the first electrode is provided in an inner edge of the electric connection region, and the first accommodation groove is provided around an outer edge of the electric connection region.
The press detection device according to claim 2, wherein the first receiving groove is an arc-shaped groove, and an inner edge of the first receiving groove is in contact with an outer edge of the electrical connection region.
The press detection device according to claim 2, wherein the first accommodation groove includes at least two sub-accommodation grooves, each of the sub-accommodation grooves is an arc-shaped groove, inner edges of the at least two sub-accommodation grooves are each in contact with an outer edge of the electrical connection region, and the at least two sub-accommodation grooves are not communicated with each other.
The press detection device according to any one of claims 2 to 4, wherein a second accommodation groove is provided on a lower surface of the circuit board, the second accommodation groove is provided between the electric connection region and the first electrode, and a first insulating layer is provided between the second accommodation groove and the first electrode, and a thickness of the first insulating layer is greater than or equal to 0.05mm in a direction parallel to the circuit board.
The press detection device according to claim 2, wherein the electric connection area is of an arc-shaped sheet-like structure, and a third accommodation groove is provided on a lower surface of the circuit board in an area between both ends of the electric connection area, the third accommodation groove being in communication with the first accommodation groove.
The press detection device according to claim 2, wherein the electrical connection area includes at least two sub-electrical connection areas, the sub-electrical connection areas are of an arc-shaped sheet structure, the at least two sub-electrical connection areas are annularly distributed, a fourth accommodation groove is provided on a lower surface of the circuit board in a region between adjacent sub-electrical connection areas, and the fourth accommodation groove is communicated with the first accommodation groove.
The press detection device according to claim 2, 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 welded with the electric connecting area, and the sensing part is arranged 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.
The pressing detection device according to claim 8, wherein the deformation portion includes a first sub-deformation portion and a second sub-deformation portion, a first end of the first sub-deformation portion is connected to the connection portion, a second end of the first sub-deformation portion is connected to a first end of the second sub-deformation portion, a second end of the second sub-deformation portion is connected to the sensing portion, and a cross section of the second sub-deformation portion is arc-shaped in a direction perpendicular to the circuit board.
The press detection device according to claim 8, 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 ].
The press detecting device according to claim 8, wherein a difference between an outer radius and an inner radius of the electric connection region is greater than or equal to 1mm, and a difference between an outer radius and an inner radius of the connection portion is in a range of [1mm,1.6mm ] and smaller than a difference between an outer radius and an inner radius of the electric connection region.
The press detection device according to claim 2, 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.
The press detection device according to claim 12, wherein an area of the first electrode is 20 square millimeters or more.
The press detection device according to any one of claims 1 to 4, wherein a groove width of the first accommodation groove is greater than or equal to 0.5mm.
The press detection device according to claim 5, wherein a groove width of the second accommodation groove is greater than or equal to 0.25mm.
The press detection device according to claim 2, wherein a difference between an inner circle radius of the electric connection region and a radius of the first electrode is greater than or equal to 0.3mm.
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.
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 ranges from [10mm,15mm ].
The pressing detection device according to claim 8, wherein the sensing portion is abutted to the bracket through a silicone pad, 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.
The press detection device of claim 19, wherein the silicone pad comprises a first adhesive layer, a second adhesive layer, and a silicone disposed between the first adhesive layer and the second adhesive layer, the silicone pad being bonded to the sensing portion and the bracket through the first adhesive layer and the second adhesive layer, respectively.

Description

Press detection device and electronic device The present application claims priority from application publication number "PCT/CN2024/101908," application publication number "press detection device and electronic device," 27, 2024, 06, and the entire contents of which are incorporated herein by reference. Technical Field The embodiment of the application relates to the technical field of touch panels, 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 an embodiment of the application, a press detection device is provided, and is applied to an electronic device, and the press 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 is arranged on the lower surface of the circuit board, the second electrode is connected with the lower surface of the circuit board, a first accommodating groove is formed in the area, surrounding the sensors, of the lower surface of the circuit board, the first accommodating groove is used for accommodating soldering flux remained when the second electrode is welded on the circuit board, the support is fixed on a shell of the electronic device and is abutted against the second electrode, the second electrode is deformed when the press detection device receives a press operation, the distance between the first electrode and the second electrode is changed, so that the sensors generate a press signal, and the circuit board is used for transmitting the press signal to a control unit and enabling the control unit to perform press detection according to the press 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 pressing detection device provided by the embodiment of the application, the pressing detection device comprises the circuit board, the bracket and the plurality of sensors, when the pressing detection device receives the pressing operation, the relative distance between the first electrode and the second electrode in the sensors is changed, so that the sensors can generate the pressing signal, the circuit board can transmit the pressing signal to the control unit, the recognition of the pressing operation of a user is realized, and as no entity key is arranged, compared with a touch pad in a single key form 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 form in the prior art, the pressing detection device can be used for pressing at any place without pressing at a specific position, the use experience of the user is improved, and as the lower surface of the circuit board is provided with the first accommodating groove around the area of the sensor, after the second electrode is welded to the circuit board, the residual soldering flux can be accommodated through the first accommodating groove, so that the soldering flux is prevented from remaining on the surface of the circuit board to influence the pressing detection sensitivity of the touch pad, and the pressing detection device can be high in sensitivity. 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