Pressing detection device and electronic equipment

Abstract

The embodiment of the utility model provides a pressing detection device and electronic equipment. The pressing detection device comprises a circuit board, a bracket and a plurality of sensors, the sensor comprises 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 second electrode is made of a metal material, the support is fixed on a shell of the electronic equipment, and the support abuts against the second electrode; when the pressing detection device receives pressing operation, the second electrode deforms, and the distance between the first electrode and the second electrode is changed, so that the sensor generates a pressing signal; and the circuit board is used for transmitting the pressing signal to the control unit and enabling the control unit to identify the pressing operation according to the pressing signal. The press detection device provided by the embodiment of the utility model can perform global press detection.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electrical engineering technology, and in particular to a pressure detection device and an electronic device. Background Art

[0002] The touchpad is a flat plate set on the C-shell of the laptop computer. The touchpad on the laptop computer can recognize touch commands and press commands. When the user's finger slides on the touch area on the touchpad, the cursor in the laptop computer can be moved. When the user's finger presses on the touchpad, the touchpad can recognize the press command to enable the laptop computer to perform the corresponding operation.

[0003] The existing touch panel uses a mechanical pressing structure in a half-domain pressing form or a single button form to recognize the pressing command.

[0004] However, the single button form will occupy the touch area of ​​the touchpad, reducing the area of ​​the touch area, and the half-domain pressing form requires pressing at a specific position to recognize the pressing command, so the existing touchpad user experience is poor. Utility Model Content

[0005] In view of this, embodiments of the present application provide a pressure detection device and an electronic device to at least partially solve the above problems.

[0006] According to a first aspect of an embodiment of the present application, a press detection device is provided, which is applied to an electronic device, comprising: a circuit board, a bracket and multiple sensors; the sensor comprises a first electrode and a second electrode, the first electrode and the second electrode are respectively connected to the lower surface of the circuit board, and a closed cavity is formed between the first electrode and the second electrode, the second electrode is made of metal, the bracket is fixed to the housing of the electronic device, and the bracket abuts against the second electrode; when the press detection device receives a press operation, the second electrode is deformed, and the distance between the first electrode and the second electrode changes, causing the sensor to generate a press signal; the circuit board is used to transmit the press signal to a control unit, and enable the control unit to identify the press operation according to the press signal.

[0007] According to a second aspect of the embodiments of the present application, an electronic device is provided, comprising a housing and a pressure detection device as described in the first aspect of the embodiments of the present application; a bracket in the pressure detection device is fixed on the housing.

[0008] According to the press detection device provided in the embodiment of the present application, the press detection device includes: a circuit board, a bracket and multiple sensors. When the press detection device receives a press operation, the relative distance between the first electrode and the second electrode in the sensor changes, thereby enabling the sensor to generate a press signal. The circuit board can transmit the press signal to the control unit to realize the recognition of the user's press operation. Since no physical button is set, the area of ​​the touch area is larger than that of the touch pad in the form of a single button in the prior art. Since the press position is not limited, a press signal can be generated when the press detection device receives a press operation. Therefore, compared with the touch pad in the form of a half-domain press in the prior art, the user can press anywhere without pressing at a specific position, thereby improving the user experience. Moreover, since a closed cavity is formed between the first electrode and the second electrode in the sensor, foreign matter or liquid can be prevented from entering between the first electrode and the second electrode, so that the dust and water resistance of the press detection device is higher, thereby enabling the press detection device to be used in a variety of usage scenarios with higher applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0010] Figure 1 is a schematic diagram of a touch panel in the form of a single button provided in an embodiment of the present application;

[0011] Figure 2 is a schematic diagram of a pressure detection device provided in an embodiment of the present application;

[0012] Figure 3 is a schematic diagram of a bracket provided in an embodiment of the present application;

[0013] Figure 4 is a schematic diagram of a second electrode provided in an embodiment of the present application;

[0014] Figure 5 is a schematic diagram of a circuit board provided in an embodiment of the present application;

[0015] Figure 6 is a schematic diagram of a second electrode provided in an embodiment of the present application after being electrically connected to an electrical connection area;

[0016] Figure 7 is a schematic diagram of another pressure detection device provided in an embodiment of the present application;

[0017] Figure 8is an exploded diagram of a pressure detection device provided in an embodiment of the present application;

[0018] Fig. 9 is a schematic diagram of a sensing portion provided in an embodiment of the present application;

[0019] Fig.10 is a schematic diagram of another circuit board provided in an embodiment of the present application;

[0020] Fig.11 It is a cross-sectional view of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and in detail below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0022] As mentioned above, the touchpad is a flat plate arranged on the C shell of the laptop computer. The touchpad on the laptop computer can identify touch commands and press commands. When the user's finger slides on the touch area on the touchpad, the cursor in the laptop computer can be moved. When the user's finger presses on the touchpad, the touchpad can identify the press command to make the laptop computer perform the corresponding operation. The existing touchpad adopts a mechanical press structure in a half-domain press form or a single button form to identify the press command, for example: Figure 1 is a schematic diagram of a touch panel in the form of a single button provided in an embodiment of the present application, such as Figure 1 As shown, the single-button touchpad includes two buttons, and the user inputs the pressing command through the two buttons. Specifically, the left button 102 can simulate the left button of the mouse, and the right button 103 can simulate the right button of the mouse. However, the single-button form will occupy part of the touch area 101 of the touchpad, reducing the area of ​​the touch area 101, and the half-domain pressing form requires pressing at a specific position to recognize the pressing command, for example: the half-domain pressing form requires pressing at the lower left corner to simulate the left button of the mouse, and pressing at the lower right corner to simulate the right button of the mouse, so the existing touchpad user experience is poor.

[0023] A press detection device is provided in an embodiment of the present application, and the press detection device includes: a circuit board, a bracket and multiple sensors. When the press detection device receives a press operation, the relative distance between the first electrode and the second electrode in the sensor changes, thereby enabling the sensor to generate a press signal. The circuit board can transmit the press signal to the control unit to recognize the user's press operation. Since no physical button is set, the touch area is larger than the touch pad in the form of a single button in the prior art. Since the press position is not limited, a press signal can be generated when the press detection device receives a press operation. Therefore, compared with the touch pad in the form of a half-domain press in the prior art, the user can press anywhere without pressing at a specific position, thereby improving the user experience. Moreover, since a closed cavity is formed between the first electrode and the second electrode in the sensor, foreign matter or liquid can be prevented from entering between the first electrode and the second electrode, so that the dust and water resistance of the press detection device is relatively high, thereby enabling the press detection device to be used in a variety of usage scenarios and having a high applicability.

[0024] The following is an explanation of the pressure detection device provided by the present application through an embodiment.

[0025] Figure 2 is a schematic diagram of a pressure detection device provided in an embodiment of the present application, and the pressure detection device is applied to electronic equipment, such as Figure 2 As shown, the press detection device includes: a circuit board 202, a bracket 203 and multiple sensors, the sensor includes a first electrode 2041 and a second electrode 2042, the first electrode 2041 and the second electrode 2042 are respectively connected to the lower surface of the circuit board 202, and a closed cavity is formed between the first electrode 2041 and the second electrode 2042, the second electrode 2042 is made of metal, the bracket 203 is fixed on the housing 301 of the electronic device, and the bracket 203 abuts against the second electrode 2042, when the press detection device receives a press operation, the second electrode 2042 is deformed, the distance between the first electrode 2041 and the second electrode 2042 changes, so that the sensor generates a press signal, the circuit board 202 can transmit the press signal to the control unit, and the control unit identifies the press operation according to the press signal.

[0026] The sensor is arranged between the circuit board 202 and the bracket 203, and the bracket 203 is fixed on the housing 301 of the electronic device. In one example, the bracket 203 can be made of metal, and in another example, the bracket 203 can be made of plastic. The bracket 203 can be fixed on the housing 301 of the electronic device by bolts, clamping, etc. The specific fixing method is not limited here. It should be understood that multiple sensors can be distributed at different positions on the circuit board 202. Optionally, multiple sensors can be evenly distributed on the edge of the circuit board 202.

[0027] The first electrode 2041 and the second electrode 2042 are sealed and connected, that is, a closed cavity is formed between the first electrode 2041 and the second electrode 2042, and the closed cavity is not connected to the external air. In one example, the first electrode 2041 can be covered by the disc-shaped second electrode 2042 to form a closed cavity between the first electrode 2041 and the second electrode 2042, and the closed cavity between the first electrode 2041 and the second electrode 2042 is separated from the external environment.

[0028] When the press detection device receives a press operation, for example, a user presses with a finger, the circuit board 202 moves in the direction of the pressure and generates relative motion with the bracket 203. At this time, since the bracket 203 is fixed on the housing 301 of the electronic device, the circuit board 202 is displaced relative to the bracket 203, the first electrode 2041 is arranged on the circuit board 202, and the second electrode 2042 abuts against the bracket 203. When the circuit board 202 is displaced relative to the bracket 203, the second electrode 2042 is deformed to change the relative distance between the first electrode 2041 and the second electrode 2042, so that the capacitance of the sensor changes, thereby causing the sensor to generate a press signal. After receiving the press signal sent by the sensor, the circuit board 202 transmits the press signal to the control unit. The control unit can identify the press signal and perform a press operation according to the press signal. In an example, the control unit can be a press detection chip arranged on the circuit board 202, a touch chip arranged on the circuit board 202, or a processor of the electronic device, etc.

[0029] In one example, Figure 3 is a schematic diagram of a bracket provided in an embodiment of the present application, such as Figure 3 As shown, the bracket 203 can be connected to the housing 301 of the electronic device through multiple connecting components 2031 extending out of the bracket 203. Specifically, the connecting components 2031 can be fixed to the housing 301 of the electronic device through bolts and bolt holes of multiple connecting components 2031. In another example, the bracket 203 can also be bonded or clamped to the housing 301 of the electronic device. The specific connection method is not limited here.

[0030] In one example, the second electrode 2042 may be made of stainless steel, such as 304 stainless steel, 301 stainless steel, and the like.

[0031] Optionally, when the press detection device receives a press operation, the relative distance between the first electrode 2041 and the second electrode 2042 changes, causing the capacitance of the sensor to change, thereby causing the sensor to generate a press signal. When the relative distance change between the first electrode 2041 and the second electrode 2042 is different, the capacitance change of the sensor is different, and the signal strength of the generated press signal is different (for example: when the press signal is a current signal, the change in current is different, and when the press signal is a voltage signal, the change in voltage is different). When the press intensity of the press operation is large, the relative distance between the first electrode 2041 and the second electrode 2042 changes greatly. Therefore, the change in the relative distance between the first electrode 2041 and the second electrode 2042 can be determined based on the signal strength of the press signal, so that the press intensity of the press operation received by the press detection device can be determined. For example: when the strength of the press signal is large, the press intensity is large, and when the strength of the press signal is small, the press intensity is small. In this way, pressure detection can be performed on the press operation to determine the pressure magnitude of the press operation.

[0032] It should be noted that one of the first electrode 2041 and the second electrode 2042 acts as a driving electrode to receive a driving signal generated by a control unit on the circuit board 202. The control unit can be a touch chip, a press detection chip, etc. The other of the first electrode 2041 and the second electrode 2042 acts as a receiving electrode to output a press signal to the control unit on the circuit board, thereby realizing press detection.

[0033] In an embodiment of the present application, a press detection device includes: a circuit board 202, a bracket 203 and a plurality of sensors. When the press detection device receives a press operation, the relative distance between the first electrode 2041 and the second electrode 2042 in the sensor changes, thereby enabling the sensor to generate a press signal. The circuit board 202 can transmit the press signal to the control unit to recognize the user's press operation. Since no physical button is provided, the touch area is larger than that of a touch pad in the form of a single button in the prior art. Since the press position is not limited, a press signal can be generated when the press detection device receives a press operation. Therefore, compared with a touch pad in the form of a half-domain press in the prior art, a user can press anywhere without having to press at a specific position, thereby improving the user experience. Furthermore, since a closed cavity is formed between the first electrode 2041 and the second electrode 2042 in the sensor, foreign matter or liquid can be prevented from entering between the first electrode 2041 and the second electrode 2042, thereby enabling the press detection device to have higher dust and water resistance performance. Thus, the press detection device can be used in a variety of usage scenarios with higher applicability.

[0034] In one possible implementation, Figure 2As shown, the press detection device also includes a cover plate 201, the upper surface of the cover plate 201 provides a pressing surface, the lower surface of the cover plate 201 is in contact with the upper surface of the circuit board 202, the upper surface of the cover plate 201 is opposite to the lower surface, and the upper surface of the circuit board 202 is opposite to the lower surface. When the cover plate 201 is pressed, the press detection device receives the pressing operation.

[0035] The upper surface of the cover 201 provides a pressing surface. In one example, the cover 201 can be a cover 201 made of glass. The circuit board 202 is arranged between the sensor and the cover 201. When the cover 201 is pressed, for example, the user presses the cover 201, the press detection device receives the press operation, and the cover 201 drives the circuit board 202 to move in the pressure direction and produce relative movement with the bracket 203. At this time, since the bracket 203 is fixed on the housing 301 of the electronic device, the circuit board 202 is displaced relative to the bracket 203, and since the first electrode 2041 is arranged on the circuit board 202, the second electrode 2042 is in contact with the bracket 203. When the circuit board 202 is displaced relative to the bracket 203, the second electrode 2042 is deformed to change the relative distance between the first electrode 2041 and the second electrode 2042, so that the capacitance of the sensor changes, so that the sensor generates a press signal, thereby identifying the user's press operation. In one example, such as Figure 2 As shown, the cover plate 201 may be bonded to the circuit board 202 via the first adhesive layer 401 .

[0036] Optionally, the circuit board 202 can be a circuit board 202 with a touch recognition function. In this case, the cover 201 can also provide a touch surface. When a finger slides on the cover 201, the circuit board 202 performs touch recognition on the finger sliding trajectory and generates a touch recognition signal. The circuit board 202 can transmit the touch recognition signal to the touch recognition chip on the circuit board 202 or the processing unit of the electronic device, so that the electronic device performs related operations corresponding to the finger sliding, such as: moving the cursor, moving the page, zooming the page, etc., which will not be repeated here.

[0037] In an embodiment of the present application, the press detection device also includes a cover plate 201, thereby providing a pressing surface to the user. When the user presses the cover plate 201, the press detection device can receive the pressing operation, so that the user's pressing operation can be identified by the press detection device. Since the pressing position is not limited, a press signal can be generated when the cover plate 201 is pressed. Therefore, compared with the press detection scheme in the prior art, the user can press anywhere on the cover plate 201 without pressing at a specific position, thereby improving the user experience.

[0038] Figure 4 is a schematic diagram of a second electrode provided in an embodiment of the present application, such as Figure 4As shown, the second electrode 2042 includes an integrally formed sensing portion 20423, a deformation portion 20422 and a connecting portion 20421, the sensing portion 20423 is a disc-shaped structure, the connecting portion 20421 is a ring-shaped structure, the radius of the sensing portion 20423 is smaller than the inner radius of the connecting portion 20421, the sensing portion 20423 and the connecting portion 20421 are connected through the deformation portion 20422, the sensing portion 20423 and the connecting portion 20421 are in different planes, and the sensing portion 20423 and the connecting portion The center line of 20421 is perpendicular to the circuit board 202, the connecting portion 20421 is electrically connected to the lower surface of the circuit board 202, and in a direction perpendicular to the circuit board 202, the sensing portion 20423 is arranged opposite to the first electrode 2041. When the press detection device receives a press operation, the deformation portion 20422 is deformed, and the sensing portion 20423 moves toward the direction close to the first electrode 2041. The change in the distance between the first electrode 2041 and the sensing portion 20423 causes the sensor to generate a press signal.

[0039] The sensing portion 20423 is connected to the connecting portion 20421 through the deformable portion 20422. The sensing portion 20423 is a disc-shaped structure, and the connecting portion 20421 is a ring-shaped structure. It should be understood that since there is a gap between the circuit board 202 and the bracket 203, the connecting portion 20421 and the sensing portion 20423 are not in the same plane, so the connecting portion 20421 can be electrically connected to the circuit board 202, and the sensing portion 20423 is in contact with the bracket 203. Since the radius of the sensing portion 20423 is smaller than the inner radius of the connecting portion 20421, Figure 2 The deformation part 20422 shown can be a hollow truncated cone structure, the edge of the large circular surface of the deformation part 20422 of the truncated cone structure is connected to the inner circle of the connecting part 20421, and the edge of the small circular surface of the deformation part 20422 of the truncated cone structure is connected to the edge of the sensing part 20423. Thus, the sensing part 20423, the deformation part 20422 and the connecting part 20421 are combined to form a disc-shaped second electrode 2042.

[0040] The center line of the sensing portion 20423 and the connecting portion 20421 is perpendicular to the circuit board 202, that is, the centers of the sensing portion 20423 and the connecting portion 20421 are located on a straight line in a direction perpendicular to the circuit board 202, that is, in a direction perpendicular to the circuit board 202, the projections of the sensing portion 20423 and the connecting portion 20421 on the circuit board 202 are concentric.

[0041] When the press detection device receives a press operation, for example, when the upper surface of the cover 201 is pressed, the cover 201 drives the circuit board 202 and the bracket 203 to produce relative movement, so that the relative distance between the circuit board 202 and the bracket 203 is reduced. At this time, due to the abutment between the sensing part 20423 and the bracket 203, the circuit board 202 drives the connecting part 20421 to move downward to deform the deformation part 20422, and reduce the relative distance between the first electrode 2041 and the sensing part 20423, and the sensor generates a press signal. When the upper surface of the cover 201 stops being pressed, the deformation part 20422 rebounds and the circuit board 202 and the bracket 203 produce relative movement, the relative distance between the circuit board 202 and the bracket 203 increases, and the relative distance between the first electrode 2041 and the sensing part 20423 increases until the relative distance between the first electrode 2041 and the sensing part 20423 returns to the initial state, and the sensor stops generating a press signal.

[0042] In one example, the second electrode 2042 can be integrally formed by stamping a metal sheet. For example, the second electrode 2042 can be formed by stamping a steel sheet. The material of the second electrode 2042 can be a metal or a metal alloy such as stainless steel 304 or stainless steel 301.

[0043] In the embodiment of the present application, the second electrode 2042 includes a deformation portion 20422, a connecting portion 20421 and a sensing portion 20423. The connecting portion 20421 is electrically connected to the circuit board 202. The deformation portion 20422 connects the sensing portion 20423 and the connecting portion 20421. The sensing portion 20423 abuts against the bracket 203. When the press detection device receives a press operation, the deformation portion 20422 is deformed, and the relative distance between the first electrode 2041 and the sensing portion 20423 changes, thereby generating a press signal, thereby realizing the detection of the press. Since the deformation portion 20422 is provided, the deformation portion 20422 can be deformed when the press detection device receives a press operation, so that the sensor generates a press signal, and can rebound when the press stops, so that the first electrode 2041 and the sensing portion 20423 return to the initial state, so that the sensor stops generating a press signal, thereby realizing the detection of the press.

[0044] In a possible implementation, in a direction perpendicular to the circuit board 202 , the distance between the first electrode 2041 and the sensing portion 20423 is in the range of [0.1 mm, 0.3 mm].

[0045] In the embodiment of the present application, the distance range between the first electrode 2041 and the sensing portion 20423 is [0.1mm, 0.3mm]. Therefore, when the relative distance between the first electrode 2041 and the sensing portion 20423 changes, the signal amount of the generated press signal is larger, thereby preventing the control unit from being unable to identify the press operation due to the small signal amount of the press signal caused by the close relative distance between the first electrode 2041 and the sensing portion 20423, thereby improving the sensitivity of the press detection device for press detection.

[0046] Figure 5 is a schematic diagram of a circuit board provided in an embodiment of the present application, such as Figure 5 As shown, a circular electrical connection area 205 is provided on the circuit board 202 , the electrical connection area 205 is electrically connected to the connection portion 20421 , and a center line connecting the electrical connection area 205 and the connection portion 20421 is perpendicular to the circuit board 202 .

[0047] The electrical connection area 205 on the circuit board 202 can be a circular electrical connection area 205. It should be understood that the electrical connection area 205 is electrically connected to the connection portion 20421. Since the connection portion 20421 is in the shape of a circular ring, the contact area of ​​the circular electrical connection area 205 is larger than the contact area of ​​other shapes of electrical connection areas 205. For example, compared with the point-shaped electrical connection area 205 and the rectangular electrical connection area with the same area as the circular electrical connection area 205, the contact area between the circular electrical connection area 205 and the connection portion 20421 is larger than the contact area between the circular electrical connection area 205 and the connection portion 20421. It should also be understood that since a closed cavity is formed between the first electrode 2041 and the second electrode 2042, the circular electrical connection area 205 on the circuit board 202 has the same shape as the connecting portion 20421, so the closed cavity can be better sealed. For example, if a point-shaped electrical connection area 205 is used, the connecting portion 20421 is electrically connected through multiple points, and the sealing is poor. The area of ​​the electrical connection using the circular electrical connection area 205 is larger, so the sensor can generate a pressing signal with a larger signal amount.

[0048] The center line between the annular electrical connection area 205 and the connecting portion 20421 is perpendicular to the circuit board 202. In one example, after the connecting portion 20421 is electrically connected to the electrical connection area 205 on the circuit board 202, the electrical connection area 205 is located inside the connecting portion 20421, that is, the inner circle and the outer circle of the electrical connection area 205 are both located between the inner circle and the outer circle of the connecting portion 20421.

[0049] Figure 6 is a schematic diagram of a second electrode and an electrical connection area electrically connected to each other provided in an embodiment of the present application, such as Figure 6As shown, the electrical connection area 205 is electrically connected to the connection portion 20421 of the second electrode 2042 , the connection portion 20421 is connected to the sensing portion 20423 through the deformation portion 20422 , and the sensing portion 20423 is arranged opposite to the first electrode 2041 .

[0050] In the embodiment of the present application, a circular electrical connection area 205 is provided on the circuit board 202, so that the connecting portion 20421 on the second electrode 2042 can be electrically connected to the circular electrical connection area 205, which can improve the sealing of the closed cavity between the first electrode 2041 and the second electrode 2042, and prevent foreign matter or liquid from entering the closed cavity between the first electrode 2041 and the second electrode 2042 through the gap between the connecting portion 20421 and the electrical connection area 205. The circular electrical connection area 205 and the circular connection portion 20421 have the same shape. Compared with the electrical connection area 205 of the same area, the electrical connection area 205 with the same shape as the connecting portion 20421 can ensure that the contact area between the electrical connection area 205 and the connecting portion 20421 is larger, thereby improving the electrical connection effect.

[0051] In a possible implementation, the connection portion 20421 is electrically connected to the electrical connection area 205 through a conductive adhesive, or the connection portion 20421 is electrically connected to the electrical connection area 205 through soldering.

[0052] In the embodiment of the present application, the connecting portion 20421 is electrically connected to the electrical connection area 205 by conductive glue, or the connecting portion 20421 is electrically connected to the electrical connection area 205 by soldering, thereby realizing the electrical connection between the second electrode 2042 and the electrical connection area 205. Therefore, when the relative distance between the first electrode 2041 and the sensing portion 20423 changes, the distance between the energized sensing portion 20423 and the energized first electrode 2041 changes, causing the capacitance of the sensor to change to generate a press signal, thereby realizing the generation of a press signal.

[0053] In one possible implementation, when the connecting portion 20421 is electrically connected to the electrical connection area 205 through conductive glue, the difference between the outer circle radius and the inner circle radius of the electrical connection area 205 is greater than or equal to 1 mm; when the connecting portion 20421 is electrically connected to the electrical connection area 205 through soldering, the difference between the outer circle radius and the inner circle radius of the electrical connection area 205 is greater than or equal to 0.5 mm.

[0054] Since the reliability of soldering electrical connection is higher, the width of the electrical connection area 205 can be narrower, and the circular width of the electrical connection area 205 can be greater than or equal to 0.5 mm, that is, the difference between the outer circle radius and the inner circle radius is greater than or equal to 0.5 mm. It should be understood that the circular electrical connection area 205 is a standard circular shape, that is, the inner circle and the outer circle have the same center.

[0055] Since the reliability of the electrical connection of the conductive adhesive is lower than the reliability of the electrical connection of the solder, specifically, under the action of external force, the force required for the conductive adhesive to break away from the electrical connection is much smaller than the force required for the soldered electrical connection to break away from the electrical connection. Therefore, compared with the soldered electrical connection, the conductive adhesive requires a wider electrical connection area 205 to improve reliability. Therefore, the annular width of the electrical connection area 205 can be greater than or equal to 1 mm, that is, when the connecting portion 20421 is electrically connected to the electrical connection area 205 through the conductive adhesive, the difference between the outer circle radius and the inner circle radius of the electrical connection area 205 is greater than or equal to 1 mm.

[0056] In the embodiment of the present application, when the connecting portion 20421 is electrically connected to the electrical connection area 205 through the conductive adhesive, the difference between the outer circle radius and the inner circle radius of the electrical connection area 205 is greater than or equal to 1 mm. When the connecting portion 20421 is electrically connected to the electrical connection area 205 through soldering, the difference between the outer circle radius and the inner circle radius of the electrical connection area 205 is greater than or equal to 0.5 mm, thereby ensuring the reliability of the electrical connection between the connecting portion 20421 and the electrical connection area 205, preventing the connecting portion 20421 from being disconnected from the electrical connection area 205 due to external force, and improving the reliability of the press detection device.

[0057] In a possible implementation, the first electrode 2041 is a disc-shaped structure, and a center line connecting the first electrode 2041 and the electrical connection area 205 is perpendicular to the circuit board 202 .

[0058] In some other examples, the first electrode 2041 can be rectangular, triangular, etc. It should be understood that since the electrical connection area 205 is annular and the first electrode 2041 is to be arranged within the inner circle of the electrical connection area 205, the area of ​​the disc-shaped first electrode 2041 is larger than the area of ​​the first electrode 2041 of other shapes.

[0059] In the embodiment of the present application, the first electrode 2041 is a disc-shaped structure, and the center line connecting the first electrode 2041 and the electrical connection area 205 is perpendicular to the circuit board 202. Compared with the first electrodes 2041 of other shapes, the disc-shaped first electrode 2041 has a larger area. Therefore, compared with electrodes of other shapes, when performing press detection, the disc-shaped first electrode 2041 can make the sensor generate a larger signal amount of the press signal, thereby improving the sensitivity of press detection.

[0060] In a possible implementation, the area of ​​the first electrode 2041 is greater than or equal to 20 square millimeters.

[0061] In the embodiment of the present application, the area of ​​the first electrode 2041 is greater than or equal to 20 square millimeters, which can generate a larger signal amount than the first electrode 2041 with a smaller area, thereby improving the sensitivity of the press detection.

[0062] In a possible implementation, the difference between the inner radius of the electrical connection region 205 and the radius of the first electrode 2041 is greater than or equal to 0.5 mm.

[0063] The electrical connection area 205 is a circular electrical connection area 205, and the center line connecting the electrical connection area 205 and the first electrode 2041 is perpendicular to the circuit board 202. Therefore, the outer circle, the inner circle and the first electrode 2041 of the electrical connection area 205 are cocentric. When the difference between the radius of the inner circle of the electrical connection area 205 and the radius of the first electrode 2041 is greater than or equal to 0.5 mm, that is, the distance between the inner circle of the electrical connection area 205 and the edge of the first electrode 2041 is greater than or equal to 0.5 mm, the deformation portion 20422 can prevent the first electrode 2041 from contacting the second electrode 2042 after deformation, and can prevent the electrical connection area 205 from being electrically connected to the first electrode 2041 when it is electrically connected to the connection portion 20421, for example: when soldering is electrically connected, excess solder electrically connects the first electrode 2041 and the electrical connection area 205.

[0064] In the embodiment of the present application, the difference between the inner circle radius of the electrical connection area 205 and the radius of the first electrode 2041 is greater than or equal to 0.5 mm, thereby preventing the deformation portion 20422 from contacting the first electrode 2041 and the second electrode 2042 after deformation, and preventing the electrical connection area 205 from being electrically connected to the first electrode 2041 when the connection portion 20421 is electrically connected, thereby ensuring the normal operation of the sensor.

[0065] In a possible implementation, the radius of the sensing portion 20423 is greater than or equal to the radius of the first electrode 2041 , and the first electrode 2041 is located within the edge of the projection of the sensing portion 20423 in a direction perpendicular to the circuit board 202 .

[0066] The radius of the sensing portion 20423 is greater than or equal to the radius of the first electrode 2041, that is, the area of ​​the sensing portion 20423 is greater than or equal to the area of ​​the first electrode 2041, and in the direction perpendicular to the circuit board 202, the projection of the first electrode 2041 on the circuit board 202 is located within the projection of the sensing portion 20423 on the circuit board 202, that is, in the direction perpendicular to the circuit board 202, the first electrode 2041 is covered by the second electrode 2042.

[0067] Optionally, a center line connecting the first electrode 2041 and the sensing portion 20423 is perpendicular to the circuit board 202 , and the first electrode 2041 and the sensing portion 20423 have the same area.

[0068] In the embodiment of the present application, the radius of the sensing portion 20423 is greater than or equal to the radius of the first electrode 2041, and the first electrode 2041 is located within the edge of the projection of the sensing portion 20423 in a direction perpendicular to the circuit board 202, thereby allowing the entire area of ​​the first electrode 2041 to participate in press detection, thereby generating a press signal with a larger signal amount, and improving the sensitivity of press detection.

[0069] In a possible implementation manner, the first electrode 2041 is integrated into the lower surface of the circuit board 202 , or the first electrode 2041 is disposed on the lower surface of the circuit board 202 .

[0070] Figure 7 is a schematic diagram of another pressure detection device provided in an embodiment of the present application, such as Figure 7 As shown, the first electrode 2041 can be bonded or welded on the lower surface of the circuit board 202, and the first electrode 2041 and the second electrode 2042 are both electrically connected to the circuit board 202. In another implementation, as shown in FIG. Figure 2 As shown, the first electrode 2041 may be integrated into the lower surface of the circuit board 202 .

[0071] It should be noted that if Figure 2 In the solution shown in FIG. 1 , the first electrode 2041 is integrated in the lower surface of the circuit board 202. The first electrode can be a metal layer in the circuit board. For example, the first electrode 2041 is formed by copper deposition or other processes at the position where the first electrode 2041 is required to be set on the circuit board 202. Figure 7 In the scheme shown in the figure, the first electrode 2041 is arranged on the lower surface of the circuit board 202, and the first electrode 2041 can be bonded or welded to the first electrical connection area corresponding to the first electrode 2041 on the circuit board 202, for example, by bonding with a conductive adhesive or by soldering. In one example, the area of ​​the first electrical connection area corresponding to the first electrode 2041 is less than or equal to the first electrode 2041, and after the first electrode 2041 is electrically connected to the first electrical connection area, the edge of the first electrical connection area is located within the edge of the first electrode 2041, so that the first electrode 2041 can electrically connect the first electrode 2041 to the first electrical connection area. The connection area covers, and it should also be noted that the first electrical connection area corresponding to the first electrode 2041 can be located outside the inner circle edge of the annular electrical connection area 205 corresponding to the second electrode 2042. Taking the circular first electrical connection area as an example, the circular first electrical connection area can be co-centric with the electrical connection area 205, and the radius is smaller than the inner circle radius of the electrical connection area 205, so that the first electrical connection area is arranged outside the inner circle edge of the electrical connection area 205. It should be understood that the first electrical connection area is not connected to the electrical connection area 205, thereby preventing the first electrode 2041 from being electrically connected to the second electrode 2042.

[0072] In an embodiment of the present application, the first electrode 2041 is integrated on the lower surface of the circuit board 202, or the first electrode 2041 is bonded to the lower surface of the circuit board 202. When the first electrode 2041 is integrated on the lower surface of the circuit board 202, the overall thickness of the sensor can be reduced, thereby reducing the thickness of the press detection device. When the first electrode 2041 is bonded to the lower surface of the circuit board 202, when the first electrode 2041 is damaged, the first electrode 2041 can be easily replaced without the need for special treatment of the circuit board 202, and the cost is low.

[0073] In a possible implementation, the multiple sensors are distributed close to the edge of the circuit board 202 , and the distances between the multiple sensors and the edge of the circuit board 202 are all less than or equal to 5 mm.

[0074] like Figure 6 As shown, multiple sensors can be distributed on the edge of the circuit board 202. It should be understood that Figure 6 As just an example, the number of sensors can be set as needed. Optionally, at least four sensors can be set and distributed at the four corners of the circuit board 202. When the number of sensors is greater than 4, they can be evenly distributed around the circuit board 202.

[0075] It should be understood that when the press detection device receives a press operation, for example, when the cover 201 is pressed, the edge of the circuit board 202 is displaced more relative to the center of the circuit board 202. Therefore, the press sensors are distributed at the edge of the circuit board 202, and the distance between the sensor and the edge of the circuit board 202 is less than or equal to 5 mm, thereby making the press detection more sensitive.

[0076] In the embodiment of the present application, multiple sensors are distributed near the edge of the circuit board 202, and the distance between the multiple sensors and the edge of the circuit board 202 is less than or equal to 5 mm. This can improve the sensitivity of the press detection device for press detection, and when the user presses, a press signal can be detected by pressing with a smaller force, thereby improving the user experience.

[0077] In one possible implementation, the sensing portion 20423 abuts against the bracket 203 through the silicone pad 402, and the distance between the edge of the sensing portion 20423 and the edge of the silicone pad 402 is greater than or equal to 0.25 mm. In a direction perpendicular to the circuit board 202, the projection of the silicone pad 402 on the circuit board 202 is located within the edge of the projection of the sensing portion 20423 on the circuit board 202.

[0078] like Figure 2 and Figure 7As shown, the sensing part 20423 is abutted against the bracket 203 through the silicone pad 402. In one example, both ends of the silicone pad 402 can be coated with glue, such as double-sided tape, one side of the silicone pad 402 is bonded to the sensing part 20423, and the other side of the silicone pad 402 is bonded to the bracket 203. The distance between the edge of the surface of the silicone pad 402 in contact with the sensing part 20423 and the edge of the sensing part 20423 is greater than or equal to 5 mm. In one example, the silicone pad 402 can be a cylindrical silicone pad 402, the upper surface of the silicone pad 402 is in contact with the sensing part 20423, the center line of the upper surface of the silicone pad 402 and the sensing part 20423 is perpendicular to the circuit board 202, and the difference between the radius of the sensing part 20423 and the radius of the upper surface of the silicone pad 402 is greater than or equal to 0.25 mm.

[0079] Figure 8 is an exploded diagram of a pressure detection device provided in an embodiment of the present application, such as Figure 8 As shown, the lower surface of the cover plate 201 is bonded to the upper surface of the circuit board 202 through the first adhesive layer 401, the upper surface of the cover plate 201 is opposite to the lower surface, the sensor includes a first electrode 2041 and a second electrode 2042, the first electrode 2041 and the second electrode 2042 are respectively connected to the lower surface of the circuit board 202, and a closed cavity is formed between the first electrode 2041 and the second electrode 2042, and the sensing part 20423 in the second electrode 2042 is abutted against the bracket 203 through the silicone pad 402. It should be understood that Figure 8 2 shows a solution of electrically connecting the second electrode 2042 to the circuit board 202 through the conductive adhesive 206. Optionally, the second electrode 2042 can also be electrically connected to the circuit board 202 through soldering.

[0080] In the embodiment of the present application, the sensing part 20423 is abutted against the bracket 203 through the silicone pad 402, so that when the press detection device receives a press operation, the relative distance between the circuit board 202 and the bracket 203 changes, and the silicone pad 402 presses against the sensing part 20423, causing the deformation part 20422 to deform, and the relative distance between the sensing part 20423 of the first electrode 2041 and the second electrode 2042 changes, thereby realizing the generation of a press signal, and because the distance between the edge of the sensing part 20423 and the edge of the silicone pad 402 is greater than or equal to 0.25 mm, the force can be concentrated on the sensing part 20423, so that the deformation part 20422 in the second electrode 2042 can be successfully deformed, thereby ensuring that the press detection device can perform press detection normally.

[0081] In a possible implementation, the thickness range of the silicone pad 402 is [0.5 mm, 1.0 mm], and the Shore hardness of the silicone pad 402 is A.

[0082] In the embodiment of the present application, the thickness range of the silicone pad 402 is [0.5mm, 1.0mm], thereby ensuring that the deformation portion 20422 of the second electrode 2042 can be deformed while reducing the overall thickness of the press detection device, and the Shore hardness of the silicone pad 402 is A, which can ensure that when the distance between the circuit board 202 and the bracket 203 changes, the silicone pad 402 can press against the sensing portion 20423 to cause the deformation portion 20422 of the second electrode 2042 to deform, so that the sensor generates a press signal, thereby ensuring that the press detection device can perform press detection normally.

[0083] Fig. 9 is a schematic diagram of a sensing unit provided in an embodiment of the present application, such as Fig. 9 As shown, the sensing portion 20423 of the second electrode 2042 includes a second through hole 20424, the edge of which is located within the edge of the silicone pad 402. The second through hole 20424 can balance the air pressure on both sides of the second electrode 2042 in a direction perpendicular to the circuit board when the second electrode 2042 is electrically connected to the circuit board 202.

[0084] When the second electrode 2042 is electrically connected to the electrical connection area 205 on the circuit board 202, excess air between the second electrode 2042 and the circuit board 202 can be discharged through the second through hole 20424, so that the air pressure on both sides of the second electrode 2042 in a direction perpendicular to the circuit board 202 is balanced. After the second electrode 2042 is electrically connected to the circuit board 202, it abuts against the bracket 203 through the silicone pad 402. When abutting, the silicone pad 402 covers the second through hole 20424, that is, the edge of the second through hole 20424 is located within the edge of the surface where the silicone pad 402 abuts against the second electrode 2042. The silicone pad 402 blocks the side of the second through hole 20424 close to the silicone pad 402, so that a closed cavity is formed between the second electrode 2042 and the first electrode 2041.

[0085] In the embodiment of the present application, the sensing portion 20423 of the second electrode 2042 includes a second through hole 20424, and the edge of the second through hole 20424 is located within the edge of the silicone pad 402. Therefore, when the second electrode 2042 is assembled on the circuit board 202, the air pressure on both sides of the second electrode 2042 in a direction perpendicular to the circuit board 202 can be balanced through the second through hole 20424, thereby preventing the electrical connection between the second electrode 2042 and the circuit board 202 from being affected by air and causing a gap. When the sensing portion 20423 of the second electrode 2042 abuts against the bracket 203 through the silicone pad 402, the silicone pad 402 blocks the second through hole 20424, thereby forming a closed cavity between the second electrode 2042 and the first electrode 2041, thereby preventing foreign matter or liquid from entering between the first electrode 2041 and the second electrode 2042, thereby improving the dust and water resistance of the press detection device, thereby enabling the press detection device to be used in a variety of usage scenarios with high applicability.

[0086] In a possible implementation, the diameter range of the second through hole 20424 is [0.6 mm, 1.0 mm].

[0087] In the embodiment of the present application, the diameter range of the second through hole 20424 is [0.6mm, 1.0mm], so that when the second electrode 2042 and the circuit board 202 are electrically connected, the air pressure on both sides of the second electrode 2042 in a direction perpendicular to the circuit board 202 can be balanced through the second through hole 20424, and the second through hole 20424 can be blocked by the silicone pad 402. Since the diameter of the second through hole 20424 is small, the reliability of the second electrode 2042 is higher than that of a larger second through hole 20424, thereby improving the reliability of the press detection device.

[0088] In a possible implementation manner, the surface of the first electrode 2041 is covered with an insulating layer.

[0089] In one example, the insulating layer covering the surface of the first electrode 2041 is insulating ink. Specifically, after the insulating ink is coated on the surface of the circuit board 202, holes are only opened on the electrical connection area 205 without opening holes at the corresponding position of the first electrode 2041, so that the surface of the first electrode 2041 is covered with insulating ink. In some other examples, the insulating layer can be an insulating layer of other materials, and the specific type of the insulating layer is not limited here.

[0090] In the embodiment of the present application, the surface of the first electrode 2041 is covered with an insulating layer, thereby preventing the first electrode 2041 from contacting the second electrode 2042 when the relative distance between the sensing portion 20423 of the second electrode 2042 and the first electrode 2041 changes, so that the sensor can generate a press signal normally, thereby improving the reliability of the press detection device.

[0091] In a possible implementation, the second electrode 2042 is made of metal, and the thickness of the second electrode 2042 is in the range of [0.1 mm, 0.15 mm].

[0092] In the embodiment of the present application, the second electrode 2042 is made of metal, so that after the second electrode 2042 is electrically connected to the circuit board 202, the second electrode 2042 can be energized. When the relative distance between the energized second electrode 2042 and the energized first electrode 2041 changes, the capacitance of the sensor changes to generate a press signal, and the thickness range of the second electrode 2042 is [0.1mm, 0.15mm]. Therefore, while ensuring that the press detection device is overall light and thin, the strength of the second electrode 2042 can be improved, and the connection part 20421 of the second electrode 2042 can be prevented from breaking due to deformation, thereby improving the reliability of the press detection device.

[0093] Fig.10 is a schematic diagram of another circuit board provided in an embodiment of the present application, such as Fig.10 As shown, the circuit board 202 is provided with a first through hole 2021 penetrating the circuit board 202, the first electrode 2041 includes a third through hole 20411, in the direction perpendicular to the circuit board 202, the third through hole 20411 is opposite to the first through hole 2021, the first electrode 202 is electrically connected to the control unit 207 through the electrical connection line accommodated in the first through hole 2021, and the third through hole 20411 can balance the air pressure on both sides of the second electrode 2042 in the direction perpendicular to the circuit board 202 when the second electrode 2042 is connected to the circuit board 202.

[0094] like Fig.10 As shown, the electrical connection area 205 on the circuit board 202 can accommodate the electrical connection wires and the electrical connection wires of the control unit 207 through the second via 2022. After the second electrode 2042 is electrically connected to the electrical connection area 205, it can be electrically connected to the control unit 207 through the electrical connection wires accommodated in the second via 2022.

[0095] In the embodiment of the present application, the circuit board 202 is provided with a first via hole 2021, so that the first electrode 2041 can be electrically connected to the control unit 207 through the first via hole 2021, thereby realizing the electrical connection of the first electrode 2041, and because the first electrode 2041 is provided with a third through hole 20411, the first through hole 2021 is opposite to the third through hole 204111, and the first through hole 2021 passes through the circuit board 202, when the second electrode 2042 is electrically connected to the electrical connection area 205 on the circuit board 202, the air pressure on both sides of the second electrode 2042 can be balanced. Compared with the solution of providing the second through hole 20424 on the sensing portion 20423 of the second electrode 2042 in the aforementioned embodiment, since the through hole is provided on the first electrode 2041, the air pressure on both sides of the second electrode 2042 can be balanced. No through hole is set on the second electrode 2042, so the strength of the second electrode 2042 is higher, and because the lower surface of the cover plate 201 is in contact with the upper surface of the circuit board 202, the first electrode 2041 is set on the circuit board 202, and the second electrode 2042 is abutted against the bracket 203 through the silicone pad 402, and the possibility of relative movement between the silicone pad 402 and the second electrode 2042 is much greater than the possibility of relative movement between the cover plate 201 and the circuit board 202. Therefore, compared with setting the second through hole 20424 on the second electrode 2042, setting the third through hole 20411 on the first electrode 2041 has a higher sealing property of the closed cavity formed between the first electrode 2041 and the second electrode 2042, thereby improving the sealing property of the press detection device.

[0096] In a possible implementation, the diameter range of the third through hole 20411 is [0.15 mm, 0.3 mm].

[0097] In the embodiment of the present application, the diameter range of the third through hole 20411 is [0.15mm, 0.3mm], thereby ensuring that the area of ​​the first electrode 2041 is larger and preventing the signal strength of the pressing signal from being weak due to the smaller area of ​​the first electrode 2041 caused by the setting of a larger third through hole 20411.

[0098] In a possible implementation, the thickness of the bracket 203 is greater than or equal to 0.5 mm.

[0099] The bracket 203 can be made of a variety of materials, including but not limited to plastic, stainless steel, magnesium alloy, aluminum alloy, titanium alloy, etc. To ensure the strength of the bracket 203, the thickness of the bracket 203 is greater than or equal to 0.5 mm.

[0100] In an embodiment of the present application, the thickness of the bracket 203 is greater than or equal to 0.5 mm, thereby ensuring the strength of the bracket 203, so that the bracket 203 can be fixed on the housing 301 of the electronic device, thereby improving the reliability of the press detection device, and when the press detection device receives a press operation, for example: when the cover 201 is pressed, the bracket 203 with higher strength is less likely to change position than the bracket 203 with lower strength. When the press detection device receives a press operation, it can be ensured that the distance between the circuit board 202 and the bracket 203 changes, thereby generating a press signal, thereby ensuring that the press detection device can perform press detection normally.

[0101] An embodiment of the present application further provides an electronic device, which includes a housing 301 and a pressure detection device as in any of the above embodiments, wherein the bracket 203 in the pressure detection device is fixed on the housing 301 .

[0102] In one example, the bracket 203 may be snap-fitted or attached to the housing 301 of the electronic device by means of a thermosetting adhesive. In another example, the bracket 203 may be fixed to the housing 301 of the electronic device by means of bolts, which is not limited herein.

[0103] In a possible implementation, the electronic device includes a laptop computer, and the bracket 203 in the pressure detection device is fixed on a C-shell of the laptop computer.

[0104] Fig.11 is a cross-sectional view of an electronic device provided in an embodiment of the present application, such as Fig.11 As shown, the bracket 203 in the press detection device is fixed to the C-shell of the notebook computer by bolts.

[0105] In an embodiment of the present application, the bracket 203 in the press detection device can be fixed to the C-shell of the laptop computer, so that the bracket 203 can be fixed to the housing 301 of the electronic device. Therefore, when the press detection device receives a press operation, for example: when the circuit board 201 is pressed, the second electrode 2042 on the bracket 203 can be deformed, so that the sensor 204 generates a press signal, thereby realizing the detection of the press operation.

[0106] It should be understood that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment, since it is basically similar to the method described in the device and system embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of other embodiments.

[0107] It should be understood that the above is a description of a specific embodiment of the present specification. Other embodiments are within the scope of the claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0108] It should be understood that an element described in singular form herein or shown in the drawings as only one does not limit the number of the element to one. In addition, modules or elements described or shown as separate herein may be combined into a single module or element, and modules or elements described or shown as single herein may be split into multiple modules or elements.

[0109] It should also be understood that the terms and expressions used herein are for description only, and one or more embodiments of this specification should not be limited to these terms and expressions. The use of these terms and expressions does not mean to exclude any equivalent features of the illustrations and descriptions (or parts thereof), and it should be recognized that various modifications that may exist should also be included in the scope of the claims. Other modifications, changes and substitutions may also exist. Accordingly, the claims should be deemed to cover all such equivalents.

Claims

1. A pressure detection device, applied to electronic equipment, characterized in that: include: Circuit boards, brackets, and multiple sensors; The sensor comprises a first electrode and a second electrode, wherein the first electrode and the second electrode are respectively connected to the lower surface of the circuit board, and a closed cavity is formed between the first electrode and the second electrode; The bracket is fixed on the housing of the electronic device, and the bracket abuts against the second electrode; When the pressure detection device receives a pressure operation, the second electrode is deformed, and the distance between the first electrode and the second electrode changes, so that the sensor generates a pressure signal; The circuit board is used to transmit the pressing signal to the control unit, and enable the control unit to identify the pressing operation according to the pressing signal.

2. The pressure detection device according to claim 1, characterized in that: The device further comprises: a cover plate; The upper surface of the cover plate provides a pressing surface, the lower surface of the cover plate is in contact with 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 is pressed, the pressing detection device receives the pressing operation.

3. The pressure detection device according to claim 1, characterized in that: The second electrode includes an integrally formed sensing portion, a deformation portion and a connecting portion; The sensing part is a disc-shaped structure, the connecting part is a ring-shaped structure, the radius of the sensing part is smaller than the inner radius of the connecting part, the sensing part and the connecting part are connected through the deformation part, the sensing part and the connecting part are in different planes, and the center line of the sensing part and the connecting part is perpendicular to the circuit board; The connecting portion is electrically connected to the lower surface of the circuit board, and the sensing portion is arranged opposite to the first electrode in a direction perpendicular to the circuit board; When the pressure detection device receives a pressure operation, the deformable portion is deformed, the sensing portion moves toward the first electrode, and the distance between the first electrode and the sensing portion changes, causing the sensor to generate the pressure signal.

4. The pressure detection device according to claim 3, characterized in that: In a direction perpendicular to the circuit board, the distance between the first electrode and the sensing portion ranges from [0.1 mm, 0.3 mm].

5. The pressure detection device according to claim 3, characterized in that: A circular electrical connection area is provided on the circuit board. The electrical connection area is electrically connected to the connection portion, and a center line connecting the electrical connection area and the connection portion is perpendicular to the circuit board.

6. The pressure detection device according to claim 5, characterized in that: The connecting portion is electrically connected to the electrical connection area through a conductive adhesive, or the connecting portion is electrically connected to the electrical connection area through soldering. When the connecting portion is electrically connected to the electrical connection area through the conductive adhesive, the difference between the outer circle radius and the inner circle radius of the electrical connection area is greater than or equal to 1 mm. When the connecting portion is electrically connected to the electrical connection area through soldering, the difference between the outer circle radius and the inner circle radius of the electrical connection area is greater than or equal to 0.5 mm.

7. The pressure detection device according to claim 5, characterized in that: The first electrode is a disc-shaped structure, a center line connecting the first electrode and the electrical connection area is perpendicular to the circuit board, and an area of ​​the first electrode is greater than or equal to 20 square millimeters; and / or, a difference between an inner radius of the electrical connection area and a radius of the first electrode is greater than or equal to 0.5 mm; And / or, the radius of the sensing portion is greater than or equal to the radius of the first electrode, and the first electrode is located within the edge of the projection of the sensing portion in a direction perpendicular to the circuit board.

8. The pressure detection device according to claim 1, characterized in that: The first electrode is integrated into the lower surface of the circuit board, or the first electrode is arranged on the lower surface of the circuit board.

9. The pressure detection device according to claim 1, characterized in that: The multiple sensors are distributed close to the edge of the circuit board, and the distances between the multiple sensors and the edge of the circuit board are all less than or equal to 5 mm.

10. The pressure detection device according to claim 3, characterized in that: The sensing part is abutted against the bracket through a silicone pad, and the distance between the edge of the sensing part and the edge of the silicone pad is greater than or equal to 0.5 mm. In a direction perpendicular to the circuit board, the projection of the silicone pad on the circuit board is located within the edge of the projection of the sensing part on the circuit board.

11. The pressure detection device according to claim 10, characterized in that: The thickness range of the silicone pad is [0.5mm, 1.0mm], and the Shore hardness of the silicone pad is A.

12. The pressure detection device according to claim 10, characterized in that: The sensing portion comprises a second through hole, and an edge of the second through hole is located inside the edge of the silicone pad; The second through hole is used to balance the air pressure on both sides of the second electrode in a direction perpendicular to the circuit board when the second electrode is electrically connected to the circuit board.

13. The pressure detection device according to claim 12, characterized in that: The diameter range of the second through hole is [0.6 mm, 1.0 mm].

14. The pressure detection device according to claim 1, characterized in that: The surface of the first electrode is covered with an insulating layer.

15. The pressure detection device according to claim 1, characterized in that: The thickness of the second electrode is in the range of [0.1 mm, 0.15 mm].

16. The pressure detection device according to claim 1, characterized in that: The circuit board is provided with a via hole penetrating the circuit board, the first electrode includes a third via hole, and in a direction perpendicular to the circuit board, the third via hole is opposite to the via hole; The first electrode is electrically connected to the control unit through an electrical connection line accommodated in the via hole; The third through hole is used to balance the air pressure on both sides of the second electrode in a direction perpendicular to the circuit board when the second electrode is connected to the circuit board.

17. The pressure detection device according to claim 16, characterized in that: The diameter range of the third through hole is [0.15mm, 0.3mm].

18. The pressure detection device according to any one of claims 1 to 17, characterized in that: The thickness of the bracket is greater than or equal to 0.5 mm.

19. An electronic device, characterized in that: comprising a housing and a pressure detection device as claimed in any one of claims 1 to 18; The bracket in the pressure detection device is fixed on the shell.

20. The device according to claim 19, characterized in that The electronic equipment includes: a laptop computer; The bracket in the pressure detection device is fixed to the C-shell of the notebook computer.

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