CN217443844U

CN217443844U - Touch pad, pressure touch device and electronic equipment

Info

Publication number: CN217443844U
Application number: CN202221045988.XU
Authority: CN
Inventors: 张胜斌; 王景; 王仁峰
Original assignee: Shenzhen Goodix Technology Co Ltd
Current assignee: Shenzhen Goodix Technology Co Ltd
Priority date: 2021-12-31
Filing date: 2022-04-29
Publication date: 2022-09-16
Anticipated expiration: 2032-04-29
Also published as: CN114779960A

Abstract

The application provides a touch pad and an electronic device, which have better structural performance. The touch panel includes: the touch control panel comprises a circuit board, a touch electrode layer and a touch sensing circuit, wherein the upper surface of the circuit board is provided with the touch electrode layer and is used for sensing a touch position of a finger when the finger touches or presses the touch control panel and outputting a corresponding touch sensing signal; the bracket is arranged below the circuit board and comprises a main body part and four extension parts which respectively extend from four corners of the main body part to the direction far away from the main body part, and the tail ends of the extension parts are provided with cantilever beams; the pressure sensor is arranged between the circuit board and the support and positioned on the cantilever beam, and is used for generating deformation when a pressing force generated when a finger touches or presses the touch pad is conducted to the cantilever beam and outputting a corresponding pressure sensing signal; and the touch controller is fixedly arranged on the circuit board, is electrically connected with the touch electrode layer and the pressure sensor, and is used for determining the touch position of the finger on the touch pad and the pressing force of the finger according to the touch sensing signal and the pressure sensing signal.

Description

Touch pad, pressure touch device and electronic equipment

Technical Field

The present disclosure relates to the field of touch control, and more particularly, to a touch pad, a pressure touch device, and an electronic device.

Background

A touch pad is a device that senses the position and movement of a user's finger through a touch sensor, thereby controlling the movement of a pointer on a display interface. The conventional touch pad detects a pressing action of a user through a physical key to execute functions such as confirming or calling out a menu. However, the conventional touch panel can detect a pressing operation only in an area below 1/2, and cannot detect a pressing operation in any area of the entire touch panel.

The pressure touch pad is a new replacement mode of the traditional touch pad, replaces physical keys through a pressure detection device and an actuator, realizes function confirmation and calls out operations such as menus, solves the problem that the traditional touch pad can only be locally pressed, can adjust the pressing response strength and the vibration feedback strength according to the use habits of users, and provides more convenient and comfortable operation experience for the users. The inner structure of the touch pad influences the vibration sense of a user when the user presses on different positions of the touch pad and influences the reliability of the touch pad when the touch pad is pressed.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a touch pad, a pressure touch device and electronic equipment, which have better structural performance.

In a first aspect, a touch pad is provided, which includes a circuit board, a pressure sensor, a bracket and a touch controller; the touch electrode layer is arranged on the upper surface of the circuit board and used for sensing the touch position of a finger when the finger touches or presses the touch pad and outputting a corresponding touch induction signal; the bracket is arranged below the circuit board and comprises a main body part and four extending parts which extend from four corners of the main body part towards the direction far away from the main body part, cantilever beams are arranged at the tail ends of the extending parts, and steps are formed between the cantilever beams and the tail ends of the extending parts, wherein fixing points for fixing the bracket are positioned at the tail ends of the extending parts, which are close to the steps; the pressure sensor is arranged between the circuit board and the support and positioned on the cantilever beam, and is used for generating deformation when a pressing force generated when the finger touches or presses the touch pad is transmitted to the cantilever beam and outputting a corresponding pressure sensing signal; the touch controller is fixedly installed on the circuit board, electrically connected with the touch electrode layer and the pressure sensor, and used for determining the touch position of the finger on the touch pad and the pressing force of the finger according to the touch sensing signal and the pressure sensing signal received by the touch electrode layer and the pressure sensor.

Because the support in this application embodiment has adopted the structure of four-jaw support, include the main part and certainly four angles of main part are towards keeping away from respectively four extensions that the direction of main part extends, the end of extension is provided with the cantilever beam, and pressure sensor sets up on the cantilever beam, has guaranteed the deformation uniformity between four angles of touch-control board and other regions, and has improved the structural strength of touch-control board, makes the touch-control board have better structural performance.

In one implementation mode, one end of the cantilever beam close to the step is a constraint end, one end of the cantilever beam far away from the step is a free end, the free end of the cantilever beam is provided with a silica gel pad, and the thickness of the silica gel pad is larger than that of the pressure sensor, so that a gap is formed between the pressure sensor and the circuit board.

In one implementation, a nut is provided at the fixing point for connection with a bolt to fix the bracket to the outer housing. Therefore, the connection stability of the pressure sensor is improved while the detection precision of the pressure sensor is ensured, and the thickness of the touch control plate is reduced.

In one implementation, a gap between the cantilever beam and the circuit board is smaller than a gap between the end of the extension portion and the circuit board, and the gap between the end of the extension portion and the circuit board is used for accommodating the nut.

In one implementation, the vertical distance from the fixed point to the short side of the touch pad is 8mm to 20mm, and/or the vertical distance from the fixed point to the long side of the touch pad is 5mm to 15 mm. The dimensions of the bracket are selected to be within the above range so that the fixing point is as small as possible from the edge of the cover plate, which is advantageous for the deformation of the four corners of the cover plate to be identical or close to the deformation of the other regions.

In one implementation, the length of the cantilever beam is between 8mm and 20mm, and/or the width of the cantilever beam is between 5mm and 15 mm. The size of the cantilever beam is selected to be within the range, so that the deformation effect of the pressure sensor is improved, and the detection sensitivity of the pressure sensor is improved.

In one implementation, the touch pad further includes: and the reinforcing plate is arranged below the circuit board. Through setting up the stiffening plate, can improve the rigidity of touch-control board, prevent that the finger from touching or causing the sinking of touch-control board when pressing the touch-control board.

In one implementation mode, the cantilever beam is fixed on the lower surface of the circuit board through the silica gel pad, and an avoidance hole is formed in the position, corresponding to the silica gel pad, of the reinforcing plate and used for accommodating the silica gel pad; or the cantilever beam is fixed on the lower surface of the reinforcing plate through the silica gel pad.

In one implementation, the touch pad further includes: the reinforcing strip is at least arranged on two sides of the long edge of the reinforcing plate, the thickness of the reinforcing strip is 0.2mm-2mm, and the length of the reinforcing strip is greater than the distance between two adjacent fixed points. Through setting up the reinforcement strip, can provide further support for the stiffening plate, strengthen the intensity and the hardness of touch-control board, cause the subsidence of touch-control board when preventing that the finger from touching or pressing the touch-control board.

In one implementation mode, the peripheral sides of the reinforcing plate or the long sides of the reinforcing plate are also provided with protruding reinforcing ribs to enhance the strength and hardness of the touch panel.

In one implementation, the reinforcing strip is elongated and disposed outside the reinforcing bar.

In one implementation manner, a limiting structure is arranged below the circuit board, is parallel to the long edge of the touch panel and is arranged in a long strip shape, and extends downwards to extend through the reinforcing plate and/or the hollow-out portion of the bracket. The accuracy of the pressure sensor is guaranteed, and meanwhile the sinking depth of the touch pad is limited, so that the phenomenon that the distance of the touch pad moving to one side of the bottom shell is too large when the touch pad is touched or pressed by fingers is avoided.

In one implementation, the touch pad further includes: FPC, FPC is the shape of buckling, FPC's both ends are used for connecting adjacent two on the cantilever beam pressure sensor, the extension between FPC's the both ends is connected to the circuit board.

In one implementation, the touch pad further includes: the actuator is arranged on the lower surface of the circuit board, electrically connected with the touch controller and used for responding to the pressing force of the fingers to perform vibration feedback, and the support and/or the reinforcing plate are/is provided with avoidance holes for accommodating the brake.

In one implementation, the bracket is provided with a through hole, and the through hole is used for reducing the weight of the bracket.

In a second aspect, a pressure touch device is provided, which includes: the cover plate is used for providing an input interface for the touch or pressing of fingers; the circuit board is arranged below the cover plate, a touch electrode layer is arranged on the upper surface of the circuit board, and the touch electrode layer is used for sensing the touch position of a finger when the finger touches or presses the touch pad and outputting a corresponding touch induction signal; the support is arranged below the circuit board, is used for supporting the circuit board, and comprises four extension parts which respectively extend from the central point of the support to four corners of the cover plate, and the tail ends of the extension parts are provided with cantilever beams; the pressure sensor is arranged between the circuit board and the support and positioned on the cantilever beam, and is used for generating deformation when the pressing force generated when the finger touches or presses the touch pad is transmitted to the cantilever beam and outputting a corresponding pressure sensing signal; the actuator is arranged on the lower surface of the circuit board, electrically connected with the touch controller and used for responding to the pressing force of the fingers and performing vibration feedback, and the bracket is provided with an avoiding hole used for accommodating the brake; and the touch controller is fixedly installed on the circuit board, is electrically connected with the touch electrode layer and the pressure sensor, and is used for determining the touch position of the finger on the touch pad and the pressing force of the finger according to the touch sensing signal and the pressure sensing signal received from the touch electrode layer and the pressure sensor.

In one implementation, a step is formed between the cantilever beam and the extension end, wherein the fixing point for fixing the bracket is located at the extension end near the step.

In one implementation, the cover plate is connected with the circuit board through any one of the following adhesive layers: thermosetting adhesive, AB adhesive, moisture curing adhesive, hot melt adhesive film, PSA, UV delayed curing adhesive and low-temperature single-component curing adhesive, so that the integral rigidity of the panel is improved, and the deformation consistency is ensured.

In a third aspect, an electronic device is provided, including: a display; and the touch pad of the first aspect or any implementation manner of the first aspect, the touch pad is configured to detect a touch position of a finger and a magnitude of a pressing force of the finger when the finger touches or presses, and the display is configured to display an operation related to the touch or pressing of the finger.

Drawings

Fig. 1 is an exploded view of a touch panel according to an embodiment of the present application.

Fig. 2 is a schematic view of a stent according to an embodiment of the present application.

Fig. 3 is a cross-sectional view of the touch pad shown in fig. 1 taken along the direction a-a'.

Fig. 4 is a cross-sectional view of the touch pad shown in fig. 1 taken along the direction B-B'.

Fig. 5 is a schematic structural diagram of a cantilever beam according to an embodiment of the present application.

Figure 6 is a schematic view of the orientation of the cantilever beam of an embodiment of the present application.

Fig. 7 is an exploded view of a touch panel according to an embodiment of the present application.

Fig. 8 is a bottom view of the touch pad shown in fig. 7.

Fig. 9 is an exploded view of a touch panel according to an embodiment of the present application.

Fig. 10 is a bottom view of the touch pad shown in fig. 9.

Fig. 11 is a schematic diagram of an electronic device according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the examples of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solutions claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be mutually incorporated and referred to without contradiction.

In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and therefore should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. "vertical" is not strictly vertical, but is within the tolerance of the error. "parallel" is not strictly parallel, but within the tolerance of the error.

The following description is given with the directional terms as they are used in the drawings and not intended to limit the specific structure of the present application. In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.

Fig. 1 to 4 show a structure of a touch panel according to an embodiment of the present application. Fig. 1 is an exploded view of a touch panel 1 according to an embodiment of the present disclosure; FIG. 2 is a schematic view of the stent of FIG. 1; FIG. 3 is a cross-sectional view of the touch pad 1 shown in FIG. 1 along the direction A-A'; fig. 4 is a cross-sectional view of the touch panel 1 shown in fig. 1 along the direction B-B'.

As shown in fig. 1, the touch panel 1 includes a cover plate 12, a circuit board 11, a pressure sensor 22, and a bracket 21, which are sequentially arranged from top to bottom.

The cover 12 may be, for example, a glass cover or other protective cover, and is mainly used to provide an input surface for finger touch or pressing, and to protect the circuit board 11 and the pressure sensor 22 under the cover 12. In a specific operation, a user can touch or move the input surface provided by the cover 12 with a finger to control the electronic device to execute instructions related to the touch operation or to control a pointer of a display interface of the electronic device to move. Also, the finger may synchronously press the cover plate 12 to apply a downward pressure to the touch pad 1 when the cover plate 12 is touched or moved to control the electronic device to execute an instruction related to the pressing operation. It should be understood that although the present embodiment is exemplified by a glass cover or a protective cover, the cover 12 may also be other functional components of an electronic device, such as a component with a display function, in some specific application scenarios.

The Circuit Board 11 may be, for example, a Printed Circuit Board Assembly (PCBA). The circuit board 11 is fixedly connected with the cover plate 12 through the first adhesive layer 13, and a touch electrode layer is laid on the upper surface of the circuit board 11, and the touch electrode layer is mainly used for detecting the touch position of a finger on the cover plate 12 and the movement of the finger on the cover plate 12, and outputting the position coordinate information of the finger touch or dynamic vector information generated by the finger movement to a main controller of the electronic device. Besides carrying and supporting the touch electrode layer, the touch panel can also carry electronic components and circuits of the touch panel. The electronic components include, for example, a touch controller and an actuator 30. The touch controller is mounted on the lower surface of the circuit board 11, and is electrically connected to the touch electrode layer and the pressure sensor 22 through a connection line of the circuit board 11, and is configured to provide a driving signal to the touch electrode layer to drive capacitive touch detection, and on the other hand, receive a touch sensing signal and a pressure sensing signal output by the touch electrode layer and the pressure sensor 22 when a finger presses on the touch pad 1, and determine finger position information and a pressing force of the finger based on the touch sensing signal and the pressure sensing signal. Also, the touch controller may be further connected to the actuator 30, and further configured to respond to the detected magnitude of the pressure and drive the actuator 30 for vibration feedback. In a specific embodiment, the touch controller may be a touch chip integrating pressure detection and touch position detection, or may include two separately arranged pressure detection chips for detecting pressure and touch position. The actuator 30 may be a linear motor or a piezoelectric ceramic, etc.

The pressure sensor 22 is, for example, a resistance-type pressure sensor, also called a piezoresistive force sensor, which is disposed on the support 21. In one implementation, as shown in fig. 1, the pressure sensor 22 may be a strain gauge disposed on a cantilever beam 213 of the bracket 21, and the cantilever beam 213 is adhered to the lower surface of the circuit board 11 by an elastic pad 214, such as a silicone pad or the like. When a finger presses the touch pad 1, the pressing force of the finger can be transmitted to the strain gauge 221 through the cantilever beam 213, so that the strain gauge 221 deforms, and further, the resistance value changes, and the magnitude of the pressure can be calculated according to the resistance value change.

The bracket 21 is, for example, a metal bracket for providing a supporting function for the pressure sensor 22 and mounting the touch panel 1 to the external case 40. In the embodiment of the present application, as shown in fig. 2, the bracket 21 includes a main body portion 211 and four extending portions 212 extending from four corners of the main body portion 211 toward a direction away from the main body portion 21, and the ends of the extending portions 212 are provided with cantilever beams 213. Wherein pressure sensor 22 is disposed on cantilever beam 213. Step 216 is formed between cantilever beam 213 and the end of extension 212, wherein fixing point 2121 for fixing bracket 21 is located at the end of extension 212 near step 216. The fixing point 2121 is used for fixing between the holder 21 and the outer case 40, for example. Because the support 21 in the embodiment of the present application adopts a structure similar to four claws, the consistency of deformation between four corners of the touch panel 1 and other areas is ensured, the structural strength of the touch panel 1 is improved, and the touch panel 1 has better structural performance.

The actuator 30 may also be referred to as a haptic actuator, and may be, for example, a Linear-resonant actuator (LRA) for vibrating in a direction parallel to the circuit board 11. By providing a linear resonant actuator in the central region of the touch pad 10, the consistency of the touch pad vibrations can be improved.

The actuator 30 may be provided, for example, in the middle region of the touch panel 1, and in order to avoid the actuator 30, a window 2111 may be provided in the middle region of the main body portion 211, and the main body portion 211 of the bracket 21 may be shaped into a frame so as to avoid the actuator 30.

For example, the actuator 30 is rectangular, the main body portion 211 may be configured as a rectangular frame, and the size of the opening 2111 formed by the rectangular frame reserves a suitable space for the actuator 30, and does not occupy the space at other positions of the touch pad 1, so as to reserve a space for other electronic components of the touch pad 1 to a greater extent, which is beneficial to improving the utilization rate of other spaces of the touch pad 1.

In one implementation, the cantilever beam 213 is provided with an elastic pad 214, such as a silicone pad 214, and the thickness of the silicone pad 214 is greater than that of the pressure sensor 22, so that a gap is formed between the pressure sensor 22 and the circuit board 11.

As shown in fig. 1, the pressure sensor 22 is, for example, a strain gauge, the strain gauge is disposed on a cantilever beam 213 of the bracket 21, and the cantilever beam 213 is adhered to the lower surface of the circuit board 11 or the reinforcing plate 14 by a silicone rubber pad 214. When a finger presses the touch pad 1, the pressing force of the finger can be transmitted to the strain gauge through the cantilever beam 213, so that the strain gauge deforms, the resistance value changes, and the pressure can be calculated according to the change of the resistance value. The cantilever beams 213 are arranged at the tail ends 2121 of the four extending parts 12 of the bracket, and the thickness of the silica gel pad 214 on the cantilever beams 213 is larger than that of the pressure sensor 22, so that a gap is formed between the pressure sensor 22 and the circuit board 11, the pressing force of a finger can be detected conveniently, and the pressure detection precision is ensured.

The silicone pad 214 may be double-sided adhesive backed. The silicone pad 214 may also be adhered between the lower surface of the circuit board 11 and the upper surface of the cantilever beam 213 or between the lower surface of the reinforcing plate 14 and the upper surface of the cantilever beam 213 by glue.

When a finger applies a pressing force on the touch pad 1, the touch controller detects that the pressing force reaches a threshold value, and triggers the actuator 30 to generate vibration, the silicone pad 214 has a damping effect on the vibration, so that the vibration amplitude of the whole touch pad 1 can be reduced, and the vibration amplitude can be quickly restored to a stable state, thereby ensuring that the vibration amplitudes on different areas of the touch pad 1 tend to be the same, balancing the vibration difference of different areas, improving the vibration consistency of the touch pad 1, and improving the user experience.

Hereinafter, the end of the cantilever 213 close to the step 216 is referred to as the constrained end of the cantilever 213, and the end of the cantilever 213 far from the step 216 is referred to as the free end of the cantilever 213. A silicone pad 214 is located, for example, at the free end of the cantilever beam 213.

The silicone pad 214 and the pressure sensor 22 may be disposed on the same side of the cantilever beam 213, e.g., both disposed on the upper surface of the cantilever beam 213; alternatively, the silicone pad 214 and the pressure sensor 22 are respectively disposed on two sides of the cantilever beam 213, for example, the silicone pad 214 is disposed on the upper surface of the cantilever beam 213, and the pressure sensor 22 is disposed on the lower surface of the cantilever beam 213.

In order to reduce the weight of the bracket 21, as shown in fig. 1 to 4, at least one through hole 2122 may be provided on the extension 212, and the through hole 2122 serves to reduce the weight of the bracket 21.

As shown in fig. 1 to 4, the outer case 40 is provided with a groove 401 for accommodating the touch pad 1. An avoidance region 403 for avoiding components on the circuit board 11 is also provided in the groove 401 of the housing 40.

In one implementation, a fastener such as a nut 2151 is provided at a fixing point 2121 of the bracket 21, the nut 2151 is adapted to couple with a bolt 2152 to secure the bracket 21 to the housing 40, and the nut 2151 may be secured to the fixing point 2121, for example, by laser spot welding or the like, on a welding surface 2153. The depth of the step 216 may be greater than or equal to the height of the nut 2151 to accommodate the nut 2151, which improves the connection stability of the pressure sensor 22 while ensuring the detection accuracy thereof, and reduces the thickness of the touch panel 1.

A through hole 402 for avoiding the bolt 2152 is provided in the groove 401 of the housing 40. The bolt 2152 passes through the through hole 402 and is fixedly connected to the nut 2151, so that the bracket 21 is fixed to the housing 40 at the fixing point 2121 of the bracket, thereby fixing the bracket 21 to the housing 40.

The number of fastening turns between the nut 2151 and the bolt 2152 may be, for example, 2.5 or more turns. When only one nut 2151 is provided at the fixing point 2121 of the bracket 21, for example, a nut 2151 of specification M2 may be employed and arranged on the width center line of the cantilever beam 213. The skirt thickness of the welded nut 2151 may be, for example, 0.12mm to 0.20mm, and the riveted nut 2151 is spot-welded at the riveting surface along the riveted joint. This arrangement ensures the effectiveness of spot welding while ensuring the stability of the connection between the nut 2151 and the housing 40.

Further, gaps may be provided between the main body portion 211 of the bracket 21 and the circuit board 11 or between the main body portion 211 of the bracket 21 and the reinforcing plate 14, and between the cantilever beam 213 and the housing 40, so as to form a deformation space of the cantilever beam 213 while ensuring the connection stability of the main body portion 211 and the housing 40.

In one implementation, the gap between the cantilever beam 213 and the circuit board 11 is smaller than the gap between the end of the extension 212 and the circuit board 11, and the gap between the end of the extension 212 and the circuit board 11 is used for accommodating the nut 2151, so that no additional space needs to be reserved for the nut 2151, and the thickness of the touch pad 1 is reduced.

The dimensions of the cantilever beam 213 should be as small as possible to ensure that the deformation of the four corners of the touch pad 1 is consistent with or close to the deformation of other areas. For this purpose, the length of the cantilever beam 213 may be set between 8mm and 20mm, and further between 12mm and 14mm, for example, the length is about 12.95 mm; and/or the width of the cantilever beam 213 is set between 5mm and 15mm, and further between 7mm and 9mm, for example, the width is about 8.5 mm. Both guaranteed the space that is used for setting up pressure sensor 22 and silica gel pad 214 on the cantilever beam 213, made cantilever beam 213 have less size again, be favorable to promoting pressure sensor 11's deformation effect, promoted four angles of touch pad 1 and the deformation uniformity between other regions.

In one implementation, the vertical distance from the fixing point 2121 of the bracket 21 to the short side of the touch pad 1 is between 8mm and 20mm, and further between 12mm and 14 mm; and/or the vertical distance from the fixing point 2121 to the long side of the touch pad 1 is between 5mm and 15mm, and further between 7mm and 9 mm. The size of the bracket 21 is selected to be within the above range, so that the position of the fixing point 2121 from the edge of the touch pad 1 is as small as possible, which is beneficial to make the deformation amount of the four corners of the touch pad 1 consistent with or close to that of other areas, and improve the detection accuracy of the pressure sensor 22.

Fig. 5 (a) and (b) show a top view and a side view of cantilever beam 213, respectively. The pressure sensor 22 includes strain gauges 221, and fig. 5 illustrates 4 strain gauges 221 as an example. The solder joint 222 is used to connect the FPC of the pressure sensor 22, and the pressure signal received by the strain gauge 221 can be transmitted to the circuit board 11 through the traces on the FPC.

The strain gauge 221 may also be referred to as a strain gauge, for example, a wheatstone full bridge resistive metal strain gauge or a semiconductor silicon grade strain gauge may be used, and the substrate size of the pressure sensor 22 may be 7.2mm × 7.9mm, for example.

As shown in fig. 5, a dimension a is a width of the free end of the cantilever beam 213, a dimension b is a length of the free end of the cantilever beam 213, a dimension c is a thickness of the free end of the cantilever beam 213, a dimension d is a size of a deformation space of the cantilever beam 213, a dimension e is a thickness of the silicone pad 214, a dimension f is a distance between the pressure sensor 22 and a root of the constraint end of the cantilever beam 213, a dimension g is a distance between the pressure sensor 22 and the silicone pad 214, a dimension h is a distance between the silicone pad 214 and a short-side edge of the cantilever beam 213, a dimension j is a distance between the silicone pad 214 and a long-side edge of the cantilever beam 213, a dimension k is a distance between the pressure sensor 22 and the long-side edge of the cantilever beam 213, a dimension m is a length of the silicone pad 214, and a dimension n is a width of the silicone pad 214.

The dimensions should be set so that the overall dimensions of the cantilever beam 213 are as small as possible to ensure that the amount of deformation at the four corners of the touch panel 1 coincides with or is close to the amount of deformation at other areas. As an example, the length a of the cantilever beam may be, for example, between 8mm and 20mm, further between 12mm and 14mm, for example 12.95 mm; the width b of the cantilever beam may for example be between 5mm and 15mm, further between 7mm and 9mm, for example 8.5 mm.

The distance w between the short edge of the cantilever beam 213 and the position of the fixing point 2121 may be, for example, between 10 and 20mm, and further between 15mm and 16 mm.

The cantilever beam 213 may be made of SUS301, for example, in which case the thickness c of the free end of the cantilever beam 213 may be set to be 0.5mm at minimum; or 2a 12T 4, the thickness c of the free end of the cantilever beam 213 can be set to 0.8 mm.

When the pressure sensor 22 and the silicone pads 214 are on the upper and lower sides of the cantilever beam 213, the size d of the deformation space of the cantilever beam 213 may be set to be, for example, greater than or equal to 0.7mm, in consideration of the thickness of the circuit board 11, the FPC 223, and the like.

When the silicone pad 214 is a double-sided adhesive tape, the thickness of the silicone pad 214 includes the thickness of the silicone layer and the thickness of the double-sided adhesive tape located on both sides of the silicone layer, and may be set to 0.7mm, for example.

The distance f between the pressure sensor 22 and the root of the constrained end of the cantilever beam 213, and the distance g between the pressure sensor 22 and the silicone pad 214 may each be set to 0.75mm, for example. When the bonding accuracy is sufficiently high, f and g can be further reduced to 0.75mm or less.

The distances h and j between the silicone pad 214 and the outer edge of the cantilever beam 213 should not exceed the edge of the cantilever beam 213 and may be set to 0.25mm, for example.

The distance k between pressure sensor 22 and the outer edge of cantilever beam 213 should not exceed the edge of cantilever beam 213 and may be set to 0.3mm, for example.

The length m and the width n of the silicone pad 214 may be set to 8mm and 4mm, respectively, for example.

The orientation and angle of cantilevered beam 213 may be determined by the present application based on the size and configuration of cantilevered beam 213. For example, cantilever beam 213 may be oriented parallel to the direction of extension of its corresponding extension 212; alternatively, cantilever beam 213 is oriented perpendicular to the direction of extension 212; alternatively, the cantilever beam 213 is oriented parallel to the short side of the body portion 211; alternatively, the direction of the cantilever beam 213 is parallel to the long side of the body portion 211; alternatively, the direction of the cantilever beam 213 corresponding to two extended portions 212 of the four extended portions 212 is parallel to the short side or the long side of the main body portion 211, and the direction of the cantilever beam 213 corresponding to the other two extended portions 212 is perpendicular to the extending direction of the extended portions 212. Here, the directions of the cantilever beams 213 are both the longitudinal directions of the cantilever beams 213.

Preferably, as shown in fig. 1 and 2, the cantilever beam 213 is parallel to the long side direction of the main body portion 211, and the free end of the cantilever beam 213 is outward along the long side of the main body portion 211, so that the manufacturing of the bracket 21 is simple while the deformation consistency between the four corner positions and other regions is ensured.

The pressure sensors 22 are located at four corners of the touch pad 1, and two adjacent pressure sensors 22 form a group, and are symmetrically distributed with the other group of pressure sensors 22 along the center line of the major axis or the center line of the minor axis of the touch pad 1. Pressure detection of the touch panel 1 having an area of, for example, 150mm × 90mm or 170mm × 90mm can be supported.

Figure 6 illustrates several possible orientations of cantilever beam 213. The stent 21 in fig. 6 adopts a structure of a single-axis or double-axis symmetric four-jaw stent.

The cantilever beams 213 shown in fig. 6 (a) are parallel to the extending direction of the corresponding extending portion 212, only one pair of cantilever beams 213 are shown in fig. 6 (a), and the other pair of cantilever beams 213 are symmetrically arranged along the long-side central axis of the touch pad 10.

The cantilever beams 213 shown in fig. 6 (b) are perpendicular to the extending direction of the corresponding extending portion 212, only one pair of cantilever beams 213 are shown in fig. 6 (b), and the other pair of cantilever beams 213 are symmetrically arranged along the long-side central axis of the touch panel 10.

The cantilever beams 213 shown in (c) and (d) of fig. 6 are parallel to the short side direction of the main body portion 211, and only one cantilever beam 213 is shown in (c) and (d) of fig. 6, wherein the free end of the cantilever beam 213 shown in (c) of fig. 6 is inward along the short side of the main body portion 211, and the free end of the cantilever beam 213 shown in (d) of fig. 6 is outward along the short side of the main body portion 211.

The cantilever beams 213 shown in (e) and (f) of fig. 6 are parallel to the long side direction of the main body portion 211, and only one cantilever beam 213 is shown in (e) and (f) of fig. 6, wherein the free end of the cantilever beam 213 shown in (e) of fig. 6 is outward along the long side of the main body portion 211, and the free end of the cantilever beam 213 shown in (f) of fig. 6 is inward along the long side of the main body portion 211.

As shown in fig. 6 (g), the direction of the cantilever beam 213 corresponding to two of the four extended portions 212 is parallel to the short side of the main body portion 211, and the direction of the cantilever beam 213 corresponding to the other two extended portions 212 is perpendicular to the extending direction of the extended portions 212. Fig. 6 (g) shows only one pair of cantilever beams 213, and the other pair of cantilever beams 213 are symmetrically disposed along the central axis of the long side of the touch panel 10.

In one implementation, as shown in fig. 1 to 4, the touch panel 1 further includes a reinforcing plate 14 disposed below the circuit board 11. By providing the reinforcing plate 14, the rigidity of the touch panel 1 can be improved, and the touch panel 1 can be prevented from sagging when a finger touches or presses the touch panel 1.

The circuit board 11 and the reinforcing plate 14 are adhered together through a second adhesive layer 15. It should be understood that when the cover 12 is rigid enough, for example, when the cover 12 is soda lime glass with a thickness of 1.0mm or more, the touch panel 1 may not be provided with the reinforcing plate 14.

In one implementation manner, as shown in fig. 1 to 4, the cantilever beam 213 is fixed on the lower surface of the circuit board 11 through a silicone pad 214, and an avoiding hole for avoiding the silicone pad 214 is provided at a position, corresponding to the silicone pad 214, on the reinforcing plate 14, for accommodating the silicone pad 214; alternatively, the cantilever beam 213 is fixed to the lower surface of the reinforcing plate by a silicone pad 214.

That is, the cantilever beam 213 can be adhered to the lower surface of the reinforcing plate 214 through the silicone pad 214; the cantilever beam 213 may also be adhered to the lower surface of the circuit board 11 through the silicone pad 214, and at this time, an avoiding hole is disposed at a corresponding position on the reinforcing plate 14 to avoid the silicone pad 214. There may be a gap between the pressure sensor 22 and the stiffener 14.

In one implementation, as shown in fig. 7 to 10, the touch panel 1 further includes a reinforcing strip 141 disposed at least on two sides of the long side of the reinforcing plate 14, the thickness of the reinforcing strip 141 may be, for example, between 0.2mm and 2mm, and further greater than 0.8mm, and the length of the reinforcing strip 141 is greater than the distance between the fixing points 2121 of two adjacent brackets 21. By providing the reinforcing bars 141, further support can be provided for the reinforcing plate 14, the strength and hardness of the touch panel 1 can be enhanced, and sagging of the touch panel 1 caused by fingers touching or pressing the touch panel 1 can be prevented without affecting the pressure detection of the touch panel 1.

In one implementation, as shown in fig. 7 to 10, a protruding rib 142 is further provided on the peripheral side of the reinforcing plate 14 or the long side of the reinforcing plate 14 to enhance the strength and hardness of the touch panel 1.

In one implementation, as shown in fig. 7 to 10, the reinforcing bars 141 are elongated and disposed outside the reinforcing ribs 142.

For example, as shown in fig. 7 and 8, the reinforcing rib 142 protruding from the long side and the short side of the reinforcing plate 14 is provided, and two long reinforcing bars 141 and two short reinforcing bars 141 are respectively provided on the reinforcing plate 14 on both sides of the reinforcing rib 142 located on the long side, wherein one side of the reinforcing plate 14 is a side close to the edge of the long side of the touch panel 1, and a relatively long reinforcing bar 141 is provided, and a relatively short reinforcing bar 141 is provided on the other side of the reinforcing plate 14 to avoid the bracket 21.

For example, as shown in fig. 9 and 10, the reinforcing plate 14 is not provided with the reinforcing ribs 142, the reinforcing strips 141 are provided on both sides of the long side of the reinforcing plate 14, and the reinforcing strips 141 are shaped in a different manner so as to be offset from the hollow portions of the bracket 21.

In one implementation, as shown in fig. 7 to 10, the touch panel 1 further includes a Flexible Printed Circuit (FPC) 223, the FPC 223 is in a bent shape, two ends of the FPC 223 are used for connecting the pressure sensors 22 on two adjacent cantilever beams 213, and a protruding portion 2331 between the two ends of the FPC 223 is connected to the Circuit board 11. The FPC 223 may have a serpentine shape or S-shape, for example, and is disposed under the circuit board 11, and when a pressure is applied, the bent configuration can reduce a tensile force generated by deformation of the FPC 223, thereby functioning like a spring to protect the FPC 223.

In one implementation, as shown in fig. 7 and 9, a position limiting structure 111 is disposed below the circuit board 11, the position limiting structure 111 is, for example, parallel to the long side of the touch pad 1 and is disposed in a long strip shape, and extends downward through the reinforcing plate 14 and/or the hollow portion of the bracket 21, the position limiting structure 111 may be disposed on both sides of the main body portion 211 of the bracket 21, the height value of the position limiting structure 111 is greater than the distance value between the bracket 21 and the circuit board 11, and a gap is left between the position limiting structure 111 and the housing 40. The depth of depression of the touch panel 1 is limited while ensuring the accuracy of the pressure sensor 22, thereby preventing the touch panel 1 from moving too far to the bottom case side when a finger touches or presses the touch panel 1.

In one implementation, the touch panel 1 further includes an actuator 30 mounted at a central position of the lower surface of the circuit board 11 and electrically connected to the touch controller for responding to the pressing force of the finger and performing vibration feedback, and the bracket 21 and/or the reinforcing plate 14 are provided with an avoiding hole for avoiding the actuator 30 and accommodating the actuator 30. In another implementation, the actuator 30 is mounted on a side near the long edge of the circuit board 11 to avoid the battery under the center of the touch pad 1, so as to prevent the actuator 30 from colliding with the battery when a finger touches or presses the touch pad 1.

Optionally, as shown in fig. 8 and 10, an antistatic film 112 may be further disposed on the reinforcing plate 14 to alleviate static electricity generated on the circuit board 11.

In addition, optionally, the reinforcing plate 14 may further be provided with a notch 151 for avoiding the nut 2151, so as to avoid the nut 2151, so that the nut 2151 is accommodated in the notch 151 and located below the circuit board 11, so as to further reserve a space for the nut 2151, thereby reducing the thickness of the touch panel 1.

As an example, the thickness and material of each stacked layer in the stacked layer structure of the above-described touch panel 1 are shown in table one. When the thickness of the cover plate 12 is less than 1.0mm, the first adhesive layer 13 and the second adhesive layer 15 may be any one of the following materials: any one of thermosetting Adhesive, AB Adhesive, moisture-curable Adhesive, hot-melt Adhesive film, double-sided Pressure-Sensitive Adhesive (PSA), UV-delayed curing Adhesive, and low-temperature single-component curing Adhesive, so as to improve the overall rigidity of the touch panel 1. The thermosetting adhesive is, for example, a low-temperature thermosetting adhesive with a temperature of 85 ℃ or lower, so as to avoid the problem that the warpage of the circuit board 11 is aggravated due to an over-high temperature and the control of the assembly size is influenced.

Watch 1

When the stack structure shown in fig. 1 to 4, 7 and 9 is fabricated based on the parameters shown in table one, it is possible to achieve a deformation amount of the touch pad 1 (e.g., the assembly including the cover plate 12, the PCBA 11 or the stiffener 14) of less than 50um under a load of 750gf, such that a longitudinal movement of less than or equal to 0.6mm is achieved when the load is 750gf, and a longitudinal movement of less than or equal to 0.2mm is achieved when the actuator 30 triggers the load of 200 gf. It can be seen that, the touch pad 1 of the embodiment of the present application adopts the above-mentioned laminated structure, and has a better structural performance, that is, the consistency of the vibration of the four corners and the middle area of the touch pad 1 is ensured, and the touch pad 1 also has a certain rigidity, so as to prevent the touch pad 1 from sinking when a finger touches or presses the touch pad 1.

It should be understood that, in the embodiment of the present application, the bracket 21 may not include the main body portion 211 and the extension portion 212, but only include the cantilever beam 213, so as to form a separate cantilever beam structure. For example, the cantilever beam 213 may be disposed at four corners of the touch panel, the four corners of the reinforcing plate 14 are disposed with avoiding holes to avoid the cantilever beam 213, the cantilever beam 213 is disposed with the pressure sensor 22, and the cantilever beam 213 is adhered to the circuit board 11 or the lower portion of the four corners of the reinforcing plate 14 through the silicone pad 214. For the detailed description of each component in the separated cantilever structure, reference may be made to the foregoing description, and for brevity, the detailed description is omitted here.

The present application further provides a pressure touch device, including the pressure touch pad 1 described in any of the above embodiments. As shown in fig. 1 to 4, the pressure touch device includes a cover plate 12, a circuit board 11, a bracket 21, a pressure sensor 22, an actuator 30, and a touch controller.

The cover 12 is used to provide an input interface for the touch or pressing of a finger.

The circuit board 11 is disposed under the cover 12, and a touch electrode layer is disposed on an upper surface of the circuit board and is configured to sense a touch position of a finger when the finger touches or presses the touch pad, and output a corresponding touch sensing signal.

The bracket 21 is disposed below the circuit board 111, is used for supporting the circuit board 11, and includes four extending portions 212 extending from a central point of the bracket 11 to four corners of the cover plate 12, respectively, and an end of the extending portion 212 is provided with a cantilever beam 213.

And the pressure sensor 22 is arranged between the circuit board 11 and the support 21 and located on the cantilever beam 213, and is used for generating deformation when a pressing force generated when a finger touches or presses the touch pad 1 is transmitted to the cantilever beam 213, and outputting a corresponding pressure sensing signal.

The actuator 30 is mounted on the lower surface of the circuit board 11 and electrically connected to the touch controller for responding to the pressing force of the finger and performing vibration feedback, and the bracket 21 has an escape hole for accommodating the actuator 30.

The touch controller is fixedly installed on the circuit board 11, electrically connected to the touch electrode layer and the pressure sensor 22, and configured to determine a touch position of the finger on the touch panel 1 and a pressing force of the finger according to the touch sensing signal and the pressure sensing signal received from the touch electrode layer and the pressure sensor 22.

The present application further provides an electronic device, as shown in fig. 11, the electronic device includes a display 402 and the pressure touch pad 1 described in any of the above embodiments, the touch pad 1 is used for detecting a touch position of a finger and a magnitude of a pressing force of the finger when the finger touches or presses, and the display 402 is used for displaying an operation related to the touch or pressing of the finger.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A touch panel, comprising: the device comprises a circuit board, a pressure sensor, a bracket and a touch controller;

the touch electrode layer is arranged on the upper surface of the circuit board and used for sensing the touch position of a finger when the finger touches or presses the touch pad and outputting a corresponding touch induction signal;

the bracket is arranged below the circuit board and comprises a main body part and four extending parts which extend from four corners of the main body part towards the direction far away from the main body part, cantilever beams are arranged at the tail ends of the extending parts, and steps are formed between the cantilever beams and the tail ends of the extending parts, wherein fixing points for fixing the bracket are positioned at the tail ends of the extending parts, which are close to the steps;

the pressure sensor is arranged between the circuit board and the support, is positioned on the cantilever beam, and is used for generating deformation when a pressing force generated when the finger touches or presses the touch pad is transmitted to the cantilever beam and outputting a corresponding pressure sensing signal;

the touch controller is fixedly installed on the circuit board, electrically connected with the touch electrode layer and the pressure sensor, and used for determining the touch position of the finger on the touch pad and the pressing force of the finger according to the touch sensing signal and the pressure sensing signal received from the touch electrode layer and the pressure sensor.

2. The touchpad as claimed in claim 1, wherein one end of the cantilever beam near the step is a constrained end, and one end of the cantilever beam far from the step is a free end, and the free end of the cantilever beam is provided with a silica gel pad, and the thickness of the silica gel pad is greater than that of the pressure sensor, so that a gap is formed between the pressure sensor and the circuit board.

3. The touchpad as claimed in claim 1, wherein a nut is provided at the fixing point for connection with a bolt to secure the support to an external housing.

4. The trackpad of claim 3, wherein a gap between the cantilevered beam and the circuit board is less than a gap between the distal end of the extension and the circuit board for receiving the nut.

5. Touch pad according to claim 1, wherein the fixed point is at a vertical distance of between 8mm and 20mm from the short side of the touch pad and/or between 5mm and 15mm from the long side of the touch pad.

6. The touchpad as claimed in claim 1, wherein the cantilevered beam has a length of between 8mm and 20mm and/or a width of between 5mm and 15 mm.

7. The touch pad of any one of claims 2-6, further comprising:

and the reinforcing plate is arranged below the circuit board.

8. The touch pad of claim 7,

the cantilever beam is fixed on the lower surface of the circuit board through a silica gel pad, and a position, corresponding to the silica gel pad, on the reinforcing plate is provided with an avoidance hole for accommodating the silica gel pad; alternatively, the first and second electrodes may be,

the cantilever beam passes through the silica gel pad is fixed the lower surface of stiffening plate.

9. The trackpad of claim 7, further comprising:

the reinforcing bar is arranged on two sides of the long edge of the reinforcing plate at least, the thickness of the reinforcing bar is 0.2mm-2mm, and the length of the reinforcing bar is larger than the distance between two adjacent fixed points.

10. The touch panel of claim 9, wherein a protruding rib is further disposed on the peripheral side of the stiffener or the long side of the stiffener.

11. The touch panel of claim 10, wherein the reinforcing strip is elongated and disposed outside the reinforcing rib.

12. The touch panel of claim 7, wherein a limiting structure is disposed below the circuit board, and the limiting structure is parallel to a long side of the touch panel, is disposed in a strip shape, and extends downward through the reinforcing plate and/or the hollow portion of the bracket.

13. The touch pad of claim 1, further comprising:

the flexible printed circuit FPC, FPC is the shape of buckling, FPC's both ends are used for connecting adjacent two on the cantilever beam pressure sensor, the protruding portion between FPC's both ends is connected to the circuit board.

14. The trackpad of claim 13, further comprising:

the actuator is arranged on the lower surface of the circuit board, electrically connected with the touch controller and used for responding to the pressing force of the fingers to perform vibration feedback, and the support and/or the reinforcing plate are/is provided with avoidance holes for accommodating the actuator.

15. The touch pad of claim 1, wherein the bracket is provided with a through hole for reducing the weight of the bracket.

16. A pressure touch device, comprising:

the cover plate is used for providing an input interface for the touch or pressing of fingers;

the circuit board is arranged below the cover plate, the upper surface of the circuit board is provided with a touch electrode layer, and the touch electrode layer is used for sensing the touch position of a finger when the finger touches or presses the touch pad and outputting a corresponding touch induction signal;

the support is arranged below the circuit board, is used for supporting the circuit board, and comprises four extension parts which respectively extend from the central point of the support to four corners of the cover plate, and the tail ends of the extension parts are provided with cantilever beams;

the pressure sensor is arranged between the circuit board and the support and positioned on the cantilever beam, and is used for generating deformation when the pressing force generated when the finger touches or presses the touch pad is transmitted to the cantilever beam and outputting a corresponding pressure sensing signal;

the actuator is arranged on the lower surface of the circuit board, electrically connected with the touch controller and used for responding to the pressing force of the fingers and performing vibration feedback, and the bracket is provided with an avoiding hole used for accommodating the actuator;

17. The pressure touch device of claim 16, wherein a step is formed between the cantilever beam and the end of the extension, and wherein a fixing point for fixing the bracket is located at the end of the extension near the step.

18. The pressure touch device according to claim 16 or 17, wherein the cover plate is connected to the circuit board through any one of the following adhesive layers:

thermosetting adhesive, AB adhesive, moisture curing adhesive, hot melt adhesive film, double-sided Pressure Sensitive Adhesive (PSA), UV delayed curing adhesive and low-temperature single-component curing adhesive.

19. An electronic device, comprising:

a display; and the number of the first and second groups,

the touch panel according to any one of claims 1 to 15, the touch panel being configured to detect a touch position of a finger and a magnitude of a pressing force of the finger when the finger touches or presses, the display being configured to display an operation of the touch or pressing of the finger.