This disclosure relates to the technical field of pressure sensing, and more particularly, relates to a pressure sensing apparatus and electronic device.
At present, pressure sensing scheme for a track pad comprises pressure sensing feedback performed with a beam load cell, a piezoelectric pressure sensor and the like, in which the beam load cell is combined with a signal conditioning circuit and a microprocessor with a digital bus interface to form a beam load cell weighing system. The signal conditioning circuit is used for conditioning a signal output by the beam load cell, amplifying the output signal of the beam load cell and converting it into a digital signal, and then sending the digital signal to the microprocessor. Besides, when the beam load cell is used, one end of the load cell is secured and the other end is loaded with a to-be-tested product. Therefore, the beam load cell can only be installed with one end, which end is installed to the to-be-tested product, and it is inconvenient to assemble the beam load cell to the to-be-tested product, which is highly dependent on the structures, and the costs is too high for extensive use.
One objective of the embodiments of this disclosure is to provide a pressure sensing apparatus and electronic device, for solving the technical problems of existing beam load cells of high dependency on structures, inconvenience in assembly and high costs.
To solve the above technical problems, the embodiments of this disclosure provide the following technical solutions:
In a first aspect, a pressure sensing apparatus is provided, which includes:
In one embodiment, the pressure sensor is one of a plurality of pressure sensors, and the plurality of pressure sensors are electrically connected therebetween.
In one embodiment, the pressure sensor is provided with at least one channel.
In one embodiment, the solder pad is one of a plurality of solder pads, and the plurality of solder pads are spaced apart along an edge of the upper surface.
In one embodiment, the solder pad is welded to the panel through surface mounting.
In one embodiment, a shape of a cross-section of the substrate is any one of a rectangle, a triangle or a cross shape.
In one embodiment, the substrate is a flexible circuit board, an aluminum substrate, a ceramic substrate, or an FR-4 circuit board.
In a second aspect, an electronic device is provided, which includes a panel and the pressure sensing apparatus according to any one of the above embodiments, where the solder pad of the pressure sensing apparatus is welded to the panel, and the solder pad is electrically connected to the electronic device.
In one embodiment, the electronic device further includes a base, which is connected to the support of the pressure sensing apparatus.
In one embodiment, the panel is a touch pad or a touch screen.
The beneficial effects of the pressure sensing apparatus provided by the embodiments of this disclosure are as follows: as compared with existing art, the pressure sensing apparatus of this disclosure, with an arrangement where a pressure sensor is disposed on a substrate, a solder pad is disposed on the substrate, the solder pad is welded to a panel of an electronic device, a support supports the substrate such that the pressure sensor is directly mounted beneath the panel, and the mounting structure of the solder pad enables the entire pressure sensing apparatus to be directly installed to the to-be-tested panel, avoids the problem that the installation of a beam load cell is highly dependent on structures because the load cell can only have one of its ends installed to a to-be-tested product, and the generality of the pressure sensing apparatus is improved. In addition, since the traditional beam load cells need to be customized according to different customers, the costs are high, while the pressure sensing apparatus of this disclosure is a standard product, which can be compatible with different customers use requirements, and therefore the manufacturing costs of the product are reduced and the product costs are low.
The reference numerals involved in the above-mentioned drawings are as follows:
In order to make the technical problems, technical solutions and advantages of this disclosure clearer, this disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit this disclosure.
It should be noted that when an element is referred to as being “fixed at” or “provided in” another element, it may be on the other element directly or indirectly. When an element is referred to as being “coupled to” to another element, it may be connected to the other element directly or indirectly.
It should be understood that an orientation or positional relationship indicated by the terms “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside” and the like is an orientation or positional relationship shown in the drawings, and is merely for the convenience of describing this disclosure and simplifying the description, rather than indicating or implying that the device or elements referred to have a particular orientation, and are configured and operated along a particular orientation. Thus, it cannot be construed as limiting this disclosure.
In addition, terms “first” and “second” are only adopted for description and should not be understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, a feature defined by “first” and “second” may explicitly or implicitly indicate inclusion of one or more of such features. In the description of this disclosure, “a plurality of” means two or more, unless otherwise limited definitely and specifically.
In order to illustrate the technical solutions of this disclosure, the following detailed description is made with reference to the specific accompanying drawings and embodiments.
As shown in
The pressure sensing apparatus 100 provided in this embodiment, with an arrangement where the pressure sensor 20 is disposed on the substrate 10, the solder pad 30 is disposed on the substrate 10, the solder pad 30 is welded to the panel 201 of the electronic device 200, the support 40 supports the substrate 10 such that the pressure sensor 20 is directly mounted beneath the panel 201, and the mounting structure of the solder pad 30 enables the entire pressure sensing apparatus 100 to be directly installed to the to-be-tested panel 201, avoids the problem that the installation of a beam load cell is highly dependent on structures because the load cell can only have one of its ends installed to a to-be-tested product. In addition, with the pressure sensor 20 being mounted on the substrate 10 and with the solder pad 30 being welded to the panel 201 of the electronic device 200, all the pressures, when applied to the panel 201 during use, will fully act on the pressure sensing apparatus 100, thereby the measurement sensitivity is improved. In addition, since the traditional beam load cells need to be customized according to different customers, the costs are high, while the pressure sensing apparatus 100 of this disclosure is a standard product, which can be compatible with different customers use requirements, and the costs are low.
In some embodiments of this disclosure, optionally, as shown in
In this embodiment, a plurality of pressure sensors 20 may be provided. The plurality of pressure sensors 20 are disposed on the upper surface 11 of the substrate 10, or the plurality of pressure sensors 20 are disposed on the lower surface 12 of the substrate 10, or the plurality of pressure sensors 20 may be disposed both on the upper surface 11 and on the lower surface 12 of the substrate 10, so as to improve the measurement sensitivity of the pressure sensing apparatus 100 during the measurements. Alternatively, one pressure sensor 20 may be disposed on the upper surface 11 of the substrate 10, or one pressure sensor 20 may be disposed on the lower surface 12 of the substrate 10, depending on the requirement of the to-be-tested electronic device 200.
It should be noted that, in addition to a non-destruction testing (NDT) micro-pressure strain sensor, the pressure sensor 20 may be this structure of other pressure sensitive materials such as metal wire strain gauge, silicon wafer strain gauge, polycrystalline or amorphous semiconductor, copper-nickel alloy, carbon nanotube, graphene, piezoelectric ceramic, and conductor-insulator composite material, etc. The pressure sensors 20 may be electrically connected therebetween with all conductive materials such as Cu (copper), Ag (silver), carbon paste, and etc.
In some embodiments of this disclosure, optionally, as shown in
In this embodiment, the channel of the pressure sensors 20 may be configured with a single-channel signal transmission mode as shown in
In some embodiments of this disclosure, optionally, as shown in
In this embodiment, a plurality of solder pads 30 may be provided. For example, the cross-section of the substrate 10 is rectangular, that is, the substrate 10 is a cube. Four solder pads 30 are provided, where two solder pads 30 of the four solder pads 30 are disposed at the left side of the upper surface 11 of the substrate 10, and the other two solder pads 30 are disposed at the right side of the upper surface 11 of the substrate 10, such that the connection between the panel 201 and the pressure sensing apparatus 100 is more solid when the solder pads 30 are welded to the panel 201 of the electronic device 200. Besides, when the panel 201 is touched, the solder pads 30 may bear the force signals and transmit the electronic signals through the welding points with the panel 201. Optionally, the solder pads 30 are welded to the panel 201 by means of SMT process.
In the foregoing embodiments of this disclosure, optionally, the solder pads 30 may be welded to the panel 201 through surface mounting. By using surface mounting technology, the solder pads 30 can be welded to the panel 201 through surface mounting, so as to secure the pressure sensing apparatus 100 on the panel 201 of the electronic device 200.
In some embodiments of this disclosure, optionally, as shown in
In this embodiment, the shape of the substrate 10 may be configured to be any one of a rectangle, a triangle, or a cross shape. Of course, the substrate 10 may also be in other shapes. As shown in
In some embodiments of this disclosure, optionally, the substrate 10 is a flexible circuit board, an aluminum substrate, a ceramic substrate, or an FR-4 circuit board.
In this embodiment, the substrate 10 may be selected from a flexible circuit board, an aluminum substrate, a ceramic substrate, or an FR-4 circuit board. Specifically, the substrate 10 is made of a metal circuit board, such as an aluminum substrate, or made of materials such as plastic, ceramic, and sheet glass.
As shown in
Specifically, the solder pad(s) 30 of the pressure sensing device 100 is welded to the panel 201 through SMT process, and the solder pad(s) 30 simultaneously bears a force signal and transmits an electrical signal. In addition, a plurality of pressure sensing apparatuses 100 may be welded on the panel 201 via the solder pads 30 through SMT process.
As shown in
It should be noted that, the electronic device 200 may be a track pad, or may be an electronic display screen, or may be a smartphone or the like, and the panel 201 may be a touch pad or a touch screen.
In some embodiments of this disclosure, optionally, the electronic device 200 further includes a base 202, which is connected to a support 40 of the pressure sensing apparatus 100, as shown in
In this embodiment, the solder pads 30 of the pressure sensing apparatus 100 is welded to the panel 201 through surface mounting technology, and then the support 40 is connected to the base 202, thereby the pressure sensing apparatus 100 is installed on the electronic device 200. The support 40 may be a connector made of flexible material, and may also be a connector made of rigid material, for example, a nut welded to the lower surface 12 of the substrate 10 through SMT process, or may be directly connected to the base 202 by means of glue, VHB (Very High Bond) polyacrylate double-sided foam tape, double-sided adhesive, various adhesive dispenses.
The pressure sensing apparatus 100 provided in this disclosure may be applied to a to-be-tested product, which may be an electronic device 200, with the following operations:
disposing the pressure sensor(s) 20 on the upper surface 11 and/or the lower surface 12 of the substrate 10 to form the detection circuit, and connecting the solder pad(s) 30 on the upper surface 11 of the substrate 10 such that the solder pad(s) 30 is welded to the panel 201 of the electronic device 200, and then connecting the support 40 with the base 202 of the electronic device 200, where one or more pressure sensing apparatuses 100 may be arranged between the panel 201 and the base 202, and all the pressures, when applied to the panel 201 during use, will fully act on the pressure sensing apparatus 100, thereby the measurement sensitivity is improved.
In summary, when implemented, the pressure sensing apparatus provided in the embodiments has at least the following beneficial technical effects over existing art: the pressure sensing apparatus, with an arrangement where a pressure sensor is disposed on a substrate, a solder pad is disposed on the substrate, the solder pad is welded to a panel of an electronic device, a support supports the substrate such that the pressure sensor is directly mounted beneath the panel, and the mounting structure of the solder pad enables the entire pressure sensing apparatus to be directly installed to the to-be-tested panel, avoids the problem that the installation of a beam load cell is highly dependent on structures because the load cell can only have one of its ends installed to a to-be-tested product. Besides, all the pressures, when applied to the panel, will fully act on the pressure sensing apparatus, thereby the measurement sensitivity is improved.
The above are merely alternative embodiments of this disclosure, and are not intended to limit this disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this disclosure should be included within the protection scope of this disclosure.
Filing Document | Filing Date | Country | Kind |
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PCT/CN2020/113537 | 9/4/2020 | WO |