CN210157242U

CN210157242U - Shell and mobile terminal

Info

Publication number: CN210157242U
Application number: CN201922421988.XU
Authority: CN
Inventors: 黄俊华; 张志义
Original assignee: Chipsea Technologies Shenzhen Co Ltd
Current assignee: Chipsea Technologies Shenzhen Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-03-17
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a casing and mobile terminal, including the casing body, this internal pressure sensor, analog-to-digital conversion device, digital signal processing device and communication circuit of being provided with of casing, pressure sensor and digital signal processing device are connected with the analog-to-digital conversion device respectively, and the digital signal processing device is connected with communication circuit, and communication circuit is wired interface communication circuit or wireless communication circuit for connection terminal predetermines interface or wireless signal receiving port. The utility model discloses casing, integrated pressure sensor in the casing, when the protective sheath received external pressure, pressure sensor acquireed pressure signal, with pressure signal transmission to terminal system for terminal system can acquire the deformation information that external pressure produced the casing in real time, makes the terminal product that does not have forced induction have the forced induction function.

Description

Shell and mobile terminal

Technical Field

The utility model relates to the technical field of the casing, especially, relate to a casing and mobile terminal.

Background

With the continuous development of mobile terminal technology, a terminal product can sense operation information of a user for the terminal product or change information of an external environment where the terminal product is located through various modes such as sound, fingerprints, images and sliding, so that a terminal system can trigger corresponding application functions according to the operation information or the change information, the higher the sensing capability of the terminal product is, the richer the functions are, currently, terminal manufacturers have developed terminal products with pressure sensing operation functions successively, human-computer interaction modes can be enriched by adding pressure sensing keys or other pressure sensing operations, and the longer the service life of the pressure sensing keys is compared with that of common keys.

However, in the existing terminal products with the pressure sensing function, the pressure sensor is generally attached or otherwise fixed inside the terminal products such as mobile phones and tablets, external pressure information is obtained by identifying micro-deformation on the surface portion of the terminal product, and when the pressure sensor is damaged, the terminal needs to be disassembled, so that the cost of maintenance or replacement is high, the process steps are complicated, and specific installation equipment needs to be adopted.

In order to enable the terminal product to have the pressure sensing function and better control the production cost, the existing terminal product with the pressure sensing function needs to be optimized.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a housing and a mobile terminal to solve the problem that the existing terminal product with pressure sensing function has complex process and high cost.

The utility model solves the technical problems that the technical scheme adopted is as follows:

according to the utility model discloses a first aspect provides a pair of casing, including the casing body this internal pressure sensor, analog-to-digital conversion device, digital signal processing device and the communication circuit of being provided with of casing, pressure sensor with digital signal processing device respectively with the analog-to-digital conversion device is connected, digital signal processing device with communication circuit connects, communication circuit is wired interface communication circuit or wireless communication circuit for connection terminal's interface or wireless signal reception port predetermine.

According to a second aspect of the present invention, a mobile terminal is provided, which comprises the above casing.

The embodiment of the utility model provides a casing and mobile terminal, integrated pressure sensor in the casing, when the protective sheath received external pressure, pressure sensor acquireed pressure signal, transmitted pressure signal to the terminal system for the terminal system can acquire the deformation information that external pressure produced the casing in real time, makes the terminal product that does not have forced induction have the forced induction function. Compared with the method that the pressure sensor is attached or fixed inside the terminal product in other modes, the shell with the pressure sensing function is low in development cost, lower in requirements for materials on the surface of the terminal product of the mobile phone/tablet, capable of guaranteeing the anti-falling effect of the terminal product of the mobile phone/tablet and the like, and low in later-stage maintenance or replacement cost.

Drawings

Fig. 1 is a schematic block diagram of a housing structure according to an embodiment of the present invention.

Fig. 2 is a schematic block diagram of another housing structure according to an embodiment of the present invention.

Fig. 3 is a schematic three-dimensional structure diagram of a housing and a mobile terminal according to an embodiment of the present invention.

Fig. 4 is a schematic structural block diagram of another housing according to an embodiment of the present invention.

Fig. 5 is a schematic three-dimensional structure diagram of another housing and a mobile terminal according to an embodiment of the present invention.

Fig. 6 is a schematic diagram illustrating a principle of a strain gauge pressure sensor according to an embodiment of the present invention.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention clearer and more obvious, the following description of the present invention with reference to the accompanying drawings and embodiments is provided for further details. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The terminal may be implemented in various forms. For example, the terminal described in the present invention may include terminals such as a set-top box, a mobile terminal, a smart phone, a notebook computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a navigation device, and the like, and fixed terminals such as a digital TV, a desktop computer, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly for moving purposes.

In an embodiment, as shown in fig. 1, an embodiment of the present invention provides a housing, including a housing body 10, a pressure sensor 101, an analog-to-digital conversion device 102, a digital signal processing device 103 and a communication circuit 104 are disposed in the housing body 10, the pressure sensor 101 and the digital signal processing device 103 are respectively connected to the analog-to-digital conversion device 102, the digital signal processing device 103 is connected to the communication circuit 104, and the communication circuit 104 is a wired interface communication circuit or a wireless communication circuit, and is used for connecting a preset interface or a wireless signal receiving port of a terminal.

The pressure sensor 101 deforms when the housing is subjected to a force, and generates an electrical signal according to the deformation, the electrical signal is an analog signal, the analog-to-digital conversion device 102 is used for converting the electrical signal in the analog signal state into a deformed digital signal, the digital signal processing device 103 is used for processing the deformed digital signal to obtain a pressure value applied to the housing by external pressure, and the communication circuit 104 is used for being connected with a terminal according to the pressure value output by the digital signal processing device 103. The connection between the communication circuit 104 and the terminal may be a wired connection or a wireless connection, and may be used for data transmission or power transmission (such as charging), which is not limited in this application.

Alternatively, the communication circuit 104 may be a wired interface communication circuit, for example implemented with some interfaces and interface circuits; alternatively, the communication circuit may be a wireless communication circuit, for example, implemented by a WiFi communication circuit, a bluetooth communication circuit, a ZigBee communication circuit, an NFC communication circuit, or the like; alternatively, the communication circuit 104 includes at least one wired interface communication circuit and at least one wireless communication circuit. The implementation of the communication circuit 104 is not limited in this application.

In the embodiment, under the action of the dead weight of a terminal product or external pressure, a pressure sensor 101 in a shell body 10 converts the deformation of the pressure sensor into a change value of an analog signal and transmits the change value to an analog-to-digital conversion device 102, a digital signal processing device 103 processes the converted change value of the digital signal, judges the pressure value borne by the surface of the current terminal product, then performs data processing by combining with the existing related algorithm, and transmits the pressure value or information obtained by converting the pressure value to a terminal system through a communication circuit 104; therefore, the shell and the terminal using the shell have a pressure sensing function, pressure control of the terminal can be achieved without changing a hardware structure in the terminal, cost is controllable, and practicability is high. When the pressure sensing function breaks down, the shell can be replaced without disassembling the terminal, so that the maintenance cost or the replacement cost can be effectively reduced.

Optionally, in some embodiments, one or more pressure sensors 101 are disposed in the housing body 10, and each pressure sensor 101 is connected to the analog-to-digital conversion device 102 through a circuit board. For example, each pressure sensor 101 is connected to an analog-to-digital conversion device 102 through a wire on a circuit board. Here, the pressure sensor 101 may be disposed at any position of the housing body 10. For example, as an embodiment, the housing body 10 includes a bottom wall and a plurality of side walls respectively connected to the bottom wall, and the pressure sensor 101 may be disposed on the bottom wall of the housing body 10, where the bottom wall is deformed when the housing body 10 is subjected to an external pressure, and the pressure sensor 101 is stretched or compressed along with the deformation, so as to generate the sensing signal. The pressure sensor 101 may be disposed on a peripheral side wall of the housing body 10, and when the housing body 10 is held, an external pressure is generally transmitted from the peripheral side wall to the middle of the housing body 10, so that the pressure sensor 101 is pressed on the peripheral side wall, thereby generating a sensing signal. The pressure sensors 101 may also be disposed at the bottom and the peripheral side wall of the housing body 10 to obtain sensing signals. The pressure sensor 101 can be mounted on the housing body 10 by various methods such as adhesion or embedding, and when the pressure sensor 101 is in a thin film form, adhesion or embedding can be adopted; when the pressure sensor 101 is a small three-dimensional block like MEMS (micro electro mechanical Systems), a damascene method may be adopted to avoid affecting the appearance and stability of the housing body 10.

Each of the pressure sensors 101 is connected to the analog-to-digital conversion device 102 through a circuit board. The pressure sensors 101 may be plural, and the pressure sensors 101 are distributed at four corners and the center of the bottom in the housing body 10, so that the sensing signals generated at the four corners and the center of the bottom can be obtained. The pressure sensors 101 may be disposed at the middle positions of the peripheral side walls of the housing body 10, and may generate a sensing signal regardless of which side wall an external pressure is applied. The pressure sensors 101 are arranged on the bottom and the side wall in a mutually perpendicular mode, so that sensing signals in the plane transverse direction and the plane longitudinal direction can be acquired. Preferably, the pressure sensors 101 are evenly distributed at the bottom and the side walls. The circuit board is preferably a flexible circuit board.

In the present embodiment, by using the plurality of pressure sensors 101, the pressure sensors 101 are distributed at a plurality of positions of the housing body 10, so as to sense external pressures applied to the housing body 10 in different directions, and obtain accurate sensing signals, and in addition, by using the plurality of pressure sensors 101, directional parameters of the external pressures are further obtained, and the accuracy of the pressure values is improved by using the sensing signals of the plurality of pressure sensors 101.

Alternatively, in some embodiments, the pressure sensor 101 is a piezoelectric film sensor, a strain gauge pressure sensor, a ceramic pressure sensor, or the like, and is not limited to the above.

Specifically, a piezoelectric film sensor is a flexible element that when bent generates high strain in the film, and therefore a high voltage output. When the device is bent due to direct contact, it is a flexible switch, and the output generated is sufficient to directly drive a MOSFET or CMOS circuit. When the housing body 10 is subjected to external pressure, the piezoelectric film sensor attached to the housing body 10 is elastically deformed, and the piezoelectric film sensor is bent to generate a sensing signal.

Specifically, the strain gauge in the strain gauge pressure sensor utilizes the principle that the resistance of many metals changes when the metals are mechanically stretched or shortened. As shown in fig. 6, the housing body 10 elastically deforms when receiving external pressure, and since the strain gauge is integrally disposed in the housing body 10, the strain gauge deforms along with the housing body 10, and the strain gauge extends or shortens along with the housing body 10, so that the resistance value of the strain gauge changes, and thus the voltage applied to the strain gauge changes, and the resistance value variation of the strain gauge can be obtained by measuring the voltage variation value, and the variation of the resistance value is proportional to the external pressure, so that the pressure value can be measured through the strain gauge. In addition, the resistance change of the strain gauge when the strain gauge is stressed is usually small, and the strain gauge is generally combined into a strain bridge, amplified by a subsequent amplifier and then transmitted to the analog-to-digital conversion device 102.

The pressure of the ceramic pressure sensor directly acts on the front surface of the ceramic diaphragm to make the diaphragm generate tiny deformation, the thick film resistor is printed on the back surface of the ceramic diaphragm to be connected into a Wheatstone bridge, and the bridge generates a voltage signal which is in direct proportion to the pressure, highly linear and in direct proportion to the excitation voltage due to the piezoresistive effect of the pressure sensitive resistor, so that the pressure can be measured according to the voltage signal.

The preferred piezoelectric film sensor, foil gage pressure sensor that adopt of this embodiment because casing body 10's installation space is limited, adopts the sensor structure of diaphragm formula, is convenient for paste, inlay mode such as install on casing body 10, avoids influencing casing body 10's structural morphology because the volume of sensor.

Alternatively, the communication circuit 104 may be physically or wirelessly connected for communication with the terminal. For example, the communication circuit 104 may include a physical interface through which a physical connection is made with a terminal. Alternatively, the communication circuit may include a wireless transmission device through which wireless communication connection is made with the terminal.

In some embodiments, the communication circuit 104 is a wired interface communication circuit, the wired interface communication circuit includes a communication connector 105, the communication connector 105 is connected to the digital signal processing device 103, for example, the communication connector 105 is connected to the digital signal processing device 103 through a wire on a circuit board, and the communication connector 105 is connected to a predetermined interface of a terminal. Optionally, the communication connector 105 is a Universal Serial Bus (USB) connector or a headset connector. The USB connector is used for connecting a USB interface of the terminal, and the earphone hole connector is used for connecting an earphone interface of the terminal. Alternatively, the USB connector may be a USB Type A (Type-A) connector, a USB Type B (Type-B) connector, or a USB Type-C connector. After the communication connector 105 is connected with the interface corresponding to the terminal, the output signal of the digital signal processing device, i.e., the acquired pressure value, can be transmitted to the terminal system, so that the terminal performs corresponding pressure touch operation according to the pressure value. In addition, the communication connector 105, such as a USB port, can also supply power to the internal circuit of the housing through the terminal, and at this time, it is not necessary to provide an energy storage element in the housing body 10, which can reduce the overall cost, save the space in the housing body, and make the definition of the position of the pressure sensor 101 have a more flexible allocation space.

It is understood that, in the case of charging the device in the housing body 10 by using the communication connector 105, an energy storage element such as a battery, a capacitor or an inductor may be provided in the housing body 10 at the same time, as required.

Optionally, the communication circuit 104 may further include a switching interface connected to the communication connector 105, where the switching interface is used to connect an external adapter, so that the adapter and the communication connector 105 can be connected to each other, so that the adapter can supply power to a terminal using the housing, and the adapter can also be used to supply power to circuits such as a pressure sensor, an analog-to-digital conversion device, a digital signal processing device, and a communication circuit in the housing.

In some embodiments, as shown in fig. 4, the communication circuit 104 is a wireless communication circuit, the wireless communication circuit includes a wireless transmission device 106, the wireless transmission device 106 is connected to the digital signal processing device 103, and the wireless transmission device 106 is connected to a wireless signal receiving port of the terminal. The wireless transmission device 106 includes any one or more of a bluetooth communication device, a WiFi communication device, a ZigBee communication device, and an NFC communication device. The wireless communication device 106 adopts a low-power short-range communication protocol, which may be a hyper link protocol, a WiFi/IEEE 802.11 protocol, a Mesh/IEEE802.11s protocol, a bluetooth/IEEE 802.15.1 protocol, a ZigBee/802.15.4 protocol, a Thread/IEEE 802.15.4 protocol, a Z-Wave protocol, etc.

In some embodiments, as shown in fig. 5, the housing body 10 further includes a battery 107, and the battery 107 is connected to the analog-to-digital conversion device 102, the digital signal processing device 103 and the wireless transmission device 106 to supply power to these devices.

Optionally, as shown in fig. 2 and 4, an expansion device 108 may be further integrated in the housing body 10, and the expansion device 108 may be used to collect some other sensing signals, such as temperature, illuminance, human impedance, and the like, so that the housing body 10 has a richer sensing function. The expansion device 108 may be a protocol storage device; for example, the protocol of the wireless mouse or the wireless keyboard is communicated with the terminal system, any charging or earphone interface of the terminal product is not required to be occupied, and the wireless mouse or the wireless keyboard can be adapted to multiple types of terminal products simultaneously.

The housing of the present invention will be described below with reference to specific examples.

In an embodiment, as shown in fig. 4, taking the case as an example of transmitting data with a terminal in a wireless manner and supplying power by a battery, an embodiment of the present invention provides a case, including a case body 10, a pressure sensor 101, an analog-to-digital conversion device 102, a digital signal processing device 103, a wireless transmission device 106 and a battery 107 are disposed in the case body 10, wherein the pressure sensor 101 is connected with the analog-to-digital conversion device 102, and the analog-to-digital conversion device 102 is connected with the digital signal processing device 103; the wireless transmission device 106 is connected to the digital signal processing device 103, and the wireless transmission device 106 is further used for connecting a wireless signal receiving port of a terminal.

The battery 107 supplies an operating voltage to the analog-to-digital conversion device 102, the digital signal processing device 103, and the wireless transmission device 106.

Under the effect of the dead weight of the terminal product or external pressure, the strain gauge in the housing body 10 converts the deformation value of the strain gauge into a change value of an analog signal and transmits the change value to the analog-to-digital conversion device 102, the digital signal processing device 103 processes the converted change value of the digital signal, judges the pressure value of the current terminal product surface, and then combines a related algorithm and a data processing algorithm to transmit the pressure value or information obtained by converting the pressure value to a terminal system through the wireless transmission device 106.

The power supply devices such as the battery 107 are integrated in the housing body 10 of the embodiment, pressure-sensitive signals in the housings such as the mobile phone and the tablet are transmitted to the terminal system in a Bluetooth or WIFI or other wireless transmission modes, and the terminal system does not need to occupy a terminal interface and works independently. The pressure sensing function can be added to the existing mobile phone/tablet machine type by using the shell.

In particular, the housing is a terminal housing or a terminal protective sleeve sleeved on the terminal housing.

In one embodiment, as shown in fig. 3 and 5, an embodiment of the present invention provides a mobile terminal 20, where the mobile terminal 20 includes the housing 10 of any of the above embodiments. The information generated by the deformation of the housing 10 and converted from the pressure value is transmitted to the terminal system through the terminal interface or the wireless transmission mode.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, without thereby limiting the scope of the invention. Any modification, equivalent replacement and improvement made by those skilled in the art without departing from the scope and spirit of the present invention should be within the scope of the claims of the present invention.

Claims

1. A shell is characterized by comprising a shell body, wherein a pressure sensor, an analog-to-digital conversion device, a digital signal processing device and a communication circuit are arranged in the shell body, the pressure sensor and the digital signal processing device are respectively connected with the analog-to-digital conversion device, the digital signal processing device is connected with the communication circuit, and the communication circuit is a wired interface communication circuit or a wireless communication circuit and is used for connecting a preset interface or a wireless signal receiving port of a terminal.

2. The housing of claim 1, wherein a plurality of the pressure sensors are disposed in the housing body, and each of the pressure sensors is connected to the analog-to-digital conversion device through a circuit board.

3. The housing of claim 2, wherein the pressure sensor is a diaphragm pressure sensor.

4. The housing of claim 1, wherein the communication circuit is a wired interface communication circuit, the wired interface communication circuit includes a communication connector, the communication connector is connected to the digital signal processing device, and the communication connector is connected to a predetermined interface of the terminal.

5. The housing of claim 4, wherein the communication connector is a universal serial bus connector or a headset connector.

6. The housing of claim 1, wherein the communication circuit is a wireless communication circuit, the wireless communication circuit comprises a wireless transmission device, the wireless transmission device is connected with the digital signal processing device, and the wireless transmission device is connected with a wireless signal receiving port of the terminal.

7. The housing of claim 6, further comprising a battery within the housing body, the battery being connected to the analog-to-digital conversion device, the digital signal processing device, and the wireless transmission device.

8. The housing according to any of claims 1 to 7, characterized in that the housing is a housing of the terminal.

9. The housing according to any of claims 1 to 7, wherein the housing is configured to fit over a housing of the terminal.

10. A mobile terminal characterized by comprising a housing according to any of claims 1 to 8.