CN210405431U

CN210405431U - Key structure and mobile terminal

Info

Publication number: CN210405431U
Application number: CN202020366398.1U
Authority: CN
Inventors: 聂操
Original assignee: Chipsea Technologies Shenzhen Co Ltd
Current assignee: Chipsea Technologies Shenzhen Co Ltd
Priority date: 2020-03-22
Filing date: 2020-03-22
Publication date: 2020-04-24
Anticipated expiration: 2030-03-22

Abstract

The utility model discloses a button structure, button structure includes: the substrate is provided with at least one sensing area, and the thickness of the substrate in the sensing area is smaller than that of the substrate in the non-sensing area; a circuit board mounted within the sensing region; at least one sensor, the at least one sensor sets up in the circuit board near the one side of base plate and/or keep away from the one side of base plate. The utility model discloses still disclose a mobile terminal. The utility model discloses a button structure has the effect of preventing the mistake and touching.

Description

Key structure and mobile terminal

Technical Field

The utility model relates to a mobile terminal, pressure touch technical field especially relate to a button structure and mobile terminal.

Background

The keys of the mobile terminal (such as a mobile phone) mainly include traditional mechanical structure keys, ultrasonic keys, pressure touch keys and the like. Traditional mechanical keys need to be provided with holes on the mobile phone, so that the attractiveness of the mobile phone is affected. The ultrasonic key scheme is not only high in cost, but also high in power consumption of the mobile phone. The pressure touch key scheme has the advantages of low cost, sensitive response and the like.

However, when the pressure touch is used to realize the side key function, the problem of error touch is easy to occur, for example: the signal quantity received by the pressure sensor due to the extrusion of the mobile phone is similar to that received by normal pressing operation, and if a user accidentally extrudes the mobile phone, twists the mobile phone and the like, the false touch problem is urgently solved.

Disclosure of Invention

An object of the utility model is to overcome the not enough of above-mentioned prior art and provide a button structure, this button structure has the effect of preventing the mistake and touching.

In order to realize the utility model discloses a purpose, the utility model provides a button structure, button structure includes:

the substrate is provided with at least one sensing area, and the thickness of the substrate in the sensing area is smaller than that of the substrate in the non-sensing area;

a circuit board mounted within the sensing region;

at least one sensor, the at least one sensor sets up in the circuit board near the one side of base plate and/or keep away from the one side of base plate.

Optionally, the non-sensing region of the substrate has a support portion such that a thickness of the non-sensing region is greater than a thickness of the sensing region.

Optionally, two ends of each sensing region in the length direction are the non-sensing regions, and at least one supporting portion is disposed at a boundary between each non-sensing region and the sensing region.

Optionally, the supporting portion is disposed on a side of the substrate facing the circuit board, or the supporting portion is disposed on a side of the substrate away from the circuit board.

Optionally, the key structure further comprises a reinforcing sheet; the reinforcing sheet is arranged in the sensing area and is positioned between the substrate and the circuit board; or the reinforcing sheet is arranged on one side of the circuit board far away from the substrate, and the installation position of the reinforcing sheet is opposite to the sensing area.

Optionally, at least one side of the reinforcing sheet is provided with a plurality of grooves, and one or more sensors are arranged in at least one groove.

Optionally, the grooves are aligned along the length of the reinforcing sheet.

Optionally, the reinforcing sheet is a steel sheet.

In order to realize the second objective of the present invention, the present invention further provides a mobile terminal, which comprises at least one key structure as described above.

Optionally, the substrate is a housing of the mobile terminal or a middle frame of the mobile terminal.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a button structure can be used for realizing mobile terminal's side button. Because the utility model discloses a button structure has contained sensing area territory and non-sensing area territory, when the side button by normally pressing, by the improper time of pressing (for example extrusion mobile terminal etc.), the received signal quantity of pressure sensor has apparent difference under these two kinds of circumstances. Therefore, the utility model discloses a button structure can distinguish user's normal pressing operation and the abnormal pressing operation, the utility model discloses a button structure has good mistake of preventing and touches the effect.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic cross-sectional view of a key structure according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of a key structure according to another embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a key structure according to another embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a key structure according to another embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view of a substrate in a key structure according to an embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view of a key structure according to still another embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view of a key structure according to still another embodiment of the present invention.

Fig. 8 is a schematic cross-sectional view of a key structure according to still another embodiment of the present invention.

Fig. 9 is a schematic cross-sectional view of a substrate in a key structure according to another embodiment of the present invention.

Fig. 10 is a schematic cross-sectional view of a mobile terminal according to an embodiment of the present invention.

Fig. 11 is a partially enlarged schematic view of the region a of fig. 10.

Reference numerals:

a key structure 10; a substrate 101; a sensing region 102; a non-sensing region 103; a support portion 1031;

a circuit board 20;

a reinforcing sheet 30; a groove 301;

a sensor 40.

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

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the following description, suffixes such as "module", "part", or "unit" used to denote elements are used only for the convenience of description of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

The terminal of the present invention may be implemented in various forms. For example, the terminal described in the present invention may include mobile terminals such as a mobile phone, a tablet computer, a notebook computer, a palm top computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and fixed terminals such as a digital TV, a desktop computer, and the like.

The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiments of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.

Referring to fig. 1, in an embodiment, the present invention provides a key structure 10, the key structure 10 includes a substrate 101, a circuit board 20 and at least one sensor 40 disposed on the circuit board, wherein one or more sensing regions 102 are disposed on the substrate 101, and a thickness of the substrate in the sensing region 102 is smaller than a thickness of the substrate in the non-sensing region 103, that is, a thickness of the sensing region 102 in the substrate 101 is smaller than a thickness of the non-sensing region 103; the circuit board 20 and the at least one sensor 40 are mounted within the sensing region 102.

Alternatively, the sensor 40 may be a pressure sensor, a capacitive touch sensor, or a pressure-capacitance composite sensor. When a pressure sensor is used, the key structure 10 can be applied to a pressure-sensitive key to realize a pressure control function. When a capacitive touch sensor is used, the key structure 10 can be applied to a touch key to realize a touch control function. When the pressure-capacitance composite sensor 40 is used, the key structure 10 can be applied to a pressure touch key to realize a composite control function of combining pressure and touch.

Taking the pressure sensor as an example, the pressure sensor may be a thin film pressure sensor or a MEMS (Micro-Electro-Mechanical System), and the pressure sensing material may be a piezoresistive material or a piezoelectric material.

Further, the circuit board 20 may be a printed circuit board 20 or a flexible circuit board 20, preferably the flexible circuit board 20. The Flexible Printed Circuit board 20 (FPC) is a highly reliable and excellent Flexible Printed Circuit board 20 made of a polyimide or polyester film as a base material. The high-density light-weight LED lamp has the characteristics of high wiring density, light weight, thin thickness and good bending property.

Alternatively, the at least one sensor 40 may be disposed on a side of the circuit board 20 close to the substrate 101, and may also be disposed on a side of the circuit board 20 away from the substrate 101.

The number of the sensors 40 may be one or more. When the number of the sensors 40 is plural, all the sensors 40 are disposed on the side of the circuit board 20 close to the substrate 101; alternatively, all the sensors 40 are disposed on the side of the circuit board 20 away from the substrate 101; alternatively, a part of the sensor 40 is disposed on the circuit board 20 on a side close to the substrate 101, and another part of the sensor 40 is disposed on the circuit board 20 on a side far from the substrate 101. That is, the plurality of sensors 40 may be disposed on the same side of the circuit board 20, or disposed on two opposite sides of the circuit board 20.

By arranging a plurality of sensors 40, the occurrence of misdetection can be reduced, and the accuracy and reliability of pressure measurement can be improved. The sensor 40 has various arrangement modes, the arrangement modes are flexible and various, and when the key structure is actually processed and manufactured, a proper setting position can be selected according to needs, so that the processing difficulty is reduced, and the processing cost is reduced.

In some embodiments, please refer to fig. 2 and 5. Further, the non-sensing region 103 of the substrate 101 has a support portion 1031, and the support portion 1031 makes the thickness of the non-sensing region 103 larger than that of the sensing region 102.

Alternatively, the supporting portion 1031 may be provided on the side of the substrate 101 facing the circuit board 20, and the supporting portion 1031 may also be provided on the side of the substrate 101 away from the circuit board 20.

By providing the support 1031, the mechanical strength of the non-sensing region 103 is made stronger than that of the sensing region 102. When the key structure 10 is pressed by a user, the sensing region 102 is easily deformed, so that the sensor 40 easily receives a signal amount, and the non-sensing region 103 is not easily deformed, so that the overall shape of the substrate 101 is kept stable.

In some embodiments, further, both ends of each sensing region 102 along the length direction are non-sensing regions 103, and at least one supporting portion 1031 is disposed in each non-sensing region 103 and at the boundary with the sensing region 102. In other words, a plurality of supporting portions 1031 are provided at intervals along the longitudinal direction of the substrate 101, a sensing region 102 is provided between every two adjacent supporting portions 1031, and the supporting portions 1031 are located in a non-sensing region 103.

In one embodiment, referring to fig. 2, the key structure further includes a reinforcing sheet 30. Alternatively, the reinforcing sheet 30 may be disposed toward the sensor 40, and may be disposed away from the sensor 40. The reinforcing sheet 30 may have a flat structure with a smooth surface, or may have a flat structure with one or more grooves 301. The reinforcing sheet 30 is provided for supporting the circuit board 20 and increasing the overall deformation of the sensing region, thereby reinforcing the received signal amount of the sensor 40.

In one embodiment, as shown in fig. 2-3, at least one side of the reinforcing sheet 30 is formed with a plurality of grooves 301, and at least one of the grooves 301 is formed with one or more sensors 40 therein. Alternatively, the number of sensors 40 in each recess 301 may be the same or different. For example, one sensor 40 may be disposed in each recess 301; alternatively, at least two sensors 40 are respectively arranged in each groove 301; alternatively, one sensor 40 is disposed in one partial groove 301, and at least two sensors 40 are disposed in the other partial groove 301. Fig. 2 illustrates one sensor 40 disposed in each groove 301, and fig. 3 illustrates two sensors 40 disposed in each groove 301.

In the present embodiment, the reinforcing sheet 30 is mounted on the side of the circuit board 20 away from the substrate 101, and the mounting position of the reinforcing sheet 30 is opposite to the sensing region 102. The sensor 40 is arranged between the circuit board 20 and the reinforcing sheet 30, a slot is arranged on one side of the circuit board 20 away from the substrate 101, and the sensor 40 is installed in the slot. Also, the reinforcing sheet 30 is provided with a groove 301 on a side thereof adjacent to the circuit board 20 for fittingly receiving the sensor 40. By arranging the slot on the circuit board 20 and the groove 301 on the reinforcing sheet 30, the sensor 40 can be better fixed, and the sensor 40 is prevented from shifting in the using process.

In other embodiments, the stiffener 30 may also be mounted within the sensing region 102 and between the substrate 101 and the circuit board 20. For example, the key structure 10 in fig. 4 is provided with the reinforcing sheet 30 and the circuit board 20 with the sensor 40 in sequence in a direction away from the substrate 101 in the sensing region 102, i.e., the reinforcing sheet 30 is disposed between the substrate 101 and the circuit board 20.

As an embodiment, in order to increase the number of the grooves 301, the grooves 301 may be arranged along the length direction of the reinforcing sheet 30. Specifically, the reinforcing sheet 30 may be arranged in a linear or array shape along the length direction thereof.

In one embodiment, the reinforcing sheet 30 is a thin metal sheet, such as a steel sheet. Due to the fact that the metal sheet is arranged, when the side key is pressed normally, the signal quantity received by the sensor is stronger, so that the normal pressing and the abnormal pressing can be distinguished more easily, and identification of normal pressing events of the side key is facilitated. In particular, because the metal sheet has certain rigidity and toughness, the metal sheet can be bent when the metal sheet is subjected to a force in a direction perpendicular to the surface of the metal sheet. When the two ends of the metal sheet are fixed and the middle of the metal sheet is pressed, a user applies small pressure to enable the middle of the metal sheet to generate large deformation along the pressure direction, and then the pressure sensor arranged close to the middle of the metal sheet obtains large deformation or stress, so that the output signal quantity of the pressure sensor is enhanced. And the lateral acting force is difficult to cause the metal sheet to twist, and the metal sheet plays the role of fixing the pressure sensor instead at the moment, so that the metal sheet is difficult to deform. When the mobile phone is pressed or squeezed abnormally, even if the acting force acting on the middle frame of the mobile phone is not small, the acting force capable of being transmitted to the pressure sensor is limited, and the signal quantity received by the pressure sensor can not change obviously. Therefore, the metal sheet can reduce the signal quantity of the pressure sensor during abnormal stress, and the false touch prevention effect is further improved. In addition, the body is thinner and easy to break, and the metal sheet can enhance the structural strength and avoid breakage.

The present embodiment enhances the amount of signals received by the sensor 40 by providing the reinforcing sheet 30 for supporting the circuit board 20 and increasing the overall deformation. By providing the support 1031, the mechanical strength of the non-sensing region 103 is made stronger than that of the sensing region 102. When the key structure 10 is pressed by a user, the sensing region 102 is easily deformed, so that the sensor 40 easily receives a signal amount, and the non-sensing region 103 is not easily deformed, so that the overall shape of the substrate 101 is kept stable. By arranging the groove position on the flexible circuit board 20 and the groove 301 on the reinforcing sheet 30, the sensor 40 can be better fixed, and the sensor 40 is prevented from shifting in the using process. Benefit from the utility model discloses an overall structure, the utility model discloses a button structure 10 has good mistake proofing effect of touching. Due to the arrangement of the steel sheets, the overall deformation is increased, and the pressure of the user not only acts on one or more sensors 40 below the sensing area 102, but also acts on the sensors 40 far away from the sensing area 102; assuming no steel sheet is provided, the user's pressure can only act on one or several sensors 40 under the sensing region 102, while sensors 40 far from the sensing region 102 cannot be subjected to pressure or to a small amount of pressure. By providing the steel sheet, the amount of received signals of the sensor 40 is increased, and more sensors 40 output signals, which contributes to improving the reliability of detection.

The utility model discloses a key structure 10 can be applied to mobile terminal, for example, mobile terminal's side button adopts the utility model discloses a key structure 10. Because mobile terminal's side button adopts the utility model discloses a button structure 10, the side button will have good mistake proofing and touch the effect too.

In the above embodiments, the description is made by taking the example where one sensing region 102 is provided on the substrate 101. It will be appreciated that, in practice, the number of sensing regions 102 may be one or more. In implementing the key structure 10 of the present invention, the number of sensing regions 102 can be selected according to actual conditions.

If the key structures are divided by sensing areas 102, i.e. each key structure 10 comprises only one sensing area 102, a plurality of key structures 10 may share one substrate 101, as will be explained below with reference to fig. 6-9.

Please refer to fig. 6-8. The plurality of key structures 10 shown in fig. 6-8 share a substrate 101, wherein each key structure 10 may take the configuration shown in any of fig. 1-4.

The description is continued by taking fig. 6 as an example. The user may press a certain key structure 10 or may press several key structures 10 at the same time. The sensing area 102 and the non-sensing area 103 are sequentially distributed on the substrate 101. Therefore, the user presses one key structure 10 without affecting other key structures 10, and each key structure 10 shares one substrate 101, but each key structure 10 basically does not affect each other. This provides more advantageous conditions for the application of the key structure 10 to mobile terminals, for example, some mobile terminals have more than one side key. The embodiments shown in fig. 7-8 are similar and will not be described again.

Please refer to fig. 10 and 11. The utility model also provides a mobile terminal, mobile terminal includes at least one as above-mentioned button structure 10. Specifically, the mobile terminal may be provided with 1 or more key structures 10, and when a plurality of key structures 10 are provided, the plurality of key structures 10 may share one substrate 101, or may not share the substrate 101.

In some embodiments, the key structure 10 of fig. 6 is provided with only one substrate 101, and 3 key structures 10 share one substrate 101. Of course, fig. 6 illustrates a case where 3 key structures 10 share one substrate 101, but this is merely an example, and a case where 2, 4, or more than 4 key structures 10 share one substrate 101 is similar to the case shown in fig. 6, and therefore, these schemes are not separately shown in the drawings.

Further, the substrate 101 is a housing of the mobile terminal or a middle frame 90 of the mobile terminal. Specifically, the mobile terminal includes a middle frame, the middle frame is composed of a plurality of end-to-end connected frames, one or a plurality of key structures 10 are arranged on the middle frame, and in fig. 10, 3 key structures 10 are arranged on the right frame of the middle frame. Of course, the mobile terminal shown in fig. 10 is only an example, and in the implementation, one or more key structures 10 may be disposed on any one of the frames.

Note also that the mobile terminal shown in fig. 10 and 11 includes 1 key structure 10 shown in fig. 6. Further, the mobile terminal may further include a key structure 10 as shown in fig. 7 or fig. 8. It can also be understood that the mobile terminal shown in fig. 10 and 11 includes 3 key structures 10 shown in fig. 1, and of course, the mobile terminal may also include one or more key structures 10 shown in fig. 1, 2, 3 or 4, which are similar to fig. 10, and no corresponding drawings are given.

Further, the mobile terminal shown in fig. 10 and 11 may also adopt the key structure 10 shown in fig. 2, 3 or 4, and when the mobile terminal uses the key structure 10 shown in fig. 1, 2, 3 or 4, the number used is not limited to 3 illustrated in fig. 10, but 2, 4 or more than 4 may be selected according to actual situations, and thus, the examples are not illustrated in the drawings.

Further, when the mobile terminal uses the key structure 10 shown in fig. 1, 2, 3 or 4, any one or a combination of a plurality of the key structures 10 shown in fig. 1, 2, 3 or 4 may be used in the same mobile terminal.

Since the mobile terminal of the embodiment includes the key structure 10, for example, the key structure 10 is applied to a side key of the mobile terminal, and the side key has a good effect of preventing accidental touch. When the key structure 10 is applied to a plurality of side keys of the mobile terminal, the respective key structures 10 are not substantially affected by each other, which enables the respective side keys to have a good anti-false-touch effect.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A key structure, comprising:

a circuit board mounted within the sensing region;

2. The key structure of claim 1, wherein the non-sensing area of the substrate has a support portion such that the thickness of the non-sensing area is greater than the thickness of the sensing area.

3. The key structure of claim 2, wherein the non-sensing regions are disposed at two ends of each sensing region along the length direction, and at least one supporting portion is disposed at a boundary between each non-sensing region and the sensing region.

4. The key structure according to claim 2 or 3, wherein the support portion is provided on a side of the substrate facing the circuit board, or the support portion is provided on a side of the substrate facing away from the circuit board.

5. The key structure of claim 2, further comprising a reinforcing sheet;

the reinforcing sheet is arranged in the sensing area and is positioned between the substrate and the circuit board; or the reinforcing sheet is arranged on one side of the circuit board far away from the substrate, and the installation position of the reinforcing sheet is opposite to the sensing area.

6. The key structure of claim 5, wherein at least one side of the reinforcing sheet is provided with a plurality of grooves, and at least one of the grooves is provided with one or more sensors.

7. The key structure of claim 6, wherein the grooves are aligned along a length of the reinforcing sheet.

8. The key structure according to any one of claims 5 to 7, wherein the reinforcing sheet is a steel sheet.

9. A mobile terminal, characterized in that it comprises at least one key structure according to any of claims 1 to 8.

10. The mobile terminal of claim 9, wherein the substrate is a housing of the mobile terminal or a middle frame of the mobile terminal.