CN219872341U

CN219872341U - Pressure sensor assembly and touch panel module

Info

Publication number: CN219872341U
Application number: CN202320746523.5U
Authority: CN
Inventors: 邹伏军
Original assignee: Chipsea Technologies Shenzhen Co Ltd
Current assignee: Chipsea Technologies Shenzhen Co Ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-10-20
Anticipated expiration: 2033-03-31

Abstract

The embodiment of the utility model provides a pressure sensor assembly and a touch pad module. The pressure sensor assembly includes: the support comprises a supporting part and a plurality of cantilevers, the cantilevers are connected with the supporting part, and a hollowed-out structure is formed between the suspended part of at least part of the cantilevers and the supporting part; and the pressure detection elements are arranged on each cantilever and are connected with a flexible circuit board, and the flexible circuit board is attached to the supporting part. According to the pressure sensor assembly provided by the embodiment of the utility model, the plurality of cantilevers are arranged on the supporting part of the bracket, and each cantilever is provided with the pressure detection element, so that the pressure detection point can be increased. Simultaneously, set up hollow out construction between cantilever and supporting part for the cantilever takes place deformation more easily when receiving pressure, thereby improves the sensitivity of pressure sensor subassembly.

Description

Pressure sensor assembly and touch panel module

Technical Field

The utility model relates to the technical field of touch control, in particular to a pressure sensor assembly and a touch control panel module.

Background

The touch control panel module is widely applied to an input device of a notebook computer, is generally used for replacing a mouse function, and the touch panel can sense the movement of a user finger on the panel and can achieve the function of mouse movement; in addition, the touch control panel module is provided with a pressure sensor assembly, a plurality of pressure detection elements are integrated on the pressure sensor module, the pressing action of a user can be perceived, and when the pressing force reaches a certain threshold value, the control chip can output a signal to the host computer to trigger a corresponding instruction, so that the button function of the mouse is realized.

In the prior art, the pressure sensor assembly comprises a steel sheet, a plurality of elastic arms are integrated on the steel sheet, and each elastic arm is provided with a pressure sensing resistor to realize a pressure detection function. The elastic arm is generally directly formed by the end part of the steel sheet, and the structure easily causes the insufficient sensitivity of the elastic arm due to the relatively large size of the joint of the elastic arm and the steel sheet main body.

Disclosure of Invention

In view of the above problems, embodiments of the present utility model provide a pressure sensor assembly and a touch pad module to solve the above technical problems.

In a first aspect, an embodiment of the present utility model provides a pressure sensor assembly comprising:

the support comprises a supporting part and a plurality of cantilevers, the cantilevers are connected with the supporting part, and a hollowed-out structure is formed between the suspended part of at least part of the cantilevers and the supporting part;

and the pressure detection elements are arranged on each cantilever and are connected with a flexible circuit board, and the flexible circuit board is attached to the supporting part.

Further, the pressure detecting element comprises a pressure sensing resistor and an elastic pad, wherein the projections of the pressure sensing resistor and the elastic pad on the plane of the cantilever are staggered with each other,

the pressure sensing resistor is arranged along the central line of the length direction of the cantilever, and the elastic pad is arranged at a position close to the free end of the cantilever and is perpendicular to the central line of the length direction of the cantilever.

Further, a plurality of fixing pieces are arranged at the joint of the cantilever and the supporting part, and the fixing pieces are symmetrically distributed on two sides of the center line of the length direction of the cantilever.

Further, the support portion is strip-shaped, and the plurality of pressure detecting elements are distributed along the length direction of the support portion.

Further, each pressure detecting element comprises a plurality of pressure sensing resistors, and the plurality of pressure sensing resistors are symmetrically distributed along the center line of the length direction of the cantilever.

Further, the supporting portion is a rectangular sheet, the hollowed-out structure is a U-shaped hole formed in the supporting portion, and the cantilever is formed at the inner side of the U-shaped hole.

Further, the supporting portion and the cantilevers are rectangular pieces, the cantilevers are arranged on the same side of the supporting portion, at least part of the cantilevers are arranged in parallel with the length direction of the supporting portion, and the hollow-out structure is a gap formed between the cantilevers and the supporting portion.

Further, two ends of the supporting portion are respectively provided with a first cantilever parallel to the supporting portion, a second cantilever is arranged between the two first cantilevers, and free ends of the two first cantilevers face to the second cantilever.

Further, the second cantilever is parallel or perpendicular to the support portion.

Further, the support portion is formed with a relief hole.

In a second aspect, an embodiment of the present utility model further provides a touch pad module, including a touch pad and at least one pressure sensor assembly described above.

Further, a plurality of the pressure sensor assemblies are provided, wherein at least two of the pressure sensor assemblies are disposed parallel to each other on the mounting surface of the touch panel.

Further, an avoidance hole is formed in the support of the pressure sensor assembly, and the touch pad module further comprises a motor assembly which is arranged in the avoidance hole.

Further, the touch pad module further includes a motor assembly disposed between the two pressure sensor assemblies.

Further, the touch pad module further comprises an NFC component, wherein the NFC component is arranged between the two pressure sensor components and is located at the center of the touch pad module.

According to the pressure sensor assembly provided by the embodiment of the utility model, the plurality of cantilevers are arranged on the supporting part of the bracket, and each cantilever is provided with the pressure detection element, so that the pressure detection point can be increased. Simultaneously, set up hollow out construction between cantilever and supporting part for the cantilever takes place deformation more easily when receiving pressure, thereby improves the sensitivity of pressure sensor subassembly.

These and other aspects of the utility model will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a pressure sensor assembly according to an embodiment of the present utility model.

Fig. 2 is a schematic structural diagram of a pressure sensor assembly according to another embodiment of the present utility model.

Fig. 3 is a schematic structural diagram of a pressure sensor assembly according to another embodiment of the present utility model.

Fig. 4 is a schematic structural diagram of a touch pad module according to an embodiment of the utility model.

In the drawing the view of the figure,

1. a pressure sensor assembly; 11. a support part; 12. a first cantilever; 13. a second cantilever; 14. a fixing member; 15. a pressure-sensitive resistor; 16. an elastic pad; 17. a flexible circuit board; 18. a connector; 19. a U-shaped hole; 2. a touch panel; 3. a printed circuit board; 31. a reflection plate; 311. avoiding the notch; 32. a linear motor.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In order to enable those skilled in the art to better understand the solution of the present utility model, the following description will make clear and complete descriptions of the technical solution of the present utility model in the embodiments of the present utility model with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the embodiments of the present utility model, it should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In describing embodiments of the present utility model, words such as "exemplary" or "such as" are used to mean illustrated, described, or described. Any embodiment or design described as "exemplary" or "such as" in an embodiment of the utility model is not necessarily to be construed as preferred or advantageous over another embodiment or design. The use of words such as "example" or "such as" is intended to present relative concepts in a clear manner.

In addition, the term "plurality" in the embodiments of the present utility model means two or more, and in view of this, the term "plurality" may be understood as "at least two" in the embodiments of the present utility model. "at least one" may be understood as one or more, for example as one, two or more. For example, including at least one means including one, two or more, and not limiting what is included, e.g., including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A and B and C, may be included.

The touch control board is widely applied to notebook computers as input equipment, and a control instruction is generated to control the computer by collecting the pressing force of a user finger on the touch control board so as to realize part or all of the operation functions of the mouse.

Existing touch pads typically utilize a pressure sensor assembly to detect pressure, the pressure sensor assembly including a support on which a cantilever is provided, and a sensor disposed on the cantilever to detect pressure. In the prior art, the accuracy of pressure detection is often improved by increasing the number of detection points, namely the number of cantilevers, but the number of pressure sensors cannot be too large due to the area of the touch pad. Moreover, the number of the cantilevers is increased, so that the detection precision of the whole touch panel can be improved, but as the support is formed by steel sheets, the sensitivity of deformation of the single cantilever caused by pressure is lower, so that the touch sensitivity of the whole touch panel is not high enough. According to the utility model, the hollow structure is arranged between the support part of the support and the cantilever, so that the cantilever is easier to deform when being stressed, and the sensitivity of the pressure sensor assembly is improved.

The utility model will be described in detail with reference to specific examples below:

the pressure sensor assembly 1 provided by the embodiment of the utility model is applied to a touch pad module and is used for detecting the pressure applied to the touch pad module. For example, as shown in fig. 1 and 2, the pressure sensor assembly 1 has an overall elongated shape, and includes: the support comprises a supporting part 11 and a plurality of cantilevers, the cantilevers are connected with the supporting part 11, and a hollowed-out structure is formed between the suspended part of at least part of the cantilevers and the supporting part 11, so that the cantilevers can deform under the action of smaller pressure; and each cantilever is provided with a pressure detection element, the pressure detection elements are used for detecting deformation of the cantilever to detect pressure, the pressure detection elements are connected with a flexible circuit board 17, and the flexible circuit board 17 is attached to the supporting part 11.

In one embodiment of the present utility model, the support is integrally formed, for example, the supporting portion 11 and the cantilever are formed of stainless steel or aluminum having elasticity, so that at least the cantilever can be elastically deformed by a certain amount when the touch pad of the touch pad module is pressed, and the initial state of the touch pad can be restored after the pressure on the touch pad is removed. The hollow structure is arranged to reduce the size of the part connected between the cantilever and the supporting part 11, the deformation of the cantilever is reduced by the constraint of the supporting part 11, and the sensitivity of the deformation of the cantilever under pressure is improved. Alternatively, the openings formed at both sides of the joint between the cantilever and the supporting portion 11 may form a hollowed-out structure, or the gap formed between the cantilever and the supporting portion 11 may form a hollowed-out structure.

The cantilever is provided in plurality, and the plurality of cantilevers includes a first cantilever 12 provided at both ends of the supporting portion 11 and a second cantilever 13 provided between the two first cantilevers 12, and the first cantilever 12 and the second cantilever 13 may each be of a rectangular sheet-like structure, and each of the first cantilever 12 and the second cantilever 13 is provided with a pressure detecting element thereon.

In one embodiment of the present utility model, as shown in fig. 2, the supporting portion 11 is in a rectangular sheet structure, the cantilever is formed in the supporting portion 11, the hollowed-out structure is a U-shaped hole 19 formed in the supporting portion 11, and the cantilever is formed in a rectangular sheet shape inside the U-shaped hole 19. For example, the first cantilevers 12 include two cantilevers respectively provided at both ends of the support portion 11, free ends of the two first cantilevers 12 are each directed toward a middle portion of the support portion 11, the second cantilevers 13 are provided between the two first cantilevers 12, and free ends of the second cantilevers 13 are directed toward any one of the first cantilevers 12. Alternatively, the first cantilever 12 and the second cantilever 13 are positioned on the same straight line.

In one embodiment, the support portion 11 is formed with a relief hole, and the relief hole is located in the middle portion of the support portion 11. When installed on the touch pad module, the avoidance holes can provide avoidance space for other components on the touch pad module, such as the linear motor 32.

In one embodiment of the present utility model, the supporting portion 11 and the cantilevers are rectangular plates, the cantilevers are disposed on the same side of the supporting portion 11, at least part of the cantilevers are disposed parallel to the length direction of the supporting portion 11, and the hollow structure is a gap formed between the cantilevers and the supporting portion 11. For example, one first cantilever 12 is disposed at each end of the supporting portion 11, a second cantilever 13 is disposed at a position between the two first cantilevers 12, free ends of the two first cantilevers 12 face the second cantilever 13, and the second cantilever 13 is disposed perpendicular to or parallel to the supporting portion 11.

For example, as shown in fig. 1, two first cantilevers 12 are disposed in parallel with the support portion 11 at both ends of the support portion 11, a second cantilever 13 is disposed perpendicularly to the support portion 11 between the two first cantilevers 12, and free ends of the two first cantilevers 12 are disposed toward the second cantilever 13.

As an embodiment, as shown in fig. 2, the piezoresistors 15 on the plurality of cantilevers are distributed along the length direction of the support 11. Alternatively, as shown in fig. 3, the pressure sensing resistors 15 on the plurality of cantilevers are distributed along the same straight line parallel to the length direction of the supporting portion 11, that is, the pressure sensing resistors 15 on each cantilever are located on substantially the same straight line, so that the uniformity and sensitivity of pressure detection can be improved. Alternatively, all or part of the longitudinal direction of the pressure sensitive resistor 15 is parallel to the longitudinal direction of the support 11.

As an example, as shown in fig. 3, the first cantilever 12 and the second cantilever 13 are each disposed in parallel with the longitudinal direction of the supporting portion 11, the first cantilever 12 and the second cantilever 13 are located on the same side of the supporting portion 11, the free ends of the two first cantilevers 12 are each disposed toward the second cantilever 13, and the lines of the first cantilever 12 and the second cantilever 13 are on the same line, so that the piezoresistors 15 on the plurality of cantilevers are on the same line.

As an embodiment, the second cantilever 13 is disposed near one of the first cantilevers 12, that is, the second cantilever 13 is away from the center of the supporting portion 11, so as to provide an avoidance space for the arrangement of the linear motor 32 of the touch pad module, and ensure that the linear motor 32 can be disposed on a line connecting midpoints of two long sides of the printed circuit board, so as to provide more uniform vibration feedback.

The connection part between the cantilever and the supporting part 11 is provided with a plurality of fixing parts 14 for realizing the connection between the touch pad module and an external structure such as an equipment main body, the plurality of fixing parts 14 are symmetrically distributed on two sides of a center line in the length direction of the cantilever, for example, the fixing parts 14 are two, and the two fixing parts 14 are symmetrically distributed on two sides of the center line in the length direction of the cantilever. A plurality of fixing members 14 are provided on the supporting portion 11 at positions near the cantilever, and alternatively, the fixing members 14 include fixing holes formed on the supporting portion 11, and can be mounted in cooperation with fixing screws to achieve connection of the touch pad module with an external structure such as an apparatus body.

In one embodiment of the present utility model, the pressure detecting element includes a pressure sensing resistor 15 and an elastic pad 16, where the projections of the pressure sensing resistor 15 and the elastic pad 16 on the plane of the cantilever are staggered, for example, the pressure sensing resistor 15 and the elastic pad 16 are disposed on the same plane of the cantilever and staggered, or the pressure sensing resistor 15 and the elastic pad 16 are disposed on different planes of the cantilever and staggered.

Alternatively, the pressure sensing resistor 15 is adhered to the cantilever, and when the cantilever is deformed by pressure, the pressure sensing resistor 15 adhered to the cantilever is also deformed to detect the pressure applied to the cantilever. The pressure sensing resistor 15 is arranged along the center line of the length direction of the cantilever, so that the deformation of the cantilever can be detected more sensitively, and the elastic pad 16 is arranged at a position close to the free end of the cantilever and is perpendicular to the center line of the length direction of the cantilever. Alternatively, the elastic pad 16 is a silica gel pad, and two sides of the pad are respectively connected with the cantilever and the printed circuit board in an adhesive manner.

Illustratively, each pressure sensing resistor 15 may include one or more pressure sensitive resistive elements. For example, the pressure sensing resistor 15 may be a wheatstone half bridge formed by a pressure sensitive resistor element and a fixed resistor element; or a wheatstone half-bridge formed by two pressure sensitive resistance elements; alternatively, the at least one pressure sensitive resistive element and the at least one fixed resistive element form a wheatstone full bridge; alternatively, a wheatstone full bridge of four pressure sensitive resistive elements.

The pressure detecting element further includes a flexible circuit board 17, and the pressure sensing resistors 15 on the plurality of cantilevers are electrically connected to the flexible circuit board 17, and optionally, the flexible circuit board 17 has a long strip structure and is disposed along the supporting portion 11. The flexible circuit board 17 is also provided with a connector 18, and the connector 18 is used for electrically connecting with a connection terminal on the printed circuit board.

The utility model also provides a touch pad module, as shown in fig. 4, comprising a touch pad 2, a printed circuit board 3 and at least one pressure sensor assembly 1, wherein the touch pad 2 comprises a touch surface and a connecting surface, the touch surface is used for touch operation, and the connecting surface is used for being connected with the printed circuit board 3; the first side of the printed circuit board 3 is intended to be connected to a connection side of the touch pad 2, and the pressure sensor assembly 1 is arranged on the second side of the printed short-circuit board.

Optionally, the printed circuit board 3 has a rectangular structure, and the electronic component includes: the NFC module is arranged at the center of the second surface of the printed circuit board 3 and is electrically connected with the printed circuit board 3 and used for wireless data transmission of other mobile terminals; the motor assembly includes a linear motor 32 located near the NFC module and electrically connected to the printed circuit board 3 for responding to the pressure received by the touch pad 2 and for performing vibration feedback. The pressure sensor assembly 1 is provided with at least two, is electrically connected with the printed circuit board 3, and is arranged at a position close to the edge of the printed circuit board 3 for outputting corresponding pressure sensing signals when the touch panel 2 is stressed.

In one embodiment of the present utility model, the linear motor 32 is disposed on a midpoint connection line of two long sides of the second surface of the printed circuit board 3 and is disposed near the NFC module, so that it can be located as close to the central position of the printed circuit board 3 as possible to improve the feedback accuracy thereof.

Optionally, the NFC module includes a coil and a reflecting plate 31, where the coil is formed on the second surface of the printed circuit board 3, the reflecting plate 31 is attached to the second surface of the printed circuit board 3 and covers an area where the coil is located, the coil is used to generate a connection signal to be wirelessly connected with the mobile terminal, the reflecting plate 31 is used to reflect the signal, so that the signal generated by the coil is transmitted to a side deviating from the reflecting plate 31, that is, the signal generated by the coil is transmitted to the first surface of the printed circuit board 3, so that the signal strength of connection between the coil and the mobile terminal is enhanced, and the reflecting plate 31 may be made of ferrite material, for example. Wherein, the reflection plate 31 is formed with an avoidance gap 311, and the avoidance gap 311 provides an installation space for the linear motor 32. Optionally, when the reflective plate 31 is formed with the avoidance gap 311, the mounting requirement of the linear motor 32 can be met without setting the avoidance space on the bracket, and the setting of the avoidance gap 311 can make the linear motor 32 be set as close to the central position of the printed circuit board 3 as possible.

Although the present utility model has been described in terms of the preferred embodiments, it should be understood that the present utility model is not limited to the specific embodiments, but is capable of numerous modifications and equivalents, and alternative embodiments and modifications of the embodiments described above, without departing from the spirit and scope of the present utility model.

Claims

1. A pressure sensor assembly, comprising:

2. The pressure sensor assembly of claim 1, wherein the pressure sensing element comprises a pressure sensing resistor and a spring pad, the projections of the pressure sensing resistor and the spring pad on the plane of the cantilever being offset from each other, wherein,

3. The pressure sensor assembly of claim 2, wherein a plurality of fixing members are provided at the connection of the cantilever and the supporting portion, and the plurality of fixing members are symmetrically distributed at both sides of a center line in a length direction of the cantilever.

4. The pressure sensor assembly of claim 2, wherein the support portion is strip-shaped in shape and the plurality of pressure sensing elements are distributed along a length of the support portion.

5. The pressure sensor assembly of claim 2, wherein each of said pressure sensing elements comprises a plurality of said pressure sensing resistors symmetrically distributed along a centerline of said cantilever in a length direction.

6. The pressure sensor assembly of any one of claims 1-5, wherein the support is a rectangular sheet, the hollowed-out structure is a U-shaped hole formed in the support, and the cantilever is formed inside the U-shaped hole.

7. The pressure sensor assembly of any one of claims 1-5, wherein the support and the cantilever are rectangular sheets, the plurality of cantilevers are disposed on the same side of the support, at least a portion of the cantilevers are disposed parallel to a length direction of the support, and the hollowed-out structure is a gap formed between the cantilever and the support.

8. The pressure sensor assembly of claim 7, wherein the support portion has a first cantilever disposed at each end thereof parallel to the support portion, and a second cantilever disposed between the two first cantilevers, the free ends of the two first cantilevers facing the second cantilever.

9. The pressure sensor assembly of claim 8, wherein the second cantilever is parallel or perpendicular to the support.

10. The pressure sensor assembly of claim 1, wherein the support portion has a relief aperture formed therein.

11. A touch pad module comprising a touch pad and at least one pressure sensor assembly according to any one of claims 1-10.

12. The touch pad module of claim 11, wherein a plurality of said pressure sensor assemblies are provided, wherein at least two of said pressure sensor assemblies are disposed parallel to each other on a mounting surface of said touch pad.

13. The touch pad module of claim 12, wherein the support of the pressure sensor assembly has an escape aperture formed therein, the touch pad module further comprising a motor assembly disposed in the escape aperture.

14. The touch pad module of claim 12, further comprising a motor assembly disposed between two of the pressure sensor assemblies.

15. The touch pad module of claim 12, further comprising an NFC component disposed between the two pressure sensor components and centered on the touch pad module.