A pressure sensing device

Abstract

The utility model belongs to sensing equipment technical field relates to a pressure sensing device, including shell and cooperation setting on the shell upper cover, the shell and upper cover form the accommodation space between, be provided piezoelectric wafer in the accommodation space, piezoelectric wafer and shell fixedly bond between, and piezoelectric wafer and shell still have the lug between connection, the shell has the recess portion with piezoelectric wafer coaxial setting in, and the convex part correspondingly piezoelectric wafer circumferential setting, piezoelectric wafer fixedly bond on the convex part, the lug one side and piezoelectric wafer bond, the other side and the convex rib on the shell corresponding connection. The utility model can improve the voltage of knock feedback, and its feedback highest voltage is about 10V, has simple structure, and it is convenient to assemble, stable performance, effect is improved obviously and so on advantage.

Description

Technical Field

[0001] This utility model belongs to the field of sensing equipment technology, specifically relating to a pressure sensing device. Background Technology

[0002] A strike sensor is a pressure sensor that is fixed to the object being tested. It uses the basic characteristic of detecting instantaneous acceleration to sense the strike signal. When the pressure sensor senses the strike signal, it outputs a pulse signal to notify the main controller.

[0003] Existing pressure sensing devices use a design that directly attaches a ceramic plate to the outer casing (plastic or metal). This results in a very small voltage generated by the pressure after the casing is struck, which cannot meet the actual usage requirements. Utility Model Content

[0004] The purpose of this invention is to address the defects and shortcomings in the existing technology by designing a pressure sensing device that is simple in structure, stable and reliable, and capable of improving the feedback voltage.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a pressure sensing device, including a housing and a top cover that is fitted onto the housing, a receiving space is formed between the housing and the top cover, a piezoelectric sheet is disposed in the receiving space, the piezoelectric sheet is fixedly bonded to the housing, and a protrusion is also connected between the piezoelectric sheet and the housing.

[0006] Preferably, the housing has a recessed portion coaxially arranged with the piezoelectric sheet, and a protrusion arranged circumferentially corresponding to the piezoelectric sheet, wherein the piezoelectric sheet is fixedly bonded to the protrusion.

[0007] Preferably, the protrusion is disposed between the piezoelectric sheet and the recess, with one side of the protrusion bonded to the piezoelectric sheet and the other side connected to the protruding rib in the recess.

[0008] Preferably, the rib includes a first rib that engages with the protrusion and a second rib that connects the first rib to the protrusion.

[0009] Preferably, the piezoelectric sheet comprises a ceramic sheet and a substrate.

[0010] Preferably, the bump is made of silicone rubber with a Rockwell hardness of not less than 85 HRC.

[0011] Preferably, the outer shell is bonded to the panel using double-sided adhesive.

[0012] Preferably, the outer casing is provided with threaded holes, and is fixedly connected to the panel through the threaded holes and screws.

[0013] Preferably, it also includes a circuit board, which is built into or attached to the receiving space.

[0014] After adopting the above technical solution, the pressure sensing device provided by this utility model has the following beneficial effects:

[0015] This invention, through the design of the recessed portion, provides clearance space for the vibration of the piezoelectric element, ensuring the vibration effect of the piezoelectric element; through the cooperative design of the protrusions and ribs, it amplifies the vibration signal and enhances the vibration transmission capability; through the design of double-sided adhesive and / or threaded holes, it ensures the stability and reliability of the device installation; in summary, this invention can both improve the voltage of the impact feedback and ensure the assembly effect, and has the advantages of simple structure, stable performance, and significantly improved effect. Attached Figure Description

[0016] Figure 1 This is a structural cross-sectional view of a pressure sensing device according to the present invention.

[0017] The components are: 1. Outer shell; 2. Top cover; 3. Piezoelectric sheet; 4. Protrusion; 5. Threaded hole; 6. Recess; 7. Protrusion; 8. Rib. Detailed Implementation

[0018] The present invention will now be described in further clear and complete detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0021] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0022] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0023] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0024] This utility model discloses a pressure sensing device, such as... Figure 1 As shown, it includes a housing 1 and a top cover 2 that fits on the housing 1. A receiving space is formed between the housing 1 and the top cover 2. A piezoelectric sheet 3 is disposed in the receiving space. The piezoelectric sheet 3 includes a ceramic sheet and a substrate. The piezoelectric sheet 3 is fixedly bonded to the housing 1, and a protrusion 4 is also connected between the piezoelectric sheet 3 and the housing 1.

[0025] The outer shell 1 has a recessed portion 6 coaxially arranged with the piezoelectric sheet 3 and a protruding portion 7 circumferentially arranged corresponding to the piezoelectric sheet 3. The piezoelectric sheet 3 is fixedly bonded to the protruding portion 7, that is, the piezoelectric sheet 3 is circumferentially fixed to the protruding portion 7, with the middle position corresponding to the recessed portion 6. This design can provide clearance space for the vibration of the piezoelectric sheet 3 and ensure the vibration effect of the piezoelectric sheet 3. The protrusion 4 is arranged between the piezoelectric sheet 3 and the recessed portion 6. Specifically, one side of the protrusion 4 is bonded to the center position of the piezoelectric sheet 3, and the other side is connected to the rib 8 in the recessed portion 6. The rib 8 includes a first rib that cooperates with the protrusion and a second rib that connects the first rib and the protruding portion. This design can amplify the signal and enhance the vibration transmission capability. Specifically, the protrusion 4 is made of silicone rubber with a Rockwell hardness HRC of not less than 85, preferably 95±5.

[0026] In use, the pressure sensing device of this utility model can be attached to the user panel by double-sided adhesive, or by setting threaded holes 5 on both sides of the outer shell 1 and fixing it to the user panel by threaded holes 5 and screws. Alternatively, to further ensure the connection effect, both of the above connection methods can be used at the same time, namely, the fixing method of double-sided adhesive and screws. In this way, the appropriate fixing method can be selected according to the actual use scenario. Furthermore, the circuit board of this sensing device has various configuration forms, which can be selected according to the actual use requirements. It can be built-in or external.

[0027] In summary, the pressure sensing device provided by this utility model can improve the voltage of the tap feedback, with a maximum feedback voltage of about 10V. It has the advantages of simple structure, easy assembly, stable performance, and significantly improved effect, and has great market value, making it worthy of widespread promotion and application.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure sensing device, characterized by: It includes a shell (1) and a top cover (2) that fits on the shell (1). A receiving space is formed between the shell (1) and the top cover (2). A piezoelectric sheet (3) is disposed in the receiving space. The piezoelectric sheet (3) is fixedly bonded to the shell (1), and a protrusion (4) is also connected between the piezoelectric sheet (3) and the shell (1).

2. A pressure sensing device according to claim 1, wherein: The outer shell (1) has a recess (6) coaxially arranged with the piezoelectric sheet (3) and a protrusion (7) arranged circumferentially corresponding to the piezoelectric sheet (3), and the piezoelectric sheet (3) is fixedly bonded to the protrusion (7).

3. A pressure sensing device according to claim 2, wherein: The protrusion (4) is disposed between the piezoelectric sheet (3) and the recess, and one side of the protrusion (4) is bonded to the piezoelectric sheet (3), while the other side is connected to the protruding rib (8) in the recess.

4. A pressure sensing device according to claim 3, wherein: The rib (8) includes a first rib that is connected to the protrusion (4) and a second rib that is connected between the first rib and the protrusion.

5. A pressure sensing device according to claim 1, wherein: The piezoelectric sheet (3) includes a ceramic sheet and a substrate.

6. A pressure sensing device according to claim 1, characterized in that: The bump (4) is made of silicone rubber with a Rockwell hardness of not less than 85 HRC.

7. A pressure sensing device according to claim 1, characterized in that: The outer shell (1) is bonded to the panel by double-sided adhesive.

8. A pressure sensing device according to claim 1, characterized in that: The outer casing (1) is provided with threaded holes (5), and is fixedly connected to the panel through the threaded holes (5) and screws.

9. A pressure sensing device according to claim 1, characterized in that: It also includes a circuit board, which is built into or attached to the receiving space.

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