Onboard pressure sensor

Abstract

The utility model discloses an onboard pressure sensor, which comprises a pressure sensitive element and a signal processing circuit board which are electrically connected, the pressure sensitive element is arranged right above the signal processing circuit board, a first fastener is sleeved outside the pressure sensitive element, and a second fastener is sleeved outside the signal processing circuit board. The signal processing circuit board is sleeved with a second buckling piece, and the first buckling piece and the second buckling piece are stacked and mutually clamped and fixed. According to the application, the pressure sensitive element and the signal processing circuit board form an up-and-down laminated structure through the arrangement of the first buckling piece and the second buckling piece, the pressure sensitive element is directly pressed from the top during use, and the pressure sensitive element outputs an electric signal to the signal processing circuit board at the outer lower part after sensing the pressure; and corresponding electric signals are output after being processed by the signal processing circuit board, namely, integrated layout is adopted, so that space is greatly saved, and the device is suitable for installation and application of micro-miniature equipment such as various air pressure valves and the like.

Description

Technical Field

[0001] The utility model relates to a sensor, in particular to a board-mounted pressure sensor. Background Art

[0002] Pressure transducer is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules. Pressure sensor is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electricity, ships, machine tools, pipelines and many other industries.

[0003] In the prior art, a pressure sensor is usually composed of a pressure sensitive element and a signal processing unit. The separate parts of the two, namely the pressure sensitive element and the signal processing unit, are placed in different devices respectively, and the signal is transmitted in the middle by wires or other means. However, the above solution requires a relatively large space to implement and is difficult to be widely used in micro-devices. Utility Model Content

[0004] In order to solve the above-mentioned problems, the utility model provides a board-mounted pressure sensor, including a pressure sensitive element and a signal processing circuit board, which are electrically connected. The pressure sensitive element is arranged directly above the signal processing circuit board, a first fastener is connected to the outer shell of the pressure sensitive element, and a second fastener is connected to the outer shell of the signal processing circuit board. The first fastener and the second fastener are stacked and fixed to each other.

[0005] Furthermore, the pressure sensitive element is a capacitive pressure sensitive element, which is in the shape of a rectangular metal film. A conductive rod is provided at the bottom of the pressure sensitive element, and the conductive rod electrically connects the pressure sensitive element and the signal processing circuit board.

[0006] Furthermore, a first accommodating cavity is provided in the first fastener, and the pressure sensitive element is configured in the first accommodating cavity.

[0007] Furthermore, a first protrusion protruding downward is provided at the bottom of the first fastener, and a first groove matching the number of the first protrusions recessed inward is provided on the circumferential surface of the second fastener, and when the first fastener and the second fastener are stacked, an interference fit is formed between the first protrusion and the first groove.

[0008] Furthermore, a contact portion is provided on the circumferential surface of the first clip. When the first clip and the second clip are stacked, the first accommodating cavity is formed by wrapping the tops of the first clip and the second clip and the contact portion.

[0009] Furthermore, a second accommodating cavity is provided in the second fastener, and the signal processing circuit board is configured in the second accommodating cavity.

[0010] Furthermore, a second protrusion protruding upward is provided on the top of the second fastener, and a second groove matching the number of the second protrusions recessed inward is provided on the circumferential surface of the first fastener, and when the first fastener and the second fastener are stacked, an interference fit is formed between the second protrusion and the second groove.

[0011] Furthermore, pins for transmitting electrical signals to the outside are arranged at the bottom of the signal processing circuit board.

[0012] Furthermore, a gasket is arranged on the top of the pressure sensitive element.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] Compared with the prior art, the present application forms an upper and lower stacked structure between the pressure sensitive element and the signal processing circuit board by setting a first clamping part and a second clamping part. When in use, the pressure sensitive element is pressed directly from the top. After sensing the pressure, the pressure sensitive element outputs an electrical signal to the signal processing circuit board below, and then outputs the corresponding electrical signal to the outside after being processed by the signal processing circuit board. That is, an integrated layout is adopted, which greatly saves space and is suitable for installation and application of micro-sized equipment such as various air pressure valves.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is a schematic diagram of the overall structure of the onboard pressure sensor of the utility model;

[0018] Figure 2This is an exploded view of the overall structure of the onboard pressure sensor of the utility model;

[0019] Figure 3 This is a schematic structural diagram of a first fastener of the onboard pressure sensor of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the second fastener of the onboard pressure sensor of the utility model;

[0021] Figure 5 This is a cross-sectional view of the overall structure of the board-mounted pressure sensor of the utility model.

[0022] The reference numerals and names in the figures are as follows:

[0023] Pressure sensitive element 100, signal processing circuit board 200, first snap member 300, second snap member 400, conductive rod 110, first accommodating cavity 310, first protrusion 320, first groove 410, abutment portion 330, second accommodating cavity 420, second protrusion 430, second groove 340, pin 210, washer 500. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The utility model is described in more detail. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements between them. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements between them.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise stated, these directional words 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 cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. In the description of the present utility model, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning, and therefore cannot be understood as limiting the scope of protection of the present utility model. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by technicians in the technical field of the utility model. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the utility model.

[0028] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0029] The preferred implementation of the utility model is now further described in conjunction with the existing drawings. Figure 1 , Figure 2 and Figure 5As shown, the onboard pressure sensor includes a pressure sensitive element 100 and a signal processing circuit board 200, which are electrically connected. The pressure sensitive element 100 is arranged directly above the signal processing circuit board 200, a first fastener 300 is connected to the outer sleeve of the pressure sensitive element 100, and a second fastener 400 is connected to the signal processing circuit board 200. The first fastener 300 and the second fastener 400 are stacked and fixed to each other. Compared with the traditional pressure sensitive element 100 and the signal processing circuit board 200 adopting a split layout, the present application will adopt The first clamping member 300 and the second clamping member 400 are arranged to form an upper and lower stacked structure between the pressure sensitive element 100 and the signal processing circuit board 200. When in use, the pressure sensitive element 100 is directly pressed from the top. After sensing the pressure, the pressure sensitive element 100 outputs an electrical signal to the signal processing circuit board 200 below, and then outputs the corresponding electrical signal to the outside after being processed by the signal processing circuit board 200. From the above, it can be seen that the present application adopts an integrated layout, which greatly saves space and is suitable for installation and application of micro-sized equipment such as CNC brake solenoid valves.

[0030] Further on the basis of the above embodiment, the pressure sensitive element 100 is specifically a capacitive pressure sensitive element 100, which is in the shape of a rectangular metal film. A conductive rod 110 is arranged at the bottom of the pressure sensitive element 100, and the conductive rod 110 forms an electrical connection between the pressure sensitive element 100 and the signal processing circuit board 200.

[0031] On the basis of the above embodiments, Figure 3 As shown, a first accommodating cavity 310 is disposed in the first fastener 300 , and the pressure sensitive element 100 is disposed in the first accommodating cavity 310 .

[0032] Further on the basis of the above embodiment, a downwardly protruding first protrusion 320 is provided at the bottom of the first fastener 300, and the circumferential surface of the second fastener 400 is provided with first grooves 410 that match the number of the first protrusions 320 recessed inwardly, and when the first fastener 300 and the second fastener 400 are stacked, an interference fit is formed between the first protrusion 320 and the first groove 410, thereby forming a fixation between the two.

[0033] Further on the basis of the above embodiment, the circumferential surface of the first fastener 300 is provided with an abutment portion 330. When the first fastener 300 and the second fastener 400 are stacked, the first accommodating cavity 310 is wrapped by the top of the first fastener 300 and the second fastener 400 and the abutment portion 330.

[0034] Further on the basis of the above embodiment, Figure 4 As shown, a second accommodating cavity 420 is provided in the second fastener 400 , and the signal processing circuit board 200 is disposed in the second accommodating cavity 420 .

[0035] On the basis of the above embodiment, a second protrusion 430 protruding upward is provided on the top of the second clip 400, and a second groove 340 matching the number of the second protrusion 430 recessed inward is provided on the circumferential surface of the first clip 300. When the first clip 300 and the second clip 400 are stacked, an interference fit is formed between the second protrusion 430 and the second groove 340, so that the fixation between the two is better and more stable.

[0036] Further on the basis of the above embodiment, a pin 210 for transmitting a signal to the outside is arranged at the bottom of the signal processing circuit board 200, and a gasket 500 for facilitating a user to press is arranged on the top of the pressure sensitive element 100.

[0037] The above exemplary embodiments are detailed, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, so it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. Onboard pressure sensor, characterized in that, The device comprises a pressure sensitive element (100) and a signal processing circuit board (200), the two being electrically connected, the pressure sensitive element (100) being arranged directly above the signal processing circuit board (200), a first fastener (300) being connected to the outer shell of the pressure sensitive element (100), and a second fastener (400) being connected to the outer shell of the signal processing circuit board (200), the first fastener (300) and the second fastener (400) being stacked and fastened to each other.

2. The onboard pressure sensor according to claim 1, characterized in that: The pressure sensitive element (100) is a capacitive pressure sensitive element (100) in the shape of a rectangular metal film. A conductive rod (110) is arranged at the bottom of the pressure sensitive element (100), and the conductive rod (110) electrically connects the pressure sensitive element (100) and a signal processing circuit board (200).

3. The onboard pressure sensor according to claim 2, characterized in that: A first accommodating cavity (310) is provided in the first fastener (300), and the pressure sensitive element (100) is arranged in the first accommodating cavity (310).

4. The onboard pressure sensor according to claim 3, characterized in that: A first protrusion (320) protruding downward is arranged at the bottom of the first clip (300), and a first groove (410) matching the number of the first protrusions (320) recessed inwardly is arranged on the circumferential surface of the second clip (400), and when the first clip (300) and the second clip (400) are stacked, an interference fit is formed between the first protrusion (320) and the first groove (410).

5. The onboard pressure sensor according to claim 4, characterized in that: The circumferential surface of the first snap fastener (300) is provided with an abutment portion (330), and when the first snap fastener (300) and the second snap fastener (400) are stacked, the first accommodating cavity (310) is formed by wrapping the tops of the first snap fastener (300) and the second snap fastener (400) and the abutment portion (330).

6. The onboard pressure sensor according to claim 2, characterized in that: A second accommodating cavity (420) is provided in the second fastener (400), and the signal processing circuit board (200) is arranged in the second accommodating cavity (420).

7. The onboard pressure sensor according to claim 6, characterized in that: A second protruding block (430) protruding upward is arranged on the top of the second snap fastener (400), and a second groove (340) matching the number of the second protruding blocks (430) recessed inwardly is arranged on the circumferential surface of the first snap fastener (300), and when the first snap fastener (300) and the second snap fastener (400) are stacked, an interference fit is formed between the second protruding block (430) and the second groove (340).

8. The onboard pressure sensor according to any one of claims 1 to 7, characterized in that: A pin (210) for transmitting an electrical signal to the outside is arranged at the bottom of the signal processing circuit board (200).

9. The onboard pressure sensor according to any one of claims 1 to 7, characterized in that: A gasket (500) is arranged on the top of the pressure sensitive element (100).

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