Pressure sensor

Abstract

The utility model discloses a pressure sensor, and relates to the technical field of sensors, the pressure sensor comprises a plug connector, a circuit board, a ground line and a housing, one side of a mounting groove facing the housing is provided with a salient point, and a groove wall is provided with a chamfer at one side of the mounting groove far away from a mounting cavity; the ground line comprises a first section and a second section, the first section is arranged at the mounting groove, the second section is arranged on the outer side of the groove wall, the second section extends from the first section to the side away from the shell in an inclined mode, and the second section is located at the chamfer; when the plug connector is used, before the plug connector and the shell are assembled, the bonding circuit is arranged at the mounting groove, the salient point is pressed on the first section of the bonding circuit, the bonding circuit does not have a right-angle bent part through the design that the chamfer and the second section extend upwards in an inclined mode, and when the bonding circuit is pulled during assembly and press riveting flanging, the bonding circuit is prevented from being damaged. And cracks are not easy to generate.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically a pressure sensor. Background Technology

[0002] A pressure sensor is a device that senses pressure signals and converts them into usable electrical output signals according to a certain rule. It is one of the most commonly used sensors in industrial practice, widely applied in various industrial automation environments, including water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemicals, oil wells, power, shipbuilding, machine tools, pipelines, and many other industries.

[0003] Pressure sensors typically consist of a metal housing and electrical connectors riveted together. Inside the pressure sensor, a flexible PCBA extends one or two lines (hereinafter referred to as ground lines) that connect to the metal housing. The metal housing is then secured to the vehicle frame via threads, thus achieving grounding. This allows the pressure sensor to eliminate electromagnetic interference between the signal and power lines (electromagnetic interference suppression) when operating with the vehicle, improving circuit reliability and stability. The ground lines on the flexible PCBA are bent at near-right angles at the bends (where the connector, ceramic core, and housing meet). When the flexible PCBA is installed onto the housing after soldering, the ground lines generate a tensile force F in the opposite direction (e.g., ...). Figure 1 As shown in the figure, the grounding wire may be pulled and broken during the assembly and riveting process.

[0004] Therefore, there is an urgent need for a pressure sensor to solve the above problems. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model solves the problem using the following technical structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pressure sensor includes: a connector, a circuit board, a ground line, and a housing, wherein the ground line is connected to the circuit board, and one end of the connector is inserted into the housing;

[0008] The connector has an annular groove wall at one end near the housing. The inner side of the groove wall is a mounting cavity. The groove wall has a mounting groove that penetrates through the groove wall at one end near the housing. A protrusion is provided on the side of the mounting groove facing the housing. The groove wall has a chamfer on the side of the mounting groove away from the mounting cavity.

[0009] The circuit board is disposed in the mounting cavity. The grounding line passes through the wall of the mounting groove and extends away from the housing. The grounding line includes a first section and a second section. The first section is placed in the mounting groove, and the second section is disposed on the outside of the groove wall. The second section extends obliquely from the first section away from the housing and is located at the chamfer.

[0010] The protrusions are arc-shaped on both sides, near and far from the mounting cavity.

[0011] The first segment is set horizontally.

[0012] The grounding line also includes a third section, which is disposed in the mounting cavity and connected to the first section. The third section extends from the first section to the side away from the housing and away from the second section. The end of the third section away from the housing is connected to the circuit board.

[0013] The third segment does not contact the protrusion.

[0014] The angle between the third segment and the first segment is greater than 90 degrees.

[0015] The angle between the second segment and the first segment is greater than 90 degrees.

[0016] The grounding line also includes a fourth segment, which is connected to the end of the second segment away from the first segment, and the fourth segment extends from one end of the second segment toward the side away from the housing.

[0017] The angle between the fourth segment and the second segment is greater than 90 degrees.

[0018] The second segment does not contact the protrusion.

[0019] The above-described structure of this utility model can achieve the following beneficial effects:

[0020] When using the device, before assembling the connector with the housing, place the grounding wire in the mounting slot so that the protrusion presses on the first section of the grounding wire. The chamfer and the upward extension of the second section ensure that there are no right-angle bends in the grounding wire. When assembling and riveting the edges, the grounding wire is pulled, which makes it less likely to cause cracks. Attached Figure Description

[0021] Figure 1 This is a schematic cross-sectional view of the structure in this embodiment;

[0022] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0023] Figure 3This is a schematic diagram of the circuit board and grounding line in this embodiment;

[0024] Figure 4 This is a schematic diagram of the connector structure in this embodiment.

[0025] In the diagram: 1. Connector; 11. Slot wall; 12. Mounting slot; 13. Protrusion; 14. Chamfer; 2. Circuit board; 3. Grounding line; 31. First section; 32. Second section; 33. Third section; 34. Fourth section; 4. Housing. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0027] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products or devices.

[0028] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0029] like Figures 1-3 As shown, a pressure sensor includes: a connector 1, a circuit board 2, a ground line 3, and a housing 4. The ground line 3 is connected to the circuit board 2, and one end of the connector 1 is inserted into the housing 4.

[0030] The connector 1 has an annular groove wall 11 at one end near the housing 4. The inner side of the groove wall 11 is a mounting cavity. The groove wall 11 has a mounting groove 12 that penetrates the groove wall 11 at one end near the housing 4. The mounting groove 12 has a protrusion 13 on the side facing the housing 4. The groove wall 11 has a chamfer 14 on the side of the mounting groove 12 away from the mounting cavity.

[0031] The circuit board 2 is disposed in the mounting cavity. The grounding line 3 passes through the groove wall 11 from the mounting groove 12 and extends to the side away from the housing 4. The grounding line 3 includes a first section 31 and a second section 32. The first section 31 is placed in the mounting groove 12, and the second section 32 is disposed on the outside of the groove wall 11. The second section 32 extends obliquely from the first section 31 to the side away from the housing 4. The second section 32 is located at the chamfer 14.

[0032] Based on the above structure, before assembling the connector 1 and the housing 4, the grounding line 3 is placed in the mounting groove 12, so that the protrusion 13 presses on the first section 31 of the grounding line 3. Through the design of the chamfer 14 and the second section extending upward at an angle, the grounding line 3 does not have a right-angle bend. When assembling and riveting the edge, the grounding line 3 is pulled, which does not easily cause cracks.

[0033] like Figure 4 As shown, the two sides of the protrusion 13, near and far from the mounting cavity, are arc-shaped, so that when the grounding line 3 is pulled, the two sides of the protrusion 13 will not cut the grounding line 3.

[0034] like Figures 1-3 As shown, the first segment 31 is horizontally arranged, and the grounding line 3 also includes a third segment 33. The third segment 33 is disposed in the mounting cavity and is connected to the first segment 31. The third segment 33 extends from the first segment 31 to the side away from the housing 4 and away from the second segment 32. The end of the third segment 33 away from the housing 4 is connected to the circuit board 2, so that the third segment 33 and the first segment 31 are connected without a right-angle bend, further reducing the probability of being pulled and torn.

[0035] like Figure 1 and Figure 2 As shown, the second segment 32 does not contact the protrusion 13, and the third segment 33 does not contact the protrusion 13, so that the first segment 31 has an interference design on both sides (there is a gap between the second segment 32 and the third segment 33 and the protrusion 13). When it is pulled by force F, it has upward movement compensation, ensuring that the pulling force generated by the subsequent grounding line 3 does not affect the circuit board 2. Furthermore, the second segment 32 and the first segment 31 and the third segment 33 and the first segment 31 are connected by an arc transition.

[0036] like Figure 2 and Figure 3 As shown, the angle between the third segment 33 and the first segment 31 is greater than 90 degrees; the angle between the second segment 32 and the first segment 31 is greater than 90 degrees. That is to say, the third segment 33 and the second segment 32 extend from one end of the first segment 31 to the side that is far away from each other.

[0037] like Figure 2 and Figure 3As shown, the grounding line 3 also includes a fourth segment 34, which is connected to the end of the second segment 32 away from the first segment 31. The fourth segment 34 extends from one end of the second segment 32 to the side away from the housing 4, and the angle between the fourth segment 34 and the second segment 32 is greater than 90 degrees, which further reduces the probability of the grounding line 3 cracking or breaking when it is subjected to force F.

[0038] In summary, before assembling the connector 1 and the housing 4, the grounding line 3 is placed in the mounting groove 12, so that the protrusion 13 presses on the first section 31 of the grounding line 3. Through the design of the chamfer 14 and the second section extending upward at an angle, the grounding line 3 does not have a right-angle bend. When assembling and riveting the edge, the grounding line 3 is pulled, which is not easy to cause cracks.

[0039] By designing the bump 13 to press on the ground line 3, the bump 13 adopts an arc design, and the second section 32 does not contact the bump 13, and the third section 33 does not contact the bump 13. The first section 31 has an interference design on both sides, which has upward movement compensation when it is pulled by force F, ensuring that the pulling force generated by the subsequent ground line 3 does not affect the circuit board 2.

[0040] This application effectively solves the problem of easy breakage of the grounding line of the circuit board of the original pressure sensor. It avoids the situation where the grounding line will generate a tensile force F in the opposite direction when installing the plug and flexible circuit board into the housing after soldering, and during the flanging and riveting process (or possible rework and secondary assembly), which will cause cracks in the right-angle bend of the grounding line. Even if a tensile force F is generated during subsequent housing installation and flanging and riveting, the grounding line and the circuit board itself can overcome it, thereby improving the product yield and reducing unnecessary product scrap.

[0041] The above are merely preferred embodiments of this application, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations that can be directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A pressure sensor, characterized in that, include: The connector (1), circuit board (2), ground line (3) and housing (4) are provided. The ground line (3) is connected to the circuit board (2). One end of the connector (1) is inserted into the housing (4). The connector (1) has an annular groove wall (11) at one end near the housing (4). The inner side of the groove wall (11) is a mounting cavity. The groove wall (11) has a mounting groove (12) that penetrates the groove wall (11) at one end near the housing (4). The mounting groove (12) has a protrusion (13) on the side facing the housing (4). The groove wall (11) has a chamfer (14) on the side of the mounting groove (12) away from the mounting cavity. The circuit board (2) is disposed in the mounting cavity. The grounding line (3) passes through the groove wall (11) from the mounting groove (12) and extends to the side away from the housing (4). The grounding line (3) includes a first segment (31) and a second segment (32). The first segment (31) is placed in the mounting groove (12). The second segment (32) is disposed on the outside of the groove wall (11). The second segment (32) extends obliquely from the first segment (31) to the side away from the housing (4). The second segment (32) is located at the chamfer (14).

2. The pressure sensor according to claim 1, characterized in that: The protrusion (13) is arc-shaped on both sides near and away from the mounting cavity.

3. The pressure sensor according to claim 2, characterized in that: The first segment (31) is set horizontally.

4. The pressure sensor according to claim 3, characterized in that: The grounding line (3) also includes a third section (33), which is disposed in the mounting cavity. The third section (33) is connected to the first section (31). The third section (33) extends from the first section (31) to the side away from the housing (4) and away from the second section (32). The end of the third section (33) away from the housing (4) is connected to the circuit board (2).

5. The pressure sensor according to claim 4, characterized in that: The third segment (33) does not contact the protrusion (13).

6. The pressure sensor according to claim 4, characterized in that: The angle between the third segment (33) and the first segment (31) is greater than 90 degrees.

7. The pressure sensor according to claim 6, characterized in that: The angle between the second segment (32) and the first segment (31) is greater than 90 degrees.

8. The pressure sensor according to claim 1, characterized in that: The grounding line (3) also includes a fourth segment (34), which is connected to the end of the second segment (32) away from the first segment (31) and extends from one end of the second segment (32) toward the side away from the housing (4).

9. The pressure sensor according to claim 8, characterized in that: The angle between the fourth segment (34) and the second segment (32) is greater than 90 degrees.

10. The pressure sensor according to claim 2, characterized in that: The second segment (32) does not contact the protrusion (13).

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