High-sensitivity miniature pressure sensor

Abstract

The utility model discloses a high-sensitivity miniature pressure sensor which comprises a sensor body, a detection head is arranged at the top of the sensor body, a pressing plate is assembled at the top end of the detection head, four limiting rods are evenly and fixedly connected to the bottom face of the pressing plate, and limiting holes corresponding to the limiting rods are formed in the top face of the sensor body. The limiting rod is movably connected with the limiting hole; the side wall of the sensor main body is fixedly connected with a wire, the side wall of the sensor main body is fixedly connected with a sleeve at the position of the wire, and the side wall of the sleeve is provided with a locking assembly. Therefore, the sensitivity of the sensor body is effectively improved and the reliability of pressure data is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pressure sensor technical field, concretely relates to a high sensitivity miniature pressure sensor. BACKGROUND

[0002] Miniature pressure sensors are sensors used to measure small pressure changes and are widely used in medical, industrial, automotive, consumer electronics, and aerospace fields. They are usually used to detect changes in the pressure of gases or liquids and convert these changes into electrical signals.

[0003] In the prior art, if the force position is not at the center position or the force position is offset during use, the sensor output signal data may not be accurate, resulting in poor sensor sensitivity. In addition, the wires on the sensor are also susceptible to external electromagnetic signals or static electricity and other factors, causing inaccurate data transmission.

[0004] Therefore, a high-sensitivity miniature pressure sensor is designed to overcome the above technical defects. UTILITY MODEL CONTENTS

[0005] (1) Technical problem to be solved

[0006] To overcome the shortcomings of the prior art, the utility model aims to provide a high-sensitivity miniature pressure sensor that can maintain stable pressure signal data transmission and prevent uneven force from causing inaccurate data.

[0007] (2) Technical solution

[0008] To solve the above technical problems, the utility model provides a high-sensitivity miniature pressure sensor, which includes a sensor body, a detection head is arranged on the top of the sensor body, a pressure plate is assembled on the top end of the detection head, four limiting rods are uniformly fixed and connected to the bottom surface of the pressure plate, limiting holes corresponding to the limiting rods are opened on the top surface of the sensor body, and the limiting rods are movably connected with the limiting holes.

[0009] A wire is fixedly connected to the side wall of the sensor body, a sleeve is fixedly connected to the wire position of the side wall of the sensor body, and a locking assembly is arranged on the side wall of the sleeve.

[0010] Further, a plurality of rows of balls are uniformly rotatably connected to the side wall of the limiting rod, vertical grooves adapted to the balls are opened on the side wall of the limiting hole, and the vertical grooves penetrate through the top of the sensor body.

[0011] As further, the locking assembly includes a plurality of clamping plates fixedly connected to the sleeve end face, the clamping plate is a trapezoidal structure, the sleeve side wall is threadedly connected with a sleeve, the sleeve is a tapered structure, the sleeve is abutted with the clamping plate side wall, and the sleeve end face is provided with an anti-interference assembly.

[0012] As further, the plurality of clamping plates are inclined towards the sleeve center side.

[0013] As further, the anti-interference assembly includes a receiving ring rotatably connected to the sleeve end face, the receiving ring is woundly connected with a metal wire, and the metal wire is woundly connected with the wire.

[0014] As further, the sleeve side wall is fixedly connected with an anti-skid sleeve, and the anti-skid sleeve is provided with anti-skid lines.

[0015] As further, the pressing plate top surface is provided with a counterbore, the counterbore is provided with a screw, and the screw is threadedly connected with the detection head.

[0016] As further, the pressing plate bottom surface is fixedly connected with an annular magnetic sheet.

[0017] (3) beneficial effects

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The utility model discloses a sensor main body, pressing plate, limit rod and limit hole's design, when the pressing plate surface or edge position is forced, utilizes the limit of limit rod, makes the pressing plate can synchronous downward displacement, cooperates the ball and can further reduce the friction, thereby effectively promotes the sensitivity of sensor main body, guarantees the reliability of pressure data.

[0020] The utility model discloses a sensor main body, wire, sleeve, locking assembly and anti-interference assembly etc. between the mutual cooperation, utilizes locking assembly and can keep the connection stability between wire and sensor main body, and simultaneously cooperates the effect of metal wire and is convenient for static electricity to flow to the ground, can also provide certain electromagnetic shielding effect, reduces the influence of external electromagnetic interference to wire, guarantees the stability of pressure data transmission. ACCURACY

[0021] Figure 1 It is the perspective drawing of the utility model;

[0022] Figure 2 It is the sectional view of the utility model;

[0023] Figure 3 It is the structure schematic view of the pressing plate of the utility model;

[0024] Figure 4 It is the bottom structure schematic view of the pressing plate of the utility model;

[0025] Figure 5 It is a perspective view of the locking assembly of the utility model;

[0026] Figure 6 It is a sectional view of the locking assembly of the utility model;

[0027] Figure 7 It is a structural schematic view of the sleeve of the utility model;

[0028] Figure 8 It is an enlarged view of A in the utility model Figure 2 .

[0029] The marks in the drawing are: 1, sensor main body; 2, detection head; 3, pressing plate; 4, limiting rod; 5, limiting hole; 6, ball; 7, vertical groove; 8, wire; 9, sleeve; 10, clamping plate; 11, screw sleeve; 12, storage ring; 13, metal wire; 14, anti-skid sleeve; 15, screw; 16, annular magnetic sheet; 17, counterbore. DETAILED DESCRIPTION

[0030] The present detailed embodiment is a high-sensitivity miniature pressure sensor, and a structural schematic view thereof is shown in Figures 1-8 , which comprises a sensor main body 1, the sensor main body 1 is provided with a detection head 2 at the top, the detection head 2 is assembled with a pressing plate 3 at the top end, the pressing plate 3 is uniformly fixedly connected with four limiting rods 4 at the bottom surface, the sensor main body 1 is provided with limiting holes 5 corresponding to the limiting rods 4 at the top surface, and the limiting rods 4 are movably connected with the limiting holes 5.

[0031] The sensor main body 1 is fixedly connected with a wire 8 at the side wall, the sensor main body 1 is fixedly connected with a sleeve 9 at the side wall at the position of the wire 8, and the sleeve 9 is provided with a locking assembly at the side wall.

[0032] Specifically, the sensor main body 1 preferably adopts an EVT-14R miniature plane force sensor, the principle and structure thereof belong to the prior art, and will not be described in detail in the present scheme.

[0033] As shown in Figure 2 and Figure 8 , a plurality of rows of balls 6 are uniformly rotatably connected with the side wall of the limiting rod 4, the vertical grooves 7 matched with the balls 6 are formed in the side wall of the limiting hole 5, and the vertical grooves 7 penetrate through the top of the sensor main body 1.

[0034] When the surface center position of the pressing plate 3 is stressed or the edge position is stressed, the limiting action of the balls 6 can make the whole pressing plate 3 press down, so that the detection head 3 is pressed to be in a normal state, so as to facilitate the transmission of stable and accurate pressure signals, and by arranging the limiting rods 4 at the four wire laying positions, the force can be effectively transmitted at any position on the surface of the pressing plate 3.

[0035] AsFigure 1 、 Figure 5 and Figure 6 As shown in the figure, the locking assembly includes a plurality of clamping plates 10 fixedly connected to the end face of the sleeve 9. The clamping plates 10 are trapezoidal in structure. The sleeve 9 has a threaded sleeve 11 threadedly connected to the side wall thereof. The threaded sleeve 11 is conical in structure. The threaded sleeve 11 abuts against the side wall of the clamping plate 10. The end face of the threaded sleeve 11 is provided with an anti-interference assembly.

[0036] The plurality of clamping plates 10 are inclined toward one side of the center of the sleeve 9.

[0037] After the sensor body 1 is installed, the threaded sleeve 11 can be tightened to press the clamping plates 10 by using the inclined surface of the threaded sleeve 11. Thus, the wire 8 can be fixed to avoid friction between the wire 8 and the sensor body 1 caused by pulling, resulting in poor contact or wear and tear, thereby improving the service life of the wire 8.

[0038] As shown in the figure, Figure 5 the anti-interference assembly includes a receiving ring 12 rotatably connected to the end face of the threaded sleeve 11. The receiving ring 12 is woundly connected with a metal wire 13. The metal wire 13 is woundly connected with the wire 8.

[0039] Specifically, the material of the metal wire 13 is preferably aluminum and copper, which has excellent conductivity effect. While conducting static electricity, it can also have an anti-interference effect. In addition, it is necessary to ensure that the metal wire 13 is tightly wound on the wire 8 to form a good electrical connection. If the winding is not tight enough, it may affect the conduction effect of static electricity. The most critical thing is to reliably ground the metal wire 13. Only when the metal wire 13 is connected to an effective grounding system, can the static charge be effectively guided to the ground, thereby reducing the accumulation of static electricity.

[0040] As shown in the figure, Figure 5 the side wall of the threaded sleeve 11 is fixedly connected with an anti-skid sleeve 14. The anti-skid sleeve 14 is provided with anti-skid lines. When tightening the threaded sleeve 11, the friction between the hand and the anti-skid sleeve 14 can be increased, and the stress level is better.

[0041] As shown in the figure, Figures 2-4 the top surface of the pressing plate 3 is provided with a counterbore 17. The counterbore 17 is provided with a screw 15. The screw 15 is threadedly connected with the detection head 2.

[0042] After the pressing plate 3 is screwed on the detection head 2 by the screw 15, the surface of the screw 15 is lower than the surface of the pressing plate 3. The counterbore 17 receives the screw 15, so that when an object contacts the pressing plate 3, the problem of unstable stress or unstable placement caused by the screw 15 can be avoided.

[0043] As shown in the figure, Figure 4As shown, the bottom surface of the pressing plate 3 is fixedly connected with a ring-shaped magnetic sheet 16.

[0044] Working principle: when the sensor main body 1 is installed and used, the pressing plate 2 is fixed on the detection head 2 through the screw 15, and the limiting rod 4 is inserted into the limiting hole 5, so that the ball 6 is attached to the vertical groove 7, for reducing the friction force; when the wire 8 is arranged, the screw sleeve 11 is rotated to move, the inclined surface of the screw sleeve 11 is used to press the clamping plate 10, the clamping plate 10 is folded to the side of the wire 8 under the pressure, for fixing the wire 8 and reducing the bending wear of the wire 8; then the metal wire 13 is tightly wound on the surface of the wire 8, and the other end of the metal wire 13 is grounded, for conducting electrostatic current and ensuring the stability of the pressure data transmission.

[0045] All the technical features in the embodiment can be freely combined according to actual needs.

[0046] The above embodiment is a preferred implementation scheme of the utility model, in addition, the utility model can be realized in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the utility model.

Claims

1. A high-sensitivity micro pressure sensor comprising a sensor body (1), characterized in that: The sensor body (1) top is provided with detection head (2), the detection head (2) top is equipped with pressing plate (3), the pressing plate (3) bottom surface is uniformly connected with four limit rods (4), the sensor body (1) top surface is provided with the limit hole (5) corresponding with limit rod (4), the limit rod (4) is movably connected with limit hole (5). The sensor body (1) side wall is fixedly connected with a wire (8), and the sensor body (1) side wall is fixedly connected with a sleeve (9) at the position of the wire (8). The sleeve (9) side wall is provided with a locking assembly.

2. The high sensitivity micro pressure sensor according to claim 1, characterized in that: The limit rod (4) side wall is uniformly rotatably connected with a plurality of rows of balls (6), the limit hole (5) side wall is provided with a vertical groove (7) matched with the ball (6), and the vertical groove (7) penetrates the top of the sensor body (1).

3. The high sensitivity micro pressure sensor according to claim 1, wherein: The locking assembly comprises a plurality of clamping plates (10) fixedly connected to the end face of the sleeve (9), the clamping plate (10) is a trapezoidal structure, the sleeve (9) side wall is threadedly connected with a sleeve nut (11), the sleeve nut (11) is a conical structure, the sleeve nut (11) abuts against the side wall of the clamping plate (10), and the sleeve nut (11) end face is provided with an anti-interference assembly.

4. The high sensitivity micro pressure sensor according to claim 3, characterized in that: A plurality of clamping plates (10) are inclined towards the center of the sleeve (9).

5. The high sensitivity micro pressure sensor according to claim 3, wherein: The anti-interference assembly comprises a receiving ring (12) rotatably connected to the end face of the sleeve nut (11), the receiving ring (12) is wound with a metal wire (13), and the metal wire (13) is wound with the wire (8).

6. The high sensitivity micro pressure sensor according to claim 3, wherein: The sleeve nut (11) side wall is fixedly connected with an anti-skid sleeve (14), and the anti-skid sleeve (14) is provided with anti-skid lines.

7. The high sensitivity micro pressure sensor according to claim 1, wherein: The pressing plate (3) top surface is provided with a counterbore (17), the counterbore (17) is provided with a screw (15), and the screw (15) is threadedly connected with the detection head (2).

8. The high sensitivity micro pressure sensor of claim 1, wherein: The pressing plate (3) bottom surface is fixedly connected with an annular magnetic sheet (16).

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