Micro displacement sensor

Abstract

The utility model discloses a micro-displacement sensor comprising a mounting seat, and the mounting seat is provided with a sliding block, a pressing block and a resistor disc. The sliding block comprises a mounting arm and a sliding part, the pressing block is arranged above the sliding part, and the sliding block can be driven to slide by pressing the pressing block; an electric brush is installed on the installation arm, the resistor disc is arranged below the electric brush, the electric brush makes contact with the resistor disc, and the resistor disc is arranged in the sliding direction of the sliding block. The beneficial effects of the utility model are that the measurement precision and resolution of the displacement sensor are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a micro-displacement sensor. Background Art

[0002] The displacement of an object causes the resistance of the displacement sensor to change, converting the displacement into a visible voltage value, thereby reflecting the magnitude of the displacement. At present, most common displacement sensors on the market are equipped with multiple resistors with different resistance values. By adjusting the resistance conduction and changing the voltage value, the magnitude of the displacement is reflected. However, common displacement sensors have low accuracy and low resolution, and cannot achieve accurate displacement measurement. In order to meet market demand, the future development trend of displacement sensors should be towards high precision and high resolution.

[0003] In view of the above-mentioned deficiencies in the prior art, how to develop a displacement sensor with high precision and high resolution is a technical problem that needs to be solved urgently by technicians in related fields. Utility Model Content

[0004] The utility model aims to provide a micro displacement sensor, which can improve the measurement accuracy and resolution of the displacement sensor.

[0005] The micro displacement sensor is mainly characterized in that it comprises a mounting seat, on which a slider, a pressing block and a resistor are mounted; the slider comprises a mounting arm and a sliding portion, above which the pressing block is arranged, and pressing the pressing block can drive the slider to slide;

[0006] A brush is installed on the installation arm, the resistor is arranged below the brush, and the brush is in contact with the resistor. The resistor is arranged along the sliding direction of the slider.

[0007] When the displacement changes, the utility model presses the pressing block to push the slider to move, and the slider drives the brush to move on the resistor, thereby causing the resistance value to change. The resistance value corresponds to the displacement value one by one. The utility model is connected to a power supply to convert the resistance value into a voltage value, thereby realizing displacement measurement.

[0008] The cross-section of the slider is in an "L"-shaped structure, the long section is the mounting arm, the short section is the sliding part, a first inclined surface is provided on the side of the sliding part close to the pressing block, and a second inclined surface adapted to the first inclined surface is provided on the bottom surface of the pressing block, the second inclined surface is in contact with the first inclined surface, pressing the pressing block, and the first inclined surface drives the second inclined surface, thereby causing the slider to slide.

[0009] Bosses are arranged on both sides of the sliding part of the pressing block which is perpendicular to the sliding direction of the pressing block. The bosses are used for guiding the sliding movement of the pressing block.

[0010] An insulating protective cover is installed above the resistor sheet, and a strip groove is opened on the upper end surface of the insulating protective cover, and the strip groove is consistent with the arrangement direction of the resistor sheet;

[0011] The brush extends into the strip groove and contacts the resistor, and the slider drives the brush to move along the strip groove.

[0012] The resistor sheet is also provided with a lead wire, which extends to the outside of the insulating protection cover.

[0013] In the utility model, the slider drives the brush to move along the strip groove on the resistor sheet, and the output resistance value of the resistor sheet changes with the displacement value. The utility model is connected to a power supply to convert a small resistance value into a voltage value, thereby improving the accuracy and resolution of displacement measurement.

[0014] The cross section of the mounting seat is in a "convex" shape, and a slider mounting cavity and a pressing block mounting cavity are arranged side by side on the protruding part of the mounting seat along the moving direction of the slider, and vertical upward pressing sliding grooves are opened on both sides of the sliding part of the pressing block mounting cavity perpendicular to its sliding direction; the slider and the pressing block are respectively installed in the slider mounting cavity and the pressing block mounting cavity, and the boss is adapted to the pressing sliding groove;

[0015] A return spring is installed between the inner side wall of the slider installation cavity away from the pressing block installation cavity and the slider, and the return spring is connected to the connection between the installation arm and the sliding part.

[0016] After the displacement measurement is completed, the return spring will reset the slider and the pressing block through elastic force.

[0017] A cover plate is installed above the slider installation cavity and the pressing block installation cavity, a pressing block limiting hole is opened on the cover plate just above the pressing block installation cavity, the pressing block is installed in the pressing block limiting hole, and the upper part of the pressing block is located outside the pressing block limiting hole.

[0018] The pressing block limiting hole can limit the pressing block and prevent the pressing block from shaking left and right, thereby improving the displacement measurement accuracy.

[0019] A square opening is reserved at the connection between the mounting seat and the side surface of the cover plate; the mounting arm passes through the directional opening and is connected to the brush.

[0020] Beneficial effects: The utility model improves the measurement accuracy and resolution of the displacement sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the utility model;

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

[0023] Figure 3 This is a schematic diagram of the mounting base;

[0024] Figure 4 It is a schematic diagram of a slider;

[0025] Figure 5 It is a schematic diagram of the pressing block;

[0026] Figure 6 Schematic diagram of resistor assembly. DETAILED DESCRIPTION

[0027] The specific implementation manner and working principle of the utility model are further described in detail below with reference to the accompanying drawings.

[0028] like Figure 1 , Figure 2 , Figure 3 As shown, the micro displacement sensor comprises a mounting seat 1, a cover plate 2, a slider 3, a pressing block 4, a resistor 5, a brush 6 and a reset spring 7; the mounting seat 1 has a "convex" shaped structure in cross section, and a slider mounting cavity 11 and a pressing block mounting cavity 12 are arranged side by side along the moving direction of the slider 3 on the protruding part of the mounting seat 1, and the pressing block mounting cavity 12 has vertically upward pressing sliding grooves 13 on both sides of the sliding portion 32 perpendicular to its sliding direction; the slider 3 and the pressing block 4 are respectively mounted in the slider mounting cavity 11 and the pressing block mounting cavity 12; a reset spring 7 is installed between the inner side wall of the slider mounting cavity 11 away from the pressing block mounting cavity 12 and the slider 3; the resistor 5 is installed outside the slider mounting cavity 11 and the pressing block mounting cavity 12.

[0029] A cover plate 2 is installed above the slider installation cavity 11 and the pressing block installation cavity 12. A pressing block limiting hole 21 is opened on the cover plate 2 directly above the pressing block installation cavity 12. The pressing block 4 is installed in the pressing block limiting hole 21, and the upper part of the pressing block 4 is located outside the pressing block limiting hole 21.

[0030] A square opening 22 is left at the connection between the mounting seat 1 and the side of the cover plate 2 .

[0031] like Figure 1 , Figure 2 , Figure 4As shown, the cross section of the slider 3 is an "L"-shaped structure, the long section of which is the mounting arm 31, and the short section is the sliding portion 32. The mounting arm 31 and the sliding portion 32 are vertically connected, and the reset spring 7 is connected to the connection between the mounting arm 31 and the sliding portion 32; the mounting arm 31 passes through the direction opening 22 and is connected to the brush 6; the resistor 5 is arranged below the brush 6 along the sliding direction of the slider 3, and the brush 6 is in contact with the resistor 5.

[0032] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, the pressing block 4 is arranged above the sliding part 32, and a first inclined surface 321 is arranged on the side of the sliding part 32 close to the pressing block 4, and a second inclined surface 41 adapted to the first inclined surface 321 is arranged on the bottom surface of the pressing block 4, and the second inclined surface 41 is in contact with the first inclined surface 321; when the displacement changes, the pressing block 4 is pressed, and at this time, the first inclined surface 321 drives the second inclined surface 41, thereby causing the slider 3 to slide.

[0033] like Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, bosses 42 are provided on both side surfaces of the sliding portion 32 of the pressing block 4 which is perpendicular to its sliding direction. The bosses 42 are adapted to the pressing sliding grooves 13. The bosses 42 are used to guide the sliding of the pressing block 4. The pressing sliding grooves 13 are used to determine the up and down sliding height of the pressing block 4.

[0034] like Figure 1 , Figure 2 , Figure 6 As shown, an insulating protective cover 51 is installed above the resistor 5, and a strip groove 511 is opened on the upper end surface of the insulating protective cover 51, and the strip groove 511 is consistent with the arrangement direction of the resistor 5; a lead wire 52 is also installed on the resistor 5, and the lead wire 52 extends to the outside of the insulating protective cover 51.

[0035] like Figure 1 , Figure 2 , Figure 6 As shown, the brush 6 is arranged in the insulation protection shell 51 , the lower end surface of the brush 6 contacts the resistor 5 , and the upper end of the brush 6 passes through the strip groove 511 and is connected to the slider 3 .

[0036] In the utility model, when the displacement changes, the pressing block 4 moves downward to drive the slider 3 to slide, and the slider 3 drives the brush 6 to move along the strip groove 511 on the resistor sheet 5 to obtain a resistance value corresponding to the displacement value.

Claims

1. A micro displacement sensor, characterized in that: The invention comprises a mounting seat (1), on which a slider (3), a pressing block (4) and a resistor (5) are mounted; the slider (3) comprises a mounting arm (31) and a sliding portion (32), the pressing block (4) is arranged above the sliding portion (32), and pressing the pressing block (4) can drive the slider (3) to slide; A brush (6) is installed on the mounting arm (31), the resistor (5) is arranged below the brush (6), and the brush (6) is in contact with the resistor (5), and the resistor (5) is arranged along the sliding direction of the slider (3).

2. The micro displacement sensor according to claim 1, characterized in that: The cross section of the slider (3) is in an "L"-shaped structure, wherein the long section is the mounting arm (31) and the short section is the sliding portion (32). A first inclined surface (321) is provided on a side of the sliding portion (32) close to the pressing block (4), and a second inclined surface (41) adapted to the first inclined surface (321) is provided on the bottom surface of the pressing block (4). The second inclined surface (41) is in contact with the first inclined surface (321), and when the pressing block (4) is pressed, the first inclined surface (321) drives the second inclined surface (41), thereby causing the slider (3) to slide.

3. The micro-displacement sensor according to claim 2, characterized in that: Bosses (42) are provided on both side surfaces of the pressing block (4) which are perpendicular to the sliding direction of the sliding part (32), and the bosses (42) are used for sliding guide of the pressing block (4).

4. The micro displacement sensor according to claim 1, characterized in that: An insulating protective cover (51) is installed above the resistor (5), and a strip groove (511) is formed on the upper end surface of the insulating protective cover (51), and the strip groove (511) is arranged in the same direction as the resistor (5); The brush (6) extends into the strip groove (511) and contacts the resistor (5), and the slider (3) drives the brush (6) to move along the strip groove (511).

5. The micro displacement sensor according to claim 4, characterized in that: A lead wire (52) is also installed on the resistor sheet (5), and the lead wire (52) extends outside the insulating protection cover (51).

6. The micro displacement sensor according to claim 3, characterized in that: The cross section of the mounting seat (1) is in the shape of a "convex" character. A slider mounting cavity (11) and a pressing block mounting cavity (12) are arranged side by side on the protruding portion of the mounting seat (1) along the moving direction of the slider (3). The pressing block mounting cavity (12) has vertically upward pressing sliding grooves (13) on both sides perpendicular to the sliding direction of the sliding portion (32). The slider (3) and the pressing block (4) are respectively mounted in the slider mounting cavity (11) and the pressing block mounting cavity (12), and the boss (42) is adapted to the pressing sliding groove (13). A return spring (7) is installed between the inner wall of the slider installation cavity (11) away from the pressing block installation cavity (12) and the slider (3), and the return spring (7) is connected to the connection between the installation arm (31) and the sliding part (32).

7. The micro displacement sensor according to claim 6, characterized in that: A cover plate (2) is installed above the slider installation cavity (11) and the pressing block installation cavity (12); a pressing block limiting hole (21) is opened on the cover plate (2) directly above the pressing block installation cavity (12); the pressing block (4) is installed in the pressing block limiting hole (21), and the upper part of the pressing block (4) is located outside the pressing block limiting hole (21).

8. The micro-displacement sensor according to claim 7, characterized in that: A square opening (22) is left at the connection between the mounting seat (1) and the side of the cover plate (2); the mounting arm (31) passes through the square opening (22) and is connected to the brush (6).

Images