Non-contact potentiometer

Abstract

The utility model provides a kind of non-contact potentiometer, including pivot, shaft sleeve, PCB board with sensing chip, magnet, assembly support, first limit block, second limit block, shell;The first limit block cover is arranged on the upper surface of the shell to form assembly space;PCB board is installed in the bottom of the assembly space, and the terminal of the assembly space extends out of the shell;The assembly support is arranged in the assembly space, and the upper surface of the assembly support is integrally formed with limit seat, the bottom of the assembly support is provided with second limit block embedding groove, the second limit block is correspondingly embedded in the second limit block embedding groove and is interference fit with the second limit block embedding groove, the bottom of the second limit block is provided with magnet storage groove, the magnet is correspondingly embedded in the magnet storage groove and is interference fit with the magnet storage groove, and the magnet and the sensing chip of the PCB board form gap;It is convenient to assemble, and good sealing.

Description

TECHNICAL FIELD

[0001] The utility model relates to potentiometer technical field, concretely relates to a non-contact potentiometer. BACKGROUND

[0002] China authorized announcement number CN203260444U, authorized announcement day is October 30, 2013, and the utility model name is a kind of non-contact potentiometer.The non-contact potentiometer includes following several parts: the mechanical shell with hole;Rotating rod, including top end and the magnet end fixed with permanent magnet, top end can accept external torque action, drive rotating rod and permanent magnet relative to shell rotation around rotating shaft;Relative to the fixed reluctance sensor assembly of the shell, including one or more sensor chips, the sensitivity axis of sensor chip on induction plane is perpendicular to the rotating shaft, and there is a predetermined distance between permanent magnet and rotating shaft direction, for sensing the magnetic field change of permanent magnet rotation around rotating shaft and generating induction signal;And 3 electrical connection terminals, respectively ground, power terminal and signal output terminal.The non-contact potentiometer has the advantages of good precision performance, small power loss and low cost, and can faster, easier complex analog signal with magnetic field information is converted into standard digital signal.The defects of the prior art are: it is inconvenient to assemble with panel, sealing degree needs to be improved, and it is not suitable for relatively harsh use environment.In view of this situation, it is urgent to improve. SUMMARY

[0003] In view of the above problems, the utility model provides a kind of non-contact potentiometer, it is convenient to assemble, and good sealing.

[0004] To achieve the above object, the utility model solves by following technical scheme: a kind of non-contact potentiometer, including rotating shaft, shaft sleeve, PCB board with sensing chip, magnet, assembly support, first limit block, second limit block, shell;The first limit block cover is set on the upper surface of the shell to form assembly space;PCB board is installed at the bottom of the assembly space, and the terminal of the assembly space extends outside the shell;The assembly support is arranged in the assembly space, the upper surface of the assembly support is integrally formed with limit seat, the bottom of the assembly support is provided with the second limit block embedding groove, the second limit block is correspondingly embedded in the second limit block embedding groove and is in interference fit with the second limit block embedding groove, the bottom of the second limit block is provided with the magnet storage groove, the magnet is correspondingly embedded in the magnet storage groove and is in interference fit with the magnet storage groove, and the gap is formed between the magnet and the sensing chip of the PCB board;The limit seat penetrates the first limit block and extends out of the upper surface of the first limit block;Flat hole for inserting the rotating shaft is formed in the limit seat;The bottom of the rotating shaft is integrally formed with the flat-shaped plug corresponding to the flat hole, and the flat-shaped plug is in interference fit with the flat hole.

[0005] The upper surface of the shaft sleeve is formed with a threaded sleeve pipe, the threaded sleeve pipe is coaxial with the rotating shaft, the flat hole, the magnet and the induction chip, the rotating shaft penetrates through the threaded sleeve pipe and is inserted into the flat hole, and the outer side surface of the threaded sleeve pipe is formed with external threads matched with the equipment mounting panel;

[0006] The upper portion of the rotating shaft is formed with a limiting convex ring in contact with the upper surface of the threaded sleeve pipe;

[0007] The opposite sides of the outer side surface of the first limiting block are provided with limiting clamping grooves, and the opposite sides of the lower surface of the shaft sleeve are provided with insertion pins inserted into the limiting clamping grooves;

[0008] One side of the lower surface of the assembly support is integrally formed with a stop block matched with the limiting convex platform.

[0009] Preferably, the flat hole is communicated with the second limiting block embedding groove.

[0010] Preferably, the opposite sides of the upper surface of the assembly support are provided with supporting convex columns.

[0011] Preferably, the assembly support is provided with a plurality of reinforcing ribs formed on the outer side surface of the second limiting block embedding groove.

[0012] Preferably, the upper surface of the shell is circumferentially formed with a plurality of buckling blocks, and the buckling blocks are in contact with the shaft sleeve when in the assembled state.

[0013] Preferably, the induction chip is a Hall chip or a TMR chip.

[0014] Preferably, the opposite sides of the second limiting block embedding groove are formed with positioning clamping grooves, and the opposite sides of the second limiting block are formed with positioning convex blocks matched with the positioning clamping grooves.

[0015] Preferably, one side of the PCB is formed with a yielding slot corresponding to the limiting convex platform.

[0016] The utility model discloses a potentiometer, which comprises a shell, a rotating shaft, a first limiting block, a second limiting block, a magnet, an induction chip and a PCB board. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is an exploded view of the utility model.

[0018] Figure 2 is a perspective view of the utility model.

[0019] Figure 3 is a sectional view (first visual) of the utility model.

[0020] Figure 4 is a sectional view (second visual) of the utility model.

[0021] The figure mark is: pivot 10, flat insert block 11, shaft sleeve 12, threaded sleeve 13, first limit block 14, limit clamping groove 15, limit seat 16, assembly support 17, support convex column 18, reinforcing rib 19, stop block 20, second limit block 21, positioning convex block 22, PCB board 24, magnet 23, shell 25, limit convex platform 26, fastening block 27, give way slot 28, bolt 29, limit convex ring 30, flat hole 31, induction chip 32. Specific implementation

[0022] The utility model will be described further in detail below in combination with examples and drawings, but the implementation of the utility model is not limited to this.

[0023] Referring to Figures 1-4 The figure mark is: pivot 10, flat insert block 11, shaft sleeve 12, threaded sleeve 13, first limit block 14, limit clamping groove 15, limit seat 16, assembly support 17, support convex column 18, reinforcing rib 19, stop block 20, second limit block 21, positioning convex block 22, PCB board 24, magnet 23, shell 25, limit convex platform 26, fastening block 27, give way slot 28, bolt 29, limit convex ring 30, flat hole 31, induction chip 32.

[0024] Assembly support 17 is arranged in the assembly space, and the upper surface of assembly support 17 is integrally formed with limit seat 16; the bottom of assembly support 17 is provided with a second limit block fitting groove, and the second limit block 21 is correspondingly fitted in the second limit block fitting groove and is in interference fit with the second limit block fitting groove; the bottom of second limit block 21 is provided with a magnet storage groove, and the magnet 23 is correspondingly fitted in the magnet storage groove and is in interference fit with the magnet storage groove, so that a gap is formed between the magnet 23 and the induction chip of the PCB board 24; limit seat 16 penetrates through first limit block 14 and extends out of the upper surface of first limit block 14, and limit seat 16 is in clearance fit with the through hole on first limit block 14; a flat hole 31 for inserting pivot 10 is formed in limit seat 16; the bottom of pivot 10 is integrally formed with a flat insert block 11 corresponding to flat hole 31, and flat insert block 11 is in interference fit with flat hole 31; flat hole 31 is in communication with the second limit block fitting groove.

[0025] The shaft sleeve 12 corresponds to the cover is arranged on the upper surface of the first limiting block 14 and is in abutting contact with the first limiting block 14, the upper surface of the shaft sleeve 12 is formed with a threaded sleeve 13, the threaded sleeve 13 is coaxially arranged with the rotating shaft 10, the flat hole 31, the magnet 23 and the induction chip 32; the rotating shaft 10 penetrates through the threaded sleeve 13 and is correspondingly inserted into the flat hole 31; the outer side surface of the threaded sleeve 13 is formed with external threads matched with the equipment mounting panel. The rotating shaft 10 is in clearance fit with the inner cavity of the threaded sleeve 13. The upper surface of the limiting seat 16 is in abutting contact with the bottom of the shaft sleeve 12.

[0026] The upper portion of the rotating shaft 10 is formed with a limiting convex ring 30 in abutting contact with the upper surface of the threaded sleeve 13, the shaft sleeve 12 is limited by the limiting convex ring 30, and the assembly precision is ensured.

[0027] The outer side surface of the first limiting block 14 is provided with limiting clamping grooves 15 on opposite sides, the lower surface of the shaft sleeve 12 is provided with insertion pins 29 inserted into the limiting clamping grooves 15 on opposite sides, and the shaft sleeve 12 and the first limiting block 14 are quickly and accurately positioned during assembly through the cooperation of the limiting clamping grooves 15 and the insertion pins 29, so that the assembly efficiency and precision are improved.

[0028] The bottom side of the shell 25 is provided with a limiting convex platform 26, and one side of the lower surface of the assembly support 17 is integrally formed with a stop block 20 matched with the limiting convex platform 26.

[0029] Preferably, the upper surface of the assembly support 17 is provided with support convex columns 18 on opposite sides, which are used to limit the assembly interval between the assembly support 17 and the first limiting block 14 during assembly.

[0030] Preferably, the assembly support 17 is provided with a plurality of reinforcing ribs 19 formed on the outer side surface of the second limiting block embedding groove in a circumferential direction, so as to improve the overall strength of the assembly support 17.

[0031] Preferably, the upper surface of the shell 25 is circumferentially formed with a plurality of buckling blocks 27, which are in abutting contact with the shaft sleeve 12 when in an assembled state. The shaft sleeve 12 is buckled and fixed by the buckling blocks 27, so as to facilitate assembly and formation.

[0032] Preferably, the induction chip 32 is a Hall chip or a TMR chip.

[0033] Preferably, the opposite sides of the second limiting block embedding groove are formed with positioning clamping grooves, and the opposite sides of the second limiting block 21 are formed with positioning convex blocks 22 matched with the positioning clamping grooves, so that the second limiting block 21 can be quickly and accurately installed in the second limiting block embedding groove, the assembly efficiency is improved, and the assembly precision is also ensured.

[0034] Preferably, one side of the PCB 24 is formed with a let go slot 28 corresponding to the position of the limiting boss 26, which on the one hand lets go of the limiting boss 26, and on the other hand prevents the PCB 24 from displacement.

[0035] In the actual operation, the structure is fixedly installed with the equipment mounting panel through the threaded sleeve, the rotating shaft 10 is rotated, the rotating shaft 10 drives the assembly support 17 to rotate, the assembly support 17 synchronously drives the magnet 23 to change the position relative to the induction chip 32, and the induction chip 32 senses the magnetic field change of the magnet 23 to generate an induction signal.

[0036] By setting the assembly support, the first limiting block, the second limiting block and the cooperation structure of the shell, the sealing property of the whole potentiometer is directly improved, the potentiometer has good anti-vibration, dust, oil stain, water vapor and salt fog prevention functions, and is suitable for some relatively harsh use environments; the outer side of the threaded sleeve is formed with external threads matched with the equipment mounting panel, in the actual use, the threaded sleeve is connected with the mounting panel through the threads, so that the potentiometer is fixed, and the potentiometer is convenient to assemble.

[0037] The above embodiment only expresses one embodiment of the utility model, and the description is relatively specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a plurality of modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A non-contact potentiometer characterized by, The application relates to a rotating shaft (10), a shaft sleeve (12), a PCB board (24) with an induction chip (32), a magnet (23), an assembling support (17), a first limiting block (14), a second limiting block (21) and a shell (25). The first limiting block (14) is arranged on the upper surface of the shell (25) to form an assembling space; the PCB board (24) is arranged at the bottom of the assembling space, and the terminal of the assembling space extends out of the shell (25); The assembling support (17) is arranged in the assembling space, the upper surface of the assembling support (17) is integrally formed with a limiting seat (16), the bottom of the assembling support (17) is provided with a second limiting block embedding groove, the second limiting block (21) is correspondingly arranged in the second limiting block embedding groove and is in interference fit with the second limiting block embedding groove, the bottom of the second limiting block (21) is provided with a magnet receiving groove, the magnet (23) is correspondingly arranged in the magnet receiving groove and is in interference fit with the magnet receiving groove, and a gap is formed between the magnet (23) and the induction chip of the PCB board (24); the limiting seat (16) penetrates through the first limiting block (14) and extends out of the upper surface of the first limiting block (14); the limiting seat (16) is provided with a flat hole (31) for inserting the rotating shaft (10); the bottom of the rotating shaft (10) is integrally formed with a flat inserting block (11) corresponding to the flat hole (31), and the flat inserting block (11) is in interference fit with the flat hole (31); The shaft sleeve (12) is correspondingly arranged on the upper surface of the first limiting block (14) and is in abutting contact with the first limiting block (14), the upper surface of the shaft sleeve (12) is formed with a threaded sleeve (13), the threaded sleeve (13) is coaxially arranged with the rotating shaft (10), the flat hole (31), the magnet (23) and the induction chip (32); the rotating shaft (10) penetrates through the threaded sleeve (13) and is correspondingly inserted into the flat hole (31); the outer side surface of the threaded sleeve (13) is formed with external threads matched with the equipment mounting panel; The upper portion of the rotating shaft (10) is formed with a limiting convex ring (30) in abutting contact with the upper surface of the threaded sleeve (13); The opposite sides of the outer side surface of the first limiting block (14) are provided with limiting clamping grooves (15), and the lower surface of the shaft sleeve (12) is provided with corresponding bolts (29) inserted into the limiting clamping grooves (15); One side of the bottom of the shell (25) is provided with a limiting convex platform (26), and one side of the lower surface of the assembling support (17) is integrally formed with a stop block (20) matched with the limiting convex platform (26).

2. A non-contact potentiometer according to claim 1, wherein The flat hole (31) is communicated with the second limiting block embedding groove.

3. A non-contact potentiometer according to claim 1, wherein The opposite sides of the upper surface of the assembling support (17) are provided with supporting convex columns (18).

4. A non-contact potentiometer according to claim 1, wherein The outer side surface of the assembling support (17) located outside the second limiting block embedding groove is circumferentially formed with a plurality of reinforcing ribs (19).

5. A non-contact potentiometer according to claim 1, wherein The upper surface of the shell (25) is circumferentially formed with several buckling blocks (27), which are in abutting contact with the shaft sleeve (12) when in an assembled state.

6. A non-contact potentiometer according to claim 1, wherein The inductive chip (32) is a Hall chip or a TMR chip.

7. A non-contact potentiometer according to claim 1, wherein Opposite sides of the second limiting block fitting groove are formed with positioning clamping grooves, and opposite sides of the second limiting block (21) are each formed with a positioning protrusion (22) matched with the positioning clamping grooves.

8. A non-contact potentiometer according to claim 1, wherein One side of the PCB (24) is formed with a yielding groove (28) at a position corresponding to the limiting protrusion (26).

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