Search

CN-224231050-U - Rolling type triggered liquid level sensor

CN224231050UCN 224231050 UCN224231050 UCN 224231050UCN-224231050-U

Abstract

The utility model discloses a rolling type triggering liquid level sensor, which relates to the technical field of liquid level sensors and comprises an outgoing line, a rocker arm, a pin shaft, a sensor base, a flexible circuit contact plate, sealing adhesive and a thick film resistor substrate, wherein the sealing adhesive is fixed at the upper end of the thick film resistor substrate and seals the upper end of the thick film resistor substrate, one side of the upper end of the thick film resistor substrate is provided with a rolling mechanism which is connected with the rocker arm in an adapting way, the rolling type triggering liquid level sensor is meshed and transmitted through a gear and a rack, rolling contact of a roller on the flexible circuit contact plate is combined, friction loss is greatly reduced, signal stability is improved, the flexible circuit contact plate, the sealing adhesive and the thick film resistor substrate are in seamless fit, deformation and sealing adhesive pulling are reduced, the service life is prolonged, the gear tooth number is designed to improve the travelling precision, the accuracy of liquid level detection is ensured, the whole structure is compact, and the rolling type triggering liquid level sensor is suitable for corrosive environments such as oil liquid, and the reliability is high.

Inventors

  • SHEN JIAJIA
  • SUN WEIHUA
  • SHEN XUEPING
  • CHEN LIANG
  • MIN JIANFENG

Assignees

  • 浙江湖州新京昌电子有限公司

Dates

Publication Date
20260512
Application Date
20250612

Claims (6)

  1. 1. The liquid level sensor triggered by rolling comprises an outgoing line (1), a rocker arm (2), a pin shaft (3), a sensor base (4), a flexible circuit contact board (5), sealing adhesive (6) and a thick film resistor substrate (7), and is characterized in that the sealing adhesive (6) is fixed at the upper end of the thick film resistor substrate (7), the upper end of the thick film resistor substrate (7) is sealed and sealed by the sealing adhesive (6), one side of the upper end of the thick film resistor substrate (7) is provided with a rolling mechanism, the rolling mechanism is connected with the rocker arm (2) in an adapting mode, the rocker arm (2) swings to drive the rolling mechanism to move, and the contact end of the rolling mechanism is in rolling contact with the surface of the flexible circuit contact board (5).
  2. 2. The rolling type triggered liquid level sensor of claim 1, wherein the rolling mechanism comprises a gear (11), the gear (11) is rotatably connected to the midpoint position of the lower end of the rocker arm (2), a rack (10) is fixed on one side edge of the thick film resistor substrate (7) close to the gear (11), and the gear (11) is in meshed connection with the rack (10).
  3. 3. The rolling type triggered liquid level sensor according to claim 2, wherein limiting plates (8) are fixed on two sides of the rack (10), strip-shaped sliding holes (9) are formed in the limiting plates (8), two sides of the gear (11) are arranged in a protruding mode and located in the strip-shaped sliding holes (9) to limit sliding, connecting rods (12) are fixed at the outer side ends of the gear (11), rollers (13) are connected to the end portions of the connecting rods (12) in a rotating mode, and the rollers (13) are in rolling contact with the surface of the flexible circuit contact plate (5).
  4. 4. The rolling type triggered liquid level sensor of claim 3, wherein the gear (11) is meshed and matched with the rack (10), the gear (11) has dense teeth, and the number of the racks (10) is correspondingly matched and arranged to improve the walking precision.
  5. 5. A rolling type triggering liquid level sensor as claimed in claim 3, wherein the roller (13), the connecting rod (12) and the rocker arm (2) are electrically connected, and the roller (13) is in rolling contact with the flexible circuit contact board (5) to stably transmit an electric signal.
  6. 6. The rolling type triggered liquid level sensor of claim 2, wherein the flexible circuit contact board (5), the sealing adhesive (6) and the thick film resistor substrate (7) are in seamless joint, so that deformation of the flexible circuit contact board (5) and pulling of the sealing adhesive (6) are reduced.

Description

Rolling type triggered liquid level sensor Technical Field The utility model relates to the technical field of liquid level sensors, in particular to a rolling type triggering liquid level sensor. Background The existing liquid level sensor mostly adopts sliding contact type triggering, such as a floating ball drives a rocker arm to directly rub against a contact resistor plate, abrasion of a flexible circuit contact plate and ageing failure of sealant are easy to cause in long-term use, measurement accuracy and service life are affected, the existing triggering mode, such as the liquid level sensor with abrasion-free high service life and high reliability disclosed in China patent No. CN203148528U, is hinged on a sensor base through a pin shaft, a contact is fixed on the rocker arm and is electrically contacted with the resistor plate, an electric signal of the contact is conveyed through a lead wire, the resistor plate is fixedly printed on a thick film resistor substrate, the thick film resistor substrate is fixedly arranged on the sensor base, the flexible circuit contact plate is fixedly adhered on the thick film resistor substrate through sealing adhesive, the flexible circuit contact plate is arranged on the upper portion of the resistor plate, the service life is longer, the reliability is higher, the resistance output is more stable, the influence of environment is small, the contact is good in reliability, the contact is in contact with the surface of the flexible circuit contact plate through pressing mode, the surface of the flexible circuit contact plate is downwards bent, the inner sealing adhesive is further pulled to form two sides, and the influence is further caused after long-time use, and peeling is further caused. Therefore, there is a need for a high-precision, long-life rolling-type liquid level sensor that solves the above-mentioned problems. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a rolling type triggered liquid level sensor, solves the problem of stable and durable signal contact of the liquid level sensor, and prolongs the service life of the whole body through a rolling mechanism. The liquid level sensor comprises an outgoing line, a rocker arm, a pin shaft, a sensor base, a flexible circuit contact board, sealing adhesive and a thick film resistor substrate, wherein the sealing adhesive is fixed at the upper end of the thick film resistor substrate, the upper end of the thick film resistor substrate is sealed and sealed by the sealing adhesive, one side of the upper end of the thick film resistor substrate is provided with a rolling mechanism, the rolling mechanism is connected with the rocker arm in an adapting way, the rocker arm swings to drive the rolling mechanism to move, and the contact end of the rolling mechanism is in rolling contact with the surface of the flexible circuit contact board. The thick film resistor substrate is characterized in that the rolling mechanism comprises a gear, the gear is rotatably connected to the midpoint position of the lower end of the rocker arm, a rack is fixed on one side edge of the thick film resistor substrate, which is close to the gear, and the gear is in meshed connection with the rack. Further, limiting plates are fixed on two sides of the rack, bar-shaped sliding holes are formed in the limiting plates, two sides of the gear are arranged in a protruding mode and located in the bar-shaped sliding holes to limit sliding, connecting rods are fixed at the outer side ends of the gear, the end portions of the connecting rods are connected with rollers in a rotating mode, and the rollers are in rolling contact with the surface of the flexible circuit contact plate. Furthermore, the gears are meshed and matched with racks, the number of teeth of the gears is dense, and the number of the racks is correspondingly matched to improve the walking precision. Further, the rollers, the connecting rods and the rocker arms are electrically connected, and the rollers roll to contact the flexible circuit contact board in a rolling manner so as to stably transmit electric signals. And the flexible circuit contact board, the sealing adhesive and the thick film resistor substrate are in seamless joint, so that deformation of the flexible circuit contact board and pulling of the sealing adhesive are reduced. The utility model provides a rolling type triggering liquid level sensor. Compared with the prior art, the method has the following beneficial effects: The rolling-triggered liquid level sensor has the advantages of greatly reducing friction loss and improving signal stability by combining rolling contact of a roller on a flexible circuit contact board through gear and rack meshing transmission, reducing deformation and sealing glue pulling of the flexible circuit contact board, sealing glue and a thick film resistor substrate, prolonging service life, improving walking precision by gear tooth