CN210268823U

CN210268823U - Resistance card of oil level sensor

Info

Publication number: CN210268823U
Application number: CN201921275584.8U
Authority: CN
Inventors: 陈超; 王涛
Original assignee: Taizhou Zhz Auto Electrical Machinery Co ltd
Current assignee: Taizhou Zhz Auto Electrical Machinery Co ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-04-07
Anticipated expiration: 2029-08-08

Abstract

The utility model discloses a resistance card of an oil level sensor, which comprises a substrate, a conductor and a conduction band which are fixedly arranged on the substrate, wherein the conductor and the conduction band are concentric arc shapes, the arc-shaped edge part of the conduction band is provided with a plurality of probe claws which are uniformly arranged, and each probe claw points to the conductor and inclines towards the clockwise or anticlockwise direction relative to the circle center of the conductor; the utility model discloses a resistance card of oil level sensor, the probe claw on the conduction band is arranging to one side, can guarantee that any position of contact in rotation angle can all contact with the conduction band, can not produce the outage because the contact slides to between the conduction band clearance.

Description

Resistance card of oil level sensor

Technical Field

The utility model belongs to the technical field of the sensor accessory, especially, relate to an oil level sensor's resistance card.

Background

The existing sensor for measuring the oil level of the automobile usually adopts a structural form that a sliding sheet contact slides on a resistance sheet. The sensor comprises a shell and a resistor disc arranged in the shell, wherein two connecting terminals on the resistor disc are connected with an input lead and an output lead, the shell is hinged with a rocker arm, and a part of the rocker arm is arranged in the shell. The front end of the rocker arm in the shell is connected with a sliding sheet, a contact arranged on the sliding sheet is contacted with a conduction band and a conductor on the core surface of the resistance sheet, comb-tooth-shaped probe claws arranged in an arc shape are arranged on the conduction band, and the contact slides on the surface of the conduction band to be contacted with different probe claws to change the resistance value so as to determine the height of the oil level. However, the liquid level of the oil is continuously changed, so that the phenomenon of power failure caused by sliding of the contact to the conduction band gap is easy to occur, and the liquid level display is influenced.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides an oil level sensor's resistance card, the probe claw on the conduction band is arranging to one side, can guarantee that the contact can all contact with the conduction band in any position of rotation angle, can not slide to the conduction band clearance and produce the outage because of the contact.

The utility model discloses a resistance card of oil level sensor, including the base plate and fixedly mounted in conductor and conduction band of this base plate, conductor and conduction band are concentric circular arc shape, and the arc limit portion of conduction band is equipped with a plurality of probe claws of uniform arrangement, and each probe claw all points to the conductor and incline to clockwise or anticlockwise for the centre of a circle of conductor; that is, each probe claw is not directed to the center of the conductor, but arranged along the tangential direction of a circle concentric with the conductor, so that a certain specific angle is formed between each probe claw and a connecting line from the midpoint of each probe claw to the center of the conductor.

Furthermore, the inclination angle of the probe claw relative to the center of the conductor is not more than 10 degrees, and the inclination angle is reasonably set according to the processing performance and the size of the conduction band on the basis of ensuring that the contact can always contact the probe claw.

Furthermore, the probe claws are inclined at an angle of 5 degrees relative to the center of the conductor, the number of the probe claws which can be simultaneously contacted by the contact is within two, and the liquid level detection precision is ensured.

Furthermore, the clearance between the probe claw is half of the probe claw width, and the width of probe claw is 0.3mm, and its clearance is 0.15mm, is guaranteeing the basis of probe claw structural strength, accomplishes that the clearance between the probe claw is enough little, makes the liquid level detection precision higher.

Further, the conduction band is arranged on the radial outer side of the conductor, each probe claw is arranged on the inner arc edge of the conduction band, a plurality of electrodes are arranged on the outer arc edge of the conduction band, and the conductor and the conduction band are respectively in conductive connection with one wiring terminal.

The utility model has the advantages that: the utility model discloses a resistance card of oil level sensor, the probe claw on the conduction band is arranging to one side, can guarantee that any position of contact in rotation angle can all contact with the conduction band, can not produce the outage because the contact slides to between the conduction band clearance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. In the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view taken at A of FIG. 1;

FIG. 3 is a partial cross-sectional view B-B of FIG. 1;

fig. 4 is a schematic structural view of the positioning plate.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

As shown in fig. 1-4: the resistance card of the oil level sensor comprises a substrate 1, and a conductor 7 and a conduction band 2 which are fixedly arranged on the substrate 1, wherein the conductor 7 and the conduction band 2 are concentric circular arc shapes, the arc-shaped edge part of the conduction band 2 is provided with a plurality of probe claws 3 which are uniformly arranged, and each probe claw 3 points to the conductor 7 and deflects towards the clockwise direction or the anticlockwise direction relative to the center of a circle of the conductor 7; that is, each probe claw 3 is not directed to the center of the conductor 7, but arranged along the tangential direction of a circle concentric with the conductor 7, so that a certain specific angle is formed between each probe claw 3 and a connecting line from the midpoint of each probe claw 3 to the center of the conductor 7; because each probe claw 3 forms a comb structure and is easy to deform due to long-term contact of a contact, the resistance card of the oil level sensor further comprises a positioning plate 5 made of an insulating material, the positioning plate 5 is arc-shaped concentric with the conduction band 2, convex ribs 8 are arranged on the surface of the positioning plate 5 corresponding to gaps of the probe claws 3, the positioning plate 5 is clamped between the conduction band 2 and the base plate 1 during assembly, the convex ribs 8 on the positioning plate 5 are embedded into the gaps between the probe claws 3, and then the probe claws 3 are supported and positioned in the circumferential direction, so that the probe claws 3 are prevented from deforming; the top edge of the convex edge 8 is in a reverse arc shape, so that the convex edge is easily embedded into the gap between the probe claws 3, and the assembly is convenient; the top surface of the rib 8 is lower than the surface of the probe claw 3, and does not obstruct the contact between the probe claw 3 and the contact.

In this embodiment, the inclination angle of the probe claw 3 relative to the center of the conductor 7 is not greater than 10 °, and the inclination angle is reasonably set according to the processing performance and the size of the conduction band 2 on the basis of ensuring that the contact can always contact the probe claw 3.

In this embodiment, the inclination angle of the probe claws 3 relative to the center of the conductor 7 is 5 °, that is, an inclination angle of 5 ° is formed between the probe claws 3 and a connecting line from the center point of the probe claws 3 to the center of the conductor 7, and the number of the probe claws 3 which can be contacted by the contacts at the same time is within two, so that the accuracy of liquid level detection is ensured.

In this embodiment, the clearance between the probe claw 3 is half of the width of the probe claw 3, the width of the probe claw 3 is 0.3mm, the clearance is 0.15mm, and on the basis of ensuring the structural strength of the probe claw 3, the clearance between the probe claws 3 is made small enough, so that the liquid level detection precision is higher.

In this embodiment, the conduction band 2 is arranged at the radial outer side of the conductor 7, each probe claw 3 is arranged at the inner arc side portion of the conduction band 2, a plurality of electrodes 4 are arranged at the outer arc side portion of the conduction band 2, and the conductor 7 and the conduction band 2 are respectively connected with one connection terminal 6 in an electric conduction manner.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. A resistive sheet for a fuel level sensor, comprising: the probe claw points to the conductor and deflects towards the clockwise or anticlockwise direction relative to the circle center of the conductor.

2. A resistive sheet for a fuel level sensor according to claim 1, wherein: the probe claws are inclined relative to the center of the conductor by an angle of not more than 10 degrees.

3. A resistive sheet for a fuel level sensor according to claim 2, wherein: the probe claws are inclined at an angle of 5 DEG with respect to the center of the conductor.

4. A resistive sheet for a fuel level sensor according to claim 3, wherein: the gap between the probe claws is half of the width of the probe claws.

5. The resistive sheet of a fuel level sensor of claim 4, wherein: the conduction band is arranged on the radial outer side of the conductor, each probe claw is arranged on the inner arc edge of the conduction band, a plurality of electrodes are arranged on the outer arc edge of the conduction band, and the conductor and the conduction band are respectively in conductive connection with one wiring terminal.