CN114267504A - High-precision potentiometer type dustproof displacement sensor - Google Patents
High-precision potentiometer type dustproof displacement sensor Download PDFInfo
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- CN114267504A CN114267504A CN202111540256.8A CN202111540256A CN114267504A CN 114267504 A CN114267504 A CN 114267504A CN 202111540256 A CN202111540256 A CN 202111540256A CN 114267504 A CN114267504 A CN 114267504A
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Abstract
The invention discloses a high-precision potentiometer type dustproof displacement sensor which comprises a shell, wherein the shell comprises an upper shell and a lower shell, and a sliding groove for a sliding block to extend out is formed in the middle of the upper shell; the insulating substrate is fixedly arranged in the upper shell, and a conducting strip, a resistance card and a sliding hole corresponding to the sliding chute are fixedly arranged on the insulating substrate; the slider is arranged between the lower shell and the insulating substrate, the electric brush is fixedly arranged above the slider, one end of the electric brush is connected with the conducting strip, the other end of the electric brush is connected with the resistance chip, and the access resistance value of the resistance chip can be changed when the electric brush slides on the conducting strip and the resistance chip through the slider. Compared with the prior art, the invention has the following advantages: the conducting strip and the resistance card are hung upside down in the upper shell through the insulating substrate. Dust can not accumulate on the conducting strip and the resistance card in the insulating substrate under the effect of gravity, and the conducting strip and the resistance card are caused to have dust deposition to influence the problem of signal output precision, so that the working stability and the service life of the displacement sensor are improved.
Description
Technical Field
The invention relates to the technical field of potentiometers, in particular to a high-precision potentiometer type dustproof displacement sensor.
Background
The potentiometer can convert a mechanical angle signal into an electric signal to be output, has the characteristics of stable performance, simple structure and lower cost, and is widely used in the fields of industry, aerospace and aviation and national defense and military industry. Chinese patent publication No. CN206450175U discloses a resistance type precision displacement sensor. The technical scheme is that the resistance type precise displacement sensor comprises a positioning seat, a resistance plate, an electric brush, a linear guide rod and a movable block, wherein the linear guide rod is detachably arranged on the positioning seat, the movable block is detachably matched with the linear guide rod and can move on the linear guide rod, and the linear guide rod and the movable block are both of structures which are processed and formed independently; the electric brush is arranged on the movable block and movably contacted with the resistance plate. "this patent has improved the cooperation axiality of guide arm and slider, has reduced the clearance of fitting surface, makes the movable block steadily do reciprocating motion on sharp guide arm to make brush and resistance plate closely contact, output stable electricity signal, improve measurement accuracy. The problem of plastic slide and guide pillar fit clearance big make the brush of fixing on it influence signal output precision with bottom circuit board contact bad is solved.
However, the resistive precise displacement sensor adopting the above technical solution also has the following disadvantages: because the potentiometer type displacement sensor drives the electric brush to move on the resistance plate through the movable block to convert a displacement signal into an electric signal, the movable block necessarily extends out of the shell, and the resistance plate cannot be absolutely sealed in the shell. The traditional potentiometer type displacement sensor cannot avoid the problem that the signal output precision is influenced by dust deposition of the resistance plate after long-time work. Therefore, a high-precision potentiometer type dustproof displacement sensor is needed at present to prevent the situation that the resistor disc is accumulated dust, so that the working stability is improved, and the service life is prolonged.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a high-precision potentiometer type dustproof displacement sensor.
In order to achieve the purpose, the invention adopts the following scheme:
a high accuracy potentiometer-style dustproof displacement sensor, comprising:
the shell comprises an upper shell and a lower shell, and a sliding groove for the sliding block to extend out is formed in the middle of the upper shell;
the insulating substrate is fixedly arranged in the upper shell, and a conducting strip, a resistor disc and a sliding hole corresponding to the sliding chute are fixedly arranged on the insulating substrate;
the slider is arranged between the lower shell and the insulating substrate, the electric brush is fixedly arranged above the slider, one end of the electric brush is connected with the conducting strip, the other end of the electric brush is connected with the resistance chip, and the access resistance value of the resistance chip can be changed when the electric brush slides on the conducting strip and the resistance chip through the slider.
Furthermore, the inward extension all around of spout is equipped with the dust excluder, and the dust excluder laminates with the inboard of sliding hole, and insulating substrate all is wrapped up by upper housing internal surface except that the remaining face of lower surface after packing into upper housing. The lower surface of the exposed surface of the insulating substrate faces downwards to face the electric brush, and dust is difficult to fall onto the conducting sheet and the resistor sheet in the insulating substrate due to the action of gravity. Therefore, the design can prevent the conducting strip and the resistor strip from generating dust accumulation, thereby improving the working stability and the service life of the displacement sensor.
Furthermore, the conducting strips comprise a first conducting strip and a second conducting strip which are respectively arranged on the front surface and the back surface of the insulating substrate.
Furthermore, the insulating substrate is provided with a connecting hole, and the first conducting strip is connected with the second conducting strip through the connecting hole.
Furthermore, the first conducting strip, the second conducting strip and the resistance chip are provided with leading-out ends.
Furthermore, the upper shell is provided with a first wiring port through which a wire can pass, the lower shell is provided with a second wiring port through which the wire can pass, and the wire can be inserted into the shell through the first wiring port and the second wiring port and then is connected with the leading-out end.
Further, the slider top sets firmly the push rod that stretches out the upper housing and the fixed column that can supply the brush card to go into, and the brush is equipped with the fixed orifices that can supply the fixed column male, and the brush sets firmly in the slider top through the fixed column and is connected with the conducting strip and the resistance card of top.
Further, the electric brush is a rake-shaped hook-shaped electric brush, and the electric brush is respectively contacted with the conducting strip and the resistance chip through the V-shaped part. The rake-shaped hook-shaped electric brush is contacted with the resistor disc through the V-shaped part, so that the damage to the resistor disc after the electric brush slides and rubs on the resistor disc for many times can be prevented, the stability of a product is improved, and the service life of the product is prolonged.
Furthermore, a first connecting groove is formed in the inner side of the upper shell, and a second connecting groove corresponding to the first connecting groove is formed in the outer side of the lower shell. Glue is injected into the first connecting groove and the second connecting groove at first during installation, then the lower shell is sleeved into the upper shell, and when the glue is solidified in the first connecting groove and the second connecting groove, a tenon is formed to prevent the lower shell from being separated from the upper shell, so that the fixed connection between the upper shell and the lower shell is realized.
Furthermore, the periphery of the lower shell is provided with mounting bosses, and the mounting bosses are provided with mounting holes.
Compared with the prior art, the invention has the following advantages: the conducting strip and the resistance card of the high-precision potentiometer type dustproof displacement sensor are inversely hung in the upper shell through the insulating substrate. Dust can not accumulate on the conducting strip and the resistance card in the insulating substrate under the effect of gravity, and the conducting strip and the resistance card are caused to have dust deposition to influence the problem of signal output precision, so that the working stability and the service life of the displacement sensor are improved.
Drawings
The present application will be described in further detail with reference to the following drawings and detailed description.
Fig. 1 is an exploded view of a high-precision potentiometer-type dustproof displacement sensor according to the present invention.
Fig. 2 is a schematic diagram of the front structure of the insulating plate of the high-precision potentiometer-type dustproof displacement sensor of the invention.
Fig. 3 is a schematic diagram of the reverse structure of the insulating plate of the high-precision potentiometer-type dustproof displacement sensor of the invention.
Fig. 4 is a schematic structural diagram of an upper housing of the high-precision potentiometer-type dustproof displacement sensor according to the present invention.
Fig. 5 is a schematic diagram of a slider structure of the high-precision potentiometer-type dustproof displacement sensor according to the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1 to 5, a high-precision potentiometer-type dustproof displacement sensor comprises:
the shell comprises an upper shell 1 and a lower shell 2, and a sliding groove 101 for the sliding block 4 to extend out is formed in the middle of the upper shell 1;
2-4, the insulating substrate 3 is fixedly arranged in the upper shell 1, and the conducting strip 5, the resistor sheet 6 and the sliding hole 301 corresponding to the sliding chute 101 are fixedly arranged on the insulating substrate 3;
the slider 4 is, as shown in fig. 1 and 5, provided between the lower housing 2 and the insulating substrate 3, the brush 7 is fixedly provided above the slider 4, one end of the brush 7 is connected with the conducting strip 5, and the other end is connected with the resistor disc 6, so that the access resistance of the resistor disc 6 can be changed when the brush 7 slides on the conducting strip 5 and the resistor disc 6 through the slider 4.
Preferably, as shown in fig. 1, the dust-proof strip 102 extends inwards around the sliding groove 101, the dust-proof strip 102 is attached to the inner side of the sliding hole 301, and the insulating substrate 3 is wrapped by the inner surface of the upper casing 1 except the lower surface after being installed in the upper casing 1. The exposed lower surface of the insulating substrate 3 faces downward toward the brush 7, and dust hardly falls onto the conductive sheet 5 and the resistor sheet 6 in the insulating substrate 3 due to gravity. Therefore, the design can prevent the conducting strip 5 and the resistance strip 6 from generating dust accumulation, thereby improving the working stability and the service life of the displacement sensor.
Preferably, the conductive sheet 5 includes a first conductive sheet 501 and a second conductive sheet 502 respectively disposed on the front and back surfaces of the insulating substrate 3.
Preferably, the insulating substrate 3 is provided with a connection hole 302, and the first conductive sheet 501 and the second conductive sheet 502 are connected through the connection hole 302.
Preferably, the first conductive sheet 501, the second conductive sheet 502 and the resistive sheet 6 are provided with terminals.
Preferably, as shown in fig. 1, the upper housing 1 is provided with a first wire connection port 304 through which a wire can pass, the lower housing 2 is provided with a second wire connection port 201 through which a wire can pass, and the wire can be inserted into the housing through the first wire connection port 304 and the second wire connection port 201 and then connected with the terminal 8.
Preferably, as shown in fig. 5, a push rod 402 extending out of the upper housing 1 and a fixing post 401 into which the power supply brush 7 can be inserted are fixedly arranged above the slider 4, the brush 7 is provided with a fixing hole 701 into which the fixing post 401 can be inserted, and the brush 7 is fixedly arranged above the slider 4 through the fixing post 401 and is connected with the conductive sheet 5 and the resistor sheet 6 above.
Preferably, as shown in fig. 5, the brush 7 is a rake-shaped hook-shaped brush 7, and the brush 7 is in contact with the conductive sheet 5 and the resistive sheet 6 through the V-shaped portion 702. The rake-shaped hook-shaped electric brush 7 is in contact with the resistor disc 6 through the V-shaped part 702, so that the electric brush 7 can be prevented from damaging the resistor disc 6 after sliding friction on the resistor disc 6 for many times, the stability of a product is improved, and the service life of the product is prolonged.
Preferably, as shown in fig. 1 and 4, the upper case 1 is provided at the inner side thereof with a first coupling groove 303, and the lower case 2 is provided at the outer side thereof with a second coupling groove 202 corresponding to the first coupling groove 303. When the connecting structure is installed, glue is injected into the first connecting groove 303 and the second connecting groove 202 firstly, then the lower shell 2 is sleeved into the upper shell 1, and when the glue is cured in the first connecting groove 303 and the second connecting groove 202, a tenon is formed to prevent the lower shell 2 from being separated from the upper shell 1, so that the fixed connection between the upper shell 1 and the lower shell 2 is realized.
Preferably, the lower case 2 is provided with mounting bosses 203 on the periphery thereof, and the mounting bosses 203 are provided with mounting holes 204.
Compared with the prior art, the invention has the following advantages: the conducting strip 5 and the resistance strip 6 of the high-precision potentiometer type dustproof displacement sensor are hung upside down in the upper shell 1 through the insulating substrate 3. Dust can not accumulate on conducting strip 5 and resistance card 6 in insulating substrate 3 under the effect of gravity, leads to resistance card 6 to appear laying dust and influence the problem of signal output precision to improve this displacement sensor's job stabilization nature and life.
The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present application, and these modifications and substitutions should also be regarded as the protection scope of the present application.
Claims (10)
1. The utility model provides a dustproof displacement sensor of high accuracy potentiometre formula which characterized in that includes:
the sliding block comprises a shell, a sliding block body and a sliding block cover, wherein the shell comprises an upper shell and a lower shell, and a sliding groove for the sliding block to extend out is formed in the middle of the upper shell;
the insulating substrate is fixedly arranged in the upper shell, and a conducting strip, a resistor disc and a sliding hole corresponding to the sliding groove are fixedly arranged on the insulating substrate;
the sliding block is arranged between the lower shell and the insulating substrate, an electric brush is fixedly arranged above the sliding block, one end of the electric brush is connected with the conducting strip, the other end of the electric brush is connected with the resistance chip, and when the electric brush slides on the conducting strip and the resistance chip through the sliding block, the access resistance value of the resistance chip can be changed.
2. The high-precision potentiometer type dustproof displacement sensor according to claim 1, wherein a dustproof strip extends inwards from the periphery of the sliding groove, the dustproof strip is attached to the inner side of the sliding hole, and the insulating substrate is wrapped by the inner surface of the upper shell except the lower surface after being installed in the upper shell.
3. The dust-proof potentiometer displacement sensor according to claim 1, wherein the conductive plates comprise a first conductive plate and a second conductive plate respectively disposed on the front and back sides of the insulating substrate.
4. The high-precision potentiometer type dustproof displacement sensor according to claim 3, wherein a connecting hole is formed in the insulating substrate, and the first conducting strip and the second conducting strip are connected through the connecting hole.
5. A high accuracy potentiometer type dustproof displacement sensor according to claim 3 or 4, characterized in that the first conducting strip, the second conducting strip and the resistance sheet are provided with leading-out terminals.
6. A high accuracy potentiometer type dustproof displacement sensor according to claim 5, characterized in that the upper housing is provided with a first wiring port for passing a wire, the lower housing is provided with a second wiring port for passing a wire, and the wire can be connected with the leading-out terminal through the first and second wiring ports.
7. The high-precision potentiometer type dustproof displacement sensor according to claim 1, wherein a push rod extending out of the upper shell and a fixing column into which the brush can be clamped are fixedly arranged above the slider, the brush is provided with a fixing hole into which the fixing column can be inserted, and the brush is fixedly arranged above the slider through the fixing column and is connected with a conducting strip and a resistor disc above the brush.
8. A high accuracy potentiometer type dustproof displacement sensor according to claim 1 or 7, characterized in that the brush is a rake-shaped hook type brush, and the brush is contacted with the conducting strip and the resistance sheet through V-shaped parts respectively.
9. The dust-proof displacement sensor as claimed in claim 1, wherein a first connection groove is formed on the inner side of the upper housing, and a second connection groove corresponding to the first connection groove is formed on the outer side of the lower housing.
10. The high-precision potentiometer type dustproof displacement sensor according to claim 1, wherein mounting bosses are arranged on the periphery of the lower shell, and mounting holes are formed in the mounting bosses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111540256.8A CN114267504B (en) | 2021-12-16 | 2021-12-16 | High-precision potentiometer type dustproof displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111540256.8A CN114267504B (en) | 2021-12-16 | 2021-12-16 | High-precision potentiometer type dustproof displacement sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114267504A true CN114267504A (en) | 2022-04-01 |
| CN114267504B CN114267504B (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111540256.8A Active CN114267504B (en) | 2021-12-16 | 2021-12-16 | High-precision potentiometer type dustproof displacement sensor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5825279A (en) * | 1995-05-26 | 1998-10-20 | Matsushita Electric Industrial Co., Ltd. | Slide potentiometer |
| CN207834042U (en) * | 2018-03-06 | 2018-09-07 | 中山金飞电子科技有限公司 | A kind of slide potentiometer |
| CN207834043U (en) * | 2018-03-06 | 2018-09-07 | 中山金飞电子科技有限公司 | A kind of medical precision potentiator |
-
2021
- 2021-12-16 CN CN202111540256.8A patent/CN114267504B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5825279A (en) * | 1995-05-26 | 1998-10-20 | Matsushita Electric Industrial Co., Ltd. | Slide potentiometer |
| CN207834042U (en) * | 2018-03-06 | 2018-09-07 | 中山金飞电子科技有限公司 | A kind of slide potentiometer |
| CN207834043U (en) * | 2018-03-06 | 2018-09-07 | 中山金飞电子科技有限公司 | A kind of medical precision potentiator |
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| CN114267504B (en) | 2022-11-18 |
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