JP2868013B2 - Potentiometer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a potentiometer used for controlling the position and angle of various electronic devices.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to a potentiometer shown in FIG. FIG. 3 is a side sectional view of a conventional potentiometer. According to FIG. 3, reference numeral 1 denotes a case formed of an insulating material. The case 1 includes a resistance element 2 having a resistor for obtaining a desired resistance value, a sliding contact 5, and a rotor 4. , The rotor 4 connected to the shaft 6 by caulking or the like by rotation of the shaft 6
However, the sliding contact 5 connected to the rotor 4 also rotates.

When the sliding contact 5 slides on the desired resistance element 2, a desired resistance value or voltage obtained from the resistance element 2 is obtained at the resistor terminal 3 connected to the resistance element 2. be able to. Further, since the resistor terminal 3 is connected to the connector terminal 10 of the connector portion 1a provided in the case 1, the resistance value and the voltage change due to the rotational movement of the shaft 6 can be finally obtained from the connector terminal 10. It has become.

[0004] Further, a cover 8 for fixing the resistance element 2, fixing of the case 1 and the cover 8 and waterproofing.
A sealant 9 for performing a seal rubber 7 for performing a waterproof between the shaft 6 and the case 1 are provided.

[0005]

However, in the above configuration, since the adhesive strength between the case 1 and the sealant 9 is weak, a minute gap B is generated between the case 1 and the inside of the potentiometer due to respiration. There is a problem that the suction and the potentiometer function are adversely affected. That is, when the ambient temperature of the potentiometer changes, the air in the space portions 12a and 12b inside the potentiometer expands and contracts, and a pressure difference is generated between the air and the air outside the potentiometer. It is the respiratory action that occurs when this pressure difference tries to equilibrate. Normally , this breathing action is performed by the gap A between the fitting portion of the shaft 6 and the case 1. In general, a seal rubber 7 is provided to protect the waterproofness of this fitting portion. To be unable to breathe completely. As a result, a minute gap B is generated between the sealant 9 and the case 1, and the breathing action is generated by the gap B, thereby impairing waterproofness.

[0006] The present invention is intended to solve such conventional problems, caused more respiration based on the change in ambient temperature
It is an object to provide a potentiometer <br/> Yometa which can significantly improve the waterproof degradation that.

[0007]

[MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
The potentiometer of the present invention had a resistor on the surface
A resistance element, a sliding contact that slides on the resistance element , a rotor that holds the sliding contact, a shaft that rotatably holds the rotor, and a connector part that houses these and engages with a mating connector. The case that is provided
Has the through-hole communicating provided inside the case and the connector portion, and said mating connector, potentiometer
The lead connected to the device controller that controls the input and output of the meter
And the connector portion connected to the lead wire and the lead portion.
Terminals that are electrically connected to the connector terminals that
Between the connector and the connector part.
For waterproofing between the connector and between the mating connector and the lead wire
The seal rubber of each is arranged.
Caused by respiratory action based on changes in ambient temperature
It can greatly improve the deterioration of waterproofness.
You.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, there is provided a resistance element having a resistor on its surface, a sliding contact sliding on the resistance element, and a rotor holding the sliding contact. A case having a shaft rotatably holding the rotor and a connector portion for accommodating them and engaging with a mating connector , and having a through hole communicating the inside of the case with the connector portion. And the other party
The connector has a device to control the input / output of the potentiometer.
Lead connected to the control unit and connected to this lead
And a connector terminal protruding into the connector portion.
Providing a terminal to be electrically connected;
Between the connector and the connector, and between the mating connector and
Seal rubber for waterproofing is installed between the lead wires
According to this configuration, the circumference of the potentiometer is
A change in ambient temperature causes the potentiometer
Even if the air inside the air expands and contracts,
The through hole, the inside of the mating connector, and the mating connector
Through the lead wires provided in the
Communication, which causes the outside of the potentiometer
Since there is no pressure difference between the air of the part and
Waterproofing caused by respiratory action based on changes in ambient temperature
Can significantly improve the deterioration and improve the waterproofness
This has the effect of

(Embodiment 1) Hereinafter, a potentiometer according to Embodiment 1 of the present invention will be described with reference to FIGS.
FIG. 1 is a side sectional view, and FIG. 2 is a view for explaining a connection state with a device. Note that the same parts as those in the conventional technique are given the same numbers.

[0010] According to FIG. 1, in the case 1 to which the connector portion 1a is provided, the resistance element 2 having a resistor for obtaining a desired resistance value on the surface, the sliding contact 5 in sliding contact with this resistance element 2 , the rotor 4, the resistance element 2 in order to house the shaft 6 for holding the rotor 4, further input and output an electrical signal for holding the sliding contact 5
And a connector terminal 10 housed in a connector portion 1a for connection to an external device.
And are connected. At this time, the space portions 12a and 12b formed in the case 1 and the outside of the case 1 are connected to the connector portion 1
a through the through holes 11a and 11b provided in the a. Further, the cover 8 fixes the resistance element 2 and is bonded and fixed with a sealant 9 between the case 1 and the resistance element 2 .
Also of al, the fitting portion between the shaft 6 and the case 1 are arranged sealing rubber 7 for sealing.

Meanwhile, the potentiometer, as shown in FIG. 2, the mating connector 13 having a terminal 14 connected to the lead 16 and the lead wire 16 is connected to the device control unit for controlling input and output of the potentiometer Is the connector part
Terminals 10 and 14 are engaged so as to be pressed against 1a . At this time, the waterproofness of the connector portion 1a and the mating connector 13 is secured by the seal rubber 15, and the waterproof property of the lead wire 16 and the mating connector 13 is secured by the seal rubber 17. Further, an insertion hole 18 for inserting and fixing the terminal 14 is provided in the mating connector 13.

Therefore, the environmental temperature of the potentiometer (ambient
Space 1 in case 1 generated when the temperature changes
The respiration of 2a and 12b is performed through the through holes 11a and 11b, and further performed in the space 19 through the terminal insertion hole 18. In addition, the respiratory action performed in the space 19 is transmitted through the inside of the lead wire (the gap between the core wires) and is performed by the device control unit. Generally, the device control unit is configured by an electronic circuit and is mounted at a position where it is not exposed to water or the like, so that water does not enter therefrom.

Ambient temperature of the potentiometer (ambient temperature)
Space 12a in case 1 that occurs when
Respiration 12b is because done easily through the through-holes 11a, 11b, rather than to continue to entering the inside even if water or the like is applied to the potentiometer, harmful effects to the potentiometer is unavoidable.

Therefore, the adverse effect of intrusion of water or the like from the outside due to the respiration action in the potentiometer can be prevented with a simple structure in which the through holes 11a and 11b dedicated to respiration are formed.

[0015]

As described above, the potentiometer of the present invention
Is a resistance element having a resistor on its surface;
A sliding contact that slides on the element and holds the sliding contact
A rotor, and a shaft rotatably holds the previous SL rotor, they were housed and a case formed by providing a connector portion to be engaged with the mating connector, to communicate the casing interior and the connector portion A through hole is provided, and the counterpart
The connector has a device to control the input / output of the potentiometer.
Lead connected to the control unit and connected to this lead
And a connector terminal protruding into the connector portion.
Providing a terminal to be electrically connected;
Between the connector and the connector, and between the mating connector and
Seal rubber for waterproofing is installed between the lead wires
According to this configuration, the circumference of the potentiometer is
A change in ambient temperature causes the potentiometer
Even if the air inside the air expands and contracts,
The through hole, the inside of the mating connector, and the mating connector
Through the lead wires provided in the
Communication, which causes the outside of the potentiometer
Since there is no pressure difference between the air of the part and
Waterproofing caused by respiratory action based on changes in ambient temperature
Can significantly improve the deterioration and improve the waterproofness
This has the effect of reducing

[Brief description of the drawings]

FIG. 1 is a side sectional view of a potentiometer according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a connection state of the potentiometer with a device.

FIG. 3 is a side sectional view of a conventional potentiometer.

[Explanation of symbols]

1 case 1a connector second resistor element 3 resistor terminal 4 rotor 5 sliding contacts 6 shaft 7 the sealing rubber 8 cover 9 sealant 10 connector terminals 11a, 11b through holes 12a, 12b space 13 mating connector 14 terminals 15 and 17 Seal rubber

Claims (1)

(57) [Claims] 1. A resistance element having a resistor on its surface, a sliding contact sliding on the resistance element, a rotor holding the sliding contact, a shaft rotatably holding the rotor, housed and a case formed by providing a connector portion to be engaged with the mating connector, a through hole communicating said Ke <br/> over scan inside said connector portion, or
The mating connector has a potentiometer input / output
Lead wires connected to the equipment control unit that controls the
A cord connected to the lead wire and projecting into the connector section.
A terminal that is electrically connected to the connector terminal is provided.
Between the mating connector and the connector and the mating connector
Seal rubber for waterproofing between the connector and the lead wire
Potentiometers installed respectively.