JPS6113941Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sensor such as a temperature sensor used in automobiles and the like.

Conventionally, as shown in FIG. 1, in this type of connector, a claw 1a for locking with a mating connector is provided only on one side of the connector 1. The outer end of this pawl 1a is provided just at the outer end of the hexagonal part 2a of the case 2, but since the connector 1 and the case 2 are concentric, there is room on the opposite side of the connector 1 to the outer end of the hexagonal part 2a.

However, in the conventional device described above, since the center of the connector 1 and the center of the case 2 are coaxial, the connector lock pawl 1a is attached to the hexagonal portion 2.
In order to fit it into the case 2, the outer diameter of the case 2 must be increased, which results in a larger product.
Since the material is brass or aluminum, it has the disadvantage of being expensive.

In order to solve the above-mentioned drawbacks, the present invention makes the center of the connector and case eccentric by x, and forms a connector lock pawl on one side of the connector that has a margin between it and the outer edge of the case due to this eccentricity. The object of the present invention is to provide a sensor that allows for a smaller case and lower costs.

The present invention will be described below with reference to embodiments shown in the drawings. In Fig. 2, reference numeral 1 denotes a female connector made of resin, which instantaneously and reliably establishes conduction between the integrally formed two-pole terminal 1b and the female terminal of the mating connector. A locking pawl 1a is formed so that it will not come off even if external force is applied. Reference numeral 2 denotes a case, which is used to attach the temperature-responsive reed switch 6 to the cover and detection section. Reference numeral 3 denotes a sealing O-ring provided around the outer circumference of the connector 1 for waterproofing the waterproof connector. Reference numeral 4 denotes a sealing O-ring provided between the connector 1 and the case 2, which prevents water from entering the inside of the case. Reference numeral 5 denotes a sealing O-ring provided on the outer periphery of the case 1 to prevent water from coming out from the case tightening part to the detection part screw part. Reference numeral 7 denotes a filler filled in the case 2 to ensure that external temperature is transmitted to the switch 6. A lead wire 8 establishes electrical continuity between one of the switches 6 and one of the terminals 1b. Reference numeral 2a denotes a hexagonal part provided on the outer periphery of the case 2, which is used to rotate the case 2 by fitting a tightening tool when the case 2 is screwed to the part to be attached using the threaded part 2b. . The connector 1 is fixed to the case 2 by making the center A of the connector 1 and the center B of the case 2 eccentric by an amount x and caulking the open end of the case 2. Further, a connector lock pawl 1a is formed on one side of the connector 1 which has a margin between it and the outer end of the case 2 due to this eccentricity.

In the above configuration, by fitting a tightening tool into the hexagonal part 2a of the case 2 and turning the tool, the sensor is tightened and fixed to the part to be attached using the threaded part 2b of the case 2. At this time, in order to fit the tool into the hexagonal part 2a and to remove it, the outer end of the connector lock pawl 1a needs to be inside the outer end of the hexagonal part 2a. Therefore, when the center of the connector 1 and the center of the case 2 are held coaxially as in the conventional example shown in FIG. One with a large dimension C, for example C=21 mm, must be used. On the other hand, if the center of the connector 1 and the center of the case 2 are offset by x as shown in FIG.
can be used with a small outer diameter C, for example C = 19 mm, and because the case 2 is smaller and the material of the case 2 is brass or aluminum, the material is saved by reducing the size of the case 2. This makes it possible to reduce costs.

FIG. 3 shows another embodiment of the sensor of the present invention, in which a thermistor 6' is used in place of the temperature-responsive reed switch 6 in the sensor shown in FIG. This is a tube that insulates between the lead wire 6' and the case 2.

In each of the above-mentioned embodiments, the present invention was applied to a temperature sensor, but the present invention can be applied to any sensor in which a detection element is housed in a case and a connector is fixed to the case. Can be done.

As mentioned above, in this invention, the center of the case and the center of the connector are offset by x in order to prevent the locking pawl for fixing the mating connector from protruding from the case, so the case can be reduced. It is possible to obtain excellent effects such as reduction in cost and reduction in cost.

[Brief explanation of the drawing]

FIGS. 1A and 1B are a front view and a longitudinal sectional view showing a conventionally known sensor. FIGS. 2A and 2B are a front view and a longitudinal sectional view showing an embodiment of the sensor of the present invention.
3A and 3B are a front view and a longitudinal sectional view showing another embodiment of the sensor of the present invention. 1...Connector, 1a...Lock pawl, 2...
...Case, 6...Temperature-responsive reed switch as a detection element, 6'...Thermistor as a detection element, A...Center of connector 1, B...Center of case 2.

Claims (1)

[Scope of utility model registration request] A sensor comprising a case for housing a detection element and a connector fixed to the case, the center of the connector and the center of the case being eccentric, and a tab for locking the connector being formed on one side of the connector where a gap is created between the connector and the outer end of the case due to this eccentricity.