JPH0135414Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a waterproof coupler used in a thermosensor for a radiator of a motorcycle or the like.

Conventionally, the thermosensor has a sensor part 2 at the tip of a metal part 3 as shown in FIG. At the rear end of the metal part 3, a cylindrical resin part 8 having a built-in contact mechanism of the sensor is fixed to the caulking part 6 by caulking. A tab-shaped male contact portion 9 is provided in a leg-shaped manner. The thermosensor 1 described above is fixed by screwing the threaded part 4 into the radiator wall and tightening the nut part 5, and the male contact part 9 is crimped to the end of the electric wire 12 shown in FIGS. 1C and D. female contact part 1 of the terminal 10
1 is inserted.

According to the thermosensor having the above structure, since the resin part 8 containing the contact mechanism is long, the thermosensor attached to the radiator wall protrudes considerably from the wall. Therefore, due to the limited allowable space around the radiator, it is difficult to provide sufficient waterproofing means to the terminal 10, and waterproofness at the contact portion is not desirable. Therefore, by connecting a waterproof coupler to the resin part 8 and connecting the male contact part 9 of the thermosensor 1 and the terminal inside the waterproof coupler to improve waterproofness, a locking mechanism prevents the waterproof coupler from coming off. However, as the locking mechanism is formed, the caulked portion 6 and the nut portion 5 become unnecessarily large.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide a waterproof coupler having a novel locking mechanism that solves the above-mentioned conventional difficulties.

That is, the present invention includes a sensor part, a metal part which is followed by a mounting screw part, a tightening nut part for the screw part, and a caulking part,
In connecting a waterproof coupler to a thermosensor having a resin part having a protruding leg-shaped male terminal fixed to the caulked part, the waterproof coupler has a fitting part for receiving and coupling the latter half of the thermosensor. The fitting part is provided with a cantilever-shaped locking piece that extends in the direction of the opening and has a locking part at the tip, and a polygonal top part is formed on the outer periphery of the nut part. It is characterized by a structure in which a locking pawl is formed with notches on both sides, and a locking mechanism is configured to prevent the waterproof coupler from coming off by engagement of the locking piece and the locking pawl.

Hereinafter, a detailed explanation will be given with reference to embodiment drawings.
In Figures 2 to 7 showing one embodiment, the figures are automatic 2
This figure shows a waterproof coupler for a thermosensor for a radiator of a wheeled vehicle.The thermosensor 1 has the same structure as in Fig. 1, with a sensor part 2 metal part 3 resin part 8 connected from the tip. 3 is formed with a threaded portion 4 into which an O-ring 7 is fitted, a nut portion 5, and a caulked portion 6, and a pair of leg-like tab-shaped contact portions 9 are provided protruding from the resin portion 8.

On the other hand, the waterproof coupler 15 has a fitting part 16 that receives the latter half of the thermosensor 1, and a fitting part 16 that receives the latter half of the thermosensor 1.
There is a receiving part 17 that is integrally connected to the rear end portion and has an axis 17' that is orthogonal to the axis 16' of the fitting part 16, and further has a receiving part 17 that is connected to the rear end of the fitting part 16 and the rear end of the receiving part 17. , and the axis 16' of the fitting part 16 and the receiving part 1
A terminal accommodating portion 18 is integrally molded with resin at the intersection of the axes 17' of 7. For details, see the fitting part 16
are the nut part 5 of the thermosensor 1, the caulking part 6,
It also has a cylindrical recess 19 with a front opening so as to receive and connect the resin part 8, and the bottom of the recess 19 communicates with the terminal accommodating part 18 to accommodate the tab-shaped thermosensor 1 inserted therein. The contact portion 9 is configured to protrude into the terminal accommodating portion 18. and,
In accordance with the shape of the thermosensor 1 to be received, the recess 19 has a first half 19A on the inlet side in a hexagonal shape corresponding to the nut part 5, a second half 19B in a cylindrical shape corresponding to the resin part 8, and a second half 19B.
A seal ring 20 is inserted into the resin portion 8 to tightly press against the outer periphery of the received resin portion 8.

Further, the outer periphery of the fitting portion 16 is provided with a base portion of the fitting portion 1
A band-shaped locking piece 23 is formed at the rear of the opening 6 and extends in the direction of the opening, and the locking piece 23 constitutes an elastic cantilever beam, and the middle portion thereof becomes a window portion 25. A locking portion 24 formed by the edge of the window portion 25 is provided at the free end.
is formed. On the other hand, raised locking claws 13 are provided on the outer periphery of the nut portion 5 of the thermosensor 1. As shown in FIGS. The apex 13' of the locking pawl 13 is on the same circumference as the other apex 5'. When the latter half of the thermosensor 1 is received in the fitting part 16 and the two are combined, the locking piece 23 is attached to the guide slope 1 at the front end of the locking claw 13.
3" and deflects outward, thermosensor 1
At the final joint position of the waterproof connector 15 and the waterproof connector 15, the locking claw 13 and the locking portion 24 of the locking piece 23 engage with each other, forming a locking mechanism that fixes both so that the waterproof connector 15 does not come off.

The receiving part 17 has a cylindrical shape with a front opening so that the L-shaped terminal shown in FIGS. It is completed. The terminal accommodating part 18 is formed with a accommodating chamber 28A28B divided into two upper and lower chambers as shown in FIG. It is accommodated facing the direction of the section 16.
Claw portions 29 and 30 are formed at the top and bottom of the housing chamber 28A28B to lock the position of the housed terminal 21.

Further, the L-shaped terminal 21 has an L-shaped terminal in which the direction of the contact portion 11 and the wire 12 crimped by the crimping piece 27 are perpendicular to each other.
The contact portion 11 is formed into a receptacle-like contact portion that receives the tab-like contact portion 9 of the thermosensor 1 . And L-shaped terminal 2
An elastic stopper 26 is tightly inserted into the electric wire 12 near the terminal accommodating section 1, and the L-shaped terminal 21 is inserted into the terminal accommodating section 1.
8, the plug body 26 is internally inserted into the receiving part 17 to make the part watertight.

The waterproof coupler having the above structure functions as follows. That is, referring to FIGS. 6 and 7, a pair of L-shaped terminals 21 are inserted in advance into the waterproof coupler 15 from the front opening of the receiving portion 17, and the pair of L-shaped terminals 21 are inserted into the waterproof coupler 15 from the front opening of the receiving portion 17.
It is inserted into 8B. The L-shaped terminal 21 is inserted with its contact portion 11 facing the direction of the fitting portion 16, and the claw portion 29 provided at the lower part of the storage chamber 28A28B
The side portions of the terminals 21 are engaged and locked so that they cannot be pulled out, and the upper edge of the contact portion 11 is in the storage chamber 28.
The A28B is clamped from the front and back by the claws 30 provided on the upper part thereof, and its insertion posture is fixed. When the L-shaped terminal 21 is correctly inserted, the plug 26
is shifted toward the receiving section 17, and the receiving section 1
A stopper 26 is fitted inside the stopper 7, and its opening is closed in a watertight manner. When the waterproof coupler 15 described above is fitted onto the thermosensor 1 previously attached to the radiator wall 31, the latter half of the thermosensor 1 is combined with the fitting part 16, and the tab-shaped contact part 9 is connected to the housing chamber 28A28B. L-shaped terminal 2 inside
Connected to 1. The resin part 8 of the thermosensor 1 is press-fitted with the seal ring 20 to ensure sufficient sealing performance of the part, and the thermosensor 1 and the waterproof coupler 15 are not separated by the above-mentioned locking mechanism. be combined.

According to the above-described waterproof coupler of the present invention, the fitting part that receives the mating terminal part and the receiving part that receives the electric wire terminal part are configured to be orthogonal to each other, and each is connected to the mating part by a seal ring and a plug body. Since the coupler is watertightly connected to the member, the waterproof performance of the coupler is sufficiently ensured. Since the insertion direction of the electric wire side terminal is perpendicular to the fitting direction of the contact parts, the total length of the waterproof coupler does not become long, and the locking claw of the locking mechanism is attached to the nut part. Since it is formed by utilizing the top part, there is no risk of the nut part becoming bulky, and there is an advantage that the entire thermosensor including the waterproof coupler can be made smaller.

In this manner, the present invention provides a new waterproof coupler that overcomes the problems of the conventional coupler.

[Brief explanation of drawings]

Figure 1: Shows the conventional structure of a thermosensor, A
is its front view, B is its plan view, C and D are front views of the terminals to be connected, Fig. 2: a front view of an embodiment of the present invention, Fig. 3: a plan view of the waterproof coupler of the embodiment of Fig. 2. , Fig. 4: Left side view of Fig. 3, Fig. 5: Side view of the thermosensor shown in Fig. 2, Fig. 6: Front view showing the usage state of the embodiment in Fig. 2, Fig. 7: Fig. 6. Top view of the figure. Main symbols: 1: Thermosensor, 2: Sensor part, 3: Metal part, 4: Thread part, 5: Nut part,
8: Resin part, 9: Tab-shaped contact part, 10: Terminal, 1
5: Waterproof coupler, 16: Fitting part, 17: Receiving part, 18: Terminal accommodating part, 19: Recessed part, 20: Seal ring, 21: L-shaped terminal, 26: Plug body, 28A
28B: Storage chamber, 29, 30: Claw portion.

Claims (1)

[Scope of utility model registration request] There is a sensor part, a mounting screw part following the sensor part, a tightening nut part for the screw part, and a metal part forming a caulking part, and a leg-shaped male terminal is provided protruding from the caulking part. A waterproof coupler is connected to a thermosensor to which a resin part is fixed, and the waterproof coupler is provided with a fitting part for receiving and coupling the latter half of the thermosensor, and the fitting part has an opening. A cantilever-shaped locking piece extending in the direction of the nut and having a locking part at the tip is formed, and locking claws with notches on both sides of the polygonal top are formed on the outer periphery of the nut part, A waterproof coupler characterized by a structure having a locking mechanism in which the locking piece and the locking claw engage with each other.