JPH0421252Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improved screw-fastening connector for smoothly connecting and disconnecting male and female electrical connectors.

[Conventional technology]

In recent years, with the diversification of various electrical components installed in automobiles, etc., the connectors connected to wire harnesses have tended to have more pins and become larger.
Since a large amount of force is required to connect and disconnect connectors into which male and female terminals are respectively inserted, screw-tight connectors have been proposed that use tools and prevent damage to the connectors due to excessive joining force.

FIG. 4 is a longitudinal cross-sectional view showing the state of the conventional screw-tight connector before connection, and shows the upper female connector B.
A bolt C is inserted into the central through hole 7 between the head seat surface 1 and the upper wall surface 8 of the female connector B with a spring 21 interposed therebetween, and a stop ring 2 is attached to the bolt C. It is fitted in contact with the lower wall surface 9 of B.

The bolt C has a small-diameter narrow shaft portion 4 formed between the male screw portion 3 at the tip and the stopper ring 2.

Furthermore, a nut D having a female thread 11 on the axial extension of the bolt C is integrally fixed to the male connector A together with a nut holder 12, and a groove 19 is provided between the outer periphery of the nut holder 12 and the male connector A. is provided so that the guide wall 20 of the female holder B engages with the guide wall 20 of the female holder B.

In order to join connectors with this kind of structure,
The bolt C is
By screwing the male threaded part 3 into the female threaded part 11, the force of the spring 21 overcomes the resistance force at the time of connector joining, and the female connector B is joined to the male connector A. In this case, the spring force If it is weak, only the bolt C will enter in the axial direction while compressing the spring 21, and the important female connector B
There is a problem that the bonding is not done because the bonding is not pressed.

FIG. 5 is a longitudinal sectional view showing the state after the male and female connectors A and B are connected, in which the male threaded portion 3 of the bolt C passes through the female threaded portion 11, and the distal end 5 of the male threaded portion 3 connects to the female threaded portion. It has a structure in which it abuts against the outlet end 13 of 11.

In this state, further tightening is prevented, but as mentioned above, the spring 21 with strong spring force
is used, so the male thread part 3 is the female thread part 11.
When passing through and idling, the end portion 5 of the male thread portion
has the disadvantage that the screw threads are likely to be crushed due to strong collision with the outlet end 13 of the female threaded portion 11, and when the screw threads are crushed, the bolt C
Even when the screws are rotated in the direction of loosening, the screw threads do not engage, and even if they do, the screw threads are crushed while screwing together, making it impossible to remove the screws smoothly.

[Problem that this invention attempts to solve]

In view of the above problems, the present invention allows the thrust of the bolt C to directly act as a joining force on the connector to smoothly join the connector, and after the connector is joined, the male screw part 3 is connected to the female screw part 11. To provide a screw-fastening type connector which can be lightly abutted and smoothly screwed in without crushing the screw threads, and can be smoothly removed.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a bolt C having a male threaded portion 3 in one connector so as to be movable within a certain range, and a female bolt C that is screwed into the male threaded portion 3 with respect to the other connector. A nut D having a threaded portion 11 is fixed, and a threading auxiliary spring member 15 is provided, and when the male threaded portion 3 passes through the female threaded portion 11, the male threaded portion 3 is attached to the threaded auxiliary spring member 15. It abuts against the tip of the member 15, and has a structure in which the male threaded portion 3 is pressed in the direction opposite to the direction of screw insertion.

[Effect]

Since the present invention is constructed as described above, the thrust generated by the screwing of the male threaded part 3 provided on one connector and the female threaded part 11 fixed to the other connector acts directly as a joining force of the connector. to smoothly connect one connector to the other.

When the male threaded portion 3 passes through the female threaded portion 11, the connector completes the connection, but no further screw insertion is possible, thereby preventing damage to the connector due to over-tightening.

Furthermore, in this state, the male threaded portion 3 comes into contact with the tip of the screwing auxiliary spring member 15, which can set a sufficiently weak spring force compared to the conventional one, and the male threaded portion 3 is pressed in the direction opposite to the screwing direction. be done.

Here, the bolt C having the male thread part 3 is fixed to one connector so as to be movable within a certain range,
That is, since the bolt C is provided with play in the axial direction, the male threaded portion 3 lightly contacts the female threaded portion 11, preventing the threaded threads from collapsing, and also preventing the connector from being removed. When the bolt C is rotated in the loosening direction, the male thread part 3 is smoothly screwed into the female thread part 11 without crushing the thread, and the connector is smoothly removed as the bolt C moves. .

〔Example〕

FIG. 1 is a vertical cross-sectional view showing the state of the screw-fastening type connector of the present invention before the male and female connectors A and B are connected. is inserted into the through hole 7 provided in the center of the upper female connector B with the head seat surface 1 in contact with the upper wall surface 8 of the female connector B, and the shaft portion of the bolt C is inserted into the through hole 7 provided in the center of the upper female connector B. has female connector B
A stopper ring 2 is fitted with a slight distance 10 from the lower wall surface 9 of the holder.

That is, the bolt C is provided on the female connector B so as to be movable within a certain range.

Here, the length of the male threaded portion 3 of the bolt C is set so as to match the thread length of the female threaded portion 11 of the nut D fixed to the male connector A side, which will be described later, to form the joining stroke of the connector. Further, the narrow shaft portion 4 is formed to have a smaller diameter than the thread diameter of the female screw portion 11 and to be longer than the height of the female screw portion 11.

On the male connector A side, a nut D having a female screw portion 11 is fixed to a nut holder 12 having a hollow portion 14 provided coaxially with the through hole 7 of the female connector B. A pair of plate-shaped screwing auxiliary spring members 15 are erected on the bottom wall of 14 with a width narrower than the bolt C diameter and with the upper ends curled outward.

As shown in FIG. 2, the screwing auxiliary spring member 15 presses the tip end surface 6 of the bolt C when the male screw portion 3 is screwed into and passes through the female screw portion 11, that is, when the connector is joined. Then, the bolt C is biased in the direction opposite to the screw insertion with a spring force set to be sufficiently weaker than before, so that the distal end 5 of the male threaded portion 3 lightly contacts the outlet end 13 of the female threaded portion 11 of the nut D. ing.

In this example, the screwing auxiliary spring member 15 is a spring holder 16 molded from synthetic resin, as shown in FIG.
The spring holder 16 is provided with a pair of locking pieces 17 on its outer edge and engages with a lock protrusion 18 protruding from the lower part of the outer periphery of the holder 12 made of synthetic resin. There is.

Incidentally, a male terminal and a female terminal (not shown) are inserted into each of the connectors A and B, and the terminals are connected when the connectors are joined to each other.

[Effect of idea]

As described above, the present invention allows connectors to be joined together smoothly by direct tightening force of the bolt C, and after joining, the male thread part 3 of the bolt C is connected to the female thread part 11 of the nut D compared to the conventional method. Light contact with a weak force prevents the screw threads from collapsing.
This has the effect that the connector can be removed smoothly.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view showing the state of the screw-fastening connector of the present invention before joining, Figure 2 is a vertical cross-sectional view showing the state after joining, and Figure 3 is a vertical cross-sectional view showing the state of the screw-fastening connector of the present invention. FIG. 4 is a vertical cross-sectional view showing the state of a conventional screw-tight connector before connection, and FIG. 5 is a vertical cross-sectional view showing the state after connection. . A...male connector, B...female connector, C...
Bolt, D...Natsuto, 3...Male thread, 4...
Narrow shaft portion, 11...Female screw portion, 15...Screwing auxiliary spring member, 16...Spring holder.

Claims (1)

[Scope of utility model registration request] A bolt having a male threaded portion is provided on one connector so as to be movable within a certain range, and a nut having a female threaded portion that is screwed into the male threaded portion is fixed to the other connector, and a screwing auxiliary spring member is attached to the other connector. established,
In the state where the male threaded part passes through the female threaded part, the male threaded part comes into contact with the tip of the screwing auxiliary spring member, and the male threaded part is pressed in a direction opposite to the screw insertion direction. Screw type connector.