JPH03694Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The invention prevents incorrect insertion of a male connector into a female connector, and prevents the insertion of a male connector into a female connector.
This invention relates to a pin for preventing incorrect connector insertion, which allows male contacts of a male connector to be inserted with correct correspondence.

Prior art and its problems If the male connector is inserted in the wrong direction into the female connector, a corresponding connection between the male and female contacts cannot be obtained, and the circuit connected to the female contact via the continuous male terminal, such as printed wiring, This results in the inconvenience that a corresponding connection with the circuit pattern on the board cannot be obtained.

Conventionally, in order to avoid the above-mentioned situation, some male and female connectors have been molded with an insertion direction indicator, a stopper, etc. on the body, but using symbols to indicate the direction cannot reliably prevent erroneous insertion and may hinder erroneous insertion. In the method of providing a stopper or the like on the connector body by molding, the insertion direction is uniform and fixed, and it cannot be used as a connector for the opposite insertion direction, which is also uneconomical.

Purpose of the invention Unlike the above-mentioned connector body which is provided with a means to prevent incorrect insertion, the present invention inserts a pin into any male contact insertion hole of the female connector and makes this a blind hole. Proper insertion of the male contact can be performed only when the missing part of the male contact matches the blind hole by, for example, missing the corresponding male contact, and other incorrect insertions are accurately prevented, The present invention is designed to reliably prevent problems such as the male contact filling the blind hole being bent and allowing the insertion of another contact if the male contact is inserted in the wrong direction. By simply pushing the pin into the male contact insertion hole, it can be held securely and without looseness, and by selectively inserting the pin into the male contact insertion hole at the site, the direction of incorrect insertion can be prevented. This can be set at any time to ensure compatibility with the connector body.

Structure of the invention The present invention is constructed to achieve the above object, and has an insertion depth set at one end of the elongated pin body to be inserted into the male contact insertion hole so that it is seated on the opening edge of the male contact insertion hole. A mortar-shaped recess is formed on the top surface of the head to receive the tip of the incorrectly inserted male contact, thereby reliably preventing the incorrectly inserted male contact from sliding or bending. A locking part for preventing the pin from coming off is provided in the male contact insertion hole to engage with the resilient contact tip of the female contact accommodated in the male contact insertion hole, and the pin is firmly held in the male contact insertion hole. The recess is shaped like a mortar, thereby further perfecting the effect of preventing the incorrectly inserted male contact from sliding sideways and bending.

Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail with reference to FIGS. 1 to 5.

In FIG. 1, 1 indicates a female connector and 2 indicates a male connector. The female connector 1 has a plurality of rows of male contact insertion holes 3. Female contacts 4 are housed in the male contact insertion holes 3, and male terminals 4' are connected to a printed wiring board or the like from the female contacts 4. are arranged in series and protrude downward from the female connector 1.

On the other hand, the male connector 2 has a male contact 5 corresponding to the female contact 4, and the male contact 5 is inserted into the male contact insertion hole 3 and connected to the female contact 4 housed in the hole. The female contact 4 is a type of contact that makes contact by sandwiching the male contact 5, and has a pair of contact pieces 4a extending from the opening of the male contact insertion hole toward the bottom of the hole as shown.

Reference numeral 6 denotes an erroneous insertion prevention pin made of an integral synthetic resin for making the male contact insertion hole 3 a blind hole. The erroneous insertion prevention pin 6 has an elongated pin main body 6a that is inserted deeply into the male contact insertion hole 3 as a base body, and has a head 6b at one end of the elongated pin main body 6a. The head 6b is seated on the opening edge of the male contact insertion hole 3, and the insertion depth of the insertion prevention pin 6 is set.

That is, the elongated pin main body 6a is inserted to a depth such that the seat surface of the head 6b is fixed to the opening edge of the male contact insertion hole 3. The elongated pin main body 6a has a glans-shaped tip 6e, and a step portion cut out at the base of the glans-shaped tip 6e forms a locking portion 6c, and the head 6b fits into the male contact insertion hole 3. At the position where the elongated pin main body 6a reaches a certain insertion depth, the locking portion 6c is engaged with the female contact 4 to prevent it from coming off. As a means for preventing the female contact 4 from being removed by engaging the female contact 4 with the erroneous insertion prevention pin 6 at a position where the elongated pin main body 6a is inserted to a certain depth, the embodiment uses the elastic force between the pair of contact pieces 4a. The pin main body 6a is press-fitted against the force, and while it is held by the clamping force of the contact piece 4a, the tip of the contact piece 4a is engaged with the step on the side surface of the pin that forms the locking part 6c to prevent it from coming out. The mechanism is illustrated.

Further, a recess 6d is formed in the top surface of the head 6b formed at one end of the elongated pin body 6a.

The recess 6d receives the tip of the incorrectly inserted male contact and prevents it from escaping laterally (leading to bending).

As an example, the recess 6d has a mortar shape as shown in FIGS. 1 to 4, and its bottom surface is inclined toward the axis of the elongated pin body 6a. That is, mortar-shaped recess 6
The deepest part of d exists on the insertion axis P of the male contact 5. As a result, the mortar-shaped recess has the function of centering the slightly displaced male contact.

In FIG. 1, the male contact 5 is shown by dotted lines and solid lines, the dotted line shows the deformed and displaced state, the solid line shows the correct vertical state, and the mortar-shaped recess 6d is misinserted in the displaced state. When the male contact 5 is pushed in, the inclined bottom surface of the recess 6d has the function of correcting its posture toward the axis P and making it vertical.
Since the male contact 5 is in a vertical state, it exhibits maximum bending strength when a pushing force is applied.

The elongated pin body 6a preferably has a square cross section as shown. If it were made into a cylindrical shape, it would easily slip and tilt during insertion. The example is contact piece 4
A supports the flat side surface of the rectangular elongated pin body 6a, and effectively prevents it from tilting.

Effects of the invention According to the invention, any one or more of the male contact insertion holes 3 of the female connector 1 can be selected and the above-mentioned erroneous insertion prevention pin 6 can be inserted therein to form a blind hole (for example, the male contact insertion hole 3 of the female connector 1 can be selected as a blind hole). As shown in the explanatory diagram in Figure 5, the male contact insertion hole at the end of one row is a blind hole. 3a
indicates a blind hole), and if the male contact corresponding to the blind hole 3a is missing (5a in FIG. 5 indicates a missing male contact part), the missing male contact part 5
Insertion of the male contact 5 is permitted only when the blind hole 3a into which the incorrect insertion prevention pin 6 is inserted coincides with the blind hole 3a, and if the insertion direction is incorrect, the actual male contact 5a' and the blind hole 3a The tip of the male contact 5a' hits the top surface of the head 6b of the incorrect insertion prevention pin 6 inserted into the blind hole 3a, and the recess 6d
It is possible to reliably make the reader feel that the insertion tube has been received inside and cannot be pushed in any further, that is, that it has been inserted incorrectly.

Furthermore, the male contact 5 is received within the recess 6d, effectively preventing it from sliding laterally and thus from inducing bending. At this time, by making the recess 6d into a mortar shape, the male contact 5 may be inserted incorrectly.
Even if a′ is deformed and tilted, the axis P
It is possible to correct the posture of the male contact to a vertical state, and to create a state that exhibits the highest bending strength against pushing of the male contact. Therefore, despite the minute male contact, incorrect insertion can be detected without causing abnormal deformation.

Further, according to the present invention, the erroneous insertion prevention pin 6 can be inserted into the male contact insertion hole 3 with the head 6b to a certain insertion depth, and the female contact 4 can be used to prevent the pin from coming out. That is, according to the present invention, it is not necessary to provide a locking means for the pin on the inner wall of the male contact insertion hole 3, but the contact piece of the female contact is used, and the locking part 6c is securely attached to the tip of the contact piece. It can be locked.

Then, with the head 6b fixed on the opening edge of the male contact insertion hole 3, the locking part 6c is engaged with the tip of the elastic contact piece of the contact 4,
It can be held in the hole 3 without any play, and can exert its effectiveness without falling off during use or transportation.

Also, by selecting and inserting the erroneous insertion prevention pin 6 into any insertion hole 3 at any occasion at the site of use or at the factory (for example, by inserting the male contact insertion hole 3b in the other row in Fig. 5 into a blind hole). By doing so, the purpose of preventing incorrect insertion can be achieved, and the same female connector can be used as a connector to prevent incorrect insertion in either the forward or reverse direction, which has advantages such as being economical. have

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view showing the incorrect insertion prevention pin shown as an embodiment of the present invention in a connector loaded state, Fig. 2 is a front view of the incorrect insertion prevention pin, Fig. 3 is a side view of the pin, and Fig. 4 is a side view of the pin. This figure is a plan view of the same, and FIG. 5 is a pattern diagram illustrating the relationship between the erroneous insertion prevention pin and the male and female contacts. 1... Female connector, 2... Male connector, 3...
Male contact insertion hole, 4...Female contact, 4
a, 4a... Same contact piece, 5... Male contact, 6...
...Incorrect insertion prevention pin, 6a...Elongated pin body, 6b
...head, 6c...locking part, 6d...recess, 6e
...Glans-shaped tip.

Claims (1)

[Scope of utility model registration request] A head seated on the opening edge of the male contact insertion hole is provided at one end of the elongated pin body to be inserted into the male contact insertion hole, and a recess for receiving the tip of the incorrectly inserted male contact is formed on the top surface of the head, The inserting portion of the elongated pin body is provided with a retaining portion for engaging with the tip of the resilient contact piece of the female contact accommodated in the male contact insertion hole, and the recess is shaped like a mortar. Connector pin to prevent incorrect insertion.