JPH0614472B2 - connector - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector used to electrically connect a wire and a printed circuit board, for example.

2. Description of the Related Art In recent years, many electronic devices are configured by connecting modularized and packaged members with a multicore wire rod through a connector. This is in consideration of the requirements due to the spatial arrangement of each member and the convenience of exchanging optional members and repair members, but various problems occur when the usage environment becomes severe.

Considering, for example, the case where the connector is always used in an environment where there is vibration, the connection point of the connector having the conventional structure is easily separated.
Further, if the number of contacts to be connected is large, the workability in mounting these contacts in the housing becomes extremely poor.

SUMMARY OF THE INVENTION The present invention has been developed in view of these circumstances, and its gist is to provide a conductive contact for electrically connecting a first connected member and a second connecting member; and accommodating the contact. A housing having a housing hole for holding the contact and a locking means for locking the contact in the housing hole;
The body of the contact has a substantially cylindrical shape, and a means for connecting the first connected member is provided at one end of the contact, and a means for connecting the second connected member is provided at the other end. And means for locking the contact by forming a step along the circumferential direction of the contact apart from the tip of the contact in the axial direction by a predetermined distance.
The connector is provided in the housing hole and has a locking member whose tip engages with the step portion of the contact when the contact is inserted into the housing hole.

Further, in the invention of the present application, the first connected member is a wire, the second connected member is a pin contact or a post-shaped contact, and a ferrule is fitted to the tip of the contact to form the step. Forming a part, said second
It is also possible to selectively take measures such as fixing the connected member of the above with at least a pair of leaf springs extending in the axial direction of the contact, and providing the pair of leaf springs with their tips displaced from each other. .

Description of Embodiments A connector according to the present application will be described below in detail based on illustrated embodiments.

FIG. 1 shows an example in which the present invention is implemented as a waterproof connector.

The illustrated connector includes a plurality of substantially cylindrical receptacle contacts (10) terminating a wire (100), a plurality of plug housings (20) for accommodating the receptacle contacts therein, and a plurality of the plug housings. A cap housing (3) with a plurality of pin contacts (200) electrically connected to the receptacle contacts (3)
0) and.

More specifically, the plug housing has a hole (21) for holding a plurality of receptacle contacts, while the cap housing has a plurality of pin contacts in a cavity (31) for receiving the plug housing. It is planted at the position corresponding to the receptacle contact.

Each receptacle contact passes through the through hole (41) of the rubber bush (40) fitted in the plug housing and is held in the storage hole (21).

The pin contact penetrates the bottom of each cavity of the cap housing and projects to the outside, and the projecting portion serves as a terminal and is connected to, for example, a printed circuit board.

FIG. 2 is a cross-sectional view showing a state where the plug housing and the cap housing are fitted to each other, and shows that the receptacle contacts receive the pin contacts and make an electrical connection by fitting the both housings.

Referring back to FIG. 1, the receptacle contact has a stepped portion (13) formed by fitting a ferrule (annular portion) (14) at the tip thereof, and at the storage hole (21) in the plug housing,
As shown in FIG. 2, the ferrule engages with a pair of upper and lower lances (spear-shaped portions) (22) provided in the housing hole.

In addition, in order to form the stepped portion (13), it is conceivable to fold back the tip of the contact body, increase the material thickness of the tip of the contact, or the like.

The lance is formed by forming a part of the peripheral wall of the housing hole in a spear shape with the tip as a free end along the axial direction of the hole, and the tip is engaged with the stepped portion of the ferrule, Hold the receptacle contact in the storage hole.

In FIG. 1, the rubber bush (40) is made of heat-resistant silicone rubber, and oil is added to reduce insertion resistance. A plurality of ridges (42) serving as a seal ring are provided on the circumferential wall to improve the sealing effect.

In the illustrated embodiment, a plurality of protrusions (24) are provided on the bottom of the cavity (23) of the plug housing that receives the rubber bush. This protrusion acts so as not to deform the through hole when the receptacle contact is inserted into the through hole of the rubber bush, and the contact can be easily passed through regardless of the thickness of the wire or the position of the through hole. Make it so that it can be inserted into the hole.

Incidentally, a receiving hole (not shown) for fitting with the protrusion may be provided on the rubber bush side.

It is desirable that the protrusions be regularly arranged around the contact receiving hole, but the present invention is not particularly limited thereto. Further, the heights of the protrusions do not necessarily have to be uniform. Further, the number and depth of the receiving holes of the rubber bush are not particularly limited. Moreover, you may provide a hole which does not fit with the said protrusion.

Next, in FIG. 1, (25) shows a locking spring provided on the top of the plug housing. This spring is made of metal and has a substantially S-shaped cross section as shown in Fig. 2, and one bent portion (Fig. 25a) is fitted into a fitting groove (26) provided at the top of the housing. Fit. The other bent portion (25b) is a grip portion, and when the plug housing is inserted into the hollow portion of the cap housing while pushing down the bent portion, the locking opening (27) provided in the abdomen of the spring and the hollow portion And a locking projection (32) provided on the inner wall of the upper part of the upper part locks (latches).

Both sides of the locking spring are guarded by the ridges (28), which eliminates the inconvenience that the wire rod gets under the spring when the plug housing is fitted into the cap housing.

Furthermore, since the insertion direction of the plug housing is determined by the presence of the protrusion, the plug housing can be inserted into the cap housing without erroneous orientation.

The height of the ridge is designed so that the wire does not get tangled even if the gripping portion side is made higher and the spring bias distance is set as large as possible.

In FIG. 1, (50) is a seal ring, which is made of heat-resistant silicone rubber impregnated with oil, like the rubber bush.

FIG. 3 shows the details of the cap housing, in which a plurality of pin contacts are staggered in three rows. As shown in FIG. 2, each pin contact projects to the outside via a feedthrough capacitor (33). One pole of this feedthrough capacitor is soldered to a ground plate (34) covering the back surface of the cap housing. This capacitor acts as a filter to prevent external noise.

Note that (35) is a mechanism for aligning the leads of the pin contact, which is similar to the known one.

4A and 4B show an embodiment of the receptacle contact according to the present invention.

(10a) shows an electrically conductive substantially cylindrical body. The reason why the main body has a tubular shape is to eliminate the directionality when inserting the contacts, to facilitate the work, and to reduce the number of contacts that can be housed in the housing.

(11) is a means for electrically connecting the conductors at the ends of the wire, and in the illustrated embodiment, the wire is fixed by crimping.

The contact body (10a) and the connecting means (11) for connecting to the wire or the like are provided with a tapered portion as shown in the figure, but this is to facilitate the removal of the contact from the storage hole.

(12) is a means for connecting pins, terminals, etc. provided on a connector or a printed circuit board, for example, and in the illustrated embodiment, at least a free tip formed by forming a split groove along the axial direction of the main body It consists of a pair of leaf springs.
The pair of leaf springs have their tips displaced from each other as shown. This is because the ferrule allows the pin to come into contact with the receptacle contact in two steps, which facilitates insertion, and the spring can comfortably receive the pin even if the pin is displaced from the spring. It is possible to eliminate the inconvenience that the spring is overstressed and the spring is irreversibly deformed.

(14) is a ferrule that covers the tip of the body. The corner (corner) of the ferrule tip is slightly rounded as shown. As a result, the contact can be inserted into the through hole (41) of the rubber bush without damaging the rubber bush (40).

After this ferrule is attached to the main body, for example, a notch (14a) is provided at an appropriate position on the peripheral wall surface of the ferrule and fixed.

The known ferrule is used to reinforce the tip of the contact body. However, as described above, the present invention provides a lance provided with the step portion (13) formed by the ferrule and the body in the housing hole of the housing. It is used as a locking means with.

As shown in FIG. 5, if the groove (14b) is provided on the peripheral wall surface of the main body along the stepped portion, the ferrule will be pushed deeper into the lance, the engagement between the two will be ensured, and the contact main body will be secured. The holding power is strengthened.

The configuration of the connector according to the invention of the present application has been described in detail above, and the following unique effects can be obtained from the configuration.

That is, in the connector of the present invention, the contact body is securely held in the housing hole by locking the stepped portion provided at the tip of the contact with the locking means provided in the housing hole for receiving the contact. You can

If a ferrule is attached to the tip of the contact,
The ferrule or the like serves as a guide when receiving the member to be connected (pin or the like), and the pin or the like can be smoothly inserted into the contact body. Further, by providing the ferrule or the like, the tip of the contact is sufficiently protected from external force.

[Brief description of drawings]

FIG. 1 is an exploded view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a fitted state of a connector according to the embodiment of FIG. 1,
FIG. 3 is an exploded view of the cap housing in the embodiment of FIG. 1, FIG. 4A is a sectional view in which a part of the receptacle contact according to the present invention is cut away, and FIG. 4B is A of FIG. 4A.
-A line sectional view, FIG. 5A is an exploded view showing another embodiment of the receptacle contact according to the present invention, and FIG. 5B is a sectional view of an essential part of the same embodiment. [Explanation of symbols of main parts] (10) ... contact, (100) ... first connected member, (200) ... second connected member, (12) ... second connected member Means for connecting (13) ... steps,
(21) …… Storing hole, (22) …… Locking means

Claims (4)

[Claims] 1. A conductive contact (10) for electrically connecting a first member to be connected (100) and a second member to be connected (200), and a housing hole for accommodating the contact (10). A connector (21) and a housing (20) including a locking means (22) for locking the contact in the housing hole, wherein the contact has a substantially cylindrical main body, A means (11) for connecting the first connected member (100) is provided at one end of the contact, and a means (12) for connecting the second connected member is provided at the other end. At the same time, a step (13) is formed axially away from the tip of the contact by a predetermined distance and along the circumferential direction of the contact, and the means (22) for locking the contact is provided in the accommodation hole. A locking member which is provided at the end of the contact and engages with the stepped portion of the contact when the contact is inserted into the receiving hole. The means (12) for connecting the second connected member are at least a pair of leaf springs extending in the axial direction of the contact such that the tip of the means (12) is hidden inside the stepped portion (13), A connector in which the tips of the pair of leaf springs are provided so as to be offset from each other. 2. The connector according to claim 1, wherein the first member to be connected (100) is a wire rod. 3. The connector according to claim 1, wherein the second member to be connected (200) is a pin contact or a post-shaped contact. 4. The connector according to any one of claims 1 to 3, wherein a ferrule (14) is fitted to the tip of the contact to form the step (13). Connector.