JPH0316227Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a contact fixing structure in a multi-pole connector.

(Prior art and its problems) The miniaturization of various electronic components in recent years has significantly increased the mounting density of components on printed wiring boards, for example. significantly increase the number. For this reason, for example, connectors used to connect printed wiring boards and external circuits are required to have multiple terminals while having the same outer diameter as conventional connectors.

Therefore, for example, the diameter of the male contact pin and the dimensions of the female contact to which it is inserted and connected are made as small as possible, and at the same time, a plurality of male contact pins 1 are arranged in a staggered arrangement as shown in the plan view of FIG. Correspondingly, by arranging the female contacts into which the contact pins are inserted in the same manner, it is possible to maintain the necessary spacing between the contacts within a small area, and to create rows b as shown in Figure 1.
The contact tails 1b of the row a are inserted between the contact tails 1a of the row a and pulled out to accommodate multipolarization. In FIG. 1, the contact tail is pulled out in a direction perpendicular to the contact, but it may be pulled out in the same direction as the contact. However, in this case, the diameter of the male contact pin may be less than a few millimeters, and the female contact may also be correspondingly small. Therefore, when fixing the contact in the insulating housing, for example, as shown in the cross-sectional view in FIG.
It is difficult to use the conventional method of fixing by hooking it onto the internal retaining step 3a. Therefore, for example, the contacts are firmly press-fitted into the insertion holes of the insulating housing to fix them. However, as mentioned above, the contacts are small and mechanically fragile, so it is easy to cause irregular contact spacing due to bending, etc. There are many difficulties in implementation.

(Purpose of the invention) The present invention has been made for the purpose of providing a structure in which a contact can be fixed to an insulating housing without the above-mentioned difficulties.

(Structure of the invention) As shown in FIG. 3a, the present invention makes the head 6a' of the contact part (contact pin) 6a of the contact slightly thicker than the contact part, and the contact part 6a and the thick head 6a' The contact 6 is formed by electrically connecting a thin contact tail 6b to the head 6a' so as to form a cone-shaped stepped portion at a substantially right angle to the contact pin 6a. On the other hand, in the insulating housing 4, as shown in FIG. 3b, there is a contact connected to the upper part of the contact insertion hole 4c for inserting the contact pin 6a with a cone-shaped surface corresponding to the cone-shaped stepped part of the contact pin 6a. A hole 4c' that is slightly thicker than the hole 4c corresponding to the head of the pin 6a is bored, and a fitting recess 4b for fitting the fixing plate 5 for fixing the contact 6, and a contact tail 6b are formed. Drawer groove 4e for pulling out
has been created. Then, insert the contact pin 6a into the insertion hole 4c, insert the contact tail 6b into the pull-out groove 4e, and insert the fixing plate 5 into the fitting recess 4b.
By fitting the head 6a' of the contact pin 6a into the insertion holes 4c' and 4 as shown in Fig. 3c.
The fixing plate 5 is fixed in the insertion hole 4c via the step formed between the fixing plate 5 and the fitting recess 4b.

That is, in the present invention, almost the entire surface of the end face of the contact head 6a', excluding the part where the contact tail 6b is installed, of the contact pin is pressed by the contact fixing plate 5, and the cone-shaped stepped part is pushed into the insertion hole 4b. It is pressed against the cone-shaped stepped portion of the Moreover, since the cone-shaped stepped portion of the contact pin fits snugly into the coned stepped portion of the insertion hole 4c having a corresponding shape, the insertion holes 4c, 4
c′, the contact part 6a of the contact pin, and the thick head 6
Even if you make a gap for insertion between a′,
It is fixed without causing [backlash]. Therefore, unlike when press-fitting a contact pin into an insertion hole, you are not limited by the thickness of the contact pin, and even thin contact pins can be easily and securely fixed without bending or sagging. I can do it.
Note that 5e is a second pull-out groove that allows the contact tail 6b to be pulled out in the direction of the pull-out groove 4e when the fixing plate 5 is fitted into the insulating housing 4, and this pull-out groove is made slightly thicker than the diameter of the contact tail 6b. This prevents any force from being applied to the contact tail 6b to fix the contact pin. 5c is a contact tail extraction groove used when the contact tail 6b is to be pulled out in the same direction as the contact pin 6a, as shown by the dotted line in FIG. 3c. Next, the present invention will be described in detail with regard to embodiments.

(Embodiment) Figures 4a, b, c, and d are exploded perspective views of an embodiment of the present invention, in which the male contact tails arranged in a staggered manner can be pulled out in any direction perpendicular to or in the same direction as the contact pins. It consists of an insulating housing 4, a contact fixing plate 5, and contacts 6, 7, which are assembled to form a contact as shown in the perspective view shown in FIG. 5 and the cross-sectional view shown in FIG. It has a fixed structure, and each of the above parts is constructed as follows.

That is, as shown in FIG. 4a, the insulating housing 4 has a contact fixing plate fitting recess 4 provided with press-fit fixing grooves 4a at the left and right ends on the contact tail extraction surface.
In addition, holes 4 for male contact pins 6a, 6a', 7a, 7a' are provided at the bottom of this recess 4b.
c, 4c' in a staggered arrangement with four insertion hole rows a, b,
a' and b' are provided. In addition, on both longitudinal side wall edges 4d of the insulating housing 4 formed by the contact fixing plate fitting recess 4b, contact tail horizontal extraction grooves 4e are provided at equal intervals in positions corresponding to the contact insertion holes 4c. ing.

Next, the contact fixing plate 5 has a size that can be press-fitted into the contact fixing plate fitting recess 4b as shown in FIG.
Fitting protrusions 5a that fit into the fixing grooves 4a provided at the left and right ends of the insulating housing 4 are provided on both longitudinal edges 5b of the fixing plate 5. Contact tail pull-out groove 4e
Vertical lead-out grooves 5c for the contact tails are provided at corresponding positions. Further, on the surface of the insulating housing 4 on the side of the contact insertion holes 4c, there are first contact tail extraction grooves 5d that reach the contact tail vertical extraction grooves 5c from the installation corresponding parts of the contact insertion holes 4c in rows a and b', and ，
It has a second contact tail extraction groove 5e that is longer than the above-mentioned extraction groove 5d and reaches the contact tail vertical extraction groove 5c from the installation corresponding part of each contact insertion hole 4c of a'.

Next, the contact parts 6 and 7 have contact pins 6a and 7a and contact tails 6b and 7b, respectively, as shown in FIGS. First and second contact tail extraction grooves 5d and 5e of the fixed plate 5,
It is bent to match the shape of the contact tail extraction passages of different lengths formed by the vertical extraction groove 5c and the horizontal extraction groove 4e.

Then, insert the contact pins 6a and 7a into the contact insertion hole 4c as shown in FIG. 5a,
The tails 6b and 7b are fitted into the contact tail horizontal extraction groove 4e. Next, as shown in FIGS. 5b and 6, while inserting the contact tails 6b and 7b into the contact tail vertical pull-out grooves 5c, the contact fixing plate 5 is fitted and fixed into the fitting recess 4b of the insulating housing 4. By doing so, a receptacle connector is constructed.

(Effect) As described above, while inserting the contact tails 6b, 7b into the contact tail horizontal extraction groove 4e, the contact pins 6a, 6a', 7 having stepped portions are
a, 7a' into the contact insertion holes 4c, 4c' having a step slightly larger than the pin diameter of the insulating housing 4, and press-fitting the contact fixing plate 5 into the third contact insertion hole 4c, 4c'.
As explained in the figure, the contact pins 6a, 6a', 7a, 7 are fixed by the fixing plate 5 and the insulating housing 4.
If a′ is fixed, the diameter of the pin and the There is no need to match the diameter of the insertion hole. Therefore, even if contact pins become thinner and more fragile due to multipolarization,
Since the contact pins are not bent during insertion and the pin spacing is not irregular, and the pins are securely fixed, assembly is simplified. On the other hand, the contact tails are pulled out by the respective pull-out grooves 5e and 4e, but since the contact pins connected to the respective contact tails are fixed by the fixing plate 5, the individual contact tails are pulled out by the pull-out grooves 5e and 4e. Since it is possible to have some play within 4e, as shown by the dotted line in Figure 5a,
It is possible to connect the contact tail to the connecting piece 8 in advance and insert the contact pins into the respective contact insertion holes 4c all at once. This also simplifies assembly,
Moreover, since the contact tail extension interval is maintained by the connecting piece 8, it is easy to insert the contact tail into the horizontal extension groove 4e, and assembly is facilitated. Also, the contact tail is the contact fixing plate 5.
and the drawer grooves 5e, 5d, 4e of the insulating housing 4
Since the contact tail is placed inside the contact tail, there is good insulation between the contact tail and the adjacent contact tail.

(Other Embodiments) The present invention has been described above regarding the fixation of male contacts, but in the case of female contacts, as shown in the cross-sectional view in FIG.
1 into the contact insertion hole 4c of the insulating housing 4, the contact part of the contact (for example, a socket in this case) is fixed by the contact fixing plate 5, and electrically connected to the contact sockets 6a1 and 7a1. thin contact tails 6b, 7
By drawing out the contact tail b from the contact tail drawing groove 5c, the same effects as described above can be achieved. In this case, there is no need to create a step like in the case of contact pins.
Of course, it is sufficient to directly connect the contact socket and the contact tail. In this embodiment, the contact tail 6b is pulled out from the insulating housing 4 in a straight line without any bend in the pull-out passage.In this case, when the contact tail 6b is pulled, the contact of the contact is Since force is applied directly to the connection part (socket), it is preferable to provide a bend.

In addition, in FIG. 6, the insulating housing 4 is provided with a horizontal lead-out groove 4e for the contact tail, and the contact fixing plate 5 is provided with a vertical lead-out groove 5 for the contact tail.
An example is shown in which the contact tails 6b and 7b are formed so as to be drawn out in the direction perpendicular to and in the same direction as the contacts (dotted lines). However, if the contact only needs to be pulled out in the direction perpendicular to the contact, there is no need to provide the vertical pull-out groove 5c of the contact fixing plate 5 as shown in FIG. There is no need to provide the horizontal extraction groove 4e of the insulating housing 4 as shown in FIG. 8b.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of conventional connectors;
Figures 3 a, b, and c are sectional views of contact a, a state with the fixing plate released, b, and a state c, fixed with the fixing plate, for explaining the outline of the present invention, and Figure 4 shows the housing a of the present invention, and the fixing plate. b, contact c, contact d
FIGS. 5a and 5b are perspective views for explaining contact installation and fixing plate installation, FIGS. 6 and 7 are sectional views of another embodiment of the present invention, and FIGS. 8a and b are sectional views of other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Male contact pin, 1a, 1b... Contact tail, 2... Fixing claw piece, 3, 4... Insulating housing, 3a... Retaining step, 4a... Contact fixing plate press-fit fixing groove, 4b ...Contact fixing plate fitting recess, 4c, 4c'...Contact insertion hole, 4d...Top end surface of both side walls, 4e...Contact extraction groove, 5...Contact fixing plate, 5a...
Fitting protrusion, 5b...Contact tail fixing part, 5
c, 5d, 5e... Contact tail vertical extraction groove, 6, 7... Contact, 6a, 7a... Contact pin (contact part of contact), 6a1, 7
a1...Contact socket (contact part of contact), 6b, 7b...Contact tail, 8...
Connecting piece.

Claims (1)

[Scope of Claim for Utility Model Registration] Insert the contact portion of a contact whose thin tail portion is electrically connected approximately at right angles to the contact contact portion into an insertion hole provided in the installation surface of the contact fixing plate fitting recess of the insulating housing. , the contact fixing plate is fitted into the fixing plate fitting recess to fix the contact contact portion to the insertion hole, and the tail portion is inserted into the insulating housing through the pull-out groove provided in the housing and the fixing plate. In the contact fixing structure of an electrical connector configured to be pulled out to the outside, the contact has a contact portion 6a at one end, and a thin head portion 6a′ having a diameter larger than the contact portion 6a at the other end. The contact tail 6b is pin-shaped and is thinner than the head 6a' and electrically connected to the end face of the head 6a' and extends substantially perpendicularly to the contact portion 6a, and the contact insertion hole consists of a contact insertion hole 4c into which the contact part 6a is inserted and an insertion hole 4c' into which the head 6a' is inserted, and the contact part 6a
The stepped portion of the contact pin formed between the head 6c' and the insertion hole 4c' into which the contact portion 6a is inserted has a corresponding cone shape. The contact head 6a' is held down by the fixing plate 5 over almost the entire end surface of the head 6a' except for the part where the contact tail 6b is installed. tail pull-out groove 5e
is a contact fixing structure of an electrical connector characterized by being slightly thicker than the contact tail 6b.