JPH0621181Y2 - Cover of insulation displacement connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to the structure of a press-connecting connector, particularly a wire connecting cover in a small press-connecting connector.

(Prior Art) A pressure contact connector, that is, a pressure contact (1) having a line press-fitting slit (1a) at the center and contact tails (1c) provided with oblique blades (1b) on both right and left sides thereof as shown in FIG. The connector body A in which the elements are arranged and fixed in a line according to the required number of poles, and the line fixing portion provided corresponding to each contact (1), for example, the line press-fit groove (2) provided with the escape slit (2a) of the contact tail is provided. The so-called press-connecting connector, which is composed of the cover B that it has, is widely used.

In this connector, the contact tail (1c) escapes the cover B in which the wire (3) is press-fitted and fixed in each wire press-fit groove (2) and the slit (2a).
By pushing it over the connector body A so that it goes inside, the contact tail (1c) is inserted as shown in Fig. 2 (a) and (b).
Make a cut in the coating (3a) of the wire (3) with the slanted blade (1b), and press the slit (1b) into the core wire (3b) exposed by the subsequent pressing.
a) Press-fit into (a) to electrically connect the contact (1) and the wire (3), and insert this into the body of a similarly configured mating connector to connect with the circuit connected here. Is.

By the way, with the recent strong demand for miniaturization of equipment, Fig. 3
As shown in (a), the contacts (1) are arranged in a plurality of rows, for example, in four rows in a zigzag pattern. In this case, it is easy to fix the wires to the cover B and to arrange a large number of connecting wires. There is a strong demand for ease of use. Therefore, as shown in FIG. 3 (b), the cover B is divided into two in the direction of the escape slits (2a) so as to be addressed to two rows, for example, and a drawing space (2b) of the line (3) is formed in the center. Covers B'and B "with contact surfaces (2c) and (2d) at both ends
Formed from. And this cover B ′ divided into two,
B ″ is provided on each of the left and right side surfaces, and both inner side surfaces (5a) are guided by the locking projections (4), and the contact tail (1c) and the line (3) are connected. Then, the tip engaging bar (5b) goes over the locking projection (4) and then falls down to be locked as shown in Fig. 3 (c). The U-shaped elastic locking piece (5) has a coupling and integration.

(Problems of the prior art) However, as described above, the split covers B'and B "are engaged with the protrusions.
In the structure in which the cover B is configured by integrally combining (4) and the U-shaped elastic lock piece (5), the lock piece (5) is smoothly guided by the locking protrusion (4) without being caught. It is necessary to have a slight amount of rattling between the two, and the engaging cover (5b) at the tip does not get caught and the latching protrusion (4) In order to make it fall smoothly to the outside, it is necessary to have a slight amount of rattling between them.

However, as described above, the miniaturization of the connector has progressed, and the arrangement pitch of the contacts in the connector main body A and the distance between the contact rows have become remarkably small.
When the arrangement pitch of the escape slits (2a) and the gap between the slit rows in B ″ become extremely small, the lock mechanism (5)
Even if a small amount of noise is generated, it reverberates greatly, and for example, as shown in FIG. 4 (a), the press-fitting groove (2a) of one of the divided covers B'is assumed.
And contact tail fixed to the connector body A side
Even if (1c) is positioned, the other split cover B ″ and the corresponding contact tail as shown by the dotted line in the figure
The contact tail (1c) may not be inserted due to misalignment with the (1c). Therefore the tail (1
The cover B is pushed into the connector main body A while the c) is still hitting the escape slit (2a), and the contact tail (1c) is deformed as shown in FIG. Connection of the contact tail (1c) is deformed by shorting one of the contact blades (1c) of the contact tail (1c) as shown in Fig. 4 (c). Cause a fatal defect.

Therefore, in order to eliminate this defect, between the contact tail (1c) and the escape slit (2a), there is
A large [rare] is provided in the escape slit (2a) so that the deviation of the position based on it can be absorbed. According to this method, the contact tail (1
Although it can be avoided due to deformation of c), this time the line (3) that should be pushed into the press-fit slit (1a) by being pushed by the contact tail (1c) has become large as shown in Fig. 4 (d).
It is pushed into (2a). For this reason the line (3) by the beveled blade (1b)
Insufficient or incomplete cut into the cover (3a), resulting in poor connection, or even if there is a cut in the cover (3a), press fit into the press fit slit (1a) is insufficient and There is a drawback that the connection may become unstable due to insufficient pressure.

(Purpose of the Invention) The present invention provides a structure in which the divided covers can be securely integrated without rattling, and the lock structure as described above causes a large disconnection, instability, or escape slit due to the rattling. This eliminates defects such as connection failure and instability due to line drop. Next, details of the present invention will be described with reference to the drawings.

(Means of the present invention for solving the problem) In the case of a press-connecting connector, once the wire is connected to the contact, the connection is rarely broken and there is little opportunity to dismantle the split cover integrally combined. The present invention was made by paying attention to this point, and the feature is in the following points.

That is, the abutting surfaces of the split covers are butt-joined to each other by the projecting rod and the press-fitting hole, and press-fitting is performed in a state where the projecting rod or the press-fitting hole is in a uniform multipoint contact with a circle and a regular polygon. This feature eliminates the rattling at the time of joining to prevent connection failure due to deformation of the contact tail due to unstable positioning, and allows the split covers to be joined together with a small amount of pressure input. It was done. Next, the present invention will be specifically described by way of examples.

(Embodiment) FIG. 5 is an embodiment of the present invention, in which the same reference numerals as those in FIG. 3 denote the same parts. In the figure, B ′ and B ″ are divided covers, (2) is a press-fitting groove for fixing the wire, (2a) is a clearance slit of the contact tail, (2b) is a wire drawing space, and (2c) is a divided cover B ′. Contact surfaces provided at both ends on the side, and (2d) are contact surfaces provided at both ends on the side of the divided cover B ″, which are the same as those shown in FIG. Reference numeral (6) is a projecting rod having a circular cross section, and a guide slope (6a) is provided at its tip end portion which is provided at a right angle to the contact surface (2c) of the divided cover B '. (7) is a press-fitting hole of a protruding rod whose one side is slightly smaller than the diameter of the protruding rod (6), and has a square cross section, and the contact surfaces of the divided covers B ′, B ″. (2c) (2d) is abutted and the rod (6) is press-fitted.

(Operation of the embodiment) As described above, according to the present invention, since the protruding covers (6) are press-fitted into the press-fitting holes (7), the split covers B'and B "are positionally locked to each other. In addition, the protruding rod (6) is circular, the press-fitting hole (7) is a square, and the protruding rod (6) and the press-fitting hole (7) are at four points. Since the contact is made, the pressure applied to each contact point is equal, so that the fixed position does not get out of order at the time of press fitting, and the positioning accuracy is remarkably improved. It is possible to reduce the possibility that the positions of the covers B ′ and B ″ with respect to the position of the cover B ′ and B ″ may be misaligned to cause a connection failure due to deformation of the contact tail. As a result, it is not necessary to increase the escape slit as in the conventional case, so that there is no possibility that the wire pushed by the contact tail when the connector body and the cover are joined is pushed into the escape slit and the connection is hindered. As described above, since the contact between the protruding rod (6) and the press-fitting hole (7) is made at four points and becomes point contact, it is possible to relatively easily couple with a small press-in force.
Therefore, according to the present invention, the defects of the conventional structure can be eliminated, and the pressure contact connector can be downsized.

(Other Embodiments) In the above embodiments, an example in which the projecting rod has a circular cross section and the press-fitting hole has a square cross section has been described, but the reverse is also possible. Also, in the above, the protruding rod (6) is provided on the side of the split cover B ',
The press-fitting hole (7) is provided on the B ″ side, but the reverse is also possible. Further, as shown in FIG. 6, the projecting rod (6) and the press-fitting hole (7) are provided on the split cover B ′ side, and the split cover B ″ side is provided. Reverse the position for press-fitting holes (7)
And a stake (6) may be provided. In this case, since the divided covers B ′ and B ″ can be made to have the same shape, the number of parts can be reduced. Further, the regular quadrangular cross section may be more regular polygonal cross section. In this case, up to a regular octagon. For example, the pressure input will increase, but the positioning accuracy will not change.

(Results of trial production) A contact with a tail of 0.25 mm thickness and 1.7 mm width was
In a connector consisting of a connector body with 120 rows and 4 rows arranged in a staggered pattern and a split cover, a rod with a circular cross section with a diameter of 1.3 mm and a length of 2 mm and a press-fit hole with a diameter of 1.2 mm and a depth of 4 mm are provided. When a binding test was conducted, the force input was 1.5 kg, which can be easily pressed in with the hand, and the binding force was zero. In addition, the size of the escape sleeve can be set to 2 mm in width and 0.47 mm in depth length (corresponding to the thickness of the contact tail), and it is possible to prevent sinking into the escape slit.

On the other hand, when the conventional locking mechanism was used for the same connector, the rattling after locking was 0.3 mm.

(Effect of the Invention) As is apparent from the above, according to the present invention, it is possible to provide a press-connecting connector free from connection failure and instability of the wire and the contact due to deformation and bending of the contact tail. It can contribute.

[Brief description of drawings]

1 and 2 are explanatory views of the press-connecting connector, FIG. 3, and FIG.
FIG. 5 is an illustration of contact failure due to deformation and bending of the contact tail, FIG. 5 is an illustration of an embodiment of the present invention, and FIG. 6 is an illustration of another embodiment. A ... Connector body, B ... Cover, B ', B "... Divided cover, (1) ... Contact, (1a) ... Wire press-fit slit, (1b) ... Oblique blade, (1c). Contact tail, (2) ...
… Wire fixing press-fitting groove, (2a) …… Contact tail clearance slit, (2b)… Line drawing space, (2c) (2d) …… Abutting surface, (3) …… Line, (3a) …… Coating, (3b) …… Core wire, (4) ……
Locking protrusion, (5) …… U-shaped elastic lock piece, (5a) …… Leg piece, (5b) …… Inside surface thereof, (5c) …… Tip engaging bar part,
(6) …… Thrust rod, (7) …… Press fit hole.

Claims (1)

[Scope of utility model registration request] 1. A plurality of fixing means for fixing a connection line, which is used by being overlapped with a connector body in which a plurality of pressure contact is aligned and planted in at least two rows on a plane and is fixed to each of the pressure contacts. In a cover of a press-connecting connector provided with press-fitting grooves corresponding to each of the aligned press-fitting contacts, the cover of the press-connecting connector is divided between rows of the fixing press-fitting grooves arranged in rows. ,
Each of the connection lines to be pressed is drawn out from between the divided covers, and a cylindrical or regular polygonal columnar rod is provided on the side surface of one of the divided covers. The side surface of the other divided cover is provided with a regular polygonal press-fitting hole or a circular press-fitting hole that fits into a cylindrical or regular polygonal columnar projection rod provided on the side of the one cover. Both covers are provided with the cylindrical protruding rod and the regular polygonal press-fitting hole,
Alternatively, the cover of the press-connecting connector is characterized in that the projection rod having the regular polygonal column shape and the circular press-fitting hole are press-fitted so as to be combined and integrated.