JPS6110949B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plurality of insulating sleeves made of synthetic resin for fixing and holding electrical connector elements such as crimp terminals in a state in which they are inserted. An insulating sleeve band of unit length is formed by molding to be integrally connected at a plate part, and a connecting band plate part integrally protruding from one end side in the longitudinal direction of this insulating sleeve band, and the insulating sleeve band. Both insulating sleeves and a connecting band plate portion integrally protruding from the other end in the longitudinal direction of another insulating sleeve band formed in the same manner are welded and joined together when the latter insulating sleeve band is molded. The present invention relates to a long insulating sleeve band for an electrical connector, which is constructed by integrally connecting bands in their longitudinal directions.

The long insulating sleeve band for electrical connectors constructed by molding as described above is, for example,
Compared to a method in which individually manufactured insulating sleeve bands are made into a long series by taping in a subsequent process,
You can improve productivity, reduce costs, and
Not only can the precision of sleeve pitch and sleeve posture be improved, but since it is constructed by sequentially adding unit lengths of insulating sleeve strips by molding, it is possible to make products of a predetermined length all at once. Compared to those constructed by molding, it requires a smaller mold and is advantageous in terms of equipment costs, and moreover, it only requires molding a unit length of insulating sleeve strip. Although it has the advantage of being superior in productivity because it can be manufactured in only one process, when using such a manufacturing method, the connection between the insulating sleeve bands is the same as the connecting band plate portions at the ends of the insulating sleeve bands. This is due to the connection between the two connecting band plates, and since the joint part is not a continuous integrated structure like the band-like connecting plate part between adjacent sleeves at the middle part of the insulating sleeve band, for example, the two connecting band plates If the parts are simply polymerized and bonded together, the connection strength of this joint part is insufficient, and the joint part may be unexpectedly damaged when the product, that is, the long insulating sleeve band is rolled up and stored or sent for crimping. It is easy to cause problems such as breakage or deformation.

In view of this point, the present invention provides that the coupling action between the connecting band plate part of the insulating sleeve band and the connecting band plate part of another insulating sleeve band is performed simultaneously at the time of molding the separate insulating sleeve band, In other words, by making effective use of the fact that the shape of both connecting strip parts can be freely set to a complicated one without impairing productivity, the connecting strength of the connecting part can be made sufficiently large; At the same time, it is an object of the present invention to utilize the connection structure to form a connection part during molding in a manner that allows the desired connection strength to be easily obtained with high accuracy.

The characteristic structure of the present invention for achieving the above object is that in the elongated insulating sleeve band for an electrical connector molded as described above, one of the connecting band plate parts is A protrusion protruding in the thickness direction is formed on both the front and back sides of the connecting band plate part, and the other connecting band plate part is superimposed on each of the front and back sides of the one connecting band plate part in the thickness direction. It is formed into a bifurcated shape with a pair of opposing pieces to be welded, and each of the body pieces is formed with a through hole that engages with a protrusion provided on the one connecting band plate portion. The opposing pieces of the other connecting band plate part are configured to sandwich the one connecting band plate part from both front and back sides in a state where the protrusion is engaged with the through hole, and further, the protrusion The protruding end surface of the connecting strip section is configured to be substantially flush with the outer surface of the other connecting strip section in the thickness direction, and this configuration provides the following effects.

That is, the coupling action between the connecting band plate part on one end side of the insulating sleeve band and the connecting band plate part on the other end side of another insulating sleeve band is performed by molding the separate insulating sleeve band. Focusing on the fact that even if the connecting strip part has a complicated shape, it does not make it difficult to form, the shape of the connecting part was devised, and each connecting band of the insulating sleeve band was It is possible to obtain a connection structure that has a sufficiently large connection strength by mechanically engaging the protrusions and the through-hole portions that engage with the plate parts, and furthermore, By determining the amount of protrusion of the protrusion as a means for improving strength in relation to the outer surface in the thickness direction of the connecting band plate on the side that engages with the protrusion, mold injection during mold forming is possible. Due to the pressure, the connecting strip on the side where the protrusion is provided bends and deforms in the thickness direction, and as a result, the connection by molding is not performed as expected, making it impossible to obtain the required strength. Such an inconvenient situation can be reliably avoided by the contact between the protruding end surface of the protrusion and the inner circumferential surface of the molding equivalent space, and a sufficiently large connection strength can be determined with precision. be.

Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 1A and 1B, a small-diameter cylindrical portion 1A into which the proximal cylindrical portion a of a crimp terminal A (an example of an electrical connector element) can be inserted and held from one end side.
and a large-diameter tube that can be inserted from the other end side in such a manner that the electric wire end portion B and the conductive wire tip portion b from which the insulation coating has been removed are inserted into the base end tube portion a. The small diameter cylindrical portion 1A has a portion 1B, and the small diameter cylindrical portion 1A has the crimp terminal A and the wire end portion B inserted therein.
A long insulating sleeve band is formed by connecting a large number of synthetic resin insulating sleeves 1 in a band shape, which fixes and holds the crimp terminal A and the wire end B in an electrically connected state by plastic crushing due to external mechanical force. In this case, a plurality of the insulating sleeves 1 are connected to the large diameter cylindrical part 1B through the synthetic resin band-shaped connecting plate part 2 at equal intervals in a parallel posture with each crimp terminal insertion port facing a certain direction. It is constructed by integrally connecting a plurality of insulating sleeve bands 3 of unit length in the longitudinal direction, which are formed by molding in a state where they are integrally connected. The insulating sleeve band 3 has a thin base portion of the sleeve 1 of the band-shaped connecting plate portion 2 between the adjacent sleeves 1, 1, and bends at the thin root portion to prevent the longitudinal direction of the insulating sleeve band 3. The belt-shaped connecting plate portion 2 is configured to be windable in the direction, and the belt-shaped connecting plate portion 2...
... are connected to the outer circumferential surface of the sleeve 1 via an arcuate surface so that the bending at the root portion can be smoothly performed.

The connecting portion structure of the insulating sleeve bands 3 , 3 , . The connecting band plate part 4B integrally projected from the other end side in the direction is inserted into the molding equivalent space 7a of the other end connecting band plate part 4B surrounded by the split molding mold 7... In a state where the connecting band plate part 4A on one end side of 3 is inserted and held, the latter insulating sleeve band 3 is molded to be integrally connected, that is, the overlapping surface of both the connecting band plate parts 4A, 4B Both insulating sleeve bands are welded together during molding.
3 and 3 are configured to be integrally connected.

One end side connecting band plate portion 4 of the insulating sleeve band 3
As shown in FIG. 6, in the portion of A that is inserted into the molding equivalent space 7a, there are a plurality of protrusions 8B that protrude from both the front and back sides in the thickness direction of the connecting strip portion 4A. The connecting band plate part 4B on the other end side is integrally formed with the connecting band plate part 4B on the one end side.
It is formed into a bifurcated shape with a pair of opposing pieces 4b and 4b' which are superimposed and welded to the front and back surfaces of A in the thickness direction, and each of the opposing pieces 4b and 4b' has a , a through hole 8A that engages with a protrusion 8B provided on the connecting strip portion 4A on the one end side.
has been formed. Furthermore, the molding equivalent space 7
a... Protrusion 8B formed on the connecting band plate part 4A on the one end side where it enters and is held...
is configured such that its protruding end surface is substantially flush with the outer surface in the thickness direction of the other end connecting band plate portion 4B. That is, since the protruding end surface and the outer surface are substantially flush with each other, when the one end side connecting band plate part 4A is inserted into the molding equivalent space 7a, the one end side connecting band plate part 4A A structure is obtained in which unexpected deformation due to mold injection pressure can be avoided between the protrusion end face of the protrusion 8B and the inner circumferential surface of the molding equivalent space 7a.

Further, the integral joint portion 4 of the connecting band plate portions 4A, 4B is configured to have the same shape and the same size as the band-like connecting plate portion 2, and is integrally connected with each of the band-like connecting plate portions 2... Insulating sleeve band feeding holes 9 are formed in each of the portions 4 and 4. In addition, when each sleeve 1... is used as a feeding locking part, the above-mentioned feeding hole 9 does not need to be provided.

Further, although the through holes 8A and the protrusions 8B are illustrated as having circular cross sections, they may have triangular or square cross sections, and the number thereof may also be other than four.

Further, the elongated insulating sleeve band may have an insulating sleeve 1' having a structure as shown in FIG. 8 or having an insulating sleeve 1'' having a structure as shown in FIG. 9.

The insulation sleeve 1' shown in FIG. The insulating sleeve 1'' shown in FIG.
Large-diameter cylindrical parts 1B'', 1B into which two electric wire ends B, B can be inserted from opposite directions to both ends of a small-diameter cylindrical part 1A'' into which a cylindrical member A'' for crimp-connecting wires B can be inserted and held. Both insulating sleeves 1', 1'' have small diameter cylindrical parts 1A', 1
By applying external mechanical force to A″, this small diameter cylindrical part 1 is
By crushing A′, 1A″, the cylindrical member A′,
A'' and both wire ends B, B... are fixedly held in an electrically connected state.

FIG. 7 shows another embodiment in which the belt-like connecting plate portion 2 and the integral joint portion 4 are provided with a feeding protrusion 9' instead of a feeding hole 9.

In this specification, welding refers to a state in which a portion of the molecules of one synthetic resin partially enters the other synthetic resin and the two are connected.

[Brief explanation of the drawing]

The drawings show an embodiment of the elongated insulating sleeve band for an electrical connector according to the present invention, and FIGS. 1A and 2B are longitudinal cross-sectional views showing the insulating sleeve in a state before being crushed and in a fixed state, and FIG. 2 is a main part. 3 is a side view of the main part, Fig. 4 is a side view showing the manufacturing procedure, Fig. 5 is a vertical side view of the mold, Fig. 6 is a partially cutaway side view of the main part, FIG. 7 is a perspective view of essential parts showing another embodiment, and FIGS. 8 and 9 are longitudinal sectional views showing other embodiments of the insulating sleeve. 1...Synthetic resin insulating sleeve, 2...Synthetic resin band-shaped connecting plate part, 3...Insulating sleeve band, 4
A, 4B... Connecting band plate portion, 4b, 4b'... Opposing piece, 8A... Through hole, 8B... Projection.

Claims (1)

[Claims] 1 A plurality of synthetic resin insulating sleeves 1 for fixing and holding an electrical connector element in the inserted state are molded so as to be integrally connected by synthetic resin band-shaped connecting plate parts 2 at intervals. A connecting band plate portion 4A that constitutes an insulating sleeve band 3 of unit length and integrally projects from one end in the longitudinal direction of this insulating sleeve band 3 , and another insulating band plate portion 4A formed in the same manner as the insulating sleeve band 3 . Both the insulating sleeve bands 3, 3 can be connected by welding and integrally connecting the connecting band plate part 4B which is integrally projected from the other end of the sleeve band 3 in the longitudinal direction when the latter insulating sleeve band 3 is molded. It is a long insulating sleeve band for an electrical connector configured by integrally connecting them in the longitudinal direction. A protrusion 8B protruding in the thickness direction is formed, and the other connecting band plate part 4B is superposed and welded to each of the front and back surfaces of the one connecting band plate part 4A in the thickness direction. It is formed into a bifurcated shape with a pair of opposing pieces 4b, 4b', and each of the opposing pieces 4b, 4b' has a protrusion 8B provided on the one connecting band plate 4A. A matching through hole 8A is formed, and in a state where the protrusion 8B is engaged with the through hole 8A, both opposing pieces 4b, 4b' of the other connecting band plate 4B are connected to the one connecting band plate. The connecting portion 4A is configured to be held between the front and back surfaces, and the protruding end surface of the protruding portion 8B is configured to be substantially flush with the outer surface of the other connecting strip portion 4B in the thickness direction. A long insulating sleeve band for electrical connectors.