JPS6121802Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a spring-type plug having a plug-in terminal formed in the shape of a banana tuft with a plurality of spring materials.To be more specific, this invention has a simple structure that reliably holds the plug-in terminal. The present invention also relates to a spring type plug that is extremely easy to assemble.

In a conventional spring-type plug, as illustrated in Fig. 1, a plug-in terminal made of multiple strips of leaf spring material is fixed to a support body equipped with an integrally molded metal mounting block. ing. That is, the mounting block has a base B from which the core rod A is integrally protruded, and this base B has a thin edge plate C surrounding the base of the core rod A with a gap. are integrally formed, and a threaded rod D is integrally formed on the other end side of the base B. The rear end of the plug-in terminal E, which is formed into a banana tuft shape using multiple strips of spring material, is inserted into the gap between the edge plate C and the core rod A, and is attached to the mounting block by caulking the edge plate C. Fixed. After fixing the conductor L to the threaded rod D with solder S, etc., cover a part of the base B, screw it onto the threaded rod D, and attach the conductor L.
An outer cylinder F made of synthetic resin is attached so as to enclose the joint between the two parts. However, although such a mounting block is small, e.g., about 25 mm in length, its structure is complex and its manufacturing process requires cutting, resulting in high costs. Furthermore, when attaching the plug-in terminal E to the mounting block, skill is required to caulk the edge plate C with enough force not to crush the core rod A and to fix the plug-in terminal E without rotating. . In addition, when attaching this plug to both ends of a single conductor, it is necessary to pass the conductor L through the outer cylinder F in advance and securely secure the conductor L to the threaded rod D, otherwise it will not be possible to insert it later. There were also difficulties in the work procedure.

Therefore, the purpose of this invention is to improve the drawbacks of the conventional spring-type plug and to provide a spring-type plug that has a simple structure and is extremely easy to assemble.

Hereinafter, one embodiment of this invention shown in the drawings will be described. The plug-in terminal 1 is made of a conductive plate spring material punched out so as to extend in all directions from the center part, and at a nearly right angle from the center part 2 serving as the tip. When folded, the overall shape becomes a bunch of bananas. 1 of the 4 leaf spring parts of plug-in terminal 1
One leaf spring part 3 is longer than the remaining three leaf spring parts 4, and a conductor fixing part 5, which is wider than the width of the leaf spring part, is formed at the rear end. Each rear end of the leaf spring portion 4 is formed with a bent portion 6 that is bent outward in the diametrical direction of the plug-in terminal 1 at a substantially right angle. A portion of the leaf spring portion 3 corresponding to the bent portion 6 also has a stepped portion 7 bent at a substantially right angle, and the rear end of the stepped portion 7 is bent outward in the diametrical direction. As shown in FIG. 4, the conductor fixing part 5 is
It is crimped so that the conductor 9 of the covered conductor 8 is housed and fixed therein.

The grip portion 11, which is a holder for the plug-in terminal 1, includes a terminal insertion portion 11 and a terminal holding portion 12 combined with the terminal insertion portion 11, each of which is made of electrically insulating synthetic resin. The terminal insertion part 11 includes a first base part 14 having a through hole 13 into which the plug-in terminal 1 is inserted, and a first extension part 15 that holds the end of the plate spring part 3 on the conductor fixing part 5 side. There is. In order to fit the stepped portion 7 of the leaf spring portion 3 and the bent portion 6 of the leaf spring portion 4 into the end of the through hole 13 of the first base portion 14 on the terminal holding portion 12 side, the through hole 1
A recess 16 having a diameter larger than 3 is formed.
A semicircular first long groove 17 is formed in the first extension part 15 so that its upper end communicates with the recess 16, and its lower end extends to the lower end of the first extension part 15. The rear end portion of the leaf spring portion 3 is fitted into the first long groove 17 . The terminal holding part 12 is located in the recess 1
6, and a second extension part 21 having a semicircular second long groove 20 such that its upper end extends to the periphery of the protrusion 18. has been done. The lower end of this second long groove 20 extends to the lower end of the second extension part 21,
Its diameter is the same as the diameter of the first long groove 17, and when the terminal insertion part 11 and the terminal holding part 12 are combined, the covered conductor 8 and the caulked conductor fixing part 5 are inserted into the first and second long grooves. Clamp and fix with 17 and 20. One end of a terminal core 22 to be inserted into the plug-in terminal 1 is indicated at the center of the tip of the protrusion 18 . The terminal core portion 22 may be formed integrally with the terminal holding portion 12 from the same material as shown in the figure.

When assembling this spring plug, first
As shown in the figure, the plate spring parts 3 and 4 are bent to form the plug-in terminal 1, and the conductor fixing part 5 of the plate spring part 3 is
Then, the conductor 9 of the covered conductor 8 is crimped so as to be wound inside the coated conductor 8 and fixed by pressure contact. Next, as shown in FIG. Insert the bent portion 6 until it abuts the side surface of the recess 16. At this time, the end of the conductor fixing part 5 of the leaf spring part 3 is attached to the first extension part 15.
into the first long groove 17 of. After inserting the plug-in terminal 1 into the terminal insertion part 11 through the grip part 10, insert the terminal core part 22 of the terminal holding part 12 into the center opening 23 formed by the plate spring parts 3 and 4 of the plug-in terminal 1. During insertion, the protrusion 18 fits into the recess 16 of the terminal insertion part 11. At the same time, the second extension part 21 of the terminal holding part 12 is fitted so that its second long groove 20 covers the upper surface of the leaf spring part 3 fitted in the first long groove 17, and the terminal insertion part is fitted with adhesive or the like. 11 and the contact surfaces of the terminal holding portion 12 may be adhered and fixed. In addition, the conductive wire 8 located between the first and second long grooves 17 and 20 may be held between the conductive wire 8 and the conductive wire 9 exposed between the lower end of the conductor fixing portion 5 and the covering portion of the covered conductive wire 8. Small protrusions may be formed in the first and second long grooves 17 and 20 to further securely hold the covered conductor 8 and the conductor 9.

As described above, in the spring-type plug of this invention, the insertion terminal and the conductor can be connected by simply caulking the conductor fixing portion, and soldering is not required as in the conventional method. Furthermore, assembly is very simple, just insert the plug-in terminal into the terminal insertion part and then place the terminal holding part on the terminal insertion part, so even those skilled in the art can assemble it quickly and easily. Can be done. Both the terminal insertion part and the terminal holding part are made of electrically insulating synthetic resin and can be molded with a simple mold, and their structure is simple, so they can be provided at low cost and in a compact size. Further, as mentioned above, the terminal core part can be integrally constructed of the same material as the terminal holding part, so in this case, the parts other than the plug-in terminal can be provided without using expensive metal materials. Furthermore, productivity can be improved and it can be provided at low cost.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an example of a conventional spring-type plug, Fig. 2 is a perspective view showing a plug-in terminal in an embodiment of this invention, and Fig. 3 is a longitudinal cross-section showing an exploded view of the knob. FIG. 4 is a perspective view for explaining the assembly, and FIG. 5 is a longitudinal sectional view showing the completed spring type plug. In the drawing, 1 is a plug-in terminal, 3 and 4 are leaf spring parts, 5 is a conductor fixing part, 6 is a bending part, 9 is a conductor, 1
0 is a knob portion, 11 is a terminal insertion portion, 12 is a terminal holding portion, 13 is a through hole, 16 is a recess, 17 is a first long groove, 20 is a second long groove, and 22 is a terminal core portion.

Claims (1)

[Scope of utility model registration request] A spring-type plug having a plug-in terminal formed into a pipe shape with a closed tip made of multiple strips of spring material extending in the axial direction, and an insulating support body supporting the rear end of the plug-in terminal, The rear end of one of the spring members is longer than the remaining spring members, and the rear end has a width sufficient to clamp and secure the conductor, and the rear end of the remaining spring member is longer than the remaining spring members. The support body is bent outward in the diametrical direction of the plug-in terminal, and the support body includes a first and a second member, and the first member has a through-hole into which the plug-in terminal is inserted, and a peripheral edge of the through-hole. a first recess into which the rear end of the long spring member is inserted;
A long groove is formed, and the second member has a protrusion that fits into the recess and whose tip abuts the bent portion, and a rear end of the long spring member that cooperates with the first long groove. a second long groove constituting a guide groove into which the plug is inserted, and the protruding part supports one end of a terminal core to be inserted into the plug-in terminal. .