JPS6326937Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a terminal device and a washer mounting structure.

(Prior art) Conventionally, in a configuration in which a shaft protruding from a knob is screwed onto an insulating base, and a washer fitted onto the same shaft is crimped onto the terminal surface of the base to tighten the conductor, it is necessary to remove the washer from the shaft before screwing the shaft. In order to prevent the washer from escaping or moving, a locking ring made of polyester film is fitted on the same shaft, or a small diameter part is formed on the shaft and this small diameter part protrudes into the inner diameter of the washer. A structure is known in which a washer is fixed to a shaft by engaging small protrusions that are formed on the shaft.

(Problems to be solved by the invention) In the case of the conventional structure as described above, the number of parts and the number of steps for fitting the ring are increased, and it is difficult to fit the ring into the small diameter part. However, there is a problem in that the strength of the shaft in that part decreases.

SUMMARY OF THE PRESENT EMBODIMENT In view of the above problems, it is an object of the present invention to provide a terminal device in which the washer will not come off the shank when inserted into the shank of the knob body.

[Structure of the idea]

(Means for Solving the Problems) The terminal device of the present invention has a shaft portion of a knob body screwed onto an insulating base, and a washer inserted through the shaft portion is crimped onto a terminal provided on the insulating base. In the terminal device for connecting a conducting wire, an annular large-diameter portion is formed in the shaft portion of the knob body, and the large-diameter portion is inserted into the inner periphery of the shaft hole of the washer that is inserted into the shaft portion. A large number of cut grooves are radially formed to facilitate elastic deformation around the shaft hole of the saw, and the large annular diameter portion of the shaft is inserted into a washer due to the elastic deformation around the shaft hole. It is characterized in that it is held by the shaft portion.

(Function) In the terminal device of the present invention, when the washer is inserted into the shaft portion of the knob body, the annular large-diameter portion formed in the shaft portion is elastically deformed in the cut groove around this portion at the position of the shaft hole of the washer. The shaft hole expands and passes through the shaft hole, and when the annular large diameter part passes through the shaft hole, the shaft hole returns to its old position due to the elasticity of the cut groove and shrinks, causing the washer to enlarge the annular diameter of the shaft part. The shaft part is engaged with the shaft part and held on the shaft part.

(Example) The configuration of an example of the present invention will be described with reference to the accompanying drawings.

1 and 2, reference numeral 1 denotes an insulating base having a long and thin plate portion 2, mounting boss portions 3 formed at both ends, and a tightening portion protruding from the back surface at appropriate intervals with a screw hole 4 formed in the center. It is composed of a boss 5.

In FIGS. 3 and 4, reference numeral 6 denotes a terminal, which includes a contact portion 8 having a through hole 7 in the center, and engaging pieces 9, 10 bent opposite to each other on both sides of the contact portion 8 and cut and raised respectively.
It is formed by terminal piece parts 11 and 12 which are provided protrudingly. Then, as shown in FIG. 2, the contact part 8 is brought into contact with the base body 1 such that the through hole 7 of the contact part 8 matches the screw hole 4 of the boss 5, and the terminal piece parts 11, 12 are brought into contact with the base body 1.
are fitted into and fixed in the mounting holes 13 and 14 of the base body 1.

In FIGS. 1, 2, and 5, reference numeral 15 denotes an electrically insulating knob body, which is integrally connected to a cylindrical head 17 having a rosette 16 formed on its outer circumferential surface and from the center of an end surface 18 of this head 17. A hexagonal spanner engagement hole 20 with an open upper end is formed in the head 17, and a tapered small diameter part 21 is formed at the tip of the shaft 19. An annular large diameter portion 22 is formed at the base with a small gap between it and the end surface 18 of the head 17.
Further, the slightly distal end of this annular large diameter portion 22 and the small diameter portion 2
A threaded portion 23 that is screwed into the threaded hole 4 of the boss 5 is formed between the bosses 5 and 1.

In FIGS. 2, 6, and 7, reference numeral 24 denotes a metal washer, which includes a disk portion 25 that comes into contact with the end surface 18 of the knob body 15, and an outer periphery of the disk portion 25 that is bent to one side into a cylindrical shape. A shaft hole 27 is formed in the center of the disk portion 25 through which the shaft portion 19 of the knob body 15 is inserted, and a large number of cut grooves 28 are formed on the inner periphery of the shaft hole 27. are formed radially. Further, a large number of sawtooth biting teeth 29 are formed on the opening end surface of the peripheral wall portion 26 .

Next, the operation of the above embodiment will be explained.

The shaft portion 19 of the knob body 15 is inserted into the shaft hole 27 of the washer 24, and the shaft hole 27 in which a number of grooves 28 are formed is expanded at the position of the annular large diameter portion 22 of the shaft portion 19, and the shaft hole 27 is passed through. , the disk portion 25 of the washer 24 is supported between the end surface 18 of the knob body 15 and the annular large diameter portion 22, and the shaft portion 1 is supported so that the washer 24 does not move.
Hold it at 9. Next, a hexagonal spanner is engaged with the spanner engagement hole 20 of the head 17 of the knob body 15, and the shaft portion 19 is inserted into the screw hole 4 of the boss 5 through the through hole 7 of the terminal 6.
Screw together. At this time, since a tapered small diameter portion 21 is formed at the tip of the shaft portion 19, insertion is easy. By rotating the knob body 15 and threading the screw portion 23, the conductive wire (not shown) inserted between the contact portion 8 of the terminal 6 and the biting teeth 29 of the washer 24 is strongly tightened, and the biting teeth 29 It is held so that it does not slip out.

[Effect of idea]

According to the present invention, when the shaft of the knob body is inserted into the washer, the large annular diameter portion of the shaft pushes open the shaft hole of the washer through its radial cut groove and is inserted into the shaft. The inserted washer engages with the large-diameter annular portion of the shaft and does not escape from the shaft.
The washer can be held on the shaft of the knob body. Therefore, the washer can be engaged with the shaft without increasing the number of parts by fitting a washer retaining ring onto the shaft or reducing the strength by forming a small diameter part for engaging the washer on the shaft. This can improve work efficiency.

[Brief explanation of drawings]

FIG. 1 is a plan view of a terminal device showing an example of the implementation of the present invention, FIG. 2 is a front view of a portion of the same, FIG. 3 is a side view of the terminal, and FIG. 4 is a front view of the same.
FIG. 5 is a plan view of the knob body, FIG. 6 is a partially cutaway front view of the washer, and FIG. 7 is a plan view of the same. DESCRIPTION OF SYMBOLS 1... Insulating base, 6... Terminal, 15... Knob body, 19... Shaft part, 22... Annular large diameter part, 24...
... Washer, 27 ... Shaft hole, 28 ... Cut groove.

Claims (1)

[Scope of utility model registration request] In a terminal device in which a washer inserted through the shaft is crimped onto a terminal provided on the insulating base and a conductor is connected by screwing the shaft of the knob to the insulating base, the shaft of the knob has an annular shape. A large diameter portion is formed, and a number of cut grooves are provided on the inner periphery of the shaft hole of the washer that is inserted into the shaft portion to facilitate elastic deformation around the shaft hole in order to insert the large diameter portion. 1. A terminal device characterized in that the terminal device is formed in a radial shape, and the large diameter annular portion of the shaft portion is inserted into a washer by elastic deformation around the shaft hole, and the washer is held in the shaft portion.