JPH055665Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is an invention of a replaceable power plug with a built-in glass tube fuse.

In the event that an abnormal load is placed on an electrical device, causing a malfunction, or if excessive current flows due to poor insulation in the wiring inside the device, a fuse should be installed in the plug to protect the device and ensure safety from fire, etc. This plug is characterized by the fact that the fuse can be installed, removed, and replaced safely and reliably, and the connection terminal is securely fixed to the plug body.

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, a box 2 molded from plastic is integrally fixed to a plug body 1, and consists of a plastic molded cover 3 holding a glass tube fuse 4 and three connection terminals 5, 6, and 7. ing. This box 2 has box holes 20, 21, 22, 23, and 24. Further, a fuse clip 8 and a blade terminal 6 which are crimped and fixed together, and a fuse clip 9 are inserted and fixed on the inner wall of the box 2. It is fixed through a mounting hole 27 formed in the fuse clip 8, and a stable electrical and mechanical connection is established.
The fuse clips 8, 9 and the blade terminal 6 have legs 28, 29, 30, 31, respectively, and when the fuse clip 8 and the blade terminal 6 are engaged with the box 2 and the fuse clip 9 is inserted, the legs 28 is inserted into the box hole 21, the leg 29 into the box hole 22, the leg 30 into the hole 23, and the leg 31 into the hole 24. After insertion, the leg 2
8, 29, 30, and 31 protrude from the back surface of the box 2 and serve to ensure sufficient fixation during molding of the plug body 1. After inserting the fuse clip 9, the contact contact 11 having spring properties is inserted through the box hole 25, and the contact contact 1 is inserted into the box hole 25.
A contact portion 13 provided on the fuse clip 1 pinches and fixes the bottom surface of the fuse clip 9 by pressure to establish an electrical and mechanical connection. Further, the contact 11 is provided with an electric wire connecting portion 12 to which an electric wire for external connection is connected by crimping. Further, a blade terminal 5 and a pin terminal 7 are integrally molded and fixed to the plug body 1 in a protruding manner, and like the contact contacts 11, each has an electric wire connecting portion 19 to connect an external electric wire by crimping.

The box 2 is provided with two pillar holes 17, into which the pillars 18 provided on the legs of the cover 3 shown in FIG. 6 are fitted. By fitting, the cover 3 can freely move within a range of 90° around the support 18. Further, this cover 3 is provided with a glass tube holding portion 16 for holding the glass tube fuse 4. As mentioned above, the cover 3 rotates around the pillar 18, so after holding the fuse inside the cover 3, the box 2
Move and fix. A convex portion 10 provided on the box 2 and a locking hole 14 provided on the cover 3 are fitted and fixed. The cover 3 is fixed in such a way that it cannot be removed without using a tool or the like, so there is no risk of it coming off during use. When fixing the cover 3, the fuse cap 15 held inside the cover 3 comes into pressure contact with the fuse clips 8 and 9, but these clips are made of a conductive material with spring properties, and the fuse cap 15 is pressed against the fuse clips 8 and 9. It is designed to ensure pressure contact with 8 and 9. The fuse tube body of the present invention is held on the inner surface of the cover 3 by the semi-ring shaped glass tube holding part 16 as described above, and the glass tube body is prevented from coming off when the cover 3 is opened and closed. Since the opening is provided in the direction perpendicular to the opening/closing direction of the cover 3, there is no possibility that the fuse clip will remain in the fuse clip.

[Brief explanation of the drawing]

Fig. 1 is a completed perspective assembled view showing an embodiment of the present invention, Fig. 2 is a perspective three-dimensional assembled view showing the structure of box 2, Fig. 3 is a partially cutaway perspective three-dimensional view of box 2, and Fig. 4 is a fuse. A perspective view showing the clip and the blade terminal, FIG. 5 a perspective view showing the contact, FIG. 6 a perspective three-dimensional view showing the fuse held with the cover 3, and FIG. 7 showing the legs protruding from the box 2. FIG. 8 is a perspective view showing the structure, and FIG. 8 is a perspective view showing the wire connection portion of the contact contact and the connection terminal. 1...Plug body, 2...Box, 3...Cover, 4...Fuse, 5, 6, 7...Connection terminal, 8, 9...Fuse clip, 10...Protrusion, 11...For contact Contact, 12... Wire connection part, 13... Contact part, 14... Locking hole, 15...
...Fuse cap, 16...Glass tube holding part, 17
...Strut hole, 18...Strut, 19...Wire connection part, 20, 21, 22, 23, 24...Box hole, 25...Protrusion, 26...Mounting hole, 27, 2
8, 29, 30...legs.

Claims (1)

[Scope of utility model registration request] A plug body made of an insulating material, a connecting terminal embedded in the plug body parallel to the connecting wire attachment direction and protruding from the plug body, and a pair of fuses fixed within the plug body and attached to the inner surface in parallel with the connecting terminal. A box provided with a clip, a cover that can be opened and closed by inserting and inserting a post into the lower end of the box, and a fuse base that is pressed into contact with the fuse clip while holding the glass tube body of the fuse, and the cover is opened and closed. A semi-ring shaped glass tube holder integrally molded on the inside of the cover has an opening perpendicular to the cover opening/closing direction to prevent the glass tube from detaching when the cover is inserted into the box. A replaceable power plug with a built-in glass tube fuse, the plug having a locking hole in the cover and a convex portion in the box.