JP2009187686A - Display device mounting structure for fusion cutting of tubular fuse with l-shaped terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device mounting structure for fusion cutting of a tubular fuse with terminals that is improved to allow a fusion cutting display device to be easily retrofitted to a tubular fuse of a standard product. <P>SOLUTION: Dowel-like projections 5b are formed on leg piece parts 5a of mounting plates 5 fitted to circumferential surfaces of conductive caps 4a arranged at both ends of the fusion cutting display device 4; dowel holes 3a are formed on L-shaped terminals 3 of a tubular fuse 1 oppositely to the dowel-like projections 5b; and the fusion cutting display device 5 is detachably attached by pressing the dowel-like projections 5b of the mounting plates 5 in the dowel holes 3a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fusing display device mounting structure applied to a cylindrical fuse with an L-shaped terminal.

A fusing display device (also known as a “fusing display fuse”) is prepared as an accessory for visually confirming the fusing operation state of the cylindrical fuse described above (see, for example, Patent Document 1).
Next, FIG. 4 shows a conventional assembly structure in which a fusing display device is mounted on the cylindrical fuse (see, for example, Non-Patent Document 1). 4 (a) to 4 (d), reference numeral 1 is a fuse element, a cylindrical fuse formed by attaching a conductive cap 2 to both ends of a fuse cylinder containing arc-extinguishing sand, and 3 is caulked to the conductive cap 2. L-shaped terminals connected to both ends of the cylindrical fuse 1, 4 is a blown display device (fused display fuse) assembled in the side of the cylindrical fuse 1 and connected in parallel, 4 a is its blown display bar, and 5 is a blown display device 4 It is a mounting plate for assembling to the cylindrical fuse.
Here, stud bolts 6 are preliminarily implanted (welded) on the peripheral surface of the conductive cap 2 attached to both ends of the cylindrical fuse 1, and when assembling the fusing display device 4, A hairpin-shaped conductive mounting plate 5 wound around the peripheral surface of the conductive cap 4 b is fastened to the stud bolt 6 with a nut 7. The detailed structure of the fusing display device 4 and the fusing display operation are described in Patent Document 1, and the description thereof is omitted here.
JP-A-5-62588 Online product catalog “Fuji low-voltage current limiting fuse”, issued in April 2007, Fuji Electric Equipment Co., Ltd., [online], [searched on December 17, 2007], Internet <URL: HYPERLINK "http: // www. fujielectric.co.jp/fcs/jpn/edc/catalog2/EH300r.pdf/EH300r#all.pdf "http://www.fujielectric.co.jp/fcs/jpn/edc/catalog2/EH300r.pdf/EH300r# all.pdf>, pages 41-42 / 60

Incidentally, the conventional fusing display device mounting structure shown in FIG. 4 has the following problems.
In other words, the manufacturer of cylindrical fuses prepares a standard type of cylindrical fuse that is not compatible with a fusing display and a model of a cylindrical fuse with a fusing display equipped with a fusing display. In the manufacturing process, the stud bolt 6 shown in FIG. 4 is welded to the conductive cap 2 of the fuse body 1, and the fusing display device 4 is attached to the stud bolt 6 according to the customer's order and the product is shipped. I am doing so. In contrast, the standard type fuse is not provided with the stud bolt 6.
For this reason, users who have purchased a standard cylindrical fuse cannot purchase a fusing display device after the purchase, and purchase a model with a fusing display device in order to use the fusing display device. There is a need.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a fuse display device mounting structure for a tubular fuse with a terminal which is improved so that even a standard fuse can be easily retrofitted in consideration of user convenience. .

  In order to achieve the above object, according to the present invention, dowel-like projections are formed on the leg pieces of the mounting plate fitted to the peripheral surfaces of the conductive caps provided at both ends of the fusing display device. A dowel hole is formed in the L-shaped terminal of the cylindrical fuse, and the dowel-shaped protrusion of the mounting plate is fitted into the dowel hole so that the fusing display device is detachably conductively connected to the cylindrical fuse.

According to the above configuration, a standard cylindrical fuse that does not include the stud bolt 6 of FIG. 4 can be blown out as necessary only by forming a small dowel hole in the L-shaped terminal of the cylindrical fuse. The display device can be easily retrofitted in combination with the mounting plate.
Therefore, the manufacturer can prepare a cylindrical fuse having a structure in which a dowel hole is formed in the terminal board of the fuse body as a standard product, so that both the use and nonuse of the fusing display device can be supported. In other words, it is possible to ship with a fusing display device attached to a standard product according to the user's order, or a user who has purchased a standard product without a fusing display device purchases only a fusing display device separately as necessary. It can be easily retrofitted on the side. As a result, serviceability to the user can be improved, and it is not necessary for the manufacturer to prepare a different model according to the user's usage, thereby reducing the production and management costs of the product.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on the examples shown in FIGS. In addition, in the figure of an Example, the same code | symbol is attached | subjected to the member corresponding to FIG. 4, and the description is abbreviate | omitted.
That is, in the illustrated embodiment, the terminal 3 stands up as shown in FIGS. 2 (a) and 2 (b) with respect to the L-shaped terminal 3 arranged at both ends of the cylindrical fuse 1 and clamped to the conductive cap 2. A small diameter dowel hole 3a is formed in advance on the part plate surface in two left and right positions. The dowel hole 3a may be either a through hole or a concave recess hole. On the other hand, the mounting plate 5 used when the fusing display device 4 is assembled to the cylindrical fuse 1 is a sheet metal processed product in which a conductive plate having a spring property (for example, a stainless steel plate) is formed in the shape shown in FIG. Here, an arcuate clip portion is formed on the upper end side of the mounting plate 5 so as to be fitted to the conductive cap 4a of the fusing display device 4, and the leg piece portion 5a that is bent in an L shape and extends laterally therefrom. The dowel-shaped protrusions 5b are formed so as to be aligned with the dowel hole 3a. Note that two types of mounting plates 5 for the front and the rear are prepared corresponding to the mounting positions on the cylindrical fuse 1.
When the fusing display device 4 is assembled to the cylindrical fuse 1, the leg pieces 5 a of the mounting plate 5 are overlapped from the front and rear sides of the cylindrical fuse 1 to the end surface of the upright portion of the L-shaped terminal 3. The protrusion 5b is fitted into a dowel hole 3a formed in the L-shaped terminal 3 and press-fitted. Next, the fusing display device 4 is inserted into the clip portion across the two attachment plates 5 coupled to the front and rear ends of the cylindrical fuse 1, and the attachment plate 5 is attached to the conductive cap 4a disposed at both ends thereof. The clip portion is fitted and conductively coupled. As a result, the fusing display device 4 is assembled to the side of the cylindrical fuse 1 via the mounting plate 5 in a parallel connection state.

  When the blowout display device 4 is removed from the cylindrical fuse 1, it can be easily removed by pulling out the dowel-shaped protrusion 5 b formed on the leg piece 5 a of the mounting plate 5 from the dowel hole 3 a of the L-shaped terminal 5. it can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a mounting structural view of a fusing display device according to an embodiment of the present invention, where (a) is a side view of a state where a fusing display device is attached to a cylindrical fuse, (b) is a plan view thereof, and (c) is a plan view of (a). End view FIG. 2 is an assembly structure diagram of a conductive cap and an L-shaped terminal of the cylindrical fuse in FIG. 1, (a) and (b) are an end view and a side view, respectively. FIG. 1 is an external perspective view of a mounting plate of a fusing display device in FIG. FIG. 2 is a view showing a conventional fusing display device mounting structure in which (a) is a side view of an assembled state in which a fusing display device is attached to a cylindrical fuse, (b) is a plan view thereof, and (c) is an end view of (a); (D) is an end view of the cylindrical fuse showing a state in which the fusing display device and the mounting plate are removed from (c).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylindrical fuse 2 Conductive cap 3 L-shaped terminal 3a Dowel hole 4 Fusing display 4a Conductive cap 5 Mounting plate 5a Leg piece part 5b Dowel-shaped protrusion

Claims (1)

A fusing display device mounting structure applied to a cylindrical fuse with an L-shaped terminal, wherein dowel-shaped protrusions are formed on leg pieces of a mounting plate fitted to the peripheral surfaces of conductive caps provided at both ends of the fusing display device In addition, a dowel hole is formed in the plate surface of the L-shaped terminal so as to face the dowel-shaped protrusion, and the dowel-shaped protrusion of the mounting plate is fitted into the dowel hole so that the fusing display device is connected to the terminal of the cylindrical fuse. A fusing display device mounting structure for a cylindrical fuse with an L-shaped terminal, which is detachably conductively coupled to a plate.

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