JPS6345729A - Fuse withdrawer - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handling equipment that also serves as a wire breakage check for automotive blade fuses.

[Conventional technology]

Traditionally, glass tube fuses sealed in glass tubes have been used as automobile fuses, but recent trends in automobile technology include a shift to electronic sterilization for various control 2I1 functions, and electronic components compatible with new functions. The electrical wiring of automobiles has become more complex due to the expansion of electrical circuits and the multiplexing of electrical circuits to improve safety.As a result, the number of fuses has also increased, forcing fuse boxes to become larger. Due to the social situation where cars demand energy conservation, it has become common for cars to use blade fuses to make cars smaller and lighter. Although the purpose of miniaturization was achieved by adopting this blade fuse, due to its small size, it was difficult for an operator to pick it up and replace it with their fingers, unlike in the case of conventional glass tube fuses.
In particular, it became impossible to extract the fuse, and a fuse extraction device specifically for blade fuses, commonly known as a blur, came to be attached to the fuse box as a necessity. As shown in FIG. 4, the blade fuse 10 is composed of a cover 11, a pair of terminal portions 12.13, and a bridge portion or fuse portion 14 connecting both terminal portions □. One end of the cover 13 protrudes and is integrally formed with transparent plastic so as to wrap around the fuse part 14.
On the rear end side, the head 15 is formed with a step 16.17, and a recess 18.19 is formed in the end surface of the head, and the rear ends of the terminal portions 12.13 are exposed in the recess. ing. Note that the current capacity required for blowing the fuse portion 14 can be arbitrarily set by appropriately adjusting its thickness or width. The conventional fuse extraction device described above has the structure shown in FIG. 5 and is made of relatively elastic plastic. That is, a pair of plate-shaped clamping members 1.2 are formed into a substantially U-shape as a whole, and have claw portions 3.2 facing each other on the inside of their tips.
4 are provided. When extracting the blade fuse 10 with the fuse extractor having such a configuration, the gripping member 1.
The elasticity of 2 pushes the tips apart, and the claws 3 and 4 cross over the head 15 and engage with the stepped portions 16 and 17, and are held in the state shown by the imaginary lines in FIG. 5, and in this state. By pulling out the fuse extraction device in the direction shown by arrow A, the blade fuse can be extracted. [Problems to be Solved by the Invention] However, the use of this blade fuse gives rise to other unresolved problems. In other words, as mentioned above, today's automobile electrical circuits have become more complex. - Multiple devices may be connected to the circuit, and - multiple fuses may be connected to the device. The problem is that it has become extremely difficult to determine which fuse has blown out due to the occurrence of a problem in a fuse box where two blade fuses are adjacent to each other. In particular, when the blade fuse is attached to a fuse box, it is impossible to see the fused portion at all, so it is impossible to discover a blown fuse by inspecting the fuse box. Means for Solving the K Problem The main point is that the fuse burnout detection device is equipped with a fuse breakage detection device consisting of a pair of contact terminals and a notification member. The above-mentioned problems are solved by making it possible to discover blade fuses easily and quickly. X Embodiment Next, the present invention will be explained in detail based on the illustrated embodiment. In order to facilitate understanding, the same parts as in the conventional example will be described with the same numbers. In the figure, cylinders @1.2 are a pair of clamping members, and 3 and 4 are claws provided on the inner side of their tips, which are made of a suitable plastic so as to have an abbreviated shape as a whole. As a fuse disconnection detection device attached to the rear end side of the holding member 1.2 formed in this way, for example, grooves 1a and 2a are provided inside the rear end side, respectively, and a device that engages the grooves is provided. A printed circuit board 5 is also provided. This printed circuit board 5 includes a pair of contact terminals 6.7, and a notification member 8 such as a light emitting diode to display and notify that a fuse has blown.
and a resistor 9 for limiting the current, the contact terminals 6 and 7 are projected into four parts 1b provided on the rear end surfaces of the holding members 1 and 2, and the recessed part 1b is connected to the blade. Formed to a size that fits the head 15 of the fuse 10,
The distance between the contact terminals 6 and 7 is the same as that of the blade fuse 1.
The interval corresponding to the recess 18, 19 provided on the end face of
(see FIG. 2), and the notification member 8 is provided on the claw portion 3.degree. 4 side of the printed circuit board 5 so that it can be easily recognized by the user. FIG. 3 shows a contact terminal 6 mounted on the printed circuit board 5.
, 7 is a schematic circuit diagram illustrating wiring showing mutual connections between a notification member 8 (light emitting diode) and a resistor 9, and the principle of operation for checking a blade fuse 10. As is clear from this figure, the contact terminal 6 is connected to the resistor 9,
Furthermore, after being connected to the notification member 8, it is connected to the contact terminal 7. The notification member used here is an example of the use of light emitting diodes, and the illustration of two light emitting diodes connected in opposite directions is a complication for the operator to judge the positive and negative poles of the power supply. This is to prevent the contact terminals 6 and 7 from being negative, and regardless of which of the contact terminals 6 and 7 is the positive electrode, the light emitting diode in the forward direction will emit light to achieve its purpose. In practice, it is preferable from the standpoint of process and usage to use two light emitting diode chips with the wiring described above sealed in a single case. Furthermore, the purpose can of course be achieved even if a sounding device such as a buzzer is used instead of the light emitting diode 8 for black light display as the notification member. Further, as another embodiment, a contact terminal may be provided at the same tip as the claw portion. In the figure, numeral 20 is a power supply, and 30 is a load.

[For production]

Next, the operation of the fuse extraction device of the present invention will be described. First, with the blade fuse 10 to be checked still installed in the switch box, fit the recess 1b on the rear end side of the fuse extractor into the head 15 of the blade fuse 10 and bring it into contact, as shown in Figure 3. If the contact terminal 6°7 contacts the terminal portion 12.13 as shown in the figure, and the fuse portion 14 of the blade fuse is not blown, it means that the terminal portion 12.13 is short-circuited at the fuse portion 14. , no potential difference occurs between both terminal portions 12 and 13, and the light emitting diode 8 does not light up. However, if the fuse part 14 of the blade fuse that was brought into contact was blown,
The power supply voltage of the power supply 20 is connected to the ground between the contact terminals 6.7 by a circuit that connects the power supply voltage to the ground through the load 30. A voltage is generated, the light emitting diode lights up, and it can be confirmed that the fuse part 14 is blown. At this time, the fuse extraction device is reversed, the head 15 is engaged and held between the claws 3 and 4 at the tip, the blade fuse is extracted, and the blade fuse is replaced with a new blade fuse. (Effect 1 of the Invention As explained above, the fuse extraction device according to the present invention has a fuse consisting of a pair of contact terminals and a notification member on the rear end side of the fuse extraction device equipped with a pair of clamping members having claws at the tips. By providing a disconnection detection device, by simply bringing the rear end side into contact with the head end surface of the blade fuse, it is possible to check whether the fuse has blown out with a clear display or notification of flashing or extinguishing on the warning member. It has an excellent effect of being able to perform the work easily and quickly without requiring any specialized knowledge.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the fuse extraction device according to the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a schematic diagram of the device in use. FIG. 4 is a partially cutaway perspective view of a commonly used blade fuse, and FIG. 5 is a side view of a conventional fuse extraction device. 1.2... Holding member 3, 4... Claw part 5.
...Printed circuit board 6.7...Contact terminal 8...
Notification member 9...Resistor patent applicant Stanley Electric Co., Ltd. Figure 4, Figure 51!1 ρ

Claims (2)

[Claims] (1) A fuse extraction device having claws inside the tips of a pair of clamping members, characterized in that a fuse disconnection detection device comprising a pair of contact terminals and a notification member is provided at the rear end of the clamping members. Fuse extractor. (2) Claim (1) characterized in that the pair of contact terminals and the notification member are arranged on opposite sides of a printed circuit board that is a mounting member for these.
Fuse extraction device as described in section.