JP2921438B2 - Fuse holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuse holder provided in the middle of a cord for supplying direct current or alternating current to electronic equipment.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view showing the structure of a conventional fuse holder. In FIG. 4, a fuse holder 2 is provided at the ends of cords 1a and 1b for connecting a direct current (DC) supply terminal of an electronic device and a DC power supply DC output terminal.
Is arranged. A tube fuse 3 is built in the fuse holder 2. The fuse holder 2 is formed by, for example, transparent plastic molding, and has cylindrical and bag-shaped holder members 2a and 2b which are detachably attached by screws or uneven fitting. A through hole 4a is formed at an end of the holder member 2a, and a cord 1 is inserted into the through hole 4a.
a. A coil spring 5 having elasticity against pressure is inserted through the cord 1a, and a contact terminal 6a of a metal disk is soldered to an end of the cord 1a. In this case, the diameter of the contact terminal 6a is larger than the diameter of the coil spring 5, so that the coil spring 5 does not come out of the contact terminal 6a, and the contact terminal 6a contacts the end (electrode) of the tube fuse 3 and It is designed to be pressed. The holder member 2b also has a through hole 4b formed at an end thereof, and the cord 1b is inserted through the through hole 4b. A contact terminal 6b of a metal disk is soldered to the end of the cord 1b.

The function of the fuse holder configured as described above will be described below.

A coil spring 5 and a contact terminal 6a are housed in a holder member 2a. Further, the contact terminal 6b is also housed in the holder member 2b. Then, the holder member 2a
A tube fuse 3 is built therein, and the holder members 2a and 2b are connected (fixed) by screws or concave and convex fittings (not shown). As a result, the contact terminals 6a,
The tube fuse 3 is arranged between 6b. In this case, the contact terminals 6a and 6b contact the electrodes of the tube fuse 3 and are pressed by the elasticity of the coil spring 5, so that the contact terminals 6a and 6b electrically and stably electrically contact the electrodes of the tube fuse 3. Is held. As described above, even in the above-described conventional fuse holder, the tube fuse 3 can be stably and reliably held in the fuse holder 2.

[0005]

However, in the conventional fuse holder, when the holder members 2a and 2b are separated from each other, the cord 1a, the coil spring 5, and the contact terminal 6a protrude from the holder member 2a. Similarly, from the holder member 2b, the cord 2b and the contact terminal 6b
May protrude, and the contact terminals 6a and 6b may come into contact with a metal part of the electronic device provided with the fuse holder, thereby causing a short circuit. In other words, tube fuse 3
There is a drawback that the workability when incorporating the device is poor.

The present invention has been made to solve the above-mentioned conventional problems, and does not cause the internal cord, coil spring, contact terminal, and the like to fly out, and to prevent the short circuit when the tube fuse is not built-in. An object of the present invention is to provide an excellent fuse holder with improved performance.

[0007]

In order to achieve the above object, a fuse holder according to claim 1 is a fuse holder having a tube fuse built in first and second holder members that are detachably mounted. The first holder member has a coil spring for pressing the tube fuse inserted into the cord inserted through the through-hole, the first contact terminal is connected to the end of the cord, and the tube fuse is free. The first contact terminal is provided so that the first contact terminal abuts thereon so that the first contact terminal does not come off. The second holder member is connected to the cord inserted through the through hole, and the second contact terminal is connected to the first holder terminal. In addition, the configuration is such that a second projection is provided to contact the second contact terminal so as not to come off.

According to a second aspect of the present invention, the first and second holder members are formed by plastic molding, and the first and second projections are formed by plastic molding of the first and second holder members. It is a configuration provided integrally.

According to a third aspect of the present invention, there is provided a fuse holder, wherein a ring member is used as the first and second projections, and the ring member is inserted and fixed inside the first and second holder members.

[0010]

Therefore, according to the present invention, the first and second holder members are connected, and the tube fuse 13 is arranged between the first and second contact terminals. In a state in which the first and second holder members are separated from each other, the first and second contact terminals contact the first and second projections provided integrally when the first and second holder members are molded with plastic. Touch Alternatively, the first and second contact terminals come into contact with the first and second protrusions that fix the ring member inside the first and second holder members, and the cord, the coil spring, and the first and second contact terminals. Does not protrude from the first and second holder members. Therefore, when the tube fuse is not installed, the protruding first and second contact terminals do not come into contact with the metal part of the electronic device in which the fuse holder is provided. Is improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the fuse holder according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view showing a configuration of an embodiment of a fuse holder according to the present invention. In FIG. 1, a fuse holder 12 is disposed at an end of cords 11a and 11b for connecting a direct current (DC) supply terminal of an electronic device and a DC output terminal of a DC power supply. This fuse holder 1
2 has a tube fuse 13 built therein. Fuse holder 1
Reference numeral 2 includes cylindrical and bag-shaped holder members 12a and 12b which are formed by, for example, transparent plastic molding and which can be detachably attached by screws or concave and convex fittings. The holder member 12a has a through hole 14a formed at an end thereof, and the cord 11a is inserted into the through hole 14a. A coil spring 15 having elasticity against pressure is inserted through the cord 11a, and a contact terminal 16a, which is a metal disk, is soldered to an end of the cord 11a. In this case, the diameter of the contact terminal 16a is larger than the diameter of the coil spring 15, so that the coil spring 15 does not come out of the contact terminal 16a.
As described below, the contact terminal 16a is connected to the tube fuse 13
And is pressed against the end (electrode) of the first electrode.
The holder member 12b also has a through hole 14b formed at an end thereof, and the cord 11b is inserted into the through hole 14a. The metal disk contact terminal 16b is soldered to the end of the cord 11b. Also, the holder member 1
Inside the 2a, triangular projections 18a and 18b are provided to allow the tube fuse 13 to freely pass therethrough and prevent the contact terminal 16a from protruding in the direction of the opening into which the tube fuse 13 is inserted. ing. Similarly, holder member 1
Triangular projections 19a and 19b are also provided inside 2b so that the tube fuse 13 can freely pass through and the contact terminal 16b does not protrude in the direction of the opening into which the tube fuse 13 is inserted. ing. This holder member 12
The protrusions 18a and 18b provided inside a may be provided at two opposing positions as shown in the drawing, or may be provided in a ring shape. The projections 18a, 18
When two are provided, b is integrally formed when the holder member 12a is molded with plastic.

In this case, the coil spring 15 is formed by post-processing.
From the opening for inserting the tube fuse 13 in the holder member 12a to the depth of the projections 18a and 18b (through hole 14a).
Direction) and insert the cord 11a into the through hole 14a.
Through the coil spring 15 to project from the opening. Thereafter, the contact terminal 16a is soldered to the end of the cord 11a. Then, the contact terminal 16a is tilted obliquely and inserted between the protruding portions 18a and 18b, and the assembling is performed. The holder member 12b is assembled in the same manner.

When the projections 18a and 18b are provided in a ring shape, the contact terminals 16a cannot be tilted obliquely and cannot be inserted between the projections 18a and 18b. Therefore, each of the holder members 12a and 12b is divided into two semi-circles and molded into plastic, and the coil spring 15, the cord 11a and the contact terminals 16a are housed therein, and then completed by high-frequency welding or the like. Further, the holder member 12b is assembled in the same manner. As another method, the holder members 12a and 12b may be formed in two cylindrical bodies, and the holder members 12a and 12b may be completed one by one by high frequency welding or screwing or fitting of unevenness.

FIG. 2 is a sectional view showing another example of the configuration of the holder member 12a. In FIG. 2, in this example, the projections 18a and 18b are not provided on the holder member 12a, and after the coil spring 15, the cord 11a and the contact terminal 16a are stored in the holder member 12a, the tube fuse 13 freely passes therethrough. The ring member 20 is fixed by press-fitting, bonding with an adhesive, high-frequency welding, or the like.

Next, the function of the configuration of this embodiment will be described. FIG. 3 is a sectional view showing a state in which the tube fuse 13 is built in the fuse holder 12. In FIG. 3, a coil spring 15 and a contact terminal 16a are housed in a holder member 12a. Further, the contact terminal 16b is also housed in the holder member 12b. And the holder member 1
2a, a tube fuse 13 is built in, and a holder member 12a,
12b is connected (fixed) by a screw (not shown) or a concave and convex fitting. Thereby, the tube fuse 13 is arranged between the contact terminals 16a and 16b in the fuse holder 12. In this case, the contact terminals 1 are connected to both ends of the tube fuse 13.
The contact terminals 6a and 16b are brought into contact with each other and pressed by the elasticity of the coil spring 15, so that the contact terminals 16a and 16b are securely and stably electrically contacted with the electrodes of the tube fuse 13 and held. When the tube fuse 13 is not built in the fuse holder 12, that is, the holder member 1
In the state where 2a and 12b are separated from each other, the contact terminal 16a is in contact with the projections 18a and 18b of the holder member 12a, so that the cord 11a, the coil spring 15 and the contact terminal 16a in the holder member 12a do not protrude. Similarly, the cord 11b and the contact terminal 16b do not protrude from the holder member 12b. Therefore, the contact terminals 16
The a and 16b do not contact the metal part of the electronic device on which the fuse holder 12 is provided, and no short circuit occurs.
That is, workability at the time of incorporating the tube fuse 13 is improved.

[0017]

According to the present invention, as is apparent from the above-described embodiment, when the first and second holder members are separated from each other, the first and second protrusions in the first and second holder members are formed on the first and second projections. The first and second contact terminals come into contact with each other, and the cord, coil spring, and first and second contact terminals do not protrude from the first and second holder members. The first and second contact terminals do not contact the metal part of the electronic device provided with the fuse holder;
No short circuit occurs. In other words, there is an effect that workability at the time of incorporating the tube fuse is improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of an embodiment of a fuse holder of the present invention.

FIG. 2 is a sectional view showing another configuration example of the holder member in the embodiment.

FIG. 3 is a cross-sectional view showing a state in which a tube fuse is built in a fuse holder in the embodiment.

FIG. 4 is a cross-sectional view showing a configuration of a conventional fuse holder.

DESCRIPTION OF SYMBOLS 11a, 11b Code 12 Fuse holder 13 Tube fuse 12a, 12b Holder member 14a, 14b Through hole 15 Coil spring 16a, 16b Contact terminal 18a, 18b, 19a, 19b Projection 20 O-ring member

Claims (3)

(57) [Claims] 1. A fuse holder having a tube fuse built in first and second holder members detachably configured, said first holder member including said tube fuse in a cord inserted through a through hole. A coil spring for pressing is inserted, the first contact terminal is connected to the end of the cord, and the tube fuse is freely inserted and the first contact terminal is prevented from coming out. A second projection is provided, and the second holder member has a second contact terminal connected to a cord inserted through a through-hole, and a second contact member that contacts the cord so that the second contact terminal does not come off. A fuse holder, wherein a projection is provided. 2. The method according to claim 1, wherein the first and second holder members are formed by plastic molding, and the first and second projections are integrally provided when the first and second holder members are molded by plastic. The fuse holder according to claim 1, wherein: 3. The fuse holder according to claim 1, wherein a ring member is used as the first and second projections, and the ring member is inserted and fixed inside the first and second holder members.