JPH0810171Y2 - Transformer fuse mounting structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a transformer fuse mounting structure for mounting a temperature fuse that detects a temperature and shuts off when a temperature exceeds a predetermined temperature to a frame of a transformer. It is about.

[Prior Art] FIG. 4 is a perspective view of a main part showing a fuse mounting structure of a conventional transformer, and FIG. 5 is a vertical sectional side view taken along line VV of FIG. In the figure, the resin frame 1 is an inner frame 1a.
And the outer frame 1b, the primary side coil 3a is wound around the inner frame 1a,
A secondary coil 3b is wound around the outer frame 1b, the outer frame 1b is covered on the outer side of the inner frame 1a, and the EI core 2 is fitted into the through hole 15 of the inner frame 1a to support it. The terminals 1 and 4 on the primary side and the secondary side are mounted in a protruding state on both frames 1a and 1b.

Reference numeral 6 is a temperature fuse that detects the temperature and cuts off when the temperature exceeds a predetermined temperature, and lead wires 7 and 7 extend from both ends thereof. In mounting the thermal fuse 6, conventionally, an insulating polyester film 8 is attached and fixed to the outside of the primary coil 3a through an adhesive tape 9, and the thermal fuse 6 mounted on the core 2 is mounted.
The lead wires 7 and 7 extending from both ends of the above are placed on the polyester film 8 and the tips thereof are wound around the terminal 4 on the primary side, and further the lead wires 7 and 7 are attached from the outside thereof. The thermal fuse 6 was attached to the inner frame 1a by pressing it with the adhesive tape 10.

[Problems to be Solved by the Invention] In the fuse mounting structure of the conventional transformer as described above, since the adhesive tape 10 is required to hold down the lead wire 7 of the thermal fuse 6, the mounting work of the thermal fuse 6 is troublesome. In addition, since the adhesive tape 10 is used for fixing, the positioning and holding of the thermal fuse 6 is likely to be uncertain due to displacement of the adhesive position of the tape 10 and deterioration of the adhesive force.

Further, the root portion of the lead wire 7 extending from both ends of the thermal fuse 6 is bent from the joint portion with the thermal fuse 6, and is damaged at the bent portion, and the predetermined function as the thermal fuse 6 is lost. There was a possibility that it would end up.

The present invention has been made in view of the above circumstances, and thus provides a fuse mounting structure for a transformer, which can easily and reliably position and hold the thermal fuse by a simple operation and can be mounted without causing damage. The purpose is to do.

[Means for Solving the Problems] In order to achieve the above-mentioned object, a fuse mounting structure for a transformer according to the present invention supports a core of the transformer, and at one axial end of a frame body around which a coil is wound, With a pair of locking claws, a temperature fuse that detects temperature and shuts off
The roots of the lead wires extending from both ends are placed on one end of the frame body while being locked by the locking claws, and the lead wires cross the coil. By winding the wire around a predetermined terminal attached to the other end of the body, tension is applied in the locking direction with the locking claw at the root of the lead wire.

[Operation] According to the present invention, the root portions of the lead wires extending from both ends of the thermal fuse are mounted on the frame body while being locked by the pair of locking claws provided on the frame body. , The adhesive tape is not used by winding the leading end of the lead wire around a predetermined terminal mounted on the frame so as to apply tension to the root of the lead wire in the direction of locking with the locking claw. However, the thermal fuse can be securely attached and held at a predetermined position.

Further, since the lead wire does not bend at the joint with the thermal fuse but extends straight to the left and right and then is bent, there is little damage due to bending at the joint with the fuse.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a fuse mounting structure of a transformer according to the present invention, and FIG. 2 is a vertical sectional side view of an essential part of FIG. 1, in which 1 to 7 are FIGS. 4 and 5. Since it is the same as the conventional example shown by, the same reference numerals are given to corresponding parts,
The detailed description thereof is omitted.

In FIGS. 1 and 2, a flat portion 12 is formed so as to project in the axial direction at one axial end of the inner frame 1a around which the primary coil 3a is wound, and the primary terminal 4 projects at the other end. Has been set up,
A pair of hook-shaped locking claws 11, 11 are integrally formed on the flat portion 12. The distance L between the outer surfaces on both sides of the locking claws 11, 11 is
As shown in FIG. 3, the width is set to be larger than the width 1 of the thermal fuse 6.

Next, the procedure for mounting the thermal fuse 6 will be described.

The insulating polyester film 8 is applied to the outside of the primary coil 3a wound around the inner frame 1a, and the end portion 8a thereof is attached to the inner frame 1a.
The thermal fuse 6 is mounted on the brim portion 16 and the root portions 7a, 7a of the lead wires 7, 7 are locked by the pair of locking claws 11, 11 as shown in FIG. While placing it on the inner frame 1a with the lead wires 7 and 7 against the end portion 8a of the polyester film 8, the tip portions thereof are connected to the terminal 4 on the primary side while straddling the coil 3a. By winding it, the locking claws 1 are attached to the root portions 7a, 7a of the lead wires 7, 7.
The thermal fuse 6 is attached to the inner frame 1a by applying tension in the locking direction with respect to the screws 1 and 11.

In this way, the thermal fuse 6 has the root portions 7a, 7a of the lead wires 7, 7 locked to the pair of locking claws 11, 11 provided on the inner frame 1a, and the lead wire root portions 7a, 7a, By attaching to the inner frame 1a so as to apply tension in the locking direction to 7a, without using the conventional adhesive tape 10 (Fig. 5),
The thermal fuse 6 can be easily and surely attached to the frame 1. Further, since the root portions 7a, 7a are locked to the locking claws 11, 11, it is possible to prevent the lead wires 7, 7 from being bent and damaged from the joint 17 with the thermal fuse 6.

Further, in this embodiment, since the end portion 8a of the polyester film 8 is pressed by the lead wires 7 and 7, the film 8 is firmly fixed without using the conventional adhesive tape 9 (Fig. 5). can do.

[Advantage of Invention] As described above, according to this invention, it is not necessary to use an adhesive tape when mounting the thermal fuse.
It can be installed easily with less labor,
The positioning and holding of the temperature fuse is reliable, and troubles such as displacement during use can be avoided. Also, set the root of the lead wire extending from both ends of the thermal fuse to 1
By locking with a pair of locking claws, there is no damage due to bending at the joint between the lead wire and the fuse,
A predetermined function as a thermal fuse can be ensured.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a fuse mounting structure for a transformer according to the present invention, FIG. 2 is a vertical sectional side view of a main part, and FIG.
FIG. 4 is an enlarged plan view of a main part, FIG. 4 is an exploded perspective view showing a fuse mounting structure of a conventional transformer, and FIG. 5 is V- of FIG.
It is a vertical side view along the V line. 1 ... frame, 2 ... core, 3 ... coil, 4,5 ... terminal, 6 ... temperature fuse, 7 ... lead wire, 7a ... root, 11 ... locking claw.

Claims (1)

[Scope of utility model registration request] 1. A thermal fuse that supports a core of a transformer and has a pair of locking claws provided at one axial end of a frame around which a coil is wound, and has a temperature fuse that detects a temperature and performs a breaking operation. The lead wire extended from the base is placed on one end of the frame in a state of being locked by the locking claws. A fuse mounting structure for a transformer, characterized in that tension is applied to a root portion of a lead wire in a locking direction with a locking claw by winding the wire around a predetermined terminal mounted on the other end.