JPH04179106A - Transformer - Google Patents

Abstract

PURPOSE:To eliminate the need of winding tying work and, at the same time, to simplify winding pulling-around work by smashing the head section of a terminal after the terminating section of winding is passed through the head section inserted into a hole provided in a flange section so as to electrically connect the terminal and winding to each other. CONSTITUTION:An opening 8b is extended to the end face of a lower flange section 8 from a hole 8a. The head section 2 of a terminal 1 is inserted into the hole 8s so that a notch 2a can be set to the position of the opening 8b. Winding 10 is wound around the barrel section 6 of a bobbin 5 and the terminating section 10a of the winding 10 is put in the head section 2 through the notch 2a. After the terminating section 10a of the winding 10 is passed through the head section 2 of the terminal 1, the head section 2 is smashed with a pressing jig inserted into the opening section 8b in the direction shown by the arrow so that the head section 2 of the terminal 1 is press-contacted with the terminating section 10a of the winding 10. As a result, the terminal 1 and winding 10 are electrically connected to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a transformer used in switching regulator circuits and the like.

Conventionally, as this type of transformer, those shown in FIGS. 8 and 9 have been known. This transformer is bobbin 30
, a pin terminal 31 and a winding 32, and both ends 32a of the winding 32 wound around the body 30a of the bobbin 30 extend along the groove 33 provided on the end face of the lower flange 30b of the bobbin 30. It was routed around and tied to a pin terminal 31 inserted into the bottom of the bobbin 30.

However, since the pin terminal 31 has a function of attaching a transformer to a printed wiring board or the like, a certain size range from the tip of the pin terminal 31 is set as an area in which the winding cannot be twisted. Moreover, when the both end portions 32a of the winding 32 are routed along the groove 33 of the bobbin 30, the accuracy of the routing position is important. The work is complex. The above points have been a very big problem when promoting automatic winding.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a transformer that eliminates the work of tying off the end of the winding, which is an obstacle to automatic winding, and simplifies the work of routing the end of the winding.

The terminal is composed of a terminal having a substantially cylindrical head, a flange provided with a hole for inserting the head of the terminal and an opening for crushing, and a body integrated with the flange. a bobbin,
and a winding wound around the body of the bobbin, and the end of the winding is passed through the head of the terminal inserted into the hole provided in the flange, and the head is crushed to form a terminal. It is characterized in that it is electrically connected to the winding.

The head of the terminal is crushed with a jig inserted through the crushing opening provided in the collar, and the head of the terminal is crimped to the end of the winding to establish an electrical connection between the terminal and the winding. It will be planned. After crushing the head of the terminal, soldering the end of the winding to the head of the terminal will make the electrical connection more reliable.

Embodiment One embodiment of the transformer according to the present invention will be described below with reference to the accompanying drawings.

First, as shown in FIGS. 1 and 2, a terminal 1 used in a transformer consists of a substantially cylindrical head 2 and a pin-shaped foot 3. The head 2 is provided with a notch 2a along the axial direction. The foot portion 3 is provided on the head 2 on the opposite side of the notch 2a. Copper, brass, or the like is used as the material for the terminal 1.

Next, this terminal 1, as shown in FIGS. 3 and 4,
Attached to the transformer body. The transformer body includes a bobbin 5 and a winding 10. The bobbin 5 is composed of a body 6 and an upper flange 7 and a lower flange 8 provided at both ends of the body 6.

A hole 8a for inserting the head 2 of the terminal 1 is provided at the edge of the lower flange 8, and this hole 8a is formed into an opening 8 for crushing.
It is connected to b. The opening 8b extends from the hole 8a to the end surface of the lower flange 8. The head 2 of the terminal 1 is inserted into the hole 8 so that the notch 2a is set at the position of the opening 8b.
It is inserted in a. The bobbin 5 has a winding 1 on the body 6.
0 is wound, # of winding 10 @ 810 a
is inserted into the head 82 through the notch 2a.

Next, as shown in FIG. 5, with the terminal end 10a of the winding 10 inserted into the head 2 of the terminal 10, a holding jig (not shown) is inserted into the opening 8b from the direction of the arrow in the figure. ) to crush the head 2 of the terminal 1 and the winding 10.
The terminal end portion 10a of the holder is crimped.

In this way, the terminal 1 and the winding 10 are electrically connected.

Furthermore, if the head 2 of the terminal I and the terminal end 10a of the winding 10 are soldered as necessary, a more reliable electrical connection can be obtained.

In this way, a transformer is obtained that does not require any tying work and does not require windings to be routed along the groove provided in the collar.

Note that the transformer according to the present invention is not limited to the above-mentioned embodiments, and can be variously modified within the scope of the gist. For example, as shown in FIG. 6, the terminal 1 may have the foot portion 3 provided at a right angle to the notch 2a. Further, as shown in FIG. 7, in order to prevent the terminal 1 from rotating in the direction of the arrow, a circular protrusion 2b is provided on the head 2 on the opposite side of the notch 2a, and a circular protrusion 2b is provided on the head 2 on the opposite side of the notch 2a. A semicircular recess 8c may be provided at the position and engaged with each other. Furthermore, the head of the terminal may be shaped like a rectangular tube.

(2) As is clear from the above explanation, according to the present invention, the head of the terminal through which the terminal end of the winding is passed is crushed and the terminal end and the terminal are crimped to make an electrical connection. Therefore, the work of winding the windings, which was conventionally done, becomes unnecessary, and the work of routing the windings is also simplified. Moreover, since there is no tangle work, there is no need to worry about the winding being tangled in the tangle-prohibited area of the terminal.

Therefore, a transformer that can easily be adapted to automatic winding can be obtained.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the transformer according to the present invention, and Figures 1 and 2 are a front perspective view and a right side view of terminals used in the transformer, respectively. A perspective view, Figure 3 is a front view of the transformer, Figures 4 and 5 are
The figure is a partially enlarged perspective view showing the procedure for electrically connecting the terminal and the terminal end of the winding. FIGS. 6 and 7 are a perspective view and a plan view, respectively, showing modified examples of terminals used in the transformer. FIGS. 8 and 9 are a front view and a partially enlarged perspective view, respectively, of a conventional example as seen from the bottom. 1... Terminal, 2... Cylindrical head, 5... Bobbin, 6...
...Body section, 8.. Lower flange section, 8a.. Hole, 8h.. Opening for crushing, 10.. Winding wire, 10a.. End section. Patent applicant Murata Manufacturing Co., Ltd.

Claims (1)

[Claims] 1. A bobbin comprising a terminal having a substantially cylindrical head, a flange provided with a hole for inserting the head of the terminal and an opening for crushing, and a body integrated with the flange. , a winding wound around the body of the bobbin, and the end of the winding is passed through the head of the terminal inserted into the hole provided in the collar, and the head is crushed to form a terminal. A transformer characterized by electrically connecting a wire and a winding.