JPH043464Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a transformer, and mainly relates to a relatively small transformer used as a power transformer, pulse transformer, input transformer, etc.

(b) Prior art and its problems Generally, when a small transformer such as the one described above is mounted on a part to be mounted, a transformer mounting bracket is used.

By the way, the conventional mounting bracket is
For example, as shown in Fig. 1, a strip-shaped steel sheet of a predetermined shape is bent at the center into a U-shaped cross section to form a holding frame part _a1 , and is attached to both ends of this U-shaped holding frame part _a1 . Form the pieces a ₂ and a ₂ , and also form the holding frame part
A mounting bracket A is formed by bending both side edges of _A1 inward to form a locking flange portion _A3 and a locking flange portion _A5 having a hook-shaped piece _A4 at the lower end. , and a mounting bracket B having a locking flange b ₁ and a cutout portion b ₂ and having a size that can be fitted directly between the mounting pieces a ₂ and a ₂ of the mounting bracket A. The upper and lower sides of the transformer C are arranged facing each other, and then the U-shaped holding frame a ₁ is attached to the iron core C ₁ of the transformer C.
The hook-shaped piece _a4 faces the notch _b2 and is bent to integrally lock and fix the mounting bracket A and the mounting bracket B.

However, when using a mounting bracket such as that shown in the prior art, the number of parts of the mounting bracket is two or more, and the surface area becomes large, which not only increases the material cost, but also increases the cost of the mounting bracket as described above. The flange parts _A3 , _A5 of A, the hook-shaped part _A4 , and the locking flange _B1 of the mounting bracket B need to be bent and formed into complicated shapes, which increases the number of processing steps and costs. In addition to being expensive, there were other problems such as the work of assembling the mounting brackets A and B to the transformer C was quite troublesome.

(c) Problems that the invention aims to solve The present invention was developed in view of the above circumstances, and its purpose is to minimize the number of parts and materials used, and to reduce the number of processing steps. It is an object of the present invention to provide a transformer with a simple mounting bracket that is easy to manufacture and also allows for simple and reliable assembly of the transformer.

(d) Means for solving the problem The transformer according to the present invention has an iron core inserted into the winding bobbin in a stacked manner through a square hole for inserting the iron core passing through the inside of the winding body of the winding bobbin. The transformer has a base plate made of thin steel plate with screw holes for mounting at both ends, a vertical wall protruding vertically from the peripheral edge of the base plate, and the vertical wall. A laminated core holding part having a beak that can be continuously protruded from one upper end and extended to be inserted into a winding insertion window of the laminated core installed on the base plate, and the base plate face each other. A mounting bracket includes a retaining part that is formed protrudingly on the peripheral edge and prevents the laminated core from coming off, and a plurality of positioning locking parts that protrude at predetermined positions on the base plate. It is characterized by having

(E) Embodiments Hereinafter, embodiments of the present invention will be specifically described based on the drawings.

In the drawings shown in FIGS. 2 and 3, reference numeral 1 denotes a winding bobbin integrally molded from a suitable synthetic resin. A winding trunk 3 and end flanges 4 and 5 protruding from both ends and an intermediate part of the winding trunk 3, respectively.
It consists of a partitioning flange 6 and underframes 7, 7 protruding from the outer peripheral surfaces of both end flange 4, 5, respectively,
A plurality of pin type terminals 9 are provided on the bottom surface of each underframe 7, 7...
...is installed protrudingly.

The winding drum 3 has a primary winding 10 between the end flange 4 and the partition flange 6, and a secondary winding 11 between the end flange 5 and the partition flange 6. wrapped,
The respective lead-out ends of the primary winding 10 and the secondary winding 11 are connected to the pin type terminal as appropriate.

Reference numeral 12 is fitted into the winding bobbin 1 in a stacked manner through the square hole 2 for passing through the iron core, and has a winding passing window 12.
This is an EI type laminated core in which a is formed. Note that an insulating tape (not shown) is attached to the outer surfaces of the primary winding 10 and the primary winding 11.

All of the above are well-known winding bobbins for pin-type small transformers.

Now, 13 is a mounting bracket made of thin steel plate,
It has a substantially rectangular substrate portion 14, and opposing longitudinal peripheral edges 14a of the substrate portion 14,
14a has respective peripheral edges 14a, 14a.
A laminated core holding portion 15 and a retaining portion 1 are located approximately in the center of the
6 is formed in a protruding manner.

The laminated core holding part 15 includes a vertical wall 17 which is integrally connected to the base plate and is formed in a protruding manner so as to rise vertically over approximately the width l of the laminated core, and a vertical wall 17 at the upper end of the vertical wall 17. A beak piece 18 that can be continuously protruded from one location and extends parallel to the upper surface of the base plate 14 at a predetermined distance to be inserted into the winding insertion window 12a of the laminated core placed on the base plate 14. A laminated core holding portion 15 having a laminated core holding portion 15 is provided. In other words,
The distance between the laminated core holding part 15 and the top surface of the board part 14 is equal to the width t of the frame piece 12b of the laminated core 12 that just fits between the laminated core holding part 15 and the board part 14.
The base plate part 14 and beak piece 18 of the mounting bracket 13 can be inserted lightly into the frame piece 12b of the laminated core 12 from above and below, respectively. The beak piece 18 has a depth m of the laminated core 12 that it holds.
The length is determined to be appropriate.

Further, the retaining portion 16 is provided on the base plate portion 14 by the laminated iron core 1.
2 is placed on the substrate part 14, and the retaining part 16 and the vertical wall 17 are used to prevent the front and back of the laminated iron core 12 relative to the mounting bracket 13 between them. This makes it possible to eliminate relative deviations in direction.

Further, positioning locking portions 19 (there are four in this embodiment) are protruded on the substrate portion 14, and these positioning locking portions 19 allow the lamination of the substrate portion 14 to be The iron core 12 can be positioned by eliminating relative displacement in the left and right directions. The positioning locking portions 19 can be easily manufactured by press working a thin steel plate.

The substrate portion 14 has screw holes 20, 20.
are drilled, and the transformer according to the present invention can be installed on a part (not shown) of the required equipment to be installed and fixed with screws through the screw holes 20, 20.

Therefore, when assembling the transformer, after winding the primary winding 10 and the secondary winding 11 around the rectangular cylindrical winding body 3 of the winding bobbin 1 and connecting them to the pin type terminal 9. , the E-shaped member 12e and the I-shaped member 12i constituting the EI-type core 12 are inserted one by one into the core insertion square hole 2 of the winding bobbin 1 and its outer periphery from opposite sides to form a laminated structure. The iron core 12 is formed. In this case, of course, E-shaped member 1
It is necessary to insert the I-shaped member 2e and the I-shaped member 12i alternately from opposite directions so that they overlap each other.

Next, the mounting bracket 13 is inserted from the side position of the frame piece 12b of the laminated core 12 as shown in FIG. The state will be as shown in Figure 3. After that, the retaining portion 16 of the mounting bracket 13 is bent into an upright position as shown by the imaginary line 16', and the laminated core 1 is removed from the mounting bracket 13.
2 from coming off, and the stopper part 16 and the vertical wall 17
As a result, relative displacement of the laminated core 12 with respect to the mounting bracket 13 in the front and rear directions can be eliminated.

Furthermore, when the mounting bracket 13 is inserted as shown in FIG.
It is positioned to eliminate relative displacement in the left and right directions. Therefore, the laminated core holding part 15, the retaining part 16, and the positioning locking part 19...
By working together with the above, it becomes possible to position and assemble the laminated core 12 extremely easily and reliably.

When using the transformer with the mounting bracket 13 assembled in this way,
The lower surface of the board part 14 is installed on the part to be mounted (not shown) of the required equipment, and is fixed with screws through the screw holes 20, 20, thereby completing a series of installation operations.

(f) Effects of the invention As described above, the transformer according to the invention has an extremely simple configuration, which minimizes the number of parts and materials used, reduces the number of processing steps, and is easy to manufacture. The cooperation of the holding part, the retaining part, and the positioning locking part has the practical effect of providing a transformer with a mounting bracket that can be easily and reliably positioned and assembled.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional mounting bracket, Figs. 2 and 3 show an embodiment of the transformer according to the present invention, and Fig. 2 shows the winding bobbin before assembly and the installation. FIG. 3 is a perspective view showing the assembled transformer. 1... Winding bobbin, 2... Square hole for inserting the iron core, 3
... Winding drum part, 12 ... Laminated core, 12b ... Frame piece part, 13 ... Mounting bracket, 14 ... Board part, 15 ... Laminate core holding part, 16 ... Removal prevention part,
17... Vertical wall, 18... Beak piece, 19... Positioning locking part.

Claims (1)

[Scope of utility model registration request] A transformer in which the core is inserted into the winding bobbin in a laminated manner through a square hole for inserting the core through the winding body of the winding bobbin, the thin steel plate having mounting screw holes at both ends. a vertical wall formed to protrude vertically from the peripheral edge of the substrate, and a laminated iron core that is continuous and protrusive from one upper end of the vertical wall and is installed on the substrate. a laminated core holding part having a beak extending to be inserted into the winding insertion window of the base plate, and a laminated core holding part having a beak protrudingly formed on opposing peripheral edges of the base plate part and preventing the laminated core from coming out. A transformer comprising a mounting bracket including a retaining portion and a plurality of positioning locking portions protruding from predetermined positions on the substrate portion.