JP2622502B2 - Transformer frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer frame, and more particularly, to forming a winding by winding a conductive wire around a coil bobbin a predetermined number of times, and applying an electromagnetic steel sheet to a core winding portion of the coil bobbin a predetermined number of times. The present invention relates to a frame for fixing a wound iron core type transformer formed by winding a wound iron core.

[0002]

2. Description of the Related Art There has been provided a wound iron core type transformer in which an electromagnetic steel sheet such as a silicon steel sheet is wound around a winding to form a wound iron core. For example, Japanese Patent Application No. 6-11 of the present applicant
No. 7032, as shown in FIG. 5, has a rectangular shape provided with a pair of core winding portions 1a, 1a and a pair of connecting portions 1b, 1b connecting the core winding portions 1a, 1a at intervals. A transformer having a frame-shaped coil bobbin 1, a winding 2 formed on the outer periphery of the coil bobbin 1, and winding cores 2, 2 formed on core winding portions 1a, 1a, respectively, has been proposed.

[0003]

In this wound iron core type transformer, in order to securely hold the wound iron core 2 in a state wound around the coil bobbin 1 and to attach or arrange it at a desired position,
It is preferable that the coil bobbin 1 and the wound core 2 be assembled to a frame. On the other hand, the winding generates heat when energized,
It is necessary to efficiently dissipate this heat when assembled to a frame.

[0004] In view of these points, the present invention can reliably hold the wound core wound around the coil bobbin, can be securely mounted and arranged at a desired location, and is excellent in heat dissipation. Another object of the present invention is to provide a transformer frame that can be manufactured at low cost.

[0005]

According to a first aspect of the present invention, there is provided a rectangular frame-shaped coil bobbin including a pair of core winding portions and a connecting portion for connecting the core winding portions at intervals. A frame for a transformer in which a winding is formed on the outer periphery and a winding core is formed in each of the core winding portions, and a coil bobbin on which the winding and the winding core are formed is placed, and both ends of the winding core are mounted. A substrate member provided with a pair of cut-and-raised portions that are in contact with each other, a long pressing portion, and a tightening member including a pair of connecting portions formed by bending both ends of the pressing portion; Wherein the connecting portions are fastened to the cut-and-raised portions, and both sides of the holding portion are brought into contact with the outer periphery of the pair of winding cores, and the winding core is sandwiched between the holding portion and the substrate member. A dexterous frame is provided.

A second aspect of the present invention relates to a pair of core winding portions,
A coil bobbin in the form of a rectangular frame having a connecting portion for connecting the core winding portion at an interval, a winding formed on the outer periphery of the coil bobbin, and a winding core formed on each of the core winding portions. A dexterity frame, a pair of substrate members each in contact with the end face of the wound core, fastening means for urging the substrate members in directions approaching each other, a long pressing portion, And a fastening member having a pair of connecting portions formed by bending both ends of the portion, and fastening the pair of connecting portions to the substrate member, respectively, and contacting both sides of the pressing portion with the outer periphery of the wound core. The present invention provides a transformer frame in which a winding core is sandwiched between a holding portion and a substrate member.

According to a third aspect of the present invention, there is provided a transformer frame according to the first or second aspect, wherein a narrow portion is provided in at least a part of a length direction of the pressing portion.

According to a fourth aspect of the present invention, in the first to third aspects, the pressing portion presses the pair of wound cores toward the substrate member in a direction at an angle of about 45 ° with the direction away from each other. And a frame for a transformer.

[0009]

In the transformer frame of the first aspect, the pair of connecting portions of the fastening member are fastened to the cut-and-raised portions of the substrate member, and both sides of the holding portion are brought into contact with the outer periphery of the pair of wound cores. Since the winding core is sandwiched between the holding portion and the substrate member, the winding core formed on the coil bobbin is securely fixed by the substrate member and the fastening member. In the frame according to the first aspect, the cut-and-raised portion is provided on the board member as described above, and the fastening member is fastened to the cut-and-raised portion, so that the length of the board member in the longitudinal direction increases. No material can be saved.

In the transformer frame according to the present invention, the pair of substrate members abutting on the end face of the wound core are urged by a fastening means in such a manner as to be close to each other, and the pair of connecting portions of the fastening member are respectively connected to the substrate. Since the core is fastened to the member and the core is held between the holding part of the fastening member and the substrate, the core formed on the coil bobbin is securely fixed by the substrate and the fastening member. Further, in the frame according to the second aspect, since the pair of board members are arranged on the end surface of the wound core and fastened by the fastening means as described above, the board member is enlarged even when the length of the wound core is long. And the material required to form the frame is saved.

In the transformer frame according to the third aspect of the present invention, since the narrow portion is provided in at least a part of the length of the pressing portion in the length direction, the heat generated by the winding at the time of energization is reduced between the narrow portion and the winding core. The heat is radiated from the gap formed in the transformer, and the heat radiating property when the transformer is used is good.

In the transformer frame according to the present invention, the winding core is pressed toward the substrate member in a direction at an angle of about 45 ° with the direction in which the pair of winding cores are separated from each other. The iron core is firmly fixed, and the wound iron core and the coil bobbin are securely maintained in close contact with each other.

[0013]

Next, the present invention will be described in detail based on an embodiment shown in the drawings. 1A and 1B show a first embodiment of the present invention. The transformer fixed by the frame 10 includes a pair of core winding portions 11a, 11a,
A connecting portion 11b for connecting the core winding portion at an interval;
11b and a coil bobbin 11 made of resin and having a rectangular frame shape.
It has. A groove 1 is formed on the outer periphery of the coil bobbin 11.
1c is provided, and a winding is formed by winding a conducting wire a predetermined number of times in the groove 11c, and the outer periphery of the winding 12 is covered with an insulating member 13. In addition, the core winding part 11
In a and 11a, wound iron cores 14 and 14 are formed by winding an electromagnetic steel sheet such as a silicon steel sheet a predetermined number of times. In addition,
In the drawing, reference numeral 16 denotes a lead wire provided with a terminal 17 at the tip.

The frame 10 for fixing the wound iron core type transformer includes a substrate member 19 and a fastening member 20.
The substrate member 19 is formed by punching a metal plate material and bending it, and has a substantially rectangular shape as a whole. Board member 19
Is provided with a pair of cuts 19a at positions symmetrical with respect to a center line C in the length L direction.
The portions provided with a and 19a are cut and raised substantially vertically toward both ends in the length L direction of the substrate member 19 to form a pair of cut and raised portions 19b and 19b. Further, by providing the cut-and-raised portions 19b, 19b, a pair of openings 19c, 19c are formed in the substrate member 19. The distance between the cut-and-raised portions 19b, 19b is set to be slightly larger than the length of the wound core 14, and both end faces 14 of the wound cores 14, 14 mounted on the substrate member 19 are set.
The cut-and-raised portions 19b, 19b are in contact with the a, 14a via an insulating material (not shown) such as paper. Screws 21 are provided at the central portions in the width direction of the cut-and-raised portions 19b.
Are provided with a pair of through holes 19d.

Large diameter mounting holes 22a, 22b, 22c and 22d are provided in the vicinity of the four corners of the substrate member 19, and bolts (not shown) inserted into the mounting holes 22a to 22d allow the frame 10 to be mounted. Can be fixed to a desired mounting position.

The board member 10 is formed by bending both ends in the width W direction upward in the drawing to form folded portions 19e.

The fastening member 20 is formed by punching and bending a metal plate material in the same manner as the substrate member 19, and has a long holding portion 2 having a length corresponding to the length of the core 4.
0a and a pair of connecting portions 20b, 20b formed by bending both ends of the holding portion 20a at substantially right angles. The cut-and-raised portion 19 is connected to the connecting portions 20b and 20b.
A pair of long holes 20c, 20c are provided at the same interval as the pair of through holes 19d, 19d provided in b, 19b.

On the other hand, a narrow portion 20d having a reduced width is provided at a central portion in the length direction of the pressing portion 20a.

The connecting portions 20b, 20b of the tightening member 20
Is the window 1 of the coil bobbin 11 placed on the substrate member 19.
1d, and is superimposed on the outside of the cut and raised portions 19b, 19b. Further, the elongated holes 20c, 20
c and the through holes 19d, 19d, screws 21 are screwed into the cut-and-raised portions 19b, 19b.
b. At this time, the tightening member 20 is
(B) The cut-and-raised part 1 is pulled down in the middle and downward direction.
Since the connecting portions 20b and 20b are fastened to the connecting portions 9b and 19b, as shown in FIG. 2, the pressing portion 20a is curved with the upper portion being convex. For this reason, both end surfaces 14a, 14a of the respective wound iron cores 14, 14, among both side portions of the holding portion 20a.
The side portions 20e, 20f, 20g, and 20h are wound core 1
4 and 14, the substrate member 19 and the holding portion 20
a, a wound iron core 14,1 formed on the coil bobbin 11
4 is pinched.

As shown in FIG. 1 (B), when the frame 10 to which the transformer is fixed is viewed from the front side, portions 20e, 20e, which are in contact with both sides of the pressing portion 20a and the wound cores 14, 14 are provided. A straight line P1 connecting 20f and the center O of the wound iron cores 14, 14 is a straight line P connecting the center O of the wound iron cores 14, 14.
2, that is, the angle θ between the wound cores 14 and 14 in the direction away from each other is about 45 °, and the wound cores 14 and 1
4 is pressed toward the substrate member 19 in the direction of the straight line P1.

In the frame 10 of the first embodiment, the cores 14, 14 formed on the coil bobbin 11 are brought into line contact with the substrate member 19, respectively.
On the side of the end surfaces 14a, 14a, the pressing portions 20a of the fastening members 20 are partially brought into contact with the outer circumferences of the wound cores 14, 14, so that the wound cores 14, 14 are located between the substrate portion 19 and the fastening members 20. It is configured to be pinched. Therefore, the frame 10 can securely and firmly fix and hold the wound cores 14, and furthermore, the coil bobbin 11 formed with the wound cores 14. Particularly, as described above, since the pressing portion 20a of the fastening member 20 presses the wound cores 14, 14 at an angle of about 45 ° with respect to the horizontal line P2, the wound cores 14, 14 are firmly fixed to the substrate member 19. Thus, the position of the wound iron cores 14, 14 with respect to the substrate member 19 does not shift due to some vibration or the like.

Further, since the frame 10 is provided with the mounting holes 22a to 22c as described above, the transformer firmly fixed as described above can be securely and easily mounted at a predetermined position.

Further, in the frame 10 of the first embodiment,
As described above, since the wound cores 14 and 14 are sandwiched between the substrate member 19 and the fastening member 20, the wound cores 14 and 14 are firmly fastened to the core winding portions 11a and 11a. Therefore, if the transformer is fixed to the frame 10, the core 1
Adhesion between the coil bobbins 11, 14 and the wound iron cores 14, 14 and the coil bobbin 11 is maintained, so that damage to the coil bobbin 11 due to vibration or the like can be prevented, and deterioration of the insulation characteristics of the transformer can be prevented.

Further, in the frame 10 of the first embodiment,
By providing the pair of cut-up portions 19b, 19b as described above, the openings 19c, 1
9c and the narrow portion 20d is provided in the holding portion 20a of the fastening member 20 as described above, so that the heat generated by the wound cores 14, 14 and the winding 12 at the time of energization is reduced by the above-described wound core. The heat is efficiently radiated through the outer circumferences of the fourteenth and fourteenth embodiments.

Further, in the frame 10 of the first embodiment, as described above, the pair of cut-and-raised portions 1
9b, 19b, and the cut-and-raised portions 19b, 19b
In this configuration, the length L of the substrate member 19 does not increase, and the material cost can be reduced.

Next, a second embodiment of the present invention shown in FIGS. 3A and 3B will be described. In the second embodiment, the coil bobbin 11, the wound iron core 14, the conductor 12 and the like to be assembled to the frame 30 are the same as those in the first embodiment, and the same members are denoted by the same reference numerals. Also, this second
The frame 30 of the embodiment includes a substrate member 31 and a fastening member 32, as in the first embodiment.

The substrate member 31 is formed by punching a metal plate material and bending it, and has a substantially rectangular shape as a whole.
Cutouts are provided at both ends in the length L direction of the substrate member 31, and the cutout portions are raised almost vertically toward the central portion in the lengthwise direction, so that a pair of cut-up portions 31 a,
31a are formed. The cut-and-raised portions 31a, 31
The distance between "a" and "a" is set slightly larger than the length of the wound cores 14 and 14. Both ends 14a and 14a of the wound cores 14 and 14 mounted on the substrate member 31 are covered with an insulating material (not shown). The cut-and-raised portions 31a are in contact with each other. Through-holes 31b, 31 for screwing the screws 33 are provided in central portions in the width direction of the cut-and-raised portions 31a, 31a.
b is provided. Also, folded portions 31c, 31c are provided on both sides of the substrate member 31 in the width W direction. further,
At four corners of the board member 31, mounting holes 34a, 34b, 3
4c and 34d are provided.

The tightening member 32 has the same shape as the holding portion 20 of the frame 10 of the first embodiment. That is, the pressing portion 32 of the second embodiment is formed by punching and bending a metal plate material, and has a long pressing portion 32a having a length corresponding to the length of the wound iron cores 14; It has a pair of connecting portions 32b, 32b formed by bending both ends of the portion 32a at substantially right angles. This connecting portion 32b,
32b is provided with a pair of long holes 32c, 32c at the same interval as the pair of through holes 31b, 31b provided in the cut and raised portions 31a, 31a. Further, a narrow portion 32d having a reduced width is provided at a central portion in the length direction of the pressing portion 32a.

The connecting portions 32b, 32b of the tightening member 32
Is the window 1 of the coil bobbin 11 placed on the substrate member 31.
1d, and is superposed on the outside of the cut-and-raised portions 31a. The elongated holes 32c, 32c
c and screws 33, 33 are screwed into the through holes 31b, 31b,
With the fastening member 32 pulled down in FIG.
The cut-and-raised portions 31a, 31a and the connecting portions 32b, 32b are fastened. For this reason, the pressing portion 32a is curved in a state in which the upper portion is convex, and the portions on both end surfaces 14a, 14a side of the wound cores 14, 14, among the both side portions of the pressing portion 32a, come into contact with the outer periphery of the wound cores 14, 14. I have.

As shown in FIG. 3A, a straight line P1 connecting a portion where both sides of the holding portion 32a and the outer periphery of the wound cores 14 and 14 contact with the center O of the wound iron cores 4 and 4, and a horizontal line The angle θ formed by P2 is about 45 °
Is pressed toward the substrate member 31 in the direction of the straight line P1.

In the second embodiment, the wound cores 14 and 14 are brought into line contact with the substrate member 31 and the respective wound cores 14 and 1
Since the pressing core 32 is partially brought into contact with the outer periphery on the side of the end faces 14a, 14a of the core 4, the cores 14, 14 are sandwiched between the fastening member 32 and the substrate member 31, so that the cores 14, 14, and thus this wound iron core 14,1
The coil bobbin 11 formed with 4 is securely and firmly fixed.
Can be held. In particular, the pressing portion 32a
Winding cores 14, 14 at an angle of about 45 ° with respect to the horizontal line P2
, The wound iron cores 14 and 14 are firmly
1 and wound cores 14, 14 by some vibration or the like.
Does not shift with respect to the substrate member 31.

In the frame 30 of the second embodiment, since the wound iron cores 14 are sandwiched between the tightening member 32 and the substrate member 31 as described above, the wound iron cores 14, 14 are wound around the core winding portion of the coil bobbin 11. 11a, 11a is firmly tightened. Therefore, if the transformer is fixed to the frame 30, the adhesion between the wound iron cores 14, 14 and the coil bobbin 11 is maintained, and the coil bobbin 11 is prevented from being damaged by vibration or the like.
The deterioration of the insulation characteristics of the transformer can be prevented.

Further, in the frame 30 of the second embodiment,
As described above, since the narrow portion 32d is provided at the central portion in the length direction of the pressing portion 32a, the winding cores 14,
In addition, heat generated in the windings 12 is efficiently radiated through the outer circumferences of the wound cores 14.

Further, in the frame 30 of the second embodiment, as described above, the pair of cut-and-raised portions 3
1a, 31a are provided, and the cut-and-raised portions 31a, 31a are provided.
The length L of the substrate member 31 does not increase, and the material cost can be reduced.

Next, a third embodiment of the present invention shown in FIGS. 4A and 4B will be described. In the third embodiment, the coil bobbin 11, the wound iron cores 14, 14, the windings 12 and the like are the same as those in the first embodiment, and the same elements are denoted by the same reference numerals.

In the first and second embodiments, the board members 19 and 31 are made of one metal plate. The frame 40 of the third embodiment has the end faces 14a and 14a of the wound iron cores 14 and 14, respectively. A pair of substrate members 41, 41 that come into contact with 14a via an insulating material (not shown) are provided. The substrate member 41 is formed by punching a metal plate and forming a bend.
1a and a wall 41 connected to the base 41a at a substantially right angle.
b, and the substrate member 41 has a cross section L
It has the shape of a long and narrow rod.

The substrate member 41 is provided with a pair of through holes 41c, 41c for screwing the screws 42, 42 at the center in the width direction of the wall portion 41b. The board member 41
In the wall portion 41b, shaft insertion holes 41d, 41d are provided near both ends in the width direction. Further, the substrate member 4
Notches 41e, 41e for inserting bolts (not shown) for attaching and fixing the frame 40 to a predetermined location are provided on both sides in the width direction of the one base 41a.

The pair of substrate members 41, 41 are arranged so as to contact the end faces 14a, 14a of the wound iron cores 14, 14, respectively. Further, the substrate members 4 facing each other
The shafts 44, 44 are inserted into the shaft through holes 41d, 41d of the shafts 41, 41, respectively. Male threads 44a are provided at both ends of the shaft 44, and nuts 45 are screwed into male threads 44a protruding from the wall 41b of the substrate member 41. By tightening the nut 45, the board members 41, 41 are urged in the directions adjacent to each other, whereby the winding 1 formed on the coil bobbin 11 is formed.
The four end faces 14a, 14a of the substrate members 41, 41
Are fastened by the wall portions 41b, 41b. The fastening means for urging the board members 41, 41 toward each other is not limited to the shaft 44 and the nut 45.
Any material can be used as long as it can surely hold 4.

The fastening member 46 is provided in the first embodiment and the second embodiment.
In the same manner as in the embodiment, a metal plate material is punched out and bent to form a long pressing portion 46a having a length corresponding to the length of the wound iron cores 14, and both ends of the pressing portion 46a are substantially formed. A pair of connecting portions 46b, 46b bent at right angles
And The connecting portions 46b, 46b have a pair of through holes 41c, 41 provided in the wall portions 41b, 41b.
A pair of long holes 46c, 46c are provided at the same interval as c. Further, a narrow portion 46d having a reduced width is provided at a central portion in the length direction of the pressing portion 46a.

The connecting portions 46b, 46b of the tightening member 46
Is inserted into the window 11d of the coil bobbin 11 and overlaps the outside of the wall 41b of the board members 41, 41. The elongated holes 46c, 46c and the through holes 41c,
Screws 42, 42 are screwed into the base member 41c to
A fastening member 46 is fastened to the first and fourth members 41. Tightening member 46
In FIG. 4B, since the board members 41, 41 and the fastening member 46 are fastened in a state of being pulled downward in FIG. 4B, the holding portion 46a is bent upward, and of the two side portions of the holding portion 46a, Both ends 14a, 14a of the wound cores 14, 14 are in contact with the outer periphery of the wound cores 14, 14, and the substrate members 41, 4
The wound iron cores 14, 14 are held between the holding member 1 and the holding portion 46.

As described above, in the third embodiment, both end faces 14a, 1 of the wound iron cores 14, 14 on which the coil bobbin 11 is formed.
4a is sandwiched between the pair of board members 41, 41, and the wound cores 14, 14 are sandwiched between the board members 41, 41 and the pressing portion 46a of the fastening member 46. 14, and thus this wound iron core 1
The coil bobbin 11 formed with 4, 14 can be securely and firmly fixed and held.

In the frame 40 of the third embodiment, since the wound iron cores 14 are sandwiched between the tightening member 46 and the substrate members 41, 41 as described above, the wound iron cores 14, 14 are attached to the core winding portion 11a. , 11a. Therefore, if the transformer is fixed to the frame 40, the core 1
Adhesion between the coil bobbin 11 and the coil bobbin 11 is maintained, so that damage to the coil bobbin 11 due to vibration or the like can be prevented, and deterioration of the insulation characteristics of the transformer can be prevented.

Further, in the frame 40 of the third embodiment,
The end faces 14a, 14a of the wound iron cores 14,
1, 41, the winding core 14,
The substrate members 41, 41 are not arranged on the outer periphery of the base member 14, and the holding portion 46a of the fastening member 46 has a narrow portion 46a.
Since d is provided, the heat generated by the wound cores 14, 14 and the windings 12 during energization is efficiently dissipated through the outer circumferences of the wound cores 14, 14.

Further, in the frame 40 according to the third embodiment, the pair of substrate members 41, 41 are fastened by the shaft 44 and the nut 45 so that both end surfaces 14 of the wound cores 14, 14 are formed.
a, 14a, so that the core 1
Even when the length L is long, the length of the shaft 44 is increased and the pressing portion 46a of the tightening member 46 is increased.
Is increased, the wound core can be fixed without changing the dimensions of the board members 41, 41.
When the wound core is large, the material cost can be reduced.

[0045]

In the transformer frame according to the first aspect of the present invention, the pair of connecting portions of the fastening member are fastened to the cut-and-raised portions of the substrate member, and both sides of the holding portion abut against the outer periphery of the pair of wound cores. Then, since the winding core is sandwiched between the holding portion and the substrate member, the winding core formed on the coil bobbin is securely fixed. Further, since the frame of the first aspect is composed of the two members, the board member and the fastening member, as described above, the structure is simple and the material for forming the frame can be saved.

In the transformer frame of the present invention, the pair of substrate members abutting on the end face of the wound core are urged by the fastening means in such a manner as to approach each other, and the pair of connecting portions of the fastening member are respectively connected to the substrate. Since the core is fastened to the member and the core is held between the holding part of the fastening member and the substrate member, the core formed on the coil bobbin is securely fixed. Further, since the frame according to the second aspect includes the pair of substrate members, the fastening member, and the fastening means as described above, the structure is simple and the material for forming the frame can be saved. In particular, in the second aspect, since the pair of substrate members are arranged on the end face of the wound core and fastened by the fastening means as described above, it is necessary to increase the size of the board member even when the length of the wound core is long. And saves on the materials needed to form the frame.

In the transformer frame according to the third aspect, since the narrow portion is provided in at least a part of the length of the pressing portion in the length direction, the heat generated by the winding and the winding core when energized is reduced by the narrow portion and the winding core. Since heat is also radiated from the gap formed between the transformers, the heat radiating property when the transformer is used is good.

According to the transformer frame of the present invention, the winding core is pressed toward the substrate member in a direction at an angle of about 45 ° with the direction in which the pair of winding cores are separated from each other. The core is firmly fixed, and the wound core and the coil bobbin are maintained in close contact.

[Brief description of the drawings]

FIG. 1A is a plan view showing a first embodiment of the present invention,
(B) is a front view of (A).

FIG. 2 is a schematic cross-sectional view taken along the line II-II of FIG. 1B for explaining a curved state of a pressing portion of a fastening member.

FIG. 3A is a plan view showing a second embodiment of the present invention,
(B) is a front view of (A).

FIG. 4A is a plan view showing a third embodiment of the present invention,
(B) is a front view of (A).

FIG. 5 is a perspective view showing a transformer including a coil bobbin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Coil bobbin 12 Winding 14 Winding core 19, 31, 41 Board member 19b, 31a Cut-and-raised part 20, 32, 42 Tightening member 20a, 32a, 46a Pressing part 20b, 32b, 46b Connecting part 20d, 32d, 46d Narrow width Part 44 shaft 45 nut

Claims (4)

(57) [Claims] 1. A rectangular frame-shaped coil bobbin comprising a pair of core winding portions and a connecting portion for connecting the core winding portions at an interval, wherein a winding is formed on the outer periphery of the coil bobbin. A frame for a transformer in which a winding core is formed on each of the core winding portions, and a coil bobbin on which the winding and the winding core are formed is mounted, and a pair of cut-and-raised portions are provided to contact both ends of the winding core. Substrate member, a long pressing portion, and a tightening member having a pair of connecting portions formed by bending both ends of the pressing portion, wherein the pair of connecting portions of the tightening member are cut and raised, respectively. A frame for a transformer, characterized in that both sides of the holding portion are brought into contact with the outer periphery of a pair of winding cores, and the winding core is sandwiched between the holding portion and the substrate member. 2. A rectangular frame-shaped coil bobbin comprising a pair of core winding portions and a connecting portion for connecting the core winding portions at intervals, wherein a winding is formed on the outer periphery of the coil bobbin. What is claimed is: 1. A transformer frame having a core wound on a core winding part, comprising: a pair of substrate members each in contact with an end face of the core; and a clamp for urging the substrate members in directions approaching each other. Attaching means, a long pressing portion, and a tightening member having a pair of connecting portions formed by bending both ends of the pressing portion, wherein the pair of connecting portions are respectively fastened to a substrate member, and the pressing portion is provided. Abut both sides of the wound iron core,
A frame for a transformer, wherein a winding core is sandwiched between a holding portion and a substrate member. 3. The transformer frame according to claim 1, wherein a narrow portion is provided in at least a part of a length direction of the pressing portion. 4. The holding portion includes a pair of wound cores,
4. The transformer frame according to claim 1, wherein the frame is pressed toward the substrate member in a direction at an angle of about 45 ° with the direction away from each other. 5.