JP4797337B2 - Bobbins, inductances, transformers, and pulse generators - Google Patents

Description

  The present invention relates to a bobbin, an inductance, a transformer, and a pulse generator.

  24 (a) and 24 (b), a high-voltage transformer is configured by using a conventional divided bobbin B ', and the bobbin B' winds around the cylindrical winding part 101 and the winding part 101. Three winding regions 101a, 101a,. . . Are divided into three flanges 102, 102,. . . And one collar portion 103. The flange portions 102 and 103 are formed in a disc shape and are erected on the outer peripheral surface of the winding portion 101, and the flange portions 102 and 103 appropriately divide the winding portion 101 in order to divide the high voltage region ( This is provided for 3 divisions in FIG. The three flange portions 102 are arranged in parallel in the winding axis direction from one end of the winding portion 101 with the winding region 101 a interposed therebetween, and a flange portion 103 is provided at the other end of the winding portion 101. The winding portion 101 has a through hole 101b in the winding axis direction. The flange portion 102 is provided with a notch 102a from the outer peripheral edge toward the bobbin winding center, and winding regions 101a adjacent to each other across the flange portion 102 are continuous via the notch 102a.

  The secondary winding 120 is wound around the winding region 101a, and the primary winding 110 is wound outside the secondary winding 120 of the winding region 101a on the lowest voltage side. Here, round wires are used for the primary winding 110 and the secondary winding 120, the primary winding 110 is wound in 3 to 6 turns, and the secondary winding 120 is wound in 100 to 400 turns, When a current flows through the primary winding 110, a high voltage is generated in the secondary winding 120, and the bobbin B ′ around which the primary winding 110 and the secondary winding 120 are wound is sealed with a resin such as epoxy. It constitutes a high voltage transformer. (For example, refer to Patent Document 1).

Further, as shown in FIG. 25, a high-voltage transformer in which a primary winding 210 and a secondary winding 220 are formed by directly edgewise winding a rectangular winding on a rod-shaped magnetic core 230 formed in a substantially cylindrical shape. There is also. In this case, since the rectangular winding is edgewise wound, the line area ratio is improved as compared with the case where the round wire is divided and aligned as shown in FIG. Becomes smaller. Further, since the rectangular winding is wound in a single line from the low voltage side to the high voltage side with a constant width (ie, shifted by the thickness of the rectangular coil), at most one turn between adjacent windings. Unlike the case where the round winding of the bobbins is applied to the bobbin B ′ in FIG. 24, the portions in which the potentials in the windings are greatly different do not approach each other. Therefore, unlike the bobbin B ′, the split collars 102 and 103 are not necessary, and the line product ratio is further improved. (For example, refer to Patent Document 2).
JP 2001-257087 A (paragraph numbers [0010] to [0021], FIGS. 1 to 4) JP 2002-93635 A (paragraph numbers [0031], [0032], FIG. 12)

  In the high-voltage transformer shown in FIG. 24, when the rectangular winding 20 is transferred to the adjacent winding region 1a, the outer periphery of the flange portion 102 smoothly passes through the notch portion 102a provided in the bobbin winding center direction. There was a problem that it could not be migrated.

  Further, when the secondary winding 120 is wound at random, an insulation failure occurs when a turn having a large potential difference comes close. In the high-voltage transformer shown in FIG. 120 are aligned and wound. However, even when aligned winding is performed, if the winding is wound in a stepped state, it causes an insulation failure as in the case of random winding.

  And as shown in FIG. 26, when the secondary winding 120 which consists of a round wire is wound by turns for every stage, dead space is large and a line area ratio is not good (small). Therefore, since the line product ratio is small, there is a problem that the direct current resistance value becomes large at the number of turns that realizes a predetermined step-up ratio.

  Further, when the rectangular winding is single edgewise wound as in the high voltage transformer shown in FIG. 25, the transformer needs to be long in order to obtain a predetermined step-up ratio. Furthermore, in the case of edgewise winding in which the flat winding is wound so that the wide surfaces face each other, the outer side of the flat winding is wound while being stretched, so that the insulating film on the outer side of the flat winding is also stretched. Therefore, there arises a problem that the insulating film becomes thin, the insulating film cracks and the insulating performance is lowered, or the winding radius cannot be reduced more than a certain value and the size cannot be reduced.

  The present invention has been made in view of the above-mentioned reasons, and its purpose is to smoothly shift the winding when transferring to the adjacent winding region, and the line area ratio of the winding is good, An object of the present invention is to provide a bobbin, an inductance, a transformer, and a pulse generator capable of reducing the size and reducing the resistance of a winding.

The invention according to claim 1 is a winding part for winding a rectangular winding, and a plurality of windings in the winding axis direction, wherein the winding part is erected on the outer peripheral surface of the winding part along the winding direction. A bobbin comprising a collar part divided into winding areas and a notch part formed in the collar part so that adjacent winding areas are continuous, wherein the notch part is a tangential direction of the outer periphery of the winding part The rectangular winding inserted into the notch portion for transition to the adjacent winding region during winding is led out in the tangential direction of the outer periphery of the winding portion, and the width of the winding region is The winding is formed in a width substantially the same as the wide surface of the winding, and in each winding region, the rectangular winding is wound in a row so that the wide surfaces face each other, and the winding portion is in the winding axis direction. The cross-sectional shape seen from the shape is a shape in which a flat portion is provided on a part of a circular outer periphery, and the notch is formed from the outer periphery of the flange. Surface in contact, flat Kakumaki line derived via the notch is characterized by contacting the flat portion.

According to the present invention, since the rectangular winding is led out in the tangential direction of the outer periphery of the winding part at the time of transition of the winding region, the rectangular winding can be smoothly transferred to the adjacent winding region. In addition, by winding a rectangular winding on each winding region, the line area ratio of the winding can be improved and the DC resistance value can be reduced as compared with the conventional round winding. Therefore, it is possible to reduce the size. Furthermore, since there are no step-downs or winding disturbances that occur in the aligned winding of round wires, the winding process can be easily performed, and highly reliable insulation performance can be ensured. Moreover, the winding part can be easily fixed to the winding machine, and the cross-sectional area of the magnetic material disposed in the winding part can be increased while facilitating the winding operation.

  According to a second aspect of the present invention, in the first aspect, the notch portion has an opening formed on an outer peripheral edge of the flange portion, and the shape in the vicinity of the opening portion when the notch portion is viewed from the winding axis direction is a curve. It is characterized by being configured.

  According to the present invention, when the rectangular winding is moved to the adjacent winding region, a sharp refracting portion does not occur in the rectangular winding, so that a large stress is not applied to the insulating coating of the rectangular winding.

  According to a third aspect of the present invention, in the first aspect, the notch portion has an opening formed on an outer peripheral edge of the flange portion, and the shape in the vicinity of the opening portion when the notch portion is viewed from the winding axis direction is tapered. It is comprised by this.

According to the present invention, the same effect as that of claim 2 is obtained .

According to a fourth aspect of the present invention, in any one of the first to third aspects, at least one of the mutually facing inner wall surfaces of the notch is formed obliquely with respect to the thickness direction of the flange. .

According to the present invention, the rectangular winding can be shifted to the adjacent winding region without difficulty .

A fifth aspect of the present invention is characterized in that a concave portion is provided in the winding axis direction in the winding portion of the bobbin according to any one of the first to fourth aspects, and a magnetic body is disposed in the concave portion.

According to the present invention, it is possible to provide an inductance having the same effect as any one of the first to fourth aspects, and the magnetic body inserted into the concave portion 1 is fixed at a predetermined position by contacting the bottom surface of the concave portion. Will improve.

The invention of claim 6 is characterized in that, in claim 5, an insertion hole is provided in the bottom surface of the recess.

  According to this invention, when the periphery is filled with the resin, the entire air layer (void) in the recess can be discharged to the outside of the recess through the through hole.

According to a seventh aspect of the present invention, the magnetic body provided in the inductance according to the fifth or sixth aspect is made longer than the winding portion in at least one direction of the winding axis direction, and a lead wire is wound outside the rectangular winding. It is characterized by that.

According to the present invention, it is possible to provide a transformer having the same effect as any one of claims 1 to 6 and to improve the degree of coupling between the primary winding and the secondary winding.

The invention of claim 8 is characterized in that, in claim 7, the lead wire is wound while being biased in a direction in which the magnetic body is lengthened from the center of the winding portion.

  According to the present invention, the primary winding that is a low-voltage wire can be moved away from the high-voltage side of the secondary winding without lowering the degree of coupling between the primary winding and the secondary winding. The high-voltage electric field applied to can be reduced.

The invention according to claim 9 is a transformer using the bobbin according to any one of claims 1 to 4, or the transformer using the inductance according to claim 5 or 6, or the transformer according to claim 7 or 8 , and the transformer. A circuit unit for generating a pulse voltage, and a case having a cylindrical socket port to which a cylindrical cap of a discharge lamp is mounted, wherein the magnetic body of the transformer is located substantially on the center line of the socket port, The circuit unit is arranged around the transformer.

According to the present invention, it is possible to provide a pulse generator capable of producing the same effect as any one of the first to eighth aspects.

As described above, according to the present invention, the winding can be smoothly transferred to the adjacent winding region, the winding line area ratio is good, the size is reduced, and the resistance of the winding is reduced. There is an effect that it is possible to provide a bobbin, an inductance, a transformer, and a pulse generator capable of performing the above. Moreover, the winding part can be easily fixed to the winding machine, and the cross-sectional area of the magnetic material disposed in the winding part can be increased while facilitating the winding operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIGS. 1A, 1B, and 2 show a split bobbin B according to the present embodiment. The bobbin B includes a cylindrical winding part 1 and four winding parts 1 in the winding axis direction. Winding regions 1a, 1a,. . . Are divided into four ridges 2, 2,. . . And one collar 3. The flange portions 2 and 3 are formed in a disc shape and are erected on the outer peripheral surface of the winding portion 1, and the four flange portions 2 are wound from one end of the winding portion 1 with the winding region 1 a interposed therebetween. A collar portion 3 is provided at the other end of the winding portion 1. The winding portion 1 has a through hole 1b having a circular cross section in the winding axis direction.

  The collar part 2 is provided with a notch part 2a on the plate surface for continuing the winding regions 1a adjacent to each other with the collar part 2 interposed therebetween. The notch portion 2 a is formed in a straight line from the opening 2 b provided on the outer peripheral edge of the flange portion 2 in the tangential direction of the outer peripheral surface of the winding portion 1 until it contacts the outer peripheral surface of the winding portion 1.

  In the inductance using the bobbin B, as shown in FIG. 3, the winding wound around the winding portion 1 is a rectangular winding 20, and each winding region 1 a has a width substantially the same as that of the rectangular winding 20. In each winding region 1a, the rectangular windings 20 are wound in one row. Then, after winding up to a predetermined number of turns in the winding region 1a on one end side, the rectangular winding 20 is inserted into the notch portion 2a and moved to the winding region 1a adjacent to the other end side. The rectangular winding 20 is similarly wound in the wound region 1a. Since the rectangular winding 20 is led out in the tangential direction of the outer peripheral surface of the winding portion 1 during the transition of the winding region, the rectangular winding 20 can be smoothly transitioned to the adjacent winding region 1a.

  In addition, by winding the rectangular winding 20 in a row in each winding region 1a, the line area ratio of the winding can be improved and the DC resistance can be improved as compared with the conventional round winding. The value can be reduced, and the size can be reduced. Furthermore, since there are no step-downs or winding disturbances that occur in the aligned winding of round wires, the winding process can be easily performed, and highly reliable insulation performance can be ensured.

  Further, since the rectangular winding 20 is wound in a row so that the wide surfaces face each other, the radius of curvature does not become too small, and therefore the insulating film of the rectangular winding 20 does not extend, and the original insulation It can be wound without impairing performance.

(Embodiment 2)
FIGS. 4A, 4B, and 5 show the bobbin B of the present embodiment. The basic configuration is the same as that of the first embodiment, but the shape of the notch 2a is different from that of the first embodiment. In the first embodiment, the cutout portion 2a viewed from the winding axis direction of the winding portion 1 has a linear shape, but the cutout portion 2a of the present embodiment has a curved shape as viewed from the winding axis direction of the winding portion 1. It has a shape, is formed in a curved line in the tangential direction of the outer peripheral surface of the winding part 1 from the opening 2b provided in the outer peripheral edge of the collar part 2, and is curved in the winding direction. Therefore, when the rectangular winding 20 is moved to the adjacent winding region 1a, no sharp refracting portion is generated in the rectangular winding 20, so that no great stress is applied to the insulation coating of the rectangular winding 20.

  4 (a), (b), and FIG. 5, the entire cutout portion 2a is formed in a curved shape. However, the shape of the cutout portion 2a viewed from the winding axis direction is shown in FIG. Only the vicinity of the opening 2b of the portion 2 may be formed in the curved portion 2c curved in the winding direction, and further, only the vicinity of the opening 2b of the collar portion 2 is inclined in the winding direction as shown in FIG. You may form in the taper part 2d which provided the surface.

(Embodiment 3)
FIGS. 8A, 8B, and 9 show the bobbin B of the present embodiment, and the basic configuration is the same as that of FIG. 7 of the second embodiment, but the shape of the notch 2a is that of FIG. And different. The notch 2a of the present embodiment is provided with a tapered portion 2e having an inclined surface in the thickness direction (winding axis direction) of the flange portion 2 on the inner peripheral side in the vicinity of the opening 2b. The inclined surface is provided on one end side in the thickness direction so that the width of the cutout portion 2a becomes narrower from the one end surface of the flange portion 2 toward the other end side. Therefore, when the flat winding 20 is moved to the adjacent winding region 1a, a sharp refracting portion does not occur in the flat winding 20 as compared with the second embodiment, so that deformation of the flat winding 20 can be further suppressed. There is little deterioration of insulation.

(Embodiment 4)
10A, 10B, and 11 show the bobbin B of the present embodiment, and the basic configuration is the same as that of the first embodiment, but the shape of the winding portion 1 is different. The winding part 1 is formed in a square tube shape, and a through hole 1b having a square cross section is formed in the winding axis direction. The notch 2 a is provided in a straight line so as to contact one corner of the outer peripheral surface of the winding part 1 from the outer peripheral edge of the flange part 2, and is wound from the opening 2 b provided on the outer peripheral edge of the flange part 2. It is formed in one corner tangential direction of the portion 1. By forming the winding part 1 in the shape of a square cylinder, the through-hole 1b is fixed to the rotating shaft only by inserting the through-hole 1b into the rotating shaft of the winding machine (not shown), and the rotating shaft is rotated. The winding work becomes easier.

(Embodiment 5)
12A, 12B, and 13 show the bobbin B of the present embodiment. The basic configuration is the same as that of the first embodiment, but the shape of the notch 2a is different from that of the first embodiment. The notch portion 2a of the present embodiment is provided with a tapered portion 2f provided with an inclined surface in the thickness direction (winding axis direction) of the flange portion 2 on the inner peripheral side, and the inclined surface of the tapered portion 2f is The cutout portion 2a is provided so that the width of the cutout portion 2a increases from one end surface of the portion 2 toward the other end surface. By this taper portion 2f, the rectangular winding 20 can be easily guided to the adjacent winding region 1a. Further, as shown in FIG. 14, the inclined portion length t2 of the tapered portion 2f has a relationship of t2 ≧ d with respect to the width d of the flat winding 20, so that the thickness t1 of the flange 2 is t1 <D, which enables the heel 2 to be thinned.

  Furthermore, the winding part 1 has a recess 1c formed in the winding axis direction, and a magnetic body (not shown) inserted into the recess 1c is fixed at a predetermined position by contacting the bottom surface 1d of the recess 1c. Assemblability is improved.

(Embodiment 6)
FIGS. 15A, 15B, and 16 show the bobbin B of the present embodiment. The basic configuration is the same as that of the first embodiment, but the shape of the winding portion 1 is different. The cross-sectional shape viewed from the winding axis of the winding part 1 is a shape in which a flat part 1e is provided on a part of a circular outer periphery, and the notch part 2a is in contact with the flat part 1e from the outer peripheral edge of the flange part 2. It is provided in a straight line.

  A recess 1c having the same shape as the winding part 1 in the axial direction is formed in the winding axis direction of the winding part 1, and the recess 1c can be rotated by simply inserting it into the rotating shaft of a winding machine (not shown). The recess 1c is fixed to the shaft, and the winding area of the ferrite core 30 constituting the magnetic body inserted into the recess 1c can be increased while facilitating the winding operation by rotating the rotating shaft. Further, the ferrite core 30 is fixed at a predetermined position by contacting the bottom surface 1d of the recess 1c, and the assemblability is improved.

  Furthermore, by setting the thickness t3 of the bottom surface 1d to t3 <t1 with respect to the thickness t1 of the flange 2, the ferrite core 30 is extended further to one end side (lower side in FIG. 16) than the winding region 1a. Can do. Therefore, as shown in FIG. 16, when a transformer structure is formed by winding an insulation-coated winding as a primary winding (lead wire) 20 on the outside of a rectangular winding 20, a rectangular winding (secondary winding) is formed. The degree of coupling between the line 20 and the primary winding 10 can be improved.

  The notch portion 2a is formed by providing tapered portions 2f and 2g having inclined surfaces in the thickness direction (winding axis direction) of the flange portion 2 on the inner peripheral side and the outer peripheral side, respectively, and the tapered portions 2f and 2g. Both of the inclined surfaces are inclined toward the inner peripheral side, but the cutout portion 2a may have any shape as long as the rectangular winding 20 can be transferred to the adjacent winding region 1a.

  Further, since the rectangular winding 20 is led out obliquely to the outer peripheral surface of the adjacent winding region 1a, the outermost outer periphery of the flat winding 20 after winding has a transition portion by the notch portion 2a at other locations. Although it tends to bulge more outwardly, the end of the inner peripheral surface of the notch 2a coincides with the outer periphery of the winding part 1, so that the rectangular winding 20 passes through the notch 2a. Thus, the portion led out to the adjacent winding region 1a substantially coincides with the outer peripheral surface of the winding portion 1, and the bulge of the outermost periphery when 20 turns of the rectangular winding is completed can be reduced.

(Embodiment 7)
FIGS. 17A, 17B, and 18 show the bobbin B of the present embodiment. The basic configuration is the same as that of the first embodiment, but the shape of the winding portion 1 is different. The winding part 1 is formed in a rectangular tube shape, and the notch part 2 a is provided in a straight line so as to contact one side of the four sides of the outer peripheral surface of the winding part 1 from the outer peripheral edge of the flange part 2. Since it is formed in the tangential direction of one side of the winding part 1 from the opening 2b provided on the outer peripheral edge, the rectangular winding 20 can be smoothly transferred to the adjacent winding region 1a. Moreover, since the winding part 1 is formed in a square cylinder shape, the silicon steel plate 31 constituting the magnetic body inserted into the recess 1c formed in the winding axis direction comes into contact with the bottom surface 1d of the recess 1c. As a result, the assembly is improved in place. Furthermore, the shape of the notch 2a is the same as that of the sixth embodiment, and the same effect as that of the sixth embodiment is obtained.

  In addition, a through hole 1f (smaller than the cross section of the recess 1c) is provided at the substantially center of the bottom surface 1d of the recess 1c, and when the bobbin B is used to form a high-voltage transformer and the periphery is filled with resin, partial discharge or the like is performed. All the air layers (voids) in the recess 1c that cause the discharge are discharged to the outside of the recess 1c through the through holes 1f.

(Embodiment 8)
The bobbin B of this embodiment is shown in FIGS. 15A and 15B similarly to the sixth embodiment, and in this embodiment, the high-voltage transformer shown in FIG. 19 is configured using this bobbin B. Here, in the rectangular winding 20, one end side (the lower side in FIG. 19) of the winding part 1 is the high voltage side, and the other end side (the upper side in FIG. 19) of the winding part 1 is the low voltage side. The end surface of the winding portion 1 substantially coincides with the opening surface of the concave portion 1c, and is longer in the low-pressure direction than the winding region 1a by the thickness of the flange portion 3. Accordingly, the primary winding 10 is biased in the low-voltage side direction and wound so that it is a low-voltage line without lowering the degree of coupling between the primary winding 10 and the rectangular winding (secondary winding) 20. The primary winding 10 can be moved away from the high-voltage side of the rectangular winding 20, and the high-voltage electric field applied to the insulating coating of the primary winding 10 can be reduced.

  As shown in FIG. 20, if a disc-shaped yoke core 30a is provided on the other end surface of the ferrite core 30 and disposed on the flange 3, the primary winding 10 and the rectangular winding (secondary winding) The degree of bonding with 20 can be further improved. Further, the lead frame 11 may be integrally formed as a primary winding with the periphery sealed with a resin 12.

  It is assumed that the periphery of the high voltage transformer of this embodiment is filled with resin.

(Embodiment 9)
21 and 22 show an example in which the high voltage transformer using the bobbin B of the sixth embodiment is applied to a socket with a built-in start circuit of an in-vehicle HID lamp. FIG. 23 shows a configuration of a general lighting circuit of the HID lamp. The socket 40 is formed with a cylindrical inner tube portion 42 that fits into an annular groove provided on the bottom surface of the base inside the cylindrical outer tube portion 41 that fits with the outer peripheral surface of the base of the HID lamp La. The two cylindrical portions 41 and 42 are concentrically protruding from the box-shaped case portion 43. In the outer cylinder portion 41, a pair of outer electrodes 44 that are electrically connected to outer peripheral electrodes provided on the peripheral surface of the base of the HID lamp La are disposed. In addition, a center electrode 45 having a resilient spring piece projecting in a direction in which the tips approach each other is electrically connected to the high voltage side end of the rectangular winding 20 at the bottom of the inner cylindrical portion 42.

  In the case part 43, a high-voltage transformer using the bobbin B and a low-voltage circuit part 50 are accommodated, and a rectangular winding (secondary winding) 20 is provided in each winding region 1a of the winding part 1 of the bobbin B. The primary winding 10 is wound on the outside of the winding part 1 to form a pulse generator.

  The socket 40 receives the output of the DC / DC converter 70 that converts the DC voltage output from the battery E into a predetermined voltage via the harness 60, and the low-voltage circuit unit 50 is arranged in the case part 43 in the direction in which the harness 60 is pulled out. Is done. Further, the ferrite core 30 inserted into the concave portion 1 c of the bobbin B is located on a substantially center line of the outer cylinder portion 41 and the inner cylinder portion 42.

  The low-voltage circuit unit 50 includes a capacitor C1 connected between the -400V-600V output terminals of the DC / DC converter 70, a capacitor C2 connected between the -400V-0V output terminals of the DC / DC converter 70, and a primary winding. 10 and a discharge gap G1 connected in parallel to the capacitor C1. When the voltage across the capacitor C1 exceeds the predetermined voltage, the discharge gap G1 is conducted, the discharge current from the capacitor C1 flows through the primary winding 10, and a pulse voltage is generated across the rectangular winding 20, thereby generating a HID. The lamp La is started by applying a pulse voltage through the outer electrode 44 and the center electrode 45.

  In the present embodiment, the primary winding 10 is composed of a flat wire covered with a high insulation coating, and a self-bonding tape 25 is wound around the outer periphery of the high insulation coating, and a current is supplied to the primary winding 10. The adjacent self-bonding tapes 25 are fused with each other by heat generated by flowing, and the primary winding 10 is fixed in position.

The external appearance of the bobbin of Embodiment 1 of this invention is shown, (a) is an end view, (b) is a side view. It is A1-A1 'sectional drawing same as the above. It is A1-A1 'sectional drawing which wound the rectangular winding same as the above. The external appearance of the bobbin of Embodiment 2 of this invention is shown, (a) is an end view, (b) is a side view. It is A2-A2 'sectional drawing same as the above. It is an end elevation which shows another structure same as the above. It is an end elevation which shows another structure same as the above. The external appearance of the bobbin of Embodiment 3 of this invention is shown, (a) is an end view, (b) is a side view. It is A3-A3 'sectional drawing same as the above. The external appearance of the bobbin of Embodiment 4 of this invention is shown, (a) is an end elevation, (b) is a side view. It is A4-A4 'sectional drawing same as the above. The external appearance of the bobbin of Embodiment 5 of this invention is shown, (a) is an end elevation, (b) is a side view. It is A5-A5 'sectional drawing which wound the rectangular winding same as the above. FIG. 14 is a partially enlarged view of FIG. 13. The external appearance of the bobbin of Embodiment 6 of this invention is shown, (a) is an end view, (b) is a side view. It is A6-A6 'sectional drawing of the trans | transformer using a bobbin same as the above. The external appearance of the bobbin of Embodiment 7 of this invention is shown, (a) is an end view, (b) is a side view. It is A7-A7 'sectional drawing same as the above. It is side surface sectional drawing of the trans | transformer of Embodiment 8 of this invention. It is side surface sectional drawing which shows another structure same as the above. It is a front view of the socket with a built-in start circuit which incorporated the pulse generator of Embodiment 9 of this invention. It is side surface sectional drawing same as the above. It is a block diagram of the general lighting circuit of a HID lamp. The external appearance of the transformer of the first conventional example is shown, (a) is an end view, and (b) is an A10-A10 'sectional view. It is a perspective view which shows the external appearance of the transformer of the 2nd prior art example. FIG. 25 is a partially enlarged view of FIG.

B Bobbin 1 Winding part 1a Winding area 2,3 Hook part 2a Notch part 2b Opening part

Claims (9)

A winding part for winding a rectangular winding, and a flange part that stands on the outer peripheral surface of the winding part along the winding direction and divides the winding part into a plurality of winding regions in the winding axis direction. And a bobbin provided with a notch portion formed in the collar portion so as to continue the winding regions adjacent to each other,
The notch portion is formed in a tangential direction of the outer periphery of the winding portion, and a rectangular winding inserted in the notch portion for shifting to an adjacent winding region at the time of winding is an outer periphery of the winding portion. Derived in the tangential direction, the width of the winding region is formed to be substantially the same width as the wide surface of the flat winding, and in each winding region, the flat windings are stacked in a row so that the wide surfaces face each other. Wound ,
The winding portion has a cross-sectional shape as viewed from the winding axis direction, in which a flat portion is provided on a part of a circular outer periphery, and the notch is in contact with the flat portion from an outer peripheral edge of the flange portion. The bobbin is characterized in that the rectangular winding led out through the notch is in contact with the flat part .   The said notch part forms an opening part in the outer periphery of the said collar part, The shape of the said opening part vicinity seeing the said notch part from the winding-axis direction is comprised by the curve. Bobbins.   2. The cutout portion is formed with an opening in an outer peripheral edge of the flange portion, and the shape in the vicinity of the opening when the cutout portion is viewed from the winding axis direction is formed in a tapered shape. The bobbin described. The bobbin according to any one of claims 1 to 3, wherein at least one of the mutually facing inner wall surfaces of the notch is formed obliquely with respect to the thickness direction of the flange. An inductance, wherein a recess is provided in a winding axis direction in the winding portion of the bobbin according to any one of claims 1 to 4, and a magnetic body is disposed in the recess. The inductance according to claim 5, wherein an insertion hole is provided in a bottom surface of the recess. 7. A transformer comprising a magnetic body provided in the inductance according to claim 5 or 6 that is longer than the winding portion in at least one direction of a winding axis direction, and a lead wire is wound outside the rectangular winding. The transformer according to claim 7, wherein the lead wire is wound while being biased in a direction in which the magnetic body is elongated from a center of the winding portion. A transformer using the bobbin according to any one of claims 1 to 4, a transformer using the inductance according to claim 5 or 6, or a transformer according to claim 7 or 8, and a circuit unit for generating a pulse voltage using the transformer And a case having a cylindrical socket port to which a cylindrical cap of a discharge lamp is mounted, the magnetic body of the transformer is located on a substantially center line of the socket port, and the circuit unit is a periphery of the transformer It is arrange | positioned in the pulse generator characterized by the above-mentioned.

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