JP4301464B2 - Bobbin for clamp-type ammeter and core sensor structure using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a clamp type in which one end portion (for example, a start end portion) drawn from a winding and the other end portion (for example, a end portion) can be reliably prevented from contacting each other and short-circuiting. The present invention relates to a bobbin for an ammeter and a core sensor structure using the same.
[0002]
[Prior art]
FIG. 4 shows, as an example, a pair of core sensors provided in a conventional clamp-type ammeter, which is located on the left side. (B) shows a state in which the lead wire is drawn out by concealing the connection part between the start end of the winding and the end lead and the corresponding lead wire with insulating tape. Each is shown.
[0003]
According to the figure, a bobbin 4 is interposed between the magnetic cores 3 which are laminated in a substantially arc shape by laminating magnetic steel plates, and the bobbin 4 has a base end 5a and a terminal end 5b at the base end. The sensor portion 2 is formed by applying the winding 5 so as to be pulled out from the side.
[0004]
Moreover, since the start end portion 5a and the end end portion 5b of the winding 5 drawn out from the bobbin 4 are each small in diameter, as shown in FIG. 7 is connected separately to each other and then slightly folded along the back side of the insulating tape 6 covered by the winding 5 positioned on the base end side, so that the insulating tape is located at the position where the respective connecting portions 7a and 8a are located. By further attaching 9, only the lead wires 7 and 8 are pulled out to the outside as shown in FIG. 4 (b), and then housed in a shield case (not shown) in an insulated state, thereby forming the core sensor 1. ing.
[0005]
[Problems to be solved by the invention]
However, according to the above-described conventional example, the lead wires 7 and 8 can be pulled out while concealing the connection portions 7a and 8a by the insulating tape 9 to prevent disconnection, but each connection portion 7a and 8a is wound on the winding 5. In order to avoid direct contact with the insulation tape 6, the insulation tape 6 must be wound on the winding 5 in advance, and then the insulation tape 6 and 9 must be wound in two layers, such as the insulation tape 8 being wound. was there.
[0006]
Further, when the insulating tape 9 is wound, the connecting portions 7a and 8a of the lead wires 7 and 8 are arranged in a separated state so as not to contact and short-circuit. There was also a problem that required consideration and skill.
[0007]
In view of the above problems found in the prior art, the present invention reliably prevents a short circuit between one end (for example, the start end) of the winding and the other end (for example, the end), and It is an object of the present invention to provide a bobbin for a clamp-type ammeter that can contribute to improvement and simplification of performance and a core sensor structure using the bobbin.
[0008]
[Means for Solving the Problems]
The present invention has been made to achieve the above object, and the bobbin according to the present invention is characterized in that the bobbin according to the present invention is wound by covering each of the magnetic cores arranged in pairs and facing each other. The one-side bobbin portion and the other-side bobbin portion that are split in two so as to be freely fitted and have a protruding edge portion that can form a flange portion at the base end side and the tip end side at the time of the fitting. In the clamp type ammeter bobbin, one guide bobbin part or the other bobbin part is provided on the base end side with two guide tongue pieces lying in the outer peripheral direction. When these guide tongues are provided on the back side of the bobbin, the guide tongues located on the inside are provided with at least two through holes spaced apart from each other. Each tongue has at least one through hole. There isolation insertion between one end and the other end being drawn from the winding to the freely.
[0009]
In addition, the structural features of the core sensor structure according to the present invention are divided into two in order to cover each of the magnetic cores and the magnetic cores that are opposed to each other in pairs, It is applied to the bobbin composed of one side bobbin part and the other side bobbin part provided with protruding edges capable of forming flange parts on the base end side and the tip end side, and the peripheral surface located between the flange parts of the bobbin. In the core sensor of the clamp-type ammeter comprising at least an external lead that is individually connected to one end and the other end drawn from the wound winding and drawn separately from the base end side, The projecting edge provided on the base end side of either the one side bobbin part or the other side bobbin part is provided with two guide tongue pieces projecting in the outer peripheral direction so as to be able to fall down. Of the tongue, lying on the back side of the bobbin The guide tongue located on the inner side is provided with at least two through holes spaced apart from each other, and the guide tongue located on the outer side is provided with at least one through hole. The part is inserted through one through hole of the guide tongue piece located on the inside and led out to the outside, and the other end of the winding is on the outside with the other through hole of the guide tongue piece located on the inside. One guide hole in the positioned guide tongue is inserted into the outside lead and connected to the external lead separately, and the external lead is in a state where these guide tongues are laid down on the back side of the bobbin. This is because the external leads are drawn out to the outside by covering them with the insulating tape material.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an explanatory view showing an example of a bobbin according to the present invention on the left half side, in which (A) is a rear view before assembly, (B) is a rear view after assembly, and (D) Shows right side views after assembly.
[0011]
According to the figure, the entire bobbin 11 is made of an insulating synthetic resin material such as polypropylene or polyethylene that is divided into two parts and can be freely fitted as shown in FIG. The one-side bobbin portion 15 and the other-side bobbin portion 18 having an appropriate shape are configured.
[0012]
Further, when the one-side bobbin portion 15 and the other-side bobbin portion 18 are fitted together so as to face each other and assembled as shown in FIG. As shown in FIG. 1 (c), there are projecting edges 16, 17 and projecting edges 19, 20 capable of forming flanges 12, 13, respectively. Is formed.
[0013]
In addition, according to the illustrated example, the protruding edge portion 19 located on the proximal end side of the other side bobbin portion 18 has two pieces of appropriate lengths. Guide tongues 21 and 22 are provided so as to be able to fall down toward the outer circumferential direction. In this case, the two guide tongue pieces 21 and 22 are substantially V-shaped, with one guide tongue piece 21 longer than the other guide tongue piece 22 from the open edge 19a side located below the protruding edge portion 19. It is preferable to project integrally so as to form a bowl-like shape. In addition, the guide tongue pieces 21 and 22 can be provided so as to be freely laid down in a state of being independent from the protruding edge portion 19.
[0014]
Of these guide tongue pieces 21 and 22, the guide tongue piece 21 located on the inner side when the bobbin 11 is laid down on the back surface 11a side has at least two through holes 21a and 21b spaced apart from each other. However, at least one through hole 22a is formed in each of the guide tongue pieces 22 located on the outer side. In this case, the through holes 21a and 21b of the one guide tongue piece 21 can be provided with an appropriate length in the column direction and spaced apart as in the illustrated example, and can be separated in the row direction or in the oblique direction. It may be provided by being separated. Further, the through hole 22a of the other guide tongue piece 22 is formed based on a positional relationship that coincides with the through hole 21a of the one guide tongue piece 21 when facing down on the back surface 11a side of the bobbin 11. desirable.
[0015]
Next, the core sensor structure according to the present invention using the bobbin 11 will be described together with the operation of the bobbin 11 while referring to the explanatory views showing the assembly process as FIGS.
[0016]
That is, the core sensor according to the present invention includes a magnetic core 33 that is disposed to face each other as a pair, a bobbin 11 having the above-described structure, and a winding attachment portion positioned between the flange portions 12 and 13 of the bobbin 11. 14 is individually connected to, for example, a start end 36a that is one end drawn from a winding 36 provided on the peripheral surface 14 and a terminal end 36b that is the other end. The external leads 37 and 38 drawn out separately are provided at least.
[0017]
In this case, the magnetic core 33 is accommodated in the bobbin 11 except for the base end meshing portion 34 and the front end meshing portion 35, and the base end meshing portion 34 and the front end meshing portion 35 are the other magnets (not shown). The front end meshing portion and the base end meshing portion included in the core can be meshed with each other in a comb shape.
[0018]
In addition, the winding 36 has one end portion (for example, a start end portion) 36 a on the peripheral surface of the winding attachment portion 14 positioned between the flange portions 12 and 13 of the bobbin 11 in advance from the base end side of the bobbin 11. The other end portion (for example, a termination portion) 36b is applied to the other end portion (for example, a termination portion) after being wound from the leading end side that has been wound up to just the proximal end side or one or more reciprocating windings. By drawing from the base end side, the state shown in FIG.
[0019]
One end portion 36a and the other end portion 36b of the winding 36 drawn out in this way are such that one end portion 36a side is formed with the through hole 21a of the guide tongue piece 21 and the through hole 22a of the guide tongue piece 22. The other end 36b side is inserted into the through hole 21b of the guide tongue piece 21 and led out to the outside. In this case, if necessary, the other end portion (for example, the end portion) 36b of the winding 36 is connected to the through hole 21a of the guide tongue piece 21 and the through hole 22a of the guide tongue piece 22 with the guide tongue piece 21 side. The through hole 21b may be inserted through one end (for example, the start end) 36a of the winding 36.
[0020]
Next, the other end portion (for example, the end portion) 36 b of the winding 36 partially lies on the external lead 38 after the guide tongue piece 21 located on the inner side is laid down toward the back surface 11 a side of the bobbin 11. It is connected to the side of the external lead 38 via a connecting portion 38a that is soldered while giving a certain margin.
[0021]
After the other end 36 b of the winding 36 is connected to the external lead 38, the guide tongue piece 22 positioned on the outside is laid down toward the inner guide tongue piece 21, An end portion (for example, a start end portion) 36a is partially wound around the external lead 37 and connected to the external lead 37 side through a connection portion 37a that is soldered while giving a certain margin. As a result, one end 36a and the other end 36b of the winding 36 are as shown in FIG. 2B in a circular portion surrounded by a two-dot chain line, and FIG. 3 in which this is enlarged. In addition, the external lead 37 and the external lead 38 are connected separately.
[0022]
Thereafter, the connecting portion 38a of the external lead 38 including the other end portion (for example, end portion) 36b of the winding 36 is sandwiched between the guide tongue piece 21 and the guide tongue piece 22, and one end portion of the winding 36 is inserted. The connecting portion 37a of the external lead 37 including the (for example, the starting end portion) 36a is disposed on the guide tongue 22 along the length direction thereof. Then, the insulating tape 39 is wound around the side of the winding 36 located on the base end side together with the guide tongues 21 and 22 which are laid down on the side of the winding 36 so as to function as an insulating plate. By separately pulling out 38 to the outside, the sensor unit 32 shown in FIG. 2C is formed. The sensor unit 32 is used as the core sensor 31 of the clamp-type ammeter by being housed in an insulated state in a shield case (not shown).
[0023]
At this time, when the length of the guide tongue piece 21 located on the inner side is longer than that of the guide tongue piece 22 located on the outer side, the position of the through hole 21b is longer than the position of the through hole 21a. Even if it is located outside in the vertical direction, the connection portion 38a of the external lead 38 including the other end portion (for example, termination portion) 36b of the winding 36 is reliably isolated from the side of the winding 36 and insulated. be able to.
[0024]
Further, the two guide tongue pieces 21 and 22 project from the open side edge 19a located on the lower edge side of the projecting edge portion 19 located on the proximal side on the other side bobbin portion 18 so as to project in a bowl shape. If it is, the insulation tape 39 can be smoothly wound with good finish with less unevenness because it can be densely laid down along the winding 36 located on the back side of the bobbin 11.
[0025]
【The invention's effect】
As described above, according to the present invention, one end portion and the other end portion of the winding are two guide tongue pieces protruding from the flange portion side located on the base end side of the bobbin. Can be pulled out by inserting through each through hole, so that one end side and the other end side can be correctly sorted out to the outside without short-circuiting each other. .
[0026]
In addition, the guide tongue piece can function as an insulating plate for the winding by lying down, so wrap the insulating tape so that the connection part with the external lead does not come into direct contact with the winding. It is possible to eliminate the pre-processing, and to simplify the work.
[0027]
In addition, the connecting portion between one end of the winding and the external lead and the connecting portion between the other end and the external lead can be easily and reliably isolated via the two guide tongue pieces. Therefore, the lead-out operation of the external lead can be simplified to the extent that no skill is required.
[0028]
When the two guide tongue pieces are protruded from the flange portion side of the bobbin so as to have a substantially V-shape, the guide tongue pieces are closely laid down along the winding located on the back side of the bobbin. Therefore, the insulating tape can be smoothly wound with good finish with less unevenness.
[Brief description of the drawings]
FIG. 1 shows an example of a bobbin according to the present invention on the left half side, in which (A) is a rear view before assembly, (B) is a rear view after assembly, and (D) is a rear view. The right side view is shown respectively.
FIG. 2 is an explanatory view showing an assembly process for an example of a core sensor structure according to the present invention, in which (a) shows a state in which one end and the other end of a winding are pulled out (b) ) Shows the state where one end and the other end of the winding are connected to the lead wire through the guide tongue piece separately, and (c) shows the guide tongue piece lying down on the back side of the winding for insulation. The state where the tape is wound and the lead wire is pulled out is shown.
FIG. 3 is a main part explanatory view showing an enlarged circular go portion in FIG.
FIG. 4 is an explanatory view showing an assembling process for an example of a conventional core sensor structure, in which (a) shows a state in which lead wires are individually connected to a start end portion and a termination end portion of a drawn-out winding; (B) shows a state in which an insulating tape is wound and a lead wire is pulled out.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Bobbin 11a Back surface 12,13 Flange part 14 Winding attachment part 15 One side bobbin part 16,17 Projection edge part 18 Other side bobbin part 19,20 Projection edge part 20a Open edge 21,22 Guide tongue piece 21a, 21b, 22a Through-hole 31 Core sensor 32 Sensor part 33 Magnetic core 34 Tip engagement part 35 Base end engagement part 36 Winding 36a One end part (start end part)
36b The other end (termination)
37, 38 External leads 37a, 38a Connection part 39 Insulating tape

Claims (3)

Each of the magnetic cores that are opposed to each other as a pair is divided into two parts so as to be covered and wound so as to be wound, and at the time of the fitting, a flange portion is provided on each proximal end side and distal end side. In a bobbin for a clamp-type ammeter comprising a one-side bobbin portion and an other-side bobbin portion provided with a projecting edge portion that can be formed,
Two guide tongue pieces are provided in a projecting manner so as to be able to fall down in the outer peripheral direction on the projecting edge provided on the base end side of one of the one side bobbin part and the other side bobbin part. When the tongue is laid down on the back side of the bobbin, the guide tongue located on the inside has at least two through holes spaced apart from each other, and the guide tongue located on the outside has at least one through hole. A bobbin for a clamp-type ammeter, characterized in that it can be freely inserted into and separated from one end portion and the other end portion that are respectively drawn out from the winding. 2. The bobbin for a clamp type ammeter according to claim 1, wherein the guide tongue piece protrudes in a hook shape having a substantially V shape from an open edge side located below the protruding edge portion. A pair of opposingly arranged magnetic cores, and two protrusions that can be divided to cover each of the magnetic cores and that can form flange portions on the proximal end side and the distal end side when fitted. A bobbin composed of a one-side bobbin portion and an other-side bobbin portion provided with an edge, and one end and the other drawn from a winding provided on a peripheral surface located between the flange portions of the bobbin In the core sensor of the clamp-type ammeter comprising at least an external lead that is individually connected to the end of the base and pulled out separately from the base end side,
The projecting edge provided on the base end side of either the one side bobbin part or the other side bobbin part is provided with two guide tongue pieces projecting in the outer peripheral direction so as to be able to fall down. Of the tongue pieces, at least two through-holes spaced apart from each other are provided in the guide tongue piece located on the inner side when lying down on the back side of the bobbin, and at least one through hole is provided in the guide tongue piece located on the outer side. Each through-hole is provided, and one end of the winding is led out through one through-hole of the guide tongue located inside, and the other end of the winding is located inside The other through hole of the guide tongue piece and one through hole of the guide tongue piece located outside are inserted into the outside and connected to the external lead separately, and these guide tongue pieces are connected to the back surface of the bobbin. Insulated tape with the external lead connections under the condition of lying down Core sensor structure of the clamp type current meter, characterized in that drawn outside the outer leads to each other and covered with wood.

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