CN202307878U - Flake-type circuit protective device - Google Patents
Flake-type circuit protective device Download PDFInfo
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- CN202307878U CN202307878U CN2011200766116U CN201120076611U CN202307878U CN 202307878 U CN202307878 U CN 202307878U CN 2011200766116 U CN2011200766116 U CN 2011200766116U CN 201120076611 U CN201120076611 U CN 201120076611U CN 202307878 U CN202307878 U CN 202307878U
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Abstract
The utility model discloses a flake-type circuit protective device which includes a PTC chip which is provided with a first electrode surface and a second electrode surface, a flake-type diode which is provided with a first electrode surface and a second electrode surface, and at least two substrate units. The surfaces of the substrate unit are provided with three conductors and three external electrodes. The PTC chip, the flake-type diode, and the substrate unit are stacked to each other. An insulating protective layer which covers the flake-type diode and the PTC chip is arranged between the at least two substrate units. Three conductive through holes which enable the three conductors to connect with the three external electrodes are arranged in each of the substrate units and the insulating protective layer. Because the PCB type substrate units are adopted to form the circuit protective device, the manufacturing cost is reduced, and the thickness of the entire circuit protective device is also reduced. The flake-type circuit protective device is suitable for mass industrial production, and is time-saving and labor-saving, and can greatly improve the production efficiency.
Description
Technical field
The utility model relates to a kind of type circuit brake, relates in particular to a kind of sheet type circuit brake of the PTC of comprising chip.
Background technology
The structural representation of a kind of traditional circuit brake that comprises the PTC chip 280 of Fig. 1; Fig. 2 is the cutaway view of Fig. 1.
In conventional art illustrated in figures 1 and 2, PTC (Positive Temperature Coefficient positive temperature coefficient) chip comprises first metal electrode layer 248 and second metal electrode layer 250 on ptc material 246 and the both side surface that covers ptc material 246.
As depicted in figs. 1 and 2; Circuit brake 280 comprises above-mentioned PTC chip and the diode 244 that is welded on first metal electrode layer 248 of PTC chip; An electrode of diode is electrically connected with first metal electrode layer 248 of PTC chip; Another electrode is drawn through lead 258, and an electrode of PTC chip is drawn through lead 259, and another electrode is formed by the part 262 of the second exposed metal electrode layer 250.And, on entire circuit protection device 280, be coated with insulating cement 249,251.
In traditional circuit protection device illustrated in figures 1 and 2, the electrode of PTC chip and diode need be drawn with lead 258,259, therefore; Need lead 258,259 be welded on the electrode of diode and PTC chip; Waste time and energy, have a strong impact on production efficiency, be inappropriate for extensive manufacturing.
In view of above-mentioned technical problem, be necessary to design in fact and a kind ofly can improve manufacturing efficient, and be applicable to the circuit brake of extensive manufacturing.
The utility model content
Therefore, in order effectively to solve technical problems such as the production efficiency that exists in the prior art is low, at least one aspect of the utility model is to propose a kind of type circuit brake.
An aspect according to the utility model proposes a kind of type circuit brake, comprising: PTC chip, said PTC chip have first electrode surface and second electrode surface relative with first electrode surface; Sheet type diode, said type diode has first electrode surface and second electrode surface relative with first electrode surface; At least two base board units are formed with three conductors and three external electrodes corresponding respectively with three conductors at least on the surface of said two base board units.Wherein, Said PTC chip, sheet type diode and base board unit are range upon range of each other; And between said two base board units, be formed with the insulating protective layer that covers said type diode and PTC chip at least, in said base board unit and said insulating protective layer, be formed with three conductive through holes that make three conductors and three external electrode electrical interconnections respectively.An electrode surface of said PTC chip and first electrode surface of said type diode are electrically connected with same external electrode through a conductor, and another electrode surface of said PTC chip and second electrode surface of said type diode form through two external electrodes of other two conductors and other respectively and be electrically connected.
In a preferred embodiment of the utility model, each electrode surface of said PTC chip and said type diode forms with corresponding conductor through surface-pasted mode (SMT) respectively and is electrically connected.
In a preferred embodiment of the utility model, said type circuit brake comprises two base board units, is respectively bottom substrate unit and head substrate unit.Be formed with first conductor and second conductor that mutual electricity is isolated on the upper surface of said bottom substrate unit, be formed with first external electrode, second external electrode and the 3rd external electrode that mutual electricity is isolated on the lower surface.Be formed with the 3rd conductor on the lower surface of said head substrate unit, be formed with first external electrode, second external electrode and the 3rd external electrode that mutual electricity is isolated on the upper surface.Said PTC chip and sheet type diode are between bottom substrate unit and head substrate unit; And first electrode surface of said PTC chip is electrically connected with first conductor of bottom substrate unit; Second electrode surface of sheet type diode is electrically connected with second conductor of bottom substrate unit, and first electrode surface of second electrode surface of PTC chip and sheet type diode is electrically connected with the 3rd conductor of head substrate unit simultaneously.In said bottom substrate unit and head substrate unit, be formed with first conductive through hole, second conductive through hole and the 3rd conductive through hole respectively, said first, second is electrically connected with the 3rd external electrode with said first, second through first, second and the 3rd conductive through hole respectively with the 3rd conductor.
In another preferred embodiment of the utility model, said PTC chip has identical thickness with said type diode.
In another preferred embodiment of the utility model, said type circuit brake comprises three base board units, is respectively bottom substrate unit, Intermediate substrate unit and head substrate unit.Be formed with first conductor on the upper surface of said bottom substrate unit, be formed with first external electrode, second external electrode and the 3rd external electrode that mutual electricity is isolated on the lower surface.Be formed with second conductor on the lower surface of said Intermediate substrate unit, and in said Intermediate substrate unit, be formed with the window that runs through.Be formed with the 3rd conductor on the lower surface of said head substrate unit, be formed with first external electrode, second external electrode and the 3rd external electrode that mutual electricity is isolated on the upper surface.Wherein, said PTC chip is between bottom substrate unit and Intermediate substrate unit, and first electrode surface of PTC chip is electrically connected with said first conductor of bottom substrate unit, and second electrode surface is electrically connected with second conductor of Intermediate substrate unit.Said type diode is arranged in the window of Intermediate substrate unit; Thereby make first electrode surface of sheet type diode directly be electrically connected with second electrode surface of PTC chip, second electrode surface of sheet type diode is electrically connected with the 3rd conductor of head substrate unit simultaneously.In said bottom substrate unit, Intermediate substrate unit and head substrate unit, be formed with first conductive through hole, second conductive through hole and the 3rd conductive through hole respectively, said first, second is electrically connected with the 3rd external electrode with said first, second through first, second and the 3rd conductive through hole respectively with the 3rd conductor.
In another preferred embodiment of the utility model, said type diode has identical thickness with said Intermediate substrate unit.
In another preferred embodiment of the utility model, said type circuit brake comprises three base board units, is respectively bottom substrate unit, Intermediate substrate unit and head substrate unit; Be formed with first conductor on the upper surface of said bottom substrate unit, be formed with first external electrode, second external electrode and the 3rd external electrode that mutual electricity is isolated on the lower surface; Be formed with second conductor on the lower surface of said Intermediate substrate unit, and in said Intermediate substrate unit, be formed with at least one conductive through hole, said at least one conductive through hole extends through second conductor downwards from the upper surface of middle base board unit; Be formed with the 3rd conductor on the lower surface of said head substrate unit, be formed with first external electrode, second external electrode and the 3rd external electrode that mutual electricity is isolated on the upper surface; In said bottom substrate unit, Intermediate substrate unit and head substrate unit, be formed with first conductive through hole, second conductive through hole and the 3rd conductive through hole respectively, said first, second is electrically connected with the 3rd external electrode with said first, second through first, second and the 3rd conductive through hole respectively with the 3rd conductor; Wherein, Said PTC chip is between bottom substrate unit and Intermediate substrate unit; And first electrode surface of PTC chip is electrically connected with said first conductor of bottom substrate unit; Second electrode surface is electrically connected with second conductor of Intermediate substrate unit; Said type diode is arranged between Intermediate substrate unit and the head substrate unit, and first electrode surface of sheet type diode is electrically connected with second electrode surface of PTC chip through said at least one conductive through hole, and second electrode surface of sheet type diode is electrically connected with the 3rd conductor of head substrate unit simultaneously.
In another preferred embodiment of the utility model; Be formed with the 4th conductor on the upper surface of said Intermediate substrate unit; Said at least one conductive through hole extends through said the 4th conductor, and first electrode surface of said type diode is electrically connected with the 4th conductor of said Intermediate substrate unit.
In another preferred embodiment of the utility model, the 4th conductor dbus of said Intermediate substrate unit is crossed second conductive through hole and is electrically connected with said second external electrode.
In another preferred embodiment of the utility model, each said base board unit is a pcb board, and the said conductor on each said base board unit is the circuit diagram that is formed on the said pcb board.
In another preferred embodiment of the utility model; Each said base board unit is a pcb board; Said conductor on each said base board unit is a conducting strip, and the shape of the electrode surface that directly is electrically connected of the shape of said conducting strip and said conducting strip is complementary.
In another preferred embodiment of the utility model, each said base board unit is a pcb board, and the external electrode on the lower surface of said bottom substrate unit and/or the upper surface of head substrate unit is the electrode slice that is printed on the pcb board.
In another preferred embodiment of the utility model, the shape of the electrode slice on the lower surface of said bottom substrate unit and/or the upper surface of head substrate unit is suitable for surface mount (surfacemounting).
In the utility model, owing to adopt base board unit to form sheet type circuit brake based on pcb board.Therefore, the electrode of PTC chip and diode can be drawn through the conductor that forms on the base board unit.And in conventional art, the lead (lead) of costliness and the electrode that lead frame (lead frame) is drawn PTC chip and diode need be provided.Therefore, compare with conventional art, the utility model has saved expensive lead and lead frame; With the process of welding lead and lead frame, therefore, reduced manufacturing cost; And thinner based on the base board unit thickness of pcb board, thus the thickness of entire circuit protection device reduced, and also be suitable for the large-scale industry manufacturing based on the base board unit of pcb board; Therefore, time saving and energy saving, can greatly improve manufacturing efficient.
Description of drawings
Fig. 1 shows a kind of structural representation of the traditional circuit brake that comprises the PTC chip;
Fig. 2 is the cutaway view of Fig. 1;
Fig. 3 shows the sketch map according to the sheet type circuit brake of first embodiment of the exemplary of the utility model, and it shows the upper surface of each base board unit;
Fig. 4 shows the sketch map according to the sheet type circuit brake of first embodiment of the exemplary of the utility model, and it shows the lower surface of each base board unit;
Fig. 5 shows the sketch map according to the sheet type circuit brake of second embodiment of the exemplary of the utility model, and it shows the upper surface of each base board unit;
Fig. 6 shows the sketch map according to the sheet type circuit brake of second embodiment of the exemplary of the utility model, and it shows the lower surface of each base board unit;
Fig. 7 shows the sketch map according to the sheet type circuit brake of the 3rd embodiment of the exemplary of the utility model, and it shows the upper surface of each base board unit; With
Fig. 8 shows the sketch map according to the sheet type circuit brake of the 3rd embodiment of the exemplary of the utility model, and it shows the lower surface of each base board unit.
Embodiment
Describe the embodiment of the utility model below in detail, the example of embodiment is shown in the drawings, and wherein same or analogous label is represented same or analogous element.The embodiment that is described with reference to the drawings below is exemplary, is intended to explain the utility model, and can not be interpreted as the restriction to the utility model.
[first embodiment]
Fig. 3 and Fig. 4 show the sheet type circuit brake according to first embodiment of the exemplary of the utility model.
Like Fig. 3 and shown in Figure 4, sheet type circuit brake comprises PTC chip 130, sheet type diode 140 and two base board units 111,121.
Like Fig. 3 and shown in Figure 4, PTC chip 130 has first electrode surface (for example anodal) and second electrode surface (for example negative pole) relative with first electrode surface.Sheet type diode 140 has first electrode surface (for example anodal) and second electrode surface (for example negative pole) relative with first electrode surface.Two base board units 111,121 are respectively bottom substrate unit 111 and head substrate unit 121.
See also Fig. 3, on the upper surface of bottom substrate unit 111, form first conductor 112 (metallic conduction thin layer or metallic conduction sheet) and second conductor 113 (metallic conduction thin layer or metallic conduction sheet) of electricity isolation each other.See also Fig. 4, first external electrode 1, second external electrode 2 and the 3rd external electrode 3 that form on the lower surface of bottom substrate unit 111 that electricity each other isolates.
See also Fig. 4, on the lower surface of head substrate unit 121, form the 3rd conductor 122 (metallic conduction thin layer or metallic conduction sheet).See also Fig. 3, first external electrode 1, second external electrode 2 and the 3rd external electrode 3 that form on the upper surface of head substrate unit 121 that electricity each other isolates.
Like Fig. 3 or shown in Figure 4, PTC chip 130 and sheet type diode 140 are arranged between bottom substrate unit 111 and the head substrate unit 121, and PTC chip 130 is positioned at same one deck with sheet type diode 140.
As shown in Figure 3, first electrode surface of PTC chip 130 is electrically connected with first conductor 112 of bottom substrate unit 111, and second electrode surface of diode 140 is electrically connected with second conductor 113 of bottom substrate unit 111.For example; First electrode surface of PTC chip 130 can be welded on first conductor 112 of bottom substrate unit 111 through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste; Similarly, second electrode surface of diode 140 also can be welded on second conductor 113 of bottom substrate unit 111 through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste.
As shown in Figure 4, second electrode surface of PTC chip 130 and first electrode surface of diode 140 are electrically connected with the 3rd conductor 122 of head substrate unit 121 simultaneously.For example, first electrode surface of second electrode surface of PTC chip 130 and diode 140 can be welded on the 3rd conductor 122 of head substrate unit 121 through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste simultaneously.Therefore, first electrode surface of second electrode surface of PTC chip 130 and diode 140 is electrically connected through the 3rd conductor 122 of head substrate unit 121 each other.
In the embodiment of illustrated exemplary; The positive pole of diode 140 (first electrode surface) is electrically connected through the 3rd common conductor 122 with the negative pole (second electrode surface) of PTC chip 130, thereby realizes being electrically connected in series of diode 140 and PTC chip 130.But the utility model is not limited to this, also can the negative pole of diode 140 and the positive pole of PTC chip 130 be electrically connected through the 3rd common conductor 122.
Like Fig. 3 and shown in Figure 4, bottom substrate unit 111, PTC chip 130, sheet type diode 140 and head substrate unit 121 are stacked together each other.In the above-described embodiments,, after range upon range of, between bottom substrate unit 111 and head substrate unit 121, pour into insulating cement, be used to form the insulating protective layer that covers PTC chip 130 and sheet type diode 140 although not shown.
See also Fig. 3 and Fig. 4, in bottom substrate unit 111, head substrate unit 121 and insulating protective layer, be formed with first conductive through hole 101, second conductive through hole 102 and the 3rd conductive through hole 103 respectively.First, second is electrically connected with first, second and the 3rd external electrode 1,2,3 through first, second and the 3rd conductive through hole 101,102,103 respectively with the 3rd conductor 112,113,122.
In order to improve PTC chip 130 and the reliability that be electrically connected of diode 140 with bottom substrate unit 111 and head substrate unit 121, in a preferred embodiment, the PTC chip 130 that is positioned at one deck has roughly the same thickness with diode 140.
In first embodiment of the utility model, bottom substrate unit 111 is with head substrate unit 121 and adopts the preformed pcb board of pcb board manufacturing process, and the conductor on it is the circuit diagram on the pcb board.In first embodiment, the electrode of PTC chip 130 and diode 140 is drawn through the conductor on the pcb board, conductive through hole and external electrode, therefore, extra lead and lead frame need be provided, and not need welding lead and lead frame.
Like Fig. 3 and shown in Figure 4; In a preferred embodiment; Each base board unit 111,121 is a pcb board, and the conductor 112,113,122 on each base board unit 111,121 is a conducting strip, and the shape of the electrode surface that directly is electrically connected of the shape of conducting strip and conducting strip is complementary.Thereby this shape that is complementary can strengthen the effect that the contact area of conducting strip and electrode surface plays fin to greatest extent.
Like Fig. 3 and shown in Figure 4, in a preferred embodiment, each base board unit 111,121 is a pcb board, and the external electrode 1,2,3 on the upper surface of the lower surface of bottom substrate unit 111 and/or head substrate unit 121 is the electrode slice that is printed on the pcb board.And the shape of these electrode slices is suitable for surface mount (surface mounting), and like this, formed type circuit brake can be through these electrode slice surface mount to other printed circuit board (PCB).
[second embodiment]
Fig. 5 and Fig. 6 show the sheet type circuit brake according to second embodiment of the exemplary of the utility model.
Like Fig. 5 and shown in Figure 6, sheet type circuit brake comprises PTC chip 240, sheet type diode 250 and three base board units 211,221,231.
Like Fig. 5 and shown in Figure 6, PTC chip 240 has first electrode surface (for example anodal) and second electrode surface (for example negative pole) relative with first electrode surface.Sheet type diode 250 has first electrode surface (for example anodal) and second electrode surface (for example negative pole) relative with first electrode surface.Three base board units 211,221,231 are respectively bottom substrate unit 211, Intermediate substrate unit 221 and head substrate unit 231.
See also Fig. 5, on the upper surface of bottom substrate unit 211, form first conductor 212 (metallic conduction thin layer or metallic conduction sheet).See also Fig. 6, first external electrode 1, second external electrode 2 and the 3rd external electrode 3 that form on the lower surface of bottom substrate unit 211 that electricity each other isolates.
See also Fig. 6, on the lower surface of Intermediate substrate unit, form second conductor 222 (metallic conduction thin layer or metallic conduction sheet).See also Fig. 5, in the Intermediate substrate unit, be formed with the window 223 that runs through.
See also Fig. 6, on the lower surface of head substrate unit 231, form the 3rd conductor 232 (metallic conduction thin layer or metallic conduction sheet).See also Fig. 5, first external electrode 1, second external electrode 2 and the 3rd external electrode 3 that form on the upper surface of head substrate unit 231 that electricity each other isolates.
Like Fig. 5 and shown in Figure 6; PTC chip 240 is between bottom substrate unit 211 and Intermediate substrate unit 221; And first electrode surface of PTC chip 240 is electrically connected with first conductor 212 of bottom substrate unit 211; Second electrode surface of PTC chip 240 is electrically connected with second conductor 222 of Intermediate substrate unit 221; For example; First electrode surface of PTC chip 240 can be welded on first conductor 212 of bottom substrate unit 211 through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste, and similarly, second electrode surface of PTC chip 240 also can be welded on second conductor 222 of Intermediate substrate unit 221 through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste.
Like Fig. 5 and shown in Figure 6; Diode 250 is arranged in the window 223 of Intermediate substrate unit 221; Thereby make first electrode surface (lower surface) of diode 250 directly be electrically connected with second electrode surface (upper surface) of PTC chip 240; Second electrode surface of diode 250 is electrically connected with the 3rd conductor 232 of head substrate unit 231 simultaneously; For example; First electrode surface of diode 250 and second electrode surface of PTC chip 240 can be welded to each other together through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste, and similarly, second electrode surface of diode 250 also can be welded on the 3rd conductor 232 of head substrate unit 231 through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste.
In the embodiment of illustrated exemplary, the positive pole of diode 250 (first electrode surface) is electrically connected through directly contacting with the negative pole (second electrode surface) of PTC chip 240, thereby realizes being electrically connected in series of diode 250 and PTC chip 240.But the utility model is not limited to this, also can the negative pole of diode 250 be electrically connected through directly contacting with the positive pole of PTC chip 240.
In Fig. 5 and embodiment shown in Figure 6, because diode 250 is arranged in the window 223 of Intermediate substrate unit 221, therefore, diode 250 is positioned at same one deck with Intermediate substrate unit 221.In order to improve PTC chip 130 and the reliability that be electrically connected of diode 140 with bottom substrate unit 211 and head substrate unit 231, in a preferred embodiment, the diode 250 that is positioned at one deck has roughly the same thickness with Intermediate substrate unit 221.
Like Fig. 5 and shown in Figure 6, bottom substrate unit 211, PTC chip 240, Intermediate substrate unit 221, sheet type diode 250 and head substrate unit 231 are stacked together each other.In the above-described embodiments,, after range upon range of, between bottom substrate unit 211, Intermediate substrate unit 221 and head substrate unit 231, pour into insulating cement, be used to form the insulating protective layer that covers PTC chip 240 and sheet type diode 250 although not shown.
Like Fig. 5 and shown in Figure 6, in bottom substrate unit 211, Intermediate substrate unit 221, head substrate unit 231 and insulating protective layer, be formed with first conductive through hole 201, second conductive through hole 202 and the 3rd conductive through hole 203 respectively.Aforementioned first, second is electrically connected with first, second and the 3rd external electrode 1,2,3 through first, second and the 3rd electric through-hole 201,202,203 respectively with the 3rd conductor 212,222,232.
In second embodiment of the utility model, bottom substrate unit 211, Intermediate substrate unit 221 and head substrate unit 231 are and adopt the preformed pcb board of pcb board manufacturing process, and the conductor on it is the circuit diagram on the pcb board.In a second embodiment, the electrode of PTC chip 240 and diode 250 is drawn through the conductor on the pcb board, conductive through hole and external electrode, therefore, extra lead and lead frame need be provided, does not also need welding lead and lead frame.
Like Fig. 5 and shown in Figure 6; In a preferred embodiment; Each base board unit 211,221,231 is a pcb board; Conductor 212,222,232 on each base board unit 211,221,231 is a conducting strip, and the shape of the electrode surface that directly is electrically connected of the shape of conducting strip and conducting strip is complementary.Thereby this shape that is complementary can strengthen the effect that the contact area of conducting strip and electrode surface plays fin to greatest extent.
Like Fig. 5 and shown in Figure 6; In a preferred embodiment; Each base board unit 211,221,231 is a pcb board, and the external electrode 1,2,3 on the upper surface of the lower surface of bottom substrate unit 211 and/or head substrate unit 231 is the electrode slice that is printed on the pcb board.And the shape of these electrode slices is suitable for surface mount (surface mounting), and like this, formed type circuit brake can be through these electrode slice surface mount to other printed circuit board (PCB).
[the 3rd embodiment]
Fig. 7 and Fig. 8 show the sheet type circuit brake according to the 3rd embodiment of the exemplary of the utility model.
Like Fig. 7 and shown in Figure 8, sheet type circuit brake comprises PTC chip 340, sheet type diode 350 and three base board units 311,321,331.
Like Fig. 7 and shown in Figure 8, PTC chip 340 has first electrode surface (for example anodal) and second electrode surface (for example negative pole) relative with first electrode surface.Sheet type diode 350 has first electrode surface (for example anodal) and second electrode surface (for example negative pole) relative with first electrode surface.Three base board units 311,321,331 are respectively bottom substrate unit 311, Intermediate substrate unit 321 and head substrate unit 331.
See also Fig. 7, on the upper surface of bottom substrate unit 311, form first conductor 312 (metallic conduction thin layer or metallic conduction sheet).See also Fig. 8, first external electrode 1, second external electrode 2 and the 3rd external electrode 3 that form on the lower surface of bottom substrate unit 311 that electricity each other isolates.
See also Fig. 8, on the lower surface of Intermediate substrate unit 321, form the second conductor 322b (metallic conduction thin layer or metallic conduction sheet).See also Fig. 7 and Fig. 8, in Intermediate substrate unit 321, be formed with at least one conductive through hole 323, this conductive through hole 323 extends through the second conductor 322b on the lower surface of Intermediate substrate unit 321 downwards from the upper surface of middle base board unit 321.
See also Fig. 8, on the lower surface of head substrate unit 331, form the 3rd conductor 332 (metallic conduction thin layer or metallic conduction sheet).See also Fig. 7, first external electrode 1, second external electrode 2 and the 3rd external electrode 3 that form on the upper surface of head substrate unit 331 that electricity each other isolates.
Like Fig. 7 and shown in Figure 8; PTC chip 340 is between bottom substrate unit 311 and Intermediate substrate unit 321; And first electrode surface of PTC chip 340 is electrically connected with first conductor 312 of bottom substrate unit 311; Second electrode surface of PTC chip 340 is electrically connected with the second conductor 322b of Intermediate substrate unit 321; For example; First electrode surface of PTC chip 340 can be welded on first conductor 312 of bottom substrate unit 311 through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste, and similarly, second electrode surface of PTC chip 340 also can be welded on the second conductor 322b of Intermediate substrate unit 321 through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste.
Like Fig. 7 and shown in Figure 8; Diode 350 is arranged between Intermediate substrate unit 321 and the head substrate unit 331; First electrode surface (lower surface) of diode 350 is electrically connected with second electrode surface (upper surface) of PTC chip 340 through the conductive through hole 323 in the Intermediate substrate unit 321, and second electrode surface (upper surface) of diode 350 directly is electrically connected with the 3rd conductor 332 of head substrate unit 331 simultaneously.
In the embodiment of illustrated exemplary, the positive pole of diode 350 (first electrode surface) is electrically connected through conductive through hole 323 with the negative pole (second electrode surface) of PTC chip 340, thereby realizes being electrically connected in series of diode 350 and PTC chip 340.But the utility model is not limited to this, also can the negative pole of diode 350 and the positive pole of PTC chip 340 be electrically connected through conductive through hole 323.
As shown in Figure 7, in the embodiment of an exemplary of the present invention, also on the upper surface of Intermediate substrate unit 321, be formed with the 4th conductor 322a (metallic conduction thin layer or metallic conduction sheet).At least one conductive through hole 323 extends through the 4th conductor 322a.Like this, first electrode surface (lower surface) of diode 350 can be welded on the 4th conductor 322a of Intermediate substrate unit 321 through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste.Similarly, second electrode surface of diode 350 also can be welded on the 3rd conductor 332 of head substrate unit 331 through the mode with surface mount (SMT) such as solder(ing) paste or conductive paste.
Like Fig. 7 and shown in Figure 8, bottom substrate unit 311, PTC chip 340, Intermediate substrate unit 321, sheet type diode 350 and head substrate unit 331 are stacked together each other.In the above-described embodiments,, after range upon range of, between bottom substrate unit 311, Intermediate substrate unit 321 and head substrate unit 331, pour into insulating cement, be used to form the insulating protective layer that covers PTC chip 340 and sheet type diode 350 although not shown.
Like Fig. 7 and shown in Figure 8, in bottom substrate unit 311, Intermediate substrate unit 321, head substrate unit 331 and insulating protective layer, be formed with first conductive through hole 301, second conductive through hole 302 and the 3rd conductive through hole 303 respectively.Aforementioned first, second is electrically connected with first, second and the 3rd external electrode 1,2,3 through first, second and the 3rd conductive through hole 301,302,303 respectively with the 3rd conductor 312,322b, 332.Simultaneously, aforementioned the 4th conductor 322a also is electrically connected with second external electrode 2 through second conductive through hole 302.
In the 3rd embodiment of the utility model, bottom substrate unit 311, Intermediate substrate unit 321 and head substrate unit 331 are and adopt the preformed pcb board of pcb board manufacturing process, and the conductor on it is the circuit diagram on the pcb board.In a second embodiment, the electrode of PTC chip 340 and diode 350 is drawn through the conductor on the pcb board, conductive through hole and external electrode, therefore, extra lead and lead frame need be provided, does not also need welding lead and lead frame.
Like Fig. 7 and shown in Figure 8; In a preferred embodiment; Each base board unit 311,321,331 is a pcb board; Conductor 312 on each base board unit 311,321,331,322a, 322b, 332 are conducting strip, and the shape of the electrode surface that directly is electrically connected of the shape of conducting strip and conducting strip is complementary.Thereby this shape that is complementary can strengthen the effect that the contact area of conducting strip and electrode surface plays fin to greatest extent.
Like Fig. 7 and shown in Figure 8; In a preferred embodiment; Each base board unit 311,321,331 is a pcb board, and the external electrode 1,2,3 on the upper surface of the lower surface of bottom substrate unit 311 and/or head substrate unit 331 is the electrode slice that is printed on the pcb board.And the shape of these electrode slices is suitable for surface mount (surface mounting), and like this, formed type circuit brake can be through these electrode slice surface mount to other printed circuit board (PCB).
Although illustrated and described the embodiment of the utility model; For those of ordinary skill in the art; Be appreciated that under the situation of principle that does not break away from the utility model and spirit and can change that the scope of the utility model is limited accompanying claims and equivalent thereof to these embodiment.
Claims (13)
1. a sheet type circuit brake is characterized in that, comprising:
PTC chip (130), said PTC chip have first electrode surface and second electrode surface relative with first electrode surface;
Sheet type diode (140), said type diode has first electrode surface and second electrode surface relative with first electrode surface; With
At least two base board units are formed with three conductors and three external electrodes corresponding respectively with three conductors at least on the surface of said two base board units,
Wherein, Said PTC chip, sheet type diode and base board unit are range upon range of each other; And between said two base board units, be formed with the insulating protective layer that covers said type diode and PTC chip at least; In said base board unit and said insulating protective layer, be formed with three conductive through holes that make three conductors and three external electrode electrical interconnections respectively
An electrode surface of said PTC chip and first electrode surface of said type diode are electrically connected with same external electrode through a conductor, and another electrode surface of said PTC chip and second electrode surface of said type diode form through two external electrodes of other two conductors and other respectively and be electrically connected.
2. according to claim 1 type circuit brake is characterized in that, each electrode surface of said PTC chip and said type diode forms with corresponding conductor through surface-pasted mode respectively and is electrically connected.
3. according to claim 1 type circuit brake is characterized in that, comprises two base board units (111,121), is respectively bottom substrate unit (111) and head substrate unit (121);
Be formed with first conductor (112) and second conductor (113) that mutual electricity is isolated on the upper surface of said bottom substrate unit, be formed with first external electrode (1), second external electrode (2) and the 3rd external electrode (3) that mutual electricity is isolated on the lower surface;
Be formed with the 3rd conductor (122) on the lower surface of said head substrate unit, be formed with first external electrode (1), second external electrode (2) and the 3rd external electrode (3) that mutual electricity is isolated on the upper surface;
In said bottom substrate unit (111) and head substrate unit (121), be formed with first conductive through hole (101), second conductive through hole (102) and the 3rd conductive through hole (103) respectively, said first, second is electrically connected with the 3rd external electrode (1,2,3) with said first, second through first, second and the 3rd conductive through hole (101,102,103) respectively with the 3rd conductor (112,113,122);
Said PTC chip (130) and sheet type diode (140) are between bottom substrate unit and head substrate unit; And first electrode surface of said PTC chip (130) is electrically connected with first conductor (112) of bottom substrate unit (111); Second electrode surface of sheet type diode (140) is electrically connected with second conductor (113) of bottom substrate unit (111), and first electrode surface of second electrode surface of PTC chip (130) and sheet type diode (140) is electrically connected with the 3rd conductor (122) of head substrate unit (121) simultaneously.
4. according to claim 3 type circuit brake is characterized in that, said PTC chip (130) has identical thickness with said type diode (140).
5. according to claim 1 type circuit brake is characterized in that, comprises three base board units (211,221,231), is respectively bottom substrate unit (211), Intermediate substrate unit (221) and head substrate unit (231);
Be formed with first conductor (212) on the upper surface of said bottom substrate unit, be formed with first external electrode (1), second external electrode (2) and the 3rd external electrode (3) that mutual electricity is isolated on the lower surface;
Be formed with second conductor (222) on the lower surface of said Intermediate substrate unit, and in said Intermediate substrate unit, be formed with the window (223) that runs through;
Be formed with the 3rd conductor (232) on the lower surface of said head substrate unit, be formed with first external electrode (1), second external electrode (2) and the 3rd external electrode (3) that mutual electricity is isolated on the upper surface;
In said bottom substrate unit (211), Intermediate substrate unit (221) and head substrate unit (231), be formed with first conductive through hole (201), second conductive through hole (202) and the 3rd conductive through hole (203) respectively, said first, second is electrically connected with the 3rd external electrode (1,2,3) with said first, second through first, second and the 3rd conductive through hole (201,202,203) respectively with the 3rd conductor (212,222,232);
Wherein, Said PTC chip (240) is positioned between bottom substrate unit (211) and Intermediate substrate unit (221); And first electrode surface of PTC chip is electrically connected with said first conductor of bottom substrate unit, and second electrode surface is electrically connected with second conductor of Intermediate substrate unit
Said type diode is arranged in the window of Intermediate substrate unit; Thereby make first electrode surface of sheet type diode directly be electrically connected with second electrode surface of PTC chip, second electrode surface of sheet type diode is electrically connected with the 3rd conductor of head substrate unit simultaneously.
6. according to claim 5 type circuit brake is characterized in that, said type diode has identical thickness with said Intermediate substrate unit.
7. according to claim 1 type circuit brake is characterized in that, comprises three base board units (311,321,331), is respectively bottom substrate unit (311), Intermediate substrate unit (321) and head substrate unit (331);
Be formed with first conductor (312) on the upper surface of said bottom substrate unit, be formed with first external electrode (1), second external electrode (2) and the 3rd external electrode (3) that mutual electricity is isolated on the lower surface;
Be formed with second conductor (322b) on the lower surface of said Intermediate substrate unit; And in said Intermediate substrate unit, be formed with at least one conductive through hole (323), said at least one conductive through hole (323) extends through second conductor (322b) downwards from the upper surface of middle base board unit;
Be formed with the 3rd conductor (332) on the lower surface of said head substrate unit, be formed with first external electrode (1), second external electrode (2) and the 3rd external electrode (3) that mutual electricity is isolated on the upper surface;
In said bottom substrate unit (311), Intermediate substrate unit (321) and head substrate unit (331), be formed with first conductive through hole (201), second conductive through hole (202) and the 3rd conductive through hole (203) respectively, said first, second is electrically connected with said first, second and the 3rd external electrode (1,2,3) through first, second and the 3rd conductive through hole (301,302,303) respectively with the 3rd conductor (312,322b, 332);
Wherein, Said PTC chip (340) is positioned between bottom substrate unit (311) and Intermediate substrate unit (321); And first electrode surface of PTC chip (340) is electrically connected with said first conductor (312) of bottom substrate unit (311); Second electrode surface is electrically connected with second conductor (322b) of Intermediate substrate unit (321)
Said type diode (350) is arranged between Intermediate substrate unit (321) and head substrate unit (331); First electrode surface of sheet type diode (350) is electrically connected with second electrode surface of PTC chip (340) through said at least one conductive through hole (323), and second electrode surface of sheet type diode (350) is electrically connected with the 3rd conductor (332) of head substrate unit (331) simultaneously.
8. according to claim 7 type circuit brake; It is characterized in that; Be formed with the 4th conductor (322a) on the upper surface of said Intermediate substrate unit (321); Said at least one conductive through hole (323) extends through said the 4th conductor (322a), and first electrode surface of said type diode (350) is electrically connected with the 4th conductor (322a) of said Intermediate substrate unit (321).
9. according to claim 8 type circuit brake is characterized in that, the 4th conductor (322a) of said Intermediate substrate unit (321) is electrically connected with said second external electrode (2) through second conductive through hole (302).
10. according to each described type circuit brake among the claim 1-9, it is characterized in that said base board unit is a pcb board, said conductor on the said base board unit and said external electrode are the circuit diagram that is formed on the said pcb board.
11. according to each described type circuit brake among the claim 1-9; It is characterized in that; Said base board unit is a pcb board, and the said conductor on the said base board unit is a conducting strip, and the shape of the electrode surface that directly is electrically connected of the shape of said conducting strip and said conducting strip is complementary.
12. according to each described type circuit brake among the claim 3-9; It is characterized in that; Said base board unit is a pcb board, and the external electrode on the lower surface of said bottom substrate unit and/or the upper surface of head substrate unit is the electrode slice that is formed on the pcb board.
13. according to claim 12 type circuit brake is characterized in that, the shape of the electrode slice on the lower surface of said bottom substrate unit and/or the upper surface of head substrate unit is suitable for surface mount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200766116U CN202307878U (en) | 2011-03-18 | 2011-03-18 | Flake-type circuit protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200766116U CN202307878U (en) | 2011-03-18 | 2011-03-18 | Flake-type circuit protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202307878U true CN202307878U (en) | 2012-07-04 |
Family
ID=46376719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200766116U Expired - Lifetime CN202307878U (en) | 2011-03-18 | 2011-03-18 | Flake-type circuit protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202307878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2991110A3 (en) * | 2014-08-25 | 2016-03-09 | Tyco Electronics (Shanghai) Co. Ltd. | Circuit protection device |
-
2011
- 2011-03-18 CN CN2011200766116U patent/CN202307878U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2991110A3 (en) * | 2014-08-25 | 2016-03-09 | Tyco Electronics (Shanghai) Co. Ltd. | Circuit protection device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180111 Address after: Illinois State Patentee after: Lite Co. Ltd. Address before: American Pennsylvania Patentee before: Tyco Electronics Corp. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
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