CN102779701A - Fusing resistor - Google Patents
Fusing resistor Download PDFInfo
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- CN102779701A CN102779701A CN201210203366XA CN201210203366A CN102779701A CN 102779701 A CN102779701 A CN 102779701A CN 201210203366X A CN201210203366X A CN 201210203366XA CN 201210203366 A CN201210203366 A CN 201210203366A CN 102779701 A CN102779701 A CN 102779701A
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Abstract
The invention provides a fusing resistor which can prevent the reduction in the action reliability caused by the flow of a miniature adhesive, can cut off the electricity reliably when the resistor elements fever abnormally. Resistor elements (3) are carried on an insulating base (2) of the fusing resistor (1) and on the inner underside(20a) of a first recession (20), a winding part (40) of a wound spiral spring (4) is carried on the inner underside (22a) of a second recession (22), the resistor elements are fixed on the insulating base via the adhesive, and a separating wall (24) standing between the resistor elements and the winding part is arranged on the insulating base. The fusing resistor enables the arm part (41) of the wound spiral spring (4) to be jointed with the leads (31) of the resistor elements via a low melting point metal (7) in an elastic formation state, so that when the resistor elements fever abnormally, the low melting point metal (7) fuses, the arm part (41) is separated from the leads (31), and the conduction of the resistor elements and the wound spiral spring is cut off.
Description
Technical field
The present invention relates to the fusing resistor that uses as the protection component of protecting to the overcurrent in the circuit, particularly can utilize with resistive element is connected in series and turned round the helical spring power of holding and the fusing resistor that cuts off energising when the abnormal heating.
Background technology
As this fusing resistor; In the past; Known have to go up at insulating properties base station (pedestal) carry resistive element side by side and turned round helical spring coiling portion; Use low-melting-point metal such as scolding tin with an end of these resistive elements with turned round a helical spring arm and engaged the fusing resistor (for example, with reference to patent documentation 1) that forms.In this existing fusing resistor, turned round helical spring and resistive element and remained on the conducting state that is connected in series, both overcome elastic restoring force and the mechanical connection of resistance arm.In addition; The lead-in wire of deriving and turned round helical spring another arm and connect the through hole of being located at the insulating properties base station and side-prominent to the back side as splicing ear from the other end of resistive element; Under the installment state of fusing resistor, each splicing ear is connected with the terminal installation portion (for example through hole etc.) of circuit board.
The fusing resistor that so roughly constitutes; When resistive element during because of abnormal heatings such as overcurrent flows; Joint is turned round the low-melting-point metal of an end of a helical spring arm and resistive element will fusion, thereby this arm utilizes elastic restoring force from leaving with the junction of resistive element.On its result and since resistive element with turned round helical spring conducting and be cut off, be cut off so comprise the energising of the series circuit of fusing resistor.That is, this fusing resistor utilizes and is turned round helical spring animal power cut-out energising when the resistive element abnormal heating, so have the good advantage of quick-action property, in addition, also has advantage small-sized and that can make at an easy rate.
Patent documentation 1: TOHKEMY 2009-87813 communique
Yet, when the above-mentioned existing fusing resistor of assembling, carry out the resistive element of the assigned position that is equipped on the insulating properties base station being fixed in the bonding process of insulating properties base station through adhesive-applying.Yet; The insulating properties base station is also less in the fusing resistor of miniaturization, therefore, and when carrying out this bonding process; Sometimes bonding agent can flow on the insulating properties base station and arrive the helical spring coiling portion of being turned round; Under this situation,, therefore there is the bad problem of action that is easy to generate because bonding agent can hinder and turned round helical spring strain.Promptly; If bonding agent adheres to and produced harmful effect to turning round helical spring elasticity; Even then because of the abnormal heating of resistive element, the low-melting-point metal fusion is turned round a helical spring arm and also can normally do not carried out elastic return; Thereby energising can not be cut off the danger that existence is caught fire and smoldered.In addition, if use full-bodied bonding agent, then mobile the reduction is difficult for being attached to and turned round helical spring, but because full-bodied bonding agent is not easy to solidify, therefore can damage the productivity of fusing resistor.
In addition; In above-mentioned existing fusing resistor, if advance miniaturization, the resistive element that then is equipped on the insulating properties base station narrows down with the interval of being turned round helical spring coiling portion; Therefore; Because of following the abnormal heating of the resistive element of overcurrent, turned round a helical spring arm and carry out this energising of elastic return and cut off after the action, resistive element with turned round helical spring coiling portion might be because of the arc discharge short circuit.Under this situation, fusing resistor can not positively cut off energising, and therefore, reliable in action property significantly reduces.
Summary of the invention
The present invention accomplishes in view of the actual conditions of this prior art; Its purpose is to provide a kind of fusing resistor; This fusing resistor effectively prevents the reduction because of the mobile reliable in action property that causes of miniaturization, bonding agent, can when the abnormal heating of resistive element, positively cut off energising.
To achieve these goals, the present invention provides a kind of fusing resistor, possesses: the insulating properties base station that has first area and second area in the one side side; Use the resistive element of adhesive securement on above-mentioned first area; And have from the two ends of coiling portion extended a pair of arm and with above-mentioned coiling portion be equipped on the above-mentioned second area and form turned round helical spring; Turned round a helical spring above-mentioned arm and under the state of strain, be connected with an end of above-mentioned resistive element above-mentioned via low-melting-point metal; Simultaneously; The lead-in wire that to derive from the other end of above-mentioned resistive element is as the splicing ear of first through hole that connects above-mentioned insulating properties base station; And; With the above-mentioned splicing ear of being turned round helical spring another above-mentioned arm as second through hole that connects above-mentioned insulating properties base station, be provided with the next door that between above-mentioned first area and above-mentioned second area, erects in the above-mentioned one side side of above-mentioned insulating properties base station.
In the fusing resistor that constitutes like this; When the resistive element that uses bonding agent will be equipped on the first area is fixed on the insulating properties base station; Flowing of bonding agent towards second area stoped by the next door; Therefore, even under the situation that the insulating properties base station is miniaturized, bonding agent can not crossed the next door yet and be attached to the helical spring coiling portion of being turned round.
In addition; With regard to this fusing resistor, owing to can establish the next door in that the resistive element position approaching with being turned round helical spring coiling portion is upright, therefore; Even under the situation that the insulating properties base station is miniaturized, these resistive elements and coiling portion can be not opposed with minimum distance yet.Therefore; After being turned round this energising of a helical spring arm elastic return because of the abnormal heating of the resistive element of following overcurrent and being cut off action, be difficult for having a resistance element with turned round the unfavorable condition of helical spring coiling portion because of the arc discharge short circuit.
In above-mentioned formation; If be communicated with and take in first recess of the other end at least of resistive element with first through hole in the one side side setting of insulating properties base station; And there is the first area in the inner bottom part at this first recess, then can resistive element be equipped on the first area of insulating properties base station with stable posture, and; Bonding agent gets into the internal face of first recess and the gap between the resistive element, thereby has improved the installation strength of resistive element.
In this case, if the next door erects to the position higher than the openend circumference of first recess, then owing to do not worry being coated on the bonding agent of the openend circumference of first recess and cross the next door and be attached to and turned round helical spring, so preferably.
In addition; In above-mentioned formation; If be communicated with and take in second recess of at least a portion of coiling portion with second through hole in the one side side setting of insulating properties base station; And when there is second area in the inner bottom part of this second recess, then can will be turned round the second area that helical spring coiling portion is equipped on the insulating properties base station with stable posture.
In addition; In above-mentioned formation; If be provided with the lead-in wire that front is bent into approximate right angle, and when being turned round a helical spring arm and utilizing low-melting-point metal to be engaged in this bending part, then when carrying out molten the applying of low-melting-point metal, be difficult for producing the position deviation of arm with respect to lead-in wire in an end of resistive element; Therefore, make the molten dimensionally stable that applies of low-melting-point metal easily.
Effect of the present invention is following.
Fusing resistor of the present invention; When the resistive element that will be equipped on the first area with bonding agent is fixed on the insulating properties base station; Can utilize the next door to stop bonding agent to flow towards being equipped with the second area of being turned round helical spring coiling portion; Therefore, even under the situation that the insulating properties base station is miniaturized, bonding agent also can not be crossed the next door and be attached to the helical spring coiling portion of being turned round.Therefore, this fusing resistor can avoid effectively because of bonding agent to adhere to the helical spring action of being turned round of generation bad.In addition; This fusing resistor, owing to can establish the next door in that the resistive element position approaching with being turned round helical spring coiling portion is upright, therefore; Even under the situation that the insulating properties base station is miniaturized, resistive element with turned round helical spring coiling portion can be not opposed with minimum distance yet.Therefore, after action is cut off in energising, be difficult for having a resistance element with turned round the unfavorable condition of helical spring coiling portion because of the arc discharge short circuit, the raising of reliable in action property.
Description of drawings
Fig. 1 is the front view of the fusing resistor of the embodiment of the invention.
Fig. 2 is the key diagram that the cover that dissectd Fig. 1 is represented the internal structure of this fusing resistor.
Fig. 3 is the profile corresponding with Fig. 2 before the adhesive applicating operation.
Fig. 4 is the end view of this fusing resistor.
Fig. 5 is the key diagram that the cover that dissectd Fig. 4 is represented the internal structure of this fusing resistor.
Fig. 6 is the profile corresponding with Fig. 5 before the adhesive applicating operation.
Fig. 7 is the vertical view of this fusing resistor.
Fig. 8 is the key diagram that the cover that dissectd Fig. 7 is represented the internal structure of this fusing resistor.
Fig. 9 is the vertical view of the employed insulating properties base station of this fusing resistor.
Figure 10 is the expression employed resistive element of this fusing resistor and is turned round the helical spring key diagram that engages the state of front and back.
Figure 11 is the front view that expression is installed on this fusing resistor the state of circuit board.
Among the figure: the 1-fusing resistor, 2-insulating properties base station, the 3-resistive element, 4-is turned round helical spring, 5-cover, 6-bonding agent; 7-low melting point scolding tin (low-melting-point metal), 8-display part, 10-circuit board, 11-scolding tin, 20-first recess, 20a-inner bottom surface; 21-first through hole, 22-second recess, the 22a-inner bottom surface, 23-second through hole, the 24-next door, 25-engages protuberance; The 31-lead-in wire, the 31a-bending part, 32-goes between (splicing ear), 40-coiling portion, 41-arm, 42-arm (splicing ear); The 51-engaging recessed part, 52-limits stage portion, 53-notch, S1-first area, S2-second area.
Embodiment
Below, with reference to accompanying drawing execution mode of the present invention is described.Like Fig. 1～shown in Figure 8; The fusing resistor 1 of this execution mode example is equipped with resistive element 3 and the coiling portion 40 of being turned round helical spring 4 side by side on insulating properties base station (pedestal) 2, the arm of being turned round helical spring 4 41 is carried out soldering with the mode that overcomes elastic restoring force and the lead-in wire 31 of resistive element 3.Resistive element 3 utilizes bonding agent 6 to be fixed on the insulating properties base station 2, flows the upright next door 24 that is provided with on insulating properties base station 2 in order to prevent the undesirable of this bonding agent 6.In addition, plastic cover 5 is installed on insulating properties base station 2, covers resistive element 3, the arm 41 of being turned round helical spring 4 and the coiling portion 40 etc. that comprise lead-in wire 31 through this cover 5.In this fusing resistor 1; Arm 41 is engaged with molten the applying of lead-in wire 31 through low melting point scolding tin 7; During the circuit board 10 after being installed on, stated if resistive element 3 abnormal heatings; Then fusion takes place in low melting point scolding tin 7, and arm 41 carries out elastic return, thereby can cut off resistive element 3 and the conducting of being turned round helical spring 4.That is, this fusing resistor 1 utilizes the power of holding of being turned round helical spring 4 to cut off energising when resistive element 3 abnormal heatings, and therefore, quick-action property is good.
Structure to fusing resistor 1 at length describes; As shown in Figure 9; In the upper surface side of insulating properties base station 2, be provided with the circle of the bottom of taking in resistive element 3 first recess 20, take in the second rectangular-shaped recess 22 and the next door 24 that erects in the position that separates these first and second recesses 20,22 of the lower portion of the coiling portion 40 of being turned round helical spring 4.There is the first area S1 that carries resistive element 3 in inner bottom surface 20a at first recess 20, and exposing in the central authorities of this inner bottom surface 20a has first through hole 21.And it is outstanding to the below of insulating properties base station 2 that another lead-in wire 32 of resistive element 3 connects first through hole 21.Have the second area S2 that carries the coiling portion 40 of being turned round helical spring 4 at the inner bottom surface 22a of second recess 22, exposing at this inner bottom surface 22a one jiao has second through hole 23.And it is outstanding to the below of insulating properties base station 2 that another the arm 42 of being turned round helical spring 4 connects second through hole 23.Shown in figure 11, these lead-in wires 32 and arm 42 utilize scolding tin 11 to be connected in to install the terminal installation portion (for example through hole etc.) of the circuit board 10 of fusing resistor 1 respectively as splicing ear.But the fusing point of this scolding tin 11 is higher than the fusing point of low melting point scolding tin 7.
In addition, like Fig. 3 and shown in Figure 6, first through hole 21 and second through hole 23 all form the closer to the big more taper of upper end side diameter.That is being shaped as from the upper, open end that is formed at inner bottom surface 20a of first through hole 21 that, is communicated with first recess 20 narrows down towards lower open end gradually.Likewise, being shaped as from the upper, open end that is formed at inner bottom surface 22a of second through hole 23 that is communicated with second recess 22 narrows down towards lower open end gradually.Therefore, the lead-in wire 32 with resistive element 3 inserts in first recess, 20 side direction, first through hole 21 easily, and the arm 42 that also will be turned round helical spring 4 easily inserts from second recess, 22 side direction, second through hole 23.
In addition, in this execution mode example, connect first through hole 21 and directly be 0.56mm, connect second through hole 23 and directly be 0.35mm as the line of the arm 42 of splicing ear as the line of the lead-in wire 32 of splicing ear.Like this; The line footpath (rugosity) of a pair of splicing ear that fusing resistor 1 is possessed differs from one another, and when fusing resistor 1 is installed on circuit board 10, can easily discern a splicing ear (lead-in wire 32) and another splicing ear (arm 42) through range estimation; Therefore, operation property raising.
The upright next door of being located at insulating properties base station 2 24 is upright is located at the upper surface of insulating properties base station 2 of the openend of the openend that is formed with first recess 20, second recess 22.Like Fig. 3 and shown in Figure 6, the height and position of the upper end in this next door 24 is roughly the same with the height and position of the upper end of the coiling portion 40 of being turned round helical spring 4 of the inner bottom surface 22a that is equipped on second recess 22.In addition, as shown in Figure 9, next door 24 forms the width dimensions of crosscut insulating properties base station 2, promptly forms the width dimensions identical with insulating properties base station 2.Like Fig. 2 and shown in Figure 8, the openend circumference at first recess 20 is coated with bonding agent 6 for fixed resistive element 3, and the effect that when this coating, stops bonding agent 6 to flow into coiling portion 40 sides is played in next door 24.In addition, next door 24, therefore, is not compared with there be the upright structure of establishing next door 24 between 3,40 between the two at the approaching position of resistive element 3 and coiling portion 40, and the opposed interval of resistive element 3 and coiling portion 40 becomes very big.
Of the back; When assembling fusing resistor 1; Shown in Figure 10 (b), the bending part 31a of lead-in wire 31 of leading section and the resistive element 3 of an arm 41 being turned round helical spring 4 is reported to the leadship after accomplishing a task, under this state through low melting point scolding tin 7 molten apply will go between 31 with arm 41 joints.Then; Make another lead-in wire 32 of resistive element 3 insert logical first through hole 21 and second through hole 23 respectively from the upper surface side of insulating properties base station 2 with another arm 42 of being turned round helical spring 4; Resistive element 3 is carried on the inner bottom surface 20a of first recess 20; And, the coiling portion of being turned round helical spring 4 40 is carried on the inner bottom surface 22a of second recess 20.Fig. 3 and Fig. 6 represent like this resistive element 3 and are turned round the state that helical spring 4 is installed on insulating properties base station 2.Promptly; Utilize low melting point scolding tin 7 will go between 31 engage with arm 41 after; Resistive element 3 with turned round helical spring 4 and be assembled on the insulating properties base station 2; Therefore, arm 42 is inserted logical second through holes 23 and is held in the helical spring 4 of being turned round of insulating properties base station 2 and becomes the state that makes arm 41,42 that strain take place to closing direction.Therefore, on the arm of being turned round helical spring 4 41 of fusing resistor 1, always act on flexible restoring force, if 7 fusions of low melting point scolding tin, then arm 41 utilizes the elastic return of self to arrive the position shown in the chain-dotted line of Fig. 2.
Turned round helical spring 4 arm 41,42 two ends from coiling portion 40 extended out, as stated, arm 41 with a little state of pushing deflection by soldering in lead-in wire 31, and another arm 42 is inserted logical second through holes 23.This is turned round helical spring 4 is that processing forms with the zinc-plated wire rod manufacturing of having carried out the stainless steel of surface-treated, even have the high-temperature behavior that elasticity also can not have problems under the high temperature about 300 ℃.In addition, though in this execution mode example, that uses coiling portion 40 with 3 circles of reeling is turned round helical spring 4, can suitably select the number of turns of coiling portion 40 according to arm 41 desired elastic restoring forces.That is, weaken in desire under the situation of elastic restoring force of arm 41,, on the contrary, strengthen in desire under the situation of elastic restoring force of arm 41, as long as the number of turns of increase coiling portion 40 as long as reduce the number of turns of coiling portion 40.
To cover 5 when being installed to insulating properties base station 2; With the resistive element that is connected in series 3 with turned round helical spring 4 and be assembled in advance on the insulating properties base station 2, insulating properties base station 2 is pressed into (perhaps make cover 5 cover insulating properties base station 2) with the modes in insertion such as resistive element 3, coiling portion 40 cover 5 in evolution face 50.When this installation exercise, the engaging protuberance 25 of the side of insulating properties base station 2 slides along cover 5 internal face from open surface 50 sides, therefore, in the moment that embeds the engaging recessed part 51 corresponding with each engaging protuberance 25, covers 5 embeddings and is installed on the insulating properties base station 2.In addition; When carrying out this installation exercise; Defeating into insulating properties base station 2, cover 5 o'clock with excessive; Exist engaging protuberance 25 deeper to insert the possibility in the cover 5, but under this situation, the upper surface circumference of insulating properties base station 2 can be limited with restriction stage portion 52 butts of cover 5 immediately than engaging recessed part 51.That is, restriction stage portion 52 is as preventing that the stop that insulating properties base station 2 inserts in the cover 5 more deeply from playing a role.Therefore, need not to worry to interfere with low melting point scolding tin 7 and arm 41, therefore, need not to worry to cover the reliable in action property generation harmful effect of 5 pairs of fusing resistors 1 owing to insulating properties base station 2 inserts the end face that causes cover 5 in the cover 5 more deeply.Therefore, this cover 5 can be easily and is installed on safely on the insulating properties base station 2.
In addition, like Fig. 1 and shown in Figure 4, the bottom of cover 5 is formed with a plurality of notchs 53.When fusing resistor 1 was installed, these each notchs 53 are used for Visual Confirmation, and on splicing ear (lead-in wire 32 and arm 42), whether to produce soldering bad.Promptly; Shown in figure 11, when circuit board 10 is installed fusing resistors 1, scolding tin 11 is attached to securely insert the splicing ear 32,42 of the through hole that led to this circuit board 10 etc.; But between cover 5 lower end and circuit board 10 when almost very close to each other; Can't confirm to be adsorbed on the circuit board 10 and be attached to the amount and the shape of the scolding tin 11 of splicing ear 32,42, therefore, can't check out that the installation of the fusing resistor 1 that causes because of soldering is bad is bad.Yet, if be formed with notch 53, can Visual Confirmation on circuit board 10, be attached to the amount and the shape of the scolding tin 11 of splicing ear 32,42 in cover 5 bottom, therefore, it is bad not worry can't find soldering.
In addition, as shown in Figure 7, be marked with display part 8 at the upper surface of this cover 5 through methods such as mint-mark or printings, these display part 8 usefulness literal or mark are shown production code member, resistance value of fusing resistor 1 etc. clearly.This display part 8 is marked in cover 5 side mostly, but sometimes on circuit board 10, with the side of fusing resistor 1 in abutting connection with and other electric parts is installed, under this situation, be difficult to the display part 8 that interpretation is marked on cover 5 sides.In contrast, shown in present embodiment,,, also can not produce and hinder, therefore, improve convenience the interpretation of display part 8 even then after fusing resistor 1 is installed if display part 8 is marked on cover 5 upper surface.
When assembling above-mentioned fusing resistor 1; At first; Shown in Figure 10 (a), the bending part 31a of lead-in wire 31 of leading section and the resistive element 3 of the arm 41 of being turned round helical spring 4 is reported to the leadship after accomplishing a task, under this state through low melting point scolding tin 7 molten apply will go between 31 with arm 41 joints.If the helical spring 4 of being turned round to resistive element 3 and no load condition carries out soldering and is connected in series like this, then as Figure 10 (b) shown in, arm 41,42 is configured in and goes between and 31,32 forms on the straight line of predetermined angulars (about 50 spend).
Then; To go between from upper surface (with reference to Fig. 9) side of insulating properties base station 2 and 32 to insert first through hole 21; And arm 42 is inserted second through hole 23; Resistive element 3 is equipped on the inner bottom surface 20a of first recess 20, and, the coiling portion 40 of being turned round helical spring 4 is equipped on the inner bottom surface 22a of second recess 22.Thus, can will be turned round helical spring 4 with a little state of pushing deflection and be assemblied on the insulating properties base station 2, therefore, with arm 41 that lead-in wire 31 engages on always act on flexible restoring force (with reference to Fig. 3).
Afterwards, through with the openend circumference adhesive-applying 6 at first recess 20 such as distributor, resistive element 3 is adhesively fixed on insulating properties base station 2.At this moment, bonding agent 6 gets into the internal face of first recess 20 and the gap between the resistive element 3, and resistive element 3 is adhered to insulating properties base station 2 securely.In addition,, also can't cross next door 24, therefore, not worry that bonding agent 6 can be attached in the coiling portion 40 even bonding agent 6 is mobile to the coiling portion of being turned round helical spring 4 40 from the openend circumference of first recess 20.
Then, resistive element 3 is adhesively fixed behind insulating properties base station 2, will cover 5 embeddings and be installed on the insulating properties base station 2, thereby the assembling operation of fusing resistor 1 finishes.Be installed on insulating properties base station 2 if will cover 5 like this; Then comprising lead-in wire 31 resistive element 3, the arm 41 of being turned round helical spring 4 and coiling portion 40 etc. becomes the state that quilt cover 5 covers, only go between 32 with arm 42 as the foreign side outstanding (with reference to Fig. 2) of splicing ear to cover 5.
Assemble the fusing resistor 1 that obtains like this, the circuit board 10 that is installed on shown in figure 11 uses.For this fusing resistor 1; When resistive element 3 when flowing through abnormal heatings such as overcurrent; Low melting point scolding tin 7 fusions that the arm of being turned round helical spring 4 41 is engaged with the lead-in wire 31 of resistive element 3, thus arm 41 relies on elastic restoring forces and leaves lead-in wire 31.On its result, resistive element 3 is cut off with the conducting of being turned round helical spring 4, and therefore, the energising that comprises the series circuit of fusing resistor 1 is cut off.
As described above; In the fusing resistor 1 of present embodiment; Because insulating properties base station 2 is provided with at resistive element 3 and is turned round the next door 24 that erects between the coiling portion 40 of helical spring 4; Even bonding agent 6 flows to coiling portion 40 when resistive element 3 being adhesively fixed in insulating properties base station 2, also can utilize next door 24 to stop should flow.And; In the present embodiment; On the inner bottom surface 20a of first recess 20 that is arranged at insulating properties base station 2, carry resistive element 3; Openend circumference with respect to this first recess 20 erects next door 24, and therefore, the bonding agent 6 of not worrying being coated on the openend circumference of first recess 20 can be crossed next door 24 and be attached to and turned round helical spring 4.Therefore, even this fusing resistor 1 under the situation that insulating properties base station 2 is miniaturized, also can be avoided effectively bonding agent 6 to adhere to the action of being turned round helical spring 4 that causes bad.In addition, uprightly on insulating properties base station 2 establish next door 24 and be easy to, therefore, need not also to worry that cost uprises.
In addition; If like this resistive element 3 is equipped on the inner bottom surface 20a of first recess 20; Then can resistive element 3 be equipped on the assigned position (first area S1) of insulating properties base station 2, and bonding agent 6 gets into the internal face of first recess 20 and the gap between the resistive element 3 with stable posture; Therefore, can improve the installation strength of resistive element 3.
And then the next door of insulating properties base station 2 24 is upright is located at the approaching position of resistive element 3 and the coiling portion of being turned round helical spring 4 40, and therefore, even under the situation that insulating properties base station 2 is miniaturized, resistive element 3 can be not opposed with minimum distance with coiling portion 40 yet.Therefore; With regard to this fusing resistor 1; After the abnormal heating because of the resistive element 3 of following overcurrent causes that the arm 41 of being turned round helical spring 4 carries out this energising of elastic return and cuts off action; Element 3 and the unfavorable condition of coiling portion 40 because of the arc discharge short circuit, the raising of reliable in action property are difficult for having a resistance.
In addition; Of present embodiment; If the next door 24 of insulating properties base station 2 is erected to the height and position roughly the same with the upper end position of coiling portion 40; Then the opposed interval of resistive element 3 and coiling portion 40 becomes very big, therefore, has improved and prevents to cut off action back resistive element 3 and the effect of coiling portion 40 because of the unfavorable condition of arc discharge short circuit in energising.
In addition; In the fusing resistor 1 of this execution mode example; On the inner bottom surface 22a of second recess 22 that is arranged at insulating properties base station 2, carry the coiling portion 40 of being turned round helical spring 4, therefore, can coiling portion 40 be equipped on the assigned position (second area S2) of insulating properties base station 2 with stable posture.
In addition; In the fusing resistor 1 of this execution mode example, the leading section of the lead-in wire 31 of resistive element 3 is bent into approximate right angle along the axis direction of the coiling portion 40 of being turned round helical spring 4, under the state that the leading section that makes the arm 41 of being turned round helical spring 4 and this bending part 31a report to the leadship after accomplishing a task; These lead-in wires 31 and molten apply of arm 41 through low melting point scolding tin 7 are engaged; Therefore, when carrying out that this scolding tin is molten to be applied, arm 41 is difficult for producing position deviations with respect to lead-in wire 31.Under this situation,, then more be difficult for producing position deviation if bending part 31a is carried out planarization in advance.If adopt this arm 41 with respect to the lead-in wire 31 difficult structures that produce position deviation, then can make low melting point scolding tin 7 molten applying be stable shape, can be manufactured on the less fusing resistor of the performance upper deviation 1.
In addition, in the above embodiments, though use the overlay film resistor as resistive element 3, resistive element 3 also can be the resistance beyond the overlay film resistor.For example; Also can use wire wound resistor that two ends possess electrode part as resistive element 3; Under this situation; Can constitute: omit lead-in wire 31, turned round an electrode part of arm 41 with the resistive element (wire resistor) of helical spring 4 with the mode that overcomes elastic restoring force through the low-melting-point metal joint.
Claims (5)
1. fusing resistor possesses:
The insulating properties base station that has first area and second area in the one side side;
Use the resistive element of adhesive securement on above-mentioned first area; And
Have from the two ends of coiling portion extended a pair of arm and with above-mentioned coiling portion be equipped on the above-mentioned second area and form turned round helical spring,
Turned round a helical spring above-mentioned arm and under the state of strain, be connected with an end of above-mentioned resistive element above-mentioned via low-melting-point metal; Simultaneously; The lead-in wire that to derive from the other end of above-mentioned resistive element is as the splicing ear of first through hole that connects above-mentioned insulating properties base station; And, with the above-mentioned splicing ear of being turned round helical spring another above-mentioned arm as second through hole that connects above-mentioned insulating properties base station
Above-mentioned fusing resistor is characterised in that,
Above-mentioned one side side at above-mentioned insulating properties base station is provided with the next door that between above-mentioned first area and above-mentioned second area, erects.
2. fusing resistor as claimed in claim 1 is characterized in that,
Above-mentioned one side side at above-mentioned insulating properties base station is provided with first recess that is communicated with and takes in the other end at least of above-mentioned resistive element with above-mentioned first through hole, and above-mentioned first area is present in the inner bottom part of this first recess.
3. fusing resistor as claimed in claim 2 is characterized in that,
Above-mentioned next door erects to the position of the openend circumference that is higher than above-mentioned first recess.
4. like each described fusing resistor in the claim 1～3, it is characterized in that,
Be communicated with and take in second recess of at least a portion of above-mentioned coiling portion with above-mentioned second through hole in the above-mentioned one side side setting of above-mentioned insulating properties base station, above-mentioned second area is present in the inner bottom part of this second recess.
5. like each described fusing resistor in the claim 1～3, it is characterized in that,
End at above-mentioned resistive element is provided with the lead-in wire that front is bent into approximate right angle, is above-mentionedly turned round a helical spring above-mentioned arm and utilizes above-mentioned low-melting-point metal to be engaged in this bending part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011104445A JP5634322B2 (en) | 2011-05-09 | 2011-05-09 | Fuse resistor |
| JP2011-104445 | 2011-05-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102779701A true CN102779701A (en) | 2012-11-14 |
| CN102779701B CN102779701B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210203366.XA Expired - Fee Related CN102779701B (en) | 2011-05-09 | 2012-05-08 | Fusing resistor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5634322B2 (en) |
| CN (1) | CN102779701B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679476A (en) * | 2014-11-05 | 2016-06-15 | 胜德国际研发股份有限公司 | Voltage dependent resistor |
| CN107768194A (en) * | 2016-08-18 | 2018-03-06 | 吉钟镇 | Temperature fuse with elastomer arranged side by side |
| CN113196439A (en) * | 2018-12-20 | 2021-07-30 | 西门子股份公司 | Fuse cutout with integrated measuring function and cutout |
| US11923163B2 (en) | 2019-01-16 | 2024-03-05 | Siemens Aktiengesellschaft | Fuse element and fuse |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170098522A1 (en) * | 2015-10-06 | 2017-04-06 | Ty-Ohm Electronic Works Co., Ltd. | Temperature safety resistor assembly |
| JP2020077523A (en) | 2018-11-07 | 2020-05-21 | デクセリアルズ株式会社 | Protection element |
| JP7173902B2 (en) * | 2019-03-05 | 2022-11-16 | デクセリアルズ株式会社 | protective element |
| JP7256667B2 (en) | 2019-03-28 | 2023-04-12 | デクセリアルズ株式会社 | protective element |
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| JPH072443U (en) * | 1993-06-15 | 1995-01-13 | 日本電気硝子株式会社 | Annealing furnace for glassware |
| JP2004241556A (en) * | 2003-02-05 | 2004-08-26 | Auto Network Gijutsu Kenkyusho:Kk | Cover for mounting component on printed board and method of mounting component on printed board using the cover |
| JP2010034103A (en) * | 2008-07-25 | 2010-02-12 | Panasonic Electric Works Co Ltd | Optically coupled semiconductor relay |
| CN101816058A (en) * | 2007-10-01 | 2010-08-25 | 兴亚株式会社 | Fuse resistor |
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- 2012-05-08 CN CN201210203366.XA patent/CN102779701B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS472443U (en) * | 1971-01-27 | 1972-08-28 | ||
| JPS52129950U (en) * | 1976-03-30 | 1977-10-03 | ||
| JPH072443U (en) * | 1993-06-15 | 1995-01-13 | 日本電気硝子株式会社 | Annealing furnace for glassware |
| JP2004241556A (en) * | 2003-02-05 | 2004-08-26 | Auto Network Gijutsu Kenkyusho:Kk | Cover for mounting component on printed board and method of mounting component on printed board using the cover |
| CN101816058A (en) * | 2007-10-01 | 2010-08-25 | 兴亚株式会社 | Fuse resistor |
| JP2010034103A (en) * | 2008-07-25 | 2010-02-12 | Panasonic Electric Works Co Ltd | Optically coupled semiconductor relay |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679476A (en) * | 2014-11-05 | 2016-06-15 | 胜德国际研发股份有限公司 | Voltage dependent resistor |
| CN107768194A (en) * | 2016-08-18 | 2018-03-06 | 吉钟镇 | Temperature fuse with elastomer arranged side by side |
| CN107768194B (en) * | 2016-08-18 | 2019-07-16 | 吉钟镇 | Temperature fuse with elastomer arranged side by side |
| CN113196439A (en) * | 2018-12-20 | 2021-07-30 | 西门子股份公司 | Fuse cutout with integrated measuring function and cutout |
| US11923163B2 (en) | 2019-01-16 | 2024-03-05 | Siemens Aktiengesellschaft | Fuse element and fuse |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102779701B (en) | 2015-03-25 |
| JP5634322B2 (en) | 2014-12-03 |
| JP2012234774A (en) | 2012-11-29 |
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