CN204011270U - Protective device - Google Patents
Protective device Download PDFInfo
- Publication number
- CN204011270U CN204011270U CN201420191920.1U CN201420191920U CN204011270U CN 204011270 U CN204011270 U CN 204011270U CN 201420191920 U CN201420191920 U CN 201420191920U CN 204011270 U CN204011270 U CN 204011270U
- Authority
- CN
- China
- Prior art keywords
- arm
- joint
- protective device
- resin
- resin base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 84
- 229920005989 resin Polymers 0.000 claims abstract description 141
- 239000011347 resin Substances 0.000 claims abstract description 141
- 230000002159 abnormal effect Effects 0.000 claims abstract description 19
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 4
- MOFOBJHOKRNACT-UHFFFAOYSA-N nickel silver Chemical group [Ni].[Ag] MOFOBJHOKRNACT-UHFFFAOYSA-N 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 description 15
- 238000012423 maintenance Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229920006015 heat resistant resin Polymers 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000008407 joint function Effects 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/04—Bases; Housings; Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2229/00—Manufacturing
- H01H2229/044—Injection moulding
- H01H2229/048—Insertion moulding
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
- Thermistors And Varistors (AREA)
Abstract
The utility model provides a kind of protective device that electric current is larger that keeps; it is made up of resin base, joint, PTC element, bimetallic element, arm, upper plate and resin cover; joint and the state of arm in being electrically connected in the mode of connecting at ordinary times; in the time of bimetallic element work abnormal; joint and arm are in the disconnected state of TURP; on the other hand, joint, PTC element, bimetallic element and the arm state in being electrically connected in the mode of series connection successively.In above-mentioned protective device, the contact portion of at least one party in joint and arm is by being riveted on joint by contact part and arm forms.
Description
Technical field
The utility model relates to a kind of protective device; it,, for example, to electric device or electronic installation (motor, rechargeable battery set) inflow excessive current in the situation that or in the case of electric device or electronic installation or the rising of the excessive temperature around it, is breaking in fact electric current mobile in said apparatus and is made up of bimetallic element and PTC element.
Background technology
Such as producing, to exceedingly inflow current and make electric device reach the situation of abnormal high temperature, reach the situation etc. of abnormal high temperature when abnormal because any reason beyond excessive current makes the temperature of electric device of electric device (motor), need to be breaking at electric current mobile in electric device, root pick need and eliminate above-mentioned abnormal, thereby guarantee the safety of electric device.As the mechanism of cut-out electric current described above and used bimetallic element.
Bimetallic element is made up of bimetallic sheet element, thereby it is configured to the in the situation that of reaching a high temperature itself exceeding specific temperature or makes in the case of the temperature of the environment around it raises bimetallic element to exceed specific temperature reaches a high temperature, carry out work (i.e. distortion) and be breaking at electric current mobile in bimetallic element.
In the situation that bimetallic element as described above is assembled in to electric device, when make electric device reach abnormal high temperature because of excessive current or other reasons, carries out work and cut off electric current.Reduce because the cut-out of electric current makes the temperature of electric device, the temperature of bimetallic element also reduces, and therefore returns to original shape (restoring), consequently, can before guaranteeing the safety of electric device, again allow current flowing.
In order to prevent the above-mentioned current flowing that like that again makes, need to guarantee to maintain bimetallic element and carry out the state of working.To this, in the circuit of electric device, bimetallic element is configured in the mode of series connection, can cut off the electric current of this circuit, and with respect to bimetallic element and configuration PTC element in parallel.By such configuration, in the situation that bimetallic element carries out work, the electric current that makes to flow through this bimetallic element is roundabout to PTC element, utilizes this electric current and makes PTC element produce Joule heat, this heat can be guaranteed to the operating state of bimetallic element to bimetallic element transmission.
So, known have a protective device as described below, and it is configured in circuit the travelling contact that utilizes the work of bimetallic element and move is configured and PTC elements relative is configured in parallel in bimetallic element in the mode of series connection.Such protective device is for example disclosed in following patent documentation 1.In above-mentioned protective device; the resin base with joint forms by have PTC element, bimetallic element and arm in the space of being located at this resin base; the cover that is provided with in advance upper plate is configured in resin base, under this state by resin base and resin cover by adhesive or ultrasonic wave melting and bonded.
Formerly technical literature
Patent documentation
Patent documentation 1: TOHKEMY 2005-203277 communique
Utility model summary
The problem that utility model will solve
In existing protective device as described above, arm and joint have contact portion, these contact portions not and arm and joint form by punch process integratedly.But; so utilize punch process to form the thermal capacitance of contact portion of the protective device of contact portion lower, in the time that larger electric current flows through, under the effect of Joule heat that results from the contact place between arm and joint, make the temperature rise of protective device; bimetallic element work, protective device work., find that such protective device existence cannot increase the such problem of maintenance electric current.
Utility model content
Inventor of the present utility model furthers investigate in order to solve above-mentioned problem, consequently, find at least one party in the contact portion of joint and arm by contact part being riveted on to joint and/or arm forms, thereby can solve above-mentioned problem, to such an extent as to complete the utility model.
According to purport of the present utility model,
[1] the utility model provides a kind of protective device, and it is made up of resin base, joint, PTC element, bimetallic element, arm, upper plate and resin cover, it is characterized in that,
Resin base is shaped by embedding and forms as one with joint,
In the space of resin base, covered lid with the state that stacks gradually PTC element, bimetallic element, arm and upper plate on joint by resin,
The state that joint is electrically connected in the mode of connecting in the contact portion through by both party at ordinary times with arm,
In the time of bimetallic element work abnormal, joint and arm be in the disconnected state of TURP, on the other hand, and joint, PTC element, bimetallic element and the arm state in being electrically connected in the mode of series connection successively,
At least one party in the contact portion of joint and arm is by being riveted on joint by contact part and/or arm forms.
In addition, according to the utility model, in preferred technical scheme, provide following protective device.
[2], according to the protective device above-mentioned [1] Suo Shu, wherein, the two contact portion of joint and arm is by being riveted on joint by contact part and arm forms.
[3] according to the protective device above-mentioned [1] or [2] Suo Shu, wherein, at least a portion of joint has flank.
[4] according to the protective device described in any one in above-mentioned [1] to [3], wherein, resin base is formed by the high resin of mobility.
[5] according to the protective device described in any one in above-mentioned [1] to [4], wherein, upper plate has hook-shaped fastener, by making this fastener engage and upper plate is fixed on to resin base with the engaged part of the kerf of resin base.
[6] according to the protective device described in any one in above-mentioned [1] to [5], wherein, arm has crank shape in the space of resin base.
[7] according to the protective device described in any one in above-mentioned [1] to [6], wherein, the fixed part of arm has crank shape, has fitting portion at the both ends of the end difference of this arm, by making the chimeric and fixed arm of the portion that is fitted of this fitting portion and resin base.
[8] according to the protective device described in any one in above-mentioned [1] to [7], wherein, bimetallic element has projection near portion in the central.
[9] according to the protective device described in any one in above-mentioned [1] to [8], wherein, top panel exposes from the top of resin cover.
[10] according to the protective device described in any one in above-mentioned [1] to [9], wherein, contact part is silver-nickel alloy.
[11] the utility model provides a kind of protective device; it is made up of resin base, joint, PTC element, bimetallic element, arm, upper plate and resin cover; joint and the arm state in being electrically connected in the mode of connecting at ordinary times; in the time of bimetallic element work abnormal; joint and arm be in the disconnected state of TURP, on the other hand, and joint, PTC element, bimetallic element and the arm state in being electrically connected in the mode of series connection successively; it is characterized in that
(1) resin base is shaped by embedding and forms as one with joint,
(2) resin base is formed by the resin with high fluidity,
(3) in the space of resin base, with on joint successively the state of the overlapping PTC of having element, bimetallic element, arm and upper plate covered lid by resin,
(4) contact portions of joint and arm is by contact part being riveted on to joint and arm forms,
(5) at least a portion of joint has flank shape,
(6) upper plate has hook-shaped fastener, by making this fastener engage and be fixed on resin base with the engaged part of the kerf of resin base,
(7) arm has crank shape in the space of resin base,
(8) fixed part of arm has crank shape, has fitting portion at the both ends of the end difference of this arm, by making the chimeric and fixed arm of the portion that is fitted of this fitting portion and resin base,
(9) bimetallic element has projection near portion in the central.
[12], according to the protective device described in any one in above-mentioned [1] to [11], wherein, it is that 5.0mm is following, width is that 3.0mm is below, highly the size below 0.9mm that described protective device has length.
Utility model effect
According to the utility model, in the protective device being made up of resin base, joint, PTC element, bimetallic element, arm, upper plate and resin cover, at least one party in the contact portion of joint and arm is by being riveted on joint by contact part and/or arm forms.Thus, can increase the thermal capacitance of contact portion, even in the case of larger current flowing, also can suppress the sharply heating of contact portion, can increase the maintenance electric current of protective device.
Brief description of the drawings
Fig. 1 is the stereogram that schematically shows protective device 1 of the present utility model.
Fig. 2 be schematically show along with the protective device of Fig. 1 comprise straight line x
1-x
2the cutaway view of the vertical face of plane.
Fig. 3 is shown schematically in the protective device hypothesis of Fig. 1 to be decomposed into the exploded perspective view obtaining in the situation of the key element that forms this protective device.
Fig. 4 is the stereogram that schematically shows the resin base of the protective device of Fig. 1.
Fig. 5 is the stereogram that schematically shows the joint of Fig. 1.
Description of reference numerals is as follows:
1 ... protective device
2 ... joint
4 ... resin base
6 ... resin cover
7 ... a part for resin cover
7 ' ... a part for resin cover
8 ... resin-case
10 ... space
12 ... exposed portions serve
14 ... PTC element
16 ... bimetallic element
18 ... arm
20 ... a part for joint
22 ... a part for arm
24 ... upper plate
26 ... the contact portion of arm
28 ... the contact portion of joint
30 ... the part of joint
32 ... contact
34 ... fixed part
36 ... end difference
38 ... fitting portion
40 ... be fitted portion
42,44 ... contact
46 ... fastener
48 ... engaged part
50 ... stage portion
52 ... contact
54 ... protuberance
56 ... contact
58 ... flank
Embodiment
With reference to accompanying drawing, an execution mode of the present utility model is elaborated.It should be noted that; in Fig. 3, schematically show by the protective device of the present utility model shown in Fig. 1 and Fig. 2 according to forming the key element of this protective device appearance after decomposing; Fig. 3 is shown schematically in being decomposed in protective device 1 hypothesis completion status, of the present utility model the exploded perspective view obtaining in the situation of the key element that forms this protective device 1 as device, should be careful not and obtain this point of protective device of the present utility model by the key element shown in assembly drawing 3.
Protective device 1 of the present utility model roughly has structure such shown in Fig. 1～3.Specifically, protective device 1 is by having the resin base 4 of joint 2 and utilizing the resin-case 8 that resin cover 6 specifies to form.Resin base 4 has space 10, and a part for joint 2 is exposed in its bottom, configures PTC element 14 above this exposed portions serve 12, configures bimetallic element 16 above this PTC element 14, configures arm 18 above this bimetallic element 16.A part 20 for joint and a part 22 for arm run through resin-case 8 and extend to the outside of housing.The space 10 of a part for exposed portions serve 12, PTC element 14, bimetallic element 16 and the arm 18 that comprises joint is airtight by upper plate 24, in addition, in these structures, except a part for joint 2 and arm 18, is covered by resin cover 6.
In protective device 1, joint 2 is electrically connected in the mode of connecting with arm 18 at ordinary times.In addition, bimetallic element 16, in wanting as shown in the figure the case of bending that (arm side) protruded upward, separates with PTC element 14 and arm 18.Under this state, electric current flows with the contact portion 26 of the contact portion 28 of joint 2, joint, arm, the order (or its reverse order) of arm 18, current flowing not in PTC element 14 and bimetallic element 16.When abnormal, produce the situation of overcurrent or produce abnormal heating, bimetallic element 16 is worked, and protrudes from protruding to be upward deformed into down, thus arm 18 is boosted upward, the contact portion 26 of arm is cut off with being electrically connected of contact portion 28 of joint.In addition, the state that the bimetallic element 16 after distortion is electrically connected in contacting with PTC element 14 and arm 18.Under this state, electric current flows with the order (or its reverse order) of joint 2, PTC element 14, bimetallic element 16, arm 18, utilizes this electric current and makes PTC element tripping operation (action), generation Joule heat.Utilize this Joule heat and make bimetallic element 16 remain the state protruding down, can maintain the open state of the contact of arm 18 and joint 2.The electric current now circulating in the circuit that should protect is cut off in fact the pettiness current flowing of leakage current (still, as).
In the utility model, joint 2 is shaped and is formed as one by embedding with resin base 4.By so embedding shaping, can improve the close property between joint 2 and resin base 4.Resin base 4 has space 10, exposes at its bottom place a part that has joint 2.In the exposed portions serve 12 of this joint 2, dispose PTC element 14.Joint 2, in order easily to guarantee being electrically connected between PTC element 14, also can have multiple, for example three for example dome-type contacts 56 (with reference to Fig. 4) in exposed portions serve 12.
Joint 2 has the contact portion 28 relative with the contact portion 26 of arm 18.This contact portion 28 can form by rivet contact part in the hole of running through the correspondence position that is arranged at joint 2.In this manual " riveted joint " refer to, for example, there are other members diameter identical with the diameter in this hole, that there is the thickness thicker than the thickness in this hole (highly) (being for example contact part) running through in the hole that is arranged at a certain member (plate of using for joint) to embed, by crushing and other members will be fixed on to a certain member from this hole along the outstanding part of above-below direction.It should be noted that, it is cylindrical that contact part not necessarily needs, and can be also prismatic etc.By forming such contact portion at joint 2 places; can there is larger thermal capacitance at place of contact portion; even if flow through in protective device thus larger electric current, also can prevent the sharply rising of the temperature of contact portion, can increase the maintenance electric current of protective device.
The metal that forms above-mentioned contact part does not limit especially, and preferably the larger material of thermal capacitance, for example, be preferably silver-nickel, silver-copper, AgCdO, AgSnO
2, AgZnO, AgSnOInO, AgCu, copper-tungsten alloy etc.The shape of, contact portion lower from hardness especially thickness can smallly design, also larger viewpoint of thermal capacitance, be preferably 90% silver medal 10% nickel alloy.
For example as shown in Figure 5, joint 2 is preferably at least a portion of joint and around part 30, has flank 58.In this manual, " flank " refers to key element or the structure of the intensity for improving the member that is provided with this flank, for example enumerate the wire that arranges on member face, bar-shaped or strip reinforcement, make a surperficial part for member be deformed into the structure of convex or concavity.By forming such flank, can improve the rigidity of protective device, especially tackle the intensity from the external pressure of the inside (joint side).
As shown in Figure 2, above-mentioned joint 2 is preferably so that the part 30 that comprises above-mentioned exposed portions serve 12 is positioned at the mode of the position darker than the space of resin base 4 10 is bent to form as crank shape.By being made as such shape, can increase the capacity in the space 10 of resin base 4.In this case, the part 30 of joint also can (side contrary with space 10 sides) be exposed in the inboard of resin base.Expose by the part 30 that makes the first joint like this, can reduce the thickness of protective device, can make in addition the heat that the protective device inside such as contact between the first joint and arm produce dissipate to outside efficiently, can further improve maintenance electric current.
As mentioned above, a part 20 for joint runs through the side of resin-case 8 and extends toward the outer side.A part 20 for this joint is for making protective device 1 of the present utility model and the part that the electric key element of regulation is electrically connected, and realizes joint function originally.As shown in the figure, contact 32 can be set in a part for joint 20.
Preferably, resin base 4 is formed by the higher resin of mobility.By using such resin, in the time embedding shaping, resin spreads all over to thin portion, can carry out finer design.For example, can reduce the thickness of bottom surface and the side of resin base, realize miniaturization.
As the higher resin of above-mentioned mobility, for example enumerate length of flow and be 25mm above, be preferably resin more than 30mm.As above-mentioned resin, do not limit especially, for example enumerate SZ6505HF (Sumitomo Chemical Co) and SZ6506HF (Sumitomo Chemical Co) etc., be preferably SZ6505HF.
Above-mentioned " length of flow " is defined as, using PS10E1ASE (Nissei Plastic Industrial Co., Ltd's system) as injection molding machine, is that 1.5mm, thickness are 0.3mm, the length sluice gate that is 2.0mm and have the length of width as 5.0mm, the product of thickness as the product of 0.3mm at injection molded in 6 seconds taking the pressure of 90MPa via the cast gate of 4.0mm φ and width.
In addition, resin base 4 also can be formed by heat-resistant resin.By using resin as described above, even if in the situation that being placed in the hot environments such as reflow ovens, also can prevent the distortion of protection component.
As above-mentioned heat-resistant resin, enumerating such as LCP resin, polyamide-based resin, PPS is resin etc.
In protective device of the present utility model, above the exposed portions serve 12 of above-mentioned joint, dispose PTC element 14.Consequently, joint 2 is for example electrically connected via contact 56 with PTC element 14.
As above-mentioned PTC element, can use any one in ceramic PTC element or polymer PTC device, but preferably use polymer PTC device.Polymer PTC device is compared with ceramic PTC element, even be also difficult for producing oneself in the lower temperature reaching more than constant of the resistance value of element self, to destroy this respect be favourable.In addition, polymer PTC device, compared with ceramic PTC element, keeps the needed voltage of tripped condition lower, even also can keep tripped condition under the lower state of the voltage of circuit.Consequently, contact can be maintained to open state (lock-out state), can prevent that the chatter phenomenon this respect of the switching of repeatedly carrying out contact from being favourable.In addition, in the situation that keeping current value identical, polymer PTC device is being also preferred than the small-sized low resistance this respect of ceramic PTC element.
Above-mentioned polymer PTC device such as, such as, for example, by comprising the electrode (metal forming) that is dispersed with the PTC key element of the stratiform that conductive composition that the polymer (polyethylene, polyvinylidene fluoride etc.) of conductivity filler (carbon black, nickel alloy etc.) forms obtains and is configured in its both sides and form by extruding.
The size of polymer PTC device and shape do not limit especially, in protective device of the present utility model, for example, can use diameter for the structure that 2.0mm is following, thickness is the plate-like below 0.20mm.
In protective device of the present utility model, in the situation that using polymer PTC device as PTC element, preferably its resistance value is 0.8～10 Ω, more preferably 4.5～10 Ω.More than the resistance value of polymer PTC device is made as to 0.8 Ω, can maintain the state tripping under 3V.In addition, more than the resistance value of polymer PTC device is made as to 4.5 Ω, the leakage current can be by tripped condition under 3V time is made as below 0.2A.In addition, by the resistance value of polymer PTC device is made as below 10 Ω, thereby in the time that it is manufactured, easily reduce the deviation of resistance value.
It should be noted that, in this manual, the resistance value of polymer PTC device refers to, the both sides pressure welding electrode (being preferably nickel foil) of the PTC key element obtaining extruding the conductive composition that comprises polymer, according to the current value of measuring under the state of voltage that applies 6.5mV (direct current) between two electrodes of thus obtained polymer PTC device with 25 DEG C and apply the resistance value that voltage calculates (mensuration based on 4 terminal methods, the measurement range of resistance measurer apply electric current: 100mA).It should be noted that, in the case of the resistance value of electrode is compared with the resistance value of PTC key element, because the resistance value of electrode is little of negligible degree, therefore the resistance value of PTC element equates with the resistance value essence of PTC key element.
In protective device of the present utility model, above PTC element 14, dispose bimetallic element 16.This bimetallic element 16 is bearing in the stage portion 50 of being located in space 10.As long as this bimetallic element 16 can deform at the temperature that should be judged as abnormality, do not limit especially, can use self known structure.At ordinary times, bimetallic element 16 can be electrically connected with PTC element 14 or can not be electrically connected with PTC element 14, but is electrically connected when abnormal.
Bimetallic element 16 is under the prerequisite in space 10 that can allow resin base, and preferred surface is long-pending large as much as possible.By increasing surface area, can reduce the deviation of operating temperature, and increase the power that arm 18 is boosted upward while deforming when abnormal.
Preferably, bimetallic element 16 also can have projection, for example dome-type protuberance 54 near the central portion of its lower surface (PTC component side).This projection is worked at bimetallic element 16 and from the state protruding upward becomes down and to protrude, in the state contacting with PTC element 14.The amount suitable with the height of this projection correspondingly, arm 18 is further boosted upward, even if therefore, in the case of the degree of crook of bimetallic element 16 self is less, also can fully boost arm 18, can cut off being more reliably electrically connected of contact place of arm and joint.
In protective device of the present utility model, arm 18 is positioned at the top of bimetallic element 16, and is fixed on resin base 4.Fixing means does not limit especially, but preferably makes the fixed part 34 of arm 18 be crank shape bending, and fitting portion 38 (being for example protuberance) is set at the both ends of the end difference 36 of this arm 18.In this case, the be fitted portion 40 corresponding with this fitting portion (for example recess for embedding for above-mentioned protuberance) is set in resin base 4.By making these members chimeric (being pressed into), arm 18 can be fixed on to resin base 4.By being made as such form, can make more miniaturization of protective device, maybe can the space of resin base 4 10 be guaranteed extensivelyr, larger bimetallic element can be set.
In addition, arm 18 has contact portion 26, and as shown in the figure, preferably, this contact portion 26 is formed as the state to be positioned at the mode bending of position a little on the lower with respect to horizontal direction (bearing of trend of the bottom surface of resin base).This contact portion 26 contacts with the contact portion 28 of joint when normal, by bimetallic 16 is out of shape, arm 18 is boosted upward, thereby remove this contact condition when abnormal.
The contact portion 28 of above-mentioned contact portion 26 and joint similarly can form by rivet contact part in the hole of correspondence position of being located at arm 18.By form such contact portion on arm 18; become and can possess larger thermal capacitance at place of contact portion; even if flow through in protective device thus larger electric current, also can prevent the sharply rising of the temperature of contact portion, can increase the maintenance electric current of protective device.It should be noted that, the either party in the contact portion 28 of the first joint and the contact portion 26 of arm 18 is by being riveted on the first joint by contact part and/or arm forms, and preferably both sides' contact portion forms by riveted joint contact part.
The metal that forms above-mentioned contact part is identical with the metal of the contact part that is configured for the contact portion 28 that forms joint.
In addition, arm 18 also can have the in the situation that when abnormal, bimetallic element deforming for making arm and being electrically connected of bimetallic element become more reliable contact 42,44.
Preferably, as shown in the figure, it is bending that arm 18 is crank shape ground in space 10.By being made as such shape, while utilizing bimetallic element 16 to boost arm 18 when abnormal, can increase the distance (contact clearance) between contact portion 26 and contact portion 28, thereby can remove reliably both contact conditions.
As mentioned above, a part 22 for arm runs through the side of resin-case 8 and extends toward the outer side.A part 22 for this arm is for by protection component 1 of the present utility model and the part that the electric key element of regulation is electrically connected, and realizes the function identical with joint.As shown in the figure, contact 52 also can be set in a part for arm 22.
In protective device of the present utility model, above the arm in space 10, dispose upper plate 24.Upper plate 24 has following function: reach the high temperature of regulation and when carrying out work and arm 18 being boosted upward at bimetallic element 16, for utilizing the arm 18 from the heat of bimetallic element 16 and in heated condition and/or contact portion 26 contacts and heat is dissipated.Thereby preferably, upper plate 24 has excellent thermal conductivity, heat from upper plate 24 via the arm contacting with upper plate 24 loss via a part 22 for arm.Thereby preferably, upper plate 24 is for example formed by sheet metal.Consequently, can reduce as much as possible the heat transmitting to resin cover 6 from bimetallic element 16, can make to reach Min. because of the impact that heat causes resin cover 6.
As shown in the figure, upper plate 24 is sealed in fact the space 10 being specified by resin base 4.It should be noted that, " in fact sealing " refer to, in the manufacture of protective device of the present utility model, be shaped to form resin cover 6 by embeddings in the situation that, the molten resin using in shaping cannot invade the state in space 10.In other words,, in protective device of the present utility model, in the situation that resin cover 6 having been carried out embed shaping, in being shaped, the resin using can not invade the state in space 10.
Upper plate 24 has fastener 46, and it is by engaging and fix with the engaged part 48 of resin base 4.Preferably, fastener 46 is hook shape (hook shape), and engaged part 48 is kerfs corresponding with it.By being made as such structure, can reduce to engage needed region, consequently, can make more miniaturization or can guarantee space 10 of protective device largelyr, can use larger bimetallic element.
In protective device of the present utility model, configure resin cover 6 to cover the mode of upper plate 24.Resin cover 6 specifies resin-case 8 in the lump with resin base 4.Resin cover 6 for example can pass through adhesive, ultrasonic wave coating, laser cladding etc. with resin base 4 and bonding.
In addition, resin cover 6 also can be put at the assembly that resin base 4, PTC element 14, bimetallic element 16, arm 18 and the upper plate 24 with joint 2 are assembled into as shown in figure the mould of regulation, a part 22 for arm is extended toward the outer side from a side's of mould side, and make state that a part 20 for joint extends toward the outer side from the opposing party's of mould side, by resin is carried out to injection molded, be shaped and be formed on assembly around by embedding.Be shaped and divided the position and this resin that contact to become one to the molten resin of mould supply with the resin portion of resin base 4 by this embedding, the tacky state between resin base 4 and resin cover 6 is guaranteed.In this case, preferably, pressure when preventing the injection molded because of resin cover 6 makes upper plate distortion, before upper plate is fixed on to resin base, in its part, preferably in advance a part 7 for resin cover is embedded and is shaped and is fixed in resin base, next the remainder 7 ' of resin cover is embedded to shaping above near central portion.It should be noted that; the pressure of the resin of supplying with to mould in the time embedding shaping is pressed upper plate 24 towards resin base 4 (being downwards in Fig. 2), therefore can further guarantee the sealing in the space 10 to resin base 4 based on upper plate 24.By formation resin cover 6 like this, can suppress oxygen and invade in space.
In a technical scheme, a part for the upper surface part of upper plate 24 also can be exposed from resin cover 6.By being made as such structure, can make the inside of protective device, the especially heat that contact can be produced dissipate efficiently to device outside, can increase thus maintenance electric current.
In another technical scheme, the upper plate 24 of exposing to the top of device in the above described manner also can be used as electrode.In this case, a part 22 for arm can be omitted.In this case, the electric current circulating in device flows according to the order of the contact portion 26 of the contact portion 28 of joint 2, joint, arm, arm 18, upper plate 24 (or its reverse order) when normal, when abnormal, flows according to the order of joint 2, PTC element 14, bimetallic element 16, arm 18, upper plate 24 (or its reverse order).
The resin that forms resin cover 6 does not limit especially, is preferably the resin same with the resin-phase that forms resin base 4.By using identical resin, can make resin base 4 and the bonding of resin cover 6 become more reliable.
In a preferred embodiment; protective device of the present utility model is made up of resin base, joint, PTC element, bimetallic element, arm, upper plate and resin cover; joint and the state of arm in being electrically connected in the mode of connecting at ordinary times; in the time of bimetallic element work abnormal; joint and arm be in the disconnected state of TURP, on the other hand, and joint, PTC element, bimetallic element and the arm state in being electrically connected in the mode of series connection successively; it is characterized in that
(1) resin base is shaped by embedding and forms as one with joint,
(2) resin base is formed by the resin with high fluidity,
(3) in the space of resin base, with on joint successively the state of the overlapping PTC of having element, bimetallic element, arm and upper plate covered lid by resin,
(4) either party in the contact portion of joint and arm, by contact part and joint and/or arm riveted joint are formed, is preferably both sides all by contact part is riveted and formed with joint and/or arm,
(5) at least a portion of joint has flank,
(6) upper plate has hook-shaped fastener, by making this fastener engage and be fixed on resin base with the engaged part of the kerf of resin base,
(7) arm has crank shape in the space of resin base,
(8) fixed part of arm has crank shape, has fitting portion at the both ends of the end difference of this arm, by making the chimeric and fixed arm of the portion that is fitted of this fitting portion and resin base,
(9) bimetallic element has projection near portion in the central.
Wherein, as long as possess at least one in above-mentioned feature (5)～(9), but preferably possess any two, more preferably possess any three, further preferably possess all.
Protective device of the present utility model can be realized miniaturization, for example can be set to long for 5.0mm following, wide for 3.0mm is following, highly be the size below 0.9mm, can be made as typically long for 4.6mm, wide for 2.8mm, be highly the size of 0.88mm.
Industrial applicibility
Protective device of the present utility model can desirable lithium-ions battery-battery cell as mobile phone, flat-panel devices etc. protective device.
Claims (14)
1. a protective device, this protective device is made up of resin base, joint, PTC element, bimetallic element, arm, upper plate and resin cover, it is characterized in that,
Resin base is shaped by embedding and forms as one with joint,
In the space of resin base, with on joint successively the state of the overlapping PTC of having element, bimetallic element, arm and upper plate covered lid by resin,
The state that joint is electrically connected in the mode of connecting in the contact portion through by both party at ordinary times with arm,
In the time of bimetallic element work abnormal, joint and arm be in the disconnected state of TURP, on the other hand, and joint, PTC element, bimetallic element and the arm state in being electrically connected in the mode of series connection successively,
At least one party in the contact portion of joint and arm is by being riveted on joint by contact part and/or arm forms.
2. protective device according to claim 1, wherein,
The two contact portion of joint and arm is by being riveted on joint by contact part and arm forms.
3. protective device according to claim 1 and 2, wherein,
At least a portion of joint has flank.
4. protective device according to claim 1 and 2, wherein,
Resin base is formed by the high resin of mobility.
5. protective device according to claim 1 and 2, wherein,
Upper plate has hook-shaped fastener, by making this fastener engage and upper plate is fixed on to resin base with the engaged part of the kerf of resin base.
6. protective device according to claim 1 and 2, wherein,
Arm has crank shape in the space of resin base.
7. protective device according to claim 1 and 2, wherein,
The fixed part of arm has crank shape, has fitting portion at the both ends of the end difference of this arm, by making the chimeric and fixed arm of the portion that is fitted of this fitting portion and resin base.
8. protective device according to claim 1 and 2, wherein,
Bimetallic element has projection near portion in the central.
9. protective device according to claim 1 and 2, wherein,
Top panel exposes from the top of resin cover.
10. protective device according to claim 1 and 2, wherein,
Contact part is silver-nickel alloy.
11. protective devices according to claim 1 and 2, wherein,
It is that 5.0mm is following, width is that 3.0mm is below, highly the size below 0.9mm that described protective device has length.
12. 1 kinds of protective devices; it is made up of resin base, joint, PTC element, bimetallic element, arm, upper plate and resin cover; joint and the arm state in being electrically connected in the mode of connecting at ordinary times; in the time of bimetallic element work abnormal; joint and arm be in the disconnected state of TURP, on the other hand, and joint, PTC element, bimetallic element and the arm state in being electrically connected in the mode of series connection successively; it is characterized in that
(1) resin base is shaped by embedding and forms as one with joint,
(2) resin base is formed by the resin with high fluidity,
(3) in the space of resin base, with on joint successively the state of the overlapping PTC of having element, bimetallic element, arm and upper plate covered lid by resin,
(4) contact portions of joint and arm is by contact part being riveted on to joint and arm forms,
(5) at least a portion of joint has flank shape,
(6) upper plate has hook-shaped fastener, by making this fastener engage and be fixed on resin base with the engaged part of the kerf of resin base,
(7) arm has crank shape in the space of resin base,
(8) fixed part of arm has crank shape, has fitting portion at the both ends of the end difference of this arm, by making the chimeric and fixed arm of the portion that is fitted of this fitting portion and resin base,
(9) bimetallic element has projection near portion in the central.
13. protective devices according to claim 12, wherein,
The resin with high fluidity is that length of flow is resin more than 25mm.
14. protective devices according to claim 13, wherein,
It is that 5.0mm is following, width is that 3.0mm is below, highly the size below 0.9mm that described protective device has length.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-002259 | 2013-04-19 | ||
| JP2013002259U JP3185917U (en) | 2013-04-19 | 2013-04-19 | Protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204011270U true CN204011270U (en) | 2014-12-10 |
Family
ID=50429632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420191920.1U Expired - Lifetime CN204011270U (en) | 2013-04-19 | 2014-04-18 | Protective device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3185917U (en) |
| KR (1) | KR200487774Y1 (en) |
| CN (1) | CN204011270U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107210159A (en) * | 2015-02-04 | 2017-09-26 | 打矢恒温器株式会社 | Thermal protector |
| CN111615737A (en) * | 2018-02-27 | 2020-09-01 | 柏恩氏株式会社 | Circuit breaker and safety circuit with same |
| CN113921333A (en) * | 2021-10-28 | 2022-01-11 | 江苏常胜电器股份有限公司 | Wide temperature range self-sustaining formula protector |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2015156136A1 (en) * | 2014-04-09 | 2017-04-13 | Ｌｉｔｔｅｌｆｕｓｅジャパン合同会社 | Protective device |
| CN105336552A (en) * | 2014-08-08 | 2016-02-17 | 上海神沃电子有限公司 | Circuit protector and production method thereof |
| CN108766833A (en) * | 2018-07-11 | 2018-11-06 | 贵州航天电器股份有限公司 | A kind of structure improving temperature relay vibration resistance |
| CN113572128A (en) * | 2021-08-11 | 2021-10-29 | 上海维安电子有限公司 | Over-temperature and over-current integrated protection element |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0664979B2 (en) * | 1988-05-13 | 1994-08-22 | ウチヤ・サーモスタット株式会社 | Thermostat manufacturing method |
| CN1428806A (en) * | 2001-12-07 | 2003-07-09 | 古河电气工业株式会社 | Thermal protector |
| JP4170232B2 (en) | 2004-01-16 | 2008-10-22 | 株式会社小松ライト製作所 | Safety device using bimetal |
| KR100656504B1 (en) * | 2005-06-09 | 2006-12-11 | 센서스앤드컨트롤스코리아 주식회사 | Circuit breaker and battery pack with the same |
-
2013
- 2013-04-19 JP JP2013002259U patent/JP3185917U/en not_active Expired - Lifetime
-
2014
- 2014-04-18 KR KR2020140003122U patent/KR200487774Y1/en active IP Right Grant
- 2014-04-18 CN CN201420191920.1U patent/CN204011270U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107210159A (en) * | 2015-02-04 | 2017-09-26 | 打矢恒温器株式会社 | Thermal protector |
| CN107210159B (en) * | 2015-02-04 | 2020-01-14 | 打矢恒温器株式会社 | Thermal protector |
| CN111615737A (en) * | 2018-02-27 | 2020-09-01 | 柏恩氏株式会社 | Circuit breaker and safety circuit with same |
| CN111615737B (en) * | 2018-02-27 | 2022-05-10 | 柏恩氏株式会社 | Circuit breaker and safety circuit with same |
| CN113921333A (en) * | 2021-10-28 | 2022-01-11 | 江苏常胜电器股份有限公司 | Wide temperature range self-sustaining formula protector |
Also Published As
| Publication number | Publication date |
|---|---|
| KR200487774Y1 (en) | 2019-01-14 |
| JP3185917U (en) | 2013-09-12 |
| KR20140005595U (en) | 2014-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180109 Address after: Tokyo, Japan Patentee after: TYCO ELECTRONICS JAPAN G.K. Address before: Kanagawa County, Japan Patentee before: TYCO ELECTRONICS JAPAN G.K. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141210 |
|
| CX01 | Expiry of patent term |