CN218274500U - Thermal fuse and electrical equipment - Google Patents
Thermal fuse and electrical equipment Download PDFInfo
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- CN218274500U CN218274500U CN202222068391.3U CN202222068391U CN218274500U CN 218274500 U CN218274500 U CN 218274500U CN 202222068391 U CN202222068391 U CN 202222068391U CN 218274500 U CN218274500 U CN 218274500U
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Abstract
The utility model discloses a thermal fuse and electrical equipment, wherein the thermal fuse comprises a conductive shell, a first lead, a second lead, a conductive piece, a breaking spring, a thermosensitive piece and an elastic piece, wherein the first lead extends into an installation cavity in the conductive shell through an opening; when the conductive piece abutted with the conductive shell is abutted with the first lead, the first lead is electrically conducted with the second lead arranged on the outer surface of the conductive shell; two ends of the breaking spring are respectively elastically abutted with the conductive piece and one end of the installation cavity, which is provided with the opening; the heat-sensitive piece is arranged at one end of the mounting cavity far away from the opening; two ends of the elastic piece are respectively elastically abutted against the thermosensitive piece and the conductive piece so as to tightly prop the conductive piece against one end of the first lead extending into the mounting cavity; the end face of the elastic piece facing the conductive piece is a first end face, and the outer peripheral edge of the first end face is in abutting fit with the outer peripheral edge of the end face of the conductive piece facing the elastic piece. The utility model discloses technical scheme aims at solving the electrically conductive skew that leads to of drum spring and the problem that causes.
Description
Technical Field
The utility model relates to a hot fuse technical field, in particular to hot fuse-link and electrical equipment.
Background
The thermal fuse link can break the circuit by fusing the thermal sensitive piece inside the thermal fuse link when the environmental temperature exceeds the upper temperature protection limit, thereby protecting the electrical equipment. In the related art, a conductive member electrically connected to the conductive housing is disposed in the conductive housing of the thermal fuse, a breaking spring and a first wire electrically connected to the conductive member are disposed on one side of the conductive member, and a drum spring and a thermal sensitive member are disposed on the other side of the conductive member. When the heat-sensitive element is not fused, the drum-shaped spring tightly supports the conductive element on the first wire, so that the circuit conduction of the heat fuse link is realized. When the heat-sensitive element is fused, the breaking spring is released to cause the first lead to be broken and contacted with the conductive element, so that the circuit breaking of the heat fusing body is realized.
The outer diameter of the drum-shaped spring is reduced from the middle part to the two ends in sequence, and the drum-shaped spring has the characteristics of durability and low cost. In the process of assembling the thermal fuse, the drum-shaped spring is installed in the installation cavity, and then the conductive piece is installed in the installation cavity. The middle part of the drum-shaped spring is abutted against the inner side wall of the installation cavity, and the two ends of the drum-shaped spring are separated from the inner side wall of the installation cavity. The conductive piece is usually a sheet-shaped contact piece structure, and the outer periphery of the contact piece structure is in butt connection with the inner side wall of the mounting cavity. In the process of installing the conductive piece into the installation cavity, the conductive piece can extrude the drum-shaped spring inwards, and because the end face of the conductive piece facing the drum-shaped spring is larger than the end face of the drum-shaped spring facing the conductive piece, and one end of the drum-shaped spring facing the conductive piece is in a conical structure, the phenomenon of point-surface contact between the drum-shaped spring and the conductive piece is caused, so that the conductive piece can be skewed relative to the direction of the cross section of the installation cavity when the conductive piece extrudes the drum-shaped spring and the end face of the drum-shaped spring facing the conductive piece is not abutted to the center of the end face of the conductive piece facing the drum-shaped spring. The unable electrically conductive piece that keeps parallel with the direction of installation cavity cross section can take place contact failure phenomenon with first wire, and contact failure's thermal link can produce the high resistance, can pile up a large amount of heats when the circular telegram, leads to the thermal link to break off the circuit in advance when ambient temperature does not exceed the temperature protection upper limit. Meanwhile, electric arcs can be generated between the first lead wire with poor contact and the conductive piece to cause welding between contacts, and when the heat-sensitive piece is fused, the first lead wire and the conductive piece cannot be separated by the circuit breaking spring due to welding between the contacts, so that the circuit of the heat fuse cannot be interrupted, and the electrical equipment cannot be protected.
SUMMERY OF THE UTILITY MODEL
The present invention provides a thermal fuse, which aims to solve the problem of the deflection of the conductive piece caused by the drum spring and the problem caused by the deflection.
In order to achieve the above object, the present invention provides a thermal fuse, including:
the electric connector comprises a conductive shell, a connecting piece and a connecting piece, wherein a mounting cavity is formed inside the conductive shell, and an opening is formed at one end of the mounting cavity;
the first lead extends into the installation cavity through the opening, and the side wall of the first lead is in insulated connection with the cavity wall of the installation cavity;
the second lead is connected to the outer surface of one end of the conductive shell, which is far away from the opening;
the conductive piece is arranged in the mounting cavity and abutted against the conductive shell, and the first lead is slidably arranged so as to be electrically conducted with the second lead when abutted against one end of the first lead extending into the mounting cavity;
the circuit breaking spring is positioned between the conductive piece and the opening, and two ends of the circuit breaking spring are elastically abutted with the conductive piece and one end of the mounting cavity, which is provided with the opening, respectively;
the heat-sensitive piece is arranged at one end of the mounting cavity, which is far away from the opening; and
the elastic piece is positioned between the heat-sensitive piece and the conductive piece, and two ends of the elastic piece are respectively and elastically abutted against the heat-sensitive piece and the conductive piece so as to tightly prop the conductive piece against one end of the first lead extending into the mounting cavity;
the end face of the elastic piece facing the conductive piece is a first end face, and the outer periphery of the first end face is in abutting fit with the outer periphery of the end face of the conductive piece facing the elastic piece.
In an embodiment of the present invention, an end surface of the elastic member facing the heat sensitive member is a second end surface, and the first end surface and the second end surface are arranged in parallel;
the outer periphery of the second end face is in abutting fit with the outer periphery of the end face, facing the elastic piece, of the thermosensitive piece.
In an embodiment of the present invention, an outer peripheral wall of one end of the elastic member facing the conductive member is fitted with an inner side wall of the installation cavity;
the elastic component faces the peripheral wall of one end of the heat-sensitive component and is matched with the inner side wall of the installation cavity.
In an embodiment of the present invention, the first end surface is provided with a heat conduction hole, and the heat conduction hole is communicated with the second end surface.
In an embodiment of the present invention, the elastic member is a spring, and the cross sections of the points on the spring in the axial direction have the same size.
In an embodiment of the present invention, the thermal fuse link further includes a first gasket and a second gasket, the first gasket is located between the elastic member and the conductive member, and the second gasket is located between the elastic member and the heat sensitive member.
In an embodiment of the present invention, the first gasket and the second gasket are made of metal.
In an embodiment of the present invention, the thermal fuse link further includes an insulating sleeve, the insulating sleeve is disposed through the opening, and with the opening interference fit to seal the opening, the first wire is disposed through the insulating sleeve to stretch into the installation cavity, the circuit breaking spring deviates from the one end of the conductive piece with the insulating sleeve elasticity butt, the insulating sleeve is used for preventing the first wire with the conductive shell contacts the circular telegram.
In an embodiment of the present invention, the conductive member faces the opening, and a sinking platform is formed in the one side of the opening in an inward concave manner, the outer side wall of the conductive member is slidably connected to the side wall of the mounting cavity, and the bottom wall of the sinking platform can be respectively connected to the first wire and the circuit breaking spring.
The utility model also provides an electrical equipment, including the thermal link, the thermal link includes:
the conductive shell is internally provided with a mounting cavity, and one end of the mounting cavity is provided with an opening;
the first lead extends into the installation cavity through the opening, and the side wall of the first lead is in insulated connection with the cavity wall of the installation cavity;
the second lead is connected to the outer surface of one end of the conductive shell, which is far away from the opening;
the conductive piece is arranged in the mounting cavity and abutted against the conductive shell, and the first lead is slidably arranged so as to be electrically conducted with the second lead when abutted against one end of the first lead extending into the mounting cavity;
the circuit breaking spring is positioned between the conductive piece and the opening, and two ends of the circuit breaking spring are respectively elastically abutted with the conductive piece and one end of the installation cavity, which is provided with the opening;
the heat-sensitive piece is arranged at one end of the mounting cavity, which is far away from the opening; and
the elastic piece is positioned between the heat-sensitive piece and the conductive piece, and two ends of the elastic piece are respectively and elastically abutted against the heat-sensitive piece and the conductive piece so as to tightly push the conductive piece against one end of the first lead extending into the mounting cavity;
the end face of the elastic piece facing the conductive piece is a first end face, and the outer periphery of the first end face is in abutting fit with the outer periphery of the end face of the conductive piece facing the elastic piece.
The utility model discloses be provided with the elastic component between the electrically conductive piece of technical scheme hot link and the heat-sensitive component, the elastic component is first terminal surface towards the terminal surface that electrically conducts, and the outer peripheral edges of first terminal surface and the outer peripheral edges of electrically conductive piece towards the terminal surface of elastic component support the cooperation. When assembling the thermal fuse, the conductive piece compresses the elastic piece in the installation cavity, and the outer periphery of one end surface of the conductive piece is matched with the outer periphery of the first end surface in an abutting mode. The utility model discloses the elastic component of scheme and the design of face-to-face contact between the electrically conductive piece, the drum-shaped spring of having replaced current scheme and the design of point-to-face contact between the electrically conductive piece to make electrically conductive piece can remain parallel with the direction of installation cavity cross section all the time in the installation, avoid because of electrically conductive crooked thermal link contact failure that causes problem that causes, the thermal link after the guarantee equipment has good continuity, the electrically conductive crooked and the problem that causes of the drum-shaped spring that has solved leads to.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a thermal fuse according to the present invention before being fused;
fig. 2 is a schematic structural diagram of an embodiment of the thermal fuse according to the present invention after fusing.
The reference numbers illustrate:
the realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, back, 8230; \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "secured" are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides a thermal fuse link 100, including:
the electronic device comprises a conductive shell 10, wherein an installation cavity 11 is formed inside the conductive shell 10, and an opening 111 is formed at one end of the installation cavity 11;
a first lead 20, wherein the first lead 20 extends into the installation cavity 11 through the opening 111, and the side wall of the first lead 20 is connected with the wall of the installation cavity 11 in an insulated manner;
a second lead 30, wherein the second lead 30 is connected to the outer surface of the end of the conductive shell 10 facing away from the opening 111;
the conductive piece 40 is arranged in the installation cavity 11 and is abutted against the conductive shell 10, and the first lead wire 20 is slidably arranged so as to enable the first lead wire 20 and the second lead wire 30 to be electrically conducted when the conductive piece 40 is abutted against one end of the first lead wire 20 extending into the installation cavity 11;
a breaking spring 50, wherein the breaking spring 50 is positioned between the conductive member 40 and the opening 111, and two ends of the breaking spring 50 are respectively elastically abutted against the conductive member 40 and one end of the mounting cavity 11, which is provided with the opening 111;
the heat-sensitive piece 60 is arranged at one end of the mounting cavity 11 far away from the opening 111; and
the elastic element 70, the elastic element 70 is located between the heat-sensitive element 60 and the conductive element 40, and two ends of the elastic element 70 are respectively elastically abutted against the heat-sensitive element 60 and the conductive element 40, so as to tightly press the conductive element 40 against one end of the first lead 20 extending into the mounting cavity 11;
the end surface of the elastic element 70 facing the conductive element 40 is a first end surface 71, and the outer periphery of the first end surface 71 is in abutting fit with the outer periphery of the end surface of the conductive element 40 facing the elastic element 70.
The utility model discloses technical scheme thermal link 100 is provided with elastic component 70 between electrically conductive 40 and the temperature sensing piece 60, and elastic component 70 is first terminal surface 71 towards the terminal surface of electrically conductive 40, and the outer peripheral edges of first terminal surface 71 and electrically conductive 40 support the cooperation of propping up towards the outer peripheral edges of the terminal surface of elastic component 70. When the thermal fuse-link 100 is assembled, the conductive member 40 compresses the elastic member toward the mounting cavity 11, since the outer periphery of one end surface of the conductive member 40 is in abutting engagement with the outer periphery of the first end surface 71. The utility model discloses the face-to-face contact design between elastic component 70 and the electrically conductive piece 40 of scheme, the point-to-face contact design between the drum spring of having replaced current scheme and the electrically conductive piece 40, so that electrically conductive piece 40 can remain parallel with the direction of installation cavity 11 cross section throughout in the installation, avoid because of the crooked problem that causes thermal link 100 contact failure and cause of electrically conductive piece 40, thermal link 100 after the guarantee equipment has good conductivity, the crooked and problem that causes of electrically conductive piece 40 that the drum spring leads to has been solved.
When the thermal fuse link 100 is assembled, the current passes through the first wire 20, the conductive member 40, the conductive housing 10 and the second wire 30 in sequence to achieve electrical conduction. Wherein the end of the thermal fuse link 100 where the first wire 20 is provided is disposed toward the heat source. In order to prevent the first conductive wire 20 from being electrically connected to the conductive housing 10 after the conductive member 40 is separated from the first conductive wire 20, so that the circuit cannot be broken, an insulating material is disposed between the first conductive wire 20 and the housing to insulate and connect the two.
The conductive shell 10 may be made of copper or other metal materials with good conductivity, and the material of the conductive shell 10 is not limited herein; the conductive member 40 may be made of silver or other metal material with good conductivity, and the material of the conductive member 40 is not limited herein. The thermosensitive member 60 is made of an organic chemical substance, and serves as thermosensitive particles of the thermosensitive element, which can ensure sensitivity to a preset temperature, can be rapidly fused when reaching the preset temperature, and protects the circuit, without limitation on the kind and composition of the thermosensitive particles.
When the heat sensitive element 60 is fused, the breaking spring 50 in a compressed state can spring the conductive element 40, so that the first conductive wire 20 is separated from the conductive element 40 to break a circuit, thereby performing a power-off protection function. The outer peripheral surface of the conductive member 40 is in abutting fit with the outer peripheral surface of the first end surface 71, so that surface-to-surface contact between the conductive member 40 and the elastic member 70 is realized, the conductive member 40 can be prevented from being stuck in the mounting cavity 11, and the stability of the internal structure of the thermal fuse 100 in the assembling process is improved.
Referring to fig. 1 and 2, in an embodiment of the present invention, an end surface of the elastic member 70 facing the heat sensitive member 60 is a second end surface 72, and the first end surface 71 is disposed parallel to the second end surface 72;
the outer periphery of the second end surface 72 is in abutting fit with the outer periphery of the end surface of the heat sensitive member 60 facing the elastic member 70.
The utility model provides an among the technical scheme of an embodiment, the cooperation is supported to the outer peripheral edge of second terminal surface 72 and the outer peripheral edge of the terminal surface of heat-sensitive piece 60, and first terminal surface 71 and second terminal surface 72 parallel arrangement, the face-to-face contact between second terminal surface 72 and heat-sensitive piece 60 has been realized, parallel arrangement's first terminal surface 71 and second terminal surface 72 simultaneously, at relative movement's in-process, because the atress is balanced, also keep parallel movement, the electrically conductive 40 that supports with first terminal surface 71 also keeps parallel movement, avoid the card to die in installation cavity 11, the stability of the internal structure of thermal fuse-link 100 has been improved.
Referring to fig. 1 and 2, in an embodiment of the present invention, an outer peripheral wall of an end of the elastic member 70 facing the conductive member 40 is fitted to an inner side wall of the mounting cavity 11;
the outer peripheral wall of the elastic member 70 facing the end of the heat sensitive member 60 is fitted to the inner side wall of the mounting cavity 11.
The utility model relates to an among the technical scheme of an embodiment, the outer peripheral wall at elastic component 70 both ends and the interior lateral wall adaptation of installation cavity 11 can avoid elastic component 70 volume undersize, take place to rock in installation cavity 11, lead to unable stable support electrically conductive 40. The two ends of the elastic member 70, which are maintained to be fitted to the inner side walls of the installation cavity 11, improve the stability of the internal structure of the thermal fuse link 100.
Referring to fig. 1 and 2, in an embodiment of the present invention, the first end surface 71 is provided with a heat conduction hole, and the heat conduction hole penetrates through to the second end surface 72.
The utility model provides an among the technical scheme of an embodiment, because the one end that thermal link 100 was equipped with first wire 20 sets up towards the heat source, and the elastic component 70 that is located between heat-sensitive piece 60 and the electrically conductive piece 40 does not have better heat conductivity, so seted up the heat conduction hole so that heat conduction, the setting of heat conduction hole can improve the response speed of thermal link 100 when ambient temperature surpasss the temperature protection upper limit.
Referring to fig. 1 and 2, in an embodiment of the present invention, the elastic member 70 is a spring, and the cross-sections of the points along the axial direction of the spring have the same size.
The utility model discloses an among the technical scheme of an embodiment, compare in the drum spring middle part big, the little shape in both ends, the utility model discloses a size of the cross section of each point on the spring axis is all the same, makes the outer peripheral face of the first terminal surface 71 of spring and the outer peripheral face of electrically conductive 40 fully contact, the outer peripheral face of the first terminal surface 71 of spring and the inboard wall adaptation of installation cavity 11 simultaneously, the utility model discloses a setting of drum spring is replaced to the spring, has improved the stability of thermal link 100 structure.
Referring to fig. 1 and 2, in an embodiment of the present invention, the thermal fuse link 100 further includes a first spacer 91 and a second spacer 92, the first spacer 91 is located between the elastic member 70 and the conductive member 40, and the second spacer 92 is located between the elastic member 70 and the heat sensitive member 60.
The utility model provides an among the technical scheme of an embodiment, when elastic component 70 is the spring, two terminal surfaces of spring are the steel wire structure, lead to the spring respectively with the area of contact undersize of electrically conductive piece 40 and heat-sensitive piece 60, make the spring respectively more even with the atress of electrically conductive piece 40 and heat-sensitive piece 60 in order to increase area of contact, be equipped with first gasket 91 between spring and electrically conductive piece 40, and be equipped with second gasket 92 between spring and heat-sensitive piece 60, first gasket 91 and second gasket 92 set up the stability that has improved the internal structure of thermal link 100.
Referring to fig. 1 and 2, in an embodiment of the present invention, the first gasket 91 and the second gasket 92 are made of metal.
The utility model discloses an among the technical scheme of an embodiment, the metal material has good heat conductivity, and first gasket 91 and second gasket 92 can be the copper sheet, also can be the aluminum sheet, can also be other metal materials, do not make the injecing to the metal material that first gasket 91 and second gasket 92 chooseed for use here.
Referring to fig. 1 and 2, in an embodiment of the present invention, the thermal fuse link 100 further includes an insulating sleeve 80, the insulating sleeve 80 is disposed through the opening 111, and is in interference fit with the opening 111 to seal the opening 111, the first wire 20 is disposed through the insulating sleeve 80 to extend into the installation cavity 11, the circuit breaking spring 50 is deviated from one end of the conductive piece 40 and is elastically abutted against the insulating sleeve 80, and the insulating sleeve 80 is used for preventing the first wire 20 and the conductive shell 10 from being electrically connected.
The utility model discloses an among the technical scheme of an embodiment, the setting of insulating sleeve 80 can prevent that first wire 20 and conductive housing 10 butt and electricity from switching on, still can't open the circuit when leading to conductive piece 40 and the separation of first wire 20. The part of the insulating sleeve 80 located outside the conductive housing 10 is further covered with a sealant layer 81, the sealant layer 81 is used for sealing the opening 111, and simultaneously, the first wire 20 and the insulating sleeve 80 are fixedly connected, and the arrangement of the insulating sleeve 80 improves the structural stability of the thermal fuse 100.
The material of the insulating sleeve 80 may be insulating ceramic, or may be other insulating materials, and the material of the insulating sleeve 80 is not limited herein. The material of the sealant layer may be epoxy resin or other colloid, and the material of the sealant layer is not limited herein.
Referring to fig. 1 and 2, in an embodiment of the present invention, a sinking platform (not labeled) is formed by the conductive member 40 being recessed inward toward one side of the opening 111, an outer sidewall of the conductive member 40 is slidably connected to a sidewall of the mounting cavity 11, and a bottom wall of the sinking platform can abut against the first lead 20 and the circuit breaking spring 50, respectively.
The utility model provides an among the technical scheme of an embodiment, the lateral wall of heavy platform and the inside wall sliding connection of installation cavity 11, when electrically conductive 40 tends to crooked, the lateral wall of heavy platform can support the inside wall that withstands installation cavity 11 to prevent that electrically conductive 40 from taking place crooked. The structure of the sinking platform can prevent the conductive piece 40 from being stuck in the installation cavity 11 due to deflection, and meanwhile, the arrangement of the sinking platform can enable the conductive piece 40 to be more smoothly connected with the installation cavity 11 in a sliding manner, so that the stability of the internal structure of the thermal fuse link 100 is improved.
Referring to fig. 1 and fig. 2, the present invention further provides an electrical apparatus (not shown), the electrical apparatus includes a thermal fuse 100, the specific structure of the thermal fuse 100 refers to the above-mentioned embodiments, and since the electrical apparatus adopts all the technical solutions of all the above-mentioned embodiments, all the beneficial effects brought by the technical solutions of the above-mentioned embodiments are at least achieved, and are not repeated herein.
The thermal fuse 100 may fuse the thermal sensitive element 60 therein to interrupt a circuit when an ambient temperature exceeds an upper temperature protection limit, thereby protecting an electrical device.
The electric appliances comprise small household appliances such as coffee machines, electric kettles, electric cookers, bread makers, soybean milk makers, irons, hair dryers and the like;
the electrical equipment also comprises large household appliances such as air conditioners, refrigerators, washing machines, fan heaters, gas water heaters, dish washers and the like;
the electrical equipment also comprises office equipment such as a copying machine, a laser printer, a fax machine, a lightning protection extension socket and the like;
the electrical equipment also comprises battery equipment such as unmanned aerial vehicle battery packs, chargers and the like;
electrical equipment also includes equipment such as various power sources, transformers, adapters, and inverters.
The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the inventive concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A thermal fuse link, comprising:
the electric connector comprises a conductive shell, a connecting piece and a connecting piece, wherein a mounting cavity is formed inside the conductive shell, and an opening is formed at one end of the mounting cavity;
the first lead extends into the installation cavity through the opening, and the side wall of the first lead is in insulated connection with the cavity wall of the installation cavity;
the second lead is connected to the outer surface of one end of the conductive shell, which faces away from the opening;
the conductive piece is arranged in the mounting cavity and is abutted against the conductive shell, and the first lead is slidably arranged so as to be electrically conducted with the second lead when being abutted against one end of the first lead extending into the mounting cavity;
the circuit breaking spring is positioned between the conductive piece and the opening, and two ends of the circuit breaking spring are respectively elastically abutted with the conductive piece and one end of the installation cavity, which is provided with the opening;
the heat-sensitive piece is arranged at one end of the mounting cavity, which is far away from the opening; and
the elastic piece is positioned between the heat-sensitive piece and the conductive piece, and two ends of the elastic piece are respectively and elastically abutted against the heat-sensitive piece and the conductive piece so as to tightly push the conductive piece against one end of the first lead extending into the mounting cavity;
the end face of the elastic piece facing the conductive piece is a first end face, and the outer periphery of the first end face is in abutting fit with the outer periphery of the end face of the conductive piece facing the elastic piece.
2. The thermal fuse link according to claim 1, wherein an end surface of the elastic member facing the thermosensitive member is a second end surface, and the first end surface is disposed in parallel with the second end surface;
the outer periphery of the second end face is in abutting fit with the outer periphery of the end face, facing the elastic piece, of the thermosensitive piece.
3. The thermal fuse link according to claim 2, wherein an outer peripheral wall of an end of the elastic member facing the conductive member is fitted to an inner side wall of the mounting cavity;
the elastic part faces the outer peripheral wall of one end of the heat-sensitive part and is matched with the inner side wall of the installation cavity.
4. The thermal fuse link according to claim 3, wherein the first end face is provided with a heat conduction hole penetrating to the second end face.
5. The thermal fuse link according to claim 4, wherein the elastic member is a spring, and cross-sections of points in an axial direction of the spring are equal in size.
6. The thermal fuse link of claim 5, further comprising a first spacer and a second spacer, the first spacer being positioned between the resilient member and the electrically conductive member, the second spacer being positioned between the resilient member and the thermally sensitive member.
7. The thermal fuse link of claim 6, wherein the first and second shims are metal.
8. The thermal fuse according to any one of claims 1 to 7, further comprising an insulating sleeve, wherein the insulating sleeve is disposed through the opening and is in interference fit with the opening to close the opening, the first conductive wire is disposed through the insulating sleeve to extend into the mounting cavity, an end of the trip spring facing away from the conductive member is elastically abutted against the insulating sleeve, and the insulating sleeve is configured to prevent the first conductive wire from contacting the conductive housing and being energized.
9. The thermal fuse link according to claim 8, wherein a conductive member is recessed inwardly toward a side of said opening to form a platform, an outer side wall of said conductive member is slidably connected to a side wall of said mounting cavity, and a bottom wall of said platform is abutted against said first lead and said breaking spring, respectively.
10. Electrical equipment, characterized in that it comprises a thermal fuse-link according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222068391.3U CN218274500U (en) | 2022-08-05 | 2022-08-05 | Thermal fuse and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222068391.3U CN218274500U (en) | 2022-08-05 | 2022-08-05 | Thermal fuse and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218274500U true CN218274500U (en) | 2023-01-10 |
Family
ID=84765459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222068391.3U Active CN218274500U (en) | 2022-08-05 | 2022-08-05 | Thermal fuse and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218274500U (en) |
-
2022
- 2022-08-05 CN CN202222068391.3U patent/CN218274500U/en active Active
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