CN218769282U - Contact type fast fusing temperature fuse - Google Patents
Contact type fast fusing temperature fuse Download PDFInfo
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- CN218769282U CN218769282U CN202221978367.7U CN202221978367U CN218769282U CN 218769282 U CN218769282 U CN 218769282U CN 202221978367 U CN202221978367 U CN 202221978367U CN 218769282 U CN218769282 U CN 218769282U
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Abstract
The utility model provides a quick fusing temperature fuse of contact formula, including the first contact of electricity connection and mutual contact in proper order, first temperature sensing body, elastic component and second contact, the elastic component is in elastic deformation state, the utility model provides a temperature fuse adopts the contact and by protection circuit lug connection, need not long pin lead welding, but small and quick installation use to inside through the elastic component that is in elastic deformation state and supplementary welded temperature sensing body switch on first contact and second contact and make the circuit switch on, when outside temperature surpassed safety limit, the temperature sensing body melts and makes the elastic component resume initial condition and separate with first contact or second contact, cuts off the electricity between first contact and the second contact and is connected, but the inside elasticity through the elastic component of temperature fuse is quick disconnection circuit, realizes quick protection circuit or electrical apparatus.
Description
Technical Field
The utility model relates to a fuse technical field, concretely relates to quick fusing temperature fuse of contact formula.
Background
The temperature fuse is an over-temperature protection component, and when the electronic equipment to be protected generates heat due to abnormal faults and the temperature reaches the fusing temperature of the temperature fuse, the temperature sensing body made of the alloy inside the temperature fuse fuses, so that a circuit is cut off. At present, most of temperature fuses are formed by disconnecting a temperature sensing body by means of surface tension of low-melting-point alloy and acting force of a fluxing agent, the fusing speed is low, most of the temperature fuses are connected to a protected circuit through leads, and the temperature fuses occupy larger space in the circuit and need to be welded through the leads.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the contact type fast fusing temperature fuse is small in size and fast in fusing speed of the temperature sensing body, and leads are not needed to be welded to a circuit.
In order to solve the technical problem, the utility model discloses a technical scheme be:
a contact type fast fusing temperature fuse comprises a first contact, a first temperature sensing body, an elastic piece and a second contact which are electrically connected in sequence and mutually contacted; the elastic piece is in an elastic deformation state.
Further, the elastic deformation state is an elastic stretching state, and when the first temperature sensing body is melted due to excessive temperature, the elastic piece retracts and is disconnected from the first contact.
Furthermore, the elastic piece is a continuous bent elastic piece, and two ends of the elastic piece are respectively contacted with the second contact and the first temperature sensing body.
Further, the elastic deformation state is an elastic compression state, and when the first temperature sensing body is melted due to over-temperature, the elastic piece stretches and breaks contact with the first contact and/or the second contact.
Furthermore, the elastic part comprises a gasket and an elastic sheet which is symmetrically bent, a limiting inclined plane is arranged at the position, close to the second contact, of the elastic sheet, the bent part of the elastic sheet abuts against the limiting inclined plane and is in contact connection with the second contact, two ends of the elastic sheet abut against one side of the gasket, and the other side of the gasket abuts against the first temperature sensing body.
The first contact comprises a first head part attached to the outside of the shell and a first connecting part with one end connected with the first head part, and the other end of the first connecting part is welded with the first temperature sensing body; the second contact comprises a second head part attached to the outer part of the shell and a second connecting part of which one end is connected with the second head part, and the other end of the second connecting part is in contact with the elastic part.
Furthermore, the area of the end face of the first head contact circuit is 25 to 200 percent of the whole area of the end face of the shell adjacent to the first head;
the area of the end face of the second head part, which is connected with the conducting circuit, is 25% -200% of the whole area of the end face of the shell adjacent to the second head part.
Furthermore, the distance range from one end of the first head part, which is far away from the shell, to the outer edge of the first connecting part embedded in the shell is 0.1mm-10mm, and the distance range from one end of the second head part, which is far away from the shell, to the outer edge of the second connecting part embedded in the shell is 0.1mm-10mm.
Furthermore, the end face of the first head contact circuit is a plane, a spherical crown face or a tooth-line face, and the end face of the second head contact circuit is a plane, a spherical crown face or a tooth-line face.
Furthermore, the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are connected in a sealing mode to form an accommodating cavity, the first contact, the first temperature sensing body, the elastic piece and the second contact are installed in the accommodating cavity, and the suspended end portions of the first contact and the second contact extend out of the accommodating cavity.
Furthermore, the first contact is a cylindrical part, the axial section of the first contact is in a straight shape, an inverted T shape or an inverted I shape, and the axial section of the second contact is in a straight shape, an inverted T shape or an inverted I shape.
Furthermore, the temperature-sensing device also comprises a second temperature-sensing body, wherein the second temperature-sensing body is arranged between the elastic piece and the second contact, and the elastic piece is electrically connected with the second contact through the second temperature-sensing body.
Further, still including the welding base that inserts in the circuit, welding base middle part is provided with the mounting groove, first contact and second contact card are gone into in the mounting groove.
The beneficial effects of the utility model reside in that: the temperature fuse adopts the contact and is protected circuit lug connection, need not long pin lead welding, small and can install the use fast, and inside first contact and the second contact of conducting through the elastic component that is in the elastic deformation state and supplementary welded temperature sensing body make the circuit switch on, when external temperature exceeded safety limit, the temperature sensing body melts and makes the elastic component resume initial condition and separate with first contact or second contact, cut off the electric connection between first contact and the second contact, the inside circuit that can be quick disconnection through the elasticity of elastic component of temperature fuse, realize quick protection circuit or electrical apparatus.
Drawings
Fig. 1 is an explosion structure diagram of a contact type fast fusing temperature fuse according to a first embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a contact type fast fusing thermal fuse according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a contact type fast fusing thermal fuse according to an embodiment of the present invention after a first temperature sensing body is fused;
fig. 4 is a schematic cross-sectional view of a first temperature-sensing body and a second temperature-sensing body of a contact type fast fusing temperature fuse according to an embodiment of the present invention after being fused;
fig. 5 is a schematic structural view of a first contact and a second contact in a line shape of a contact type fast fusing temperature fuse according to a first embodiment of the present invention;
fig. 6 is a schematic structural view of a first contact and a second contact of a contact type fast fusing thermal fuse in an inverted T shape according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a first contact and a second contact of an inverted i-shaped contact type rapid fusing thermal fuse according to a first embodiment of the present invention;
fig. 8 is a schematic structural diagram of a first contact and a second contact of a contact type fast fusing thermal fuse according to a first embodiment of the present invention, in which the conduction surfaces are planar;
fig. 9 is a schematic structural view of a first contact and a second contact of a contact type fast fusing temperature fuse according to a first embodiment of the present invention, where the conducting surfaces of the first contact and the second contact are spherical cap surfaces;
fig. 10 is a schematic structural view of a first contact and a second contact of a contact type fast fusing temperature fuse according to a first embodiment of the present invention, where the conductive surfaces are corrugated surfaces;
fig. 11 is an explosion structure diagram of a contact type fast fusing temperature fuse according to the second embodiment of the present invention;
fig. 12 is a schematic cross-sectional view of a contact type fast fusing thermal fuse according to a second embodiment of the present invention;
fig. 13 is a schematic cross-sectional view illustrating a melted first temperature sensing body of a contact type fast fusing temperature fuse according to a second embodiment of the present invention;
fig. 14 is a schematic view of an installation structure of a contact type fast fusing temperature fuse according to a third embodiment of the present invention;
fig. 15 is a schematic cross-sectional view of a contact type fast fusing thermal fuse according to an embodiment of the present invention.
Description of reference numerals:
1. a housing; 11. an upper housing; 12. a lower housing; 13. an accommodating chamber; 14. a limiting inclined plane; 2. a first contact; 21. a first head portion; 22. a first connection portion; 3. a first temperature-sensing body; 41. a spring plate; 42. a gasket; 5. a second temperature sensing body; 6. a second contact; 61. a second head; 62. a second connecting portion; 7. welding a base; 71. and (4) mounting the groove.
Detailed Description
In order to explain the technical contents, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 15, a contact type fast fusing thermal fuse includes a first contact, a first temperature sensing body, an elastic member, and a second contact, which are electrically connected in sequence and in contact with each other; the elastic piece is in an elastic deformation state.
From the above description, the beneficial effects of the present invention are: the temperature fuse is directly connected with a protected circuit through the contact, long pin lead welding is not needed, the size is small, the temperature fuse can be installed and used quickly, the first contact and the second contact are conducted with the temperature sensing body assisting welding through the elastic piece in the elastic deformation state, the circuit is conducted, when the external temperature exceeds the safety limit, the temperature sensing body melts, the elastic piece restores the initial state and is separated from the first contact or the second contact, the electric connection between the first contact and the second contact is cut off, the circuit can be disconnected quickly through the elasticity of the elastic piece in the temperature fuse, and the circuit or the electric appliance can be protected quickly.
Further, the elastic deformation state is an elastic stretching state, and when the first temperature sensing body is melted due to over-temperature, the elastic piece retracts and is disconnected from the first contact.
As can be seen from the above description, the elastic element may be an elastic element in a stretched state, for example, a tension spring or the like is used, when the first contact and the second contact are connected to the protected circuit, the elastic element is stretched, the first contact is welded to one end of the elastic element through the first temperature sensing body, the other end of the elastic element may be connected through solderless welding, conductive glue bonding, riveting or the like, after the first temperature sensing body is melted at an excessive temperature, the elastic element retracts to disconnect the electrical connection with the first contact, thereby disconnecting the protected circuit, and achieving an effect of quickly protecting the circuit or the electrical appliance.
Furthermore, the elastic piece is a continuous bent elastic piece, and two ends of the elastic piece are respectively contacted with the second contact and the first temperature sensing body.
As can be seen from the above description, the elastic member is a continuously bending elastic piece, that is, an elongated sheet is continuously bent and formed, when the elastic piece is installed, the elastic piece is elongated and is connected to the first temperature sensing body and the second contact at two ends, respectively, when the first temperature sensing body is melted, the elastic piece is kept connected to the second contact, the elastic piece has an elastic force of recovering the original state, so that the end welded to the first temperature sensing body moves to the second contact, the electrical connection between the first contact and the second contact is disconnected, thereby disconnecting the protected circuit, and the elastic piece is easy to manufacture and install and is elastically stable.
Further, the elastic deformation state is an elastic compression state, and when the first temperature sensing body is melted due to excessive temperature, the elastic part stretches and breaks contact with the first contact and/or the second contact.
As can be seen from the above description, the elastic element may be an elastic element in a compressed state, for example, a torsion spring or the like is used, when the first contact and the second contact are connected to the protected circuit, the elastic element is compressed, the first contact is conducted with the elastic element through the first temperature sensing body, and after the first temperature sensing body is melted due to an excessive temperature, the elastic element is pressed to keep moving or removing in the compressed state, so that the elastic element is electrically disconnected from the first contact or the second contact, thereby disconnecting the protected circuit and achieving an effect of quickly protecting the circuit or the electrical appliance.
Furthermore, the elastic piece comprises a gasket and a spring sheet which is symmetrically bent, a limiting inclined plane is arranged at a position, close to the second contact, of the spring sheet, the bent part of the spring sheet abuts against the limiting inclined plane and is in contact connection with the second contact, two ends of the spring sheet abut against one side of the gasket, and the other side of the gasket abuts against the first temperature sensing body.
The elastic sheet is abutted to the bending part through the limiting inclined plane, the end part of the elastic sheet is abutted to the first temperature sensing body through the gasket, two parts of the bent elastic sheet are oppositely close to be compressed, the bending part of the elastic sheet is in contact conduction with the second contact, the first temperature sensing body is electrically connected with the first contact, a circuit can be normally switched on in a safe temperature, when the first temperature sensing body is melted due to over temperature, a deformable space is formed between the gasket and the first temperature sensing body, the two parts of the bent compressed elastic sheet are opened due to the resilience of the elastic sheet, the bending part is abutted to the gasket to move towards the direction close to the first contact due to the limitation of the limiting inclined plane, the bending part is separated from the second contact, the first outlet is disconnected from the second contact, the electric connection of the second contact is disconnected, and the effect of quickly protecting the circuit or the electric appliance is achieved.
The first contact comprises a first head part attached to the outside of the shell and a first connecting part with one end connected with the first head part, and the other end of the first connecting part is welded with the first temperature sensing body; the second contact comprises a second head part attached to the outer part of the shell and a second connecting part of which one end is connected with the second head part, and the other end of the second connecting part is in contact with the elastic part.
As can be seen from the above description, the contact is arranged to protrude from the head part of the shell and the connecting part of the inner contact temperature-sensing body and the elastic part, the connecting part in the shell can effectively contact with the inner temperature-sensing body alloy and the elastic part to transfer heat, and the contact structure is convenient for positioning and installing the elastic part and the temperature-sensing body.
Furthermore, the area of the end face of the first head contact circuit is 25 to 200 percent of the whole area of the end face of the shell adjacent to the first head;
the area of the end face of the second head part, which is connected with the circuit in a conducting mode, is 25% -200% of the whole area of the end face of the shell, which is adjacent to the second head part.
It can be known from the above description that the end surfaces of the first head part and the second head part for contacting and conducting the access circuit are set to be 25% to 200% of the adjacent end surfaces on the shell, so that the contact surface of the temperature fuse access circuit is larger than the cross section of the shell, the outer side heat conductivity of the temperature fuse is good, the external temperature can be better transmitted to the inside, and the sensitivity of temperature sensing fusing protection is improved.
Furthermore, the distance range from one end of the first head part, which is far away from the shell, to the outer edge of the first connecting part embedded in the shell is 0.1mm-10mm, and the distance range from one end of the second head part, which is far away from the shell, to the outer edge of the second connecting part embedded in the shell is 0.1mm-10mm.
From the above description, the lengths of the first head part of the first contact and the second head part of the second contact exposed out of the housing are set to be 0.1mm-10mm, so that the length of the exposed part of the contact of the temperature fuse access circuit is shorter, the temperature can be more quickly transmitted to the inner temperature sensing body of the housing, the temperature sensing body is quickly fused to break the circuit, and the safety of the circuit is protected.
Furthermore, the end face of the first head contact circuit is a plane, a spherical crown face or a tooth-line face, and the end face of the second head contact circuit is a plane, a spherical crown face or a tooth-line face.
As can be seen from the above description, the contact surfaces of the heads of the two contacts connected to the circuit are configured as a plane, a spherical crown surface or a toothed surface, the plane shape is convenient for processing and installation, the spherical crown surface and the toothed surface can adapt to different circuit installation structures and can increase the contact surface in a limited space, reduce the volume and improve the heat transfer efficiency.
Furthermore, the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are connected in a sealing mode to form an accommodating cavity, the first contact, the first temperature sensing body, the elastic piece and the second contact are installed in the accommodating cavity, and the suspended end portions of the first contact and the second contact extend out of the accommodating cavity.
It can be known from the above description that the shell sets up to upper casing and lower casing two parts, can be with first contact, the second contact, elastic component and temperature sensing body link into the welding body and pack into one of them earlier, the equipment forms closed housing again, be convenient for install the elastic component and inspect the internal quality directly perceivedly when the equipment is good or bad, guarantee the finished product quality, can be for holding the shell for the lower casing, the upper casing is for sealing the lid shell, also can set up to upper casing and lower casing be the same shape, respectively set up logical groove at the both ends of upper casing and the both ends of lower casing, can form two through-holes on the shell after upper casing and lower casing sealing connection, it is convenient for install the welding body to set up logical groove on upper casing and lower casing, and upper casing and lower casing also can be fast accurate equipment.
Furthermore, the first contact is a cylindrical part, the axial section of the first contact is in a straight shape, an inverted T shape or an inverted I shape, and the axial section of the second contact is in a straight shape, an inverted T shape or an inverted I shape.
As can be seen from the above description, the first contact and the second contact are provided as cylindrical members having a large outer side and a small inner side, so as to facilitate installation and transmission of external temperature, and the inverted T-shape and the inverted i-shape are convenient for positioning during installation.
Furthermore, the temperature-sensing device also comprises a second temperature-sensing body, wherein the second temperature-sensing body is arranged between the elastic piece and the second contact, and the elastic piece is electrically connected with the second contact through the second temperature-sensing body.
As can be seen from the above description, the second temperature-sensing body is disposed between the elastic member and the second contact, so that the interior of the thermal fuse can be fused more rapidly to open the circuit when the temperature is over-temperature.
Further, still including the welding base that inserts in the circuit, welding base middle part is provided with the mounting groove, first contact and second contact card are gone into in the mounting groove.
As can be seen from the above description, the solder mount base is provided so that the thermal fuse can be mounted and used through the solder mount base in various circuit board environments requiring wave soldering or reflow soldering processes.
The utility model discloses a quick fusing temperature fuse of contact formula is applicable to direct contact's circuit installation environment, and the first contact of accessible and second contact direct contact circuit connection also can load the application of temperature fuse main part in needs welded circuit board through welding the dress base, and inside adopts elastic construction and temperature sensing body conduction circuit, and the temperature transmits the inside of temperature fuse fast during the excess temperature, but its inner structure break off fast under the effect of elasticity, satisfies quick fusing demand.
Referring to fig. 1 to 10, a first embodiment of the present invention is:
a contact type fast fusing temperature fuse is shown in figure 1 and comprises a shell 1, and a first contact 2, a first temperature sensing body 3, an elastic piece and a second contact 6 which are arranged in the shell 1. The shell 1 comprises an upper shell 11 and a lower shell 12, the upper shell 11 and the lower shell 12 are connected in a sealing mode to form a containing cavity 13 in a surrounding mode, the first contact 2, the first temperature sensing body 3, the elastic piece and the second contact 6 are installed in the containing cavity 13, and the two empty ends of the first contact 2 and the second contact 6 are electrically connected with the protection circuit in a contact mode.
As shown in fig. 2 to 4, the first contact 2 includes a first head 21 attached to the outside of the housing 1 and a first connection portion 22 having one end connected to the first head 21, and the other end of the first connection portion 22 is welded to the first temperature sensing body 3. The second contact 6 includes a second head portion 61 attached to the outside of the housing 1 and a second connection portion 62 having one end connected to the second head portion 61, and the other end of the second connection portion 62 is welded to the second temperature-sensitive body 5. The elastic member is a continuous bending elastic sheet 41, one end of the elastic sheet 41 is in contact with and electrically connected with the first temperature sensing body 3, and the other end is in contact with and electrically connected with the second contact 6. Through grooves are respectively formed at two ends of the upper shell 11 and two ends of the lower shell 12, and the first connecting portion 22 and the second connecting portion 62 are respectively embedded in the shell 1 through the through grooves. When the environmental temperature exceeds the safety limit, the heat is rapidly transmitted to the temperature fuse through the first outlet and the second contact 6, the first temperature sensing body 3 is melted at the over-temperature, one end of the elastic sheet connected with the elastic sheet is released, the elastic sheet is shortened by the elastic force of self-recovering, the electric connection with the first contact 2 is disconnected, and the elastic sheet is rapidly disconnected to protect a circuit or an electric appliance.
Wherein, the area of the end face of the first head part 21 contacting the circuit conduction is 25% to 200% of the whole area of the end face of the shell 1 adjacent to the first head part 21; the area of the end face of the second head part 61 contacting the circuit conduction is 25% -200% of the whole area of the end face of the shell 1 adjacent to the second head part 61. The distance from one end of the first head part 21 far away from the shell 1 to the outer edge of the shell 1 where the first connecting part 22 is embedded ranges from 0.1mm to 10mm, and the distance from one end of the second head part 61 far away from the shell 1 to the outer edge of the shell 1 where the second connecting part 62 is embedded ranges from 0.1mm to 10mm.
In the present embodiment, as shown in fig. 7 and 8, each of the first contact 2 and the second contact 6 is a cylindrical member and has an inverted i-shaped axial cross section, and end surfaces of the first head portion 21 and the second head portion 61 away from the housing 1 are flat surfaces, that is, end surfaces of the first head portion 21 and the second head portion 61 contacting the circuit are flat surfaces. The first temperature sensing body 3 is in a circular sheet shape, and can be directly used as a welding flux to weld the first contact 2 and the elastic sheet to play a role in fixed electric connection, when the first temperature sensing body 3 in the circular sheet shape is melted at an over-temperature, the elastic sheet is easily disconnected from the first contact 2, and the second contact 6 and the elastic sheet can be electrically connected through the second temperature sensing body 5. The shell 1 is prism-shaped and has a containing cavity 13 therein, the upper shell 11 of the shell 1 occupies a smaller total volume than the lower shell 12, the i-shaped vertical rod portions of the first connecting portion 22 and the second connecting portion 62 are clamped in the through groove of the lower shell 12, and the first head portion 21 and the second head portion 61 are abutted against the outer side of the shell 1, so that the elastic sheet can be fixed in the shell 1 in an elongated manner directly through the shapes of the shell and the first contact 2 and the second contact 6. The housing 1 may be made of plastic or ceramic.
In other equivalent embodiments, as shown in fig. 5 to 6 and 9 to 10, the first contact 2 and the second contact 6 may also be columns of different shapes, and the axial cross-sectional shape thereof is a straight shape or an inverted T shape; the first temperature-sensing body 3 and the second temperature-sensing body 5 can also be in an oval sheet shape or a square sheet shape, and only one of the first temperature-sensing body and the second temperature-sensing body can be electrically connected with each other in a manner that the elastic sheet is fixed in a solderless welding or riveting mode at the other position; the housing 1 may also be cylindrical or semi-cylindrical in shape.
The working principle of the contact type quick fusing temperature fuse of the first embodiment is as follows:
as shown in fig. 3 and 4, after the external temperature exceeds the safety limit, the first temperature sensing body 3 and the second temperature sensing body 5 are melted too high, and only one end of the elastic piece is released, the elastic piece will be shortened due to the elastic force of the elastic piece, and the first contact 2 and the second contact 6 are fixed at the original position on the housing 1, so that the elastic piece is disconnected from the first contact 2 and the second contact 6, and the protected circuit is disconnected.
Referring to fig. 11 to 13, a second embodiment of the present invention is:
the utility model provides a contact formula quick fusing temperature fuse, based on above-mentioned embodiment one, the difference lies in: as shown in fig. 11, the elastic member includes a spacer 42 and a spring plate 41 having a symmetrical bent shape, the accommodating cavity 13 in the housing 1 includes a cylindrical cavity having a limiting inclined surface 14 and a limiting groove having a bullet-shaped longitudinal section for fixing the first contact 2 and the second contact 6, and the first contact 2, the first temperature-sensing body 3, the spacer 42, the spring plate 41, and the second contact 6 are once loaded into the accommodating cavity 13 of the housing 1. The elastic sheet 41 is bent into a heart shape with separated end parts, two symmetrical parts of the elastic sheet 41 after being arranged in the accommodating cavity 13 are further compressed oppositely, the end parts are close to each other and have elasticity of expanding and recovering the original shape, and the part close to the bending part is abutted against the limiting inclined surface 14. The bent portion of the elastic sheet 41 is electrically connected to the second contact 6, and the two ends of the elastic sheet 41 close to each other are pressed against the gasket 42 and electrically connected to the first temperature-sensing body 3 and the first contact 2 through the gasket 42.
The working principle of the contact type fast fusing temperature fuse of the second embodiment is as follows:
as shown in fig. 13, after the external temperature exceeds the safety limit, the first temperature-sensing body 3 is over-melted, the gasket 42 and the first temperature-sensing body 3 generate a deformable space, the resilient force of the resilient piece 41 opens the two compressed bent portions, and the bent portion is pressed against the gasket 42 to move toward the first contact 2 due to the limitation of the limiting inclined surface 14, so that the bent portion is separated from the second contact 6 to break the electrical connection between the first outlet and the second contact 6, thereby breaking the protected circuit.
Referring to fig. 14 and fig. 15, a third embodiment of the present invention is:
based on the first embodiment or the second embodiment, the contact type fast fusing temperature fuse in the embodiment is changed into the following structure: the welding circuit further comprises a welding base 7 connected into the welding circuit, wherein the middle of the welding base 7 is provided with a mounting groove 71, and the first contact 2 and the second contact 6 are clamped into the mounting groove 71.
To sum up, the utility model provides a pair of quick fusing temperature fuse of contact formula, inside adopts elastic construction and temperature sensing body conduction circuit, and the inside of temperature fuse is transmitted fast to the temperature during excess temperature, but its inner structure is the quick disconnection under the effect of elasticity to adopt the contact and by protection circuit lug connection, need not long pin lead welding, but small and quick installation use is compared in the pin connection more can the quick heat transfer, thereby satisfies quick fusing demand.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (12)
1. A contact type fast fusing temperature fuse is characterized by comprising a first contact, a first temperature sensing body, an elastic piece and a second contact which are sequentially and electrically connected and mutually contacted; the elastic piece is in an elastic deformation state; the first contact comprises a first head part attached to the outside of the shell and a first connecting part with one end connected with the first head part, and the other end of the first connecting part is welded with the first temperature sensing body; the second contact comprises a second head part attached to the outside of the shell and a second connecting part with one end connected with the second head part, and the other end of the second connecting part is in contact with the elastic part.
2. The contact type fast fusing temperature fuse according to claim 1, wherein the elastic deformation state is an elastic stretching state, and when the first temperature sensing body melts due to excessive temperature, the elastic member retracts and breaks contact with the first contact.
3. The contact type fast fusing temperature fuse according to claim 2, wherein the elastic member is a continuous bent spring plate, and two ends of the spring plate are respectively contacted with the second contact and the first temperature sensing body.
4. The contact type rapid fusing temperature fuse according to claim 1, wherein the elastic deformation state is an elastic compression state, and when the first temperature sensing body melts due to excessive temperature, the elastic piece stretches and breaks contact with the first contact and/or the second contact.
5. The contact type rapid fusing temperature fuse according to claim 4, wherein the elastic element comprises a gasket and a spring plate which is symmetrically bent, a position of the spring plate close to the second contact is provided with a limiting inclined plane, the bent part of the spring plate is pressed against the limiting inclined plane and is in contact connection with the second contact, two ends of the spring plate abut against one side of the gasket, and the other side of the gasket abuts against the first temperature sensing body.
6. The contact type rapid fusing temperature fuse according to claim 1, wherein the area of the end surface of the first head portion for contacting the circuit conduction is 25% to 200% of the whole area of the end surface of the shell adjacent to the first head portion;
the area of the end face of the second head part for contacting the circuit conduction is 25% -200% of the whole area of the end face of the shell adjacent to the second head part.
7. The contact type fast fusing temperature fuse according to claim 1, wherein the distance from the end of the first head portion far from the shell to the outer edge of the shell where the first connecting portion is embedded is in a range of 0.1mm to 10mm, and the distance from the end of the second head portion far from the shell to the outer edge of the shell where the second connecting portion is embedded is in a range of 0.1mm to 10mm.
8. The contact type rapid fusing temperature fuse according to claim 1, wherein the end surface of the first head portion for contacting the circuit is a plane, a spherical crown surface or a serration surface, and the end surface of the second head portion for contacting the circuit is a plane, a spherical crown surface or a serration surface.
9. The contact type quick fusing temperature fuse according to claim 1, wherein the housing comprises an upper housing and a lower housing, the upper housing and the lower housing are hermetically connected to form a containing cavity, the first contact, the first temperature sensing body, the elastic member and the second contact are installed in the containing cavity, and the suspended end portions of the first contact and the second contact extend out of the containing cavity.
10. The contact type rapid fusing temperature fuse according to claim 1, wherein the first contact is a cylindrical member having an axial cross section in a straight shape, an inverted T shape or an inverted i shape, and the second contact is a cylindrical member having an axial cross section in a straight shape, an inverted T shape or an inverted i shape.
11. The contact type rapid fusing off temperature fuse according to claim 1, further comprising a second temperature sensing body disposed between the elastic member and the second contact, wherein the elastic member is electrically connected to the second contact through the second temperature sensing body.
12. The contact type rapid fusing temperature fuse according to claim 1, further comprising a welding base connected to a circuit, wherein an installation groove is formed in the middle of the welding base, and the first contact and the second contact are clamped into the installation groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221978367.7U CN218769282U (en) | 2022-07-29 | 2022-07-29 | Contact type fast fusing temperature fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221978367.7U CN218769282U (en) | 2022-07-29 | 2022-07-29 | Contact type fast fusing temperature fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218769282U true CN218769282U (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221978367.7U Active CN218769282U (en) | 2022-07-29 | 2022-07-29 | Contact type fast fusing temperature fuse |
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