CN203085468U - Novel temperature fuse wire - Google Patents

Abstract

The utility model discloses a novel temperature fuse wire. The novel temperature fuse wire comprises metal pins, seal resin, a shell, a fluxing agent and two fusible alloys, wherein the metal pins are welded with the two ends of the two fusible alloys, and the fusible alloy fusible alloys and part of the metal pins are packed in an insulation space of the shell through the seal resin; and the fluxing agent is filled in an inner closed space packed by the shell and the seal resin, the two fusible alloys are of an X shape and are welded with the metal pins, and the bottom of the shell has an inward convex triangle shape. The novel temperature fuse wire provided by the utility model utility model has the advantages that a cross point of the two fusible alloys is weak in an acting process, a cut-off point is cut off from the cross point, the adsorption of the fusible alloys by the metal pins is high so as to be beneficial to contraction of the fusible alloys towards the pins, and connection of the fusible alloys are avoided; and due to the structure of the shell, electric arc can be reduced, sparkle and combustion potential safety hazard are avoided, the use safety is improved, the shell is also capable of effectively preventing the fused fusible alloys from being connected again after disconnecting, and the circuit is permanently cut off.

Description

Novel Thermal Cutoffs

Technical field

The utility model relates to special resistance product scope in the electronic circuit, relates in particular to novel Thermal Cutoffs.

Background technology

Thermal Cutoffs is the device that one-time action can not reset, and is widely used in the heat protection of equipment, prevents that under the condition of fault one or more positions from reaching dangerous temperature.Existing Thermal Cutoffs is mainly based on alloy-type temperature fuse, constitute with the disconnected agent of fluxing by having low-melting fusible alloy, be encapsulated in the shell of plastics or pottery, under normal operation, fusible alloy keeps being connected with two pins, when Thermal Cutoffs is experienced abnormal heating and reach predetermined melting temperature, the fusible alloy fusing, and under the effect of the disconnected agent of fluxing open circuit.

The Thermal Cutoffs of prior art; because fusible alloy is connected with two pin straight lines; in the process of action; usually, cause electric arc to produce, and then cause that the Thermal Cutoffs product sparkles because two pin electric currents are excessive; phenomenons such as burning; bring certain hidden danger to use; for this reason, the Thermal Cutoffs of prior art is in order to improve fail safe; also there is the fusible alloy that has adopted two parallel connections to be connected with two pin straight lines; though this Thermal Cutoffs has improved the electric current that passes through; in use; a fusible alloy that tends to take place wherein breaks, an other disconnected situation, even; it is disconnected that one of them can take place; the disconnected fusion of that disconnected root fusible alloy is on that not disconnected root fusible alloy, and the result who causes must be the performance that this Thermal Cutoffs loses open circuit, protective circuit effectively.

Summary of the invention

The novel Thermal Cutoffs that the utility model provides, the fusible alloy that has changed two parallel connections of prior art is connected with two pin straight lines, and structurally carry out the design of arc protection, can effectively reduce the arcing in the course of action, avoid sparkling, potential safety hazard such as burning.

The utility model is realized by following scheme: novel Thermal Cutoffs, comprise metal pins, seal resin, shell, the disconnected agent of fluxing, two fusible alloys, the two ends of metal pins and two fusible alloys are welded to connect, fusible alloy and part metals pin are by sealing resin-encapsulated in the shell insulating space, and at shell with seal and fill the disconnected agent of fluxing in the inside confined space of resin-encapsulated, it is characterized in that: two fusible alloys are " X " shape and metal pins is welded to connect, and have inwardly protruded triangular shape at outer casing bottom.

The utility model is compared with existing technology, in the process of action, because the crosspoint of two fusible alloys is relatively weaker, cut-off point begins to disconnect from infall, simultaneously, metal pins and two fusible alloys on every limit have two solder joints, and metal pins is relatively big to the absorption of the fusible alloy of fusing, help fusible alloy and shrink, the situation that can avoid fusible alloy to connect again to pin.Simultaneously, shell has inwardly protruded triangular shape, therefore the effective electric arc at barrier metal pin two ends reduce the generation of electric arc, avoids sparkling, potential safety hazard such as burning, it is safe in utilization to improve Thermal Cutoffs, after the disconnection, the fusible alloy of fusing can deposit outer casing bottom, and the fusible alloy that can effectively intercept fusing of the triangular shape of shell projection connects once more, permanent open circuit, thereby improve safe in utilization.

Description of drawings

Fig. 1 is the utility model schematic cross-section.

The Thermal Cutoffs schematic cross-section that Fig. 2 is connected in parallel for two fusible alloys of prior art.

Among Fig. 1: 1-metal pins, 2-seal resin, 3-shell, 4-flux disconnected agent, 5-fusible alloy.

Among Fig. 2: 1 '-metal pins, 2 '-seal resin, 3 '-shell, 4 '-flux disconnected agent, 5 '-fusible alloy.

Embodiment

Novel Thermal Cutoffs, comprise metal pins (1), seal resin (2), shell (3), the disconnected agent (4) of fluxing, two fusible alloys (5), the two ends of metal pins (1) and two fusible alloys (5) are welded to connect, fusible alloy (5) and part metals pin (1) are encapsulated in shell (3) insulating space by sealing resin (2), and at shell (3) with seal in the inside confined space of resin (2) encapsulation the filling disconnected agent (4) of fluxing, it is characterized in that: two fusible alloys (5) are " X " shape and metal pins (1) is welded to connect, and have inwardly protruded triangular shape in shell (3) bottom.

The utility model is in such work: in the process of action, because the crosspoint of two fusible alloys (5) is relatively weaker, cut-off point begins to disconnect from infall, simultaneously, metal pins (1) and two fusible alloys (5) on every limit have two solder joints, metal pins (1) is relatively big to the absorption of the fusible alloy (5) of fusing, helps fusible alloy (5) and shrinks the situation that can avoid fusible alloy (5) to connect again to metal pins (1).Simultaneously, shell (3) has inwardly protruded triangular shape, therefore the effective electric arc at barrier metal pin (1) two ends reduce the generation of electric arc, avoids sparkling, potential safety hazard such as burning, it is safe in utilization to improve Thermal Cutoffs, after the disconnection, the fusible alloy of fusing (5) can deposit shell (3) bottom, and the fusible alloy (5) that can effectively intercept fusing of the triangular shape of shell (3) projection connects once more, permanent open circuit, thereby improve safe in utilization.

Claims (1)

1. novel Thermal Cutoffs, comprise metal pins (1), seal resin (2), shell (3), the disconnected agent (4) of fluxing, two fusible alloys (5), the two ends of metal pins (1) and two fusible alloys (5) are welded to connect, fusible alloy (5) and part metals pin (1) are encapsulated in shell (3) insulating space by sealing resin (2), and at shell (3) with seal in the inside confined space of resin (2) encapsulation the filling disconnected agent (4) of fluxing, it is characterized in that: two fusible alloys (5) are " X " shape and metal pins (1) is welded to connect, and have inwardly protruded triangular shape in shell (3) bottom.

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