CN205508715U - Temperature sensing type change over switch - Google Patents

Abstract

An object of the utility model is to provide a miniature temperature sensing type change over switch, its theory of operation is opposite with conventional organic matter type temperature fuse: when circuit ambient temperature risees unusually, its temperature sensing change over switch action and then switch on the circuit, and when the unusual rising of ambient temperature was perhaps caught fire, it is turned into on -state by off -state after, its on -state can not change to avoid do not go out nevertheless alarm or instruct the risk of having relieved of conflagration. This temperature sensing type change over switch's is small, only matches with conventional organic matter type temperature fuse, in addition, its temperature sensing material is the organic matter type, has accurate fusing point, can be when ambient temperature reaches the predetermined temperature converting circuit state in time, the reaction is rapidly.

Description

A kind of temperature sensitive type permutator

Technical field

This utility model relates to a kind of temperature sensitive type permutator, and for when high temperature occurs in circuit, turning circuit is to start the device such as alarm, display lamp, especially, relates to a kind of Organic substance temperature sensitive type permutator.

Background technology

Temperature sensitive type permutator is usually used in fire protection warning device.When there is fire, temperature raises rapidly, and temperature sensitive type temperature conversion switch connects circuit when temperature reaches its preset value so that the alarm bell of alarm or display lamp start, thus remind fire fighter to carry out extinguishing operation.

Chinese utility model patent CN204706128U provides a kind of temperature alarming switch, and it includes temperature sensitive member, shell and the ejector member being arranged in shell, permanent magnet assembly and inductance coil；Wherein temperature sensitive member deforms upon along with temperature raises, and causes permanent magnet elements to depart from temperature sensitive member, inserts inductance coil thus start alarm device under the effect of ejector member.But this construction of switch is complicated, bulky.

Critesistor occurs significantly to change along with the change of temperature due to its resistance, so that circuit turn-on or disconnection, is also commonly used for temperature sensitive type permutator, but its volume is big, and cost is high.

Thermal Cutoffs is as a kind of conventional temperature safety element, and volume is little, low cost, is mainly used in when circuit ambient temperature raises, and circuit is cut off in temperature-sensing element action, thus in protection circuit, other elements are from damage.

But in warning circuit, it is undesirable that circuit is normally closed state, because the too much energy so can be lost.Therefore, it is badly in need of a kind of little low cost of volume, and is converted to the temperature sensitive type permutator of normally off when reaching predetermined temperature from normally open.

Summary of the invention

The purpose of this utility model is to provide a kind of small-sized temperature sensitive type permutator, and its operation principle is contrary with conventional organic type Thermal Cutoffs: when circuit environment temperature anomaly raises, its temperature-sensitive permutator action and then turning circuit；And when ambient temperature is abnormal raise or catch fire time, after it is converted into conducting state by off-state, its conducting state will not change, thus avoids fire not go out but the risk that released of alarm or instruction.The volume of this temperature sensitive type permutator is little, only suitable with conventional organic type Thermal Cutoffs；Additionally, its temperature sensing material is organic type, have accurate fusing point, can when ambient temperature reaches predetermined temperature change-over circuit state in time, be swift in response.

The purpose of this utility model is achieved in that

A kind of temperature sensitive type permutator, including metal shell, the first lead-in wire, the second lead-in wire, power spring, Organic substance temperature sensor, collets, wherein metal shell has the first end of Guan Bi and the second end of opening, and power spring, Organic substance temperature sensor and collets are placed in metal shell in order along the direction of the first end to the second end；Protruding first lead-in wire in direction of the second end is deviated from from the first end edge, these collets have through hole, this the second lead-in wire runs through the through hole of these collets, and has the 3rd end with end face stretched out towards this first end and deviate from the 4th end that the 3rd end stretches out from the second end of this opening；This power spring has the 5th end that the first end with metal shell contacts, and deviates from the 6th end of the 5th end；The electric insulation between the second lead-in wire of the first lead-in wire when this Organic substance temperature sensor is in solid-state；When this Organic substance temperature sensor melted by heating, power spring is in diastole state, the end face of the 6th end and the 3rd end contacts, turn between first lead-in wire and the second lead-in wire, at the edge of the second unlimited end, there is inflexed first stop part, for stopping that collets and the second lead-in wire move to the direction deviating from the first end.

Preferably, the diameter of the end face of the 3rd end through hole internal diameter more than collets the internal diameter less than metal shell.

Preferably, Organic substance temperature sensor has shrinkage pool on the side of end face, and the diameter of this shrinkage pool is more than the diameter of the end face of the 3rd end, and the length that the degree of depth of shrinkage pool goes out collets with the 3rd distal process is equal, this the 3rd end with end face stretches into this shrinkage pool, and this end face contacts with the bottom surface of this shrinkage pool.

Preferably, the inwall of metal shell has the second stop part of stepped ramp type, is used for stopping that collets are towards the first end motion.

Preferably, the 6th end has spiral type end face.

Preferably, these collets are porcelain bead.

Preferably, the second end of this opening is sealed by joint filling material.

Preferably, this temperature sensitive type permutator can have conductive pad, and this pad is connected with the 6th end.

Preferably, this pad is the annular shim with hollow hole.

Accompanying drawing explanation

Hereinafter, this utility model will reference will be made to the accompanying drawings, wherein:

Fig. 1 is the structure chart of the first embodiment according to temperature-sensitive permutator of the present invention.

Fig. 2 is the structure chart of the second embodiment according to temperature-sensitive permutator of the present invention.

Fig. 3 is the structure chart of the 3rd embodiment according to temperature-sensitive permutator of the present invention.

Fig. 4 shows the right side of the power spring in the present invention and power spring.

When explaining accompanying drawing, in different accompanying drawings, identical or corresponding parts will use identical label.Therefore, be not required to contact each single accompanying drawing/embodiment and be explained in detail, and, and all parts in not all accompanying drawing be required for give label.

Label list

1-metal shell

2-first goes between

3-second goes between

4-power spring

5-Organic substance temperature sensor

6-collets

7-joint filling material

8-the first end

9-the second end

10-end face

11-the 3rd end

12-the 4th end

13-the 5th end

14-the 6th end

15-the first stop part

16-the second stop part

17-shrinkage pool

18-conductive spacer

Detailed description of the invention

As it is shown in figure 1, have metal shell 1 according to temperature sensitive type permutator of the present utility model, this metal shell 1 has the second end 9 of Packed first end 8 and opening, and the first lead-in wire 2 is protruding from the first end 8 and is connected electrically.It is sequentially loaded into power spring 4, Organic substance temperature sensor 5 and collets 6 according to the order from first end the 8 to the second end 9 in cavity in metal shell 1；These collets 6 can be the insulator of any solid-state, preferably porcelain bead.These collets 6 have through hole, equipped with the second lead-in wire (3) in through hole.In order to prevent the second lead-in wire 3 in assembling process from deviating from from through hole, second lead-in wire 3 stretches out the radius of the 3rd end 11 of collets 6 can be more than the through hole radius of collets 6, and the 3rd end 11 has concordant end face 10, but the radius of the 3rd end 11 is less than the internal diameter of metal shell, to prevent from turning between the second lead-in wire 3 and metal shell 1.In an assembling process, the collets 6 that will be equipped with the second lead-in wire 3 load the intracavity of metal shell 1 from the second end 9, collets 6 are promoted to drive the second lead-in wire 3 to move towards the first end 8, Organic substance temperature sensor 5 and power spring 4, power spring 4 forced compression is extruded by the contact surface of end face 10 with Organic substance temperature sensor 5.Simultaneously, by the second unlimited end 9 inward collapsible, form the first stop part 15, power spring 4 is fixed as compressive state, now the 5th end 13 of power spring 4 electrically connects with the first end 8 and the first lead-in wire, and the 6th end 14 props up the left side of Organic substance temperature sensor 5, and the end face 10 of the 3rd end 11 of the second lead-in wire 3 props up the right side of Organic substance temperature sensor 5, it is to say, Organic substance temperature sensor 5 makes electric insulation between power spring 4 and the second lead-in wire 3.In this process, in order to avoid collets 6 even damage Organic substance temperature sensor to the direction excessive compression of the first end 8, and reserve suitable space to each parts, it is preferable to the inwall at metal shell 1 arranges the second stop part 16 of stepped ramp type.Joint filling material 7 is used to seal, with by all parts in metal shell 1 and external environs at second end 9.

When ambient temperature reaches predetermined temperature, Organic substance temperature sensor 5 melted by heat, it is applied to the distress resolves towards the first end 8 on power spring 4 the 6th end 14, originally the power spring 4 compressed extends, its the 6th end 14 is contacted so that turn between the first lead-in wire 2 and the second lead-in wire 3 with the end face 10 of the 3rd end 11 of the second lead-in wire 3.In this process, because power spring 4 elongation can produce the active force deviating from the first end 8 to end face 10, now, first stop part 15 ensure that the lead-in wire in collets 6 and collets 6 will not be ejected, ensure effectiveness and the stability of conducting state, to avoid fire not to be extinguished, but alarm or indicate discharged risk.

In addition, as shown in Figure 2, Organic substance temperature sensor 5 preferably is being provided with and the left end of the second lead-in wire 3 towards the side of the second lead-in wire 3, i.e. the 3rd corresponding shrinkage pool 17 of end 11, the diameter of shrinkage pool 17 is more than the diameter of end face 10, and the degree of depth of shrinkage pool 17 is equal with the height that the 3rd end 11 highlights collets 6 so that after the 3rd end 11 stretches in this shrinkage pool 17, the bottom surface of shrinkage pool 17 contacts with end face 10, and shrinkage pool contacts along the surface at place and the side of collets 6.So, ensure that in an assembling process, Organic substance temperature sensor 5 is towards the 3rd end 11 and the side of collets 6, i.e. trailing flank in figure, uniform force, in order to avoid when collets 6 are loaded metal shell 1, the right flank of Organic substance temperature sensor 5 is damaged due to discontinuity, improve the yield rate of product.

It should be noted that the right-hand member of power spring 4, the i.e. the 6th end 14 has spiral end face, as shown in Figure 4, so can increase the face area of power spring 4, it is ensured that the uniform force of Organic substance temperature sensor 5, and can have effective contact surface by end face 10 when conducting.

Alternative selection is as it is shown on figure 3, at the right-hand member of power spring 4, the i.e. the 6th end 14 arranges conductive pad 18, equally plays the effect increasing contact area.

Preferred, pad 18 can be the annular shim with through hole, Organic substance temperature sensor 5 melted by heating also spreads in the cavities, pad arranges the diffusion velocity that through hole can accelerate the Organic substance temperature sensor of molten state, prevent it to be trapped between the end face 10 of the 3rd end 11 of pad 18 and the second lead-in wire 3, shorten the response time of element.

Should be appreciated that above-described embodiment of the present utility model is only for clearly demonstrating this utility model example, and be not the restriction to embodiment of the present utility model.For the those of ordinary skill in described field, can also make other changes in different forms on the basis of the above description.Here cannot all of embodiment be given exhaustive.Every belong to obvious change that the technical solution of the utility model amplified out or change the row still in protection domain of the present utility model.

Claims (9)

1. a temperature sensitive type permutator, including metal shell (1), the first lead-in wire (2), the second lead-in wire (3), power spring (4), Organic substance temperature sensor (5), collets (6), it is characterized in that, described metal shell (1) has first end (8) of Guan Bi and second end (9) of opening, and described power spring (4), Organic substance temperature sensor (5) and collets (6) are placed in order along the first end (8) to the direction of the second end (9) in metal shell (1)；Protruding first lead-in wire (2) in direction of the second end (9) is deviated from from described first end (8) edge, described collets (6) have through hole, described second lead-in wire (3) runs through the through hole of described collets (6), and has the 3rd end (11) with end face (10) stretched out towards described first end (8) and deviate from the 4th end (12) that described 3rd end (11) stretches out from second end (9) of described opening；Described power spring (4) has the 5th end (13) that the first end (8) with metal shell contacts, and deviates from the 6th end (14) of described 5th end (13)；When described Organic substance temperature sensor (5) is in solid-state, first goes between (2) and electric insulation between the second lead-in wire (3)；And when described Organic substance temperature sensor (5) melted by heating, power spring (4) is in diastole state, described 6th end (14) contacts with described end face (10), turn between first lead-in wire (2) and the second lead-in wire (3), and second the edge of end (9) there is first stop part (15) of inward collapsible, be used for stopping that described collets (6) and the second lead-in wire (3) move to the direction deviating from the first end (8).

Temperature sensitive type permutator the most according to claim 1, it is characterised in that the diameter of described end face (10) is more than the through hole internal diameter of described collets (6), and is less than the internal diameter of described metal shell (1).

Temperature sensitive type permutator the most according to claim 1 and 2, it is characterized in that, described Organic substance temperature sensor (5) has shrinkage pool (17) on the side of end face (10), the diameter of described shrinkage pool (17) is more than the diameter of described end face (10), the length of the degree of depth of described shrinkage pool (17) collets (6) prominent with the 3rd end (11) is equal, described 3rd end (11) stretches into described shrinkage pool (17), and described end face (10) contacts with the bottom surface of described shrinkage pool (17).

Temperature sensitive type permutator the most according to claim 1 and 2, it is characterized in that, the inwall of described metal shell (1) has second stop part (16) of stepped ramp type, is used for stopping that collets (6) move towards the first end (8).

Temperature sensitive type permutator the most according to claim 1 and 2, it is characterised in that described 6th end (14) has spiral type end face.

Temperature sensitive type permutator the most according to claim 1 and 2, it is characterised in that described collets (6) are porcelain bead.

Temperature sensitive type permutator the most according to claim 1 and 2, it is characterised in that second end (9) of described opening is sealed by joint filling material (7).

Temperature sensitive type permutator the most according to claim 1 and 2, it is characterised in that described temperature sensitive type permutator can have conductive pad (18), described pad (18) is connected with described 6th end (14).

Temperature sensitive type permutator the most according to claim 8, it is characterised in that described pad (18) is the annular shim with hollow hole.