CN218631812U - Manual reset overload protector - Google Patents

Abstract

The utility model relates to a protector technical field especially relates to a manual reset overload protection ware, include: the insulating shell is internally provided with an installation cavity; the first conductor is arranged on the insulating shell, and two ends of the first conductor respectively extend into the installation cavity and the outside of the insulating shell; the second conductor is arranged on the insulating shell and is separated from the first conductor, and two ends of the second conductor respectively extend into the installation cavity and the outside of the insulating shell; one end of the second conductor, which is positioned in the mounting cavity, is provided with a fixed contact; one end of the temperature sensing deformation sheet is connected with the mounting cavity, and the other end of the temperature sensing deformation sheet is provided with a moving contact; the electric heating body is arranged in the mounting cavity, and two ends of the electric heating body are respectively connected with the first conductor and the temperature sensing deformation sheet; the middle section of the electric heating body is arranged above the middle section of the temperature sensing deformation sheet; the sliding block slides along a horizontal straight line in the mounting cavity; the sliding block is provided with a manual block extending to the outer side of the insulating shell; the sliding block is also provided with an isolation section; and the spring is arranged between the sliding block and the inner wall of the mounting cavity. The protector can effectively improve the sensitivity of the open circuit protection action.

Description

Manual reset overload protector

Technical Field

The utility model relates to a protector technical field especially relates to a manual reset overload protection ware.

Background

The protector is an element often arranged in a circuit of electric equipment, and can cut off the circuit when the circuit is overloaded, so that the danger of burning out, firing and the like of the circuit is avoided.

Two contacts and a temperature sensing deformation sheet are arranged in the protector, and the two contacts are mutually attached to enable the protector to be electrified in a normal circuit state; when the circuit temperature rises due to circuit overload, the temperature sensing deformation sheet deforms to drive one of the contacts to move so as to separate the two contacts, thereby realizing the function of open circuit protection; after the temperature drops, the temperature sensitive deformation sheet returns to the original shape. For some specific-demand electric equipment, the circuit needs to be allowed to be switched on again after the dangerous hidden danger of the circuit is eliminated, so that the overload protector capable of being reset and powered on manually appears, the isolating piece can stretch into the isolating piece between the two contacts when the two contacts are separated, even if the temperature-sensing deformation piece rebounds after the temperature drops, the two contacts cannot be attached under the isolation of the isolating piece, and the power on the protector can be recovered only by manually pulling the isolating piece away by a person.

It can be seen that the circuit breaking protection action of the protector is directly related to the ambient temperature of the temperature sensing deformation sheet, but because the protector is internally provided with the isolating piece, the moving assembly of the isolating piece and the space reserved for the movement of the isolating piece, the temperature of an external circuit can be reached only within a certain time, and the deformation of the temperature sensing deformation sheet has certain hysteresis, so that the sensitivity of the protector is influenced.

Therefore, there is a need for a more sensitive manual reset overload protector.

SUMMERY OF THE UTILITY MODEL

The utility model provides a manual reset overload protector can solve the problem in the background art effectively.

The utility model provides a pair of manual reset overload protection ware, include:

the insulating shell is internally provided with an installation cavity;

the first conductor is arranged on the insulating shell, and two ends of the first conductor respectively extend into the installation cavity and the outside of the insulating shell;

the second conductor is arranged on the insulating shell and is separated from the first conductor, and two ends of the second conductor respectively extend into the installation cavity and the outside of the insulating shell; one end of the second conductor, which is positioned in the mounting cavity, is provided with a fixed contact;

one end of the temperature sensing deformation sheet is connected with the mounting cavity, and the other end of the temperature sensing deformation sheet is provided with a moving contact;

the electric heating body is arranged in the mounting cavity, and two ends of the electric heating body are respectively connected with the first conductor and the temperature sensing deformation sheet; the middle section of the electric heating body is arranged above the middle section of the temperature sensing deformation sheet;

the sliding block slides in the mounting cavity along a horizontal straight line; the sliding block is provided with a manual block extending to the outer side of the insulating shell; the sliding block is also provided with an isolation section;

the spring is arranged between the sliding block and the inner wall of the mounting cavity;

when the temperature is low, the end part of the temperature sensing deformation sheet is downwards folded, the static contact is attached to the moving contact, the isolation section is attached to the side surface of the static contact, and the spring is in a compressed state;

when the temperature is high, the end part of the temperature sensing deformation sheet turns upwards, the static contact is separated from the moving contact, and the spring pushes the sliding block to move so that the isolation section enters between the static contact and the moving contact.

Furthermore, a first mounting hole and a second mounting hole which are vertically communicated are formed in the bottom of the insulating shell; the first conductor is disposed within the first mounting hole and the second conductor is disposed within the second mounting hole.

Further, riveting bosses are arranged on the first conductor and the second conductor.

Furthermore, the end parts of the first conductor and the second conductor extending to the outer side are respectively provided with two V-shaped grooves which are spaced from each other.

Further, the device also comprises a mounting piece and an adjusting screw; the mounting piece comprises a horizontal section and a vertical section, the end part of the temperature sensing deformation sheet is fixedly connected with the horizontal section, and the vertical section is fixedly connected with the insulating shell; the bottom of the insulating shell is provided with a threaded through hole, the adjusting screw is screwed into the threaded through hole, and the end part of the adjusting screw abuts against the bottom surface of the horizontal section.

Furthermore, a third vertically-through mounting hole is formed in the bottom of the insulating shell, the vertical section is arranged in the third mounting hole, and the bottom end of the vertical section extends to the outer side of the insulating shell; vertical section bottom sets up the joint strip, the both ends of joint strip extend along the horizontal direction.

Furthermore, a limiting groove is formed in the bottom of the insulating shell, and the spring is arranged in the limiting groove; the slider bottom is provided with and stretches into stopper in the spacing groove, the stopper supports the one end of spring.

Furthermore, the isolation section is provided with an inclined surface, so that the thickness of the isolation section is gradually reduced towards the moving contact.

Further, the insulating casing includes bottom plate and epitheca, the epitheca sets up downwardly opening's cell structure, the bottom plate with the epitheca is connected and shutoff the opening of cell structure.

Through the technical scheme of the utility model, can realize following technological effect:

according to the protector, the heating wire is additionally arranged in the insulating shell, and the heating wire is directly aligned to the middle section of the temperature sensing deformation sheet, so that when current in a circuit is overloaded, the heating wire can directly heat the ambient temperature near the temperature sensing deformation sheet, the process that heat is transferred from the outer side of the shell to the inner side of the shell is avoided, and the sensitivity of the protector in the action of circuit breaking protection is effectively improved; after this protector triggers the protection of breaking a circuit, the isolation section can stretch into between movable contact and the stationary contact, need just make the protector switch-on again through the manual mode with isolating the section and remove to make the protector can continuously maintain the protection state that breaks a circuit through isolating the section.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a component exploded view of a manual reset overload protector according to the present invention;

fig. 2 is a front sectional view (on state) of the manual reset overload protector of the present invention;

fig. 3 is a side sectional view (on state) of the manual reset overload protector of the present invention;

fig. 4 is a front sectional view (open circuit state) of the manual reset overload protector of the present invention;

fig. 5 is a side sectional view (open circuit state) of the manual reset overload protector of the present invention;

fig. 6 is a schematic structural view of the insulating housing of the present invention;

fig. 7 is a schematic structural view of the sliding block of the present invention;

FIG. 8 is a schematic structural view of a temperature-sensitive deformable sheet and an installation member according to the present invention;

reference numerals: 1. an insulating housing; 1a, a bottom plate; 1b, an upper shell; 11. a mounting cavity; 12. a first mounting hole; 13. a second mounting hole; 14. a third mounting hole; 15. a limiting groove; 2. a first conductor; 3. a second conductor; 31. static contact; 4. a temperature sensitive deformation sheet; 41. a moving contact; 5. an electric heating body; 6. a slider; 61. a manual block; 62. an isolation section; 63. a limiting block; 64. a bevel; 7. a spring; 8. a mounting member; 81. a horizontal segment; 82. a vertical section; 83. a clamping strip; 9. and adjusting the screw.

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.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are directions or positional relationships indicated on the basis of the drawings, and are only for convenience of description and simplification of the description, but not for indication or suggestion that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and thus, cannot be understood as limitations of the present invention.

A manual reset overload protector is shown in figures 1 to 8 and comprises:

the insulating shell 1 is internally provided with a mounting cavity 11;

the first conductor 2 is arranged on the insulating shell 1, and two ends of the first conductor respectively extend into the installation cavity 11 and the outside of the insulating shell 1;

the second conductor 3 is arranged on the insulating shell 1, is separated from the first conductor 2, and has two ends respectively extending into the installation cavity 11 and the outside of the insulating shell 1; one end of the second conductor 3, which is positioned in the mounting cavity 11, is riveted with a static contact 31;

one end of the temperature sensing deformation sheet 4 is connected with the mounting cavity 11, and the other end is provided with a movable contact 41; the temperature sensing deformation sheet 4 is a bimetallic strip structure in the prior art, and is a structure formed by stacking two metals made of different materials, wherein the two metals have different thermal expansion coefficients, and when the temperature rises, the two metals expand to different degrees, so that the whole bimetallic strip deforms; after the bimetallic strip is manufactured, a threshold value is generated according to the specific materials of two metals of the bimetallic strip, and when the temperature is lower than the threshold value, the bimetallic strip can form a shape; when the temperature is higher than the threshold value, the bimetallic strip can form another shape; the specific structure and principle are the prior art, and are not described herein in detail;

an electric heating element 5 which generates heat when energized; the electric heating body 5 is arranged in the mounting cavity 11, and two ends of the electric heating body are respectively connected with the first conductor 2 and the temperature sensing deformation sheet 4; the middle section of the electric heating body 5 is arranged above the middle section of the temperature sensing deformation sheet 4;

the sliding block 6 slides horizontally and linearly in the direction close to and far away from the interval between the movable contact and the fixed contact in the mounting cavity 11; the sliding block 6 is provided with a manual block 61 extending to the outer side of the insulating shell 1; the slide block 6 is also provided with an isolation section 62;

and the spring 7 is arranged between the sliding block 6 and the inner wall of the mounting cavity 11.

The specific working principle of the protector is as follows: the protector is connected into a circuit through the part of the first conductor 2 and the second conductor 3 extending to the outer side of the insulating shell 1;

when the circuit is in a normal working state, the heat generated by the electric heating element 5 is low, so that the temperature inside the protector is lower than the threshold value of the temperature sensing deformation sheet 4, at this time, as shown in fig. 2 to 3, the end of the temperature sensing deformation sheet 4 is turned over downwards, so that the static contact 31 is attached to the movable contact 41, and then the current can be conducted through the paths of the first conductor 2, the electric heating element 5, the temperature sensing deformation sheet 4, the movable contact 41, the static contact 31 and the second conductor 3, so that the protector is in a conducting state, and at this time, the isolation section 62 is attached to the side surface of the static contact 31, and the spring 7 is in a compressed state, the spring 7 can generate a force pushing the slider 6 towards the direction of the movable contact 41, but the slider 6 cannot move due to the limitation of the side surface of the movable contact 41;

when a circuit is overloaded and current is increased, the heat productivity is increased due to the increase of the current passing through the electric heating body 5, so that the temperature inside the protector is lower than the threshold value of the temperature sensing deformation sheet 4, at this time, as shown in fig. 4 to 5, the end part of the temperature sensing deformation sheet 4 is turned upwards, the fixed contact 31 and the movable contact 41 are separated to break the circuit, and thus the circuit breaking protection function of the protector is realized, and at this time, the movable contact 41 is moved upwards and cannot be limited any more, so that the spring 7 can push the sliding block 6 to move to enable the isolation section 62 to enter between the fixed contact 31 and the movable contact 41, and even if the temperature is reduced, the movable contact 41 and the fixed contact 31 cannot be attached to each other; after completely solving the source of the overload hidden trouble, manually operating the manual block 61 to move the slider 6, pushing the isolation section 62 out of between the moving contact 41 and the static contact 31, so that the protector returns to the state shown in fig. 2 to 3, the moving contact 41 and the static contact 31 are contacted again to conduct the circuit, and the side surface of the moving contact 41 props against the isolation section 62 again.

In order to improve the production efficiency of the protector, it is generally preferable to mount the first conductor 2 and the second conductor 3 in a riveted manner, and the specific structure is as follows: as shown in fig. 6, a first mounting hole 12 and a second mounting hole 13 which vertically penetrate through are arranged at the bottom of the insulating shell 1; the first conductor 2 is disposed in the first mounting hole 12 and the second conductor 3 is disposed in the second mounting hole 13, thereby eliminating conventional screws and the like. Preferably on first conductor 2 and second conductor 3 set up the riveting boss, the riveting boss will correspond the position and thicken, make the position that has the riveting boss can produce interference fit with first mounting hole 12, second mounting hole 13, make first conductor 2 and second conductor 3 install more firmly. Preferably, two V-shaped grooves are formed on the end portions of the first conductor 2 and the second conductor 3 extending to the outside, so that the end portions of the first conductor 2 and the second conductor 3 form a fork-shaped structure, and the first conductor 2 and the second conductor 3 can be further fixed by deforming both sides of the fork-shaped structure, thereby preventing the first conductor 2 and the second conductor 3 from falling off.

For the installation of the temperature sensing deformation sheet 4, the protector is installed through a specially designed installation structure, and the installation structure specifically comprises an installation part 8 and an adjusting screw 9; the mounting part 8 comprises a horizontal section 81 and a vertical section 82, the end part of the temperature sensing deformation sheet 4 is riveted with the horizontal section 81, and the vertical section 82 is fixedly connected with the insulating shell 1; the bottom of the insulating shell 1 is provided with a threaded through hole, the adjusting screw 9 is screwed into the threaded through hole, and the end part of the adjusting screw 9 abuts against the bottom surface of the horizontal section 81. Under the structure, the height and the inclination of the horizontal section 81 can be adjusted by adjusting the screwing-in depth of the adjusting screw 9, so that the accumulated error generated in the manufacturing process is eliminated, and the reliability of the contact between the movable contact 41 and the static contact 31 is ensured.

Preferably, the mounting member 8 is also mounted by riveting, and the specific implementation form is as follows: a third vertically-through mounting hole 14 is formed in the bottom of the insulating shell 1, a vertical section 82 is arranged in the third mounting hole 14, and the bottom end of the vertical section 82 extends to the outer side of the insulating shell 1; the bottom end of the vertical section 82 is provided with a snap-in strip 83, as shown in fig. 8, and both ends of the snap-in strip 83 extend along the horizontal direction. During installation, firstly, the two ends of the clamping strip 83 are flush with the middle section, after the bottom end of the vertical section 82 penetrates out of the third installation hole 14, the two ends of the clamping strip 83 are bent by a certain angle, and therefore the two ends of the clamping strip 83 abut against the bottom surface of the outer side of the insulating shell 1 to complete riveting of the installation piece 8.

Preferably, a limiting groove 15 is formed in the bottom of the insulating shell 1, and the spring 7 is arranged in the limiting groove 15; the bottom of the sliding block 6 is provided with a limiting block 63 extending into the limiting groove 15, and the limiting block 63 abuts against one end of the spring 7. Above-mentioned structure can prevent effectively that spring 7 from producing crooked to guarantee spring 7 and promote the reliability of this protector work to slider 6's impetus.

Preferably, the isolation segment 62 is provided with an inclined surface 64, as shown in fig. 7, so that the thickness of the isolation segment 62 is gradually reduced along a direction toward the movable contact 41, thereby ensuring that the isolation segment 62 can rapidly and smoothly slide between the movable contact 41 and the stationary contact 31.

In order to further facilitate the installation of the protector, it is preferable that the insulating housing 1 is separately arranged, the insulating housing 1 is separated into a bottom plate 1a and an upper shell 1b, the upper shell 1b is provided with a groove structure with a downward opening, the bottom plate 1a is connected with the upper shell 1b in a body manner and blocks the opening of the groove structure, and then all the components can be installed on the bottom plate 1a, and the upper shell 1b for protection is installed after the installation is completed.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A manual reset overload protector, comprising:

the insulation shell (1) is internally provided with a mounting cavity (11);

the first conductor (2) is installed on the insulating shell (1), and two ends of the first conductor respectively extend into the installation cavity (11) and outside the insulating shell (1);

the second conductor (3) is arranged on the insulating shell (1) and is separated from the first conductor (2), and two ends of the second conductor respectively extend into the installation cavity (11) and the outside of the insulating shell (1); one end of the second conductor (3) positioned in the mounting cavity (11) is provided with a static contact (31);

one end of the temperature sensing deformation sheet (4) is connected with the mounting cavity (11), and the other end is provided with a moving contact (41);

the electric heating body (5) is arranged in the mounting cavity (11), and two ends of the electric heating body are respectively connected with the first conductor (2) and the temperature sensing deformation sheet (4); the middle section of the electric heating body (5) is arranged above the middle section of the temperature sensing deformation sheet (4);

the sliding block (6) slides in the installation cavity (11) along a horizontal straight line; the sliding block (6) is provided with a manual block (61) extending to the outer side of the insulating shell (1); the sliding block (6) is also provided with an isolation section (62);

the spring (7) is arranged between the sliding block (6) and the inner wall of the mounting cavity (11);

when the temperature is low, the end part of the temperature sensing deformation sheet (4) is downwards folded, the static contact (31) is attached to the moving contact (41), the isolation section (62) is attached to the side surface of the static contact (31), and the spring (7) is in a compressed state;

when the temperature is high, the end part of the temperature sensing deformation sheet (4) is turned upwards, the static contact (31) is separated from the moving contact (41), and the spring (7) pushes the sliding block (6) to move so that the isolation section (62) enters between the static contact (31) and the moving contact (41).

2. The manual reset overload protector according to claim 1, wherein a first mounting hole (12) and a second mounting hole (13) which vertically penetrate through are formed in the bottom of the insulating shell (1); the first conductor (2) is disposed in the first mounting hole (12), and the second conductor (3) is disposed in the second mounting hole (13).

3. A manual reset overload protector according to claim 2, characterised in that riveted bosses are provided on the first conductor (2) and the second conductor (3).

4. A manual reset overload protector according to claim 2, characterised in that the ends of the first conductor (2) and the second conductor (3) extending to the outside are each provided with two V-grooves spaced from each other.

5. A manual reset overload protector according to claim 1, further comprising a mounting member (8) and an adjustment screw (9); the mounting piece (8) comprises a horizontal section (81) and a vertical section (82), the end part of the temperature sensing deformation sheet (4) is fixedly connected with the horizontal section (81), and the vertical section (82) is fixedly connected with the insulating shell (1); the bottom of the insulating shell (1) is provided with a threaded through hole, the adjusting screw (9) is screwed into the threaded through hole, and the end part of the adjusting screw (9) abuts against the bottom surface of the horizontal section (81).

6. The manual reset overload protector according to claim 5, wherein a third mounting hole (14) is vertically arranged at the bottom of the insulating shell (1), the vertical section (82) is arranged in the third mounting hole (14), and the bottom end of the vertical section (82) extends to the outside of the insulating shell (1); the bottom end of the vertical section (82) is provided with a clamping strip (83), and two ends of the clamping strip (83) extend along the horizontal direction.

7. The manual reset overload protector according to claim 1, characterized in that a limiting groove (15) is arranged at the bottom of the insulating shell (1), and the spring (7) is arranged in the limiting groove (15); slider (6) bottom is provided with and stretches into stopper (63) in spacing groove (15), stopper (63) support the one end of spring (7).

8. The manual reset overload protector of claim 1, wherein the isolation segment (62) is provided with a slope (64) such that the thickness of the isolation segment (62) gradually decreases toward the movable contact (41).

9. The manual reset overload protector according to any one of claims 1 to 8, wherein the insulating shell (1) comprises a bottom plate (1 a) and an upper shell (1 b), the upper shell (1 b) is provided with a groove structure which is open downwards, and the bottom plate (1 a) is connected with the upper shell (1 b) in a body manner and blocks an opening of the groove structure.

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