CN220895413U - Current overload protector - Google Patents

Abstract

The utility model discloses a current overload protector, which belongs to the technical field of overload protectors, and comprises a base and a cover plate, wherein the cover plate is fixed on one side of the base through screws, a mounting groove is formed in the base, a static terminal and a movable terminal are connected in a clamping manner in the mounting groove, the bottom ends of the static terminal and the movable terminal extend to the outside of the base, a static contact is arranged at the top of one end of the static terminal, which is positioned in the mounting groove, and the static contact can be made of traditional copper material, and the top surface is made of a bevel structure, so that the diversion can be increased, the resistance value can be reduced, the conductivity can be obviously improved, larger current can be borne, and meanwhile, a heat-resistant metal block is additionally arranged at the bottom of a button, so that the button can bear higher temperature, the damage of a switch assembly can be avoided, the use stability of the switch assembly can be greatly improved, and the use cost can be reduced.

Description

Current overload protector

Technical Field

The utility model relates to the technical field of overload protectors, in particular to a current overload protector.

Background

The overload protector is a common circuit protection device, is commonly used for conducting circuit breaking protection when an electric appliance is overloaded, so as to avoid burning out of the circuit, and can be widely applied to protection and monitoring of industrial three-phase motors and other electric appliances in the mechanical, metallurgical, building material, chemical and textile industries.

Based on the above, the present inventors found that: the contacts of the traditional overload protector are mostly made of metal copper, the conductivity of the traditional overload protector is often poor, larger current cannot be born, meanwhile, when the traditional overload protector resets, the reset switch is often in direct contact with a metal sheet, the damage of the reset switch can be caused by long-time use due to the fact that the temperature of the metal sheet passing through the current is higher, and the use cost is increased.

Disclosure of utility model

1. Technical problem to be solved

Aiming at the problems existing in the prior art, the utility model aims to provide a current overload protector, which can change a traditional static contact made of copper into a metal silver material, and set the top surface into an inclined surface structure, so that the current guiding can be increased, the resistance value can be reduced, the conductivity of the current overload protector can be obviously improved, larger current can be born, meanwhile, a heat-resistant metal block is additionally arranged at the bottom of a button, the button can bear higher temperature, the damage of a switch assembly is avoided, the use stability of the current overload protector is greatly improved, and the use cost is reduced.

2. Technical proposal

In order to solve the problems, the utility model adopts the following technical scheme.

The utility model provides a current overload protector, includes base and apron, the apron passes through the screw fixation in one side of base, the inside mounting groove that is provided with of base, the inside block of mounting groove is connected with quiet terminal and movable terminal, and the bottom of quiet terminal and movable terminal extends to the outside of base, quiet terminal is located the one end top of mounting groove and is provided with stationary contact, movable terminal is located the one end top fixed mounting of mounting groove has bimetallic strip, the bottom of bimetallic strip is provided with movable contact, movable contact's bottom surface and stationary contact top surface contact connection, the guiding hole has been seted up at the top of base, be provided with switch assembly in the guiding hole, and switch assembly is located directly over the bimetallic strip, bimetallic strip keeps away from and is provided with spacing subassembly between one end of movable terminal and the mounting groove one side inner wall.

Further, the switch assembly comprises a button which is connected to the inner side of the guide hole in a sliding mode, the top of the button extends to the outside of the base, the bottom of the button extends to the inside of the mounting groove, a pin is inserted into the bottom of the button, and a reset spring is fixedly installed between the pin and the top wall of the mounting groove.

Further, the limiting assembly comprises an adjusting screw, the adjusting screw is fixedly arranged on the inner wall of one side of the mounting groove, and a U-shaped ring is fixedly arranged at the top end of the adjusting screw.

Further, a limit hole is formed in one end, away from the movable terminal, of the bimetallic strip, and the limit hole is connected with one end of the U-shaped ring in a clamping mode.

Further, the stationary contact and the movable contact are made of metal silver.

Further, the top of the stationary contact is of an inclined plane structure.

Further, the pin is of a heat-resistant metal block structure.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that: according to the scheme, the fixed contact made of the traditional copper is replaced by the metallic silver, the top surface is set to be of an inclined surface structure, so that the flow guide can be increased, the resistance value is reduced, the conductivity of the fixed contact can be obviously improved, larger current can be born, meanwhile, the bottom of the button is additionally provided with the heat-resistant metal block, the button can bear higher temperature, the damage of the switch assembly is avoided, the use stability of the switch assembly is greatly improved, and the use cost is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of the internal structure of the present utility model;

FIG. 3 is a schematic view of a split structure of the present utility model;

fig. 4 is a schematic view of a static terminal position structure according to the present utility model.

The reference numerals in the figures illustrate:

1. A base; 11. a guide hole;

2. A cover plate;

3. a mounting groove;

4. a static terminal;

5. A movable terminal;

6. A stationary contact;

7. bimetallic strips; 71. a limiting hole;

8. A movable contact;

9. a switch assembly; 91. a button; 92. a pin; 93. a return spring;

10. A limit component; 101. an adjusting screw; 102. a U-shaped ring.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.

Examples:

Referring to fig. 1-4, a current overload protector includes a base 1 and a cover plate 2, the cover plate 2 is fixed on one side of the base 1 by a screw, a mounting groove 3 is provided in the base 1, a static terminal 4 and a movable terminal 5 are connected in a clamping manner in the mounting groove 3, the bottom ends of the static terminal 4 and the movable terminal 5 extend to the outside of the base 1, a static contact 6 is provided at the top of one end of the static terminal 4 in the mounting groove 3, a bimetal 7 is fixedly mounted at the top of one end of the movable terminal 5 in the mounting groove 3, a movable contact 8 is provided at the bottom of the bimetal 7, the bottom surface of the movable contact 8 is in contact connection with the top surface of the static contact 6, a guide hole 11 is provided at the top of the base 1, a switch assembly 9 is provided in the guide hole 11, the switch assembly 9 is located right above the bimetal 7, and a limit assembly 10 is provided between one end of the bimetal 7 away from the movable terminal 5 and one side inner wall of the mounting groove 3.

Referring to fig. 3, the switch assembly 9 includes a button 91 slidably connected to the inner side of the guide hole 11, the top of the button 91 extends to the outside of the base 1, the bottom of the button 91 extends to the inside of the mounting groove 3, a pin 92 is inserted at the bottom of the button 91, a return spring 93 is fixedly installed between the pin 92 and the top wall of the mounting groove 3, and when in use, after the button 91 is pressed, the return spring 93 can be reset in time by means of elastic force generated by deformation of the return spring 93.

Referring to fig. 3, the limiting assembly 10 includes an adjusting screw 101, the adjusting screw 101 is fixedly mounted on an inner wall of one side of the mounting groove 3, a U-shaped ring 102 is fixedly mounted on the top end of the adjusting screw 101, when in use, the U-shaped ring 102 is made of elastic material, and when the movable contact 8 contacts with the stationary contact 6, the bimetal 7 can be extruded and limited by using elastic force generated by the U-shaped ring 102, so that normal passing of current is ensured.

Referring to fig. 3, a limiting hole 71 is formed at one end of the bimetal 7 away from the movable terminal 5, and the limiting hole 71 is connected with one end of the U-shaped ring 102 in a clamping manner.

Referring to fig. 3, the stationary contact 6 and the movable contact 8 are made of metallic silver, so that the resistance value can be reduced, the conductivity can be obviously improved, and larger current can be borne.

Referring to fig. 4, the top of the stationary contact 6 has a slope structure, which can increase the flow guide.

Referring to fig. 3, the pin 92 is a heat-resistant metal block structure, which can enhance the heat resistance of the button 91 and prevent the button 91 from being damaged due to long-term use.

When in use: after the movable contact 8 contacts the fixed contact 6, the bimetallic strip 7 can be extruded and limited by utilizing the elastic force generated by the U-shaped ring 102, so that the normal passing of current is ensured, wherein the top surface of the fixed contact 6 is provided with an inclined surface structure, so that the diversion can be increased, the resistance value is reduced, the conductivity of the fixed contact 6 can be obviously improved, larger current can be born, when the current loaded between the fixed contact 6 and the movable contact 8 is overlarge, the temperature of the movable contact 8 and the bimetallic strip 7 can be increased, the bimetallic strip 7 is deformed, the U-shaped ring 102 gradually extrudes the bimetallic strip 7 until the movable contact 8 and the fixed contact 6 are separated, the current is disconnected, the protection effect is realized on an electric appliance, when the temperature of the bimetallic strip 7 is reduced, the button 91 is pressed downwards, the bimetallic strip 7 can be bent downwards, the fixed contact 6 and the movable contact 8 are contacted again, and in the pressing process, the button 91 can bear higher temperature through additionally arranging the pins 92 of a heat-resistant metal block structure, so that the damage of the switch assembly 9 is avoided, the use stability is greatly improved, and the use cost is reduced.

Finally, it should be noted that: in the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The above description is only of the preferred embodiments of the present utility model; the scope of the utility model is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present utility model, and the technical solution and the improvement thereof are all covered by the protection scope of the present utility model.

Claims (7)

1. The utility model provides a current overload protector, includes base (1) and apron (2), its characterized in that: cover plate (2) are fixed in one side of base (1) through the screw, base (1) inside is provided with mounting groove (3), inside block in mounting groove (3) is connected with quiet terminal (4) and movable terminal (5), and the bottom of quiet terminal (4) and movable terminal (5) extends to the outside of base (1), quiet terminal (4) are located one end top in mounting groove (3) and are provided with stationary contact (6), one end top fixed mounting that movable terminal (5) is located mounting groove (3) has bimetallic strip (7), the bottom of bimetallic strip (7) is provided with movable contact (8), the bottom surface and the top surface contact of stationary contact (6) of movable contact (8) are connected, guiding hole (11) have been seted up at the top of base (1), be provided with switch module (9) in guiding hole (11), and switch module (9) are located bimetallic strip (7) directly over, bimetallic strip (7) keep away from between one end and one side inner wall (3) of movable terminal (5) and mounting groove (10).

2. A current overload protector according to claim 1 wherein: the switch assembly (9) comprises a button (91) which is connected to the inner side of the guide hole (11) in a sliding mode, the top of the button (91) extends to the outside of the base (1), the bottom of the button (91) extends into the mounting groove (3), a pin (92) is inserted into the bottom of the button (91), and a reset spring (93) is fixedly installed between the pin (92) and the top wall of the mounting groove (3).

3. A current overload protector according to claim 1 wherein: the limiting assembly (10) comprises an adjusting screw (101), the adjusting screw (101) is fixedly arranged on the inner wall of one side of the mounting groove (3), and a U-shaped ring (102) is fixedly arranged at the top end of the adjusting screw (101).

4. A current overload protector according to claim 1 wherein: and a limiting hole (71) is formed in one end, far away from the movable terminal (5), of the bimetallic strip (7), and the limiting hole (71) is connected with one end of the U-shaped ring (102) in a clamping mode.

5. A current overload protector according to claim 1 wherein: the stationary contact (6) and the movable contact (8) are made of metal silver.

6. A current overload protector according to claim 1 wherein: the top of the stationary contact (6) is of an inclined plane structure.

7. A current overload protector according to claim 2 wherein: the pin (92) is of a heat-resistant metal block structure.