CN220856451U - Household contactor - Google Patents

Abstract

The utility model discloses a household contactor, wherein an electromagnetic driving module and a contact module are arranged in a shell of the household contactor, the electromagnetic driving module comprises a coil framework and an electromagnetic coil, a static iron core and a movable iron core are arranged on the coil framework, the electromagnetic coil is electrically connected with a circuit board, the contact module comprises a static contact and a movable contact arranged below the static contact, the movable contact is driven by the iron core to be contacted and separated from the static contact, a connecting pin and a rectifier bridge stack are arranged on the circuit board, the connecting pin is electrically connected with an alternating current power supply, an input end and an output end are arranged on the rectifier bridge stack, the input end receives the alternating current power supply transmitted by the connecting pin, and after alternating current is converted into direct current in the rectifier bridge stack, the converted direct current is transmitted to the electromagnetic coil by the output end. The electromagnetic coil is connected with direct current, generates less heat in the running process, reduces the power consumption and heat in the running process, and is more stable and reliable.

Description

Household contactor

Technical Field

The utility model belongs to the technical field of contactors, and particularly relates to a household contactor.

Background

The contactor is an electric appliance which uses current to flow through a coil to generate a magnetic field in industrial electricity so as to close a contact, thereby achieving the purpose of controlling a load, has a low-voltage release protection function, is suitable for frequent operation and remote control, and is one of important elements in an automatic control system. According to the different application fields, the contactor is divided into a household contactor and an industrial contactor, wherein the household contactor is mainly used for an electric power system with alternating current of 50Hz and rated working voltage of up to 400V, and is widely used for occasions such as illumination, heating, ventilation and the like.

The patent document with the bulletin number of CN 217690993U discloses a high-reliability alternating current-direct current contactor, which comprises a base, an upper cover, an electromagnetic component, a contact support, a moving contact and a fixed contact, wherein the electromagnetic component comprises a coil framework, a coil, a fixed iron core and a moving iron core, the moving iron core is provided with a lug matched with the contact support, the contact support is provided with a groove matched with the lug, the lug is abutted in the groove, the lug is provided with a driving shaft in a linkage way, two ends of the corresponding driving shaft on the contact support are respectively provided with a supporting plate, the supporting plates are provided with clamping holes, and two ends of the driving shaft are respectively inserted in the clamping holes of the two supporting plates and form linkage cooperation of the driving shaft and the contact support. The device has the advantages of simple structure, stable and reliable performance and convenient assembly.

However, in the above patent document and the existing household contactor, the coil is directly connected to the household ac, and then the coil controls the moving iron core to move, and the following problems occur in the operation process of the coil: the noise is larger, and the interference is generated to the user; more power consumption and loss are generated, and the use cost of the contactor is increased; the power consumption required by operation is increased, the heating value near the coil is improved, and the normal operation of the contactor is easily influenced.

Disclosure of Invention

Aiming at a plurality of problems existing in the existing household contactor, which is characterized in that an upper coil is directly connected with alternating current, the following utility model is provided:

The utility model provides a domestic contactor, includes the casing, be equipped with electromagnetic drive module and contact module in the casing, electromagnetic drive module includes coil skeleton, locates solenoid on the coil skeleton, sets up on the coil skeleton quiet iron core, the movable iron core that matches with quiet iron core activity, contact module is including locating the static contact on the casing and locating the movable contact of static contact below, the movable contact is driven by the iron core and is contacted or separate with the static contact, the circuit board that solenoid is connected mutually, be equipped with connecting pin and rectifier bridge heap on the circuit board, the connecting pin is connected with alternating current power supply is electric, be equipped with input and output on the rectifier bridge heap, the alternating current power supply of connecting pin transport is accepted to the input, converts alternating current into the direct current in the rectifier bridge heap after, carries the direct current after the conversion to electromagnetic coil through the circuit board by the output.

Furthermore, the rectifier bridge stack is an MB10F type bridge stack, is an ultrathin patch rectifier bridge stack, and is particularly suitable for a small circuit board.

Further, a power chip electrically connected with the electromagnetic coil is further arranged on the circuit board, and an over-temperature protection program is integrated inside the power chip so as to reduce the temperature rise of the electromagnetic coil.

Furthermore, the power supply chip is an FT 8440E-type chip and comprises a special current mode PWM controller and a high-voltage power switch tube, and various protection programs such as VCC under-voltage protection, VCC overvoltage protection, over-temperature protection, cycle-by-cycle overcurrent protection, output short-circuit protection and the like are integrated in the FT 8440E-type chip, so that the stability and the reliability of the electromagnetic coil in the running process are improved.

Further, the coil framework is provided with a through hole which penetrates through, the electromagnetic coil is wound on the coil framework, and the middle parts of the movable iron core and the static iron core are provided with convex blocks which are inserted into the through holes.

Further, the contact module further comprises a contact seat fixedly connected with the movable iron core, a slot for inserting the movable contact is formed in the contact seat, and a contact spring with two ends respectively propped against the contact seat and the movable contact is arranged in the slot so as to prevent the movable contact from moving excessively in the upward moving process.

Further, the movable iron core is provided with connecting shafts protruding towards two sides, two sides of the contact base are provided with connecting arms, and grooves clamped with the connecting shafts are formed in the connecting arms.

Further, the contactor also comprises an indicating piece, wherein an indicating part, a matching claw in transmission connection with the connecting shaft and a movable column connected with the shell are arranged on the indicating piece, after the movable iron core is matched with the static iron core, the indicating piece is driven to rotate by the connecting shaft, and the indicating part enters the lower part of an indicating window at the top of the shell to display that the contactor works.

Further, the matching part of the movable iron core and the static iron core is provided with an inclined plane, and the contact area between the movable iron core and the static iron core is increased by the inclined plane, so that the heat dissipation efficiency of the movable iron core and the static iron core is improved.

Further, a connecting sheet is arranged in the shell, and two ends of the connecting sheet are respectively and electrically connected with the alternating current power supply and the connecting pins.

Advantageous effects

The utility model provides a household contactor, a circuit board for connecting an electromagnetic coil and an alternating current power supply is arranged between the electromagnetic coil and the alternating current power supply, a connecting pin and a rectifier bridge stack are arranged on the circuit board, the alternating current power supply is electrically connected with the input end of the rectifier bridge stack, the rectifier bridge stack converts alternating current into direct current, the direct current is input to the circuit board from the input end of the rectifier bridge stack, and finally the circuit board conveys the direct current to the electromagnetic coil. The electromagnetic coil is driven by direct current to work, so that the noise is low in the running process, the power consumption and the heat required by the coil are reduced, and the stability and the reliability of the contactor are improved.

Drawings

FIG. 1 is a schematic view of the internal structure of a household contactor according to the present utility model;

FIG. 2 is a schematic diagram showing the internal structure of a household contactor according to the present utility model;

FIG. 3 is a schematic perspective view of a household contactor according to the present utility model;

fig. 4 is a schematic perspective view of a circuit board according to the present utility model;

fig. 5 is a schematic perspective view of a contact base according to the present utility model;

fig. 6 is a schematic circuit diagram of a circuit board according to the present utility model.

The correspondence between the reference numerals and the component names in the drawings is as follows:

1. A housing; 2. an electromagnetic drive module; 3. a circuit board; 4. a contact module; 5. a contact base; 6. an indicator; 11. an upper cover; 12. a base; 13. an indication window; 21. a coil bobbin; 22. an electromagnetic coil; 23. a stationary core; 24. a movable iron core; 25. a connecting sheet; 31. a connecting pin; 32. a rectifier bridge stack; 41. a moving contact; 42. a contact spring; 43. a stationary contact; 44. a connecting shaft; 45. an inclined plane; 51. a connecting arm; 52. a groove; 53. a slot; 61. an instruction unit; 62. a mating claw; 63. a movable column.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described in the following examples.

It will be apparent that the described embodiments are merely some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

In addition to the above terms may be used to denote orientation or positional relationships, other meanings may be used, such as the term "upper" may also be used in some cases to denote some sort of attachment or connection. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1-5, which are a preferred embodiment of the present utility model, a household contactor comprises a housing 1, wherein the housing 1 comprises a base 12 and an upper cover 11 arranged on the base 12, an electromagnetic driving module 2, a contact module 4 and a circuit board 3 are arranged in the base 12, the electromagnetic driving module 2 comprises a coil frame 21, an electromagnetic coil 22, a static iron core 23 and a movable iron core 24, the electromagnetic coil 22 is wound on the coil frame 21, a through hole penetrating the coil frame 21 is arranged, and the static iron core 23 and the movable iron core 24 are both provided with projections inserted into the through hole so as to be respectively arranged at the top and the bottom of the coil frame 21, and after the electromagnetic coil 22 is connected with an alternating current power supply, the movable iron core 24 is driven to move upwards and contact and match with the static iron core 23 due to electromagnetic effect; the contact module 4 comprises a contact seat 5, a moving contact 41 and a fixed contact 43, the moving iron core 24 is fixedly connected with the contact seat 5, a slot 53 for inserting and installing the moving contact 41 is further arranged on the contact seat 5, the fixed contact 43 is fixedly arranged in the base 12 and is positioned above the moving contact 41, and after the moving iron core 24 moves upwards, the moving contact 41 is driven to contact with the fixed contact 43 so as to realize electric communication between the moving contact 41 and the fixed contact 43; the circuit board 3 is provided with two connection pins 31 and a rectifier bridge stack 32, the connection pins 31 are respectively and electrically connected with an L pole and an N pole of an alternating current power supply, the rectifier bridge stack 32 is provided with an input end and an output end, the input end is electrically connected with the connection pins 31 to connect the alternating current power supply into the rectifier bridge stack 32, the alternating current is converted into direct current in the rectifier bridge stack 32 and then is output to the circuit board 3 through the output end, and the circuit board 3 is electrically connected with the electromagnetic coil 22 to convey the converted direct current to the electromagnetic coil 22.

In this embodiment, the electromagnetic coil 22 is driven by the converted direct current, and compared with the electromagnetic coil 22 driven by the alternating current in the past, the utility model has lower noise in the working process, and simultaneously reduces the power consumption required by the household contactor in the running process, thereby saving the use cost on one hand, reducing the heating value of the accessories of the electromagnetic coil 22 on the other hand, and improving the reliability of the household contact in the running process.

The operation of the rectifier bridge 32 is further described below.

The rectifier bridge 32 is composed of four diodes which are arranged in a rectangular frame to form a bridge shape, and the principle is that alternating current signals input by two input ends are divided into two groups, then alternating current signals in the two groups are respectively converted into direct current signals of positive half wave and negative half wave through the two diodes, and finally, the two signals are added to obtain a complete direct current signal.

In this embodiment, the rectifier bridge 32 is an MB 10F-type bridge, specifically, the overall length of the MB 10F-type bridge is 4.7mm, the height is 1.5mm, the thickness is 0.6mm, the body width is 4.0mm, two pins are respectively disposed at two sides of the MB 10F-type bridge, the pin spacing is 2.5mm, the pin thickness is 0.25mm, as shown in fig. 6, two pins at one side of the bridge serve as input terminals, are respectively connected with the L pole and the N pole of an AC power source (i.e., AC in the drawing), then the AC power source is converted into dc power through the MB 10F-type rectifier bridge 32, and is delivered into the electromagnetic coil 22 (i.e., L1 in the drawing) through the pins serving as output terminals, and the remaining pin is grounded.

Further, a power chip electrically connected to the electromagnetic coil 22 is further disposed on the circuit board 3, as shown in fig. 6, in this embodiment, the power chip is an FT 8440E-type chip, and includes a special current mode PWM controller and a high voltage power switch tube, and an error amplifier built in the PWM controller is optimized to ensure good dynamic response, so that the FT 8440E-type chip can obtain stable high-precision output voltage within a full voltage input range, so as to improve the stability of operation of the electromagnetic coil 22.

In addition, programs such as VCC under-voltage protection (UVLO), VCC overvoltage protection (OVP), over-temperature protection (OTP), cycle-by-cycle over-current protection (OCP), output short-circuit protection (SCP) and the like are integrated in the FT8440E type chip, so that the electromagnetic coil 22 is completely protected, and meanwhile, the over-high temperature rise of the electromagnetic coil can be avoided, and the normal use is influenced.

In this embodiment, the movable iron core 24 is provided with a connecting shaft 44 protruding towards two sides, two sides of the contact seat 5 are provided with connecting arms 51, the connecting arms 51 are provided with grooves 52, and the grooves 52 are provided with openings expanding towards one side for the connecting shaft 44 to be clamped in. After the movable iron core 24 moves upwards, the connecting shaft 44 drives the contact 41 seat 5 to move upwards.

In this embodiment, a contact spring 42 with two ends respectively pressing against the contact seat 5 and the moving contact 41 is disposed in the slot 53, and the contact spring 42 prevents the moving contact 41 from moving excessively upward.

Further, an indicator 6 is further disposed in the base 12, an indicator 61, a matching claw 62 and a movable column 63 are disposed on the indicator 6, an indicator window 13 is disposed at the top of the upper cover 11, the matching claw 62 is in driving connection with the connecting shaft 44, the movable column 63 is movably connected to the side wall of the base 12, in the upward movement process of the movable iron core 24, the connecting shaft 44 drives the matching claw 62 to move upward, and the movable column 63 rotates and drives the indicator 61 to move below the indicator window 13 so as to display that the contactor is in operation.

In this embodiment, the matching portion between the movable iron core 24 and the static iron core 23 is provided with a matching inclined plane 45, wherein the inclined plane 45 on the movable iron core 24 is extended obliquely in an upward shrinkage manner, the static iron core 23 is extended obliquely in a downward expansion manner, and the contact area between the movable iron core 24 and the static iron core 23 is increased by the inclined plane 45, so as to reduce the temperature at the contact portion between the two.

In this embodiment, a connecting piece 25 is further disposed in the housing 1, one end of the connecting piece 25 is connected to an ac power supply, and the other end is soldered to the connecting pin 31.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a household contactor, includes casing (1), be equipped with electromagnetic drive module (2) and contact module (4) in casing (1), electromagnetic drive module (2) include coil skeleton (21), locate solenoid (22) on coil skeleton (21), set up on coil skeleton (21) quiet iron core (23), with quiet iron core (23) activity matched movable iron core (24), solenoid (22) have inserted alternating current power supply, contact module (4) are including locating fixed contact (43) on casing (1) and locating moving contact (41) of fixed contact (43) below, moving contact (41) are driven in order to contact or separate with fixed contact (43) by moving iron core (24), its characterized in that: the electromagnetic rectifier is characterized by further comprising a circuit board (3) electrically connected with the electromagnetic coil (22), wherein the circuit board (3) is provided with a connecting pin (31) and a rectifier bridge stack (32), the connecting pin (31) is electrically connected with an alternating current power supply, the rectifier bridge stack (32) is provided with an input end and an output end, the input end receives the alternating current power supply transmitted by the connecting pin (31), and after alternating current is converted into direct current in the rectifier bridge stack (32), the converted direct current is transmitted to the electromagnetic coil (22) through the circuit board (3) by the output end.

2. A household contactor according to claim 1, wherein: the rectifier bridge (32) is an MB10F type bridge.

3. A household contactor according to claim 2, wherein: and a power chip electrically connected with the electromagnetic coil (22) is further arranged on the circuit board (3), and an over-temperature protection program is integrated in the power chip to reduce the temperature rise of the electromagnetic coil (22).

4. A household contactor according to claim 3, wherein: the power chip is an FT8440E type chip.

5. A household contactor according to claim 2, wherein: the coil framework (21) is provided with a through hole which penetrates through, the electromagnetic coil (22) is wound on the coil framework (21), and the middle parts of the movable iron core (24) and the static iron core (23) are provided with protruding blocks which are inserted into the through holes.

6. A household contactor according to claim 2, wherein: the contact module (4) further comprises a contact seat (5) fixedly connected with the movable iron core (24), a slot (53) for inserting the movable contact (41) is formed in the contact seat (5), and a contact spring (42) with two ends respectively propped against the contact seat (5) and the movable contact (41) is arranged in the slot (53).

7. The household contactor according to claim 6, wherein: the movable iron core (24) is provided with a connecting shaft (44) protruding towards two sides, two sides of the contact seat (5) are provided with connecting arms (51), and the connecting arms (51) are provided with grooves (52) clamped with the connecting shaft (44).

8. A household contactor according to claim 1, wherein: the contactor is characterized by further comprising an indicator (6), wherein an indicator part (61), a matching claw (62) in transmission connection with the connecting shaft (44) and a movable column (63) connected with the shell (1) are arranged on the indicator (6), the indicator (6) is driven to rotate by the connecting shaft (44) after the movable iron core (24) is matched with the static iron core (23), and the indicator part (61) enters the lower part of an indicator window (13) at the top of the shell (1) to display the working condition of the contactor.

9. A household contactor according to claim 1, wherein: the contact part of the movable iron core (24) and the static iron core (23) is of a matched inclined plane (45) structure.

10. A household contactor according to claim 1, wherein: a connecting sheet (25) is further arranged in the shell (1), and two ends of the connecting sheet (25) are respectively and electrically connected with an alternating current power supply and a connecting pin (31).