Direct current contactor with integrated microswitch

Abstract

The utility model discloses a direct current contactor with an integrated microswitch. The direct current contactor comprises a base with a microswitch structure, an outer iron core, a support plate, a plastic support, an injection molding shaft and a coil. The outer iron core is U-shaped and is arranged on the top surface of the base; the cylindrical mounting cavity of the support plate is inserted into the outer iron core, and the support plate is erected on the top surface of the outer iron core; the injection molding shaft is arranged in the mounting cavity of the support plate, one end of the injection molding shaft extending out of the support plate is provided with a plastic support, and the plastic support is connected with a high-voltage moving contact through a spring; a coil is arranged outside the bracket plate mounting cavity; the four terminals are directly injection-molded on the base, so that the space utilization rate of a product can be improved, the high-low voltage insulation distance of the product is increased, the assembly stability of a product manufacturing process is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to a DC contactor with an integrated micro switch. Background Art

[0002] A DC contactor is a contactor whose core is controlled by a DC coil. Its load can be either DC or AC. However, the current DC contactor has the following disadvantages:

[0003] 1. Currently, DC contactors are not very safe and have a short lifespan;

[0004] 2. Products without high and low voltage isolation structure, small safety gap, poor reliability and safety;

[0005] 3. The original micro switch assembly has a complex structure and high assembly requirements. Several switches must be welded to the circuit board first, and then the circuit board is installed on the plastic part, and the plastic part is then installed into the outer iron core. The entire assembly process is relatively inconvenient and the assembly stability is poor. Utility Model Content

[0006] In view of the above problems, the purpose of the utility model is to provide a DC contactor with an integrated micro switch which has a smaller integrated version, is more convenient to install, and has better product consistency.

[0007] The technical solution to realize the utility model is as follows

[0008] A DC contactor with an integrated micro switch comprises a base with a micro switch structure, an outer iron core, a bracket plate, a plastic bracket, an injection molding shaft, and a coil; the outer iron core is U-shaped and is placed on the top surface of the base; the cylindrical mounting cavity of the bracket plate is inserted into the outer iron core, and the bracket plate is mounted on the top surface of the outer iron core; the injection molding shaft is placed in the mounting cavity of the bracket plate, and a plastic bracket is installed at one end of the injection molding shaft extending out of the bracket plate, and the plastic bracket is connected to a high-voltage moving contact through a spring; a coil is arranged outside the mounting cavity of the bracket plate.

[0009] The micro switch structure includes a base with a hollow interior, in which two micro switch lead-out terminals are arranged; a micro switch is installed in a first groove arranged on the bottom surface of the base, one end of the micro switch is connected to one micro switch lead-out terminal, and the other end is connected to the other micro switch lead-out terminal; a second groove is arranged on the bottom surface of the base above the micro switch, and an auxiliary magnet is installed in the second groove.

[0010] The micro switch is a reed switch, and the auxiliary magnet is composed of a round magnet and a magnetic conductive sheet.

[0011] The base is a plastic transparent base.

[0012] The bottom surfaces of the base at both ends of the first groove are both provided with first slots for the micro switch lead terminals to extend out.

[0013] Two coil lead-out terminals are also arranged in the base, and second slots are arranged on the upper side and the lower side of the base.

[0014] A through groove communicating with the interior of the base is provided on one side surface of the base.

[0015] Buckles are arranged at the four corners of the base, and slots for use with the buckles are arranged at positions corresponding to the buckles on the bottom surface of the outer iron core.

[0016] The above technical solution is adopted, 1. The coil skeleton and the base terminal are quick-plug structure;

[0017] 2. Four terminals are directly injection molded on the base, which can improve the space utilization of the product, increase the high and low voltage insulation distance of the product, improve the stability of the product manufacturing process assembly, and reduce costs;

[0018] 3. The moving iron core and the outer iron core in contact with the shaft connection will not carry high voltage electricity, which ultimately isolates the coil (low voltage) from the contact (high voltage), improving product safety and electrical life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the bottom surface structure of the base of the utility model;

[0021] Figure 3 This is a schematic diagram of the front structure of the base of the utility model;

[0022] In the accompanying drawings, 1 is a base, 2 is an outer iron core, 3 is a bracket plate, 4 is a plastic bracket, 5 is an injection molding shaft, 6 is a coil, 7 is a cylindrical mounting cavity, 8 is a spring, 9 is a high-voltage moving contact, 10 is a micro switch lead terminal, 11 is a first groove, 12 is a micro switch, 13 is a second groove, 14 is an auxiliary magnetic steel, 15 is a first slot, 16 is a coil lead terminal, 17 is a second slot, 18 is a buckle, and 20 is a plug-in. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] A DC contactor with an integrated micro switch includes a base 1 with a micro switch structure inside, an outer iron core 2, a bracket plate 3, a plastic bracket 4, an injection molding shaft 5, and a coil 6; the outer iron core is U-shaped and placed on the top surface of the base; the cylindrical mounting cavity 7 of the bracket plate is inserted into the outer iron core, and the bracket plate is mounted on the top surface of the outer iron core; the injection molding shaft is placed in the mounting cavity of the bracket plate, and a plastic bracket is installed at one end of the injection molding shaft extending out of the bracket plate, and the plastic bracket is connected to a high-voltage moving contact 9 through a spring; a coil is arranged outside the mounting cavity of the bracket plate. The high-voltage moving contact is placed on a spring 8, and the spring is placed on a plastic bracket for insulation; the injection molding shaft is placed in the plastic bracket, so that the shaft does not carry high voltage electricity; and then the moving iron core and the outer iron core connected to the shaft will not carry high voltage electricity; finally, the low-voltage coil is isolated from the high-voltage contact, improving product safety and electrical life.

[0025] The micro switch structure includes two micro switch lead-out terminals 10 provided in the base; a micro switch 12 is installed in a first groove 11 provided on the bottom surface of the base, one end of the micro switch is connected to one micro switch lead-out terminal, and the other end is connected to another micro switch lead-out terminal; a second groove 13 is provided on the bottom surface of the base above the micro switch, and an auxiliary magnet 14 is installed in the second groove. The coil is energized to form a magnetic field, and the reed switch is closed under the combined action of the coil magnetic field and the auxiliary magnet. When the coil is de-energized, the reed switch is disconnected. The micro switch and terminal assembly are integrated on the base to facilitate subsequent assembly. (The Permalloy inside the reed switch is a special material that integrates magnetic material, elastic material, and conductive material)

[0026] The micro switch is a reed switch, and the auxiliary magnet is composed of a round magnet and a magnetic conductive sheet.

[0027] The base is a plastic transparent base, which is convenient for observation.

[0028] The bottom surface of the base at both ends of the first groove is provided with a first slot 15 for the micro switch lead terminal to extend out.

[0029] The base is also provided with two coil lead terminals 16, and the upper side and lower side of the base are both provided with second slots 17, and the coil lead terminals are located at one end of the second slots and connected to the corresponding coils. The plastic base is directly injection molded with four terminals, which can improve the space utilization of the product, increase the high and low voltage insulation distance of the product, improve the stability and convenience of the product manufacturing process assembly, and reduce costs.

[0030] A through slot communicating with the interior of the base is provided on one side surface of the base, and a through slot lead-out terminal is arranged to pass through the through slot.

[0031] The base is provided with buckles at the four corners, and the bottom surface of the outer core and the corresponding position of the buckle 18 are provided with a slot for use with the buckle. The three buckles of the plastic base are directly clamped on the outer core.

[0032] The plug-in unit 20 of the base and the four lead-out terminals of the base are assembled into a portable plug-in unit structure of the base, forming a quick-plug structure.

Claims

1. DC contactor with integrated micro switch, It is characterized in that It includes a base with a micro switch structure, an outer iron core, a bracket plate, a plastic bracket, an injection molding shaft, and a coil; the outer iron core is U-shaped and is placed on the top surface of the base; the cylindrical mounting cavity of the bracket plate is inserted into the outer iron core, and the bracket plate is mounted on the top surface of the outer iron core; the injection molding shaft is placed in the mounting cavity of the bracket plate, and a plastic bracket is installed at one end of the injection molding shaft extending out of the bracket plate, and the plastic bracket is connected to the high-voltage moving contact through a spring; a coil is arranged outside the mounting cavity of the bracket plate.

2. The DC contactor with an integrated micro switch according to claim 1, It is characterized in that The micro switch structure includes a base with a hollow interior, in which two micro switch lead-out terminals are arranged; a micro switch is installed in a first groove arranged on the bottom surface of the base, one end of the micro switch is connected to one micro switch lead-out terminal, and the other end is connected to the other micro switch lead-out terminal; a second groove is arranged on the bottom surface of the base above the micro switch, and an auxiliary magnet is installed in the second groove.

3. The DC contactor with an integrated micro switch according to claim 2, It is characterized in that The micro switch is a reed switch, and the auxiliary magnet is composed of a round magnet and a magnetic conductive sheet.

4. The DC contactor with an integrated micro switch according to claim 1, It is characterized in that The base is a plastic transparent base.

5. The DC contactor with an integrated micro switch according to claim 2, It is characterized in that The bottom surfaces of the base at both ends of the first groove are both provided with first slots for the micro switch lead terminals to extend out.

6. The DC contactor with an integrated micro switch according to claim 1, It is characterized in that Two coil lead-out terminals are also arranged in the base, and second slots are arranged on the upper side and the lower side of the base.

7. The DC contactor with an integrated micro switch according to claim 1, It is characterized in that A through groove communicating with the interior of the base is provided on one side surface of the base.

8. The DC contactor with an integrated micro switch according to claim 1, It is characterized in that Buckles are arranged at the four corners of the base, and slots for use with the buckles are arranged at positions corresponding to the buckles on the bottom surface of the outer iron core.

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