DC contactor with dual micro switches

Abstract

A DC contactor with dual micro switches, characterized in that, comprising: a coli, a push rod and two micro switches, the two micro switches are respectively installed at two predetermined positions in the contactor, the push rod is provided with two toggle arms respectively matched with the two micro switches, when main contacts of the contactor are in contact, the two micro switches turn on or off or convert contact by the toggle arms of the push rod according to a predetermined means.

Claims

1. A DC contactor with dual micro switches, comprising: a coil, a push rod and two micro switches, the two micro switches are respectively installed at two predetermined positions in the contactor, the push rod is provided with two toggle arms respectively matched with the two micro switches, when main contacts of the contactor are in contact, the two micro switches turn on or off, wherein the two micro switches are respectively a first micro switch for detecting an on/off condition of the main contacts and a second micro switch for realizing energy saving, the second micro switch is a normally closed micro switch, when the coil is excited, the push rod pushes the main movable contact of the contactor to move and contact the main stationary contact, then one toggle arm of the push rod drives a contact arm of the first micro switch to move so as to cause the first micro switch to turn on or off; the other toggle arm of the push rod drives a contact arm of the second micro switch to move so as to cause the second micro switch to turn off.

2. The DC contactor with dual micro switches according to claim 1, characterized in that, one of the toggle arms of the push rod is a first toggle arm, and the other toggle arm is a second toggle arm; the coil comprises a holding coil and an acceleration coil, the acceleration coil and the normally closed second micro switch are connected in series, and the components connected in series are connected in parallel with the holding coil; when the main contacts of the contactor are in contact, the second toggle arm of the push rod drives the contact arm of the second micro switch to move so as to turn off the power supply of the acceleration coil, thereby achieving energy saving.

3. The DC contactor with dual micro switches according to claim 2, characterized in that, the coil is designed to be a structure having an inner ring and an outer ring, the holding coil is the inner ring, and the acceleration coil is the outer ring.

4. The DC contactor with dual micro switches according to claim 2, characterized in that, the push rod comprises a spring seat and a rod body, one end of the rod body is fixedly connected to the spring seat, and the first toggle arm and the second toggle arm are respectively connected to the spring seat.

5. The DC contactor with dual micro switches according to claim 4, characterized in that, the contactor further comprises a ceramic cover in which the main contact is accommodated, the first micro switch and the second micro switch are respectively disposed at two sides of the outside of the ceramic cover, the spring seat of the push rod is also accommodated in the cavity of the ceramic cover, the first toggle arm and the second toggle arm respective protrude from the cavity of the ceramic cover to two sides of the outside of the ceramic cover and correspondingly cooperate with the first micro switch and the second micro switch respectively.

6. The DC contactor with dual micro switches according to claim 4, characterized in that, the second toggle arm and the spring seat are integrally connected by injection molding.

7. The DC contactor with dual micro switches according to claim 6, characterized in that, the spring seat further has a fixing piece embedded therein by injection molding.

8. The DC contactor with dual micro switches according to claim 5, characterized in that, the second toggle arm and the spring seat are integrally connected by injection molding.

9. The DC contactor with dual micro switches according to claim 8, characterized in that, the spring seat further has a fixing piece embedded therein by injection molding.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic view illustrating the electrical connection of a second micro switch and a coil according to an embodiment of the present disclosure;

(2) FIG. 2 is a top view of an embodiment (partial configuration) of the present disclosure;

(3) FIG. 3 is a side view of an embodiment (partial configuration) of the present disclosure;

(4) FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2;

(5) FIG. 5 is a schematic view of the construction of a push rod according to an embodiment of the present disclosure.

DETAILED DESCRIPTION

(6) A DC contactor with dual micro switches is provided with two micro switches in an embodiment of the present disclosure, and the two micro switches are respectively matched with the two toggle arms of the push rod, when the main contacts of the contactor are in contact, the two micro switches turns on or off by the toggle arms of the push rod according to a predetermined means, so that the two micro switches play a role as the two sets of auxiliary contacts. Both micro-switches can be used to detect the on-off condition of the main contacts, which plays a dual role of insurance, and also can be used for other needs. Moreover, the on/off condition of the main contacts can be detected by using the on function, the off function, or the contact switching function of the micro switch according to the actual needs of the product.

(7) in this embodiment, one of the two micro switches is used to detect the on/off condition of the main contacts, and the other is used to achieve energy saving.

(8) Referring to FIG. 1 to FIG. 5, a DC contactor with a dual micro switch according to an embodiment of the present disclosure includes a coil 1, a push rod 2 and a first micro switch 3 for detecting an on/off condition of the main contacts, the push rod 2 is provided with a first toggle arm 21, the first micro switch 3 is disposed in the DC contactor and is located at a position correspondingly matched to the first toggle arm 21 of the push rod; the contactor further includes a normally closed second micro switch 4, the coil 1 includes a holding coil 11 and an acceleration coli 12, the acceleration coil 11 and the normally closed second micro switch 4 are connected in series, and the components connected in series the acceleration coli 12 and the normally closed second micro switch 4) are connected in parallel with the holding coil 11; the push rod 2 is provided with a second toggle arm for cooperating with the second micro switch 4 to turn off the power supply of the acceleration coil 12 when the main contacts of the contactor (i.e., the main movable contact and the main stationary contact) are in contact, thereby achieving energy saving.

(9) In this embodiment, the coil 1 is designed to be a structure having an inner ring and an outer ring, the holding coil 11 is the inner ring, and the acceleration coil 12 is an outer ring; the acceleration coil 12 with large power consumption, which has a function of closing the contacts, and the acceleration coil 12 does not operate after the contacts being closed; the holding coil 11 with small power consumption, which has a function of keeping the contacts being closed, thusly keeping the coil 11 being always operated.

(10) When the coil 1 is excited so that the push rod 2 pushes the main movable contact of the contactor to move and contact to the main stationary contact, the first toggle arm 21 of the push rod 2 drives the contact arm of the first micro switch 3 to move, such that the first micro switch 3 could turn on or off, when the main contacts are in contact, the first micro switch 3 can be set to be in an on state, or the first micro switch 3 can be set to be in an off state, which mainly depends on the judgment of the collected signal, therefore, the first micro switch 3 can be a normally closed type, a normally open type or a conversion type; the second toggle arm 22 of the push rod 2 drives the contact arm of the second micro switch 4 to move, such that the second micro switch 4 could turn off Since the second micro switch 4 functions to turn off the circuit when the main contacts are in contact, the second micro switch 4 must be normally closed.

(11) In this embodiment, the push rod 2 includes a spring seat 23 and a rod body 24, one end of the rod body 24 is fixedly connected to the spring seat 23, and the first toggle arm 21 and the second toggle arm 22 are respectively connected to the spring seat 23.

(12) In this embodiment, the contactor also includes a ceramic cover (not shown) in which the main contact is accommodated, the first micro switch 3 and the second micro switch 4 are respectively disposed at two sides of the outside of the ceramic cover, the spring seat 23 of the push rod is also accommodated in the cavity of the ceramic cover, the first toggle arm 21 and the second toggle arm 22 respectively protrude from the cavity of the ceramic cover to two sides of the outside of the ceramic cover and correspondingly cooperate with the first micro switch 3 and the second micro switch 4 respectively.

(13) In this embodiment, the first toggle arm 21, the second toggle arm 22 and the spring seat 23 are integrally connected by injection molding.

(14) In this embodiment, the spring seat 23 also has a fixing piece 25 embedded therein by injection molding.

(15) As shown in FIG. 4, when the coil 1 is excited, a movable iron core 51 moves upward to drive the push rod 2 to move upward, and the push rod 2 moves upward, such that the main movable contact 52 could move and contact with the main stationary contact, at the same time, the first toggle arm 21 and the second toggle arm 22 at both sides of the push rod 2 also respectively drive the contact arm of the first micro switch 3 and the contact arm of the second micro switch 4 to move, such that the corresponding micro switches will turn on and off.

(16) The first micro switch 3 (equivalent to the first set of auxiliary contacts): when the coil 1 is excited, the movable iron core 51 and the push rod 2 are driven, and the first toggle arm 21 of the push rod 2 drives the contact arm of the first micro switch 3 to move so as to generate an on or off signal, the on/off status of the main contact can be known by the judgment of the board CPU.

(17) The second micro switch 4 (equivalent to the second set of auxiliary contacts) with a normally closed structure: when the coil 1 is excited, the movable iron core 51 and the push rod 2 are driven to move till the main contacts are closed, then the second micro switch 4 turns off, after the second micro switch 4 turns off, the acceleration coil 12 doesn't operate, but only the holding coil 11 operates, thereby achieving the effect of energy saving.

(18) A DC contactor with dual micro switches in embodiment of the disclosure is provided, wherein a normally closed second micro switch 4 is provided, and the coil 1 includes a holding coil 11 and an acceleration coli 12, the acceleration coil 12 and the normally closed second micro switch 4 are connected in series, and the components connected in series are connected in parallel with the holding coil 11; at the same time, the push rod 2 is provided with a second toggle arm 22 for cooperating with the second micro switch 4, when the coli is excited, the push rod 2 is driven to move till the main contacts are closed, then the normally closed second micro switch 4 turns off, after the normally closed second micro switch 4 turns off, the acceleration coil 12 doesn't operate, but only the holding coil 11 operates, thereby achieving the effect of energy saving. The embodiment of disclosure adopts a manner that the second toggle arm 22 of the push rod cooperates with the normally closed second micro switch 4 to achieve the energy saving effect, thereby realizing the elimination of a complicated circuit structure used for performing power saving in a circuit board in the related art, and providing a simpler circuit structure and better applicability.

(19) The above is only a preferred embodiment of the present disclosure and is not intended to limit the disclosure in any way. Although the present disclosure has been disclosed above in the preferred embodiments, it is not intended to limit the disclosure. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present disclosure or modify the technical solution of the present disclosure to an equivalent embodiment by using the above-disclosed technical contents without departing from the scope of the technical solutions of the present disclosure. Therefore, any simple modifications, equivalent changes, and modifications to the above embodiments in accordance with the teachings of the present disclosure should fall within the scope of the present disclosure.