Double-breakpoint test button device

Abstract

The utility model relates to the technical field of test button devices, in particular to a double-breakpoint test button device. According to the technical scheme, the device comprises an upper cover and a lower cover, and further comprises a middle cover fixedly installed between the upper cover and the lower cover, a first conductive loop installed in the upper cavity, a second conductive loop installed in the lower cavity and a test button assembly, and the middle cover divides the space between the upper cover and the lower cover into an upper cavity and a lower cavity. The test button assembly is movably installed on the lower cover, and the operating mechanism is movably installed on the lower cover. According to the utility model, the circuit breaker can be switched on only when the test button is pressed when the circuit breaker is switched on, thereby improving the safety performance. And the pressure of the contacts at the two ends is uniform and balanced under the control of the same operating mechanism, so that the problem of non-uniform pressure distribution of the contacts at the two ends of a double-breakpoint of a single contact is avoided, and the problem that the loss of the two moving contacts is different and uncontrollable is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of test button devices, in particular to a double-breakpoint test button device. Background Art

[0002] Existing circuit breaker test mechanisms are generally divided into two categories: single breakpoint and double breakpoint. The single breakpoint test mechanism can realize the conduction of the test circuit when the test button is pressed, and the structure is relatively simple. However, the defect of the single breakpoint test mechanism is that when the circuit breaker is opened, if the test button is pressed, the output terminal of the circuit breaker will have a voltage to the ground due to the conduction of the test circuit, which may cause the risk of burning the product during use.

[0003] The traditional double-pole double-break circuit breaker design mainly has the following three forms:

[0004] 1. Fork-shaped double-breakpoint circuit breaker, the two breakpoints are arranged in two parallel spaces with the same opening direction. This method has densely distributed contacts, concentrated temperature, easy to heat up, high temperature rise, and high safety hazards;

[0005] 2. Wing-shaped double-break circuit breaker uses the same moving contact conductor to connect with two static contacts through rotation. This method has poor arc isolation effect between the two breakpoints and is prone to breakdown and short circuit;

[0006] 3. Bridge-type double-breakpoint circuit breaker uses the same moving contact conductor to connect with two static contacts through equal movement. This method has a slow opening speed and has a greater impact on the breaking effect. Summary of the invention

[0007] The purpose of the utility model is to solve the problems existing in the background technology and to propose a double-breakpoint test button device which sets two conductive circuits in two completely insulated spaces, with two breakpoints staggered with each other, low temperature rise, fast opening speed and complete arc isolation.

[0008] The technical solution of the utility model is: a double-breakpoint test button device, comprising an upper cover and a lower cover, and also comprising:

[0009] A middle cover fixedly installed between the upper cover and the lower cover, wherein the middle cover divides the space between the upper cover and the lower cover into an upper cavity and a lower cavity;

[0010] A first conductive loop installed in the upper cavity and a second conductive loop installed in the lower cavity;

[0011] A test button assembly, wherein the test button assembly is movably mounted on the lower cover;

[0012] An operating mechanism, which is movably mounted on the lower cover and which simultaneously controls the on / off states of the first conductive loop and the second conductive loop as well as the circuit of the test button assembly;

[0013] The first conductive loop and the second conductive loop are located on the operating mechanism.

[0014] Optionally, the operating mechanism includes a handle rotatably mounted on the lower cover and a lever rotatably mounted on the middle cover, a connecting rod rotatably mounted on the handle, the other end of the connecting rod is rotatably connected to the lever, and two sides of the lever are respectively located in the upper cavity and the lower cavity.

[0015] Optionally, a locking piece is clamped on the lever, a locking torsion spring is inserted into the locking piece, one torsion arm of the locking torsion spring abuts against the locking piece, and the other torsion arm of the locking torsion spring abuts against the lever.

[0016] Optionally, the first conductive circuit includes a first moving contact installed on the lever and a first static contact fixedly installed in the upper cavity, the first moving contact is crimped against the locking piece, and a first torsion spring is provided on the side of the first moving contact close to the upper cover, one of the torsion arms of the first torsion spring abuts against the first moving contact, and the other torsion arm of the first torsion spring abuts against the lever.

[0017] Optionally, the second conductive circuit includes a second moving contact clamped to the side of the lever close to the lower cover, and a second static contact fixedly installed in the lower cavity. A second torsion spring is provided on the side of the second moving contact close to the lower cover, one of the torsion arms on the second torsion spring abuts against the second moving contact, and the other torsion arm on the second torsion spring abuts against the lever.

[0018] Optionally, the test button assembly includes a test button movably mounted on the lower cover and a button torsion spring clamped in the upper cavity, one of the torsion arms of the button torsion spring abuts against the test button, the other torsion arm of the button torsion spring is located on one side of the first moving contact, and a button static contact is fixedly mounted in the upper cavity.

[0019] Optionally, a connecting groove is provided on the first moving contact, and one of the torsion arms of the button torsion spring is located inside the connecting groove.

[0020] Compared with the prior art, the utility model has the following beneficial technical effects:

[0021] The circuit breaker will only be connected when the test button is pressed when it is closed, which improves safety performance.

[0022] The two conductive circuits are set in two completely insulated spaces, and the two break points are staggered with each other, which has low temperature rise and fast opening speed, realizing complete isolation of the arc; it has two sets of independent moving contacts and contact springs to realize automatic distribution of contact pressure.

[0023] Controlled by the same operating mechanism, the contact pressures at both ends are evenly balanced, thus avoiding the problem of uneven contact pressure distribution at both ends of the double breakpoints of a single contact, thereby avoiding the problem of different and uncontrollable losses of the two moving contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A structural schematic diagram of an embodiment of the utility model is given;

[0025] Figure 2 A schematic diagram of the positions of the upper cover, lower cover and middle cover of the utility model is provided;

[0026] Figure 3 The structure of the test button assembly of the utility model is given as follows: Figure 1 ;

[0027] Figure 4 A structural schematic diagram of the first conductive loop of the utility model is given;

[0028] Figure 5 A schematic diagram of the structure of the second conductive loop of the utility model is given;

[0029] Figure 6 The structure of the test button assembly of the utility model is given as follows: Figure 2 ;

[0030] Figure 7 A structural schematic diagram of the operating mechanism of the utility model is given;

[0031] Figure 8 Provide the utility model Figure 3 A partial enlarged view of point A in the middle.

[0032] Figure numerals: 1. upper cover; 101. lower cover; 102. middle cover; 2. handle; 201. lever; 202. connecting rod; 3. locking piece; 301. locking torsion spring; 4. first moving contact; 401. first static contact; 402. first torsion spring; 403. connecting groove; 5. second moving contact; 501. second static contact; 502. second torsion spring; 6. test button; 601. button torsion spring; 602. button static contact. DETAILED DESCRIPTION

[0033] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] Example

[0035] like Figure 1-2 As shown, a double-breakpoint test button device proposed by the utility model includes an upper cover 1 and a lower cover 101, a middle cover 102 fixedly installed between the upper cover 1 and the lower cover 101, and the middle cover 102 divides the space between the upper cover 1 and the lower cover 101 into an upper cavity and a lower cavity.

[0036] like Figure 3-5 As shown, a first conductive circuit installed in the upper cavity and a second conductive circuit installed in the lower cavity. The first conductive circuit includes a first moving contact 4 installed on the lever 201, a first stationary contact 401 fixedly installed in the upper cavity, the first moving contact 4 is crimped to the lock member 3, and a first torsion spring 402 is provided on the side of the first moving contact 4 close to the upper cover 1, one of the torsion arms of the first torsion spring 402 abuts against the first moving contact 4, and the other torsion arm of the first torsion spring 402 abuts against the lever 201. When the first moving contact 4 abuts against the first stationary contact 401, the first conductive circuit is connected. The first torsion spring 402 resets the first moving contact 4.

[0037] The second conductive circuit includes a second moving contact 5 clamped on the side of the lever 201 close to the lower cover 101, a second stationary contact 501 fixedly installed in the lower cavity, a second torsion spring 502 is provided on the side of the second moving contact 5 close to the lower cover 101, one of the torsion arms on the second torsion spring 502 abuts against the second moving contact 5, and the other torsion arm on the second torsion spring 502 abuts against the lever 201. When the second moving contact 5 abuts against the second stationary contact 501, the second conductive circuit is connected, and the second torsion spring 502 resets the second moving contact 5.

[0038] like Figure 2 and Figure 6 as well as Figure 8 As shown, the test button assembly is movably mounted on the lower cover 101. The test button assembly includes a test button 6 movably mounted on the lower cover 101, a button torsion spring 601 clamped in the upper cavity, one of the torsion arms of the button torsion spring 601 abuts against the test button 6, and the other torsion arm of the button torsion spring 601 is located on one side of the first moving contact 4, and a button static contact 602 is fixedly installed in the upper cavity. A connecting groove 403 is provided on the first moving contact 4, and one of the torsion arms of the button torsion spring 601 is located inside the connecting groove 403. When the torsion arm of the button torsion spring 601 close to one end of the first moving contact 4 contacts the first moving contact 4, the circuit of the test button assembly is connected. At this time, pressing the test button 6 connects the test button 6 with the button static contact 602, and the circuit connection can be completed.

[0039] like Figure 3-5 and Figure 7As shown, the operating mechanism is movably mounted on the lower cover 101, and the operating mechanism simultaneously controls the on / off states of the first conductive circuit, the second conductive circuit, and the circuit of the test button assembly. The operating mechanism includes a handle 2 rotatably mounted on the lower cover 101, and a lever 201 rotatably mounted on the middle cover 102. A connecting rod 202 is rotatably mounted on the handle 2, and the other end of the connecting rod 202 is rotatably connected to the lever 201. The two sides of the lever 201 are respectively located in the upper cavity and the lower cavity. A locking member 3 is clamped on the lever 201, and a locking torsion spring 301 is inserted into the locking member 3. One of the torsion arms of the locking torsion spring 301 abuts against the locking member 3, and the other torsion arm of the locking torsion spring 301 abuts against the lever 201. The handle 2 is rotated to drive the lever 201 to rotate through the connecting rod 202, and the first moving contact 4 and the second moving contact 5 on the lever 201 can be driven to move at the same time, so that the first moving contact 4 can move toward the direction close to the first static contact 401, and the second moving contact 5 can move toward the direction close to the second static contact 501, so that the first conductive circuit and the second conductive circuit are connected or closed at the same time. And the rotating first moving contact 4 will contact the button torsion spring 601 at the same time, so that the circuit of the test button assembly is connected.

[0040] Working principle: When closing the circuit, the handle 2 drives the lever 201, the locking piece 3, the first moving contact 4 and the second moving contact 5 to rotate counterclockwise at the same time through the connecting rod 202. The first moving contact 4 and the second moving contact 5 are respectively connected to the first static contact 401 and the second static contact 501. The first conductive circuit and the second conductive circuit are both in the energized state. At this time, the first moving contact 4 will contact the button torsion spring 601 at the same time, so that the circuit of the test button assembly is connected.

[0041] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A double-breakpoint test button device, comprising an upper cover (1) and a lower cover (101), characterized in that: Also includes: A middle cover (102) fixedly mounted between the upper cover (1) and the lower cover (101), wherein the middle cover (102) divides the space between the upper cover (1) and the lower cover (101) into an upper cavity and a lower cavity; A first conductive loop installed in the upper cavity and a second conductive loop installed in the lower cavity; A test button assembly, wherein the test button assembly is movably mounted on the lower cover (101); An operating mechanism, the operating mechanism is movably mounted on the lower cover (101), and the operating mechanism simultaneously controls the on / off states of the first conductive loop and the second conductive loop and the test button assembly circuit; The first conductive loop and the second conductive loop are located on the operating mechanism.

2. A double breakpoint test button device according to claim 1, characterized in that: The operating mechanism comprises a handle (2) rotatably mounted on the lower cover (101) and a lever (201) rotatably mounted on the middle cover (102); a connecting rod (202) is rotatably mounted on the handle (2); the other end of the connecting rod (202) is rotatably connected to the lever (201); and two sides of the lever (201) are respectively located in the upper cavity and the lower cavity.

3. A double breakpoint test button device according to claim 2, characterized in that: The lever (201) is clamped with a locking member (3), the locking member (3) is plugged with a locking torsion spring (301), one of the torsion arms of the locking torsion spring (301) abuts against the locking member (3), and the other torsion arm of the locking torsion spring (301) abuts against the lever (201).

4. A double breakpoint test button device according to claim 3, characterized in that: The first conductive circuit comprises a first moving contact (4) mounted on a lever (201) and a first stationary contact (401) fixedly mounted in an upper cavity; the first moving contact (4) is crimped against the locking member (3); a first torsion spring (402) is provided on a side of the first moving contact (4) close to the upper cover (1); one torsion arm of the first torsion spring (402) abuts against the first moving contact (4); and the other torsion arm of the first torsion spring (402) abuts against the lever (201).

5. A double breakpoint test button device according to claim 3, characterized in that: The second conductive circuit comprises a second moving contact (5) clamped on the side of the lever (201) close to the lower cover (101), and a second stationary contact (501) fixedly installed in the lower cavity; a second torsion spring (502) is provided on the side of the second moving contact (5) close to the lower cover (101); one of the torsion arms on the second torsion spring (502) abuts against the second moving contact (5), and the other torsion arm on the second torsion spring (502) abuts against the lever (201).

6. A double breakpoint test button device according to claim 4, characterized in that: The test button assembly comprises a test button (6) movably mounted on the lower cover (101), and a button torsion spring (601) clamped in the upper cavity, one torsion arm of the button torsion spring (601) abuts against the test button (6), and the other torsion arm of the button torsion spring (601) is located on one side of the first moving contact (4), and a button static contact (602) is fixedly mounted in the upper cavity.

7. A double breakpoint test button device according to claim 6, characterized in that: The first moving contact (4) is provided with a connecting groove (403), and one of the torsion arms of the button torsion spring (601) is located inside the connecting groove (403).

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