CN218215183U

CN218215183U - Test loop mechanism and residual current circuit breaker

Info

Publication number: CN218215183U
Application number: CN202221667330.2U
Authority: CN
Inventors: 康旭; 朱俊; 张晓东
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-01-03
Anticipated expiration: 2032-06-30

Abstract

The utility model provides a test loop mechanism, test resistance, first spring and second spring include first connecting portion and second connecting portion respectively, and first connecting portion and second connecting portion are connected with two pins of test resistance respectively, be equipped with the joint structure on first connecting portion and/or the second connecting portion, the cooperation of joint structure and test resistance's pin joint, the second spring still is equipped with the contact site of being connected with circuit breaker major loop, first spring still be equipped with test button complex action portion, press test button can drive action portion and circuit breaker major loop electricity and be connected, make test resistance inserts circuit breaker major loop, need not to be connected through driven modes such as welding and riveting between test resistance and first spring and/or the second spring to need not to connect test resistance through the wire, have simple structure, convenient assembling and connect reliable characteristics, be favorable to realizing automatic assembly, improve production efficiency.

Description

Test loop mechanism and residual current circuit breaker

Technical Field

The invention relates to the field of low-voltage electrical appliances, in particular to a test loop mechanism and a leakage circuit breaker.

Background

The low-voltage circuit breaker can be used for distributing electric energy and protecting overload and short circuit of lines and power supply equipment, and can also be used for infrequent line switching and infrequent motor starting. Along with the continuous development towards automated production of miniature circuit breaker, need simplify miniature circuit breaker's structure, satisfy the machine and replace artificial production mode. The low-voltage circuit breaker usually has a residual current action protection function, the reliability of the function is generally detected by designing a test loop mechanism, the electricity is taken through a main current loop, an auxiliary circuit which can be switched on and off is designed, a proper resistor is connected in the loop in series, and a leakage signal is generated by switching on and off the auxiliary loop to judge whether the leakage protection function is normal or not.

In the case of connecting a resistor in series in a test circuit mechanism, the resistor is often connected with a lead in an auxiliary circuit by soldering, riveting and other processes, and the connection of the lead and a main circuit is also realized in a spot welding or soldering manner. The number of connecting points is large, and the production process is complex to realize. Meanwhile, the conducting wire also needs a proper layout and punching process to complete the design of the whole auxiliary loop. The whole realization structure is complex, the production efficiency is low, and the automation is difficult to realize.

SUMMERY OF THE UTILITY MODEL

The invention aims to overcome the defects of the prior art and provides a test loop mechanism which is simple in structure and convenient to assemble.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an experimental return circuit mechanism, experimental resistance, first spring and second spring include first connecting portion and second connecting portion respectively, and first connecting portion and second connecting portion are connected with two pins of experimental resistance respectively, be equipped with the joint structure on first connecting portion and/or the second connecting portion, the cooperation of joint structure and experimental resistance's pin joint, the second spring still is equipped with the contact site of being connected with the circuit breaker major loop, first spring still be equipped with experimental button complex action portion, press experimental button and can drive action portion and circuit breaker major loop electricity and be connected, make experimental resistance inserts the circuit breaker major loop.

Preferably, the clamping structure comprises two clamping sections which are oppositely arranged and a wrapping section which is connected between the two clamping sections, and the pin of the test resistor can be inserted between the two clamping sections of the clamping structure and is in contact with the wrapping section.

Preferably, the first spring includes a screw portion rotatably mounted on the housing, and the operating portion and the first connecting portion are connected to the screw portion, respectively.

Preferably, the test resistor, the first spring and the second spring are respectively arranged in the shell, a wiring terminal is arranged in the shell, and the contact part is in contact fit with the wiring terminal.

Preferably, the casing includes two half shells that set up relatively, binding post installs on one of them half shell, the contact site be equipped with wherein another half shell complex bend the section to and with the contact segment that the section is connected of bending, when two half shell combinations are the casing, one of them half shell can promote bend the section, make it drives contact segment and binding post contact to bend the section.

Preferably, the contact part of the second spring is bent towards one side far away from the wiring terminal to form the bending section, one end of the bending section is connected with the second connecting part of the second spring, and one end of the bending section far away from the second connecting part is bent towards one side far away from the wiring terminal to form the contact section.

Preferably, binding post includes the lug, the lug includes relative last wiring portion and the lower wiring portion that sets up to and connect the right side wiring portion between last wiring portion and lower wiring portion one side, keep away from in the lower wiring portion one side and the left side wiring portion of right side wiring portion are connected, the contact site with the side contact of right side wiring portion.

Preferably, one of them half shell is equipped with the spacing groove that corresponds respectively with first connecting portion and second connecting portion, is equipped with the groove of dodging that corresponds with the joint structure on the spacing groove, and another half shell is equipped with the clamp plate that corresponds with the spacing groove to and dodge the picture peg that the groove corresponds, two half shell combinations are when the casing, the clamp plate can be inserted the spacing groove in with the first connecting portion and the second connecting portion that correspond compress tightly at the spacing inslot, the picture peg can be inserted and dodge in the groove and compress tightly test resistance's pin and joint structure.

Preferably, action portion extends to test button below, and action portion and spiral part are equipped with the first section of bending that becomes the V type, the department of buckling and the test button contact of first section of bending and spacing cooperation, the tip bending type of action portion becomes the first contact section that is used for getting the electricity from the major loop.

According to the test loop mechanism, the clamping structure is arranged on the second connecting part of the first spring and/or the second spring, so that the pin of the test resistor can be connected with the first spring and/or the second spring through clamping matching, the test resistor is not required to be connected with the first spring and/or the second spring in a transmission mode such as welding and riveting, the contact part can be connected into the main loop of the circuit breaker through the first spring and the second spring, the test resistor is not required to be connected through a lead, the test loop mechanism has the characteristics of simple structure, convenience in assembly and reliability in connection, the automatic assembly is facilitated, the production efficiency is improved, and the contact part can be connected into the main loop of the circuit breaker without being connected through a lead

In addition, when the two half shells are combined into a shell, one half shell can push the bending section, so that the bending section drives the contact section to be in contact with the wiring terminal, and the assembling difficulty can be further reduced.

The invention also provides a residual current circuit breaker, which comprises the test loop mechanism and has the characteristics of simple structure and convenient assembly.

Drawings

Fig. 1 is a schematic structural diagram of the residual current circuit breaker of the present invention;

FIG. 2 is a schematic diagram of the structure of the inventive test loop mechanism;

FIG. 3 is a schematic diagram of the structure of the inventive test resistor;

FIG. 4 is a schematic diagram of the second spring of the present invention;

FIG. 5 is a schematic diagram of the spring of the present invention;

FIG. 6 is a schematic structural view of the inventive lug;

FIG. 7 is a schematic view of the invention creating the mating of the left and right half shells;

FIG. 8 is a schematic view of the right half shell of the present invention;

fig. 9 is a schematic view of the structure of the left half shell of the present invention.

Detailed Description

The following description will further describe the specific embodiment of the test loop mechanism according to the present invention with reference to the examples shown in the drawings. The test loop mechanism created by the present invention is not limited to the description of the following embodiments.

As shown in fig. 1 to 4, the test loop mechanism created by the present invention includes a test resistor 1, a first spring 2 and a second spring 3, the first spring 2 and the second spring 3 respectively include a first connecting portion 21 and a second connecting portion 31, the first connecting portion 21 and the second connecting portion 31 are respectively connected to two pins 11 of the test resistor 1, a clamping structure 4 is disposed on the first connecting portion 21 and/or the second connecting portion 31, the clamping structure 4 is in clamping fit with the pins 11 of the test resistor 1, the second spring 3 is further provided with a contact portion 32 connected to a main circuit of a circuit breaker, the first spring 2 is further provided with an actuating portion 22 matched to the test button 5, and pressing the test button 5 can drive the actuating portion 22 to be electrically connected to the main circuit of the circuit breaker, so that the test resistor 1 is connected to the main circuit of the circuit breaker.

According to the test loop mechanism, the clamping structure 4 is arranged on the second connecting part 31 of the first spring 2 and/or the second spring 3, so that the pin 11 of the test resistor 1 can be connected with the first spring 2 and/or the second spring 3 through clamping fit, the test resistor is not required to be connected with the first spring 2 and/or the second spring 3 in a transmission mode such as welding and riveting, the contact part 32 can be connected into a main circuit of a circuit breaker through the first spring 2 and the second spring 3, the test resistor 1 is not required to be connected through a lead, and the test loop mechanism has the characteristics of simple structure, convenience in assembly and reliability in connection, is beneficial to realizing automatic assembly, and improves the production efficiency.

As shown in fig. 2 and 5, the first spring 2 is a torsion spring, and includes a spiral portion 23 rotatably mounted on the housing, the action portion 22 and the first connecting portion 21 are respectively connected to the spiral portion 23, the first connecting portion 21 is provided with the clamping structure 4, and the first connecting portion 21 of the first spring 2 and the second connecting portion 31 of the second spring 3 are respectively in clamping fit with the pins 11 at the two ends of the test resistor 1 through the clamping structure 4. Action portion 22 extends to test button 5 below, and action portion 22 and spiral portion 23 are equipped with the first section of bending of one-tenth V type, the department of buckling of first section of bending and test button 5 contact and spacing cooperation. The end of the action part 22 is bent to form a first contact section for taking electricity from the main circuit, the first contact section may be arc-shaped so as to contact and form a test circuit for simulating a fault signal to test, and the first contact section may take electricity from a static contact of the main circuit or from other positions of the main circuit.

Further, joint structure 4 is bent by first connecting portion 21 and second connecting portion 31 respectively and forms, and the joint structure 4 of this embodiment is the U type, and it includes two joint sections 41 of relative setting to and connect the parcel section 42 between two joint sections 41, the cross-section semicircular in shape of parcel section 42, test resistor 1's pin 11 can insert between two joint sections 41 of corresponding joint structure 4 and with parcel section 42 contacts. The clamping structure 4 of this embodiment is the U type, through setting up the semicircular parcel section 42 in cross-section, can increase with the area of contact of test resistance 1's pin 11, connects more reliably. Of course, the clamping structure 4 may also be in a V shape, or have only a semicircular wrapping section 42, which is within the protection scope of the present invention.

As shown in fig. 7-9, the test resistor 1, the first spring 2 and the second spring 3 are respectively disposed in a housing, a terminal is disposed in the housing, the housing includes two half shells disposed opposite to each other, and the contact portion 32 is in contact with and engaged with one terminal. Of course, the contact 32 may also take power from other parts that are connected into the main circuit.

Further, binding post installs on one of them half shell, test resistance 1 corresponds this binding post setting, is located between this binding post and another half shell, contact site 32 be equipped with wherein another half shell complex bend section 33 to and with bend the contact segment 34 that section 33 is connected, contact segment 34 with binding post cooperation, when two half shell combinations are the casing, one of them half shell can promote bend section 33, make bend section 33 drives contact segment 34 and binding post contact, can further reduce the degree of difficulty of assembly.

Concrete, two half shells are half shell 8 on the left side and half shell 9 on the right side respectively, binding post installs on half shell 9 on the right side, bend section 33 and the cooperation of half shell 8 on the left side, binding post includes lug 61, connection terminal 62 and binding screw 63, contact segment 34 contacts with lug 61 under the section 33 of bending drives, lug 61 is including the last portion of working a telephone switchboard 64 and the lower wiring portion 65 that set up relatively to and connect the right side portion of working a telephone switchboard 66 between last portion of working a telephone switchboard 64 and lower wiring portion 65 one side, keep away from under the portion of working a telephone switchboard 65 one side and the left portion of working a telephone switchboard 67 of right side portion 66 are connected, it is equipped with the hole of dodging that is used for dodging binding screw 63 to go up portion of working a telephone switchboard 62 portable cover under the portion 65 outside and with binding screw 63 threaded connection, contact segment 34 under the section 33 of bending drives with the side contact of the right side portion of working a telephone switchboard 66.

The wire connecting piece 61 of the embodiment is fixed on the shell, the wire connecting seat 62 moves under the driving of the wire connecting screw 63, the wire is clamped on the wire connecting piece 61 through the wire connecting seat 62, and the contact with the wire connecting piece 61 through the contact section 34 is more reliable. Of course, the terminal can be realized in many ways, such as when the wire holder 62 is fixed and the wire connector 61 is movable, the contact section 34 can be in contact with and matched with the wire holder 62, which falls within the protection scope of the present invention.

As shown in fig. 4, the second spring 3 is a compression spring, the contact portion 32 of the second spring 3 is bent towards the side away from the connection terminal to form the bent section 33, the bent section 33 is V-shaped, one end of the bent section 33 is connected with the second connection portion 31 of the second spring 3, and one end of the bent section 33 away from the second connection portion 31 is bent towards the side away from the connection terminal to form the contact section 34.

As shown in fig. 8-9, one of them half shell is equipped with the spacing groove that corresponds respectively with first connecting portion 21 and second connecting portion 31, is equipped with the groove of dodging that corresponds with joint structure 4 on the spacing groove, and another half shell is equipped with the clamp plate that corresponds with the spacing groove to and dodge the picture peg that the groove corresponds, when two half shell combinations are the casing, the clamp plate can insert and compress tightly at the spacing inslot with first connecting portion 21 and second connecting portion 31 that correspond in the spacing groove, the picture peg can be inserted and dodge in the groove and compress tightly test resistance 1's pin 11 and joint structure 4.

Specifically, the right half shell 9 is provided with the limiting groove and the avoiding groove, the limiting groove corresponding to the first connecting portion 21 is a first limiting groove 91, the limiting groove corresponding to the second connecting portion 31 is a second limiting groove 92, the avoiding groove corresponding to the clamping structure 4 on the first connecting portion 21 is a first avoiding groove 93, and the avoiding groove corresponding to the clamping structure 4 on the second connecting portion 31 is a second avoiding groove 94;

half shell 8 is equipped with on a left side clamp plate and picture peg, the clamp plate that corresponds with first spacing groove 91 are first clamp plate 81, the clamp plate that corresponds with second spacing groove 92 is second clamp plate 82, the picture peg that corresponds with first dodging groove 93 is first picture peg 83, the picture peg that corresponds with second dodging groove 94 is second picture peg 84.

The invention also provides a residual current circuit breaker which comprises the test loop mechanism and has the characteristics of simple structure and convenient assembly.

It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when used, and are only for convenience of description, but do not indicate that the referred device or element must have a specific orientation, and thus, should not be construed as limiting the present invention. Moreover, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating relative importance.

The foregoing is a more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the inventive concept, and all should be considered as falling within the protection scope of the invention.

Claims

1. A test loop mechanism is characterized in that: test resistance (1), first spring (2) and second spring (3) include first connecting portion (21) and second connecting portion (31) respectively, and first connecting portion (21) and second connecting portion (31) are connected with two pins (11) of test resistance (1) respectively, be equipped with joint structure (4) on first connecting portion (21) and/or second connecting portion (31), joint structure (4) and test resistance's (1) pin (11) joint cooperation, second spring (3) still are equipped with contact site (32) of being connected with the circuit breaker major loop, first spring (2) still be equipped with test button (5) complex action portion (22), press test button (5) and can drive action portion (22) and be connected with the circuit breaker major loop electricity, make test resistance (1) inserts the circuit breaker major loop.

2. The test loop mechanism of claim 1, wherein: joint structure (4) are including two joint sections (41) of relative setting to and parcel section (42) of connection between two joint sections (41), pin (11) of experimental resistance (1) can be inserted between two joint sections (41) of joint structure (4) and with parcel section (42) contact.

3. The test loop mechanism of claim 1, wherein: the first spring (2) comprises a spiral part (23) rotatably mounted on the shell, and the action part (22) and the first connecting part (21) are respectively connected with the spiral part (23).

4. The test loop mechanism of claim 1, wherein: the testing resistor (1), the first spring (2) and the second spring (3) are respectively arranged in the shell, a wiring terminal is arranged in the shell, and the contact part (32) is in contact fit with the wiring terminal.

5. The test loop mechanism of claim 4, wherein: the casing is including two half shells of relative setting, binding post installs on one of them half shell, contact site (32) be equipped with wherein another half shell complex bend section (33) to and with bend contact segment (34) that section (33) are connected, when two half shell combinations are the casing, one of them half shell can promote bend section (33), make bend section (33) drive contact segment (34) and binding post contact.

6. The test loop mechanism of claim 5, wherein: the contact portion (32) of the second spring (3) is bent towards one side far away from the wiring terminal to form the bending section (33), one end of the bending section (33) is connected with the second connecting portion (31) of the second spring, and one end, far away from the second connecting portion (31), of the bending section (33) is bent towards one side far away from the wiring terminal to form the contact section (34).

7. The test loop mechanism of claim 4, wherein: binding post includes lug (61), lug (61) are including relative last wiring portion (64) and lower wiring portion (65) that set up to and connect right wiring portion (66) between last wiring portion (64) and lower wiring portion (65) one side, keep away from in lower wiring portion (65) one side of right wiring portion (66) is connected with left wiring portion (67), contact portion (32) with the side contact of right wiring portion (66).

8. The test loop mechanism of claim 5, wherein: one of them half shell is equipped with spacing groove (91, 92) that correspond respectively with first connecting portion (21) and second connecting portion (31), be equipped with on spacing groove (91, 92) with the groove (93, 94) of dodging that joint structure (4) correspond, another half shell is equipped with clamp plate (81, 82) that correspond with spacing groove (91, 92), and with dodge picture peg (83, 84) that groove (93, 94) correspond, when two half shell combinations are the casing, clamp plate (81, 82) can be inserted and compress tightly in spacing groove (91, 92) first connecting portion (21) and second connecting portion (31) that correspond in spacing groove (91, 92), picture peg (83, 84) can be inserted and dodge in groove (93, 94) and compress tightly pin (11) and joint structure (4) of test resistance (1).

9. The test loop mechanism of claim 3, wherein: action portion (22) extend to test button (5) below, action portion (22) and spiral part (23) are equipped with the first section of bending of one-tenth V type, the department of buckling and test button (5) contact and spacing cooperation of first section of bending, the tip bending type of action portion (22) forms the first contact section that is used for getting the electricity from the major loop.

10. An earth leakage circuit breaker, characterized in that: comprising a test loop mechanism as claimed in any one of claims 1 to 9.