CN214411087U - Leakage protection module and leakage protector - Google Patents

Abstract

The utility model provides a leakage protection module and a leakage protector, which belong to the technical field of electric appliances, and comprise a shell with a containing cavity, and a PCB and a coil assembly in the shell are arranged in the containing cavity, and also comprise a movable contact piece which is arranged in the shell and is electrically connected with the PCB, and a first contact is arranged on the movable contact piece; and the static contact is clamped on the shell and is provided with a second contact in contact fit with the first contact. All install the spare part in the casing, reduce exposing of spare part to improve the dustproof requirement of product, in addition, the installation of each spare part is all fixed a position the installation through the casing, need not to increase locating part, thereby reduces the assembly part of product.

Description

Leakage protection module and leakage protector

Technical Field

The utility model belongs to the technical field of electrical apparatus, a earth-leakage protection device is related to, especially, relate to an earth-leakage protection module and earth-leakage protector.

Background

The leakage protector, called leakage breaker for short, is mainly used for protecting the electric shock of human body with fatal danger when the equipment has leakage fault, has the functions of overload and short circuit protection, can be used for protecting the overload and short circuit of a circuit or a motor, and can also be used for the infrequent switching and starting of the circuit under normal conditions.

However, the existing leakage protection module has a complex structure and more assembly parts, and some parts are exposed, so that the dustproof requirement of the whole product cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provide one kind can be corresponding reduction assembly part to and reduce the exposure of part, satisfy the dustproof earth leakage protection module who requires of product.

The purpose of the utility model can be realized by the following technical proposal: an earth leakage protection module comprising:

the PCB comprises a housing, a coil assembly, a movable contact piece and a first contact piece, wherein the housing is internally provided with an accommodating cavity, the accommodating cavity is internally provided with a PCB and the coil assembly, the movable contact piece is arranged in the housing and is electrically connected with the PCB, and the movable contact piece is provided with the first contact; and the static contact is clamped on the shell and is provided with a second contact in contact fit with the first contact.

In foretell earth leakage protection module, the one end that is provided with the second contact on the static contact is located and holds the intracavity, and the other end of static contact is located and holds the chamber outside.

In the leakage protection module, a groove is arranged on the wall of the accommodating cavity, and a concave part matched with the groove in a clamping manner is arranged on the static contact piece.

In the leakage protection module, at least one side of the groove is provided with a sliding groove which is matched with the static contact piece in a sliding way and is communicated with the groove.

In the leakage protection module, the concave part is in a U-shaped structure, wherein the open end of the concave part is in clamping fit with the groove, and the closed end of the concave part is in abutting fit with the PCB.

In the leakage protection module, a limiting plate which is limited and abutted against the static contact piece is arranged on one side of the sliding groove, which is far away from the opening end of the concave part.

In the leakage protection module, the casing comprises an upper cover and a lower cover which are mutually clamped and matched, and a second mounting cavity which is used as a mounting position of the movable contact piece is arranged on the lower cover, wherein the second mounting cavity is opposite to the groove.

In the leakage protection module, the number of the second mounting cavities is two, and a first mounting cavity serving as a mounting position of the coil assembly is arranged between the two second mounting cavities.

In the leakage protection module, a third mounting cavity is arranged between one end of the first mounting cavity and the wall of the accommodating cavity on the side where the groove is located, and a piezoresistor is mounted in the third mounting cavity.

The utility model also provides a leakage protector, include the leakage protection module.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model provides a pair of leakage protection module all installs spare part in the casing, reduces exposing of spare part to improve the dustproof requirement of product, in addition, the installation of each spare part is all fixed a position the installation through the casing, need not to increase positioning element, thereby reduces the assembly part of product, simplifies the structure of whole product.

(2) The static contact joint is connected to the shell, the stability of installation of the static contact is guaranteed, the assembly efficiency of the leakage protection module is improved, in addition, the static contact part is installed in the shell, the exposed area of the leakage protection module is further reduced, and the dustproof requirement of a product is improved.

(3) The one end setting that is close to the draw-in groove on will resetting key is the inclined plane, reciprocates the guide position of in-process as resetting key along its direction of pressing, guarantees that earth leakage protection module when reseing, and the tripper can be reliable block go into in the draw-in groove of resetting key, improves the straightness accuracy that the tripper removed.

(4) Through first passageway and the second passageway on the depression bar, further guarantee the straightness accuracy when release and reset key remove along the horizontal direction respectively and remove along vertical direction, in addition, through being provided with the bracing piece in the both sides of depression bar, and this bracing piece supports with the movable contact piece and leans on the cooperation, realizes "lifting" of movable contact piece for earth leakage protection device is under the initial test state, and movable contact piece and static contact piece laminate all the time, are in the on-state.

(5) Through setting up spacing portion, distance when control release inserts the depression bar realizes the reliable joint of release and reset key on the one hand, and on the other hand avoids the release to excessively remove and leads to reset key to take place the slope, and influences the reliability that reset key used.

(6) Through setting up piezo-resistor and leaded light post, the detection personnel of being convenient for judge fast that current earth leakage protection module is in the detection phase or is in the stage that resets, improves work efficiency.

(7) Through the nested cooperation between cavity cylinder and the elastic component, location structure when linking to each other as upper cover and lower cover, in addition, through being connected between elastic component and the movable contact spring, guarantee that the first contact on the movable contact spring can contact with the second contact forward on the static contact spring when the earth leakage protection module resets, improve the electrically conductive effect between movable contact spring and the static contact spring.

Drawings

Fig. 1 is a schematic structural diagram of an earth leakage protection module according to the present invention.

Fig. 2 is a schematic diagram of a local structure of an earth leakage protection module according to the present invention.

Fig. 3 is a schematic diagram of a local structure of the earth leakage protection module according to the present invention.

Fig. 4 is a schematic diagram of a local structure of the earth leakage protection module according to the present invention.

Fig. 5 is a schematic structural diagram of a release according to a preferred embodiment of the present invention.

Fig. 6 is a schematic structural view of a pressing rod according to a preferred embodiment of the present invention.

Fig. 7 is a schematic view of another perspective of the pressing rod according to a preferred embodiment of the present invention.

Fig. 8 is a schematic structural view of a lower cover according to a preferred embodiment of the present invention.

Fig. 9 is a schematic structural view of the upper cover according to a preferred embodiment of the present invention.

In the figure, 100, the housing; 110. an upper cover; 111. a hollow cylinder; 112. an elastic member; 120. a lower cover; 121. a first mounting cavity; 122. a second mounting cavity; 123. a guide groove; 124. a third mounting cavity; 125. a partition plate; 126. a fourth mounting cavity; 127. an accommodating chamber; 128. a groove; 1281. a chute; 1282. a limiting plate; 200. a test key; 300. a reset key; 310. a card slot; 320. a bevel; 400. a coil assembly; 410. a trip coil; 420. a core bar; 430. a release; 431. a first connecting groove; 432. a second connecting groove; 440. a transformer; 500. a PCB board; 600. a movable contact spring; 610. an output line; 620. a first contact; 700. a static contact piece; 710. a second contact; 720. a recess; 800. a pressure lever; 810. a first channel; 820. a second channel; 830. a support bar; 840. a limiting part; 841. a first limiting part; 842. a second limiting part; 900. a voltage dependent resistor; 1000. a light guide pillar.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

As shown in fig. 1 to 9, the present invention provides a leakage protection module, including:

a housing 100 having a receiving chamber 127 therein, wherein a test key 200 and a reset key 300 are provided on the housing 100;

the PCB 500 is arranged in the accommodating cavity 127 and is electrically connected with the test key 200;

the coil assembly 400 is installed in the accommodating cavity 127 and electrically connected with the PCB 500, wherein the connection or disconnection with the reset key 300 is realized by whether the coil assembly 400 is powered;

a movable contact piece 600 installed in the accommodating cavity 127 and electrically connected to the PCB 500, wherein one end of the movable contact piece 600 is connected to an output line 610, and the other end of the movable contact piece 600 is provided with a first contact 620;

and a static contact 700 mounted on the housing 100, wherein one end of the static contact 700 is provided with a second contact 710 for contacting and matching the first contact 620, and the other end of the static contact 700 is connected to an input line (not shown).

The utility model provides a pair of leakage protection module all installs spare part in casing 100, reduces exposing of spare part to improve the dustproof requirement of product, in addition, the installation of each spare part is all fixed a position the installation through casing 100, need not to increase positioning element, thereby reduces the assembly part of product, simplifies the structure of whole product.

Preferably, the static contact 700 is clamped on the housing 100, wherein one end of the static contact 700, at which the second contact 710 is arranged, is located in the housing 100, and one end of the static contact 700, at which the input line is connected, is located outside the housing 100.

In this embodiment, with the joint of static contact 700 on casing 100, guaranteed the stability of static contact 700 installation, improved the efficiency of earth leakage protection module assembly, in addition, the partial installation of static contact 700 is in casing 100, further reduces the exposed area of earth leakage protection module, improves the dustproof requirement of product.

Preferably, when the coil assembly 400 is in a power-off state, a snap fit is formed between one end of the coil assembly 400 facing the reset key 300 and the reset key 300; when the coil assembly 400 is in the energized state, the end of the coil assembly 400 facing the reset key 300 is disengaged from the reset key 300.

In this embodiment, when the coil assembly 400 is in a power-off state, the coil assembly 400 and the reset key 300 are in clamping fit, so that the degree of freedom of movement of the reset key 300 along the pressing direction thereof is limited, and misoperation of a tester is avoided.

Further preferably, the coil assembly 400 includes a trip coil 410, and a core rod 420 is nested in the trip coil 410, wherein a trip unit 430 is connected to one end of the core rod 420, and the reset key 300 is provided with a clamping groove 310 which is in clamping fit with the trip unit 430.

In the present embodiment, when the trip coil 410 is in a power-off state, the trip unit 430 is clamped into the card slot 310; when the trip coil 410 is in the power-on state, the trip unit 430 exits the card slot 310, the clamping between the trip unit 430 and the reset key 300 is released, at this time, the reset key 300 is pressed down, so that the trip coil 410 loses power again, the trip unit 430 extends out again, and is clamped with the reset key 300 again in the reset process, and the reset stroke of the reset key 300 is controlled.

Further preferably, the release 430 is substantially L-shaped, and one end of the release 430 is snap-fit with the core rod 420, and the other end of the release 430 is snap-fit with the reset key 300, wherein the reset key 300 has an inclined surface 320 at an end near the slot 310.

In this embodiment, the inclined surface 320 is disposed at an end of the reset key 300 close to the card slot 310, and serves as a guiding portion of the reset key 300 during the up-and-down movement along the pressing direction, so as to ensure that the release 430 can be reliably clamped into the card slot 310 of the reset key 300 when the earth leakage protection module is reset, and improve the moving linearity of the release 430.

Further preferably, two ends of the trip unit 430 are respectively provided with a U-shaped connecting groove, namely a first connecting groove 431 and a second connecting groove 432, the first connecting groove 431 is in clamping fit with the core rod 420, and the second connecting groove 432 is in clamping fit with the clamping groove 310, wherein an opening direction of the first connecting groove 431 is arranged in a vertical direction, and an opening direction of the second connecting groove 432 is arranged in a horizontal direction.

Preferably, a pressing rod 800 is arranged between the release 430 and the reset key 300, and a first channel 810 and a second channel 820 which are communicated with each other are arranged on the pressing rod 800, wherein the first channel 810 is used as a moving channel when the release 430 moves horizontally, and the second channel 820 is used as a moving channel when the reset key 300 moves vertically.

It is further preferable that a support bar 830 is provided on the pressing bar 800, and the extending direction of the support bar 830 is perpendicular to the direction in which the trip 430 moves horizontally and the direction in which the reset key 300 moves vertically, wherein the support bar 830 is in abutting engagement with the movable contact piece 600.

In this embodiment, the first channel 810 and the second channel 820 on the pressing rod 800 further ensure the straightness of the release 430 and the reset key 300 when moving in the horizontal direction and the vertical direction, respectively, and in addition, the support rods 830 are arranged on two sides of the pressing rod 800, and the support rods 830 are abutted and matched with the movable contact piece 600, so as to realize the "lifting" of the movable contact piece 600, so that the movable contact piece 600 and the static contact piece 700 are always attached and in a conducting state in an initial test state of the leakage protection device.

Preferably, a limiting portion 840 is disposed on one side of the pressing rod 800 close to the release 430, wherein the limiting portion 840 abuts against and cooperates with the release 430.

In an embodiment, the limiting portion 840 is arranged to control the distance of the release 430 inserted into the pressing rod 800, so that on one hand, reliable clamping between the release 430 and the reset key 300 is realized, and on the other hand, the situation that the reset key 300 is inclined due to excessive movement of the release 430, which affects the reliability of the use of the reset key 300, is avoided.

Preferably, the limiting portion 840 includes a first limiting portion 841 and a second limiting portion 842, and the first limiting portion 841 and the second limiting portion 842 are disposed in a vertically staggered manner along the moving direction of the reset key 300, wherein the position of the first limiting portion 841 corresponds to the position of the open end of the first connecting groove 431, and the position of the second limiting portion 842 corresponds to the position of the closed end of the first connecting groove 431.

Preferably, the housing 100 includes an upper cover 110 and a lower cover 120 which are snap-fitted to each other, and a first mounting cavity 121 is provided on the lower cover 120, and a second mounting cavity 122 is provided at each portion of the first mounting cavity 121, wherein the first mounting cavity 121 serves as a mounting position of the trip coil 410, the trip 430, and the press rod 800, and the second mounting cavity 122 serves as a mounting position of the movable contact 600.

Further preferably, a guide groove 123 is provided on the cavity wall of the first mounting cavity 121, and the guide groove 123 is in snap fit with the support rod 830, wherein the second mounting cavity 122 on the side close to the guide groove 123 is used as the mounting position of the static contact 700, the second mounting cavity 122 on the side far from the guide groove 123 is used as the mounting position of the movable contact 600, and the movable contact 600 and the second mounting cavity 122 are in snap fit between the static contact 700 and the second mounting cavity 122.

Preferably, a third mounting cavity 124 is further disposed on the lower cover 120, and the third mounting cavity 124 is separated from the first mounting cavity 121 by a partition 125, wherein a varistor 900 electrically connected to the PCB 500 is mounted in the third mounting cavity 124, and the varistor 900 corresponds to the position of the light guide pillar 1000 mounted on the upper cover 110.

In this embodiment, through setting up piezo-resistor 900 and leaded light post 1000, the detection personnel of being convenient for judge fast that current earth leakage protection module is in the detection phase or is in the stage that resets, improves work efficiency.

Preferably, a fourth mounting cavity 126 is further disposed on the lower cover 120, and the fourth mounting cavity 126 and the third mounting cavity 124 are respectively located at two ends of the first mounting cavity 121, wherein a transformer 440 in the coil assembly 400 is mounted in the fourth mounting cavity 126.

Preferably, a groove 128 is provided on the wall of the receiving cavity 127, and a recess 720 for snap-fitting with the groove 128 is provided on the stationary contact 700.

It is further preferred that at least one side of the groove 128 is provided with a slide groove 1281 slidably engaged with the stationary contact 700 and communicating with the groove 128.

Further preferably, the recess 720 is provided in a U-shaped configuration, wherein an open end of the recess 720 is snap-fitted into the groove 128 and a closed end of the recess 720 is in abutting engagement with the PCB board 500.

Further preferably, a limit plate 1282 which is limited and abutted against the static contact piece 700 is arranged on one side of the sliding chute 1281 far away from the opening end of the concave part 720.

Preferably, the upper cover 110 is provided with two hollow cylinders 111, and an elastic member 112 is embedded in each hollow cylinder 111, wherein one end of the elastic member 112 is connected to the movable contact 600, and the other end of the elastic member 112 is a free end.

In this embodiment, the hollow column 111 and the elastic member 112 are nested to serve as a positioning structure when the upper cover 110 is connected to the lower cover 120, and in addition, the elastic member 112 is connected to the movable contact piece 600 to ensure that the first contact 620 on the movable contact piece 600 can be in positive contact with the second contact 710 on the fixed contact piece 700 when the earth leakage protection module is reset, so as to improve the conductive effect between the movable contact piece 600 and the fixed contact piece 700.

It is noted that the description herein of "first," "second," "a," etc. is for descriptive purposes only and is not intended to indicate or imply relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. The terms "connected," "fixed," and the like are to be construed broadly, e.g., "fixed" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (10)

1. An earth leakage protection module comprises a shell (100) with a containing cavity (127) arranged therein, and a PCB (500) and a coil assembly (400) are arranged in the containing cavity (127), and is characterized by further comprising a movable contact piece (600) which is arranged in the containing cavity (127), is electrically connected with the PCB (500), and is provided with a first contact (620) on the movable contact piece (600); the static contact piece (700) is clamped on the shell (100), and a second contact (710) in contact fit with the first contact (620) is arranged on the static contact piece (700).

2. The earth leakage protection module according to claim 1, wherein the end of the static contact (700) on which the second contact (710) is arranged is located inside the accommodating chamber (127), and the other end of the static contact (700) is located outside the accommodating chamber (127).

3. Residual current protection module according to claim 2, characterized in that a recess (128) is provided in the wall of the receiving chamber (127) and a recess (720) for snap-fitting with the recess (128) is provided in the static contact (700).

4. Residual current leakage protection module according to claim 3, characterized in that at least one side of the recess (128) is provided with a runner (1281) which is in sliding engagement with the static contact (700) and communicates with the recess (128).

5. A residual current protection module according to claim 3, characterized in that the recess (720) is arranged in a U-shaped configuration, wherein the open end of the recess (720) is snap-fitted into the groove (128) and the closed end of the recess (720) is in abutting engagement with the PCB board (500).

6. The earth leakage protection module according to claim 4, wherein the chute (1281) is provided with a limiting plate (1282) which is limited and abutted against the static contact piece (700) on the side far away from the opening end of the recess (720).

7. A residual current protection module according to claim 3, characterized in that the housing (100) comprises an upper cover (110) and a lower cover (120) which are snap-fitted to each other, and a second mounting cavity (122) is provided on the lower cover (120) as a mounting position of the movable contact (600), wherein the second mounting cavity (122) is disposed opposite to the recess (128).

8. The earth leakage protection module according to claim 7, characterized in that the number of the second mounting cavities (122) is two, and a first mounting cavity (121) is arranged between the two second mounting cavities (122) as a mounting position of the coil assembly (400).

9. The earth leakage protection module according to claim 7, wherein a third mounting cavity (124) is arranged between one end of the first mounting cavity (121) and the wall of the accommodating cavity (127) on the side of the groove (128), and the piezoresistor (900) is mounted in the third mounting cavity (124).

10. A earth-leakage protector, characterized in that it comprises an earth-leakage protection module according to any one of claims 1 to 9.

Images