CN112017899A - Electrical switch - Google Patents

Abstract

The invention provides an electrical switch, and relates to the technical field of electrical switches. The electrical switchgear comprises: the support frame is fixed with a static contact mechanism; the contact plate frame can move and is fixed with a movable contact mechanism; the push rod is arranged at the supporting frame and can move, and the touch panel frame is positioned at the rear side of the push rod; and the seesaw comprises a first end and a second end which swing around the fulcrum of the seesaw, the first end is positioned on the front side of the push rod and is pressed by the push rod, and the second end is positioned on the rear side of the push rod and pushes the contact plate frame to move, so that the movable contact mechanism is separated from the fixed contact mechanism. The electrical switchgear ensures reliability of a seesaw mechanism that performs a direct-off operation, relative to the prior art.

Description

Electrical switch

Technical Field

The invention relates to the technical field of electrical switches, in particular to an electrical switch.

Background

Electrical switches, such as stroke switches, push-button switches, micro-switches or transfer switches, are often overloaded, short-circuited and fusion welded, i.e. the fixed contact of the fixed contact mechanism and the movable contact of the movable contact mechanism of the electrical switch are fusion welded together, wherein the fusion welded phenomenon of the stroke switch is more serious, if the contacts cannot be disconnected, the circuit cannot be normally disconnected, which affects the normal operation of electrical equipment, and even more, a safety accident occurs.

At this time, a direct disconnection operation is required to open the circuit. The direct disconnection operation means that an actuator of the electric switch directly separates the moving contact from the fixed contact by a specified action of an inelastic component (namely, a spring is not adopted), a seesaw is usually used for executing the action, and the existing seesaw has poor reliability and cannot be separated under the condition that the moving contact and the fixed contact are welded.

Disclosure of Invention

The invention aims to solve the problems to a certain extent: the seesaw mechanism performing the direct disconnection operation has poor reliability, and the seesaw is inconvenient to assemble in the electrical switch.

In order to solve the above problems, the present invention provides an electrical switchgear, comprising:

the support frame is fixed with a static contact mechanism;

the contact plate frame can move and is fixed with a movable contact mechanism;

the push rod is arranged at the supporting frame and can move, and the touch panel frame is positioned at the rear side of the push rod; and

the seesaw comprises a first end and a second end, the first end swings around a fulcrum of the seesaw, the first end is located on the front side of the push rod and is pressed by the push rod, and the second end is located on the rear side of the push rod and pushes the contact plate frame to move, so that the movable contact mechanism is separated from the fixed contact mechanism.

Further, the length from the first end to the fulcrum is greater than or equal to the length from the second end to the fulcrum.

Furthermore, the seesaw comprises a connecting arm and two parallel supporting arms, the supporting arms comprise two end parts and respectively form the first end and the second end correspondingly, and the connecting arm connects the two supporting arms at the first end.

Furthermore, a concave cavity which is concave inwards is formed on the surface of one side outside the support frame, grooves are respectively formed in two opposite side walls of the concave cavity, and the grooves are communicated with the surface of one side outside the support frame;

the supporting points of the seesaw form two rotating shafts and are respectively fixed on one of the supporting arms, the rotating shafts are arranged in the grooves in a one-to-one correspondence mode, and the push rods are arranged between the two supporting arms.

Further, the first side of touch panel frame with the push rod sets up relatively, two second sides of touch panel frame with two intersections of the first side of touch panel frame form a depressed part respectively, the second end is located in the depressed part.

Furthermore, two static contact mechanisms which are arranged in a clearance mode are arranged in the support frame, a containing space is formed in the support frame, the first end of the support frame is located in the containing space, and the containing space, the seesaw, the push rod and the contact plate frame are sequentially arranged between the two static contact mechanisms.

Further, be located the fulcrum with between the second end the seesaw is the crook shaped arm body of undercut, the second end is bellied hook point portion that makes progress, the push rod promotes during first end, hook point portion promotes the touch panel frame.

Furthermore, the electrical switch device also comprises a first guide mechanism, the first guide mechanism is respectively formed on the push rod and the touch plate frame, and the first guide mechanism is used for guiding the touch plate frame to move up and down;

and/or the electrical switch also comprises a second guide mechanism, the second guide mechanism is respectively formed on the push rod and the support frame, and the second guide mechanism is used for guiding the push rod to move up and down.

Further, the push rod with the touch panel frame passes through the shell fragment and is connected, the push rod with the support frame passes through spring coupling.

Further, the electrical switch is a stroke switch, a button switch, a microswitch or a change-over switch.

The invention has the advantages that the length of the seesaw extends from the front side of the push rod to the rear side of the push rod and can be contacted with the contact plate frame, and the fulcrum can be selected to be arranged close to the contact plate frame according to actual requirements; thereby making the moment arm between the first end and the fulcrum longer and thus a larger moment arm can be applied to the touch pad holder to ensure the movable contact mechanism is separated from the stationary contact mechanism, thereby ensuring the reliability of the seesaw mechanism performing the direct disconnection operation.

Further, due to the assembly and assembly of the electrical switch device, the electrical switch device is small in size and has a large number of internal parts, and the seesaw is matched with the support frame, the push rod and the touch plate frame at the same time in the embodiment, which brings great challenges to assembly and production.

Therefore, the structural characteristics of the two support arms and the connecting arm are utilized, the position of the groove is utilized, the rotating shaft can easily enter the groove from the surface of one side outside the support frame, the push rod and the contact plate frame are usually fixed together for positioning and assembling the complete seesaw, and the push rod and the contact plate frame are sequentially arranged between the two support arms, so that the seesaw, the push rod and the contact plate frame are convenient to assemble, and the assembling efficiency of the electric switch device is greatly improved.

Drawings

Fig. 1 is a first schematic perspective view of the electrical switch of the present invention;

FIG. 2 is a schematic perspective view of the seesaw of the present invention;

fig. 3 is a second schematic perspective view of the electrical switch of the present invention;

FIG. 4 is a schematic side view of the seesaw of the present invention in cooperation with the push rod and the touch plate frame;

fig. 5 is a third schematic perspective view of the electrical switch of the present invention;

fig. 6 is a fourth schematic perspective view of the electrical switch of the present invention;

fig. 7 is an enlarged schematic view at P in fig. 6.

Description of reference numerals:

100 of a seesaw; 111 a rotating shaft; 120 support arms; 130 connecting the arm; 200 push rods; 210 pushing the arm; 300, a touch plate frame; 310 moving the contact mechanism; 311 moving contact; 321 a first side; 322 a second side; 323 a recessed portion; 400, a support frame; 403 a cavity; 404 a groove; 410 a stationary contact mechanism; 411, static contact; 420 a receiving space; 501 elastic pieces; 502 a spring; 510 a first guide mechanism; 511 a first boss; 512 first guide grooves; 520 a second guiding mechanism; 521 a second boss; 522 a second guide groove; 530 operate the lever.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", and the like, which indicate orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 7, the present embodiment provides an electrical switchgear including: a support frame 400, a touch panel frame 300, a seesaw 100, and a push rod 200. The supporting frame 400 is provided with a stationary contact mechanism 410, and a receiving space 420 is formed in the supporting frame 400; the contact plate holder 300 is provided with a movable contact mechanism 310, the contact plate holder 300 can be disposed in the support frame 400 and can be moved, and the contact plate holder 300 can be further disposed adjacent to the support frame 400 to make or separate the movable contact mechanism 310 from the stationary contact mechanism 410. For example, the contact plate frame 300 can reciprocate up and down relative to the support frame 400, so that the movable contact 311 of the movable contact mechanism 310 contacts with or separates from the fixed contact 411 of the fixed contact mechanism 410. It should be noted that, for those skilled in the art, the seesaw 100 functions as a lever, and has a first end and a second end that swing around a fulcrum thereof. Therefore, in the present embodiment, the fulcrum of the seesaw 100 is disposed in the support frame 400, the first end is disposed in the receiving space 420 and is located at the front side of the push rod 200, that is, the first end is located at the front side of the push rod 200, and the second end can be disposed at the touch panel frame 300 and push the touch panel frame 300 to move; the push rod 200 is disposed in the support frame 400 and can move, for example, move up and down in a reciprocating manner relative to the support frame 400, the touch panel frame 300 is disposed at the rear side of the push rod 200, the push rod 200 pushes the first end to move, for example, the push rod 200 is formed with a push arm 210, and the push arm 210 pushes the first end to move.

The working process is that after the operating rod 530 of the electrical switch is touched by a person or an operating device, the push rod 200 is pushed to move, and meanwhile, the push arm 210 pushes the first end to swing, and when the first end is pushed to an extreme position by the push arm 210, the first end is attached to the side wall of the accommodating space 420, and the second end tilts through the lever action, so that the contact plate frame 300 is pushed to move, and the moving contact 311 of the moving contact mechanism 310 is separated from the fixed contact 411 of the fixed contact mechanism 410, and the process is the direct disconnection operation in the background technology.

On the contrary, the resetting of the touch panel frame 300 makes the movable contact 311 of the movable contact mechanism 310 contact with the fixed contact 411 of the fixed contact mechanism 410, and relies on an elastic component installed in the electrical switch, especially in the stroke switch, so that after the operating rod 530 is separated from the push rod 200, the elastic component makes the push rod 200 and the touch panel frame 300 reset respectively, thereby making the movable contact 311 keep contact with the fixed contact 411. The process of individually resetting the push rod 200 and the touch panel holder 300 will be described in detail as much as possible in the following of the present embodiment, and will not be described again here.

First, the inventor of the present invention has found, after analyzing the seesaw 100 of the conventional electrical switch, that the main reason for the poor reliability of the mechanism of the seesaw 100 performing the direct-disconnection operation is that both ends of the conventional seesaw 100 are only respectively disposed at the push rod 200 and the contact frame 300, and the contact frame 300 is lifted by pressing down the push rod 200, so that the length of the force arm between the end of the seesaw 100 and the fulcrum thereof is shorter, and the push rod 200 cannot form an effective pushing moment on the end of the seesaw 100 during the direct-disconnection operation, which results in the poor reliability of the mechanism of the seesaw 100 performing the direct-disconnection operation.

For this purpose, the present invention increases the length of the seesaw 100, so that the length of the seesaw 100 extends from the front side of the push rod 200 to the rear side of the push rod 200 and can contact with the touch panel frame 300, and the fulcrum can be selectively arranged close to the touch panel frame 300 according to the actual requirement; thereby making the moment arm between the first end to the fulcrum longer and thus a larger moment arm can be applied to the touch pad holder 300 to ensure the movable contact mechanism 310 is separated from the stationary contact mechanism 410, thereby ensuring the reliability of the seesaw 100 mechanism performing the direct-opening operation.

Further, the length from the first end to the fulcrum is greater than or equal to the length from the second end to the fulcrum.

The lever principle is fully utilized, the fulcrum is made to be close to the touch plate frame 300 as much as possible, and therefore the force arm of the push arm 210 to the seesaw 100 is increased.

Further, the seesaw 100 includes a connecting arm 130 and two parallel support arms 120, the support arms 120 include two end portions and respectively form a first end and a second end, and the connecting arm 130 connects the two support arms 120 at the first end.

At least a part of the push rod 200 and the touch panel frame 300 can be held between the two support arms 120, and although the holding space 420 is formed in the support frame 400, the arm of the seesaw 100 is a problem to bypass the push rod 200 and act on the touch panel frame 300; the length of the seesaw 100 is limited between the push rod 200 and the contact frame 300 in the prior art, mainly because the seesaw 100 has a plate shape, and the plate shape is difficult to act on the contact frame 300 by bypassing the push rod 200, thereby further increasing the difficulty of increasing the length of the seesaw 100.

The inventor of the present invention modifies the seesaw 100 into two arms 120 and a connecting arm 130 and places the push rod 200 between the two arms 120 while using the receiving space 420, so that the seesaw 100 ingeniously acts on the touch panel frame 300 after bypassing the push rod 200, thereby achieving the lever effect and solving the blocking problem of the push rod 200, and achieving a very good effect.

Furthermore, a concave cavity 403 which is concave inwards is formed on the surface of one side of the outer side of the support frame 400, grooves 404 are respectively formed on two opposite side walls of the concave cavity 403, and the grooves 404 are communicated with the surface of one side of the outer side of the support frame 400;

the fulcrum of the seesaw 100 forms two rotating shafts 111 and is fixed at one of the support arms 120, the rotating shafts 111 are correspondingly arranged in the grooves 404, and the push rod 200 is held between the two support arms 120.

Due to the assembly and assembly of the electrical switchgear, the electrical switchgear is small in size and has a large number of internal components, and the seesaw 100 in this embodiment is simultaneously matched with the support frame 400, the push rod 200 and the touch panel frame 300, which brings a great challenge to assembly and production.

Therefore, by utilizing the structural characteristics of the two support arms 120 and the connecting arm 130 and the position of the groove 404, the rotating shaft 111 can easily enter the groove 404 from the surface of one side outside the supporting frame 400 to complete the positioning and assembling of the seesaw 100, usually, the push rod 200 and the contact plate frame 300 are fixed together, and then the push rod 200 and the contact plate frame 300 are sequentially arranged between the two support arms 120, so that the seesaw 100, the push rod 200 and the contact plate frame 300 are conveniently assembled, and the assembling efficiency of the electrical switch device is greatly improved.

Further, the first side 321 of the touch panel holder 300 is disposed opposite to the push rod 200, two second sides 322 of the touch panel holder 300 intersect with the first side 321 of the touch panel holder 300 to form a recess 323, respectively, and the two support arms 120 at the second end are disposed in the recess 323, that is, the second end is disposed in the recess 323.

When the seesaw support is used, the other end 130 of the seesaw pushes the wall body of the concave part 323 of the contact plate frame 300, so that the contact plate frame 300 moves, and the other end of the seesaw 100 is arranged in the concave part 323, so that the space outside the contact plate frame 300 occupied by the other end 130 of the seesaw can be reduced, the cooperation among the contact plate frame 300, the support frame 400 and the seesaw 100 is more compact, and more space is saved.

Further, two stationary contact mechanisms 410 are installed in the supporting frame 400, the accommodating space 420, the seesaw 100, the push rod 200 and the contact frame 300 are sequentially disposed between the two stationary contact mechanisms 410, preferably, the long sides of the two stationary contact mechanisms 410 are adjacent and spaced, and the accommodating space 420, the seesaw 100, the push rod 200 and the contact frame 300 are sequentially disposed between the two stationary contact mechanisms 410 along the long side direction of the stationary contact mechanisms 410.

For a stroke switch, each stationary contact mechanism 410 is usually fixed with a stationary contact 411, and the stationary contacts 411 are usually used in pairs, that is, two or four stationary contact mechanisms are usually used. Meanwhile, in order to ensure the normal use of the fixed contact 411, the fixed contact mechanisms 410 are arranged at intervals, so that the space between the fixed contact mechanisms 410 is not fully utilized, and the space is wasted. On the other hand, since the housing of the electrical switch is a national standard, such as a travel switch, and the space in the housing is limited, the length of the seesaw in the prior art is kept within a short range, and therefore, the space between the two stationary contact mechanisms 410 is formed as a receiving space 420, and the push rod 200 and the contact frame 300 are placed between the two support arms 120 in cooperation with the structure of the seesaw 100, thereby not only fully utilizing the space between the two stationary contact mechanisms 410, but also fully extending the length of the seesaw 100 and facilitating the use of the lever effect.

Further, the seesaw 100 between the fulcrum and the second end is a hook-shaped arm body recessed downward, the second end is a hook tip portion protruding upward, and when the push rod 200 pushes the first end, the hook tip portion pushes the touch panel frame 300.

Because the hook-shaped structure is an arch structure, and the arch structure has the characteristics of strong deformation resistance and capability of bearing more acting forces, the seesaw 100 positioned between the fulcrum and the second end is a downward-concave hook-shaped arm body, so that the structural strength of the seesaw 100 can be enhanced, and the use reliability of the seesaw 100 is further improved.

Further, the electrical switchgear further comprises a first guide mechanism 510, the first guide mechanism 510 is respectively formed on the push rod 200 and the touch panel holder 300, and the first guide mechanism 510 is used for guiding the touch panel holder 300 to move up and down;

and/or, the electrical switch further comprises a second guiding mechanism 520, the second guiding mechanism 520 is respectively formed on the push rod 200 and the supporting frame 400, and the second guiding mechanism 520 is used for guiding the push rod 200 to move up and down.

It should be noted that "and/or" is used herein to mean that the electrical switchgear further includes the first guide mechanism 510 and the second guide mechanism 520, or that the electrical switchgear includes only one of the first guide mechanism 510 and the second guide mechanism 520.

The first guide mechanism 510 includes a first protrusion 511 and a first guide groove 512; the first protrusion 511 is formed at the push rod 200, the first guide groove 512 is formed at the touch panel holder 300, the first guide groove 512 extends in a vertical direction, and the first protrusion 511 is disposed in the first guide groove 512 and moves up and down in an extending direction thereof.

The second guide mechanism 520 includes a second guide slot 522 and a second protrusion 521, the second guide slot 522 forms the position of the push rod 200 and extends along the vertical direction, the push rod 200 is disposed in the support frame 400, the second protrusion 521 is formed in the support frame 400, and the second protrusion 521 can be retained in the second guide slot 522 and move relatively along the extending direction.

Further, the push rod 200 is connected with the touch plate frame 300 through a spring plate 501, and the push rod 200 is connected with the support frame 400 through a spring 502.

The aforementioned "procedure of respectively resetting the push rod 200 and the touch panel frame 300" is described herein, the push rod 200 is pressed down by the operation rod 530 through the elastic sheet 501 to raise the touch panel frame 300, and the movable contact 311 is separated from the fixed contact 411, and after the operation rod 530 eliminates the pressing down of the push rod 200, the spring 502 connected to the support frame 400 at the bottom of the push rod 200 jacks the push rod 200, and the elastic sheet 501 operates again to lower the touch panel frame 300, so that the movable contact 311 is kept in contact with the fixed contact 411, which is also a normal use procedure of the electrical switch, especially the travel switch, and is known to those skilled in the art, and thus, the above-mentioned procedure is not described too much.

Further, the electrical switch may be a stroke switch, a push button switch, a microswitch or a transfer switch. Preferably, the electrical switch is a travel switch.

Because various electrical switchers are provided with moving contacts and static contacts which are welded together, and the overall dimensions of most electrical switchers have the national standard, the internal space of the electrical switchers is limited, so that the electrical switchers can be used when the reliability of direct disconnection operation of the electrical switchers needs to be ensured, and the overall dimensions of the electrical switchers are not influenced so as to meet the national requirements.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.

Claims (10)

1. An electrical switch, comprising:

a support frame (400) to which a stationary contact mechanism (410) is fixed;

a contact plate frame (300) which can move and is fixed with a movable contact mechanism (310);

a push rod (200) disposed at the support frame (400) and capable of moving, the touch panel frame (300) being located at a rear side of the push rod (200); and

seesaw (100), including first end and the second end around its fulcrum wobbling, first end is located the front side of push rod (200) and by push rod (200) are pressed, the second end is located push rod (200) rear side and promotion contact plate frame (300) remove, so that movable contact mechanism (310) with stationary contact mechanism (410) separation.

2. An electrical switch according to claim 1, wherein the length of the first end to the fulcrum is greater than or equal to the length of the second end to the fulcrum.

3. An electrical switching apparatus as claimed in claim 1 or 2, wherein said seesaw (100) comprises a connecting arm (130) and two parallel arms (120), said arms (120) comprising two ends and respectively forming said first end and said second end, said connecting arm (130) connecting said two arms (120) at said first end.

4. The electrical switching apparatus according to claim 3, wherein a cavity (403) is formed on one side surface of the outer side of the supporting frame (400) and is recessed inward, two opposite side walls of the cavity (403) are respectively provided with a groove (404), and the grooves (404) are communicated with one side surface of the outer side of the supporting frame (400);

the supporting points of the seesaw (100) form two rotating shafts (111) and are respectively fixed on one supporting arm (120), the rotating shafts (111) are arranged in the grooves (404) in a one-to-one correspondence mode, and the push rods (200) are arranged between the two supporting arms (120).

5. An electrical switch according to claim 3, characterized in that the first side (321) of the contact plate holder (300) is arranged opposite to the push rod (200), and that two second sides (322) of the contact plate holder (300) intersect with two first sides (321) of the contact plate holder (300) to form one recess (323), respectively, the second end being located in the recess (323).

6. The electrical switch of claim 1, wherein two said stationary contact mechanisms (410) are disposed in said supporting frame (400) with a gap therebetween, a receiving space (420) is formed in said supporting frame (400), said first end is located in said receiving space (420), and said receiving space (420), said seesaw (100), said push rod (200) and said contact plate frame (300) are sequentially disposed between two said stationary contact mechanisms (410).

7. An electrical switching apparatus as claimed in claim 3, wherein said seesaw (100) between said fulcrum and said second end is formed as a downwardly concave hook-shaped arm, said second end is formed as an upwardly convex hook tip portion, and said hook tip portion pushes said contact plate frame (300) when said push rod (200) pushes said first end.

8. The electrical switchgear according to any of claims 1, 2, 4 to 7, further comprising a first guiding mechanism (510), wherein the first guiding mechanism (510) is formed on the push rod (200) and the contact plate rack (300), respectively, and the first guiding mechanism (510) is used for guiding the contact plate rack (300) to move up and down;

and/or the electrical switch device further comprises a second guide mechanism (520), the second guide mechanism (520) is respectively formed on the push rod (200) and the support frame (400), and the second guide mechanism (520) is used for guiding the push rod (200) to move up and down.

9. An electrical switching apparatus as claimed in any one of claims 1, 2 and 4 to 7, wherein the push rod (200) is connected to the contact plate frame (300) by a spring plate (501), and the push rod (200) is connected to the supporting frame (400) by a spring (502).

10. An electrical switch according to claim 1, characterized in that the electrical switch is a stroke switch, a push button switch, a microswitch or a diverter switch.

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