CN220171982U

CN220171982U - Safety knife switch

Info

Publication number: CN220171982U
Application number: CN202321431630.5U
Authority: CN
Inventors: 赖智丹; 陈智兵
Original assignee: Shanglian Holding Group Co ltd
Current assignee: Shanglian Holding Group Co ltd
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2023-12-12
Anticipated expiration: 2033-06-07

Abstract

The utility model provides a safety knife switch, which belongs to the technical field of knife switches and comprises a base, a wire holder, a movable contact blade, a ceramic strip, a handle, a clamping seat and an upper cover, wherein the wire holder is arranged in the middle of the upper surface of the base; according to the utility model, the upper cover is arranged to be in a hollow semi-cylindrical shape, and the inner radius of the upper cover is equal to the length of the movable contact blade, so that the movable contact blade is always positioned in the upper cover in the process of driving the movable contact blade to rotate along the wire holder through the handle and the ceramic strip, the movable contact blade is prevented from being exposed in the air when the knife switch is closed or opened, an operator cannot contact the movable contact blade, the electric shock prevention effect is achieved, and the safety of the operator is ensured.

Description

Safety knife switch

Technical Field

The utility model relates to the technical field of knife switches, in particular to a safety knife switch.

Background

A knife switch is an electrical switch, commonly used to control a power source or load in an electrical circuit, and is typically comprised of a handle, a stationary contact point, and a movable contact point that is separated from the stationary contact point when the handle is in an open position, and the electrical circuit is broken; when the handle is in the closed position, the moving contact point is in contact with the fixed contact point, the circuit is closed, the name of the knife switch derives from the handle being shaped like a blade, and there is a feel during operation like a "cut" circuit;

when the handle is in the closed position, the movable contact blade is normally wrapped by the plastic shell on the knife switch, so that the effect of preventing electric shock is achieved, when the handle is in the open position, the movable contact blade is exposed to air, when the current passing through the knife switch is large, the movable contact blade on the knife switch is slowly close to the fixed electric shock, the current is easy to break through the air, an electric arc is generated, at the moment, if an operator carelessly touches the movable contact blade, the danger of electric shock can occur, and when the conventional knife switch is closed, the conventional knife switch completely depends on the holding force of the fixed electric shock, the contact failure is easy, the contact failure between the fixed electric shock and the movable electric shock is caused, the resistance is increased, a large amount of heat is generated when the current passes through, and the burning condition of the knife switch is caused, so that the safety knife switch is designed to solve the problems.

Disclosure of Invention

The utility model aims to solve the problems in the background art and provides a safety knife switch.

The utility model aims to solve the technical problem of providing a safety knife switch which solves the problem that when a handle is in an opening position, a movable contact blade of the conventional knife switch is exposed to air, and when the knife switch is opened, an operator contacts the movable contact blade to cause electric shock.

The utility model provides a safe type knife switch, includes base, mount pad, movable contact blade, ceramic strip, handle, grip slipper and upper cover, the upper surface mid-mounting of base has the mount pad, rotatory being provided with movable contact blade on the mount pad, the fixed ceramic strip that is provided with in top of movable contact blade, the upper surface central authorities of ceramic strip are fixed and are provided with the handle, the grip slipper is installed in the upper surface left side of base, the upper surface of base is provided with the upper cover through the bolt fastening.

Preferably, the wire holder, the movable contact blade and the clamping seat are all provided with 3, and 3 penetrating grooves matched with the movable contact blade are penetrated and arranged on the upper cover.

Preferably, the upper cover is in a hollow semi-cylindrical shape, and the inner radius of the upper cover is equal to the length of the movable contact blade.

Preferably, the clamping seat is U-shaped, and the width of the central groove of the clamping seat is equal to the thickness of the movable contact blade.

Preferably, the clamping seat is U-shaped, the upper part of the central groove of the clamping seat is in an inverted splayed shape, and the lower width of the central groove of the clamping seat is slightly smaller than the thickness of the movable contact blade.

Preferably, a limit bump is fixedly arranged above the central groove of the clamping seat, and the limit bump is hemispherical.

Preferably, the distance between the limiting protruding block and the bottom of the central groove of the clamping seat is larger than the width of the movable contact blade.

Compared with the prior art, the utility model has at least the following beneficial effects:

in the above scheme;

1. according to the utility model, the upper cover is arranged to be in a hollow semi-cylindrical shape, and the inner radius of the upper cover is equal to the length of the movable contact blade, so that the movable contact blade is always positioned in the upper cover in the process of driving the movable contact blade to rotate along the wire holder through the handle and the ceramic strip, the movable contact blade is prevented from being exposed in the air when the knife switch is closed or opened, an operator cannot contact the movable contact blade, the electric shock prevention effect is achieved, and the safety of the operator is ensured.

2. According to the utility model, the clamping seat and the limiting lug are arranged, the movable contact blade on the knife switch rotates along the wiring seat in the closing process of the knife switch, the movable contact blade is embedded from the upper part of the central groove of the clamping seat, the upper part of the central groove of the clamping seat is in an inverted splayed shape, the clamping seat is convenient to embed, the width below the central groove of the clamping seat is slightly smaller than the thickness of the movable contact blade, the contact between the clamping seat and the movable contact blade is ensured, the conductivity is ensured, and the limiting lug is arranged, because the distance between the limiting lug and the bottom of the central groove of the clamping seat is greater than the width of the movable contact blade, when the movable contact blade is completely embedded into the bottom of the central groove of the clamping seat, the movable contact blade is limited by the limiting lug, the movable contact blade and the clamping seat are prevented from loosening, and the connection of a circuit is ensured.

Drawings

The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the disclosure and to enable a person skilled in the pertinent art to make and use the disclosure.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a partial schematic view of the overall structure of the present utility model;

FIG. 3 is a schematic cross-sectional view of a knife switch according to the present utility model;

FIG. 4 is a schematic cross-sectional view of a knife switch closure structure according to the present utility model;

FIG. 5 is a schematic view of the overall structure of the clamping seat according to the present utility model;

fig. 6 is a schematic cross-sectional view of a clamping seat according to the present utility model.

[ reference numerals ]

1. A base; 2. a wire holder; 3. a movable contact blade; 4. a ceramic strip; 5. a handle; 6. a clamping seat; 601. a limit bump; 7. an upper cover; 701. a through slot.

While particular structures and devices are shown in the drawings to enable a clear implementation of embodiments of the utility model, this is for illustrative purposes only and is not intended to limit the utility model to the particular structures, devices and environments, which may be modified or adapted by those of ordinary skill in the art, as desired, and which remain within the scope of the appended claims.

Detailed Description

The safety knife switch provided by the utility model is described in detail below with reference to the accompanying drawings and specific embodiments. While the utility model has been described herein in terms of the preferred and preferred embodiments, the following embodiments are intended to be more illustrative, and may be implemented in many alternative ways as will occur to those of skill in the art; and the accompanying drawings are only for the purpose of describing the embodiments more specifically and are not intended to limit the utility model specifically.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the relevant art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

Generally, the terminology may be understood, at least in part, from the use of context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending at least in part on the context. In addition, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead, depending at least in part on the context, allow for other factors that are not necessarily explicitly described.

It will be understood that the meanings of "on … …", "over … …" and "over … …" in this disclosure should be interpreted in the broadest sense so that "on … …" means not only "directly on" but also includes meaning "directly on" something with intervening features or layers therebetween, and "over … …" or "over … …" means not only "on" or "over" something, but also may include its meaning "on" or "over" something without intervening features or layers therebetween.

Furthermore, spatially relative terms such as "under …," "under …," "lower," "above …," "upper," and the like may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein may similarly be interpreted accordingly.

Embodiment one:

as shown in fig. 1-4, an embodiment of the present utility model provides a safety knife switch, which comprises a base 1, a wire holder 2, a movable contact blade 3, a ceramic strip 4, a handle 5, a clamping holder 6 and an upper cover 7, wherein the wire holder 2 is mounted in the middle of the upper surface of the base 1, the movable contact blade 3 is rotatably arranged on the wire holder 2, the ceramic strip 4 is fixedly arranged at the top of the movable contact blade 3, the handle 5 is fixedly arranged in the center of the upper surface of the ceramic strip 4, the clamping holder 6 is mounted on the left side of the upper surface of the base 1, and the upper cover 7 is fixedly arranged on the upper surface of the base 1 through bolts.

In this embodiment, the wire holder 2, the movable contact blade 3 and the clamping holder 6 are all provided with 3, and 3 through slots 701 matched with the movable contact blade 3 are provided on the upper cover 7.

In this embodiment, the upper cover 7 is in a hollow semi-cylindrical shape, and the inner radius of the upper cover 7 is equal to the length of the movable contact blade 3, so that the movable contact blade 3 is always located inside the upper cover 7 in the process of rotating the movable contact blade 3 along the wire holder 2, and the effect of preventing electric shock is achieved.

Preferably, the clamping seat 6 is U-shaped, and the width of the central groove of the clamping seat 6 is equal to the thickness of the movable contact blade 3, so that the movable contact blade 3 can be conveniently clamped by the clamping seat 6.

Through being provided with upper cover 7, set up upper cover 7 to be hollow semi-cylindrical shape, and the inside radius of upper cover 7 equals the length of movable contact blade 3 for at the in-process that drives movable contact blade 3 along terminal seat 2 pivoted through handle 5 and ceramic strip 4, movable contact blade 3 is in the inside of upper cover 7 all the time, prevents when closing or opening the knife switch, movable contact blade 3 exposes in the air, and operating personnel can not contact movable contact blade 3, reaches the effect of protection against electric shock, guarantees operating personnel's security.

In this embodiment, the clamping seat 6 is in a U shape, the upper part of the central groove of the clamping seat 6 is in an inverted splayed shape, and the lower width of the central groove of the clamping seat 6 is slightly smaller than the thickness of the movable contact blade 3.

In this embodiment, a limiting bump 601 is fixedly disposed above the central groove of the clamping seat 6, and the limiting bump 601 is hemispherical, so that the movable contact blade can conveniently squeeze the limiting bump 601.

In this embodiment, the distance between the limiting bump 601 and the bottom of the central slot of the clamping seat 6 is greater than the width of the movable contact blade 3.

Through being provided with grip slipper 6 and spacing lug 601, at the switch closure in-process of knife switch, movable contact blade 3 on the switch rotates along terminal seat 2, movable contact blade 3 is embedded from the centre tank top of grip slipper 6, because grip slipper 6 centre tank top is the shape of falling eight, make things convenient for the embedding of grip slipper 6, and grip slipper 6 centre tank below width slightly is less than movable contact blade 3's thickness, guarantee grip slipper 6 and movable contact blade 3's contact, guarantee electric conductivity, and through being provided with spacing lug 601, because spacing lug 601's distance from grip slipper 6 centre tank bottom is greater than movable contact blade 3's width, when movable contact blade 3 imbeds in grip slipper 6 centre tank bottom completely, spacing lug 601 carries out the spacing to movable contact blade 3, prevent that movable contact blade 3 and grip slipper 6 from taking place the loose condition, guarantee the switch-on of circuit.

Those of ordinary skill in the art will appreciate that all or a portion of the steps in implementing the methods of the embodiments described above may be implemented by a program that instructs associated hardware, and the program may be stored on a computer readable storage medium, such as: ROM/RAM, magnetic disks, optical disks, etc.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. A safety knife switch, characterized in that: including base (1), mount pad (2), movable contact blade (3), ceramic strip (4), handle (5), grip slipper (6) and upper cover (7), mount pad (2) are installed to the upper surface mid-mounting of base (1), rotatory being provided with movable contact blade (3) on mount pad (2), the fixed ceramic strip (4) that is provided with in top of movable contact blade (3), the upper surface central authorities of ceramic strip (4) are fixed and are provided with handle (5), grip slipper (6) are installed in the upper surface left side of base (1), the upper surface of base (1) is provided with upper cover (7) through the bolt fastening, mount pad (2), movable contact blade (3) and grip slipper (6) all are provided with 3, and run through on upper cover (7) and be provided with 3 run through groove (701) with movable contact blade (3) assorted, upper cover (7) are the cavity semi-cylindrical shape, and the inside radius of upper cover (7) equals movable contact blade (3) is the length of handle (5), the upper surface of base (1) is the centre gripping groove (6) of the centre gripping groove (601) of the side of being slightly, the centre gripping groove (6) is the centre gripping groove (601) is in the centre of the side of being slightly down, the limiting lug (601) is hemispherical, and the distance between the limiting lug (601) and the bottom of the central groove of the clamping seat (6) is greater than the width of the movable contact blade (3).