Knife switch

Abstract

The utility model discloses a knife switch, and belongs to the field of electrical switches. The device comprises a bottom plate, a shell cover, a blade and a contact seat, the contact seat comprises an upper contact seat and a lower contact seat which are arranged at an interval, the blade is hinged to the lower contact seat, and the blade and the upper contact seat are in openable connection; the upper end of the blade extends out of the shell cover and is fixed with an operating handle; the upper contact seat comprises two clamping arms which are oppositely arranged, a clamping opening for inserting a blade is formed between the two clamping arms, a necking U-shaped clamping spring is arranged on the upper contact seat, the U-shaped clamping spring is of a sheet-shaped structure, and clamping grooves are formed in the opposite positions of the opposite sides of the two clamping arms; limiting bayonets with openings are formed in the side edges of the two clamping arms, the U-shaped clamping spring is clamped into the limiting bayonets, and the two end feet of the U-shaped clamping spring are connected to the clamping grooves of the two clamping arms in a clamped mode respectively; according to the utility model, the structure of the knife switch is optimized, so that the U-shaped clamp spring is convenient to install, the production efficiency can be improved, and the use performance of the knife switch can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of electrical switch, concretely relates to a knife switch. BACKGROUND

[0002] The knife switch is a kind of manually operated electrical switch, mainly used for the operation of switching on and off power in low-voltage circuit, and is widely used in low-voltage distribution system of family, factory, substation and other places, for controlling the start and stop of lighting, motor and other electrical equipment. In order to improve the clamping force of the contact seat on the blade and improve the electrical conduction performance, some existing knife switches are usually provided with a through hole on the contact seat, and an open ring-shaped clamping spring is configured, which is limited on the contact seat by being inserted through the through hole, and the two ends of the clamping spring are respectively abutted with the outer sides of the two clamping arms of the contact seat. The problem of this kind of knife switch structure is that, since the breaking size of the clamping spring is small, the operation of inserting the clamping spring through the through hole is relatively cumbersome, and the installation difficulty is relatively large, which is not conducive to improving the production efficiency. SUMMARY

[0003] To solve the problem of inconvenient installation of the clamping spring on the contact seat in the existing knife switch, the utility model provides a kind of knife switch.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] The utility model provides a kind of knife switch, including bottom plate, shell cover, blade and contact seat;The contact seat includes the upper contact seat and the lower contact seat of interval arrangement, the blade is hinged with the lower contact seat, and the blade is connected with the upper contact seat and can be opened and closed;The upper end of the blade extends from the shell cover and is fixed with operating handle;The upper contact seat includes two clamping arms arranged oppositely, and the clamping arms form a clamping opening for inserting the blade, and the upper contact seat is provided with a U-shaped clamping spring with a neck, the U-shaped clamping spring is a sheet structure, and the opposite positions of the two clamping arms on the opposite sides are provided with clamping grooves;The side edge of the two clamping arms is provided with a limiting clamping opening with an opening, the U-shaped clamping spring is clamped into the limiting clamping opening, and the two end feet of the U-shaped clamping spring are clamped into the clamping grooves of the two clamping arms respectively.

[0006] Preferably, a stop block is formed by stamping into the clamping opening on the clamping arm, and when the blade is clamped into place with the upper contact seat, the blade is abutted on the stop block, and in this state, the distance between the blade and the bottom plate gradually increases in the direction from bottom to top, so that the blade is inclined relative to the bottom plate.

[0007] Preferably, the bottom plate is provided with a positioning slot corresponding to each of the contact bases, the contact bases are embedded in the positioning slots, screw holes one and two are provided in the positioning slots, the contact bases are provided with screw holes three and four corresponding to the screw holes one and two, a fastening screw is connected through the screw holes one and three, and a wiring screw is connected with a wiring nut after passing through the screw holes two and four.

[0008] Preferably, the bottom plate is provided with an embedded slot surrounding each of the screw holes one.

[0009] The utility model has the positive effect that: the utility model optimizes the structure of the tool switch, when installing the U-shaped clamp spring, the U-shaped clamp spring is clamped into the limiting clamp opening, and the end foot of the U-shaped clamp spring is matched with the clamping groove to reliably position the U-shaped clamp spring, so that the U-shaped clamp spring is convenient to install, which helps to improve the production efficiency and ensures the use performance of the tool switch. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following briefly introduces the drawings needed to be used in the specific embodiment or the prior art description. In the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0011] Figure 1 It is a structural schematic view of the tool switch in the utility model;

[0012] Figure 2 It is a structural schematic view of the tool switch in the utility model; Figure 1 It is a structural schematic view of the tool switch in the utility model;

[0013] Figure 3 It is an exploded view of the tool switch in the utility model;

[0014] Figure 4 It is a structural schematic view of the upper contact base in the utility model;

[0015] Figure 5 It is a structural schematic view of the bottom plate in the utility model;

[0016] Figure 6 It is a front view of the U-shaped clamp spring in the utility model.

[0017] The reference numerals shown in the drawings are: 1-bottom plate; 10-positioning slot; 11-screw hole one; 12-screw hole two; 13-embedded slot; 2-shell cover; 3-blade; 4-upper contact base; 41-clamping arm; 42-limiting clamp opening; 43-clamping groove; 44-stop block; 5-lower contact base; 6-U-shaped clamp spring; 7-wiring screw; 71-wiring nut; 8-screw hole three; 9-screw hole four. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model will be described below in detail with reference to the drawings. The following examples are only used to make the technical scheme of the utility model clearer, and therefore only serve as examples, and cannot limit the protection scope of the utility model.

[0019] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the technical personnel in the field to which the utility model belongs.

[0020] The knife switch structure of the utility model embodiment is shown in Figures 1 to 5 The knife switch structure of the utility model embodiment is shown in

[0021] The upper contact seat 4 comprises two clamping arms 41 oppositely arranged, and a clamping opening for inserting the knife blade 3 is formed between the two clamping arms 41. A U-shaped clamping spring 6 in the shape of a neck is mounted on the upper contact seat 4. The opening width of the U-shaped clamping spring 6 is gradually narrowed (i.e. in the shape of a neck, as shown in Figure 6 The two clamping arms 41 are provided with clamping grooves 43 at opposite positions on the side opposite to each other. The side edges of the two clamping arms 41 are provided with limiting clamping openings 42 with openings. The U-shaped clamping spring 6 is clamped into the limiting clamping opening 42. The two end feet of the U-shaped clamping spring 6 are clamped into the clamping grooves 43 of the two clamping arms 41. By using the above structure, the two clamping arms 41 are provided with clamping force by the U-shaped clamping spring 6, so as to ensure that the upper contact seat 4 can be reliably connected with the knife blade 3, thereby ensuring the electrical connection performance. When the U-shaped clamping spring 6 is installed, the U-shaped clamping spring 6 is clamped into the limiting clamping opening 42 with the opening, and the end feet of the U-shaped clamping spring 6 are matched with the clamping grooves 43, so as to reliably position the U-shaped clamping spring 6. The U-shaped clamping spring 6 is installed conveniently, which helps to improve the production efficiency and ensure the use performance of the knife switch.

[0022] Further, in combination with Figure 2 and Figure 4As shown, the upper clamping arm 41 is punched to form a stop block 44 in the clamping opening, when the blade 3 is clamped in place by the upper contact seat 4, the blade 3 abuts on the stop block 44 to stop and limit the blade 3, and in this state, the distance between the blade 3 and the bottom plate 1 gradually increases in the upward direction, so that the blade 3 is inclined relative to the bottom plate 1, so that the handle and the bottom plate 1 can maintain a larger distance in the closed state of the blade switch, thereby improving the convenience and safety of the handle for operation.

[0023] In order to facilitate the installation of the contact seat on the bottom plate 1, in combination with Figure 2 and Figure 3 As shown, the bottom plate 1 is provided with a positioning groove 10 corresponding to the position of each contact seat, the contact seat is embedded in the positioning groove 10 to position the contact seat, and screw hole one 11 and screw hole two 12 are provided in the positioning groove 10, the contact seat is provided with screw hole three 8 corresponding to screw hole one 11 and screw hole four 9 corresponding to screw hole two 12, a fastening screw (not shown in the figure) is fastened and connected through screw hole one 11 and screw hole three 8 to fix the contact seat on the bottom plate 1, and an internal thread can be provided on the inner wall of the screw hole three 8, the fastening screw is screwed and fixed through the screw hole one 11 and the screw hole three 8, and the terminal screw 7 is connected with the terminal nut 71 through the screw hole two 12 and the screw hole four 9, when the contact seat is connected with the external lead wire, the terminal nut 71 is tightened to press the end of the external lead wire on the contact seat to realize the connection, and the terminal screw and the terminal nut 71 can enhance the fixing effect of the contact seat on the bottom plate 1.

[0024] Further, as shown in Figure 5 In order to provide an embedded groove 13 around each screw hole one 11 on the bottom surface of the bottom plate 1, so that the embedded groove 13 can accommodate the end of the fastening screw / terminal screw 7, avoiding the complete exposure of the end of the fastening screw and the terminal screw 7, thereby enhancing the protection performance.

[0025] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not a limitation on the embodiments of the present application. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. The changes or variations which belong to the substantial spirit of the present application and are extended are still within the protection scope of the present application.

Claims

1. A knife switch, comprising a base plate (1), a housing cover (2), a blade (3) and a contact seat; the contact seat comprises an upper contact seat (4) and a lower contact seat (5) arranged at intervals, the blade (3) and the lower contact seat (5) are hinged, and the blade (3) and the upper contact seat (4) are openably connected; the upper end of the blade (3) extends out of the housing cover (2) and is fixed with an operating handle; characterized in that, The upper contact seat (4) comprises two clamping arms (41) arranged opposite to each other, a clamping opening for inserting the blade (3) is formed between the two clamping arms (41), a U-shaped clamping spring (6) with a constricted opening is installed on the upper contact seat (4), the U-shaped clamping spring (6) is a sheet-like structure, and a clamping groove (43) is provided at a relative position on the opposite sides of the two clamping arms (41); the side edges of the two clamping arms (41) are provided with a limit clamping opening (42) with an opening, the U-shaped clamping spring (6) is clamped into the limit clamping opening (42), and the two end legs of the U-shaped clamping spring (6) are respectively clamped in the clamping grooves (43) of the two clamping arms (41).

2. The knife switch according to claim 1, characterized in that: A stop block (44) is formed by punching the clamping arm (41) into the clamping opening. When the blade (3) is engaged with the upper contact seat (4), the blade (3) abuts against the stop block (44). In this state, the distance between the blade (3) and the bottom plate (1) gradually increases from bottom to top, so that the blade (3) is tilted relative to the bottom plate (1).

3. The knife switch according to claim 1, characterized in that: Positioning grooves (10) are provided on the base plate (1) at positions corresponding to the contact seats. The bottom of the contact seat is embedded in the positioning groove (10). A screw hole (11) and a screw hole (12) are provided through the positioning groove (10). A screw hole (8) corresponding to the screw hole (11) and a screw hole (9) corresponding to the screw hole (12) are provided on the contact seat. A fastening screw passes through the screw hole (11) and is fastened to the screw hole (8). A wiring screw (7) passes through the screw hole (12) and the screw hole (9) and is connected to a wiring nut (71).

4. The knife switch according to claim 3, characterized in that: The bottom surface of the base plate (1) is provided with an embedding groove (13) surrounding each screw hole (11) and each screw hole (12).

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