Cam switch

Abstract

The utility model relates to a cam switch, and relates to the technical field of control switches, the cam switch comprises a shell and a shell cover installed on the shell, a contact assembly and a control assembly are arranged in the shell, the control assembly comprises a rotating rod rotationally arranged in the shell and a cam piece fixedly arranged on the rotating rod, and the cam piece is fixedly arranged on the rotating rod. One end of the rotating rod is fixedly provided with an extension rod which penetrates through the shell and extends to the outside of the shell, the outer end part of the extension rod is fixedly provided with a connecting block, and the connecting block is fixedly provided with an operating handle; two limiting rods are symmetrically and fixedly arranged on the outer side face of the connecting block, a limiting block is fixedly arranged on the outer side face of the shell, and the limiting rods can abut against the side face of the limiting block when the connecting block rotates. Due to the cooperative arrangement of the limiting rod and the limiting block, when a user controls the operation handle to rotate, excessive rotation of the control handle is avoided, the rotation range of the operation handle is adjusted and limited, corresponding potential safety hazards are reduced, and the safety performance of the cam switch used in some scenes is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of controlling switches, and in particular to a cam switch. BACKGROUND

[0002] As a key electromechanical switch device in electrical control systems, the importance of the cam switch in the electrical cabinet is self-evident. Through the precise design of the cam rotating mechanism, the switch can accurately control the on-off of the circuit, ensuring the stable operation of the electrical system. Its simple structure, strong durability and high reliability make the cam switch widely used in many industrial and civil fields.

[0003] In the prior art, a typical cam switch design includes a shell, an embedded insulating support, a movable terminal post, a static terminal post, and a shell cover. The movable contact piece is flexibly hinged to the movable terminal post, while the static contact piece is stably installed on the static terminal post, and the contact pressure between the two is maintained by the compression spring on the insulating support. More importantly, a rotatable cam is provided in the shell, which is connected to the control handle through a rotating shaft. The rotation of the handle will drive the cam to rotate, and the protrusions and depressions on the outer periphery of the cam will cleverly act on the movable contact piece to achieve the on-off control of the circuit.

[0004] However, while pursuing the convenience of operation, one problem that cannot be ignored is the control of the rotation angle of the cam. In some safety-sensitive application scenarios, it is crucial to accurately limit the rotation range of the cam to prevent abnormal circuit or safety hazards caused by excessive rotation. Although the current design is complete in function, it still has deficiencies in preventing user misoperation and ensuring that the cam only rotates within the preset angle. When using the above-mentioned cam switch, the user may easily over-rotate the control handle, which poses a safety hazard. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide a cam switch that solves the problem of excessive rotation of the cam during rotation and safety hazards in some application scenarios in the related art.

[0006] The cam switch provided by the present application adopts the following technical solution:

[0007] A cam switch includes a shell and a shell cover mounted on the shell. A contact assembly and a control assembly are provided in the shell. The control assembly includes a rotating rod rotatably arranged in the shell and a cam member fixed to the rotating rod. One end of the rotating rod is fixed with an extension rod that penetrates through the shell and extends to the outside of the shell. An outer end of the extension rod is fixed with a connecting block, and an operating handle is fixed to the connecting block. Two limiting rods are symmetrically fixed to the outer side of the connecting block, and a limiting block is fixed to the outer side of the shell. The limiting rods can abut against the side surface of the limiting block when the connecting block rotates.

[0008] By adopting the technical scheme, when the cam switch is used, the external circuit is connected with the static terminal post and the dynamic terminal post respectively, and then the control handle is rotated to drive the connecting block, the extension rod, the rotating rod and the cam to rotate, thereby controlling the contact assembly; in addition, when the user rotates the control handle, the rotation range of the control handle is reduced due to the cooperation of the limiting rod and the limiting block, so as to avoid excessive rotation of the control handle, adjust and limit the rotation range of the control handle, reduce the corresponding safety hazard, and improve the safety performance of the cam switch in some scenarios.

[0009] Optionally, the end of the operation handle towards the connecting block is fixedly provided with a fixed screw rod, and a fixed threaded groove for the fixed screw rod to screw into is formed on the connecting block.

[0010] By adopting the technical scheme, during the installation of the operation handle, the fixed screw rod on the fixed screw rod is screwed into the fixed threaded groove on the connecting block, so that the installation and fixation of the operation handle can be realized, and the installation efficiency of the operation handle is improved.

[0011] Optionally, the outside of the shell is provided with a holding ball, the outer periphery of the end of the operation handle away from the connecting block is provided with an external thread, and a first threaded groove for the end of the operation handle to screw into is formed on the holding ball.

[0012] By adopting the technical scheme, when the cam switch is used, the staff can hold the holding ball with the palm to drive the operation handle to rotate, improve the control feeling when the operation handle rotates, and enhance the use performance of the cam switch in application; and since the first threaded groove is formed, the installation and fixation of the holding ball are facilitated.

[0013] Optionally, a locking gap is formed on the connecting block, a limiting gap is formed on the outer periphery of the extension rod, the outside of the shell is provided with a locking bolt which penetrates through the locking gap and the limiting gap and extends to the outside of the connecting block, and a locking nut is threadedly sleeved on the outer end of the locking bolt.

[0014] By adopting the technical scheme, during the installation of the extension rod and the connecting block, the locking bolt penetrates through the locking gap and the limiting gap and extends to the outside of the connecting block, and then the outer end of the locking bolt is fastened by using the locking nut, so that the connecting block can be quickly assembled.

[0015] Optionally, the side surface of the limiting rod towards the limiting block is an inwardly recessed arc surface.

[0016] By adopting the technical scheme, when the limiting rod contacts the limiting block, the arc surface design can provide a certain buffer space to reduce the impact force caused by direct impact.

[0017] Optionally, the first limiting groove and the second limiting groove are symmetrically arranged on the inner walls of the opposite sides of the shell, the first supporting sleeve is fixedly arranged in the first limiting groove and sleeved on the outer periphery of the extension rod, and the second supporting sleeve is fixedly arranged in the second limiting groove and sleeved on the outer periphery of the supporting rod.

[0018] By adopting the above technical scheme, when the first supporting sleeve and the second supporting sleeve are installed, the first supporting sleeve and the second supporting sleeve are used to support the rotating rod, thereby improving the stability of the rotating rod during rotation.

[0019] Optionally, the elastic pad is fixedly arranged on the side of the limiting rod facing the limiting block.

[0020] By adopting the above technical scheme, the elastic pad provides a certain degree of buffering effect when the limiting rod abuts against the limiting block, thereby reducing the possibility of damage of the limiting rod when the limiting rod abuts against the limiting block, and prolonging the service life of the cam switch.

[0021] Optionally, the shell is externally provided with an adjusting block, the dovetail plug block is fixedly arranged on the adjusting block, the side of the limiting block facing the connecting block is provided with a dovetail sliding groove, the elastic clamping piece is arranged on the dovetail plug block, and the positioning groove for the elastic clamping piece to be inserted is arranged on the inner wall of the dovetail sliding groove.

[0022] By adopting the above technical scheme, when the adjusting block is installed, the dovetail block on the adjusting block is inserted into the dovetail sliding groove on the limiting block, and then the elastic clamping piece is clamped into the positioning groove at the bottom side of the dovetail sliding groove, so as to realize the installation and fixation of the adjusting block. In this way, the rotation range of the operating handle can be further adjusted according to actual conditions, and the safety performance of the cam switch in application can be ensured.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. Due to the cooperation of the limiting rod and the limiting block, the rotation range of the operating handle is reduced when the user controls the rotation of the operating handle, thereby avoiding excessive rotation of the control handle, adjusting and limiting the rotation range of the operating handle, reducing the corresponding safety hazards, and improving the safety performance of the cam switch in some scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a schematic view of the overall structure of embodiment 1 of the present application;

[0027] Figure 2 is a schematic view of the sectional structure of embodiment 1 of the present application embodying the mounting cooperation of the contact assembly;

[0028] Figure 3 is a schematic view of the sectional structure of embodiment 1 of the present application embodying the mounting cooperation of the control assembly;

[0029] Figure 4 is a schematic view of the partial structure of embodiment 1 of the present application embodying the mounting cooperation of the engaging block and the operating handle;

[0030] Figure 5 is a schematic view of the sectional structure of embodiment 1 of the present application embodying the mounting cooperation of the operating handle;

[0031] Figure 6 is a schematic view of the partial sectional structure of embodiment 1 of the present application embodying the mounting cooperation of the engaging block;

[0032] Figure 7 is a schematic view of the sectional structure of embodiment 2 of the present application;

[0033] Figure 8 is a schematic view of Figure 7 part A.

[0034] In the figure, 1, housing; 11, first limiting sink groove; 12, second limiting sink groove; 13, first support sleeve; 14, second support sleeve; 15, limiting block; 151, dovetail sliding groove; 152, positioning groove; 16, wiring port; 2, housing cover; 3, contact assembly; 31, insulating support; 32, static wiring post; 33, static contact; 34, dynamic wiring post; 35, dynamic contact; 36, compression spring; 4, control assembly; 41, cam piece; 42, rotating rod; 421, extension rod; 4211, limiting notch; 422, support rod; 43, engaging block; 431, limiting rod; 432, locking notch; 433, fixed threaded groove; 44, operating handle; 441, fixed screw rod; 45, holding ball; 451, first threaded groove; 46, elastic pad; 5, locking bolt; 6, locking nut; 7, adjusting block; 71, dovetail insertion block; 711, placement groove; 8, elastic clamping piece; 81, spring; 82, arc-shaped protrusion. DETAILED DESCRIPTION

[0035] The present application is further described in detail below with reference to all the accompanying drawings. EMBODIMENT

[0036] Reference is made to Figure 1 , Figure 2 and Figure 3A cam switch, a shell 1 and a shell cover 2, the shell cover 2 is fixed on the shell 1 by screws, the shell 1 is provided with a contact assembly 3 and a control assembly 4, wherein the contact assembly 3 comprises an insulating support 31 fixed in the shell 1, a static terminal post 32 fixed on the insulating support 31, a dynamic terminal post 34 fixed on the insulating support 31, a dynamic contact piece 35 hinged on the dynamic terminal post 34, the dynamic contact piece 35 is fixed on the static terminal post 32, a compression spring 36 is fixed on the insulating support 31 for pressing the dynamic contact piece 35;

[0037] The control assembly 4 comprises a rotating rod 42 rotatably arranged in the shell 1 and a plurality of cam members 41 fixed on the outer periphery of the rotating rod 42, one end of the rotating rod 42 is integrally formed with an extension rod 421 penetrating through the shell 1 and extending to the outside of the shell 1, the outer end of the extension rod 421 is fixed with a connecting block 43, the connecting block 43 is fixed with an operating handle 44; the bottom side of the shell 1 is provided with two wire connection ports 16 for connecting external cables;

[0038] In use of the cam switch, the external lines are connected with the static terminal post 32 and the dynamic terminal post 34 respectively, and then the control operating handle 44 is rotated to drive the connecting block 43, the extension rod 421, the rotating rod 42 and the cam members 41 to rotate; when the cam members 41 rotate, the protrusions and recesses on the outer periphery of the cam members 41 will press the dynamic contact piece 35 and the compression spring 36 to different degrees, thereby controlling the on-off of the dynamic contact piece 35 and the static contact piece 33.

[0039] Referring to Figure 3 The first limiting groove 11 and the second limiting groove 12 are symmetrically arranged on the inner walls of the opposite sides of the shell 1, wherein the first limiting groove 11 is internally fixed with a first supporting sleeve 13 sleeved on the outer periphery of the extension rod 421; the end of the rotating rod 42 away from the connecting block 43 is coaxially fixed with a supporting rod 422, and the second limiting groove 12 is internally fixed with a second supporting sleeve 14 sleeved on the outer periphery of the supporting rod 422; the rotating rod 42 is supported by the first supporting sleeve 13 and the second supporting sleeve 14 to improve the stability of the rotating rod 42 during rotation.

[0040] Referring to Figure 4 Two limiting rods 431 are symmetrically fixed on the outer side of the connecting block 43, wherein the limiting rods 431 are integrally injection molded with the connecting block 43, and the outer side of the shell 1 is integrally formed with a limiting block 15, the limiting rods 431 can abut against the side surface of the limiting block 15 when the connecting block 43 rotates, and the side surface of the limiting block 15 facing the limiting rods 431 is an inwardly concave arc surface, thereby limiting the rotation range of the operating handle 44.

[0041] Referring to Figure 5The end of the operation handle 44 is integrally formed with a fixing screw rod 441, and the adapter block 43 is provided with a fixing screw groove 433 for the fixing screw rod 441 to be screwed into. The outer part of the shell 1 is provided with a holding ball 45, and the outer periphery of the end of the operation handle 44 away from the adapter block 43 is provided with an external thread. The holding ball 45 is provided with a first screw groove 451 for the end of the operation handle 44 to be screwed into. In this way, the installation and fixing of the operation handle 44 are facilitated, the control feeling when the operation handle 44 rotates is improved, and the use performance of the cam switch is enhanced.

[0042] With reference to Figure 6 The adapter block 43 is provided with a locking gap 432, and the outer periphery of the extension rod 421 is provided with a limiting gap 4211. The outer part of the shell 1 is provided with a locking bolt 5 which penetrates through the locking gap 432 and the limiting gap 4211 and extends to the outside of the adapter block 43. The outer end of the locking bolt 5 is threadedly provided with a locking nut 6. The screw rod part of the locking bolt 5 is attached to the inner wall of the limiting gap 4211. In this way, the installation and fixing of the adapter block 43 and the extension rod 421 are achieved.

[0043] The implementation principle of the embodiment is as follows:

[0044] When the user controls the operation handle 44 to rotate, the limiting rod 431 and the limiting block 15 are matched to reduce the rotation range of the operation handle 44, and the rotation range of the operation handle 44 is adjusted and limited. When the cam piece 41 rotates, the protrusions and recesses on the outer periphery of the cam piece 41 will extrude the movable contact piece 35 and the compression spring 36 to different degrees, thereby controlling the on-off of the movable contact piece 35 and the static contact piece 33. Embodiment

[0045] With reference to Figure 7 The difference between the embodiment and the embodiment 1 is that the limiting rod 431 is fixed with an elastic pad 46 made of rubber on the side surface facing the limiting block 15 by means of glue. In this way, a certain degree of buffering effect is provided, the possibility of damage of the limiting rod 431 when abutting against the limiting block 15 is reduced, and the service life of the cam switch is prolonged.

[0046] With reference to Figure 7 and Figure 8The outer part of the shell 1 is provided with an adjusting block 7, one side of the adjusting block 7 is integrally formed with a dovetail plug block 71, the side surface of the limiting block 15 towards the joint block 43 is provided with a dovetail sliding groove 151, the dovetail plug block 71 is provided with an elastic clamping piece 8, wherein the elastic clamping piece 8 comprises a spring 81 and an arc-shaped protruding block 82, the dovetail plug block 71 is provided with a placing groove 711 for placing the spring 81 and the arc-shaped protruding block 82, the spring 81 extrudes the arc-shaped protruding block 82, so that a part of the arc-shaped protruding block 82 is extruded out of the opening of the placing groove 711, the outer side surface of the extruded part of the arc-shaped protruding block 82 is an arc surface, the corresponding arc length of the arc surface is a minor arc, and the inner wall of the dovetail sliding groove 151 is provided with a positioning groove 152 for inserting the extruded part of the arc-shaped protruding block 82;

[0047] When the adjusting block 7 is installed, the dovetail plug block on the adjusting block 7 is inserted into the dovetail sliding groove 151 on the limiting block 15, and then the extruded part of the arc-shaped protruding block 82 is clamped into the positioning groove 152 on the bottom side of the dovetail sliding groove 151, thereby achieving the installation and fixation of the adjusting block 7, so that the rotation range of the operating handle 44 can be further adjusted according to the actual situation, and the safety performance of the cam switch in application is ensured.

[0048] Unless otherwise defined, the terms or scientific terms used in the present application shall have the usual meaning understood by a person with ordinary skill in the art to which the present application belongs. The terms "first", "second", "third" and the like used in the present application do not represent any order, number or importance, but are only used to distinguish different components. The terms "one" or "a" and the like do not represent a quantity limitation, but represent the existence of at least one. The terms "include" or "contain" and the like mean that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalents, and do not exclude other elements or objects. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0049] The embodiments of the present specific embodiment are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are denoted by the same reference numerals. Therefore, any equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A cam switch, comprising a housing (1) and a housing cover (2) mounted on the housing (1), wherein a contact assembly (3) and a control assembly (4) are provided in the housing (1), wherein the control assembly (4) comprises a rotating rod (42) rotatably arranged inside the housing (1) and a cam member (41) fixed to the rotating rod (42), wherein one end of the rotating rod (42) is fixedly provided with an extension rod (421) penetrating the housing (1) and extending to the outside of the housing (1), an outer end of the extension rod (421) is fixedly provided with a connecting block (43), and an operating handle (44) is fixedly provided on the connecting block (43); It is characterized by: Two limiting rods (431) are symmetrically fixed on the outer surface of the connecting block (43), and a limiting block (15) is fixed on the outer surface of the shell (1). The limiting rods (431) can abut against the side of the limiting block (15) when the connecting block (43) rotates.

2. A cam switch according to claim 1, characterized in that: A fixing screw (441) is fixedly provided on the end of the operating handle (44) facing the connecting block (43), and a fixing thread groove (433) for the fixing screw (441) to be screwed into is provided on the connecting block (43).

3. The cam switch according to claim 1, characterized in that: A gripping ball (45) is provided on the outside of the housing (1); an outer peripheral surface of the end of the operating handle (44) away from the connecting block (43) is provided with an external thread; and a first thread groove (451) is provided on the gripping ball (45) for the end of the operating handle (44) to be screwed into.

4. The cam switch according to claim 1, characterized in that: The connecting block (43) is provided with a locking notch (432), the outer periphery of the extension rod (421) is provided with a limiting notch (4211), the outside of the housing (1) is provided with a locking bolt (5) that penetrates both the locking notch (432) and the limiting notch (4211) and extends to the outside of the connecting block (43), and the outer end of the locking bolt (5) is threadedly sleeved with a locking nut (6).

5. The cam switch according to claim 1, characterized in that: The side surface of the limiting rod (431) facing the limiting block (15) is an inwardly concave arc surface.

6. The cam switch according to claim 1, characterized in that: A first limiting groove (11) and a second limiting groove (12) are symmetrically provided on the inner walls of the two opposite sides of the housing (1); a first supporting sleeve (13) sleeved on the outer periphery of the extension rod (421) is fixedly provided inside the first limiting groove (11); A support rod (422) is coaxially fixed on the end of the rotating rod (42) away from the connecting block (43), and a second support sleeve (14) sleeved on the outer periphery of the support rod (422) is fixed inside the second limiting groove (12).

7. The cam switch according to claim 1, characterized in that: An elastic pad (46) is fixedly provided on the side of the limiting rod (431) facing the limiting block (15).

8. The cam switch according to claim 1, characterized in that: An adjusting block (7) is provided on the outside of the housing (1), a dovetail plug block (71) is fixed on the adjusting block (7), a dovetail chute (151) is provided on the side of the limit block (15) facing the connecting block (43), an elastic clamping piece (8) is provided on the dovetail plug block (71), and a positioning groove (152) for inserting the elastic clamping piece (8) is provided on the inner wall of the dovetail chute (151).

Images