Limit switch

Abstract

The utility model relates to a limit switch, which comprises a box cover, a box body and a display module, the box cover is fixedly connected with the box body, a switch component is arranged in a cavity formed by the box cover and the box body, the display module is connected with a rotating shaft assembly, and the rotating shaft assembly is used for switching OPEN characters and CLOSE characters. The rotating shaft assembly comprises a rotating shaft, a roller arranged on the rotating shaft and an eccentric wheel eccentrically arranged with the rotating shaft, the rotating shaft and the roller are concentrically arranged and synchronously rotate along with the rotating shaft, and the eccentric wheel is driven by the roller to rotate and is matched with the microswitch for use. According to the utility model, the microswitch is triggered by adopting the rotating shaft, the roller and the eccentric wheel, and the eccentric wheel can adopt structures with different sizes and shapes so as to be matched with the microswitch for use, that is, the cooperation between the microswitch and the eccentric wheel is more flexible; and due to the design of the eccentric wheel, the action stability of the microswitch can be improved, and the situation of false triggering or missed triggering can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a limit switch. Background Art

[0002] Limit switches, also known as travel switches, can be installed on relatively static objects (such as fixed frames, door frames, etc., referred to as static objects) or moving objects (such as vehicles, doors, etc., referred to as animals). When an animal approaches a static object, the switch connecting rod drives the switch contacts to cause the closed contacts to break or the open contacts to close, and the change in the open and closed states of the switch contacts controls the circuit and the motor.

[0003] Existing limit switches generally use concentric rotating shafts and rollers to close or open the micro switch. However, in actual use, the roller may fail to trigger the micro switch, and the dimensional accuracy between the two must be maintained within a certain range. Summary of the invention

[0004] The purpose of the utility model is to provide a limit switch to solve the above technical problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A limit switch, characterized in that it includes a box cover, a box body and a display module, the box cover is fixedly connected to the box body, a switch component is arranged in a cavity formed by the box cover and the box body, the switch component includes a support plate, a terminal group, and a micro switch, the terminal group and the micro switch are arranged on the support plate, the display module is arranged on one side of the box cover, the display module has a plurality of display surfaces, and the words OPEN and CLOSE are arranged on the display surface to indicate the state of the limit switch, the display module is connected to a rotating shaft assembly, the rotating shaft assembly is used to switch the words OPEN and CLOSE, the rotating shaft assembly includes a rotating shaft, a roller arranged on the rotating shaft, and an eccentric wheel eccentrically arranged with the rotating shaft, the rotating shaft and the roller are arranged concentrically and rotate synchronously with the rotating shaft, the eccentric wheel rotates under the drive of the roller and is adapted for use with the micro switch.

[0007] The utility model is further configured that two micro switches are provided, which are arranged along the length direction of the rotating shaft and correspond to the two eccentric wheels.

[0008] The utility model is further configured that a protective shell is arranged outside the display module, the protective shell is made of a transparent material, and a sealing ring is arranged between the protective shell and the box cover.

[0009] The utility model is further provided that a second sealing ring is provided between the box cover and the box body.

[0010] The utility model is further arranged that a cable connection hole is arranged on the box body, and a dustproof hole plug is arranged at the cable connection port.

[0011] The beneficial effects of the utility model: the utility model triggers the micro switch by adopting a rotating shaft, a roller and an eccentric wheel. The eccentric wheel can adopt structures of different sizes and shapes to cooperate with the use of the micro switch, that is, the cooperation between the micro switch and the eccentric wheel is more flexible; secondly, the design of the eccentric wheel can improve the action stability of the micro switch and reduce the situation of false triggering or missed triggering. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0013] Figure 1 It is a side view of an embodiment of the utility model.

[0014] Figure 2 It is a half-section view of an embodiment of the utility model.

[0015] Figure 3 It is a partial cross-sectional view of an embodiment of the utility model.

[0016] Figure 4 It is a schematic structural diagram of the rotating shaft assembly in an embodiment of the utility model.

[0017] Reference numerals:

[0018] 10. Box cover; 20. Box body; 30. Display module; 40. Switch component; 401. Support plate; 402. Terminal block; 403. Micro switch; 50. Shaft assembly; 501. Shaft; 502. Roller; 503. Eccentric wheel; 60. Protective housing; 70. Sealing ring 1; 80. Sealing ring 2; 90. Cable connection hole; 100. Dustproof hole plug; DETAILED DESCRIPTION

[0019] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0020] like Figure 1 -like Figure 4As shown, the utility model is a limit switch, including a box cover 10, a box body 20 and a display module 30, wherein the box cover 10 is fixedly connected to the box body 20, a switch component 40 is arranged in the cavity formed by the box cover 10 and the box body 20, and the switch component 40 includes a support plate 401, a terminal group 402, and a micro switch 403, wherein the terminal group 402 and the micro switch 403 are arranged on the support plate 401, and the display module 30 is arranged on one side of the box cover 10, and the display module 30 has a plurality of display surfaces, and a display surface is arranged There are words OPEN and CLOSE for indicating the state of the limit switch. The display module 30 is connected to a shaft assembly 50, and the shaft assembly 50 is used to switch the words OPEN and CLOSE. The shaft assembly 50 includes a shaft 501, a roller 502 arranged on the shaft 501, and an eccentric wheel 503 eccentrically arranged with the shaft 501. The shaft 501 is concentrically arranged with the roller 502 and rotates synchronously with the shaft 501. The eccentric wheel 503 rotates under the drive of the roller 502 and is adapted for use with the micro switch 403.

[0021] Two micro switches 403 are provided, which are arranged along the length direction of the rotating shaft 501 and correspond to the two eccentric wheels 503. A protective shell 60 is provided outside the display module 30. The protective shell 60 is made of transparent material, and a sealing ring 1 70 is provided between the protective shell 60 and the box cover 10. A sealing ring 2 80 is provided between the box cover 10 and the box body 20.

[0022] The box body 20 is provided with a cable connection hole 90 , and a dustproof hole plug 100 is provided at the cable connection port.

[0023] The utility model triggers the micro switch 403 by adopting the rotating shaft 501, the roller 502 and the eccentric wheel 503. The eccentric wheel 503 can adopt structures of different sizes and shapes to cooperate with the use of the micro switch 403, that is, the cooperation between the micro switch 403 and the eccentric wheel 503 is more flexible; secondly, the design of the eccentric wheel 503 can improve the action stability of the micro switch 403 and reduce the situation of false triggering or missed triggering.

[0024] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0025] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0026] The above description shows and describes several preferred embodiments of the utility model, but as before, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention and creation of this article through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A limit switch, characterized in that: It includes a box cover, a box body and a display module, the box cover is fixedly connected to the box body, a switch component is arranged in the cavity formed by the box cover and the box body, the switch component includes a support plate, a terminal group, and a micro switch, the terminal group and the micro switch are arranged on the support plate, the display module is arranged on one side of the box cover, the display module has multiple display surfaces, and the words OPEN and CLOSE are arranged on the display surface to indicate the state of the limit switch, the display module is connected to a rotating shaft assembly, the rotating shaft assembly is used to switch the words OPEN and CLOSE, the rotating shaft assembly includes a rotating shaft, a roller arranged on the rotating shaft, and an eccentric wheel eccentrically arranged with the rotating shaft, the rotating shaft and the roller are arranged concentrically and rotate synchronously with the rotating shaft, the eccentric wheel rotates under the drive of the roller and is adapted for use with the micro switch.

2. A limit switch according to claim 1, characterized in that: The micro switches are provided with two, which are arranged along the length direction of the rotating shaft and correspond to the two eccentric wheels.

3. A limit switch according to claim 1, characterized in that: A protective shell is arranged outside the display module, and the protective shell is made of transparent material. A sealing ring 1 is arranged between the protective shell and the box cover.

4. A limit switch according to claim 1, characterized in that: A second sealing ring is arranged between the box cover and the box body.

5. A limit switch according to claim 1, characterized in that: The box body is provided with a cable connection hole, and a dustproof hole plug is provided at the cable connection hole.

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