Automatic reset travel switch

Abstract

The invention relates to the technical field of travel switches, and more specifically discloses an automatic reset travel switch, which comprises a circuit trigger box, the back surface of the circuit trigger box is fixedly connected with a rotating arm assembly, the circuit trigger box comprises a circuit shell, and the front surface of the circuit shell is fixedly connected with a wiring groove. A guide cylinder is fixedly connected to the back surface of the inner side of the circuit shell, sliding grooves are formed in the two sides of the circuit shell, conductive blocks are installed on the two sides of the circuit shell, and a first trigger assembly is fixedly connected to the position, close to the front surface, of the inner side of the circuit shell; when the rotating arm assembly rotates and pulls the trigger switch to move and the trigger conductive block does not contact with the second trigger block, the contact between the second sliding block and the conductive block is triggered, and the travel switch is provided with a third line except for opening and closing, so that the travel switch can detect the passing of an object with the size smaller than that of a detected object; and the travel switch can detect all passing objects.

Description

Technical Field

[0001] The invention relates to the technical field of travel switches, and more particularly to an automatic reset travel switch. Background Art

[0002] A travel switch is an electrical device that uses the collision or proximity of a moving part of a production machine to move its contacts, thereby connecting or disconnecting a control circuit to achieve a certain control purpose. When a module installed on a moving part of a production machine hits a travel switch, the contacts of the travel switch will move to switch the circuit. The principle of this action is similar to that of a button, but the difference is that one is manually operated and the other is triggered by a collision of a moving part. In the elevator field, the travel switch can be used to monitor the position of the elevator car and detect whether a fault has occurred.

[0003] There are some problems in the use of existing travel switches, as follows: During the use of the rotating impact component of the existing travel switch, it is necessary to adjust the extended length of the rotating impact component according to the detection position, and the service life of the rotating impact component is not guaranteed. It is necessary to install a rotating wheel at the impact position to convert the dynamic potential energy of the detection object when passing through into the rotational kinetic energy of the rotating wheel, thereby effectively ensuring the service life of the travel switch. However, the existing rotating impact component only installs the rotating wheel at the position farthest from the switch body, resulting in the need for precise adjustment of the travel switch during use, and the detection range of the travel switch is limited, which is not convenient for ensuring the normal use of the travel switch. Summary of the invention

[0004] In order to overcome the above defects of the prior art, the present invention provides an automatic reset travel switch to solve the problems existing in the above background technology.

[0005] The present invention provides the following technical solutions: an automatic reset travel switch, comprising a circuit trigger box, a rotating arm assembly is fixedly connected to the back of the circuit trigger box, the circuit trigger box comprises a circuit housing, a wiring groove is fixedly connected to the front of the circuit housing, a guide cylinder is fixedly connected to the back of the inner side of the circuit housing, sliding grooves are provided on both sides of the circuit housing, conductive blocks are installed on both sides of the circuit housing, a first trigger assembly is fixedly connected to the inner side of the circuit housing near the front, a first spring is fixedly connected to the back of the first trigger assembly, a trigger switch is fixedly connected to the back of the first spring, and a second trigger assembly is fixedly connected to the inner side of the circuit trigger box near the back.

[0006] Furthermore, the first trigger component includes a first fixed plate, a positioning conductive block is fixedly connected to the front side of the first fixed plate, a rubber expansion block is fixedly connected to the inner side of the positioning conductive block, a first trigger block is fixedly connected to the back side of the rubber expansion block, and a first contact groove is provided on the back side of the first trigger block.

[0007] Furthermore, the trigger switch includes a second fixed plate, and trigger conductive blocks are fixedly connected on both sides of the front and back sides of the second fixed plate, and a conductive matching arc is provided on the side of the trigger conductive block away from the second fixed plate, and first sliding blocks are fixedly connected on both sides of the second fixed plate, and a second sliding block is fixedly connected on the side of the first sliding block away from the second fixed plate.

[0008] Further, the rotating arm assembly includes a rotating cover shell, a first positioning bearing is installed at the bottom of the rotating cover shell, a first rotating shaft is installed on the inner side of the first positioning bearing, a first rotating disk is fixedly connected to the top of the first rotating shaft, a positioning rod is fixedly connected to the top of the first rotating disk, a rotating sleeve is installed on the outer side of the positioning rod, a first transmission rod is installed on the outer side of the rotating sleeve, a second U-shaped positioning frame is installed on the side of the first transmission rod away from the rotating sleeve, a connecting transmission rod is installed on the front side of the second U-shaped positioning frame, a second rotating disk is installed on the top of the positioning rod, and a second rotating shaft is installed on the top of the second rotating disk. A second bearing is installed on the outer side of the second rotating shaft, a threaded locating pin is installed on the top of the second rotating shaft, a guide square tube is clamped on the inner side of the second rotating shaft, a guide groove is installed on the outer side of the guide square tube, a first rotating wheel is installed on the back side of the top of the guide square tube, a first U-shaped positioning frame is installed on both sides of the guide groove, a first torsion spring is fixedly connected to the top of the rotating cover shell, a third rotating shaft is installed on the inner side of the first U-shaped positioning frame, a second torsion spring is installed on the top of the outer side of the third rotating shaft, two rotating positioning plates are installed on the outer side of the third rotating shaft, and a second rotating wheel is installed on the inner side of the two rotating positioning plates.

[0009] Furthermore, the second trigger assembly includes a third fixed plate, a pushing square groove is provided on the front side of the third fixed plate, second trigger blocks are installed on both sides of the front side of the third fixed plate, a second trigger groove is provided on the front side of the second trigger block, telescopic rods are installed on both sides of the back side of the third fixed plate, a limited circular plate is fixedly connected to the back side of the telescopic rod, a telescopic sleeve is sleeved on the outer side of the telescopic rod, a second spring is installed on the inner side of the telescopic sleeve, and a shock absorber is installed on the back side of the inner side of the telescopic sleeve.

[0010] Furthermore, the diameter of the first trigger block, the diameter of the trigger conductive block and the diameter of the second trigger block are the same, the size of the second trigger groove and the first contact groove are the same, the size of the first contact groove and the conductive matching arc match each other, and the side of the conductive block close to the circuit housing and the side of the inner side of the sliding groove away from the guide cylinder are on the same plane.

[0011] Furthermore, the width and thickness of the first sliding block are clearance matched with the width and thickness of the opening of the sliding groove, the width and thickness of the second sliding block are clearance matched with the width and thickness of the inner side of the sliding groove, and the diameter of the connecting transmission rod is clearance matched with the diameter of the inner side of the guide cylinder.

[0012] Furthermore, two ends of the first torque spring are fixedly connected to the rotating cover and the second rotating shaft respectively, and two ends of the second torque spring are fixedly connected to the third rotating shaft and the first U-shaped positioning frame respectively.

[0013] Technical effects and advantages of the present invention: During use of the present invention, a switch is installed at a detection position. When an object to be detected passes through the detection position, it hits the second rotating wheel, causing the second rotating wheel and the rotating positioning plate to rotate along the third rotating axis. After the object continues to move, the guide groove rotates until the outer side of the first rotating wheel contacts the surface of the moving object. The rotation of the guide groove drives the second rotating axis to rotate. The rotation of the guide groove causes the guide square tube to rotate, thereby synchronously driving the second rotating disk, the positioning rod, the first rotating disk and the first rotating axis to rotate. The positioning rod pulls the rotating sleeve, the first transmission rod and the second U-shaped positioning frame to move in the process of rotating along the center of the first rotating disk. The rotating sleeve and the first transmission rod are rotated in the process of rotating the positioning rod. The second U-shaped positioning frame rotates relative to the positioning rod, so that when the guide tube directs the connecting transmission rod, the connecting transmission rod will be pulled closer to the rotating cover, thereby driving the trigger switch to approach the first trigger assembly to open the travel switch. After the object passes the detection position, the first torque spring and the second torque spring will cause the guide square tube and the first rotating wheel to return to their original positions, so that the connecting transmission rod returns to its original position, and then the trigger switch is pushed back to its original position to close the travel switch. This can effectively ensure the detection range of the travel switch and facilitate the normal use of the travel switch. Due to the setting of the second rotating wheel, the detection range of the travel switch swing arm at the same position is larger, which is convenient for users to adjust the travel switch.

[0014] In the detection process of the travel switch of the present invention, when an object passes through the travel switch, the connecting transmission rod drives the second fixed plate, the first sliding block and the second sliding block to approach the rotating arm assembly and open the travel switch through the cooperation between the triggering conductive block, the conductive matching arc and the second triggering block and the second triggering groove. If the object pushes the rotating arm assembly to rotate a larger angle, it will continue to push the third fixed plate to move toward the back side, and then push the telescopic rod and the limit circular plate to move toward the back side, thereby compressing the second spring, and ensuring that the circuit continues to maintain the passage when the travel switch is opened, and the volume of the object can be judged according to the compression amount of the limit circular plate.

[0015] In the present invention, when the rotating arm assembly rotates to pull the trigger switch to move and the trigger conductive block does not contact the second trigger block, the contact between the second sliding block and the conductive block will be triggered. In addition to opening and closing, the third circuit of the travel switch enables the travel switch to detect the passage of an object smaller than the detection object, thereby ensuring that the travel switch can detect all passing objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the first cross-sectional structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the second cross-sectional structure of the present invention.

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the circuit trigger box of the present invention.

[0020] Figure 5 It is a schematic structural diagram of the first trigger component of the present invention.

[0021] Figure 6 It is a schematic diagram of the trigger switch structure of the present invention.

[0022] Figure 7 It is a schematic structural diagram of the rotating arm assembly of the present invention.

[0023] Figure 8 It is a schematic diagram of the structure of the second trigger component of the present invention.

[0024] The accompanying drawings are marked as follows: 1. Circuit trigger box; 101. Circuit housing; 102. Wiring slot; 103. Guide cylinder; 104. Sliding slot; 105. Conductive block; 106. First trigger assembly; 1061. First fixed plate; 1062. Positioning conductive block; 1063. Rubber telescopic block; 1064. First trigger block; 1065. First contact slot; 107. Trigger switch; 1071. Second fixed plate; 1072. Trigger conductive block; 1073. Conductive matching arc; 1074. First sliding block; 1075. Second sliding block; 108. First spring; 2. Rotating arm assembly; 201. Rotating cover; 202. First rotating shaft; 203. First positioning bearing; 204. First rotating disk; 205. Positioning rod; 206. Rotating sleeve; 207 , second rotating shaft; 208, second bearing; 209, second rotating disk; 2010, first torque spring; 2011, threaded positioning pin; 2012, guide groove; 2013, guide square tube; 2014, first rotating wheel; 2015, first U-shaped positioning frame; 2016, second torque spring; 2017, third rotating shaft; 2018, rotating positioning plate; 2019, second rotating wheel; 2021, first transmission rod; 2022, second U-shaped positioning frame; 2023, connecting transmission rod; 3, second trigger assembly; 301, third fixed plate; 302, pushing square groove; 303, second trigger block; 304, second trigger groove; 305, telescopic sleeve; 306, telescopic rod; 307, limiting circular plate; 308, second spring; 309, shock absorber. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the automatic reset travel switch involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0026] Reference Figure 1 and Figure 2The present invention provides an automatic reset travel switch, including a circuit trigger box 1, a rotating arm assembly 2 is fixedly connected to the back of the circuit trigger box 1, the circuit trigger box 1 includes a circuit housing 101, a wiring slot 102 is fixedly connected to the front of the circuit housing 101, a guide cylinder 103 is fixedly connected to the back of the inner side of the circuit housing 101, sliding slots 104 are provided on both sides of the circuit housing 101, conductive blocks 105 are installed on both sides of the circuit housing 101, a first trigger assembly 106 is fixedly connected to the inner side of the circuit housing 101 near the front, a first spring 108 is fixedly connected to the back of the first spring 108, a trigger switch 107 is fixedly connected to the back of the first spring 108, and a second trigger assembly 3 is fixedly connected to the inner side of the circuit trigger box 1 near the back.

[0027] In a preferred embodiment, the first trigger assembly 106 includes a first fixed plate 1061, a positioning conductive block 1062 is fixedly connected to the front of the first fixed plate 1061, a rubber expansion block 1063 is fixedly connected to the inner side of the positioning conductive block 1062, a first trigger block 1064 is fixedly connected to the back of the rubber expansion block 1063, and a first contact groove 1065 is provided on the back of the first trigger block 1064.

[0028] In a preferred embodiment, the trigger switch 107 includes a second fixed plate 1071, and trigger conductive blocks 1072 are fixedly connected on both sides of the front and back sides of the second fixed plate 1071, and a conductive matching arc 1073 is opened on the side of the trigger conductive block 1072 away from the second fixed plate 1071, and first sliding blocks 1074 are fixedly connected on both sides of the second fixed plate 1071, and a second sliding block 1075 is fixedly connected on the side of the first sliding block 1074 away from the second fixed plate 1071; when the rotating arm assembly 2 rotates to pull the trigger switch 107 to move and the trigger conductive block 1072 does not contact the second trigger block 303, the contact between the second sliding block 1075 and the conductive block 105 will be triggered, and the third circuit of the travel switch in addition to opening and closing enables the travel switch to detect the passage of objects with a volume smaller than the detection object, ensuring that the travel switch can detect all passing objects.

[0029] In a preferred embodiment, the rotating arm assembly 2 includes a rotating cover 201, a first positioning bearing 203 is installed at the bottom of the rotating cover 201, a first rotating shaft 202 is installed on the inner side of the first positioning bearing 203, a first rotating disk 204 is fixedly connected to the top of the first rotating shaft 202, a positioning rod 205 is fixedly connected to the top of the first rotating disk 204, a rotating sleeve 206 is installed on the outer side of the positioning rod 205, a first transmission rod 2021 is installed on the outer side of the rotating sleeve 206, a second U-shaped positioning frame 2022 is installed on the side of the first transmission rod 2021 away from the rotating sleeve 206, a connecting transmission rod 2023 is installed on the front side of the second U-shaped positioning frame 2022, a second rotating disk 209 is installed on the top of the positioning rod 205, a second rotating shaft 207 is installed on the top of the second rotating disk 209, and a second A second bearing 208 is installed on the outer side of the rotating shaft 207, a threaded positioning pin 2011 is installed on the top of the second rotating shaft 207, a guide square tube 2013 is clamped on the inner side of the second rotating shaft 207, a guide groove 2012 is installed on the outer side of the guide square tube 2013, a first rotating wheel 2014 is installed on the back side of the top of the guide square tube 2013, first U-shaped positioning frames 2015 are installed on both sides of the guide groove 2012, a first torque spring 2010 is fixedly connected to the top of the rotating cover 201, a third rotating shaft 2017 is installed on the inner side of the first U-shaped positioning frame 2015, a second torque spring 2016 is installed on the top of the outer side of the third rotating shaft 2017, two rotating positioning plates 2018 are installed on the outer side of the third rotating shaft 2017, and a second rotating wheel 2019 is installed on the inner side of the two rotating positioning plates 2018;During use, the switch is installed at the detection position. When the object to be detected passes through the detection position, it will hit the second rotating wheel 2019, causing the second rotating wheel 2019 and the rotating positioning plate 2018 to rotate along the third rotating axis 2017. Then, after the object continues to move, the guide groove 2012 will rotate until the outer side of the first rotating wheel 2014 contacts the surface of the moving object. The rotation of the guide groove 2012 will drive the second rotating axis 207 to rotate. The rotation of the guide groove 2012 causes the guide square tube 2013 to rotate, thereby synchronously driving the second rotating disk 209, the positioning rod 205, the first rotating disk 204 and the first rotating axis 202 to rotate. The positioning rod 205 will pull the rotating sleeve 206, the first transmission rod 2021 and the second U-shaped positioning frame 2022 to move during the rotation of the positioning rod 205. The first transmission rod 2021 will rotate relative to the positioning rod 205 and the second U-shaped positioning frame 2022, so that when the guide cylinder 103 directs the connecting transmission rod 2023, the connecting transmission rod 2023 will be pulled close to the rotating cover 201, thereby driving the trigger switch 107 close to the first trigger assembly 106 to open the travel switch. After the object passes the detection position, the first torque spring 2010 and the second torque spring 2016 will cause the guide square tube 2013 and the first rotating wheel 2014 to return to the original position, so that the connecting transmission rod 2023 returns to the original position, and then pushes the trigger switch 107 back to the original position to close the travel switch, which can effectively ensure the detection range of the travel switch and facilitate the normal use of the travel switch. In addition, due to the setting of the second rotating wheel 2019, the detection range of the travel switch swing arm at the same position is larger, which is convenient for users to adjust the travel switch.

[0030] In a preferred embodiment, the second trigger assembly 3 includes a third fixed plate 301, a pushing square groove 302 is provided on the front of the third fixed plate 301, second trigger blocks 303 are installed on both sides of the front of the third fixed plate 301, a second trigger groove 304 is provided on the front of the second trigger block 303, telescopic rods 306 are installed on both sides of the back of the third fixed plate 301, the back of the telescopic rod 306 is fixedly connected to a limited position circular plate 307, a telescopic sleeve 305 is sleeved on the outer side of the telescopic rod 306, a second spring 308 is installed on the inner side of the telescopic sleeve 305, and a shock absorber 309 is installed on the back of the inner side of the telescopic sleeve 305; during the detection process of the travel switch, when the object passes through When the travel switch is passed, the connecting transmission rod 2023 drives the second fixed plate 1071, the first sliding block 1074 and the second sliding block 1075 to approach the rotating arm assembly 2 and open the travel switch by triggering the cooperation between the conductive block 1072, the conductive matching arc 1073 and the second trigger block 303 and the second trigger groove 304. If the object pushes the rotating arm assembly 2 to rotate at a larger angle, it will continue to push the third fixed plate 301 to move toward the back, and then push the telescopic rod 306 and the limit circular plate 307 to move toward the back, thereby compressing the second spring 308, and ensuring that the circuit continues to maintain the passage when the travel switch is turned on, and the volume of the object can be judged according to the compression amount of the limit circular plate 307.

[0031] In a preferred embodiment, the diameter of the first trigger block 1064, the diameter of the trigger conductive block 1072 and the diameter of the second trigger block 303 are the same, the second trigger groove 304 and the first contact groove 1065 are the same size, the size of the first contact groove 1065 and the conductive matching arc 1073 match each other, and the side of the conductive block 105 close to the circuit housing 101 and the side of the inner side of the sliding groove 104 away from the guide cylinder 103 are on the same plane.

[0032] In a preferred embodiment, the width and thickness of the first sliding block 1074 and the width and thickness of the opening of the sliding groove 104 are clearance matched, the width and thickness of the second sliding block 1075 and the width and thickness of the inner side of the sliding groove 104 are clearance matched, and the diameter of the connecting transmission rod 2023 and the diameter of the inner side of the guide cylinder 103 are clearance matched.

[0033] In a preferred embodiment, two ends of the first torque spring 2010 are fixedly connected to the rotating housing 201 and the second rotating shaft 207 , respectively. Two ends of the second torque spring 2016 are fixedly connected to the third rotating shaft 2017 and the first U-shaped positioning frame 2015 , respectively.

[0034] The working principle of the present invention is as follows: during use, the switch is installed at the detection position. When the object to be detected passes through the detection position, it will hit the second rotating wheel 2019, causing the second rotating wheel 2019 and the rotating positioning plate 2018 to rotate along the third rotating axis 2017. Then, after the object continues to move, the guide groove 2012 will rotate until the outer side of the first rotating wheel 2014 contacts the surface of the moving object. The rotation of the guide groove 2012 will drive the second rotating axis 207 to rotate. The rotation of the guide groove 2012 causes the guide square tube 2013 to rotate, thereby synchronously driving the second rotating disk 209, the positioning rod 205, the first rotating disk 204 and the first rotating axis 202 to rotate. The positioning rod 205 will pull the rotating sleeve 206, the first transmission rod 2021 and the second U-shaped positioning frame 2022 to move during the rotation of the positioning rod 205. The tube 206 and the first transmission rod 2021 will rotate relative to the positioning rod 205 and the second U-shaped positioning frame 2022, so that when the guide cylinder 103 directs the connecting transmission rod 2023, the connecting transmission rod 2023 will be pulled close to the rotating cover 201, thereby driving the trigger switch 107 to approach the first trigger assembly 106, so that the travel switch is turned on. After the object passes the detection position, the first torque spring 2010 and the second torque spring 2016 will make the guide square tube 2013 and the first rotating wheel 2014 return to the original position, so that the connecting transmission rod 2023 returns to the original position, and then push the trigger switch 107 to return to the original position to close the travel switch, which can effectively ensure the detection range of the travel switch and facilitate the normal use of the travel switch. In addition, due to the setting of the second rotating wheel 2019, the detection range of the travel switch swing arm at the same position is larger, which is convenient for users to adjust the travel switch. During the detection process of the travel switch, when the object passes through the travel switch, the connecting transmission rod 2023 drives the second fixed plate 1071, the first sliding block 1074 and the second sliding block 1075 to approach the rotating arm assembly 2 and trigger the cooperation between the conductive block 1072, the conductive matching arc 1073 and the second trigger block 303 and the second trigger groove 304 to open the travel switch. If the object pushes the rotating arm assembly 2 to rotate at a greater angle, it will continue to push the third fixed plate 301 to move to the back side, and then push the telescopic rod 306 and the limit circular plate 307 to move to the back side, thereby compressing the second spring 308, and ensuring that the circuit continues to ensure the passage when the travel switch is opened, and the volume of the object can be judged according to the compression amount of the limit circular plate 307. When the rotating arm assembly 2 rotates and pulls the trigger switch 107 to move and the trigger conductive block 1072 does not contact the second trigger block 303, the contact between the second sliding block 1075 and the conductive block 105 will be triggered. In addition to opening and closing, the third circuit of the travel switch enables the travel switch to detect the passage of objects smaller than the detection object, ensuring that the travel switch can detect all passing objects.

[0035] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which can be a mechanical connection or an electrical connection, or the internal communication of two elements, or a direct connection. "upper", "lower", "left", "right", etc. are only used to indicate a relative position relationship. When the description is provided, it is conducive to the absolute position change of the object, and the relative position relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic reset travel switch, comprising a circuit trigger box (1), characterized in that: The back of the circuit trigger box (1) is fixedly connected to a rotating arm assembly (2). The circuit trigger box (1) comprises a circuit housing (101). The front of the circuit housing (101) is fixedly connected to a wiring slot (102). The back of the inner side of the circuit housing (101) is fixedly connected to a guide cylinder (103). Both sides of the circuit housing (101) are provided with sliding slots (104). Both sides of the circuit housing (101) are provided with conductive blocks (105). A first trigger assembly (106) is fixedly connected to the inner side of the circuit housing (101) near the front. A first spring (108) is fixedly connected to the back of the first trigger assembly (106). A trigger switch (107) is fixedly connected to the back of the first spring (108). A second trigger assembly (3) is fixedly connected to the inner side of the circuit trigger box (1) near the back.

2. An automatic reset travel switch according to claim 1, characterized in that: The first trigger component (106) comprises a first fixed plate (1061), the front side of the first fixed plate (1061) being fixedly connected to a positioning conductive block (1062), the inner side of the positioning conductive block (1062) being fixedly connected to a rubber telescopic block (1063), the back side of the rubber telescopic block (1063) being fixedly connected to a first trigger block (1064), and the back side of the first trigger block (1064) being provided with a first contact groove (1065).

3. An automatic reset travel switch according to claim 2, characterized in that: The trigger switch (107) comprises a second fixed plate (1071), both sides of the front and back sides of the second fixed plate (1071) are fixedly connected with trigger conductive blocks (1072), a side of the trigger conductive block (1072) away from the second fixed plate (1071) is provided with a conductive matching arc (1073), both sides of the second fixed plate (1071) are fixedly connected with first sliding blocks (1074), and a side of the first sliding block (1074) away from the second fixed plate (1071) is fixedly connected with a second sliding block (1075).

4. An automatic reset travel switch according to claim 3, characterized in that: The rotating arm assembly (2) comprises a rotating cover (201), a first positioning bearing (203) being installed at the bottom of the rotating cover (201), a first rotating shaft (202) being installed on the inner side of the first positioning bearing (203), a first rotating disk (204) being fixedly connected to the top of the first rotating shaft (202), a positioning rod (205) being fixedly connected to the top of the first rotating disk (204), a rotating sleeve (206) being installed on the outer side of the positioning rod (205), a first transmission rod (2021) being installed on the outer side of the rotating sleeve (206), a second U-shaped positioning frame (2022) being installed on the side of the first transmission rod (221) away from the rotating sleeve (206), a connecting transmission rod (2023) being installed on the front side of the second U-shaped positioning frame (2022), a second rotating disk (209) being installed on the top of the positioning rod (205), a second rotating shaft (207) being installed on the top of the second rotating disk (209), and the second rotating shaft (207) being installed on the top of the second rotating disk (209). A second bearing (208) is installed on the outer side of the second rotating shaft (207), a threaded positioning pin (2011) is installed on the top of the second rotating shaft (207), a guide square tube (2013) is clamped on the inner side of the second rotating shaft (207), a guide groove (212) is installed on the outer side of the guide square tube (2013), a first rotating wheel (2014) is installed on the back side of the top of the guide square tube (2013), and first U-shaped positioning frames (2014) are installed on both sides of the guide groove (2012). 5), a first torque spring (2010) is fixedly connected to the top of the rotating cover shell (201), a third rotating shaft (2017) is installed on the inner side of the first U-shaped positioning frame (2015), a second torque spring (2016) is installed on the top of the outer side of the third rotating shaft (2017), two rotating positioning plates (2018) are installed on the outer side of the third rotating shaft (2017), and a second rotating wheel (2019) is installed on the inner side of the two rotating positioning plates (2018).

5. The automatic reset travel switch according to claim 3, characterized in that: The second trigger assembly (3) comprises a third fixing plate (301), a pushing square groove (302) is provided on the front of the third fixing plate (301), second trigger blocks (303) are mounted on both sides of the front of the third fixing plate (301), a second trigger groove (304) is provided on the front of the second trigger block (303), telescopic rods (306) are mounted on both sides of the back of the third fixing plate (301), the back of the telescopic rod (306) is fixedly connected to a limiting circular plate (307), a telescopic sleeve (305) is sleeved on the outer side of the telescopic rod (306), a second spring (308) is mounted on the inner side of the telescopic sleeve (305), and a shock absorber (309) is mounted on the inner back of the telescopic sleeve (305).

6. An automatic reset travel switch according to claim 5, characterized in that: The diameter of the first trigger block (1064), the diameter of the trigger conductive block (1072) and the diameter of the second trigger block (303) are the same, the second trigger slot (304) and the first contact slot (1065) have the same size, the size of the first contact slot (1065) and the conductive matching arc (1073) match each other, and a side of the conductive block (105) close to the circuit housing (101) and a side of the inner side of the sliding slot (104) away from the guide cylinder (103) are on the same plane.

7. An automatic reset travel switch according to claim 4, characterized in that: The width and thickness of the first sliding block (1074) are clearance matched with the width and thickness of the opening of the sliding groove (104); the width and thickness of the second sliding block (1075) are clearance matched with the width and thickness of the inner side of the sliding groove (104); and the diameter of the connecting transmission rod (2023) is clearance matched with the diameter of the inner side of the guide cylinder (103).

8. The automatic reset travel switch according to claim 4, characterized in that: The two ends of the first torque spring (2010) are respectively fixedly connected to the rotating cover (201) and the second rotating shaft (207), and the two ends of the second torque spring (2016) are respectively fixedly connected to the third rotating shaft (2017) and the first U-shaped positioning frame (2015).

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