A built-in trigger pull cord control box

Abstract

The present invention discloses a built-in trigger type pull-cord control box, comprising a shell and a front cover, an alarm light and a cable terminal are installed on one side of the shell, an electronic control module is installed in the shell, the cable terminal is electrically connected to the electronic control module in the shell, at least one micro switch is provided on the electronic control module; a micro switch trigger mechanism is installed at the micro switch position on the electronic control module; a mounting hole is provided on the side wall of the shell corresponding to the micro switch trigger mechanism; and a working status indicator light is provided on the front cover. The use of a built-in trigger mechanism makes the overall structure of the pull-cord control box compact and small, occupies a small space, has a high space utilization rate, saves manufacturing materials, and reduces costs. At the same time, the present invention has the functions of a manual trigger button, a working status indicator light, and a multi-layer alarm light, and can realize a multi-directional trigger function, and can combine a variety of pull-cord control boxes with different structures and functions, thereby enhancing the diversity and flexibility of equipment use.

Description

Technical Field

[0001] The present invention belongs to the technical field of pull - rope control boxes for industrial automation production line systems, and particularly relates to a built - in trigger type pull - rope control box. Background Art

[0002] Pull - rope control boxes are widely used in industrial automation production line systems. For example, in an automobile production assembly line, a pull - rope control box is installed at each work station. During the production process, information such as quality problems or equipment failures can be reported by operating the pull - rope box. Currently, the trigger mechanisms of pull - rope control boxes on the market are all external - type, resulting in a large overall occupied space of the pull - rope control box, low space utilization rate, more consumables, and high costs.

[0003] The existing Chinese patent document with the publication number CN106098450A discloses an ASI - bus - type pull - rope box based on industrial standards. The micro - switch trigger mechanism of this patent is external - type, with more consumables. Its trigger mechanism is different from the structure of the present invention (the invention), and the overall occupied space of the pull - rope box is large. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a built - in trigger type pull - rope control box with a compact and small structure, small occupied space, high space utilization rate, less consumables, and reduced costs.

[0005] The present invention is realized as follows: A built - in trigger type pull - rope control box includes a housing and a front cover. After the housing and the front cover are hermetically connected, a closed chamber is formed. An alarm lamp is installed on one side surface of the housing, and a cable terminal is installed on the side surface where the alarm lamp is installed or other side surfaces. Inside the installation chamber, corresponding to the position of the cable terminal, an electronic control module is fixedly installed in the housing through fasteners. Inside the housing, the cable terminal is electrically connected to the electronic control module, and at least one micro - switch is provided on the electronic control module. It is characterized in that: a micro - switch trigger mechanism is installed corresponding to the position of the micro - switch on the electronic control module; an installation hole is provided on the side wall of the housing corresponding to the micro - switch trigger mechanism, and the protruding part of the micro - trigger mechanism from the installation hole is connected to the control pull - rope; a working - state indicator lamp is provided on the front cover.

[0006] In the above technical solution, preferably, the microswitch trigger mechanism includes a fixed sleeve. The fixed sleeve includes a connection disk. On both sides of the connection disk, there are an inner guide sleeve and an outer guide sleeve that are integral with the connection disk. The inner guide sleeve and the outer guide sleeve are provided with axially aligned and equal-diameter holes. The connection disk of the fixed sleeve is fixedly installed on the mounting hole on the side wall of the above-mentioned housing. The inner guide sleeve of the fixed disk is inserted into the housing inward from the mounting hole of the housing. A pull rope shaft is slidably inserted through the axially aligned hole. Inside the housing, the pull rope shaft extends out of the inner guide sleeve. A spring seat is fixedly installed on the pull rope shaft near the tail end through a retaining ring. A return spring is sleeved on the pull rope shaft and the inner guide sleeve between the spring seat and the inner wall of the housing. At the tail end of the pull rope shaft inside the housing, there is a tapered contact head mounting section. A positioning shoulder is provided on the tapered contact head mounting section. A tapered contact head is inserted through the tapered contact head mounting section. A limit retaining ring is provided at the outer end of the tapered contact head. The outer end of the pull rope shaft extends out of the outer guide sleeve. A limit section and a pull ring connection section are provided at the outer end of the pull rope shaft. The outer diameter of the limit section is greater than the inner diameter of the outer guide sleeve. The outer end of the pull rope shaft is connected with a pull ring member through a fastener. A follow-up dust-proof sheath is provided between the pull ring member and the outer guide sleeve.

[0007] In the above technical solution, preferably, a limit protrusion is provided inside the connection end of the dust-proof sheath and the outer guide sleeve. An annular groove is provided on the outer circumference of the outer guide sleeve. With the above structure, the use of a clamp connection in the prior art is eliminated. In the present invention, the limit is achieved through the cooperation of the limit protrusion and the annular groove, and at the same time, the sealing effect is ensured.

[0008] In the above technical solution, preferably, the pull ring member includes a pull ring seat and a pull ring. The pull ring seat is sleeved on the pull rope shaft, and a rivet is inserted through the end of the pull rope shaft. With the above structure, it is beneficial for processing and installation, improving the assembly efficiency and product quality.

[0009] In the above technical solution, preferably, an electronic control module protective cover is also provided inside the housing. The electronic control module protective cover is fixedly installed on the electronic control module or the housing through a fastener, which can prevent abnormal situations such as the wiring inside the pull rope control box from being wound around it, playing a protective role, and at the same time making the internal structure of the pull rope control box clear and beautiful, and facilitating disassembly and assembly.

[0010] In the above technical solution, preferably, the electronic control module protective cover includes a protective cover body and mounting seats provided at the four corners of the protective cover body. The protective cover body is provided with an arched mounting groove corresponding to the position of the microswitch trigger mechanism.

[0011] A sealing ring is provided between the inner guide sleeve and the mounting hole on the side wall of the above-mentioned housing, improving the sealing performance.

[0012] In the above technical solution, preferably, it further includes a manual trigger button installed on the front cover or the housing for controlling the working state of the warning light. It is used for manual pressing and triggering to realize other requests such as alarming, which enhances the diversity and flexibility of the equipment use.

[0013] It further includes a plugging member, and the plugging member is installed in the mounting hole of the housing through a fastener. During actual use, the mounting holes of the housing that do not require the installation of the microswitch trigger mechanism are plugged, reducing the influence of external factors such as dust and moisture on the electronic control module, improving the service life of the electronic control module at the same time, and reducing the failure rate.

[0014] A connecting ring is provided on the outer side surface of the plugging member. The adjacent pull rope control boxes can be connected in series through the pull ring.

[0015] The advantages and technical effects of the present invention: The present invention proposes a pull rope control box with a built-in trigger mechanism, which reduces the overall volume of the equipment. By adopting the built-in trigger mechanism, the overall structure of the pull rope control box is compact and small, occupying a small space, with high space utilization rate, saving production materials and reducing costs. At the same time, the present invention has a manual trigger button, a working state indicator light, a multi-layer warning light function, and can realize the multi-direction trigger function, and can combine pull rope control boxes with various different structures and functions, enhancing the diversity and flexibility of the equipment use. Description of the Drawings

[0016] Figure 1 is the front view of Embodiment 1 of the present invention;

[0017] Figure 2 is the left view of Embodiment 1;

[0018] Figure 3 is the three-dimensional exploded view of Embodiment 1;

[0019] Figure 4 is the structural schematic diagram of the electronic control module;

[0020] Figure 5 is the structural schematic diagram of the protective cover of the electronic control module;

[0021] Figure 6 is the structural schematic diagram of the microswitch trigger mechanism;

[0022] Figure 7 is the three-dimensional exploded view of the microswitch trigger mechanism;

[0023] Figure 8 is the structural schematic diagram of the fixing sleeve;

[0024] Figure 9 is the structural schematic diagram of the pull rope shaft;

[0025] Figure 10 It is a schematic diagram of the trigger structure of the microswitch;

[0026] Figure 11 It is a schematic diagram of the reset structure of the microswitch;

[0027] Figure 12 It is a schematic diagram of the structure of Embodiment 2;

[0028] Figure 13 It is a schematic diagram of the plugging member with a connecting ring;

[0029] Figure 14 It is a schematic diagram of the plugging member without a connecting ring.

[0030] In the figure, 1. housing; 1-1. mounting hole; 2. front cover; 3. bottom shell; 4. warning light; 5. cable terminal; 6. electronic control module; 6-1. microswitch; 7. microswitch trigger mechanism; 7-1. fixed sleeve; 7-2. connecting disc; 7-3. internal guide sleeve; 7-4. external guide sleeve; 7-5. shaft hole; 7-6. pull rope shaft; 7-7. spring seat; 7-8. return spring; 7-9. tapered contact head mounting section; 7-10. positioning shoulder; 7-11. tapered contact head; 7-12. limit retaining ring; 7-13. limit section; 7-14. pull ring connecting section; 7-15. pull ring member; 7-16. dust-proof sheath; 7-17. limit protrusion; 7-18. annular groove; 7-19. pull ring seat; 7-20. pull ring; 7-21. rivet; 7-22. sealing ring; 8. indicator light; 9. electronic control module protective cover; 9-1. protective cover body; 9-2. mounting seat; 9-3. arched mounting groove; 10. button; 11. plugging member; 11-1. sealing ring; 11-2. connecting ring. Specific Embodiments

[0031] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] Embodiment 1, please refer to Figures 1 to 5, An in-built trigger type pull cord control box, comprising a housing 1 and a front cover 2. After the housing and the front cover are hermetically connected, a closed chamber is formed. An alarm lamp 4 is installed on one side surface of the housing, and a cable terminal 5 is installed on the side surface where the alarm lamp is installed or other side surfaces. Inside the installation chamber, corresponding to the position of the cable terminal, an electronic control module 6 is fixedly installed on the inner bottom 3 of the housing by a fastener. The electronic control module 6 is mainly used for receiving a pull cord signal or a button request signal, and transmitting the signal to an external control system to realize functions such as alarming. Inside the housing, the cable terminal is electrically connected to the electronic control module, and at least one micro switch 6-1 is provided on the electronic control module; in this embodiment, three micro switches are provided; a micro switch trigger mechanism 7 is installed corresponding to the position of the micro switch on the electronic control module. In this embodiment 1, the case where the micro switch trigger mechanism 7 is installed horizontally is taken as an example for description. On the installation holes of the housing corresponding to the positions of the other two micro switches, a plugging member 11 is installed by a fastener, and a sealing ring 11-1 is provided between the plugging member and the installation hole; during actual use, for the installation holes of the housing where the micro switch trigger mechanism does not need to be installed, they are plugged to reduce the influence of external factors such as dust and moisture on the electronic control module, and at the same time improve the service life of the electronic control module and reduce the failure rate. In order to realize the series control of multiple groups of pull cord control boxes, a connecting ring 11-2 (such as Figure 13 ) is provided on the plugging member on the side surface. The plugging member located on the lower surface of the housing can be a plugging member with a connecting ring or a plugging member without a connecting ring (such as Figure 14 ); an installation hole 1-1 is provided on the side wall of the housing corresponding to the micro switch trigger mechanism, and the protruding part of the micro trigger mechanism from the installation hole is connected to the control pull cord; a working status indicator lamp 8 is provided on the front cover. The alarm lamp 4 has different levels, and the specific number of levels needs to be determined according to the number of micro switch trigger mechanisms. When the micro switch trigger mechanism is triggered (pressed), the corresponding status indicator lamp 8 will act (light up or flash), and at the same time, the corresponding alarm lamps 4 at different levels will act (light up or flash or turn into a flashing lamp).

[0033] In the above technical solution, preferably; please refer to Figures 6 to 9; The microswitch trigger mechanism 7 includes a fixed sleeve 7-1. The fixed sleeve includes a connecting disk 7-2. On both sides of the connecting disk, there are an inner guide sleeve 7-3 and an outer guide sleeve 7-4 that are integral with the connecting disk. The inner guide sleeve and the outer guide sleeve are provided with axially aligned and equal-diameter shaft holes 7-5. The connecting disk of the fixed sleeve is fixedly installed on the mounting hole 1-1 on the side wall of the above-mentioned housing. A sealing ring 7-22 is provided between the inner guide sleeve and the mounting hole on the side wall of the housing. The inner guide sleeve of the fixed disk is inserted into the housing 1 inward from the mounting hole of the housing. A pull rope shaft 7-6 is slidably inserted through the above-mentioned shaft hole. Inside the housing, the pull rope shaft extends out of the inner guide sleeve. A spring seat 7-7 is fixedly installed on the pull rope shaft near the tail end through a retaining ring 7-70. A return spring 7-8 is sleeved on the pull rope shaft and the inner guide sleeve between the spring seat and the inner wall of the housing. At the tail end of the pull rope shaft inside the housing, there is a tapered contact head mounting section 7-9. A positioning shoulder 7-10 is provided on the tapered contact head mounting section. A tapered contact head 7-11 is inserted through the tapered contact head mounting section. A limit retaining ring 7-12 is provided at the outer end of the tapered contact head. The outer end of the pull rope shaft extends out of the outer guide sleeve. A limit section 7-13 and a pull ring connection section 7-14 are provided at the outer end of the pull rope shaft. The outer diameter of the limit section is greater than the inner diameter of the outer guide sleeve. The outer end of the pull rope shaft is connected with a pull ring member 7-15 through a fastener. A follow-up dust-proof sheath 7-16 is provided between the pull ring member and the outer guide sleeve.

[0034] In the above structure, the return spring is compressed. One end is supported on the shoulder of the fixed sleeve, and the other end is supported on the spring seat. Under the elastic force of the return spring, the pull rope shaft moves to the left along the inner hole of the fixed sleeve, and its shoulder contacts the right end face of the fixed sleeve to reach equilibrium. The conical contact head is fixed to the left end of the pull rope shaft through a retaining ring. The dust-proof sheath is made of elastic rubber material and is corrugated. One end is fastened to the fixed sleeve, and the other end is fastened to the pull rope shaft. The dust-proof sheath can move and elongate with the pull rope shaft. The pull ring is fixed to the right end of the pull rope shaft through a thread. A rivet is installed in the small hole at the right end of the pull rope shaft to prevent the pull ring from falling off. The sealing ring is installed in the groove of the fixed sleeve.

[0035] When an emergency occurs on the production line, the operator pulls the pull rope at any point along the line on the spot, and the microswitch trigger mechanism is triggered. Specifically, its triggering process is as Figure 10As shown in the figure, the built-in microswitch trigger mechanism is fixed in the housing by screws. When an external force pulls the pull ring in the built-in microswitch trigger mechanism, when the force is greater than the spring force, the pull ring drives the pull rope shaft and drives the spring seat to compress the spring, causing the pull rope shaft and its contact head to move to the right together. As the contact head moves to the right, its conical surface gradually presses down the microswitch contact until the right end face of the spring seat contacts the left end face of the fixed sleeve. At this time, the cylindrical surface of the contact head presses the microswitch contact to the bottom, achieving triggering, the alarm sounds, the indicator light flashes, and the fault is immediately alarmed, improving the safety during the operation of the production line.

[0036] After the microswitch trigger mechanism is triggered, the alarm function is realized and the microswitch automatically resets. The specific process of the microswitch automatic reset is as Figure 11 shown in the figure. Remove the external force on the pull ring of the built-in microswitch trigger mechanism. The spring pushes the spring seat to drive the pull rope shaft and the contact head to move to the left together until the shoulder of the pull rope shaft contacts the right end face of the fixed sleeve. At this time, the contact head disengages from the microswitch and the microswitch resets.

[0037] In the above technical solution, preferably, a limiting protrusion 7-17 is provided inside the connection end of the dust-proof sheath 7-16 and the external guide sleeve, and an annular groove 7-18 is provided on the outer circumference of the external guide sleeve. The above structure eliminates the use of a clamp connector in the prior art. The present invention realizes limiting through the cooperation of the limiting protrusion and the annular groove, and at the same time ensures the sealing effect.

[0038] In the above technical solution, preferably, the pull ring member 7-15 includes a pull ring seat 7-19 and a pull ring 7-20. The above pull ring seat 7-19 and pull ring 7-20 can adopt an integral structure or a split threaded connection structure. The pull ring seat is sleeved on the pull rope shaft, and a rivet 7-21 is installed through the end of the pull rope shaft. The above structure is beneficial to processing and installation, improving the assembly efficiency and product quality.

[0039] In the above technical solution, preferably, an electronic control module protective cover 9 is further provided inside the housing. The electronic control module protective cover is fixedly installed on the electronic control module or the housing through fasteners, which can prevent abnormal situations such as the wiring in the pull rope control box from being wound around it, playing a protective role, and at the same time making the internal structure of the pull rope control box clear and beautiful, facilitating disassembly and assembly.

[0040] In the above technical solution, preferably, the electronic control module protective cover 9 includes a protective cover body 9-1 and mounting seats 9-2 provided at the four corners of the protective cover body. The protective cover body is provided with an arched mounting groove 9-3 corresponding to the position of the microswitch trigger mechanism.

[0041] A sealing ring 7-22 is provided between the internal guide sleeve and the mounting hole on the side wall of the above housing.

[0042] In the above technical solution, preferably, it further includes a manual trigger button 10 installed on the front cover or the housing for controlling the working state of the alarm lamp; a micro switch 6-1 is provided on the electronic control module corresponding to the manual trigger button. It is used for manual pressing and triggering to realize other requests such as alarming, enhancing the diversity and flexibility of equipment use. The alarm lamp 4 has different levels, and the specific number of levels needs to be determined according to the number of buttons 10 and micro switch trigger mechanisms 7. When the micro switch trigger mechanism 7 is triggered or the button 10 is pressed, the corresponding status indicator lamp 8 will act (light up or flash), and at the same time, the corresponding different-level alarm lamps 4 will act (light up or flash or turn to a flashing lamp).

[0043] When an emergency occurs on the production line, the working process of the pull cord control box is as follows:

[0044] (1) Triggering process of the pull cord control box:

[0045] When an emergency occurs on the production line, when the on-site operator pulls the pull cord ring of the micro switch trigger mechanism from the outside or presses the button, the corresponding micro switch closes. After the micro switch closes, it sends a trigger signal to the electronic control module 6. After receiving the trigger signal, the electronic control module controls the corresponding-level alarm lamp 4 to give an alarm, and at the same time, the electronic control module controls the corresponding status indicator lamp 8 located on the front cover to light up.

[0046] In addition, when a fault occurs or a request signal needs to be sent, the on-site operator manually presses the button 10 located on the front cover. The electronic control module 6 receives the button request signal, the electronic control module controls the alarm lamp 4 to give an alarm, and at the same time, the electronic control module issues a control signal to control the corresponding indicator lamp 8 located on the front cover to light up.

[0047] (2) Reset process of the pull cord control box:

[0048] When the worker releases the hand, that is, after removing the external force, the micro switch trigger mechanism in the pull cord control box automatically resets under the action of the return spring.

[0049] Example 2, please refer to Figure 12 ; in this embodiment, the micro switch trigger mechanism is installed in a vertical structure, and blocking members 11 are installed at the other two horizontal positions.

[0050] Advantages and technical effects of the present invention: The present invention proposes a pull - rope control box with a built - in trigger mechanism, which reduces the overall volume of the device. By adopting the method of integrating the trigger mechanism inside, the overall structure of the pull - rope control box is compact and small, occupying little space, having a high space utilization rate, saving production materials and reducing costs. At the same time, the present invention has a manual trigger button, a working - state indicator light, a multi - layer alarm light function, and a multi - direction trigger function. It can combine pull - rope control boxes with various different structures and functions, enhancing the diversity and flexibility of the device use.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention, such as using two horizontal micro - switch trigger mechanisms or two horizontal micro - switch trigger mechanisms and one vertical micro - switch trigger mechanism, shall all be included in the protection scope of the present invention.

Claims

1. A built-in trigger-type pull-cord control box, comprising a shell and a front cover, wherein the shell and the front cover are sealed and connected to form a closed chamber, an alarm light is installed on one side of the shell, a cable terminal is installed on the side where the alarm light is installed or on other sides, an electronic control module is fixedly installed in the shell by fasteners at a position corresponding to the cable terminal in the installation chamber, the cable terminal is electrically connected to the electronic control module in the shell, and at least one micro switch is provided on the electronic control module; characterized in that: A microswitch trigger mechanism is installed at the microswitch position corresponding to the electronic control module; a mounting hole is provided on the side wall of the shell corresponding to the microswitch trigger mechanism, and the microswitch trigger mechanism extends out of the mounting hole and is connected with a pull rope; a working status indicator light is provided on the front cover; the microswitch trigger mechanism includes a fixing sleeve, and the fixing sleeve includes a connecting disk, and both sides of the connecting disk are provided with an internal guide sleeve and an external guide sleeve that are integrated with the connecting disk, and the internal guide sleeve and the external guide sleeve are provided with connected and equal-diameter axial holes; the connecting disk of the fixing sleeve is fixedly installed on the mounting hole of the above-mentioned side wall of the shell, and the internal guide sleeve is inserted into the shell from the mounting hole of the shell, and a pull rope shaft is slidably installed in the above-mentioned shaft hole, and the pull rope shaft extends out of the internal guide sleeve in the shell. Towards the sleeve; a spring seat is fixedly installed on the rope pull shaft near the tail end through a retaining ring, and a return spring is mounted on the rope pull shaft and the internal guide sleeve between the spring seat and the inner wall of the shell; a conical touch-pressure head mounting section is provided at the tail end of the rope pull shaft in the shell, and a positioning shoulder is provided on the conical touch-pressure head mounting section; a conical touch-pressure head is installed on the conical touch-pressure head mounting section, and a limiting retaining ring is provided at the outer end of the conical touch-pressure head; an external guide sleeve is extended from the outer end of the rope pull shaft, and a limiting section and a pull ring connecting section are provided at the outer end of the rope pull shaft, the outer diameter of the limiting section is larger than the inner diameter of the external guide sleeve, and the outer end of the rope pull shaft is connected to a pull ring component through a fastener; a follow-up dustproof sleeve is provided between the pull ring component and the external guide sleeve.

2. The built-in trigger-type pull-cord control box according to claim 1, characterized in that: A limiting protrusion is arranged inside the connecting end of the dustproof sleeve and the external guide sleeve, and an annular groove is arranged on the outer circumference of the external guide sleeve.

3. The built-in trigger-type pull-cord control box according to claim 1, characterized in that: The pull ring component comprises a pull ring seat and a pull ring, wherein the pull ring seat is sleeved on the pull rope shaft, and a rivet is installed on the end of the pull rope shaft.

4. The built-in trigger-type pull-cord control box according to claim 1, characterized in that: An electronic control module protective cover is also provided in the shell, and the electronic control module protective cover is fixedly mounted on the electronic control module or the shell by fasteners.

5. The built-in trigger-type pull-cord control box according to claim 4, characterized in that: The electronic control module protective cover comprises a protective cover body, and mounting seats are arranged at the four corners of the protective cover body. The protective cover body is provided with an arched mounting groove corresponding to the position of the micro switch trigger mechanism.

6. The built-in trigger-type pull-cord control box according to claim 1, characterized in that: A sealing ring is provided between the inner guide sleeve and the mounting hole of the shell side wall.

7. The built-in trigger-type pull-cord control box according to any one of claims 1 to 6, characterized in that: It also includes a manual trigger button installed on the front cover or the housing for controlling the working state of the alarm light.

8. The built-in trigger-type pull-cord control box according to claim 7, characterized in that: Also included is a blocking component, which is installed in the mounting hole of the shell through a fastener.

9. The built-in trigger-type pull-cord control box according to claim 8, characterized in that: A connecting ring is provided on the outer side of the blocking component.

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