A miniature finger force trip unit
Patent Information
- Application Number
- CN202522114364.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-09-30
AI Technical Summary
[0003]目前现有的脱扣器，在使用的过程中需要人工进行复位，这种复位方式比较麻烦，且缺乏警告装置，工作人员无法快速得知脱扣器是否正常工作，进而存在安全隐患，因此亟需一种微型指力脱扣器来改善上述问题
1.该微型指力脱扣器，通过绝缘箱与绝缘筒的配合使用，起到阻断电力传输的作用，通过添加线圈，起到产生磁场，推动动铁心移动的作用，通过添加支撑弹簧，起到推动动铁心复位的作用，通过在顶杆的内部开设限位槽，起到便于限位杆滑动的作用，通过使用以上结构，在断电后，支撑弹簧会推动动铁心进行复位，避免人工进行干预，进而提高工作效率；
Smart Images
Figure CN224668682U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tripping device technology, specifically a miniature finger-force tripping device. Background Technology
[0002] The trip unit is mechanically connected to the circuit breaker and is used to release the holding mechanism and automatically disconnect the circuit breaker. Its function is to provide protection against electric shock and leakage when the vector sum of the currents passing through the zero-sequence current transformer is not equal to zero due to leakage current or electric shock. Voltage is generated on both sides of the secondary coil of the transformer and amplified by the integrated circuit. When the set value is reached, the power supply is cut off within 0.1 seconds through the leakage trip unit. Electromagnetic trip unit is connected in series with the protected circuit. When a normal current passes through the circuit, the electromagnetic force generated by the electromagnet is less than the tension of the reaction spring, and the armature cannot be attracted by the electromagnet, so the circuit breaker operates normally. When a short circuit fault occurs in the circuit, the current exceeds the normal current by several times. The electromagnetic force generated by the electromagnet is greater than the force of the reaction spring, and the armature is attracted by the electromagnet. Through the transmission mechanism, the armature pushes the free trip mechanism to release the main contacts. The main contacts separate under the action of the opening spring to cut off the circuit and provide short circuit protection.
[0003] Currently available trip units require manual reset during use. This reset method is cumbersome and lacks warning devices, making it difficult for staff to quickly determine whether the trip unit is working properly, thus posing a safety hazard. Therefore, there is an urgent need for a miniature finger-force trip unit to improve these issues. Utility Model Content
[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.
[0005] Therefore, one objective of this utility model is to propose a miniature finger-force release device to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.
[0006] To achieve the above objectives, one embodiment of this utility model provides a miniature finger-force release device, including a mounting frame. A reset structure is provided on one side of the mounting frame. The reset structure includes an insulating box. A limit frame is provided inside the insulating box. An insulating cylinder is provided inside the limit frame. A coil is provided inside the insulating cylinder. A support cylinder is provided inside the coil. A stationary iron core and a moving iron core are provided inside the support cylinder. A support spring and a limit rod are provided at the bottom of the moving iron core. A top rod is provided on the outside of the limit rod. A limit groove is formed inside the top rod.
[0007] The present invention is further configured such that: the insulating box is fixedly connected to one side of the mounting frame, the limiting frame is fixedly connected to the inside of the insulating box, the insulating cylinder is snapped into the inside of the support cylinder, and the coil is fixedly connected to the inside of the insulating cylinder and the support cylinder.
[0008] By adopting the above technical solution, the coil is fixedly connected inside the insulating cylinder and the support cylinder. The coil generates a magnetic field, the insulating cylinder prevents current from spreading, and the support cylinder limits the movement.
[0009] The present invention is further configured as follows: a miniature finger release device according to claim 1, characterized in that: the stationary iron core is fixedly connected to the inside of the support cylinder, the moving iron core is slidably connected to the inside of the support cylinder, the support spring and the limiting rod are both fixedly connected to the bottom of the moving iron core, and the limiting rod is slidably connected to the inside of the limiting groove.
[0010] By adopting the above technical solution, the limiting rod is slidably connected inside the limiting groove, wherein the sliding rod plays the role of preventing the moving iron core from tilting, and the limiting groove plays the role of preventing the moving iron core from falling off.
[0011] The present invention is further configured such that: an alarm structure is provided on the outside of the insulating box; the alarm structure includes a fixing frame and a copper wire; a connecting cylinder is provided on the outside of the copper wire; a traction rope is provided on one side of the connecting cylinder; an auxiliary block is provided at one end of the traction rope; a conductive rod is provided inside the auxiliary block; a guide frame is provided on the outside of the auxiliary block; a spring plate and a guide rod are provided on one side of the guide frame; a dry cell battery is provided inside the guide frame; a buzzer is provided at the bottom of the guide frame; and an acrylic shell is provided on the outside of the fixing frame.
[0012] By adopting the above technical solution, a dry cell battery is installed inside the guide frame. The guide frame facilitates the sliding of the auxiliary block, and the dry cell battery powers the buzzer.
[0013] The present invention is further configured such that: the fixing frame and the acrylic shell are both fixedly connected to one side of the insulation box; the two ends of the copper wire are respectively connected to the stationary iron core and the moving iron core; the connecting cylinder is fixedly connected to the outside of the copper wire; and the auxiliary block and the connecting cylinder are respectively connected to the two ends of the traction rope.
[0014] By adopting the above technical solution, the connecting cylinder is fixedly connected to the outside of the copper wire, where the copper wire plays a limiting role and the connecting cylinder plays a role in connecting the traction rope and the copper wire.
[0015] The present invention is further configured such that: the auxiliary block is slidably connected to the inside of the guide frame, the conductive rod is fixedly connected to the inside of the auxiliary block, the guide frame is fixedly connected to one side of the fixed frame, and the buzzer is fixedly connected to the bottom of the guide frame.
[0016] By adopting the above technical solution, the buzzer is fixedly connected to the bottom of the guide frame, which serves to quickly notify the staff.
[0017] In summary, the beneficial technical effects of this utility model are as follows: 1. This miniature finger-force release device, through the combined use of an insulating box and an insulating cylinder, serves to block power transmission. By adding a coil, it generates a magnetic field to move the moving iron core. By adding a support spring, it pushes the moving iron core to reset. By opening a limiting groove inside the top rod, it facilitates the sliding of the limiting rod. Using the above structure, after power is cut off, the support spring will push the moving iron core to reset, avoiding manual intervention and thus improving work efficiency. 2. This miniature finger-force release device connects the stationary and moving iron cores using copper wire, connects the auxiliary block and copper wire using a connecting cylinder and traction rope, connects the positive terminal of the battery using a conductive rod and spring plate, connects the negative terminal of the dry cell battery using a guide rod, powers the buzzer using a dry cell battery, and quickly notifies staff. Using this structure, staff can quickly determine if the release device is working properly and replace any malfunctioning devices to eliminate safety hazards.
[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the resetting structure of this utility model; Figure 3 This is a schematic diagram of the structure of the moving iron core of this utility model; Figure 4 This is a schematic diagram of the structure of the push rod of this utility model; Figure 5 This is a schematic diagram of the alarm structure of this utility model; Figure 6 This is a structural schematic diagram of utility model A.
[0020] In the diagram: 1. Mounting bracket; 2. Reset structure; 3. Insulation box; 4. Limiting bracket; 5. Insulation cylinder; 6. Coil; 7. Support cylinder; 8. Stationary iron core; 9. Moving iron core; 10. Support spring; 11. Limiting rod; 12. Top rod; 13. Limiting groove; 14. Alarm structure; 15. Fixing bracket; 16. Copper wire; 17. Connecting cylinder; 18. Traction rope; 19. Auxiliary block; 20. Conductive rod; 21. Guide frame; 22. Spring plate; 23. Guide rod; 24. Dry cell battery; 25. Buzzer; 26. Acrylic shell. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0022] Example 1 Reference Figures 1 to 4 This utility model discloses a miniature finger-force release device, including a mounting frame 1. A reset structure 2 is provided on one side of the mounting frame 1. The reset structure 2 includes an insulating box 3. A limit frame 4 is provided inside the insulating box 3. An insulating cylinder 5 is provided inside the limit frame 4. A coil 6 is provided inside the insulating cylinder 5. A support cylinder 7 is provided inside the coil 6. A stationary iron core 8 and a moving iron core 9 are provided inside the support cylinder 7. A support spring 10 and a limit rod 11 are provided at the bottom of the moving iron core 9. A top rod 12 is provided on the outside of the limit rod 11. A limit groove 13 is opened inside the top rod 12. In this embodiment, the mounting frame 1 serves to connect with the working equipment, the insulating box 3 serves to block electricity, and the limit frame 4 serves to fix the insulating cylinder 5.
[0023] Reference Figure 2 and Figure 3 The insulation box 3 is fixedly connected to one side of the mounting frame 1, the limiting frame 4 is fixedly connected to the inside of the insulation box 3, the insulation cylinder 5 is snapped into the inside of the support cylinder 7, and the coil 6 is fixedly connected to the inside of the insulation cylinder 5 and the support cylinder 7. In this embodiment, the insulation cylinder 5 plays the role of protecting the coil 6, the coil 6 plays the role of generating a magnetic field and driving the moving iron core 9 to slide, and the support cylinder 7 plays the role of facilitating the sliding of the moving iron core 9.
[0024] Reference Figure 2 , Figure 3 and Figure 4The stationary iron core 8 is fixedly connected to the inside of the support cylinder 7, and the moving iron core 9 is slidably connected to the inside of the support cylinder 7. The support spring 10 and the limiting rod 11 are both fixedly connected to the bottom of the moving iron core 9, and the limiting rod 11 is slidably connected to the inside of the limiting groove 13. In this embodiment, the support spring 10 plays the role of pushing the moving iron core 9 to reset, the limiting rod 11 plays the role of preventing the moving iron core 9 from tilting, and the limiting groove 13 plays the role of preventing the moving iron core 9 from falling off.
[0025] Reference Figure 1 , Figure 5 and Figure 6 An alarm structure 14 is provided on the outside of the insulation box 3. The alarm structure 14 includes a fixing frame 15 and a copper wire 16. A connecting tube 17 is provided on the outside of the copper wire 16. A traction rope 18 is provided on one side of the connecting tube 17. An auxiliary block 19 is provided at one end of the traction rope 18. A conductive rod 20 is provided inside the auxiliary block 19. A guide frame 21 is provided on the outside of the auxiliary block 19. A spring plate 22 and a guide rod 23 are provided on one side of the guide frame 21. A dry cell battery 24 is provided inside the guide frame 21. A buzzer 25 is provided at the bottom of the guide frame 21. An acrylic shell 26 is provided on the outside of the fixing frame 15. In this embodiment, the copper wire 16 serves to connect the stationary iron core 8 and the moving iron core 9. The connecting tube 17 serves to connect the traction rope 18 and the copper wire 16. The traction rope 18 serves to restrict the movement of the auxiliary block 19.
[0026] Reference Figure 1 , Figure 5 and Figure 6 The fixing frame 15 and the acrylic shell 26 are both fixedly connected to one side of the insulating box 3. The two ends of the copper wire 16 are respectively connected to the stationary iron core 8 and the moving iron core 9. The connecting cylinder 17 is fixedly connected to the outside of the copper wire 16. The auxiliary block 19 and the connecting cylinder 17 are respectively connected to the two ends of the traction rope 18. In this embodiment, the copper wire 16 plays the role of fixing the traction rope 18, and the auxiliary block 19 plays the role of driving the conductive rod 20 down.
[0027] Reference Figure 5 and Figure 6 The auxiliary block 19 is slidably connected to the inside of the guide frame 21, the conductive rod 20 is fixedly connected to the inside of the auxiliary block 19, the guide frame 21 is fixedly connected to one side of the fixed frame 15, and the buzzer 25 is fixedly connected to the bottom of the guide frame 21. In this embodiment, the guide frame 21 facilitates the sliding of the auxiliary block 19, the conductive rod 20 transmits power, the fixed frame 15 limits movement, and the buzzer 25 provides an alarm.
[0028] The implementation principle of this embodiment is as follows: During use, if the trip unit is energized, the coil 6 will also be energized. When the coil 6 is energized, it will generate a magnetic field and drive the iron core 9 to move towards the stationary iron core 8. During this process, the limit rod 11 will slide inside the limit groove 13, and the support spring 10 will be compressed until the moving iron core 9 and the stationary iron core 8 are in contact, so that the trip unit can open and transmit signals. When the trip unit loses power, the power of coil 6 will gradually disappear, and the strength of the magnetic field will gradually decrease until the power inside coil 6 is exhausted and the magnetic field generated by coil 6 will also disappear. After the magnetic field of coil 6 disappears, the support spring 10 will quickly recover its deformation and push the moving iron core 9 to move, so that the moving iron core 9 gradually moves away from the stationary iron core 8. During the process of the moving iron core 9 moving away from the stationary iron core 8, the limit rod 11 will slide inside the limit groove 13. However, since the overall radius of the limit groove 13 is not the same, the limit rod 11 cannot completely slide out of the limit groove 13, which can prevent the moving iron core 9 from falling off. When the equipment connected to the trip unit experiences leakage or the trip unit malfunctions, the voltages borne by the stationary iron core 8 and the moving iron core 9 will be different, preventing normal transmission. Therefore, the power transmitted from the moving iron core 9 and the stationary iron core 8 will be transferred to the copper wire 16. Upon receiving both types of power, the copper wire 16 will rapidly heat up and break. After the copper wire 16 breaks, the traction rope 18 will lose its restraint. Under the weight of the auxiliary block 19 and the conductive rod 20, the auxiliary block 19 and the conductive rod 20 will slide downwards inside the guide frame 21 and into the fixed frame 15. When the conductive rod 20 enters the interior of the fixed frame 15, both ends of the conductive rod 20 will first contact the spring plate 22 and the positive terminal of the dry cell battery 24. The dry cell battery 24 is fixedly connected to the interior of the fixed frame 15, and the current guide rod 23 is connected to the negative terminal of the dry cell battery 24. Therefore, after the power of its positive terminal is transferred to the spring plate 22 through the conductive rod 20, the buzzer 25 will be activated instantly and emit a piercing sound to notify the staff so that the staff can inspect and repair the equipment. After the abnormality is repaired and a new trip unit is replaced, the equipment can return to normal operation. The magnetic field generated by coil 6 can push the moving iron core 9 to move towards the stationary iron core 8, and the supporting spring 10 will not affect the movement of the moving iron core 9 towards the stationary iron core 8, and can also push the moving iron core 9 to reset. Part of the copper wire 16 is stuck inside the fixed frame 15 to prevent the moving iron core 9 from affecting the position of the conductive rod 20 during its movement.
Claims
1. A miniature finger-force release device, characterized in that: The device includes a mounting frame (1), a reset structure (2) is provided on one side of the mounting frame (1), the reset structure (2) includes an insulation box (3), a limit frame (4) is provided inside the insulation box (3), an insulation cylinder (5) is provided inside the limit frame (4), a coil (6) is provided inside the insulation cylinder (5), a support cylinder (7) is provided inside the coil (6), a stationary iron core (8) and a moving iron core (9) are provided inside the support cylinder (7), a support spring (10) and a limit rod (11) are provided at the bottom of the moving iron core (9), a top rod (12) is provided on the outside of the limit rod (11), and a limit groove (13) is opened inside the top rod (12).
2. The miniature finger-force release device according to claim 1, characterized in that: The insulation box (3) is fixedly connected to one side of the mounting frame (1), the limiting frame (4) is fixedly connected to the inside of the insulation box (3), the insulation cylinder (5) is snapped into the inside of the support cylinder (7), and the coil (6) is fixedly connected to the inside of the insulation cylinder (5) and the support cylinder (7).
3. A miniature finger-force release device according to claim 1, characterized in that: The stationary iron core (8) is fixedly connected to the inside of the support cylinder (7), the moving iron core (9) is slidably connected to the inside of the support cylinder (7), the support spring (10) and the limiting rod (11) are both fixedly connected to the bottom of the moving iron core (9), and the limiting rod (11) is slidably connected to the inside of the limiting groove (13).
4. A miniature finger-force release device according to claim 1, characterized in that: An alarm structure (14) is provided on the outside of the insulation box (3). The alarm structure (14) includes a fixing frame (15) and a copper wire (16). A connecting tube (17) is provided on the outside of the copper wire (16). A traction rope (18) is provided on one side of the connecting tube (17). An auxiliary block (19) is provided at one end of the traction rope (18). A conductive rod (20) is provided inside the auxiliary block (19). A guide frame (21) is provided on the outside of the auxiliary block (19). A spring plate (22) and a flow guide rod (23) are provided on one side of the guide frame (21). A dry cell battery (24) is provided inside the guide frame (21). A buzzer (25) is provided at the bottom of the guide frame (21). An acrylic shell (26) is provided on the outside of the fixing frame (15).
5. A miniature finger-force release device according to claim 4, characterized in that: The fixed frame (15) and the acrylic shell (26) are both fixedly connected to one side of the insulating box (3). The two ends of the copper wire (16) are respectively connected to the stationary iron core (8) and the moving iron core (9). The connecting cylinder (17) is fixedly connected to the outside of the copper wire (16). The auxiliary block (19) and the connecting cylinder (17) are respectively connected to the two ends of the traction rope (18).
6. A miniature finger-force release device according to claim 4, characterized in that: The auxiliary block (19) is slidably connected to the inside of the guide frame (21), the conductive rod (20) is fixedly connected to the inside of the auxiliary block (19), the guide frame (21) is fixedly connected to one side of the fixed frame (15), and the buzzer (25) is fixedly connected to the bottom of the guide frame (21).