A pull cord switch

Abstract

The utility model relates to a stay wire switch, including handle, pivot and bolt, be provided with two -way stay wire hole and double -position clamping groove on handle, the one end of pivot is connected with handle, its other end is equipped with the first connecting groove of drive control knob action, the bolt is perpendicular to the pivot setting, and the bolt can slide relative to the pivot, handle rotates to the preset angle, and the bolt embeds the clamping groove to lock the control knob state, pull the bolt and make it exit the clamping groove, realize control knob reset, the utility model can solve the prior art existence automatic reset leads to the technical problem of potential safety hazard, the operation direction is single, and the applicability is limited.

Description

Technical Field

[0001] This utility model belongs to the field of pull-cord switch technology, and specifically relates to a pull-cord switch. Background Technology

[0002] Pull-cord switches, as a critical safety protection device, are widely used in various industrial equipment and mechanical systems. Their main function is to promptly issue a stop signal by pulling a cord, thereby protecting the safety of equipment and personnel. Especially in emergencies, such as when equipment malfunctions or unexpected situations occur, workers do not need to risk going to the equipment's control knobs. Instead, they can pull the cord from a safe distance, causing the control knobs to rotate to the designated position under the action of the pull-cord switch, thus quickly stopping the equipment and effectively preventing accidents.

[0003] However, existing pull-cord switch technology has certain limitations. On the one hand, once the fault disappears due to non-human factors (such as power failure, environmental factors, etc.), some pull-cord switches may automatically reset and restart the equipment. This may result in the fault not being thoroughly investigated before operation resumes, increasing safety hazards. On the other hand, most pull-cord switches use a unidirectional pull method, limiting their application range and flexibility. Especially in complex or multi-dimensional working environments, a unidirectional pull mechanism cannot meet comprehensive safety requirements. Utility Model Content

[0004] In view of the various shortcomings of the existing technology, a pull-cord switch is proposed to solve the technical problems of safety hazards caused by automatic reset, single operation direction and limited applicability of the existing technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A pull-cord switch, comprising:

[0007] The rotating handle is equipped with a two-way pull wire hole and a dual-position slot.

[0008] A rotating shaft, one end of which is connected to the rotating handle, and the other end of which is provided with a first connecting groove for driving and controlling the operation of the knob;

[0009] And a pin, which is disposed perpendicular to the pivot and is slidable relative to the pivot;

[0010] When the handle is rotated to a preset angle, the pin is inserted into the slot to lock the control knob state; pulling the pin causes it to exit the slot, thereby resetting the control knob.

[0011] The technical solution is further configured such that the handle includes a handle-shaped part and a connecting part, the connecting part is configured as a disc, and a second connecting groove is provided inside for the rotating shaft to be embedded.

[0012] The technical solution is further configured such that the connecting part is provided with a locking groove perpendicular to the second connecting groove, and the locking member is embedded in the locking groove and passes through the rotating shaft.

[0013] The technical solution is further configured such that the bidirectional pull holes are symmetrically distributed at 180° on the handle-shaped part, and the pull holes are located on the central axis of the handle-shaped part.

[0014] The technical solution is further configured such that the dual-station slots are symmetrically distributed at 180° on the connecting part, and the straight line where the dual-station slots are located is perpendicular to the central axis of the handle-shaped part.

[0015] The technical solution is further configured such that a bushing is fitted around the outer periphery of the rotating shaft, the inner hole of the bushing is fitted with the rotating shaft to form a dynamic sealing explosion-proof surface, and the outer shaft surface of the bushing is fitted with the mounting surface to form a static sealing explosion-proof surface.

[0016] The technical solution is further configured such that the pin is slidably disposed inside the fixing block, and the fixing block is located on the side of the connecting part.

[0017] The technical solution is further configured such that a guide groove is provided inside the fixing block, a spring is provided between the pin and the guide groove, and a cover is provided at the end of the pin located on the outside of the fixing block.

[0018] The beneficial effects of this utility model are:

[0019] When the handle is rotated to the position where the slot and the pin are aligned, the pin engages in the slot to lock the control knob. Before the control knob is reset, the pin needs to be pulled out of the slot to ensure that manual inspection can be performed even if the fault is automatically cleared. By setting a bidirectional pull hole and a dual-position slot, adaptability is enhanced, allowing the pull switch to flexibly meet the operational needs of different angles and directions. Attached Figure Description

[0020] Figure 1 This is an isometric view of the pull-cord switch in an embodiment of this utility model;

[0021] Figure 2 This is a side view of the pull-cord switch in an embodiment of this utility model;

[0022] Figure 3 This is a front view of the pull-cord switch in an embodiment of this utility model;

[0023] Figure 4 yes Figure 3Sectional view of AA;

[0024] Figure 5 This is an exploded view of the pull-cord switch in an embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of the rotating handle in an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the fixing block in an embodiment of this utility model.

[0027] In the attached diagram: 1. Rotary handle; 101. Handle-shaped part; 102. Connecting part; 2. Pull wire hole; 3. Fixing block; 4. Bushing; 5. Cover; 6. Slot; 7. Pin; 8. Spring; 9. Rotary shaft; 10. Locking element; 11. First connecting groove; 12. Arc-shaped surface; 13. Notch; 14. Second connecting groove. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0029] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0030] According to an embodiment of this utility model, a pull-cord switch is provided. Please refer to [link / reference]. Figures 1 to 7 It includes a handle 1, a shaft 9, and a pin 7. The handle 1 is provided with a bidirectional pull hole 2 and a dual-position slot 6. One end of the shaft 9 is connected to the handle 1, and the other end is provided with a first connecting groove 11 for driving and controlling the knob. The pin 7 is set perpendicular to the shaft 9 and can slide relative to the shaft 9.

[0031] Furthermore, the first connecting groove 11 is configured as a flat groove. Compared with a circular groove, the flat groove reduces the possible sliding or slippage during rotation, thereby improving the force transmission efficiency from the rotating shaft 9 to the control knob.

[0032] When a malfunction occurs, rotating the handle 1, rotating the shaft 9, and the control knob rotate synchronously. The control knob is a switch knob that controls whether the equipment is powered on or off. When the handle 1 rotates to a preset angle, the pin 7 engages with the slot 6 to lock and maintain the control knob's state. At this time, the equipment is in a power-off state, which facilitates maintenance personnel to perform repairs. Before resetting the control knob, the pin 7 needs to be pulled out of the slot 6 to ensure that manual inspection can be forced even if the fault is automatically eliminated. By setting the bidirectional pull-cord hole 2 and the dual-position slot 6, adaptability is enhanced, allowing the pull-cord switch to flexibly cope with the operating requirements of different angles and directions.

[0033] In one example of a pull-cord switch in this embodiment, please refer to... Figures 1 to 7 The rotating handle 1 includes a handle-shaped part 101 and a connecting part 102. The connecting part 102 is configured as a disc, and a second connecting groove 14 is provided inside for the rotating shaft 9 to be embedded.

[0034] Furthermore, the second connecting groove 14 is set as a square groove, and correspondingly, the end of the rotating shaft 9 is set as a square head. The square groove and the square head are clearance fit, so there is no need to consider the directionality during the assembly process, which improves the assembly effect.

[0035] In one example of a pull-cord switch in this embodiment, please refer to... Figures 1 to 7 The connecting part 102 is provided with a locking groove perpendicular to the second connecting groove 14, and the locking member 10 is embedded in the locking groove and passes through the rotating shaft 9.

[0036] Furthermore, the second connecting groove 14 is disposed on the central axis of the connecting part 102, and the locking groove is disposed along the radial direction of the connecting part 102. The locking member 10 further enhances the connection stability between the rotating shaft 9 and the connecting part 102.

[0037] In one example of a pull-cord switch in this embodiment, please refer to... Figures 1 to 7 The bidirectional pull holes 2 are symmetrically distributed at 180° on the handle-shaped part 101, and the pull holes 2 are located on the central axis of the handle-shaped part 101.

[0038] Furthermore, the pull-wire hole 2 is used to thread a pull rope or steel wire rope, which runs to both sides of the equipment. In an emergency, the operator does not need to go to the control knob; the pull-wire switch can be activated from either direction of the equipment.

[0039] In one example of a pull-cord switch in this embodiment, please refer to... Figures 1 to 7The dual-position slots 6 are symmetrically distributed at 180° on the connecting part 102, and the line containing the dual-position slots 6 is perpendicular to the central axis of the handle-shaped part 101. Rotating the handle 1 from either direction triggers the same function. This design allows operators to quickly operate the pull-cord switch in emergencies without considering the specific position or direction of the handle, improving the speed and flexibility of emergency response.

[0040] In one example of a pull-cord switch in this embodiment, please refer to... Figures 1 to 7 The outer periphery of the rotating shaft 9 is fitted with a bushing 4. The inner hole of the bushing 4 is fitted with the rotating shaft 9 to form a dynamic sealing explosion-proof surface. The outer shaft surface of the bushing 4 is fitted with the mounting surface to form a static sealing explosion-proof surface.

[0041] It should be noted that the inner bore of bushing 4 and the rotating shaft 9 employ a transition fit to ensure a tight seal. This effectively prevents the propagation of explosive gases or dust through this interface during rotation, providing a reliable dynamic sealing explosion-proof function. Simultaneously, the transition fit between the outer shaft surface of bushing 4 and the equipment mounting surface also forms an effective static sealing explosion-proof layer, preventing explosive substances from the external environment from entering the equipment. The design of bushing 4 not only achieves explosion-proof functionality but also enhances sealing performance.

[0042] Furthermore, the outer shaft surface of the bushing 4 is provided with an O-ring groove. When the bushing 4 mates with the equipment mounting surface, it will press the O-ring to deform and achieve a sealing effect, preventing external moisture, dust and other contaminants from entering the equipment and extending the service life of the equipment.

[0043] In one example of a pull-cord switch in this embodiment, please refer to... Figures 1 to 7 The pin 7 is slidably disposed inside the fixing block 3, and the fixing block 3 is located on the side of the connecting part 102.

[0044] Furthermore, both the fixing block 3 and the bushing 4 are connected to the equipment mounting surface by bolts.

[0045] Furthermore, the side of the fixing block 3 adjacent to the connecting part 102 is set as an arc-shaped surface 12. The disc-shaped connecting part 102 is easier to match and integrate with the arc-shaped surface 12, reducing the assembly difficulty caused by shape mismatch. At the same time, a notch 13 is provided on the arc-shaped surface 12 to provide clearance space for the bushing 4, ensuring that the bushing 4 is not subject to unnecessary restrictions or interference.

[0046] In one example of a pull-cord switch in this embodiment, please refer to... Figures 1 to 7 The fixing block 3 has a guide groove inside, and a spring 8 is provided between the pin 7 and the guide groove. The end of the pin 7 located on the outside of the fixing block 3 is provided with a cover 5.

[0047] Furthermore, the cover 5 is connected to the first end of the pin 7 by bolts, and the other end of the pin 7 is provided with a boss for mounting the spring 8.

[0048] When the handle 1 is rotated to the preset angle, the slot 6 and the pin 7 are aligned. Under the action of the spring 8, the pin 7 sinks into the slot 6, thus maintaining the pull-cord switch action. When a reset is required, the cover 5 needs to be lifted, and the pin 7 will disengage from the slot 6.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0051] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0052] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0053] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A pull-cord switch, characterized in that, include: The rotating handle is equipped with a two-way pull wire hole and a dual-position slot. A rotating shaft, one end of which is connected to the rotating handle, and the other end of which is provided with a first connecting groove for driving and controlling the operation of the knob; And a pin, which is disposed perpendicular to the pivot and is slidable relative to the pivot; When the handle is rotated to a preset angle, the pin is inserted into the slot to lock the control knob state; pulling the pin causes it to exit the slot, thereby resetting the control knob.

2. The pull-cord switch according to claim 1, characterized in that, The handle includes a handle-shaped part and a connecting part. The connecting part is disc-shaped and has a second connecting groove inside for the rotating shaft to be embedded.

3. The pull-cord switch according to claim 2, characterized in that, The connecting part is provided with a locking groove perpendicular to the second connecting groove, and the locking member is embedded in the locking groove and passes through the rotating shaft.

4. The pull-cord switch according to claim 2 or 3, characterized in that, The bidirectional pull holes are symmetrically distributed at 180° on the handle-shaped part, and the pull holes are located on the central axis of the handle-shaped part.

5. The pull-cord switch according to claim 2 or 3, characterized in that, The dual-position slots are symmetrically distributed at 180° on the connecting part, and the straight line of the dual-position slots is perpendicular to the central axis of the handle-shaped part.

6. The pull-cord switch according to claim 1, characterized in that, A bushing is fitted around the outer periphery of the rotating shaft. The inner hole of the bushing is fitted with the rotating shaft to form a dynamic sealing explosion-proof surface, and the outer shaft surface of the bushing is fitted with the mounting surface to form a static sealing explosion-proof surface.

7. The pull-cord switch according to claim 2, characterized in that, The pin is slidably disposed inside the fixing block, which is located on the side of the connecting part.

8. The pull-cord switch according to claim 7, characterized in that, The fixing block has a guide groove inside, and a spring is provided between the pin and the guide groove. The end of the pin located on the outside of the fixing block is provided with a cover.

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