Emergency stop knob

Abstract

The utility model relates to an emergency stop knob, and relates to the technical field of knobs, the emergency stop knob comprises a fixed sleeve, a pressing cover arranged at one end of the fixed sleeve and a switch element fixedly arranged in the fixed sleeve, and a pressing rod is fixedly arranged on the pressing cover; an elastic clamping piece is arranged on the periphery of the pressing rod, a stepped clamping groove allowing the elastic clamping piece to be clamped in is formed in the inner wall of the fixed sleeve, a guide inclined block allowing the elastic clamping piece to rotate and be disengaged is fixedly arranged on the inner wall of the fixed sleeve, and the periphery of the pressing rod is sleeved with a reset piece used for enabling the pressing cover to reset. A middle sleeve used for being connected with the pressing rod is fixedly arranged on the side face of the pressing cover, the periphery of the middle sleeve is fixedly sleeved with an elastic sealing ring, the periphery of the elastic sealing ring abuts against the inner wall of the fixing sleeve, and a receding ring groove is formed in the side face, facing the pressing cover, of the elastic sealing ring. According to the invention, the possibility that external dust or other impurities enter the fixed sleeve is reduced, and the service life of the internal switch element is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of knobs, and in particular to an emergency stop knob. Background Art

[0002] The emergency stop knob, also known as the "emergency stop knob" or simply the emergency stop button, was born out of consideration for the safety of equipment and personnel. With the acceleration of industrialization and the widespread application of various mechanical equipment and electrical equipment, how to quickly cut off the power supply of equipment in an emergency and protect the safety of personnel and equipment has become an important issue. The emergency stop knob came into being in this context. It can cut off the power supply by quickly rotating or pressing the button in an emergency to prevent the situation from further deteriorating.

[0003] In the existing technology, the emergency stop button, as a key component of the safety equipment, usually includes an operating head, a mounting base and a switch element. The operating head realizes rapid operation and release in an emergency through the cooperation of a push rod and a spring; the switch element is responsible for switching signals and controlling the on and off of the circuit; and the mounting base plays a key role in fixing the operating head and connecting the switch element. When the operating head is pressed or rotated, the switch element will respond quickly, cut off the power supply, and ensure that the equipment stops running safely.

[0004] However, when the emergency stop button is used in harsh environments such as construction sites, the construction site environment is usually accompanied by a lot of dust, which may penetrate into the interior of the emergency stop button through the tiny gap between the operating head and the mounting base. Once the dust adheres to the switch element, it may interfere with the normal operation of the switch element, thereby affecting the performance of the emergency stop button, and may even cause the power supply to be unable to be cut off in time in an emergency, posing a serious safety hazard. Utility Model Content

[0005] The purpose of the present application is to provide an emergency stop knob to solve the problem in the above-mentioned related art that when the emergency stop button is used in harsh environments such as construction sites, external dust may enter the interior of the knob and affect its performance.

[0006] The emergency stop knob provided in this application adopts the following technical solution:

[0007] An emergency stop knob comprises a fixed sleeve, a pressing cover arranged at one end of the fixed sleeve and a switch element fixedly arranged inside the fixed sleeve, wherein the pressing cover is fixedly provided with a pressing rod located in the fixed sleeve and used for triggering the switch element; an elastic clamping piece is arranged on the outer periphery of the pressing rod, a stepped clamping groove for the elastic clamping piece to be clamped into is provided on the inner wall of the fixed sleeve, and a guiding inclined block for the elastic clamping piece to be rotated and disengaged is fixedly provided, and a reset piece for resetting the pressing cover is sleeved on the outer periphery of the pressing rod; an intermediate sleeve for connecting with the pressing rod is fixedly provided on the side surface of the pressing cover, an elastic sealing ring is fixedly sleeved on the outer periphery of the intermediate sleeve, the outer periphery of the elastic sealing ring is tightly pressed against the inner wall of the fixed sleeve, and a clearance ring groove is provided on the side surface of the elastic sealing ring facing the pressing cover.

[0008] By adopting the above technical scheme, due to the installation setting of the elastic sealing ring, when the emergency stop knob is used, the elastic sealing ring fixed on the outer periphery of the intermediate sleeve is pressed against the inner wall of the fixed sleeve, thereby reducing the possibility of external dust or other impurities entering the interior of the fixed sleeve from the gap between the intermediate sleeve and the fixed sleeve, thereby improving the dustproof performance and usability of the emergency stop knob and extending the service life of the internal switch elements; by opening the yield ring groove, it is helpful to improve the elastic performance of the outer periphery of the elastic sealing ring, and reduce the pressing force of the elastic sealing ring on the inner wall of the fixed sleeve, which is convenient for pressing down and resetting the pressing rod.

[0009] Optionally, an outer edge of the side of the intermediate sleeve facing the pressing cover is provided with an accommodating ring groove for the elastic sealing ring to be placed and fixed.

[0010] By adopting the above technical solution, due to the setting of the accommodating annular groove on the intermediate sleeve, when the intermediate sleeve is installed, the elastic sealing ring is fixed inside the accommodating annular groove, and the outer periphery of the elastic sealing ring is tightly pressed against the inner wall of the fixed sleeve.

[0011] Optionally, the reset member is a reset spring sleeved on the outer circumference of the pressing rod, a limit ring is fixed on the inner wall of the fixed sleeve, and a first positioning ring groove is provided on the side of the limit ring facing the pressing cover for inserting one end of the reset spring; the end of the reset spring facing the pressing cover is sleeved on the outer circumference of the intermediate sleeve, and a second positioning ring groove is provided on the outer edge of the side of the intermediate sleeve away from the pressing cover for inserting the reset spring.

[0012] By adopting the above technical solution, when the return spring is installed, one end of the return spring is inserted into the first positioning ring groove, and the other end is inserted into the second positioning ring groove, thereby improving the installation stability of the return spring during compression and return.

[0013] Optionally, a plug-in rod is fixedly provided on the side of the pressing cover facing the middle sleeve, a positioning through hole is provided on the middle sleeve for the plug-in rod to pass through, an annular hook is fixedly provided on the inner wall of the positioning through hole, and an annular groove is provided on the outer periphery of the plug-in rod for the annular hook to be inserted into.

[0014] By adopting the above technical solution, when the push cover and the intermediate sleeve are assembled, the plug-in rod on the push cover is passed through the positioning hole on the intermediate sleeve, and the annular hook on the inner wall of the positioning hole is inserted into the annular groove on the plug-in rod, thereby realizing the rapid assembly of the push cover and the intermediate sleeve and improving the assembly efficiency of the two.

[0015] Optionally, a rubber ring is provided on the side of the pressing cover, and a mounting ring groove for the rubber ring to be set in is opened on the outer periphery of the plug-in rod, and the outer periphery of the rubber ring is tightly pressed against the inner wall of the positioning through hole.

[0016] By adopting the above technical solution, due to the installation setting of the rubber ring, when the plug-in rod is fixed inside the positioning through hole, the rubber ring installation sleeve is arranged inside the installation ring groove, and the outer periphery of the rubber ring is tightly pressed against the inner wall of the positioning through hole, thereby improving the installation stability of the plug-in rod in the positioning through hole.

[0017] Optionally, the elastic clamping part includes a locking protrusion and a compression spring in a compressed state, and a placement groove for inserting the compression spring and the locking protrusion is opened on the outer periphery of the pressing rod, and the outer side surface of the locking protrusion can protrude from the placement groove and be inserted into the step slot under the pressure of the compression spring.

[0018] By adopting the above technical solution, due to the matching setting of the locking protrusion and the compression spring, when the emergency stop knob is pressed down, under the compression of the compression spring, the outer side surface of the locking protrusion protrudes from the placement groove and inserts into the stepped slot, thereby preventing the pressing rod and the pressing cover from automatically resetting in a natural state, thereby improving the performance of the emergency stop knob.

[0019] Optionally, a limiting groove for inserting one end of the compression spring is provided on the side of the locking protrusion facing the compression spring, a limiting rod is fixed on the inner wall of the placement groove, and the other end of the compression spring is sleeved on the outer circumferential surface of the limiting rod.

[0020] By adopting the above technical solution, due to the coordinated setting of the limit groove and the limit rod, one end of the compression spring is sleeved on the outer circumference of the limit rod, and the other end is placed in the corresponding limit groove, thereby reducing the possibility of the compression spring being offset or misplaced when pressed, and improving the installation stability of the compression spring.

[0021] Optionally, a guide bevel block is fixedly provided on the outer periphery of the pressing rod, a first guide bevel is provided on the guide bevel block, and a second guide bevel capable of abutting against the first guide bevel is provided on the inner wall of the stepped slot on the fixed sleeve.

[0022] By adopting the above technical solution, due to the matching arrangement of the first guiding bevel on the guiding bevel block and the second guiding bevel on the inner wall of the stepped slot, when the emergency stop knob is reset, the user holds the pressing cover to drive the pressing rod to rotate around the axis of the fixed sleeve, so that the elastic clip slides along the bevel of the guiding bevel, and the locking of the elastic clip by the stepped slot is released; at this time, the first guiding bevel abuts against the second guiding bevel, and then the pressing rod is reset under the action of the reset spring. In this process, the guiding bevel on the pressing rod slides along the second guiding bevel on the inner wall of the fixed sleeve, so that the pressing rod is reversely rotated and reset around the axis of the fixed sleeve.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. Due to the installation setting of the elastic sealing ring, when the emergency stop knob is used, the elastic sealing ring fixed on the outer periphery of the intermediate sleeve is pressed against the inner wall of the fixed sleeve, thereby reducing the possibility of external dust or other impurities entering the interior of the fixed sleeve from the gap between the intermediate sleeve and the fixed sleeve, thereby extending the service life of the internal switch element.

[0025] 2. The opening of the yielding ring groove on the elastic sealing ring not only helps to improve the elastic performance of the outer periphery of the elastic sealing ring, but also reduces the pressing force of the elastic sealing ring on the inner wall of the fixed sleeve, making it easier to press down and reset the pressing rod.

[0026] 2. Due to the installation setting of the rubber ring, when the plug-in rod is fixed inside the positioning through hole, the rubber ring installation sleeve is set inside the installation ring groove, and the outer periphery of the rubber ring is tightly pressed against the inner wall of the positioning through hole, which not only reduces the possibility of external dust entering the interior of the fixed sleeve from the installation gap between the positioning through hole and the plug-in rod, but also improves the installation stability of the plug-in rod in the positioning through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0029] Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the present application;

[0030] Figure 3 It is a cross-sectional structural diagram of the installation and matching of the switch element in the embodiment of the present application;

[0031] Figure 4It is a schematic diagram of the explosion structure of the installation distribution of the pressing cover and the intermediate sleeve in the embodiment of the present application;

[0032] Figure 5 It is a partial cross-sectional structural schematic diagram of the installation and cooperation between the pressing cover and the intermediate sleeve in the embodiment of the present application;

[0033] Figure 6 It is a schematic diagram of the exploded structure of the installation distribution of the intermediate sleeve and the pressing rod in the embodiment of the present application;

[0034] Figure 7 It is a partial cross-sectional structural schematic diagram of the embodiment of the present application embodying the installation and cooperation of the elastic clamping member;

[0035] Figure 8 It is a schematic cross-sectional structure diagram of the installation distribution of the guiding inclined blocks on the inner wall of the fixed sleeve according to an embodiment of the present application.

[0036] In the figure, 1, pressing cover; 11, plug-in rod; 111, annular groove; 112, mounting groove; 113, anti-rotation slot; 2, intermediate sleeve; 21, positioning through hole; 22, annular hook; 23, accommodating groove; 24, anti-rotation plug block; 25, first groove; 26, second positioning groove; 3, fixing sleeve; 31, first hook; 32, limiting retaining ring; 321, first positioning groove; 33, stepped groove; 331, second guiding inclined surface; 34, guiding inclined surface; 4, pressing rod; 41, placement groove; 42, limiting rod; 43, guiding inclined surface; 431, first guiding inclined surface; 5, reset member; 51, reset spring; 6, switch element; 7, rubber ring; 8, elastic sealing ring; 81, yielding groove; 9, elastic clamping member; 91, locking protrusion; 911, limiting groove; 92, compression spring. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0038] Example:

[0039] Reference Figure 1 , Figure 2 and Figure 3 , an emergency stop knob, comprising a fixed sleeve 3, a pressing cover 1 arranged at one end of the fixed sleeve 3 and a switch element 6 fixedly arranged inside the fixed sleeve 3, a pressing rod 4 located inside the fixed sleeve 3 is arranged on the side of the pressing cover 1 facing the fixed sleeve 3, a reset member 5 for resetting the pressing cover 1 is sleeved on the outer periphery of the pressing rod 4, and the switch element 6 is a conventional structure, which will not be described in detail here;

[0040] When the user uses the emergency stop knob, the user can press the push cover 1 to cause the push rod 4 to trigger the switch element 6 and disconnect the switch element 6; after releasing the pressure on the push cover 1, the push cover 1 and the push rod 4 can be reset under the action of the reset member 5.

[0041] Reference Figure 4 and Figure 5 An intermediate sleeve 2 for connecting with the pressing rod 4 is provided on the side of the pressing cover 1, and a plug-in rod 11 is integrally formed on the side of the pressing cover 1 facing the intermediate sleeve 2. A positioning through hole 21 for the plug-in rod 11 to pass through is provided on the intermediate sleeve 2, and an annular hook 22 is fixed on the inner wall of the positioning through hole 21, and an annular groove 111 for the annular hook 22 to be inserted is provided on the outer periphery of the plug-in rod 11; thereby, the pressing cover 1 and the intermediate sleeve 2 are installed and fixed.

[0042] Reference Figure 4 and Figure 5 A rubber ring 7 is provided on the side of the pressing cover 1, and a mounting ring groove 112 is provided on the outer periphery of the plug rod 11 for the rubber ring 7 to be inserted into. When the plug rod 11 is fixed inside the positioning through hole 21, the outer periphery of the rubber ring 7 is tightly pressed against the inner wall of the positioning through hole 21, thereby improving the installation stability of the plug rod 11.

[0043] Reference Figure 4 and Figure 5 An elastic sealing ring 8 made of rubber is fixedly sleeved on the outer periphery of the intermediate sleeve 2, and a relief ring groove 81 is provided on the side of the elastic sealing ring 8 facing the pressing cover 1. An accommodating ring groove 23 for the elastic sealing ring 8 to be placed and fixed is provided on the outer edge of the side of the intermediate sleeve 2 facing the pressing cover 1, and the inner side of the elastic sealing ring 8 can be fixed on the inner wall of the accommodating ring groove 23 by glue; when the intermediate sleeve 2 is installed, the outer periphery of the elastic sealing ring 8 is tightly pressed against the inner wall of the fixed sleeve 3.

[0044] Reference Figure 4 and Figure 6 The inner wall of the intermediate sleeve 2 is integrally formed with an anti-rotation plug block 24, and the outer periphery of the plug rod 11 is provided with an anti-rotation slot 113 for inserting the anti-rotation plug block 24, thereby reducing the possibility of relative rotation between the pressing cover 1 and the intermediate sleeve 2. The intermediate sleeve 2 and the fixed sleeve 3 are fixed by the first hook 31 and the first slot 25, which is a conventional structure and will not be described in detail here.

[0045] Reference Figure 5The reset member 5 is a reset spring 51 sleeved on the outer circumference of the pressing rod 4, wherein a limiting retaining ring 32 is integrally formed on the inner wall of the fixed sleeve 3, and a first positioning ring groove 321 for inserting one end of the reset spring 51 is opened on the side of the limiting retaining ring 32 facing the pressing cover 1; the end of the reset spring 51 facing the pressing cover 1 is sleeved on the outer circumference of the intermediate sleeve 2, and a second positioning ring groove 26 for inserting the reset spring 51 is opened on the outer edge of the side of the intermediate sleeve 2 away from the pressing cover 1.

[0046] Reference Figure 6 , Figure 7 and Figure 8 , an elastic clamping piece 9 is provided on the outer periphery of the pressing rod 4, a stepped clamping groove 33 for the elastic clamping piece 9 to be clamped into is provided on the inner wall of the fixed sleeve 3, and a guide inclined block 34 is fixedly provided for the elastic clamping piece 9 to rotate out of, and the cross-sectional thickness of the guide inclined block 34 increases in the direction away from the stepped clamping groove 33, and the lowest side of the guide inclined block 34 is connected with the bottom side of the stepped clamping groove 33; when the pressing rod 4 is pressed downward, the elastic clamping piece 9 is inserted into the stepped clamping groove 33 on the inner wall of the fixed sleeve 3, so as to avoid the pressing rod 4 and the pressing cover 1 (see Figure 5 ) Automatically reset in natural state;

[0047] When the pressing rod 4 needs to be reset, the user holds the pressing cover 1 and rotates it around the axis of the fixed sleeve 3, synchronously driving the pressing rod 4 to rotate, thereby causing the elastic clip 9 to slide along the inclined surface of the guiding bevel block 34, and finally releasing the lock of the stepped slot 33 on the elastic clip 9. At this time, the pressing cover 1 and the pressing rod 4 can be reset under the action of the reset spring 51.

[0048] Reference Figure 6 and Figure 7 The elastic clamping member 9 includes a locking protrusion 91 and a compression spring 92 in a compressed state. A placement groove 41 for the compression spring 92 and the locking protrusion 91 to be placed is provided on the outer periphery of the pressing rod 4. The locking protrusion 91 can protrude from the placement groove 41 and be inserted into the stepped card slot 33 under the pressure of the compression spring 92;

[0049] A limiting groove 911 for inserting one end of the compression spring 92 is provided on the side of the locking protrusion 91 facing the compression spring 92, and a limiting rod 42 is fixedly provided on the inner wall of the placement groove 41, and the other end of the compression spring 92 is sleeved on the outer peripheral surface of the limiting rod 42, thereby limiting the compression spring 92 and reducing the possibility of deflection or dislocation of the compression spring 92 during compression or resetting.

[0050] Reference Figure 6 and Figure 8 A guide bevel block 43 is integrally formed on the outer periphery of the pressing rod 4, wherein the guide bevel block 43 is provided with a first guide bevel surface 431, and a second guide bevel surface 331 capable of abutting against the first guide bevel surface 431 is provided on the inner wall of the stepped slot 33 of the fixing sleeve 3;

[0051] When the elastic clamping member 9 slides along the inclined surface of the guiding inclined block 34 and escapes from the locked step slot 33, it is necessary to rotate the elastic clamping member 9 on the pressing rod 4 around the axis of the fixing sleeve 3 in the direction close to the guiding inclined block 34, and at this time, the first guiding inclined surface 431 abuts against the second guiding inclined surface 331;

[0052] When the pressing rod 4 is reset under the action of the reset spring 51, the fixed sleeve 3 remains stationary. At this time, the guide bevel 43 on the pressing rod 4 slides along the second guide bevel 331 on the inner wall of the fixed sleeve 3. At this time, the pressing rod 4 rotates in the opposite direction around the axis of the fixed sleeve 3 to reset.

[0053] The implementation principle of the embodiment of the present application is:

[0054] When the emergency stop knob is pressed down, the pressing cover 1 is pressed to overcome the elastic force of the return spring 51, so that the pressing rod 4 is pressed down synchronously, and then the elastic clamping member 9 is inserted into the stepped clamping groove 33 on the inner wall of the fixed sleeve 3, and finally the pressing rod 4 triggers the switch element 6, so that the switch element 6 is disconnected;

[0055] When the emergency stop knob is reset, the user holds the pressing cover 1 to drive the pressing rod 4 to rotate around the axis of the fixed sleeve 3, so that the elastic clamping piece 9 slides along the inclined surface of the guiding bevel block 34, and the locking of the elastic clamping piece 9 by the stepped slot 33 is released; then the pressing rod 4 is reset under the action of the reset spring 51. During this process, the guiding bevel block 43 on the pressing rod 4 slides along the second guiding bevel 331 on the inner wall of the fixed sleeve 3, that is, the pressing rod 4 rotates in the opposite direction around the axis of the fixed sleeve 3 to reset.

[0056] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0057] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An emergency stop knob, comprising a fixed sleeve (3), a pressing cover (1) arranged at one end of the fixed sleeve (3), and a switch element (6) fixedly arranged inside the fixed sleeve (3), wherein the pressing cover (1) is fixedly provided with a pressing rod (4) located inside the fixed sleeve (3) and used for triggering the switch element (6); An elastic clamping piece (9) is provided on the outer periphery of the pressing rod (4); a stepped clamping groove (33) for the elastic clamping piece (9) to be clamped in is provided on the inner wall of the fixed sleeve (3); a guiding inclined block (34) is fixedly provided for the elastic clamping piece (9) to be rotated and disengaged; and a reset piece (5) for resetting the pressing cover (1) is sleeved on the outer periphery of the pressing rod (4); It is characterized in that An intermediate sleeve (2) for connecting with the pressing rod (4) is fixedly provided on the side of the pressing cover (1); an elastic sealing ring (8) is fixedly sleeved on the outer periphery of the intermediate sleeve (2); the outer periphery of the elastic sealing ring (8) is tightly pressed against the inner wall of the fixed sleeve (3); and a clearance ring groove (81) is provided on the side of the elastic sealing ring (8) facing the pressing cover (1).

2. An emergency stop knob according to claim 1, characterized in that: The outer edge of the side of the intermediate sleeve (2) facing the pressing cover (1) is provided with an accommodating ring groove (23) for the elastic sealing ring (8) to be placed and fixed.

3. The emergency stop knob according to claim 1, characterized in that: The reset member (5) is a reset spring (51) sleeved on the outer circumference of the pressing rod (4); a limit ring (32) is fixedly provided on the inner wall of the fixed sleeve (3); and a first positioning ring groove (321) for inserting one end of the reset spring (51) is provided on the side of the limit ring (32) facing the pressing cover (1); The end of the return spring (51) facing the pressing cover (1) is sleeved on the outer periphery of the intermediate sleeve (2), and the outer edge of the side of the intermediate sleeve (2) away from the pressing cover (1) is provided with a second positioning ring groove (26) for inserting the return spring (51).

4. The emergency stop knob according to claim 1, characterized in that: A plug-in rod (11) is fixedly arranged on the side of the pressing cover (1) facing the intermediate sleeve (2); a positioning through hole (21) is provided on the intermediate sleeve (2) for the plug-in rod (11) to pass through; an annular hook (22) is fixedly arranged on the inner wall of the positioning through hole (21); and an annular groove (111) is provided on the outer periphery of the plug-in rod (11) for the annular hook (22) to be inserted into.

5. The emergency stop knob according to claim 4, characterized in that: A rubber ring (7) is provided on the side of the pressing cover (1), and a mounting ring groove (112) for the rubber ring (7) to be sleeved is provided on the outer periphery of the plug-in rod (11), and the outer periphery of the rubber ring (7) is tightly pressed against the inner wall of the positioning through hole (21).

6. The emergency stop knob according to claim 1, characterized in that: The elastic clamping piece (9) comprises a locking protrusion (91) and a compression spring (92) in a compressed state. A placement groove (41) for the compression spring (92) and the locking protrusion (91) to be placed is provided on the outer periphery of the pressing rod (4). The outer side surface of the locking protrusion (91) can protrude from the placement groove (41) and be inserted into the stepped clamping groove (33) under the pressure of the compression spring (92).

7. An emergency stop knob according to claim 6, characterized in that: A limiting groove (911) for inserting one end of the compression spring (92) is provided on the side of the locking protrusion (91) facing the compression spring (92), a limiting rod (42) is fixedly provided on the inner wall of the placement groove (41), and the other end of the compression spring (92) is sleeved on the outer peripheral surface of the limiting rod (42).

8. The emergency stop knob according to claim 1, characterized in that: A guide bevel (43) is fixedly provided on the outer periphery of the pressing rod (4), a first guide bevel (431) is provided on the guide bevel (43), and a second guide bevel (331) capable of abutting against the first guide bevel (431) is provided on the inner wall of the stepped slot (33) on the fixed sleeve (3).

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