Key type emergency stop switch

Abstract

The utility model relates to the technical field of emergency stop buttons, and discloses a key type emergency stop switch which comprises a sleeve, a button, a lock cylinder, a mandrel, a torsion spring, a trigger piece and an unlocking key. Any person can press down the button to achieve sudden stop of the electrical equipment, industrial accidents are prevented or severity of the industrial accidents is restrained, but the person with an unlocking key can conduct unlocking operation, and safety of sudden stop operation is guaranteed. The situation that the electrical equipment is restarted by an unauthorized person under the condition that the fault reason of the electrical equipment is not eliminated, and unsafety is caused is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of emergency stop buttons, in particular to a key-type emergency stop switch. Background Art

[0002] The emergency stop button can also be called an "emergency stop button" or "emergency stop switch". As the name suggests, the emergency stop switch is a protective measure that people can take by quickly pressing the button when an emergency occurs. The structure of a conventional emergency stop switch can refer to the existing technology CN203503517U or CN218351359U. In the current emergency stop switch, when the button is pressed, the button body drops and self-locks to keep the electrical equipment stopped; when it needs to be reset, the electrical equipment can be restarted by manually turning the button or pulling it out; however, when resetting the button, only the corresponding operation is required, and unauthorized personnel can also operate it. It is easy for unauthorized personnel to restart the electrical equipment when the cause of the electrical equipment failure has not been eliminated, causing unsafe conditions. Utility Model Content

[0003] In view of this, the present invention proposes a key-type emergency stop switch, the purpose of which is to prevent the self-locking state of the emergency stop switch from being released by any person.

[0004] The solutions provided by this utility model include:

[0005] A key-type emergency stop switch, comprising:

[0006] Sleeve, button, lock cylinder, spindle, torsion spring, trigger and unlocking key;

[0007] A first channel is provided in the sleeve and runs axially therethrough, and a stopper is provided on the inner wall of the first channel;

[0008] The button is axially slidably disposed in the first channel, and a second channel is provided on the button and axially communicates with the first channel. At least two limiting strips are protruded from the inner wall of the second channel, and a limiting groove is formed between two adjacent limiting strips.

[0009] The lock core, the core shaft and the trigger are connected in sequence along the axial direction, the lock core is arranged in the second channel, and the core shaft is arranged in the first channel;

[0010] The lock core includes a housing, a lock pin radially slidingly arranged on the housing, and a spring driving the lock pin to pop out of the housing. The housing is provided with a lock hole for inserting the unlocking key.

[0011] The outer peripheral wall of the core shaft is provided with an L-shaped groove that is slidably engaged with the limit block, and the L-shaped groove includes a vertical groove section axially recessed on the outer surface of the core shaft and a horizontal groove section circumferentially recessed, and the horizontal groove section is provided at one end of the vertical groove section close to the lock core;

[0012] The unlocking key is used to retract the lock pin into the housing;

[0013] The torsion spring is used to apply an elastic force for axial movement and a torsional force for axial rotation to the core shaft;

[0014] Among them, in the initial state, the limit block is located in the vertical groove section at one end away from the lock core, and the outer side of the lock pin corresponds to the position of the limit bar; in the emergency stop state, the limit block is located in the horizontal groove section, and the lock pin is stuck in the limit groove.

[0015] As a further optional solution, a convex strip arranged along the axial direction is provided in the first channel, and a groove for the convex strip to be inserted into the outer wall of the button.

[0016] As a further optional solution, it further includes a fastening screw, which passes through the trigger member and the core shaft in sequence and is threadedly connected to the lock core; one end of the torsion spring is connected to the sleeve, and the other end is connected to the core shaft.

[0017] As a further optional solution, a mounting groove is provided on the outer peripheral wall of the core shaft, a first sealing ring is sleeved in the mounting groove, and the core shaft is sealingly slidably connected to the first channel of the sleeve through the first sealing ring.

[0018] As a further optional solution, the outer peripheral wall of the lock core shell is provided with a first limiting portion, and the core shaft is formed with a second limiting portion that protrudes radially from the outer peripheral wall of the lock core, and the button is arranged between the first limiting portion and the second portion so that the button and the lock core are relatively fixed in the axial direction.

[0019] As a further optional solution, a second sealing ring is provided between the nut of the fastening screw and the trigger member to achieve a sealed connection.

[0020] Compared with the prior art, the key-type emergency stop switch of the present application has at least the following beneficial effects: when the button of the key-type emergency stop switch is pressed, the core shaft rotates under the torsion drive of the torsion spring, and the limit block enters the horizontal groove section of the L-shaped groove to achieve axial fixation of the core shaft, and at the same time, the lock core rotates with the core shaft until the lock pin on the lock core enters the limit groove to achieve circumferential fixation of the lock core and the button, and when the lock core cannot rotate, the button is self-locked; the unlocking key needs to be inserted to disengage the lock pin from the limit groove and retract it into the housing, so that the lock core and the core shaft can rotate relative to the button, so that the limit block enters the vertical groove section from the horizontal groove section, and then the core shaft can move axially, thereby causing the button to rebound and achieve unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a key-type emergency stop switch according to an embodiment of the present utility model;

[0022] Figure 2 This is an exploded schematic diagram of a key-type emergency stop switch according to an embodiment of the present utility model;

[0023] Figure 3 This is a side view schematic diagram of a key-type emergency stop switch according to an embodiment of the present utility model;

[0024] Figure 4 yes Figure 3 Schematic cross-sectional view of AA in the figure;

[0025] Figure 5 yes Figure 3 Schematic cross-sectional view of the middle BB (in the initial state, the locking pin corresponds to the limit bar);

[0026] Figure 6 It is for Figure 5 Schematic diagram after the button is pressed;

[0027] Figure 7 This is a schematic diagram of the change in shape of the lock cylinder after the unlocking key is inserted.

[0028] In the figure, 1. sleeve; 11. first channel; 12. limit block; 13. convex strip; 2. button; 21. second channel; 22. limit strip; 23. limit groove; 24. groove; 3. lock core; 31. shell; 311. lock hole; 312. first limit part; 32. lock pin; 33. spring; 4. unlocking key; 5. core shaft; 51. L-shaped groove; 511. vertical groove section; 512. horizontal groove section; 52. mounting groove; 53. first sealing ring; 54. second limit part; 6. trigger member; 7. torsion spring; 8. fastening screw; 9. second sealing ring. DETAILED DESCRIPTION

[0029] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] refer to Figure 1-7 , an embodiment of the present utility model shows a key-type emergency stop switch, including a sleeve 1, a button 2, a lock cylinder 3, a core shaft 5, a torsion spring 7, a trigger member 6 and an unlocking key 4;

[0034] The sleeve 1 is provided with a first channel 11 that passes axially therethrough, and a limit block 12 is protruded from the inner wall of the first channel 11; the button 2 is axially slidably arranged in the first channel 11, and the button 2 is provided with a second channel 21 that is axially connected to the first channel 11, and the inner wall of the second channel 21 is protruded with at least two limit strips 22, and a limit groove 23 is formed between two adjacent limit strips 22; the lock core 3, the core shaft 5 and the trigger member 6 are connected in sequence along the axial direction, the lock core 3 is arranged in the second channel 21, and the core shaft 5 is arranged in the first channel 11; the lock core 3 includes a shell 31, a radial groove 23 on the shell 31 A locking pin 32 is arranged to slide and a spring 33 drives the locking pin 32 to pop out of the housing 31, and the housing 31 is provided with a lock hole 311 for inserting the unlocking key 4; the outer peripheral wall of the core shaft 5 is provided with an L-shaped groove 51 that slides with the limit block 12, and the L-shaped groove 51 includes a vertical groove section 511 axially recessed on the outer surface of the core shaft 5 and a horizontal groove section 512 circumferentially recessed, and the horizontal groove section 512 is arranged at one end of the vertical groove section 511 close to the lock core 3; the unlocking key 4 is used to retract the locking pin 32 into the housing 31; the torsion spring 7 is used to apply an elastic force for axial movement and a torsional force for axial rotation to the core shaft 5.

[0035] The button 2 is circumferentially fixed to the sleeve 1 and can only slide axially relative to the sleeve 1. Furthermore, the button 2 is axially fixed to the lock core 3, meaning that the button 2, lock core 3, spindle 5, and trigger 6 are all axially fixed to each other. The trigger 6 is used to stop the electrical device.

[0036] Specifically, in the initial state, when the lock core 3 is not inserted with the unlocking key 4, the limit block 12 is located in the vertical slot section 511, and under the elastic force provided by the torsion spring 7, the limit block 12 is located in the vertical slot section 511 away from the end of the lock core 3 (i.e. Figure 4 The bottom end of the lock pin 32 is positioned as shown in FIG. Figure 5 As shown, the outer side of the lock pin 32 corresponds to the position of the limit strip 22. Since the limit strip 22 blocks the pop-up path of the lock pin 32, the lock pin 32 cannot pop out at this time. When an emergency stop is required, the button 2 is pressed to convert the emergency stop switch from the initial state to the emergency stop state. During the conversion process, the button 2 is pressed, and the lock core 3, the core shaft 5 and the trigger member 6 move with the button 2, so that the limit block 12 moves to the end of the vertical groove section 511 close to the lock core 3 (i.e. Figure 4 At this time, driven by the torsion force of the torsion spring 7, the core shaft 5 can rotate, so that the limit block 12 enters the transverse groove section 512, so that the core shaft 5 is relatively fixed to the sleeve 1 in the axial direction; wherein, as Figure 6 As shown, when the torsion spring 7 drives the spindle 5 to rotate, the lock pin 32 on the lock core 3 is staggered with the limit strip 22 in the button 2, and the lock pin 32 pops out and enters the limit groove 23, so that the lock core 3 and the button 2 are relatively fixed in the circumferential direction, and the lock core 3 and the spindle 5 cannot rotate, resulting in the limit block 12 only being able to be in the horizontal groove section 512 and unable to enter the vertical groove section 511, thereby making the button 2 self-locking; when it is necessary to unlock, as shown in FIG. Figure 7 As shown, the unlocking key 4 needs to be inserted, and the unlocking key 4 retracts the lock pin 32 into the shell 31, that is, the lock pin 32 disengages from the limit groove 23, so that the lock core 3 can rotate relative to the button 2. Therefore, rotating the unlocking key 4 drives the lock core 3 and the core shaft 5 to rotate, so that the limit block 12 enters the vertical groove section 511 from the horizontal groove section 512, and under the elastic force provided by the torsion spring 7, the core shaft 5, lock core 3 and button 2 rebound and reset.

[0037] In this way, any person can press the button 2 to achieve an emergency stop of the electrical equipment, but only authorized personnel (i.e., personnel with the unlocking key 4) can perform the unlocking operation to ensure the safety of the emergency stop operation.

[0038] In some embodiments, in order to achieve relative fixation between the button 2 and the sleeve 1 in the circumferential direction, refer to Figure 2 and Figure 5 The first channel 11 is provided with a convex strip 13 arranged in the axial direction, and the outer wall of the button 2 is provided with a groove 24 for the convex strip 13 to be engaged. In this way, under the guidance of the convex strip 13 and the groove 24, the button 2 can only move in the axial direction and cannot rotate.

[0039] In some embodiments, in order to facilitate the fixation of the lock core 3, the core shaft 5 and the trigger member 6, as shown in FIG. Figure 2 and Figure 4 As shown, the lock core 3 also includes a fastening screw 8, which passes through the trigger 6 and the spindle 5 in sequence and is threadedly connected to the lock core 3. One end of the torsion spring 7 is connected to the sleeve 1, and the other end is connected to the spindle 5. In this way, the lock core 3, the spindle 5, and the trigger 6 are relatively fixed in the circumferential direction and in the axial direction, and the lock core 3 and the spindle 5 can rotate or move axially at the same time.

[0040] In some embodiments, to improve water and oil repellency, e.g. Figure 2 and Figure 4 As shown, a mounting groove 52 is provided on the outer peripheral wall of the core shaft 5 , and a first sealing ring 53 is sleeved in the mounting groove 52 . The core shaft 5 is slidingly connected to the first channel 11 of the sleeve 1 in a sealed manner through the first sealing ring 53 .

[0041] Preferably, a second sealing ring 9 is provided between the nut of the fastening screw 8 and the trigger member 6 to achieve a sealed connection. In this way, water or oil can be prevented from entering the gap between the fastening screw 8 and the trigger member 6.

[0042] In some embodiments, in order to facilitate the axial fixation between the lock core 3 and the button 2, as shown in FIG. Figure 4 As shown, the outer circumferential wall of the housing 31 of the lock core 3 is provided with a first stopper 312. The core shaft 5 is formed with a second stopper 54 that radially protrudes from the outer circumferential wall of the lock core 3. The button 2 is disposed between the first stopper 312 and the second stopper 54, thereby securing the button 2 and the lock core 3 relative to each other in the axial direction. Thus, when the button 2 is pressed or reset, the lock core 3 moves axially with the button 2. In this embodiment, the second stopper 54 is the top surface of the core shaft 5, the width of which is greater than the diameter of the housing 31, allowing the lock core 3 and the core shaft 5 to axially clamp the button 2.

[0043] In summary, the embodiment of the present invention provides a key-type emergency stop switch. When the button 2 is pressed, the core shaft 5 rotates under the torsion drive of the torsion spring 7, and the limit block 12 enters the horizontal groove section 512 of the L-shaped groove 51 to achieve axial fixation of the core shaft 5. At the same time, the lock core 3 rotates with the core shaft 5 until the lock pin 32 on the lock core 3 enters the limit groove 23 to achieve circumferential fixation of the lock core 3 and the button 2. When the lock core 3 cannot rotate, the button 2 is self-locked. The unlocking key 4 needs to be inserted to make the lock pin 32 disengage from the limit groove 23 and retract into the shell 31, so that the lock core 3 and the core shaft 5 can rotate relative to the button 2, so that the limit block 12 enters the vertical groove section 511 from the horizontal groove section 512, and then the core shaft 5 can move axially, thereby causing the button 2 to rebound and achieve unlocking.

[0044] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A key-type emergency stop switch, characterized in that: include: Sleeve, button, lock cylinder, spindle, torsion spring, trigger and unlocking key; A first channel is provided in the sleeve and runs axially therethrough, and a stopper is provided on the inner wall of the first channel; The button is axially slidably disposed in the first channel, and a second channel is provided on the button and axially communicates with the first channel. At least two limiting strips are protruded from the inner wall of the second channel, and a limiting groove is formed between two adjacent limiting strips. The lock core, the core shaft and the trigger are connected in sequence along the axial direction, the lock core is arranged in the second channel, and the core shaft is arranged in the first channel; The lock core includes a housing, a lock pin radially slidingly arranged on the housing, and a spring driving the lock pin to pop out of the housing. The housing is provided with a lock hole for inserting the unlocking key. The outer peripheral wall of the core shaft is provided with an L-shaped groove that is slidably engaged with the limit block, and the L-shaped groove includes a vertical groove section axially recessed on the outer surface of the core shaft and a horizontal groove section circumferentially recessed, and the horizontal groove section is provided at one end of the vertical groove section close to the lock core; The unlocking key is used to retract the lock pin into the housing; The torsion spring is used to apply an elastic force for axial movement and a torsional force for axial rotation to the core shaft; Among them, in the initial state, the limit block is located in the vertical groove section at one end away from the lock core, and the outer side of the lock pin corresponds to the position of the limit bar; in the emergency stop state, the limit block is located in the horizontal groove section, and the lock pin is stuck in the limit groove.

2. The key-type emergency stop switch according to claim 1, characterized in that: A convex strip arranged along the axial direction is provided in the first channel, and a groove for the convex strip to be inserted into the outer wall of the button.

3. The key-type emergency stop switch according to claim 1, characterized in that: It also includes a fastening screw, which passes through the trigger and the core shaft in sequence and is threadedly connected to the lock core; one end of the torsion spring is connected to the sleeve, and the other end is connected to the core shaft.

4. The key-type emergency stop switch according to claim 3, characterized in that: An installation groove is provided on the outer peripheral wall of the core shaft, a first sealing ring is sleeved in the installation groove, and the core shaft is slidingly connected to the first channel of the sleeve through the first sealing ring.

5. The key-type emergency stop switch according to claim 3, characterized in that: A first limiting portion is protruded from the outer peripheral wall of the lock core shell, and a second limiting portion is formed on the core shaft and protrudes radially from the outer peripheral wall of the lock core. The button is arranged between the first limiting portion and the second portion so that the button and the lock core are relatively fixed in the axial direction.

6. The key-type emergency stop switch according to claim 3, characterized in that: A second sealing ring is provided between the nut of the fastening screw and the trigger member to achieve a sealed connection.

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