CN211507415U - Rotary emergency stop switch - Google Patents

Abstract

There is provided a rotary emergency stop switch comprising: a movable shaft rotatable about an axial direction and having an opening extending from a surface in a radial direction toward an axis; the emergency stop head is arranged at the top of the movable shaft and can drive the movable shaft to rotate; the radial pressure spring is arranged in the open hole along the radial direction and is provided with a first end facing the axis side of the movable shaft and a second end facing the radial outer side; a stopper attached to the second end of the radial compression spring and sized to enter the opening; the fixed seat is used for accommodating at least one part of the movable shaft, the inner wall of the fixed seat is provided with a groove along the circumferential direction, and the depth of the groove is gradually reduced to zero along the first circumferential direction; one end of the axial spring is fixed to the upper bottom of the movable shaft; the sleeve leans on the lower part of fixing base. The movable shaft is installed from the upper end of the sleeve, the other end of the axial spring is fixed into the sleeve, and the axial spring rotates for a first angle along the first circumferential direction when the movable shaft is installed in the initial position of the sleeve.

Description

Rotary emergency stop switch

Technical Field

The utility model relates to a switch, more specifically relates to a rotatory scram switch.

Background

The rotary emergency stop switch is one of master control electric appliances, and when the machine is in a dangerous state or any other state needing to immediately stop the machine, the machine can be stopped by pressing the rotary emergency stop switch to the terminal position. And the rotary emergency stop switch is in a locking state after being pressed down, and can reset after being rotated by a certain angle, so that the rotary emergency stop switch cannot reset by itself after being pressed down and cannot reset due to mistaken touch.

There is a need for a rotary emergency stop switch that is reliable in locking and easy to reset.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rotatory scram switch that reliably just resets easily.

In at least one embodiment, the utility model discloses a rotatory scram switch includes:

a movable shaft rotatable about an axial direction and having an aperture extending from a surface in a radial direction toward an axial center;

the emergency stop head is arranged at the top of the movable shaft and can drive the movable shaft to rotate and move up and down in the axial direction;

a radial pressure spring that is installed in the opening of the movable shaft in a radial direction and has a first end facing an axial center side of the movable shaft and a second end facing a radial outside;

a stopper attached to the second end of the radial compression spring and sized to enter the opening of the movable shaft;

the fixing seat is used for accommodating at least one part of the movable shaft, a groove along the circumferential direction is formed in the inner wall of the fixing seat, and the depth of the groove is gradually reduced to zero along the first circumferential direction;

an axial spring having one end fixed to an upper bottom of the movable shaft;

the sleeve is abutted against the lower part of the fixed seat;

wherein the movable shaft is installed into the sleeve from the upper end of the sleeve, and the other end of the axial spring is fixed into the sleeve; and is

When the movable shaft is installed in the initial position of the sleeve, the axial spring rotates by a first angle along the first circumferential direction.

In some embodiments, the utility model discloses a rotatory scram switch still includes the briquetting, and this briquetting supports to lean on the axis body lower extreme that the loose axle extends from the upper bottom of loose axle to through the lower extreme fastening of screw with the axis body.

In some embodiments, when the crash stop head is pressed downward, the movable shaft is moved axially downward from the initial position to the pressed position such that the radial compression spring pushes the stopper out of the opening and snaps into the recess such that the movable shaft cannot now move axially upward despite being subjected to an axially upward spring force by the axial spring.

In some embodiments, when the scram head is rotated in the circumferential first direction by a second angle at the pressing position, the stopper is rotated out of the groove as the movable shaft is rotated in the circumferential first direction by the same angle, and the axial spring pushes the movable shaft to move toward the initial position after the stopper is rotated out of the groove.

In some embodiments, the pressing block is provided with a flange on the periphery thereof, and the lower end of the sleeve is provided with a first stopping part, after the movable shaft moves upwards to the initial position, the flange abuts against the first stopping part, so that the movable shaft cannot move upwards along the axial direction.

In some embodiments, an upper surface of the groove has a guide portion directed to a radially inner side, and the stopper has an arc-shaped end surface on a radially outer side so that the stopper can smoothly pass over the guide portion so as to enter the groove;

in some embodiments, the emergency stop head is provided with an abutting part below the emergency stop head, and the fixed seat is provided with a second stopping part at the upper end of the fixed seat, the abutting part and the second stopping part can abut along with the movement and the rotation of the emergency stop head and the movable shaft, the further axial downward movement of the emergency stop head is limited, and further the axial limiting of the movable shaft is realized.

In some embodiments, a lower portion of the scram head is provided with a barb and an upper portion of the movable shaft is provided with a step for engaging the barb, thereby enabling engagement between the scram head and the movable shaft.

In some embodiments, the rotary emergency stop switch of the present invention further comprises a waterproof ring and a fixing seat O-ring. The waterproof ring is arranged on the joint surface of the movable shaft and the fixed seat to prevent water and dirt from influencing the performance of the rotary emergency stop switch; and the O-shaped ring of the fixing seat is arranged on the joint surface of the fixing seat and the sleeve, so that the sealing between the sleeve and the fixing seat is realized.

In some embodiments, the upper bottom of the movable shaft is provided with a first fitting hole, and the inside of the sleeve is provided with a second fitting hole, and one end of the axial spring is fitted into the first fitting hole and the other end is fitted into the second fitting hole. When the movable shaft is installed in the initial position of the sleeve, the axial spring rotates for a first angle along a first circumferential direction, and the axial spring applies torsion along a second circumferential direction opposite to the first circumferential direction to the movable shaft.

In some embodiments, the lower end of the movable shaft is provided with a first limit boss and a second limit boss which are diametrically opposite, and the sleeve is provided with a first limit step and a second limit step which are diametrically opposite. When the initial position, first spacing boss and first spacing step butt have restricted the loose axle and have rotated along circumference second direction.

In some embodiments, when the scram head is rotated by a second angle in the circumferential first direction so that the second limit boss abuts against the second limit step, the rotation of the movable shaft in the circumferential first direction is limited, at which time the stopper is rotated out of the groove, and the movable shaft moves axially upward due to the axially upward force of the axial spring; and when the movable shaft moves upwards along the axial direction due to the upward elastic force of the axial spring, the axial spring applies a force rotating along the second direction in the circumferential direction to the movable shaft, so that the first limiting boss is abutted with the first limiting step again, and the rotary emergency stop switch is restored to the initial position.

In some embodiments, the circumferential first direction is clockwise, the axial spring is a left-handed spring, the first angle is 360 °, and the second angle is 60 °.

In some embodiments, the scram head is non-removably mounted to the top of the movable shaft.

The utility model provides a rotatory scram switch simple structure utilizes keeping off spacing between the recess of piece and fixing base to realize reliable locking to utilize the axial spring to realize the rotatory reset function of rotatory scram switch. Furthermore, the utility model provides a rotatory scram switch's waterproof circle still provides waterproof function, has further promoted rotatory scram switch's reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings which are needed to be used in the embodiments will be briefly described below, and the drawings which are described below are some embodiments of the present invention.

FIG. 1 is an exploded view of an example rotary scram switch, according to an embodiment;

FIG. 2A is a top view from above of a stationary seat with an example rotary scram switch in an initial position, according to an embodiment;

FIG. 2B is a top view from above the sleeve with an example rotary scram switch in an initial position, according to an embodiment;

3A-3B are cross-sectional views of an example rotary scram switch in an initial position, according to an embodiment;

FIG. 4A is a top view from above of a stationary seat with an example rotary scram switch in a depressed position, according to an embodiment;

FIG. 4B is a top view from above the sleeve with an example rotary scram switch in a depressed position, according to an embodiment;

5A-5B are cross-sectional views of an example rotary emergency stop switch in a depressed position, according to an embodiment;

FIG. 6A is a top view from above the stationary base of an example rotary scram switch according to an embodiment with the scram head rotated 60 to the right;

FIG. 6B is a top view from above the sleeve with an example rotary scram switch according to an embodiment with the scram head rotated 60 to the right;

FIG. 7 is a side exploded view of a movable shaft, an axial spring, a sleeve, and a pressure piece of an example rotary scram switch, according to an embodiment.

Detailed Description

The technical solution of the present invention will be described more clearly and completely with reference to the accompanying drawings, and the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts will fall into the protection scope of the present invention.

In the description of the present invention, the terms "upper", "lower", "left", "right", "axial", "radial", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a sequential or relative importance.

Furthermore, unless otherwise indicated, the terms "attached," "mounted," "connected," and the like are to be construed broadly and their meanings in the present disclosure may be understood as appropriate by those skilled in the art.

The utility model discloses a rotatory scram switch utilizes radial pressure spring, keeps off piece, sets up the cooperation of the ascending specific recess in circumference of fixing base and axial spring and realizes stable locking and reset.

FIG. 1 is an exploded view of an example rotary scram switch according to an embodiment. Referring to fig. 1, a rotary scram button according to an embodiment includes: scram head 10, fixed seat 14, movable shaft 20, axial spring 22, sleeve 28, radial compression spring 34, and catch 36.

The scram head 10 is mounted on top of the movable shaft 20.

The movable shaft 20 has an opening extending from the surface in a radial direction towards the axial center, into which opening the radial compression spring 34 and the stop 36 are fitted in use. The movable shaft is rotatable about the axial direction together with the scram head 10 and movable up and down in the axial direction together with the scram head. One end of the radial compression spring 34 faces the axial center side of the movable shaft 20, and the other end faces the radial outside. A stopper 36 is attached to the other end facing radially outward.

The fixed seat 14 is capable of accommodating a portion of the movable shaft 20, and the inner wall of the fixed seat 14 is provided with a groove 142 along the circumferential direction, the depth of the groove 142 gradually decreasing to zero along the circumferential first direction. The circumferential first direction is clockwise. When the crash stop head 10 is depressed downward, the stop 36 will enter the recess 142. When the scram head 10 is rotated by a second angle in the circumferential first direction, the catch 36 will rotate out of the groove 142. In some embodiments, the second angle is 60 °. And the flight 36 has an arcuate end surface on the radially outer side. This process will be described in detail below in conjunction with fig. 4A and 6A.

The sleeve 28 upper end is equipped with two bosss radially relatively to the lower extreme of fixing base 14 is equipped with two recesses radially relatively, and the cooperation is realized through the embedding cooperation between boss and the recess to sleeve 28 and fixing base 14. When installed, the loose axle 20 is loaded from the upper end of the sleeve 28. The axial spring 22 has one end fixed to an upper bottom portion 204 (shown in fig. 3A) of the movable shaft 20 and the other end fixed to the inside of the sleeve 28, and is rotated by a first angle in a circumferential first direction when the movable shaft 20 is fitted into the initial position of the sleeve 28, and the circumferential first direction is clockwise.

In some embodiments, scram head 10 is non-removably mounted on top of movable shaft 20.

In addition, in some embodiments, the rotary emergency stop switch further comprises a knob face frame 12 and a fixing seat O-ring 16. The fixing seat O-ring 16 is installed at the joint surface between the fixing seat 14 and the sleeve 28, and the fixing seat 14 is pressed by the knob face frame 12, so that the fixing seat O-ring 16 can seal between the fixing seat 14 and the sleeve 28.

In some embodiments, the rotary emergency stop switch further comprises a pressing piece 24, the pressing piece 24 abuts against the lower end of the shaft body of the movable shaft 20 extending from the upper bottom 204 of the movable shaft 20 and is fastened with the lower end of the shaft body by a screw 26, so that when the movable shaft 20 rotates or moves up and down, the pressing piece 24 will do the same rotation or up and down with the movable shaft 20.

In some embodiments, the rotary emergency stop switch further comprises a waterproof ring 18, and the waterproof ring 18 is installed at the joint surface of the movable shaft 20 and the fixed seat 14 to ensure that foreign dirt and water cannot enter the movable shaft 20, so that the waterproof performance of the rotary emergency stop switch is realized.

In some embodiments, the rotary scram switch further includes a rubber washer 30 and a fastening ring 32. A rubber grommet 30 is at the interface between the fastening ring 32 and the sleeve 28, making the sleeve 28 more stable in combination with the rotary emergency stop switch structure from the lower end of the sleeve 28.

Fig. 2A is a top view from above the stationary seat 14 with an example rotary scram switch in an initial position according to an embodiment; fig. 2B is a top view from above the sleeve 28 with an example rotary scram switch in an initial position, according to an embodiment.

Fig. 3A-3B are cross-sectional views of an example rotary emergency stop switch in an initial position, according to an embodiment. Referring to fig. 3A-3B, in some embodiments, the outer periphery of the pressure piece 24 is provided with a flange 242 and the lower end of the sleeve 28 is provided with a first stop 286. In the initial position, the flange 242 abuts the first stop 286. In addition, the lower end of the emergency stop head 10 is provided with an abutting part 104, and the upper end of the fixed seat 14 is provided with a second stopping part 144, and in the initial position, the abutting part 104 does not abut against the second stopping part 144.

Fig. 4A is a top view from above of the fixed base 14 with an example rotary scram switch in a depressed position according to an embodiment; fig. 4B is a top view from above of the sleeve 28 with an example rotary scram switch in a depressed position, where direction a is a circumferential first direction, according to an embodiment. Referring to fig. 4A, which shows the case where the first circumferential direction is clockwise, in the pressing position, the radially compressed spring 34 pushes the stopper 36 out of the opening, and the stopper 36 is in the groove 142, and the depth of the groove 142 is gradually reduced to zero circumferentially in the clockwise direction. Referring to fig. 4B, in some embodiments, the lower end of the movable shaft 20 is circumferentially provided with a first limit projection 206 and a second limit projection 208, and the sleeve 28 is radially oppositely provided with a first limit step 282 and a second limit step 284. When the movable shaft 20 is fitted into the initial position of the sleeve 28, the first limit projection 206 abuts the first limit step 282. Therefore, although the movable shaft 20 receives the return force of the axial spring 22 in the counterclockwise direction, the movable shaft 20 and the axial spring 22 cannot rotate counterclockwise due to the abutment between the first limit projection 206 and the first limit step 282.

Fig. 5A-5B are cross-sectional views of an example rotary emergency stop switch in a depressed position, according to an embodiment. Referring to fig. 5A, the abutment 104 abuts the second stopper 144, thereby limiting further downward axial movement of the scram head 10 and the movable shaft 20. Referring to fig. 5B, the upper surface of the groove 142 has a guide part 1422 directed to the inside in the radial direction. During the axial downward movement of the movable shaft 20, the stopper 36 can smoothly pass over the guide 1422 and eventually enter the groove 142, thereby making the movable shaft 20 unable to move axially upward. The rotary emergency stop switch is in a locked state at the moment.

Fig. 6A is a top view from above of the stationary base 14 with the example rotary scram switch according to an embodiment in a 60 ° clockwise rotation of the scram head 10; fig. 6B is a top view from above of the sleeve 20 with the example rotary scram switch according to an embodiment at 60 ° clockwise rotation of the scram head 10, where direction a is a circumferential first direction. Referring to fig. 6A, when the scram head 10 rotates clockwise by 60 °, the catch 36 smoothly rotates out of the groove 142 along the groove 142 with a depth gradually decreasing clockwise to zero and the inner wall portion of the fixing seat 14 pushes the catch 36 into the opening. Referring to fig. 6B, when the scram head 10 rotates clockwise by 60 °, the second limit boss 208 abuts against the second limit step 284, so that the movable shaft cannot rotate any further in the clockwise direction.

FIG. 7 is a side exploded view of the movable shaft 20, axial spring 22, sleeve 28, and press block 24 of an example rotary scram switch, according to an embodiment. Referring to fig. 7, the upper bottom 204 of the movable shaft 20 is provided with a first fitting hole 210, the sleeve 28 is provided with a second fitting hole 288, and in the case that the circumferential first direction is clockwise, the axial spring 22 is a left-hand spring, and vice versa. The axial spring 22 is fitted into the first fitting hole 210 at one end and into the second fitting hole 288 at the other end, whereby the axial spring 22 is fixed to the movable shaft 20 and the sleeve 28. As described above, when the movable shaft 20 is inserted into the sleeve 28 in the initial position, the axial spring 22 is rotated clockwise by the first angle, so that the axial spring 22 will have a torsion force returning in the counterclockwise direction. The first angle is dependent upon the axial relative positions of the first and second mounting holes 210, 288, and thus the first angle may be selected in a number of ways. In an embodiment in accordance with the present invention, the first assembly hole 210 is axially opposite the second assembly hole 288, and the first angle is 360 °.

The use of the rotary emergency stop switch according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

When the emergency stop head 10 of the rotary emergency stop switch is pressed downwards, the movable shaft 20 moves downwards from an initial position (refer to fig. 3A-3B) to a pressing position (refer to fig. 5A-5B), in the process, the stop piece 36 passes through the guide part 1422 of the groove 142 and compresses the radial pressure spring 34 towards the axis of the movable shaft 20, and finally the abutting part 104 below the emergency stop head 10 abuts against the second stop part 144 arranged at the upper end of the fixed seat 14, so that the emergency stop head 10 is limited from further moving downwards. At this time, the stopper 36 has already passed over the guide portion 1422, so that the stopper 36 is pushed out of the opening by the elastic force of the radial compression spring 34 and caught in the groove 142, and at this time, although the axial spring 22 exerts an axially upward elastic force on the movable shaft 20, the groove 142 restricts the position of the stopper 36 so that the movable shaft 20 cannot move upward. In an embodiment, the upper surface of the groove 142 has a guide part 1422 directed to the radially inner side, whereby the stopper 36 may smoothly enter the groove 142.

After the emergency situation is relieved, referring to fig. 6A and 6B, the scram head 10 is rotated 60 ° in the clockwise direction, and the stopper 36 will be rotated out of the groove 142 along the gradually decreasing depth of the groove 142. After the stopper 36 is rotated out of the groove 142, the second limit projection 208 is rotated to a position abutting against the second limit step 284, so that further rotation in the clockwise direction is limited, and the axial spring 22 pushes the movable shaft 20 to move upward by the axially upward elastic force. And the axial spring 22 has a torsion force in the counterclockwise direction, the axial spring 22 will rotate with the movable shaft 20 in the counterclockwise direction to return until the first limit projection 206 again abuts the first limit step 282.

Referring to fig. 3A and 5A, during the process of moving the movable shaft 20 axially upward to the initial position, the flange 242 abuts against the first stop 286 to limit the position, so that the movable shaft 20 cannot move axially upward.

Referring to fig. 3A or 5A, the lower portion of the scram head 10 is provided with a barb 102, and the upper portion of the movable shaft 20 is provided with a step 202, and the barb 102 engages with the step 202 to achieve the engagement between the scram head 10 and the movable shaft 20. Because the rotary emergency stop switch in the prior art is mostly screwed by threads, the loosening condition is easy to occur after the rotary emergency stop switch is rotated and reset for many times. The barb snap provides a more secure fit between the scram head 10 and the movable shaft 20.

The above examples are merely for clarity of illustration and are not intended to limit the embodiments. It will be apparent to those skilled in the art that other variations and modifications can be made on the basis of the foregoing description, and any obvious variations and modifications will still fall within the scope of the present invention.

Claims (14)

1. A rotary scram switch, comprising:

a movable shaft (20), said movable shaft (20) being rotatable about an axial direction and having an aperture extending from a surface in a radial direction towards an axial center;

the emergency stop head (10) is arranged at the top of the movable shaft (20), and can drive the movable shaft (20) to rotate;

a radial compression spring (34), the radial compression spring (34) being installed in the opening in the radial direction, and having a first end facing the axial center side of the movable shaft (20) and a second end facing the radial outside;

a stop (36), said stop (36) attached to said second end of said compression radial spring (34) and sized to enter said aperture;

the fixed seat (14) is used for accommodating at least one part of the movable shaft (20), a groove (142) along the circumferential direction is formed in the inner wall of the fixed seat (14), and the depth of the groove (142) is gradually reduced to zero along the first circumferential direction;

an axial spring (22), one end of the axial spring (22) being fixed to an upper bottom portion (204) of the movable shaft (20);

a sleeve (28), the sleeve (28) is abutted against the lower part of the fixed seat (14),

wherein the movable shaft (20) is fitted into the sleeve (28) from the upper end of the sleeve (28), and the other end of the axial spring (22) is fixed into the sleeve (28); and is

When the movable shaft (20) is installed in the initial position of the sleeve (28), the axial spring (22) rotates by a first angle along the circumferential direction.

2. The rotary emergency stop switch according to claim 1, further comprising a pressing block (24), wherein the pressing block (24) abuts against a lower end of a shaft body of the movable shaft (20) extending from the upper bottom (204) of the movable shaft (20) and is fastened with the lower end of the shaft body by a screw (26).

3. The rotary scram switch according to claim 2, characterized in that said radial compression spring (34) is configured to eject said catch (36) out of said opening and into said recess (142) when said movable shaft (20) is in a depressed position.

4. The rotary scram switch of claim 3, characterized in that the axial spring (22) is configured to urge the movable shaft (20) to move towards the initial position when the scram head (10) is rotated in the circumferential first direction by a second angle in the pressed position.

5. The rotary scram switch according to claim 4, characterized in that a flange (242) is provided on the outer periphery of the pressing piece (24) and a first stopper (286) is provided on the lower end of the sleeve (28), and after the movable shaft (20) is moved up to the initial position, the flange (242) abuts against the first stopper (286) so that the movable shaft (20) cannot be further moved up in the axial direction.

6. The rotary scram switch of claim 1, characterized in that the upper surface of the groove (142) has a guide portion (1422) directed to the radial inner side, and

the stopper (36) has an arcuate end surface on the radially outer side.

7. The rotary emergency stop switch according to claim 1, characterized in that the emergency stop head (10) is provided with an abutment (104) below it and the fixed seat (14) is provided with a second stop (144) at its upper end, the abutment (104) and the second stop (144) being able to abut with the movement and rotation of the emergency stop head (10) and the movable shaft (20) so as to achieve an axial limit of the movable shaft (20).

8. The rotary scram switch according to claim 1, characterized in that the lower part of the scram head (10) is provided with a barb (102) and the upper part of the movable shaft (20) is provided with a step (202) for engaging with the barb (102).

9. The rotary emergency stop switch according to claim 1, further comprising a waterproof ring (18) and a holder O-ring (16),

wherein the waterproof ring (18) is arranged at the joint surface of the movable shaft (20) and the fixed seat (14); and is

The fixing seat O-shaped ring (16) is arranged on the joint surface of the fixing seat (14) and the sleeve (28).

10. The rotary scram switch according to claim 4, characterized in that said upper bottom portion (204) of said movable shaft (20) is provided with a first fitting hole (210) and said sleeve (28) is internally provided with a second fitting hole (288),

wherein one end of the axial spring (22) is fitted into the first fitting hole (210), and the other end of the axial spring (22) is fitted into the second fitting hole (288); and is

When the movable shaft (20) is installed in the initial position of the sleeve (28), the axial spring (22) rotates by a first angle along a circumferential first direction, and the axial spring (22) applies torsion force to the movable shaft (20) along a circumferential second direction opposite to the circumferential first direction.

11. The rotary emergency stop switch according to claim 10, characterized in that the movable shaft (20) is provided at a lower end thereof with a first limit projection (206) and a second limit projection (208) which are diametrically opposed, and the sleeve (28) is provided at an inner diameter thereof with a first limit step (282) and a second limit step (284) which are diametrically opposed,

wherein, in the initial position, the first limit projection (206) abuts against the first limit step (282) to thereby limit the rotation of the movable shaft (20) in the circumferential second direction.

12. The rotary scram switch of claim 11, characterized in that said axial spring (22) is configured to provide an axially upward force to said movable shaft (20) when said scram head (10) is rotated in said circumferential first direction by said second angle such that said movable shaft (20) moves axially upward and applies a force to said movable shaft (20) rotating in said circumferential second direction.

13. The rotary scram switch according to any of claims 10-12, characterized in that the circumferential first direction is clockwise and the axial spring (22) is a left-handed spring, the first angle is 360 ° and the second angle is 60 °.

14. The rotary scram switch according to claim 1, characterized in that the scram head (10) is non-detachably mounted on top of the movable shaft (20).

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