CN210984631U - Elastic piece reset anti-rotation relay - Google Patents

Abstract

The utility model relates to the technical field of relays, in particular to a spring piece reset anti-rotation relay, which comprises an insulating shell, an electromagnet and two static terminals which are arranged on the insulating shell, a push rod component which is movably matched with the electromagnet, and a moving point block arranged on the push rod component; the push rod assembly further comprises a rod body, an armature and a first elastic sheet, the first elastic sheet is V-shaped, the first elastic sheet is provided with a first arm part and a second arm part which are arranged in a crossed mode, and the first arm part and the second arm part are both arranged on the insulating shell; utilize first shell fragment to replace the spring that is used for driving push rod assembly to reset among the prior art, first shell fragment can provide suitable elasticity that resets for moving point piece in very little space distance, reduces push rod assembly's height, and then reduces the height of whole relay for the relay accords with miniaturized specification requirement. First shell fragment sets up in insulating casing, prevents that the body of rod from driving some rotation of block and arousing to switch on badly, ensures the stability of relay performance.

Description

Elastic piece reset anti-rotation relay

Technical Field

The utility model relates to a relay technical field especially discloses a shell fragment resets and prevents rotating relay.

Background

The relay is the automatic switch commonly used among various circuit control, the structure of relay is various, prior art relay often disposes the push rod unit of activity and promotes the spring that the push rod unit resets, because the defect that spring self exists for the spring can not provide the elasticity that resets for the push rod unit in the very little space distance again, so, just need dispose great space distance for the spring, this has just led to the fact the increase of push rod unit height, has also brought the increase of whole relay height, causes the relay can not satisfy miniaturized specification requirement. In addition, because the spring does not have limiting displacement to the push rod unit, the push rod unit often can not realize normal switching on because of taking place to rotate, leads to the relay to use badly.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects and deficiencies in the prior art, the utility model aims to provide a spring piece reset rotation-proof relay, wherein a spring used for driving a push rod component to reset in the prior art is replaced by a first spring piece which can provide proper reset elasticity for a moving point block within a small space distance, so that the relay meets the requirement of miniaturization specification; the first elastic sheet prevents poor conduction caused by rotation of the rod body and the driving point block, and ensures the stability of the use performance of the relay.

In order to achieve the above object, the utility model discloses a spring piece reset anti-rotation relay, which comprises an insulating shell, an electromagnet and two static terminals arranged on the insulating shell, a push rod component movably matched with the electromagnet, and a moving point block arranged on the push rod component, wherein the electromagnet is used for driving the push rod component to move, and the moving point block is used for conducting the two static terminals; the push rod assembly further comprises a rod body, an armature and a first elastic piece, the armature, the moving point block and the first elastic piece are all arranged on the rod body, the first elastic piece is provided with a first arm portion and a second arm portion which are arranged in a crossed mode, and the first arm portion and the second arm portion are all arranged on the insulating shell.

Preferably, the first elastic piece is of an integral structure, the first elastic piece further includes a substrate, the first arm and the second arm are respectively disposed at two ends of the substrate, the substrate is disposed on the rod body, the moving point block is located between the substrate and the armature, the arm extends in a direction away from the substrate and in a direction away from the moving point block, a distance between ends of the first arm and the second arm, which are close to the substrate, is smaller than a distance between ends of the first arm and the second arm, which are away from the substrate, and one end of the arm, which is away from the substrate, is disposed on the insulating housing.

Preferably, the push rod assembly further includes a second elastic sheet, the moving point block is slidably disposed on the rod body, the second elastic sheet includes a third arm and a fourth arm that are disposed in a crossing manner, the third arm and the fourth arm respectively act on the rod body and the moving point block, the second elastic sheet is used for driving the moving point block to reset, and the first elastic sheet and the second elastic sheet are respectively located on two sides of the moving point block.

Preferably, the rod body is provided with a stop portion located between the armature and the moving point block, the free end of the third arm portion and the free end of the fourth arm portion are both provided with through holes, the rod body is accommodated in the through holes, and one side of the moving point block, which is close to the stop portion, is respectively stopped and abutted against the third arm portion and the fourth arm portion.

Preferably, the push rod assembly includes an insulator slidably disposed outside the rod body, the moving point block is disposed on the insulator, the insulator has two first locking ribs, and the free end of the third arm portion or the free end of the fourth arm portion is locked between the two first locking ribs.

Preferably, the insulating shell is provided with a plurality of second clamping ribs, and the free end of the first arm part and the free end of the second arm part are clamped between two adjacent second clamping ribs.

Preferably, the electromagnet comprises a yoke iron shell, an insulating framework and an iron core which are arranged in the yoke iron shell, an electromagnetic coil which is arranged outside the insulating framework in a winding mode, and a magnet ring which is arranged in the insulating framework, wherein the insulating shell is arranged in the yoke iron shell, the insulating framework is provided with a through hole which penetrates through the insulating framework, the iron core is arranged in one end of the through hole, the rod body and the iron core are arranged in a sliding mode, the armature is arranged in the through hole in a sliding mode, the magnet ring is arranged in the through hole, the magnet ring and the electromagnetic coil are arranged in a surrounding mode, and the magnetic field direction of the magnet ring is the same as or.

Preferably, the yoke iron shell comprises a yoke iron plate and a yoke iron piece connected with the yoke iron plate, the insulating framework and the insulating shell are respectively located on two sides of the yoke iron plate, the iron core is arranged on the yoke iron plate, the yoke iron plate is provided with a yoke iron cylinder extending into the through hole, the armature and the iron core are both located in the yoke iron cylinder, and the magnet ring is sleeved on the outer side of the yoke iron cylinder.

Preferably, the insulating framework is provided with a stop ring protruding into the through hole, the yoke piece is provided with a positioning cylinder protruding into the other end of the through hole, and the magnet ring is clamped between the stop ring and the positioning cylinder.

Preferably, the insulating cover is wrapped outside the insulating casing and the electromagnet, the insulating cover is exposed at one end of the static terminal, the insulating framework is provided with a protruding portion penetrating through the yoke iron casing, the protruding portion is provided with a power supply terminal which is conducted with the electromagnetic coil and exposes out of the insulating cover, the insulating casing is provided with a containing blind groove, the yoke iron casing covers an opening of the containing blind groove, and the other ends of the first elastic sheet, the moving point block, the second elastic sheet and the static terminal are located in the containing blind groove.

The utility model has the advantages that: utilize first shell fragment to replace the spring that is used for driving push rod assembly to reset among the prior art, first shell fragment can provide suitable elasticity that resets for moving point piece in very little space distance, reduces push rod assembly's height, and then reduces the height of whole relay for the relay accords with miniaturized specification requirement. First shell fragment sets up in insulating casing, prevents that the body of rod from driving some rotation of block and arousing to switch on badly, ensures the stability of relay performance.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the exploded structure of the present invention;

fig. 3 is a schematic perspective view of the push rod assembly of the present invention;

fig. 4 is an exploded view of the push rod assembly of the present invention;

FIG. 5 is an exploded view of the electromagnet and the push rod assembly of the present invention;

fig. 6 is a schematic perspective view of the insulating frame of the present invention.

The reference numerals include:

1-insulating shell 2-electromagnet 3-static terminal

4-moving point block 5-rod 6-armature

7-first elastic sheet 8-first arm 9-second arm

11-substrate 12-second elastic sheet 13-third arm part

14-fourth arm 15-stop 16-insulator

17-first snap rib 18-second snap rib 19-third snap rib

21-yoke shell 22-insulating framework 23-iron core

24-electromagnetic coil 25-magnet ring 26-through hole

27-yoke plate 28-yoke piece 29-yoke barrel

31-stop ring 32-positioning cylinder 33-insulating cover

34-accommodating the blind groove.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying drawings, which are not intended to limit the present invention.

Please refer to fig. 1 to 6, the utility model discloses a shell fragment resets and prevents rotating relay, including insulating casing 1, installation setting electromagnet 2 and two quiet terminals 3 on insulating casing 1, with 2 clearance fit's of electromagnet push rod assembly, push rod assembly be equipped with moving point piece 4, electromagnet 2 is used for driving push rod assembly to remove, moving point piece 4 is used for switching on two quiet terminals 3, moving point piece 4 adopts conductive metal to make, moving point piece 4 is roughly the rectangle flat board.

The push rod assembly further comprises a rod body 5, an armature 6 and a first elastic sheet 7, the rod body 5 is a substantially straight strip-shaped cylinder, the armature 6, a moving point block 4 and the first elastic sheet 7 are all arranged on the rod body 5, the armature 6 and the first elastic sheet 7 are respectively arranged at the left end and the right end of the rod body 5, the moving point block 4 is located between the armature 6 and the first elastic sheet 7, the first elastic sheet 7 is substantially V-shaped, the first elastic sheet 7 is provided with a first arm portion 8 and a second arm portion 9 which are arranged in a crossed mode, the first arm portion 8 and the second arm portion 9 are substantially rectangular flat plates, and the free end of the first arm portion 8 and the free end of the second arm portion 9 are both arranged on the insulating shell 1.

Utilize first shell fragment 7 to replace the spring that is used for driving push rod assembly reset among the prior art, first shell fragment 7 can provide suitable elasticity that resets for moving point piece 4 in very little space distance, reduces push rod assembly's height, and then reduces the height of whole relay for the relay accords with miniaturized specification requirement. The arm of the first elastic sheet 7 is arranged on the insulating shell 1, the insulating shell 1 is used for limiting the first elastic sheet 7, poor conduction caused by rotation of the rod body 5 and the driving point block 4 is prevented, and the stability of the use performance of the relay is ensured.

The first elastic sheet 7 is of an integrated structure, the first elastic sheet 7 is formed by punching and bending a metal material, the first elastic sheet 7 further comprises a substrate 11, a first arm portion 8 and a second arm portion 9 are respectively arranged at the left end and the right end of the substrate 11, the substrate 11 is fixedly arranged on the rod body 5, the moving point block 4 is located between the substrate 11 and the armature 6, the arm portions extend towards the direction far away from the substrate 11 and the direction far away from the moving point block 4, the distance between the ends, close to the substrate 11, of the first arm portion 8 and the second arm portion 9 is smaller than the distance between the ends, far away from the substrate 11, of the first arm portion 8 and the second arm portion 9, and the end, far away from the substrate 11, of the arm portion is.

The electromagnet 2 generates magnetic force after being electrified, the armature 6 is attracted by the magnetic force to enable the armature 6 to drive the rod body 5 to move, the moving rod body 5 drives the moving point block 4 to move together, and therefore the moving point block 4 is enabled to conduct the two static terminals 3. In the process that the rod body 5 moves, the rod body 5 extrudes the first elastic sheet 7 to enable the first elastic sheet 7 to be elastically deformed and have elastic potential energy, after the electromagnet 2 loses power, the electromagnet 2 loses magnetic force, and the first elastic sheet 7 drives the push rod assembly to recover the original position under the action of self elastic restoring force.

The push rod assembly further comprises a second elastic sheet 12, the moving point block 4 is arranged on the rod body 5 in a sliding mode, the rod body 5 penetrates through the moving point block 4, the second elastic sheet 12 is approximately V-shaped, the second elastic sheet 12 comprises a third arm portion 13 and a fourth arm portion 14 which are arranged in a crossed mode, the third arm portion 13 and the fourth arm portion 14 act on the rod body 5 and the moving point block 4 respectively, the second elastic sheet 12 is used for driving the moving point block 4 to reset, and the first elastic sheet 7 and the second elastic sheet 12 are located on the left side and the right side of the moving point block 4 respectively. The second elastic sheet 12 is also of an integral structure, the second elastic sheet 12 is formed by punching and bending a metal material, and one end of the third arm 13 is directly connected with one end of the fourth arm 14.

When the magnetic force of the electromagnet 2 drives the armature 6 to enable the moving point block 4 to be switched on two static terminals 3, the moving point block 4 slides relative to the rod body 5, the moving point block 4 which slides relative to the rod body 5 extrudes the second elastic sheet 12 to enable the second elastic sheet 12 to generate elastic deformation and have elastic potential energy, the elastic restoring force of the second elastic sheet 12 drives the moving point block 4 to be stably pressed and abutted on the static terminals 3, and the situation that the relay is vibrated to cause the moving point block 4 to be separated from the static terminals 3 is avoided. When the magnetic force of the electromagnet 2 disappears, the second elastic sheet 12 drives the moving point block 4 to restore the original position under the action of the elastic force.

Utilize second shell fragment 12 to replace the spring that is used for driving among the prior art to move some 4 resets, compare in the spring that drives among the prior art and move some 4 resets, second shell fragment 12 can be in very little space distance for moving some 4 provides suitable elasticity that resets, further reduces push rod assembly's height to supplementary height that reduces whole relay makes the relay accord with miniaturized specification requirement.

The rod body 5 is provided with a stop part 15 positioned between the armature 6 and the moving point block 4, the stop part 15 is arranged around the central axis of the rod body 5, the free end of the third arm part 13 and the free end of the fourth arm part 14 are both provided with through holes, the through holes penetrate through the third arm part 13 and the fourth arm part 14, the rod body 5 is accommodated in the through holes, and the sides, close to each other, of the moving point block 4 and the stop part 15 are respectively stopped and abutted against the third arm part 13 and the fourth arm part 14.

In the assembling process of the second elastic sheet 12 and the rod body 5, the third arm part 13 and the rod body 5 are not required to be fixedly connected, and meanwhile, the fourth arm part 14 and the rod body 5 (or the moving point block 4) are not required to be fixedly connected, so that the disassembling efficiency between the second elastic sheet 12 and the rod body 5 is greatly improved.

The push rod assembly comprises an insulator 16 arranged outside the rod body 5 in a sliding mode, the insulator 16 is made of insulating plastics, the moving point block 4 is arranged on the insulator 16, preferably, the moving point block 4 and the insulator 16 are embedded and molded together, the insulator 16 and the moving point block 4 are ensured to be stably connected together, and the situation that the use performance of the relay is affected due to the fact that relative movement occurs between the moving point block 4 and the insulator 16 is avoided. The insulator 16 is provided with two first catching ribs 17, the two first catching ribs 17 are spaced apart from each other and arranged in parallel, and the free end of the third arm portion 13 or the free end of the fourth arm portion 14 is caught between the two first catching ribs 17. The two first ribs 17 are used to stop and limit the third arm 13 or the fourth arm 14, so as to prevent the second elastic piece 12 from rotating relative to the rod 5.

The insulating housing 1 is provided with a plurality of second snap ribs 18, and the free end of the first arm portion 8 and the free end of the second arm portion 9 are clamped between two adjacent second snap ribs 18. In the present embodiment, the number of the second catching ribs 18 is four, the free end of the first arm portion 8 is caught between two second catching ribs 18, and the free end of the second arm portion 9 is caught between the other two second catching ribs 18. The first arm portion 8 and the second arm portion 9 are stopped and limited by two adjacent second clamping ribs 18, so that the first elastic sheet 7 is prevented from rotating relative to the insulating shell 1, and the rod body 5 is prevented from rotating relative to the insulating shell 1.

The insulator 16 is provided with two third snap ribs 19, the first snap rib 17 and the third snap rib 19 are respectively located on two sides of the insulator 16 away from each other, the substrate 11 is clamped between the two third snap ribs 19, and the two third snap ribs 19 are used for stopping and limiting the substrate 11, so that the insulator 16 is ensured not to rotate relative to the rod body 5.

The electromagnet 2 comprises a yoke iron shell 21, an insulating framework 22 and an iron core 23 which are arranged in the yoke iron shell 21, an electromagnetic coil 24 which is wound outside the insulating framework 22, and a magnet ring 25 which is positioned in the insulating framework 22, the insulating shell 1 is arranged on the outer side of the yoke iron shell 21, the insulating framework 22 is provided with a through hole 26 penetrating through the insulating framework 22, the iron core 23 is positioned in one end of the through hole 26, the rod body 5 and the iron core 23 are arranged in a sliding mode, one end, far away from the first elastic sheet 7, of the rod body 5 penetrates through the iron core 23, the armature 6 and the blocking portion 15 are respectively positioned on the left side and the right side of the iron core 23, the armature 6 is arranged in the through hole 26 in a sliding mode, the magnet ring 25 is positioned in the through hole 26, the magnet ring 25 is made of a permanent magnet, the magnet ring 25 is approximately annular, the magnet ring 25 and the electromagnetic coil 24 are arranged around the armature 6, and the direction of a magnetic field of.

In the using process of the relay, forward current is conducted to the electromagnetic coil 24, the magnetic field of the magnet ring 25 is superposed with the magnetic field generated after the electromagnetic coil 24 is electrified, and the attraction capacity of the coil is improved, so that the iron core 23 has large magnetic force to drive the armature 6 to move, compared with the situation that the electromagnetic coil 24 is used alone, the power of the electromagnetic coil 24 is reduced, and the electromagnetic coil 24 is prevented from being burnt out due to high-power heating; the low-power electromagnetic coil 24 reduces the volume of the coil, so that the volume of the electromagnet 2 is reduced, and further the volume of the whole relay is reduced, and the relay meets the requirement of miniaturization specification. When reverse current is conducted to the electromagnetic coil 24, the magnetic field of the magnet ring 25 is offset with the magnetic field generated after the electromagnetic coil 24 is electrified, the push rod assembly can be easily driven to reset by the first elastic sheet 7, and the magnetic interference of the magnet ring 25 on the normal reset of the push rod assembly is avoided.

The yoke iron shell 21 comprises a yoke iron plate 27 and a yoke iron piece 28 connected with the yoke iron plate 27, the yoke iron plate 27 is a substantially rectangular flat plate, the yoke iron piece 28 is U-shaped, the insulating framework 22 and the insulating shell 1 are respectively positioned on the left side and the right side of the yoke iron plate 27, the iron core 23 is arranged on the yoke iron plate 27, the yoke iron plate 27 is provided with a yoke iron cylinder 29 extending into the through hole 26, the yoke iron cylinder 29 is a substantially hollow cylinder, the armature 6 and the iron core 23 are both positioned in the yoke iron cylinder 29, and the magnet ring 25 is sleeved on the outer side of the yoke iron cylinder 29. The yoke cylinder 29 limits the position of the magnet ring 25, and prevents the magnet ring 25 from moving in the radial direction of the through hole 26 and causing a defective use.

The insulating framework 22 is provided with a stop ring 31 protruding into the through hole 26, the stop ring 31 is formed by protruding from the inner hole wall of the through hole 26, the yoke piece 28 is provided with a positioning tube 32 protruding into the other end of the through hole 26, the positioning tube 32 is substantially hollow cylindrical, the positioning tube 32 is sleeved outside the yoke tube 29, and the magnet ring 25 is clamped between the stop ring 31 and the positioning tube 32. By the cooperation of the positioning cylinder 32 and the stopper ring 31, the magnet ring 25 is prevented from moving in the axial direction of the through hole 26, and the magnet ring 25 is prevented from being used badly due to a change in position.

The electromagnetic coil is characterized by further comprising an insulating cover 33 coated on the outer sides of the insulating shell 1 and the electromagnet 2, the insulating cover 33 is made of insulating plastics, the insulating cover 33 is exposed out of one end of the static terminal 3, a protruding portion penetrating through the yoke iron shell 21 is arranged on the insulating framework 22, a power supply terminal which is conducted with the electromagnetic coil 24 and is exposed out of the insulating cover 33 is installed on the protruding portion, and an external power supply supplies power to the electromagnetic coil 24 through the power supply terminal.

Insulating casing 1 adopts ceramic material to make, is provided with the blind groove 34 of holding on the insulating casing 1, and yoke iron shell 21 is used for hiding the opening of the blind groove 34 of holding, and first shell fragment 7, move some 4, second shell fragment 12, the other end of quiet terminal 3 all is located the blind groove 34 of holding, utilizes insulating casing 1 to protect first shell fragment 7, move some 4, second shell fragment 12, quiet terminal 3, avoids external article to disturb the normal use of push rod subassembly and quiet terminal 3.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims (10)

1. A spring piece reset anti-rotation relay comprises an insulating shell, an electromagnet and two static terminals, a push rod assembly and a moving point block, wherein the electromagnet and the two static terminals are arranged on the insulating shell; the method is characterized in that: the push rod assembly further comprises a rod body, an armature and a first elastic piece, the armature, the moving point block and the first elastic piece are all arranged on the rod body, the first elastic piece is provided with a first arm portion and a second arm portion which are arranged in a crossed mode, and the first arm portion and the second arm portion are all arranged on the insulating shell.

2. The spring plate reset anti-rotation relay according to claim 1, characterized in that: the first elastic piece is of an integrated structure, the first elastic piece further comprises a substrate, a first arm and a second arm are arranged at two ends of the substrate respectively, the substrate is arranged on the rod body, the moving point block is located between the substrate and the armature, the arm extends towards the direction far away from the substrate and the direction far away from the moving point block, the distance between the ends, close to the substrate, of the first arm and the second arm is smaller than the distance between the ends, far away from the substrate, of the first arm and the second arm, and one end, far away from the substrate, of the arm is arranged on the insulating shell.

3. The spring plate reset anti-rotation relay according to claim 1, characterized in that: the push rod assembly further comprises a second elastic sheet, the moving point block is arranged on the rod body in a sliding mode, the second elastic sheet comprises a third arm and a fourth arm which are arranged in a crossed mode, the third arm and the fourth arm act on the rod body and the moving point block respectively, the second elastic sheet is used for driving the moving point block to reset, and the first elastic sheet and the second elastic sheet are located on two sides of the moving point block respectively.

4. The spring plate reset anti-rotation relay according to claim 3, characterized in that: the rod body is provided with a stop part positioned between the armature and the moving point block, the free end of the third arm part and the free end of the fourth arm part are both provided with through holes, the rod body is accommodated in the through holes, and one side of the moving point block, which is close to the stop part, is respectively stopped and abutted against the third arm part and the fourth arm part.

5. The spring plate reset anti-rotation relay according to claim 3, characterized in that: the push rod assembly comprises an insulator which is arranged on the outer side of the rod body in a sliding mode, the moving point block is arranged on the insulator, the insulator is provided with two first clamping ribs, and the free end of the third arm portion or the free end of the fourth arm portion is clamped between the two first clamping ribs.

6. The spring plate reset anti-rotation relay according to claim 1, characterized in that: the insulating shell is provided with a plurality of second clamping ribs, and the free end of the first arm part and the free end of the second arm part are clamped between two adjacent second clamping ribs.

7. The spring plate reset anti-rotation relay according to claim 1, characterized in that: the electro-magnet includes the yoke iron shell, set up insulating skeleton and iron core in the yoke iron shell, around locating the solenoid in the insulating skeleton outside, be located the magnet circle of insulating skeleton, the insulating shell sets up in the yoke iron shell, insulating skeleton is equipped with the through-hole that runs through insulating skeleton, the iron core is located the one end of through-hole, the body of rod slides with the iron core and sets up, armature slides and holds and establishes in the through-hole, the magnet circle is located the through-hole, magnet circle, solenoid all encircle the armature setting, the magnetic field direction that produces after the magnetic field direction of magnet circle and solenoid circular telegram syntropy or reverse.

8. The spring plate reset anti-rotation relay according to claim 7, characterized in that: the yoke iron shell comprises a yoke iron plate and a yoke iron piece connected with the yoke iron plate, the insulating framework and the insulating shell are respectively positioned on two sides of the yoke iron plate, the iron core is arranged on the yoke iron plate, the yoke iron plate is provided with a yoke iron cylinder extending into the through hole, the armature iron and the iron core are both positioned in the yoke iron cylinder, and the magnet ring is sleeved on the outer side of the yoke iron cylinder.

9. The spring plate reset anti-rotation relay according to claim 8, characterized in that: the insulating framework is provided with a stop ring protruding into the through hole, the yoke piece is provided with a positioning barrel protruding into the other end of the through hole, and the magnet ring is clamped between the stop ring and the positioning barrel.

10. The spring plate reset anti-rotation relay according to claim 7, characterized in that: still including the insulating boot in the insulating casing and the electro-magnet outside of cladding, the insulating boot appears out at the one end of quiet terminal, and insulating skeleton is equipped with the protruding portion that runs through the yoke iron shell, and the protruding portion is equipped with and switches on and show the power supply terminal of insulating boot with solenoid, and the insulating casing is equipped with the blind groove of holding, and the yoke iron shell covers the opening in the blind groove of holding, and the other end of first shell fragment, movable point piece, second shell fragment, quiet terminal all is located the blind groove of holding.

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