TWM625286U - Single axis hinge structure - Google Patents

Abstract

The present invention is a single-axis hinge structure, which includes a pivot, one end of the pivot has a first connecting portion, the other end of the pivot has a cylindrical portion and a positioning rod portion; one end of a bracket has a second connecting portion, and the other end of the bracket has a second connecting portion. The connecting plate and a first concave cam are respectively pivotally connected to the cylindrical portion. One side of the first concave cam is provided with a set of symmetrical ascending portions. The ascending portion includes a trapezoidal groove. The trapezoidal groove has a first inclined portion. A sloping part, a flat part and a second sloping part respectively extend in sequence in the axial direction of the pivot, the other side of the first concave cam is connected to the connecting plate; a second concave cam is sleeved on the positioning rod part to be connected with the pivot Synchronous rotation, one side surface of the second concave cam is provided with a set of raised portions to press each trapezoidal groove correspondingly; and a twist positioning unit is sleeved on the positioning rod portion of the pivot to press against the second concave cam.

Description

Single axis pivot structure

This work is related to a hinge structure, especially a single-axis hinge structure of a thin and foldable electronic device.

Traditional foldable electronic devices, such as the display and base of a notebook computer, are mainly connected to the side of the display and the base through a single-axis or double-axis hinge to form a pivot, so that the display can be flipped up or closed relative to the base for adjustment. The tilt angle of the monitor relative to the base.

Among them, as shown in the patent case of "Covered Rotating Shaft Structure with Automatic Locking" No. CN101469739U, the basic components of the uniaxial covering hinge mainly include a pivot shaft 2 and a covering member 1, and the covering member 1 is After stamping and manufacturing the round-coated iron sheet, after the stamped and bent coated end 11 wraps the first shaft section 21 of the pivot shaft 2, one body (screen) can be opposite to another body (base or another screen) When rotating, it forms a frictional torsion force of “light on and off”; and the uniaxial covered hinge also includes a cam member 3, at least one elastic body 4 and a nut 5 and other basic components, wherein the cam member 3 contains as a concave and convex. A fixed piece 31 and a rotating piece 32 that rotate in opposite directions. The rotating piece 32 rotates in the forward direction with the pivot 2 (the matching covering end forms a light-opening function) and reversely rotates (the matching covering end forms a critical function) ), and can produce an automatic locking function when it is turned to the locking position, and the fixing member 31 is fixed on one side of the covering end 11, so as to reduce the flexibility of the punched covering member, which is reduced when the rotation is light. The case where the body (screen) is shaking.

The above-mentioned rotating shaft structure is mainly through the mutual pressing of the positioning groove of the cam member and the positioning block, that is, the mutual pressing of a group of corresponding inclined surfaces of a pair of concave cams. During the process, the variation range of the generated friction torque value is larger. However, in actual operation, for today's thin and foldable electronic devices, when a body such as a screen is opened and another body such as a base or a screen is relatively unfolded during the initial process, the other body is prone to friction due to friction. If the torque is too large, it is lifted, but if the friction torque is weakened, there is no traditional buckle structure (hook or magnetic suction) when the two bodies are closed. During the carrying process, the weakened frictional torsion is not easy to resist the influence of gravity, and the two bodies in the upright and closed state will slightly expand. On the other hand, when the cam members are only pressed against each other by the corresponding inclined planes, and then turned into mutual friction on the opposite side planes, due to the sudden change of the torsion force, coupled with the influence of the flexibility of the round iron sheet (cladding piece), It will make the user feel abrupt when lifting or closing, that is, it is easy to feel sudden torque. The traditional stamping and bending technology requires a larger width and thickness of the iron sheet to generate sufficient strength after the iron sheet is bent. However, when the width of the iron sheet is too wide, the length and thickness of the cladding part increase simultaneously. At the same time, the combined volume occupied by the pivot will increase, and it is difficult to achieve the requirement of thinning the overall structure.

In view of this, in order to provide a structure that is different from the conventional technology, it can retain the functions of light and heavy on and off, automatic locking, and reduce screen shaking, and improve the above shortcomings, further reduce parts and assembly processes, and in order to stabilize Torque is accumulated or decreased, the creators have accumulated many years of experience and continuous research and development improvement, so this creation came into being.

One of the objectives of the present invention is to provide a single-shaft hinge structure, so as to solve the situation that the common operation of the conventional rotating shaft structure with a set of concave cam sets with corresponding inclined surfaces will cause sudden changes in torsional force and it is not easy to stabilize, and because the wrapped mandrel is not easy to stabilize. If the width of the iron sheet is too wide and the thickness is increased, the length of the cladding element will be increased and thickened simultaneously, and the problem of the overall volume occupied by the pivot shaft will be increased. The structure is coaxially pivoted on the cylindrical portion of a pivot shaft, and is pressed against a set of gradually rising portions on one side of the first concave cam and a set of raised portions on one side of the second concave cam, there are Helps to stabilize the accumulation and decrease of torque, so that the screen can maintain the stability of rotation, and can freely stagnate at a certain rotation angle. It can also easily adjust the torque to overcome the problems of initial opening and closing of thin foldable electronic devices. It is convenient for users to open, close and carry with one hand, further reduce parts and assembly processes, and reduce the overall volume to meet the needs of thinning.

In order to achieve the purpose of the above creation, the single-axis hinge structure provided in this creation includes a pivot shaft, a bracket, a first concave cam, a second concave cam and a torsional positioning unit. One end of the pivot shaft has a first connecting portion to connect with a body, the other end of the pivot shaft has a cylindrical portion extending axially and a positioning rod portion; one end of the bracket has a second connecting portion to connect to another body, The other end of the bracket is provided with a connecting plate, the connecting plate has a pivot hole to pivot the cylindrical portion of the pivot shaft; the first concave cam is pivotally connected to the cylindrical portion of the pivot shaft, and one side of the first concave cam has a set of symmetrical gradually rising Each of the ascending parts includes a trapezoidal groove, a flat part and a second inclined part, the trapezoidal groove has a first inclined part, and the first inclined part, the flat part and the second inclined part are in accordance with the axis direction of the pivot. The other side of the first concave cam is connected to the connecting plate; the second concave cam is sleeved on the positioning rod to rotate synchronously with the pivot, and one side of the second concave cam has a set of symmetrical convex parts, The set of protruding portions presses correspondingly to each trapezoidal groove of the set of gradually rising portions; and the twist positioning unit is sleeved on the positioning rod portion of the pivot, so as to press against the second concave cam to press the first concave cam.

During implementation, the peripheral edge of the cylindrical portion further has an outer ring portion, and the outer ring portion has a first stop portion and a second stop portion; a side surface of the connecting plate of the bracket has a protrusion, so as to connect the first connection portion When rotating relative to the second connecting portion, the two sides of the protruding block are respectively pressed against the first blocking portion and the second blocking portion to limit the position between a rotation angle.

In implementation, the outer ring portion includes a radially outwardly convex sector block, the first stop portion is one end face of the sector block, and the second stop portion is the other end face of the sector block.

During implementation, a positioning hole is formed on the plate surface of the connecting plate, the other side of the first concave cam has an axially extending engaging portion, and the engaging portion passes through the positioning hole to connect the connecting plate.

During implementation, the engaging portion includes a segment portion and the protruding block, the segment portion is accommodated and positioned in the positioning hole of the connecting plate, and the protruding block protrudes outward from one side of the connecting plate.

During implementation, the side surface of the connecting plate is pressed against the side surface of the outer ring portion, and the side surface of the connecting plate is provided with a plurality of oil storage grooves arranged in an annular array.

During implementation, the peripheral edge of the cylindrical portion of the pivot shaft further has at least one helical groove surrounding in the axial direction; the first concave cam is a sleeve with an axial gap, and the outer peripheral edge of the first concave cam has a radial outward convexity and is axially convex. A fan-shaped straight plate is extended, one end of the fan-shaped straight plate has an engaging portion, and the other end of the fan-shaped straight plate has the flat portion.

During implementation, the first concave cam is a sleeve with an axial gap, the inner periphery of the first concave cam has at least one straight oil storage groove extending axially, the at least one straight oil storage groove and the axial gap are parallel to each other, and At least one straight oil storage groove is annularly distributed on the outer periphery of the cylindrical portion of the pivot shaft.

When implemented, the trapezoidal groove of the first concave cam further includes a bearing surface; the group of convex parts of the second concave cam are respectively trapezoidal blocks, and the convex part has a top surface, a pressing surface and an abutting surface; When the first concave cam and the second concave cam are in the closed state, the set of raised parts are respectively accommodated in the set of trapezoidal grooves of the set of gradually rising parts, and the pressing surfaces of the set of raised parts press against the set of raised parts respectively The set of first inclined surfaces of the trapezoidal grooves, and the set of abutting surfaces of the set of protruding parts respectively press against the set of bearing surfaces of the set of trapezoidal grooves.

When implemented, the twist positioning unit includes at least one elastic piece and a cap coaxially positioned on the positioning rod, so that the at least one elastic piece presses against the second concave cam to press the first concave cam.

In order to facilitate a deeper understanding of this creation, it is detailed below:

Please refer to FIG. 1 to FIG. 4 , which are a preferred embodiment of the uniaxial hinge structure 1 , which mainly includes a pivot 2 , a bracket 3 , a first concave cam 4 , a second concave cam 5 and A twist positioning unit 6, one end of the pivot 2 has a long plate, the long plate is used as a first connecting part 21, the first connecting part 21 is locked and connected to the body such as a screen; one end of the bracket 3 has two mutual The locked bending pieces (31, 32), the two bending pieces (31, 32) are combined to form a second connecting portion 33, and the second connecting portion 33 is locked and connected to another body such as a base or a screen.

The other end of the pivot shaft 2 has a cylindrical portion 22, a positioning rod portion 23 and an outer ring portion 24, wherein the cylindrical portion 22 and the positioning rod portion 23 are axially extended in a direction away from the first connecting portion 21, And have different shaft diameters. The cylindrical portion 22 is a cylindrical body, and the outer periphery of the cylindrical portion 22 has an axially surrounding spiral groove 221 to guide the lubricating oil. During implementation, the number of the spiral groove 221 is at least one. The positioning rod portion 23 is a non-cylindrical body with two parallel surfaces, and one end of the positioning rod portion 23 is provided with an external thread; and the outer ring portion 24 is an annular plate protruding radially outward from the outer periphery of the cylindrical portion 22. The outer ring portion 24 A sector-shaped block 25 is formed on the outer layer. One end surface of the sector-shaped block 25 serves as the first stopper portion 251 , and the other end surface of the sector-shaped block 25 serves as the second stopper portion 252 .

The other end of the bracket 3 has an elongated plate, and the elongated plate serves as the connecting plate 34 . An end plate of the connecting plate 34 has a pivot hole 341 and a positioning hole 342. The cylindrical portion 22 of the pivot shaft 2 is positioned in the pivot hole 341, so that the pivot shaft 2 and the connecting plate 34 are pivotally connected to each other; There are a plurality of oil storage grooves 343 arranged in an annular array on the side surface, so that a side surface of the connecting plate 34 presses a side surface of the outer ring portion 24, and the oil storage grooves 343 lubricating oil. The positioning hole 342 is a fan-shaped through hole passing through the surface of the connecting plate 34 , and the positioning hole 342 is located between the pivot hole 341 and the second connecting portion 33 .

The first concave cam 4 is manufactured by metal injection molding (MIM) technology, so as to make a small-sized product. The first concave cam 4 is a sleeve with an axial notch 45. The inner periphery of the first concave cam 4 has three straight oil storage grooves 41 extending axially. The three straight oil storage grooves 41 and the axial gap 45 are parallel to each other and It is annularly distributed on the outer periphery of the cylindrical portion 22 of the pivot shaft 2. During implementation, the oil storage straight grooves 41 can also be of other numbers, so that when the first concave cam 4 is pivotally connected to the cylindrical portion 22 of the pivot shaft 2, it can match the cylindrical portion 22 of the pivot shaft 2. The spiral groove 221 on the outer periphery of the part 22 allows the lubricating oil to be evenly distributed.

One side surface of the first concave cam 4 has two (a set) of relatively symmetrical ascending portions 42 , any ascending portion 42 includes a trapezoidal groove 421 , a flat portion 422 and a second inclined portion 423 , among which The trapezoidal groove 421 mainly includes a first inclined surface portion 424 and a bearing surface portion 425. The first inclined surface portion 424, the flat surface portion 422 and the second inclined surface portion 423 extend outward in sequence along the axis direction of the pivot shaft 2, thereby forming two stages. The climbing slope. The outer periphery of the first concave cam 4 has a radially outwardly convex and axially extending fan-shaped straight plate 43. One end of the fan-shaped straight plate 43, that is, the other side of the first concave cam 4, has an engaging portion 44. 44 includes a segment portion 441 and a protruding block 442 , and the other end of the straight fan-shaped plate 43 has one of the plane portions 422 of the group of plane portions 422 . The axial notch 45 penetrates the outer periphery of the first concave cam 4 and is located on one side of the straight fan-shaped plate 43 , and the axial notch 45 separates the flat portion 422 of the ascending portion 42 from the adjacent second inclined portion 423 . After the engaging portion 44 passes through the positioning hole 342 of the connecting plate 34 , the segment portion 441 is accommodated and positioned in the positioning hole 342 , so that the other side of the first concave cam 4 and the connecting plate 34 are firmly connected to each other, and the convex block 442 Then, it protrudes outward from one side of the connecting plate 34 and is located between the first stop portion 251 and the second stop portion 252 of the sector block 25 . In this way, when the first connecting portion 21 rotates relative to the second connecting portion 33, the two sides of the protruding block 442 can be pressed against the first blocking portion 251 and the second blocking portion 252 respectively, so as to limit the position on the between rotation angles. When applied to a foldable electronic device such as a traditional laptop or a dual-screen laptop, the two bodies of the foldable electronic device can be closed to each other to form a stopper in the closed state and press against one side of the bump 442 When the second stopper portion 252 is formed, a stopper is formed after the two bodies are relatively unfolded to the maximum opening angle.

The second concave cam 5 is a ring, and the second concave cam 5 is sleeved with the positioning rod 23 of the pivot shaft 2 , so that the second concave cam 5 and the pivot shaft 2 can rotate synchronously. One side surface of the second concave cam 5 has two (a set) of symmetrical raised portions 51. The two raised portions 51 are respectively trapezoidal blocks and have a top surface 52, a pressing surface 53 and a Abutment surface 54 . When a body such as a screen is in a covered state with another body such as a base or a screen, the two protruding parts 51 are respectively accommodated in the trapezoidal grooves 421 of the two gradually rising parts 42, and the two protruding parts 51 are respectively accommodated in the trapezoidal grooves 421 of the two rising parts 42, The pressing surfaces 53 of the rising portion 51 press against the first inclined surfaces 424 of the two trapezoidal grooves 421 respectively, and the abutting surfaces 54 of the two convex portions 51 press against the bearing surfaces 425 of the two trapezoidal grooves 421 respectively.

The torsional positioning unit 6 includes at least one elastic piece 61 and a cap 62 . During implementation, the plurality of elastic pieces 61 are coaxially positioned on the positioning rod portion 23 of the pivot shaft 2 . The plurality of elastic pieces 61 can be elastically deformed to press against the other side of the second concave cam 5 by screwing the positioning rod 23 of the cap 62, and the second concave cam 5 can be pressed against the first concave cam 4. The first concave cam 4 can actually cover the cylindrical portion 22 of the pivot shaft 2, so that the manufacturing tolerance and the flexibility of the round iron sheet (covering piece) can be reduced more than the conventional stamping cover etc. influence.

Please refer to FIG. 5 , when a body such as a screen is opened to be unfolded relative to another body such as a base or a screen, the pressing surfaces 53 of the two protruding portions 51 of the second concave cam 5 pass through each other. The relative movement with each of the first inclined parts 424 of the two trapezoidal grooves 421 of the first concave cam 4 can easily enter the first climbing stage, so that the second concave cam 5 and the first concave cam 4 begin to push away from each other .

As shown in FIG. 6 , when the body continues to unfold, the top surfaces 52 of the two convex portions 51 of the second concave cam 5 and the two flat portions 422 of the first concave cam 4 are in contact with each other respectively, which will enter the In the plane rotation friction stage, the second concave cam 5 and the first concave cam 4 are kept at a fixed distance. As shown in FIG. 7 to FIG. 9 , when the body is further unfolded, through the relative movement of the two convex parts 51 of the second concave cam 5 and the two second inclined parts 423 of the first concave cam 4 respectively, then It is easy to enter the second climbing stage, and let the second concave cam 5 and the first concave cam 4 continue to push away from each other. One side is adjacent to the axial notch 45 and continues to rotate and rub until the side of the protrusion 442 of the first concave cam 4 presses against the second stopper 252 , so that the body can stop at the maximum opening angle. In this way, the variation of the torsional force between the first concave cam 4 and the cylindrical portion 22 can be alleviated, and the first concave cam 4 can be prevented from being easily unscrewed and the torsional force is suddenly weakened and the function of effectively supporting the screen is lost.

To sum up, the first concave cam of this creation is manufactured by metal injection molding technology, so it can be made into a small-sized product. The overall volume is reduced to meet the requirement of thinning; and through the corresponding pressing between a group of gradually rising parts on one side of the first concave cam and a group of raised parts on one side of the second concave cam, it can be When a body and another body are relatively unfolded, in the process of relative rotation of the two concave cams, two climbing stages are formed, so as to reduce the abrupt hand feeling (operating hand feeling) caused by only one climbing stage of the traditional concave cam group. If the torque changes suddenly become lighter or heavier), the torque value during the initial rotation can be limited within the preset tolerance range, that is, the torque can be easily adjusted to overcome the initial rotation of the thin foldable electronic device. The problem caused by opening and closing the carrying; in the subsequent rotation, it can stably control the change of the axial notch of the first concave cam, and can also slow down the sudden change of the rotating torque, so that the overall torque change can be regulated at a certain level. Within the range of values, the screen can achieve a better free stagnation effect and maintain the stability of the rotation. Furthermore, since the other side of the first concave cam in this case has an engaging portion, after the engaging portion passes through the positioning hole of the connecting plate, the first concave cam and the connecting plate can be stably connected to each other, and the convex block can be stably connected to each other. One side of the connecting plate protrudes outward to produce a stopper effect. In this way, it can replace the traditional stopper made by stamping, so that the surface of the connecting plate has a flatness and can be in contact with the adjacent components. In addition, the structural design of the concave cam in this case can also reduce the impact caused by manufacturing tolerances compared to the traditional stamping and the traditional cam components.

Although this creation discloses preferred specific embodiments to achieve the above-mentioned purpose, it is not intended to limit the structural features of this creation. Variations or modifications thereof are possible and are all covered by the scope of the patent application for this creation.

1: Single axis hub structure 2: Pivot 21: The first connection part 22: Cylindrical part 221: Spiral groove 23: Positioning rod 24: Outer ring 25: Sector block 251: The first stop 252: Second stop 3: Bracket 31, 32: Bend sheet 33: Second connecting part 34: Link Board 341: Pivot hole 342: Positioning hole 343: Oil storage groove 4: The first concave cam 41: oil storage straight groove 42: Ascension 421: Trapezoidal slot 422: Plane 423: Second bevel 424: First bevel 425: leaning on the face 43: Scalloped straight plate 44: Engagement part 441: Section Department 442: bump 45: Axial Notch 5: The second concave cam 51: Raised part 52: top surface 53: Pressing surface 54: Abutment surface 6: Twist positioning unit 61: elastic sheet 62: cap

﹝ FIG. 1 ﹞ is an exploded view of the preferred embodiment of this creation. ﹝ FIG. 2 ﹞ is a three-dimensional appearance schematic diagram of a preferred embodiment of this creation. ﹝Figure 3﹞ is a schematic diagram of the three-dimensional appearance of the first concave cam and the second concave cam of this creation. ﹝ FIG. 4 ﹞ is a schematic cross-sectional view of the preferred embodiment of this creation. ﹝ FIG. 5 ﹞ is a schematic diagram of the use state of the preferred embodiment of this creation entering the first climbing stage. ﹝ FIG. 6 ﹞ is a schematic diagram of the use state of the preferred embodiment of this creation entering the stage of plane rotation and friction. ﹝ FIG. 7 ﹞ is a schematic diagram of the use state of the preferred embodiment of this creation entering the second climbing stage. ﹝Figure 8﹞ is a schematic cross-sectional view of the body of this creation when it stops at the maximum opening angle. ﹝Figure 9﹞ is a three-dimensional appearance diagram of the body of this creation when it stops at the maximum opening angle.

1: Single axis hub structure

2: Pivot

21: The first connection part

24: Outer ring

25: Sector block

251: The first stop

252: Second stop

3: Bracket

31, 32: Bend sheet

33: Second connecting part

34: Link Board

342: Positioning hole

4: The first concave cam

43: Scalloped straight plate

442: bump

5: The second concave cam

6: Twist positioning unit

61: elastic sheet

62: cap

Claims (10)

A uniaxial pivot structure, comprising: a pivot shaft, one end of which has a first connecting portion for connecting a body, and the other end of the pivot shaft has a cylindrical portion extending axially and a positioning rod portion; a bracket, one end of which has a second connecting portion for connecting to another body, the other end of the bracket has a connecting plate, and the connecting plate has a pivot hole for pivoting the cylindrical portion of the pivot; a first concave cam, which is pivotally connected to the cylindrical portion of the pivot, a set of symmetrical ascending portions on one side of the first concave cam, and the ascending portion includes a trapezoidal groove, a flat portion and a The second sloped portion, the trapezoidal groove has a first sloped portion, the first sloped portion, the flat surface portion and the second sloped portion are sequentially extended in the axial direction of the pivot, the other of the first concave cam side connecting the web; A second concave cam, which is sleeved on the positioning rod for synchronous rotation with the pivot, one side of the second concave cam has a set of symmetrical convex parts, and the set of convex parts presses against the each of the trapezoidal grooves of the set of risers; and A twist positioning unit is sleeved on the positioning rod portion of the pivot for pressing the second concave cam to press the first concave cam. The uniaxial hinge structure of claim 1, wherein the peripheral edge of the cylindrical portion further has an outer ring portion, and the outer ring portion has a first stop portion and a second stop portion; one of the connecting plates of the bracket There is a bump on the side surface, and when the first connecting part rotates relative to the second connecting part, the two sides of the bump are respectively pressed against the first stop part and the second stop part to limit the position at the between a rotation angle. The uniaxial hinge structure of claim 2, wherein the outer ring portion comprises a radially outwardly convex sector-shaped block, the first stop portion is an end surface of the sector-shaped block, and the second stop portion is an end surface of the sector-shaped block. the other end face. The uniaxial hinge structure of claim 2, wherein a positioning hole is formed on the plate surface of the connecting plate, the other side of the first concave cam has an axially extending engaging portion, and the engaging portion passes through the positioning holes to connect the web. The uniaxial hinge structure of claim 4, wherein the engaging portion includes a segment portion and the protruding block, the segment portion is accommodated and positioned in the positioning hole of the connecting plate, and the protruding block is formed by one of the connecting plates. bulges out laterally. The uniaxial hinge structure of claim 5, wherein the side surface of the connecting plate presses against a side surface of the outer ring portion, and the side surface of the connecting plate has a plurality of oil storage grooves arranged in an annular array. The uniaxial hinge structure of claim 1, wherein the circumference of the cylindrical portion of the pivot shaft further has at least one helical groove axially surrounding it; the first concave cam is a sleeve with an axial gap, and the first concave cam The outer peripheral edge has a radially outwardly convex and axially extending fan-shaped straight plate, one end of the fan-shaped straight plate has an engaging portion, and the other end of the fan-shaped straight plate has the flat portion. The uniaxial hinge structure of claim 1, wherein the first concave cam is a sleeve with an axial gap, the inner periphery of the first concave cam has at least one oil storage straight groove extending axially, the at least one oil storage straight groove The oil straight groove and the axial notch are parallel to each other, and the at least one oil storage straight groove is annularly distributed on the outer periphery of the cylindrical portion of the pivot shaft. The uniaxial hinge structure of claim 1, wherein the trapezoidal groove of the first concave cam further comprises a bearing surface; the set of protruding parts of the second concave cam are respectively trapezoidal blocks, and the protruding part has a top when the first concave cam and the second concave cam are in the closed state, the set of raised parts are respectively accommodated in the set of trapezoidal grooves of the set of gradually rising parts, the The pressing surfaces of the set of raised portions press against the first inclined surface portion of the set of trapezoidal grooves respectively, and the abutting surfaces of the set of raised portions press against the set of bearing surfaces of the set of trapezoidal grooves respectively. The uniaxial hinge structure of claim 1, wherein the torsional positioning unit comprises at least one elastic piece and a cap coaxially positioned on the positioning rod portion of the pivot, for the at least one elastic piece to press against the second concave cam to tighten the first concave cam.

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