KR20040079289A - Apparatus for preventing closing impact of gyration cover - Google Patents

Abstract

PURPOSE: An impact preventing device in shutting a turning lid is provided to install the body easily without damage with simple structure, and to prevent damage by absorbing shock with a gas shock absorber at the initial stage. CONSTITUTION: An impact preventing device(15) of a turning lid is composed of a main frame(17) fastened on a flat part of a body and composed of a first support pin(27) applying supporting force; a turning frame(19) pivotally connected to the main frame, turned up and down to the main frame, and composed of a roller(21) rolling and contacting to the turning lid in moving the turning lid down and a second support pin(29) between the roller and the pivot connection part; and a gas shock absorber(23) mounted between the main frame and the turning frame, combined with the first and second support pins, and compressed longitudinally in pressing and turning the turning frame to the main frame by the turning lid to apply buffering force.

Description

{Apparatus for preventing closing impact of gyration cover}

The present invention relates to a rotating cover closing impact protection device, and more particularly, when the rotating cover is provided to be rotatable in the product main body when the rotating cover is rotated and closed by an abnormal force applied from the outside in the open state. It relates to a rotating cover closing impact protection device to prevent the collision of the.

Some electronic products, machinery, structures, etc. have a main body and a rotating cover which can be rotated up and down on the upper part of the main body as its components. In such electronic products, machinery or structures, the pivoting cover serves to cover an important part of the main body. When the main body is used, the pivoting cover rotates upward to maintain an open state. Protect the site.

The rotation cover is to be rotated up and down by the user, and unless the separate rotation device is installed, the rotation cover must be rotated upward by 90 degrees or more from the main body by the force of maneuvering so that its center of gravity exceeds the vertical line.

An example in which the rotating cover as described above is used includes a keyboard instrument such as a piano or an organ. The rotating cover used for the keyboard musical instrument is connected to the main body by a hinge as shown in FIG. 2 and rotates up and down using the hinge as a rotating shaft. Such a rotational cover is usually rotated to the bottom to cover the keyboard to protect the keyboard, and when used, it is raised to the top and put back.

Meanwhile, as shown in FIG. 2, when an abnormal force is applied to the rotation cover in a state in which the rotation cover 33 is slid back, the rotation cover may freely fall forward and collide with the main body. Rotational fall in this specification means a rotational motion that does not reach an external force during the downward rotation and rotates only by its own weight and finally collides with the main body.

For this reason, various kinds of rotating cover closing impact protection devices have been proposed to prevent the rotating fall of the cover in a product having a rotating cover that rotates up and down.

Conventional impact protection devices include mechanical assemblies having cams, springs and levers as components, or hydraulic shock absorbers having oil as damping means.

However, the conventional mechanical assembly has the inconvenience of complicated configuration and cumbersome installation. In particular, there was a problem in that a groove for accommodating the mechanical assembly is formed in the main body for installation. In addition, the hydraulic shock absorber may leak the oil filled inside when it is used for a long time, and it may cause the product failure as well as the shock absorber itself. In some cases, the shock absorber may be damaged by not absorbing the shock.

The present invention has been created to solve the above problems, the structure is simple and the installation is simple, in particular, there is no need to damage the main body for installation. In addition, by employing a gas-type shock absorber, even if a momentary impact from the outside, even if the initial impact is unreasonably extinguished, the purpose of the present invention is to provide an anti-rotation cover closing shock prevention device that does not overdo the device.

1a, 1b, 1c are diagrams for explaining the basic mechanism of the rotating cover closing impact protection device according to the first embodiment of the present invention;

Figure 2 is a perspective view showing a state in which the rotation cover closing impact preventing device according to the first embodiment of the present invention, for example, applied to a keyboard instrument.

Figure 3 is an exploded perspective view of the impact preventing device of Figure 2;

4 is a cross-sectional view taken along the line IV-IV of FIG. 3.

5A, 5B, 5C, and 5D are partial cross-sectional views shown for explaining the operation of the impact preventing device shown in Fig. 2;

6A, 6B, and 6C are diagrams for explaining the basic mechanism of the rotating cover closing impact preventing apparatus according to the second embodiment of the present invention.

7 is an exploded perspective view showing a part of the impact preventing device of FIG.

8 is a perspective view showing a part of the impact preventing device of FIG.

<Explanation of symbols for the main parts of the drawings>

10: body 11.33: rotating cover

13: Hinges 15, 16: Shock prevention device

17: main frame 18: buffer

19, 20: Rotation frame 21: Roller

23: gas shock soba 25: rotating pivot

27: first support pin 29: second support pin

31: keyboard instrument 35: hinge

37: The plane part 41: Keyboard

43: reinforced rib 45: the first holder

47: second holder 49: gas cylinder

51: operating rod 53: roller support groove

55: internal space 57: bottom

59: support protrusion 61: leaf spring

63: pivot pivot support 65: adhesive sheet

71: wire 73: support plate

75: wire fixing pin 77: hook

79: support ball 81: hook groove

In order to achieve the above object, the present invention is to be installed on the product body having a flat portion to be rotated up and down, but to rotate downward to cover the flat portion to prevent the rotating cover to fall to the flat portion side to prevent the collision with the main body,

A main frame fixed to an upper surface of the flat part and having a first support pin to provide a support force to the outside; Its lower end is pivotally connected to the mainframe so that it can be rotated up and down with respect to the mainframe, and the upper part is provided with a roller which contacts the pivoting cover and rotates in the direction of rotation of the pivoting cover, between the roller and the pivot connection part. A rotation frame having a second support pin for providing a support force; Gas 쇽 which is installed between the main frame and the rotating frame, each end is coupled and supported by the first and second support pins, the compression frame is compressed in the longitudinal direction when the rotating frame is pressed by the rotating cover to rotate to the main frame side, providing a buffer force Characterized in that it comprises a soba.

In addition, in order to achieve the above object, the present invention is installed to be able to rotate up and down on the product body having a flat portion to rotate downward to prevent the rotating cover to cover the flat portion to fall to the flat portion to prevent the collision with the main body,

A main frame fixed to an upper surface of the flat part and having a first support pin to provide a support force to the outside; A pivot frame connected to the main frame at a lower end thereof to be rotatable up and down with respect to the main frame, and a wire fixing part provided at an upper end thereof, and a pivot frame having a second support pin between the wire fixing part and the pivot connection part to provide support to the outside; ; A gas shock absorber installed between the main frame and the rotating frame, each end of which is coupled to and supported by the first and second support pins, and the rotating frame is compressed in the longitudinal direction when the rotating frame rotates to the main frame side by an external force; ; One end is fixed to the wire fixing part and the other end is fixed to the rotation cover to connect the rotation cover and the rotation frame so that the rotation frame is pulled by the wire when the rotation cover is rotated toward the flat side to rotate downward simultaneously with the rotation cover It is done.

In addition, the rotating cover closing impact protection device is installed on the rotating path of the rotating cover, the rotating central axis of the rotating frame and the rotating central axis of the rotating cover are parallel to each other and the rotating frame supports the rotating cover with a roller upwards. Pressed by the weight of the rotation cover in a state characterized in that the slow rotation to the main frame side.

In addition, the rotating cover closing impact protection device is located on the opposite side of the rotation path of the rotation cover with the rotation center axis of the rotation cover, the rotation center axis of the rotation frame and the rotation center axis of the rotation cover are parallel to each other, Parallel to the second support pin and a wire fixing piece for providing a support force to the outside, the wire is fixed to the hook that is fitted to the support plate at one end and the other end is provided with a support ball of a constant diameter, the rotating cover the wire It is characterized in that the support plate having a hanger groove for providing a clearance of a width smaller than the diameter of the support ball by supporting the support ball therein is fixed.

In addition, the gas shock absorber is composed of a gas cylinder and a working rod movable in the longitudinal direction with one end inserted into the gas cylinder by using compressed gas as a working fluid, the end of the gas cylinder and the working rod. The end of the first and second support pins are characterized in that the first and second holders to be detachably coupled.

In addition, the main frame is in the form of a case having a bottom surface and four walls so as to accommodate the gas shock absorber therein, the bottom surface of the main frame by rotating the rotating frame to the main frame side When the absorber is rotated to the bottom surface side is characterized in that the leaf spring is provided with an elastic support upward.

In addition, the bottom surface corresponding to the plane of the main frame is further provided with an adhesive sheet for fixing the main frame to the plane, characterized in that the product is a keyboard instrument.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1A, 1B, 1C are diagrams for explaining the basic mechanism of the anti-rotation cover closing impact preventing apparatus according to the first embodiment of the present invention.

Basically, the rotating cover closing impact preventing device of the present invention is connected to the hinge 13 with respect to the main body 10 having the flat portion 37 as shown in Figures 1a, 1b, 1c or 6a, 6b, 6c. The rotating cover 11 which can be rotated up and down is rotated to the main body 10 side to prevent the impact from occurring.

The main body 10 includes a main body of various products having a rotating cover on the top thereof and having a flat portion, and of course, the impact preventing device of the present invention can be applied to the keyboard musical instrument shown in FIG. 2.

1A, 1B, and 1C, the rotating cover closing impact preventing device 15 according to the present embodiment is installed on a flat portion 37 which the rotating cover 11 pivots downward to cover and is in the direction of arrow a. It can be seen that by lowering the rotating cover 11 to be rotated to slow down to prevent the collision of the main body 10 and the rotating cover (11).

The impact preventing device 15, the main frame 17 is fixed on the flat portion 37, and the lower end of the main frame 17 by the pivot pivot 25 so as to be rotatable on the upper portion of the main frame 17 Rotating frame 19 is connected to the support 17, the gas frame soba 23 is fixed to both ends of the main frame 17 and the rotation frame 19 to support the rotation frame 19 in the direction of the arrow b (23). It is configured to include).

The main frame 17 has a shape of a case providing a rectangular space as shown in FIG. 3, and when the state of FIG. 1c is in the state of FIG. 1c, the main frame 17 may accommodate a part of the gas shock absorber 23 and the rotating frame 19 therein. Can be. A first support pin 27 is provided on the opposite side of the pivot pivot 25 inside the main frame 17 so as to support one end of the gas shock absorber 23.

The pivot frame 19 connected to the pivot pivot 25 with respect to the main frame 17 is a linear member supported in the direction of arrow b by the gas shock absorber 23 and has a roller 21 at an upper end thereof. . The roller 21 smoothly descends the rotation cover 11 by rolling the roller cover 11 in the direction of arrow a while continuously pressing the rotation frame 19 while rolling the cover 19. To induce.

In addition, the second support pin 29 is located on the upper side of the pivot pivot 25 in the drawing. The second support pin 29 corresponds to the first support pin 27 of the main frame 17 and is coupled to the operating rod (51 in FIG. 2) of the gas shock absorber 23.

Referring to FIG. 1A, the pivoting cover 11 is folded back to the upper back of the main body 10. The pivoting cover 11 is, for example, the main body 10 by a separate support wall w or a support (not shown). It waits with the obtuse angle angle with respect to the flat part 37 of (). At this time, the rotation frame 19 of the impact preventing device 15 is elastically supported in the direction of the arrow b in the state opened as much as possible by the gas shock absorber 23, of course.

On the other hand, when an abnormal force is applied to the pivoting cover 11 in the above state, the pivoting cover 11 can fall down to the impact preventing device 15 by rotating the hinge 13 in the direction of the arrow a toward the pivoting shaft.

FIG. 1B is a view illustrating the moment when the rotating cover 11 collapsing in the direction of arrow a hits the impact preventing device 15 due to the above reason, and the rotating cover 11 is in contact with the outer circumferential surface of the roller 21. The impact of the moment when the rotating cover 11 hits the roller 21 of the impact preventing device 15 is transmitted to the gas shock absorber 23 through the rotating frame 19 to be immediately absorbed.

As shown in FIG. 1B, the rotating cover 11 that reaches the impact preventing device 15 rotates slowly downward while pressing the rotating frame 19 by its own weight. Without the impact preventing device 15, the rotating cover 11 will drop to the body as it is, of course, the impact will occur.

As the pivoting cover 11 presses the pivoting frame 19, the pivoting frame 19 rotates in the direction of the arrow c to move to the main frame 17 side. At this time, the roller 21 is rolling with respect to the rotation cover (11). Since the roller 21 is in direct contact with the rotating cover 11 and the rolling motion element is made of durable and impact-resistant material, for example, it may be made of reinforced plastic or rubber or metal.

As described above, while the rotation frame 19 gradually moves in the direction of the arrow c, the first and second pins 27 and 29 gradually become closer, and the gas shock absorber 23 is compressed.

Subsequently, referring to FIG. 1C, it can be seen that the rotating cover 11 completely rotates toward the main body 10 to cover the main body 10. In addition, the rotation frame 19 of the impact preventing device 15 is partially inserted into the main frame 17 with the gas shock absorber 23 therebetween.

In this state, when the pivoting cover 11 is lifted upward, the operating rod (51 in FIG. 2) of the gas shock absorber 23 pushes the second support pin 29 to rotate the pivoting frame 19 upward. . However, the upward rotation force of the rotation frame 19 does not rotate the rotation cover 11 upward.

Detailed configuration of the impact preventing device 15 will be described later with reference to FIGS.

On the other hand, since the impact preventing device 15 has the rotation mechanism as described above, it can be sufficiently fixed to the main body 10 only by the adhesive tape. In this embodiment, by applying an adhesive sheet (65 in Fig. 5a) was fixed to the impact preventing device 15 to the main body 10.

Figure 2 is a perspective view showing a state in which the rotating cover closing impact preventing device according to the first embodiment of the present invention, for example, applied to a keyboard instrument.

The keyboard musical instrument may include a piano organ harpsichord cambalo, and the like, which will be collectively referred to as a keyboard musical instrument.

As shown, a plurality of keys 41 are located in front of the main body 32 of the keyboard musical instrument 31. The keyboard 41 is covered by a pivoting cover 38. The pivoting cover 33 is connected to the main body 32 by a hinge 35, and rotates up and down to cover the keyboard 41 and rotates upward to lean against the rear wall (not shown) of the main body. Lose.

On the other hand, as known in the art, the planar portion 37 is provided on the outer side of the outermost keyboard 41 in almost all keyboard musical instruments. The planar portion 37 is a portion that provides a free space so that the outermost key 41 can be accurately and easily pressed, and is simultaneously covered by the pivoting cover 33 together with the key 41.

The impact preventing device 15 according to the present embodiment may be installed at the center of the flat portion 37. The impact preventing device 15 is installed on the flat part 37 to prevent the pivoting cover 33 from colliding with the main body 32 when the pivoting cover 33 falls to the side of the keyboard 41 by an abnormal force. .

Basically, the operation mechanism of the impact preventing device 15 is the same as that of FIGS. 1A, 1B and 1C and will be described in more detail with reference to FIGS. 5A, 5B and 5C.

The impact preventing device 15 is attached and fixed to the surface of the flat portion 37 by an adhesive sheet (65 in Figure 5a). Therefore, it is not necessary to dig out the necessary part of the main body in order to secure a space for installing the impact protection device as in the conventional case does not have to damage the instrument. In addition, when the impact preventing device 15 is not necessary, the impact preventing device 15 may be simply lifted from the flat part 37. The adhesive sheet may be a synthetic resin tape or rubber sheet provided with adhesive strength on both sides.

The impact preventing device 15 provides a rectangular inner space and is connected to the main frame 17 and the main frame 17 which are attached and fixed to the flat part 37 by a pivot pivot 25, and in the direction of arrow c. The gas frame, which is installed between the rotating frame 19 and the main frame 17 and the rotating frame 19, which is rotatably waiting, is connected to and supported at both ends of the main frame 17 and the rotating frame 19. It consists of a bar 23.

A detailed configuration of the impact preventing device will be described later with reference to FIG. 3.

3 is an exploded perspective view of the pivoting cover closing impact preventing device of FIG.

Referring to the drawings, it can be seen that the mainframe 17 takes the form of one case including a bottom surface and four walls. The main frame 17 supports the end portions of the gas shock absorber 23 and the rotation frame 19, respectively. For this purpose, a first support pin 27 is provided inside one end and a pivot pivot inside the other end. The support 63 is formed.

The first support pin 27 is a rod-shaped pin of a predetermined length, spaced apart from the wall surface of the main frame 17, and coupled to the first holder 45 of the gas shock absorber 23. In addition, the pivot pivot support 63 accommodates and supports the pivot pivot 25 at the bottom of the pivot frame 19 as through holes formed on both sides of the wall to face each other.

In addition, a leaf spring 61 is installed on the bottom surface 57 of the main frame 17. The leaf spring 61 is curved upwardly and has an elastic metal plate to elastically support the gas cylinder 49 upwardly with respect to the main frame 17 as described below. In addition, the support protrusion 59 is formed on the bottom surface of the main frame 17. The support protrusion 59 is a protrusion for supporting one end of the leaf spring 61 and prevents the leaf spring 61 from moving toward the pivot pivot support 63.

The pivot pivots 25 formed on both sides of the lower end of the pivot frame 19 are circular cross-section pins having the same central axis, and are formed to face outwards of the pivot frame 19, respectively. ) Is inserted. When the pivot pivot 25 is inserted into the pivot pivot supports 63, the pivot frame 19 can be lifted with respect to the main frame 17.

A second support pin 29 is provided on the upper side of the pivot pivot 25. The second support pin 29 is a pin having a circular cross section similarly to the first support pin 27 and coupled to the second holder 47 to be described later.

In addition, a roller support groove 53 is formed at an upper end of the rotation frame 19, and a roller 21 is fitted into the roller support groove 53. As described above, the roller 21 is a roller which moves in a rolling motion with respect to the rotating cover when the rotating cover is rotated downward. In particular, the central portion of the roller 21 has a concave shape.

The curvature of the central portion of the roller 21 is equal to the curvature of the outer circumferential surface of the gas cylinder 49 of the gas shock absorber 23. Therefore, as shown in FIG. 5D, when the rotating frame 19 is completely lowered, the roller 21 is in linear contact with the gas cylinder 49 and does not shake from side to side.

A plurality of reinforcing ribs 43 are also formed on the inner surface of the pivot frame 19 facing the main frame 17. The reinforcing rib 43 is to enhance the rigidity of the rotating frame 19, the front end is concave curved. Therefore, when the rotating frame 19 is completely lowered as shown in FIG. 5D, the tip portion of the reinforcing rib 43 may be interviewed with the outer circumferential surface of the gas cylinder 49.

On the other hand, the gas shock absorber 23 is provided between the main frame 17 and the rotation frame 19, the gas cylinder 49 is filled with gas inside, one end of the gas cylinder 49 It is composed of an actuating rod 51 inserted into and longitudinally reciprocated. The actuating rod 51 is a rod that provides the supporting force in the direction of the arrow f and waits as far as possible from the gas cylinder 49 when no external force is applied.

The first holder 45 is integrally formed at the end of the gas cylinder 49. The first holder 45 is a cylindrical holder opened to the outside to accommodate the first support pin 27 therein so that the gas cylinder 49 is supported by the first support pin 27. The first holder 45 may be relative to the first support pin 27. Also, the first holder is detachable with respect to the first support pin 27.

The second holder 47 is fixed to the extended end of the actuating rod 51. The second holder 47 has the same shape as the first holder 45 and accommodates the second support pin 29 therein to connect the operation rod 51 to the rotation frame 19. The second holder 47 is also movable relative to the second support pin 29 and detachable with respect to the second support pin 29.

As a result, the gas shock absorbers 23 are partially inserted into the inner space 55 of the main frame 17 by fitting the first and second holders 45 and 47 to the first and second support pins 27 and 29. The rotating frame 19 is accommodated and positioned substantially perpendicular to the main frame 17 as shown in FIG. 2. The first and second holders 45 and 47 may be made of synthetic resin that can be elastically deformed.

4 is a cross-sectional view taken along the line IV-IV of FIG. 3.

Referring to the drawings, it can be seen that the adhesive sheet 65 is attached to the bottom of the main frame 17. In addition, a pivot pivot support 63 is formed in the inner space 55 of the main frame 17. The pivot pivot support 63 is opposed to each other and accommodates a pivot pivot (25 in FIG. 3) to be rotatable therein.

Figures 5a, 5b, 5c, 5d is a partial cross-sectional view for explaining the operation of the rotating cover closing impact protection device shown in FIG.

Referring to FIG. 5A, the pivoting cover 33 connected to the main body 32 with the hinge 35 is leaned in a completely open state. In addition, it can be seen that the impact preventing device 15 is fixed to the upper portion of the flat portion 37 of the main body 32 by the adhesive sheet 65.

In addition, the first and second holders 45 and 47 of the gas shock absorber 23 partially installed in the inner space of the main frame 17 are fitted to the first and second support pins 27 and 29 to be rotated. Frame 19 is positioned almost perpendicular to mainframe 17.

In this state, when the external cover is applied to the rotation cover 33 in the direction of arrow a and the rotation cover 33 falls to the impact preventing device 15 side, the rotation cover 33 is applied to the roller 21 as shown in FIG. 5B. Bump.

FIG. 5B is a view showing the moment when the rotating cover 33 falls to the impact preventing device 15 side with the hinge 35 as the rotating shaft and hits the roller 21.

As shown in the drawing, the rotation cover 33 rotates toward the impact preventing device 15 and hits the roller 21 so that the rotation energy is first attenuated. Since the gas shock absorber 23 uses a compressible gas as a working fluid, the gas shock absorber 23 is absorbed by the gas shock absorber 23 even in the case of a momentary collision, so there is no risk of damage due to the impact on other parts. As described above, after the rotation speed of the rotation cover 33 is primarily attenuated, the rotation cover 33 rotates downward by pressing the rotation frame 19 at its own weight.

That is, referring to Figure 5c, the rotation cover 33 is rotated in the direction of the arrow a while pressing the rotation frame 19 with its own weight. Since the second support pin 29 is gradually closer to the first support pin 27 while the rotation frame 19 is rotated downward, the operating rod 51 of the gas shock absorber 23 compresses the gas. The gas cylinder 49 gradually moves toward the gas cylinder 49, and the gas shock absorber 23 also gradually rotates in the direction of the arrow k with respect to the first support pin 27. At this time, the roller 21 is a rolling motion in the direction of the arrow h with respect to the rotation cover 33, of course.

As the gas shock absorber 23 rotates in the direction of the arrow k as described above, the leaf spring 61 provided on the bottom surface of the main frame 17 is gradually pressed downward by the gas cylinder 49. One end of the leaf spring 61 is supported by the support protrusion 59, and the other end thereof is unfolded while being pushed downward to move the other end toward the first support pin 27.

5D is a view showing a state in which the pivoting cover 33 finally descends to the maximum.

As shown in the drawing, the rotating frame 19 and the gas shock absorber 23 are completely rotated and overlapped downward while being pressed by the weight of the rotating cover 33. At this time, the outer circumferential surface of the roller 21 of the rotating frame 19 and the front end portion of the reinforcing rib 43 come into contact with the outer circumferential surface of the gas cylinder 49 as described above. As the gas cylinder 49 is completely lowered, it can be seen that the leaf spring 61 is further pressed downward.

As can be seen in the above process, even if the rotation cover 33 falls in the direction of arrow a in FIG. 5A, the rotational energy is attenuated and slowly descended by the impact preventing device, thereby causing the rotation cover 33 to collide with the main body. There is no.

On the other hand, if the lifting cover 33 in the state of FIG. 5d to the top lifts the operating rod side of the gas shock absorber 23 slightly by the elastic support force of the leaf spring 61 and at the same time the gas cylinder ( The operating rod 51 is drawn out of the gas cylinder 49 by the expansion force of the compressed gas in 49, and the rotation frame 19 is rotated upwards to come to the state of FIG. 5A.

6A, 6B and 6C are diagrams for explaining the basic mechanism of the rotating cover closing impact preventing apparatus according to the second embodiment of the present invention.

In the first embodiment, the impact preventing device 15 is located on the rotation path of the rotation cover 11 and is pressed by the weight of the rotation cover 11 to induce a slow rotation of the rotation cover 11. In this case, the impact preventing device 16 is installed on the opposite side of the rotation path of the rotation cover 11 with the rotation cover 11 therebetween to induce a slow closing of the rotation cover 11. The operation mechanism of the impact preventing device 16 of this embodiment is almost the same as that of the first embodiment.

In addition, the same reference numerals as those of the first embodiment refer to the same members having the same function, and a detailed description thereof will be omitted.

Basically, the rotating cover closing impact protection device according to the present embodiment is fixed to the flat portion 37, the shock absorbing portion consisting of the main frame 17, the rotation frame 20 and the gas shock absorber 23 ( 18), a support plate 73 fixed to an outer surface of the pivot cover 11 and having a hook groove (81 in FIG. 8), and a wire connecting the upper end of the support plate 73 and the pivot frame 20 ( 71).

Before describing the operation mechanism of the rotating cover closing impact preventing apparatus according to the present embodiment will be described the configuration of the wire 71, the support plate 73 and the buffer unit 18.

Referring to Fig. 7, the shock absorbing portion 18 in this embodiment has a configuration substantially the same as that of the impact preventing device 15 of the first embodiment. The buffer unit 18 is connected to the main frame 17 and the rotating frame 20 which is installed on the upper portion of the main frame 17 so as to be rotatable, and the main frame 17 and the rotating frame 20. The gas shock absorber 23 is configured to include. The main frame 17 and the gas shock absorber 23 are the same as in the first embodiment.

A wire fixing pin 75 is provided at an upper end of the pivot frame 20. The wire fixing pin 75 is a rod-shaped pin that supports one end of the wire 71 and is pulled by the wire 71 to be rotated toward the main frame 17 as described later.

Support balls 79 and hooks 77 are fixed to both ends of the wire 71, respectively. The wire 71 is preferably using a metal wire, but may be a synthetic resin line according to the embodiment.

The support ball 79 is inserted between the support plate 73 and the rotating cover 11 as a metal ball (金 屬 球) having a predetermined diameter is caught in the hook groove (81). The support ball 79 may be made of reinforced plastic or synthetic resin instead of metal. In addition, the hook 77 has the same shape as the second holder 47 and is detachable with respect to the wire fixing pin 75.

The support plate 73 is shown in FIG. Referring to Figure 8, the support plate 73 is fixed to the outer surface of the rotation cover (11). The support plate 73 is a plate made of metal and is fixed to the rotation cover 11 by fixing means such as screws.

A hook groove 81 having a predetermined width and length is formed in a central portion of the support plate 73. The support plate 73 is pressed so that the hook groove 81 is spaced apart from the rotation cover 11 so that the support ball 79 may be positioned between the support plate 73 and the rotation cover 11.

Of course, the width of the hook groove 81 should be smaller than the diameter of the support ball (79). In addition, the hook groove 81 may be pulled out of the support ball 79 in the direction of the arrow p from the hook groove 81 when the portion toward the free end of the rotating cover 11 is open and the wire 71 is not required. However, the support ball 79 is always pulled in the direction of the arrow m by the tensile force applied to the wire 71 and the weight of the wire.

6, the operation mechanism of the shock absorber 16 according to the second embodiment will be described as follows.

Referring to Figure 6a, it can be seen that the rotating cover 11 is supported by the main body 10 in an open state. In addition, both ends of the wire 71 are supported by the wire fixing pin 75 of the rotation frame 20 and the hook groove 81 of the support plate 73. In particular, the wire 71 is lowered by the weight of the wire to prepare for the falling down of the rotating cover 11 as shown in Figure 6b.

In the state of FIG. 6A, when a rotational force in the direction of arrow a is applied to the rotation cover 11 from the outside, the rotation cover 11 moves forward along the direction of arrow a and the wire 71 is momentarily tightened and the rotation cover The rotational force of 11 moves to the rotation frame 20 side through the wire 71, and the rotation frame 20 starts to rotate in the direction of the arrow c along the rotation cover 11 as shown in FIG. 6B.

As shown in FIG. 6B, even if the pivoting cover 11 falls forward toward the main body 10, the pivoting cover 20 is tensioning the pivoting cover 11 through the wire 71 from the rear so that the pivoting cover 11 is rotated. ) Will slow down without free fall. It goes without saying that the wire 71 is tensioned in the meantime.

6C, it can be seen that the pivoting cover 11 completely rotates toward the main body 10 to cover the main body 10. In addition, the rotation frame 20 also maintains a state in which fully rotated to the main frame 17 side. The rotating frame 20 rotates at the same time as the rotating cover 11, but the rotating cover 11 is completely rotated to cover the main body 10 until it is inserted into the main frame 17 as shown in FIG. 6C. There is no need to rotate.

In any case, when the pivoting cover 11 is lifted upward in the state of FIG. 6C, the pivoting frame 20 pivots upward by the operation of the leaf spring 61 and the gas shock absorber 23, and the process of FIG. It becomes the state of.

Eventually, the rotational cover closing shock prevention device of the present invention configured as described above, by using the buffer capacity of the gas shock absorber can prevent the rotational fall of the rotational cover is safe enough to induce the slow rotation of the rotational cover to rotate the rotational cover Can be slowly closed under the control of gas shock so the product is luxurious and easy to use.

As mentioned above, although this invention was demonstrated in detail through the specific Example, this invention is not limited to the said Example, A various deformation | transformation is possible for a person with ordinary knowledge within the scope of the technical idea of this invention.

Rotating cover closing impact protection device of the present invention made as described above, the structure is simple and the installation is simple, in particular, there is no need to damage the main body for installation. In addition, by adopting a gas shock absorber, even if a momentary shock is applied from the outside, the initial shock is easily digested so that the device does not suffer.

Claims (8)

It is installed to be able to rotate up and down on the product main body having a flat part, but by rotating downward to prevent the rotating cover which covers the flat part from falling down toward the flat part to collide with the main body, A main frame fixed to an upper surface of the flat part and having a first support pin to provide a support force to the outside; Its lower end is pivotally connected to the mainframe so that it can be rotated up and down with respect to the mainframe, and the upper part is provided with a roller which contacts the pivoting cover and rotates in the direction of rotation of the pivoting cover, between the roller and the pivot connection part. A rotation frame having a second support pin for providing a support force; Gas 쇽 which is installed between the main frame and the rotating frame, each end is coupled and supported by the first and second support pins, the compression frame is compressed in the longitudinal direction when the rotating frame is pressed by the rotating cover to rotate to the main frame side, providing a buffer force Rotating cover closing impact prevention device comprising a soba. It is installed to be able to rotate up and down on the product main body having a flat part, but by rotating downward to prevent the rotating cover which covers the flat part from falling down toward the flat part to collide with the main body, A main frame fixed to an upper surface of the flat part and having a first support pin to provide a support force to the outside; A pivot frame connected to the main frame at a lower end thereof to be rotatable up and down with respect to the main frame, and a wire fixing part provided at an upper end thereof, and a pivot frame having a second support pin between the wire fixing part and the pivot connection part to provide support to the outside; ; A gas shock absorber installed between the main frame and the rotating frame, each end of which is coupled to and supported by the first and second support pins, and the rotating frame is compressed in the longitudinal direction when the rotating frame rotates to the main frame side by an external force; ; One end is fixed to the wire fixing part and the other end is fixed to the rotating cover to connect the rotating cover and the rotating frame so that the rotating frame is pulled by the wire to rotate downward simultaneously with the rotating cover when the rotating cover rotates toward the flat part side. Rotating cover closing shock prevention device. The method of claim 1, The rotating cover closing impact preventing device is installed on the rotating path of the rotating cover, the rotating central axis of the rotating frame and the rotating central axis of the rotating cover are parallel to each other, and the rotating frame supports the rotating cover with a roller upwards. Rotating cover closing shock prevention device, characterized in that the slow rotation to the main frame by pressing the weight of the rotating cover. The method of claim 2, The rotating cover closing impact protection device is located on the opposite side of the rotation path of the rotation cover with the rotation center axis of the rotation cover in between, and the rotation center axis of the rotation frame and the rotation center axis of the rotation cover are parallel to each other, and the wire fixing part has a second It is a wire fixing piece that is parallel to the support pin and provides the support force to the outside, The wire is fixed to one end of the hook is fitted to the support plate and the other end is provided with a support ball of a constant diameter, Rotating cover closing shock prevention device, characterized in that the support plate having a hook groove for providing a clearance of a width smaller than the diameter of the support ball by receiving the support ball of the wire therein is fixed to the rotation cover. The method according to claim 1 or 2, The gas shock absorber uses a compressed gas as a working fluid, and includes a gas cylinder and an operating rod movable in a longitudinal direction with one end inserted into the gas cylinder, and an end of the gas cylinder and an end of the operating rod. Rotating cover closing shock prevention device, characterized in that provided with the first and second holders to be detachably coupled to the first and second support pins. The method according to claim 1 or 2, The mainframe takes the form of a case having a bottom surface and four walls so as to accommodate the gas shock absorber therein, Rotating cover closing shock prevention device, characterized in that the bottom frame of the main frame is provided with a leaf spring for supporting the gas cylinder upward elastically when the gas shock absorber is rotated to the bottom side by rotating the rotation frame to the main frame side. The method of claim 6, Rotating cover closing impact protection device, characterized in that the bottom surface corresponding to the flat portion of the main frame is further provided with an adhesive sheet for fixing the main frame to the flat portion. The method according to claim 1 or 2, Rotating cover closing shock prevention device, characterized in that the product is a keyboard instrument.