JP2017124652A - Hinge structure provided with damping mechanism, console box provided with hinge structure, and damping method for console box lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge structure which has a damping mechanism and which is simple in structure, easily assembled and limited in weight and cost influence, and a console box provided with the hinge structure.SOLUTION: A hinge structure 10 that includes box side metal fittings 11 and lid side metal fittings 12 and rotatably connects the lid of a console box to the box is provided with a damping mechanism for braking the rotational motion of the lid before reaching a full-open position during a lid opening operation. The lid side metal fittings 12 have an inclined surface 21 which comes close to or into contact with the box side metal fittings 11 according to the lid opening operation and causes the lid side metal fittings 12 to be elastically deformed gradually by the pushing-in force of the box side metal fittings 11 through a more opening operation. The damping force of the damping mechanism comprises repulsion accompanying the elastic deformation of the lid side metal fittings 12 and friction between the box side metal fittings 11 and the lid side metal fittings 12 in a contact state.SELECTED DRAWING: Figure 1

Description

  The present invention includes a hinge structure provided with a damping mechanism, in particular, a damping mechanism for braking a door opening speed of a lid (lid) of a lidded console box installed in a vehicle such as a passenger car or a commercial vehicle, and the damping mechanism. The present invention relates to a console box and a damping method for a lid pivoting operation of the console box.

  A console box is generally installed on the side of a driver's seat of a vehicle such as a passenger car or a commercial vehicle, and is basically used as an accessory case. The console box is roughly divided into a lidless type and a lidded type. In the case of the lidless type, the top of the box can be opened and removed while the lid can be opened and closed via the hinge structure. It is provided and allows objects to be taken in and out from above when opened, and protects the inside of the box when closed, and the upper surface of the lid normally serves as an armrest. The present invention is directed to a hinge structure provided with a damping mechanism used in such a lidded console box. In this specification, the container body portion of the console box is referred to as a “box”, and the lid covering the container body portion is referred to as a “lid”. However, the use of the hinge structure according to the present invention is not limited to the console box.

  Various types of lids can be opened and closed. Generally, a hinge structure is used in which a lid side metal fitting fixed to the lid side is rotatably connected to a box side metal fitting fixed to the box side. The simplest hinge structure for a console box is one in which a user manually opens and closes a lid in a free state. If the hinge structure is as simple as this, if the user's hand moves away from the lid during the opening / closing operation, the lid will fall free by its own weight and return to the closed state, or it will remain open. It is not easy to use, such as the lid becoming unstable. One means for avoiding this is one that uses a spring to constantly urge the lid in the opening direction so as to keep the lid in the open position even if the user's hand leaves. In this case, a lock mechanism for separately locking the lid in a closed state is provided, and the lid is opened only when the user releases the lock to avoid an unexpected lid opening operation.

  FIG. 4 is a perspective view showing an example of a hinge structure having the above-described spring used in a console box of the prior art. In the figure, a part of the hinge structure is cut out to show the inside. In FIG. 4, the hinge structure 50 includes a box-side metal fitting 51 fixed to the box B, a lid-side metal fitting 52 fixed to the lid L, a hinge pin 53 connecting the two, and the lid L always facing the fully open position. And a spring 56 that urges it.

  Both the box-side metal fitting 51 and the lid-side metal fitting 52 are formed in a U-shaped cross section, and one metal fitting fits inside the other metal fitting at the open portion of both U-shaped, Both metal fittings 51 and 52 are rotatably connected by a hinge pin 53 penetrating through a through hole provided on the side surface. Here, the “U-shape” does not mean a “U” shape in a strict sense, but both side surfaces of the box-side metal fitting 51 and the lid-side metal fitting 52 are in the vicinity of both sides in the axial direction of the hinge pin 53. It extends on both the left and right sides to the opposite position, which means that they are connected together. In this specification, the “left / right” direction refers to a direction orthogonal to the longitudinal axis of the console box and coincides with the axial direction of the hinge pin 53. In addition, a “vertical” direction to be described later refers to a vertical direction orthogonal to the left-right direction. A flange portion is provided at one end of the hinge pin 53, which plays a role of retaining one side when passing through both the metal fittings 51, 52, and the hinge pin 53 is inserted into the through hole of both metal fittings 51, 52 on the other side. The hinge pin 53 is fixed by providing a caulking portion after insertion.

  In the illustrated example, the spring 56 is locked to the box side metal 51 at the center in the width direction of the hinge pin 53 and is locked to the lid side metal 52 at both ends in the width direction, so that the lid L is always opened from the box B. Is exerting a biasing force. With the above structure, in the hinge structure 50 shown in FIG. 4, when the lid L is released with the lid L closed, the lid L is always fully opened and maintained as shown by the one-dot chain line in the figure. Accordingly, the lid L is prevented from falling naturally from the intermediate position during the opening / closing operation. Note that a pair of bearing members 54 generally made of a resin material are disposed in the through holes of both the metal fittings 51 and 52 in order to make the rotation of the lid L smooth.

  According to the console box hinge structure 50 as described above, since the lid L is always urged by the spring 56 in the opening direction, the lid L is automatically opened when unlocked from the closed state. While the burden on the user is reduced, there arises a problem that when the lid L is fully opened by the biasing force of the spring 56, “bounce back” occurs. This harms the feeling of opening, and generates an impact sound that is uncomfortable for the user and the occupant. For this reason, as a measure to prevent this, some examples including a damping mechanism for braking the rotation operation of the lid L when fully opened are also disclosed in the prior art.

  One of them is a measure of providing a spring that biases the lid in the closing direction in addition to the spring that biases the lid in the opening direction as described above (see, for example, Patent Document 1). According to this measure, the lid is biased toward the neutral position that is set between the fully closed position and the fully open position, and the problem of rebound is solved. As another measure, the metal fitting on the lid side is provided with a fan-shaped gear, and the box side is provided with a rotary damper having a gear engaged therewith, so that when the lid is fully opened, the braking force of the rotary damper is used. The rotational speed of the lid is decelerated, and the deterioration of feeling due to impact sound or the like is eliminated (see, for example, Patent Document 2).

  According to still another measure, a pair of groove mechanisms called sliding dampers are provided, and a separate rod having a different axis from that of the hinge pin is passed therethrough. By reducing the width of each of the pair of groove mechanisms, the rod when moving along the groove mechanism receives sliding resistance and gives resistance to the lid opening and closing operation, which serves as a damping function (for example, (See Patent Document 3). In addition, another system that performs a damping function by using a separate member independent of the hinge mechanism is also disclosed (for example, see Patent Document 4). In this method, a branch arm is extended from a member called an opening / closing stopper that is pivotally supported on the lid side at a position away from the hinge pin and moves in an arc shape by connecting the lid and the box, and this arm is provided on the box side. The lid pivoting action is braked by utilizing the resistance when sliding between the holes.

JP 2000-272426 A JP 2002-331875 A JP 2000-185601 A Japanese Utility Model Publication No. 3-98159

  However, each of the various damping mechanisms in the above-described prior art has room for improvement. First, in the method shown in Patent Document 1, two types of springs are required, and the structure is complicated and complicated even when assembled, leading to an increase in weight. In the method shown in Patent Document 2, a fan-shaped gear, a rotary damper that engages with the fan-shaped gear, and a mechanism for fixing them are added, which increases the number of parts, processing man-hours, labor for adjustment, and cost. became. In the method shown in Patent Document 3, a sheet metal sliding damper is added in addition to the metal fittings on the lid side and the box side, and further, the structure becomes complicated due to the addition of a rod that moves through the sliding damper. An increase in man-hours is expected. The method shown in Patent Document 4 may be disadvantageous in that it is necessary to separately prepare an arm-shaped opening / closing stopper (damper) as a separate part in addition to the hinge structure.

  As described above, the present invention solves these problems in the prior art, has a simple structure, is easy to assemble, has a damping mechanism that has little influence on weight and cost, and the damping mechanism. It is an object of the present invention to provide a damping method for a lid rotating operation of a console box provided, and further a lidded console box.

  The present invention utilizes a box side metal fitting and a lid side metal fitting that constitute a hinge structure, bringing a box side metal fitting that moves adjacently when the lid is rotated into contact with the lid side metal fitting, and further elastically deforming the lid side metal fitting. The above-mentioned problem is solved by utilizing the repulsive force of the elastic deformation as a damping force for braking of the turning operation, and specifically includes the following contents.

  That is, one aspect according to the present invention is a console box hinge structure including a box-side metal fitting and a lid-side metal fitting that rotatably connects a lid of a lidded console box to a box body, The hinge structure includes a damping mechanism that brakes the rotation of the lid just before reaching the fully opened position during the lid opening operation. The lid side metal fitting approaches and comes into contact with the box side metal fitting that moves relatively close to each other according to the lid opening operation, and the lid side metal fitting is gradually elastically deformed by the pushing force of the box side metal fitting with the further opening operation. It has an inclined surface, and the damping mechanism is constituted by a repulsive force accompanying elastic deformation of the lid side metal fitting and a frictional force between the box side metal fitting and the lid side metal fitting in contact with each other. It is a feature.

  The inclined surface is either an inclined surface provided on the lid side metal fitting itself facing the box side metal fitting, or an inclined surface of a resin-made damping piece attached to the lid side metal fitting at a position facing the box side metal fitting. be able to.

  Either one or both of the box side metal fitting and the lid side metal fitting can be formed of a resin material. The hinge structure may further include a spring that constantly biases the lid toward the fully open position.

  According to another aspect of the present invention, in the lidded console box having a hinge structure that rotatably connects the lid to the box body side, the hinge structure is any one of the hinge structures described above. Concerning the console box.

  Yet another aspect of the present invention is a damping method for braking the pivoting movement of the lid before reaching the fully opened position when the lid of the lidded console box is opened, and the box side that moves relatively close when the lid is opened and closed The amount of elastic deformation of the lid side metal fitting by the pressing force of the box side metal fitting in the contact state gradually approaches and contacts the lid side metal fitting on the opposite surface of the metal fitting and the lid side metal fitting until it reaches the fully open position. An inclined surface is provided to increase the rotation of the lid, and the rotational movement of the lid is braked by a repulsive force corresponding to the elastic deformation amount of the lid side metal fitting and a frictional force between the box side metal fitting and the lid side metal fitting. It relates to a damping method.

  By implementing the present invention, it is possible to provide a console box hinge structure having a damping mechanism that is simple in structure and easy to assemble, and that minimizes weight and cost, and a console box having the structure. There is an effect that comfort related to sound and operability can be provided to a person.

It is a perspective view which shows the hinge structure of the console box provided with the damping mechanism which concerns on embodiment of this invention. It is explanatory drawing which shows operation | movement of the damping mechanism of the hinge structure shown in FIG. It is side surface sectional drawing which shows the other aspect of the hinge structure shown in FIG. It is a perspective view which shows the example of the hinge structure of the console box which concerns on a prior art.

  A hinge structure having a damping function according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a hinge structure 10 according to the present embodiment. The hinge structure 10 includes a box side metal fitting 11 attached to the box body side of a console box (not shown) and a lid side metal fitting similarly attached to the lid side. 12 and a hinge pin 15 that pivotably connects the two, and a hinge structure similar to that of the prior art is provided, and in addition, a damping piece 20 made of a resin material is provided. In FIG. 1, the description of a spring that constantly biases both the metal fittings 11 and 12 and a lid (not shown) in a direction to open is omitted, but it can be mounted in the same manner as the spring 56 shown in FIG. 4.

  The operation of the hinge structure 10 configured as described above is basically the same as that of the hinge structure 50 according to the related art shown in FIG. 4, that is, when the lid is closed, the box side metal 11 and the lid side metal 12 The two attachment portions are folded to a position where they are substantially parallel, and when the lid is opened, the lid side 12 is rotated around the hinge pin 15 and is opened to the fully open position shown in FIG. At that time, a pair of resin damping pieces 20 interposed between both arm portions of the box-side metal fitting 11 and the lid-side metal fitting 12 are sandwiched between the metal fittings 11 and 12 to interfere with the movement, and the lid is in the fully open position. The effect of braking the turning operation from the front is reached. In the present specification, a mechanism that exerts an action of braking the rotating operation is called a “damping mechanism”.

  An enlarged view of the damping piece 20 is shown on the lower side of FIG. The damping piece 20 in the present embodiment has a generally shogi piece-like shape as shown in the drawing, that is, has a pointed portion 24 on the upper side, and on the lower side of the expanded width, substantially parallel side surfaces 25. One is divided into a front surface (21, 22, 23) and the other is provided with a back surface. Among these, the front surface side includes a first inclined surface 21 whose thickness increases downward with respect to the back surface 26, an intermediate second inclined surface 22 connected thereto, and a vertical surface 23 extending further connected thereto. It is composed of The back surface 26 is a vertical surface, and a fixing boss 27 protrudes from the back of the figure at a substantially central position. In the present embodiment, the inclination angle of the first inclined surface 21 with respect to the back surface 26 is about 10 degrees, and the inclination angle of the second inclined surface 22 is about 1 degree. Depending on the angle and the weight of the lid, it is possible to select freely so as to obtain a good feeling when the lid is opened and closed.

  FIG. 2 is an enlarged partial cross-sectional view showing the relative movement during operation of the box-side metal fitting 11 and the lid-side metal fitting 12, showing only one side of the hinge structure that is symmetric, and the other side omitted. Is symmetric with this. In FIG. 2A, the damping piece 20 has a bottom surface in contact with a bent portion 12 a that is bent in an L shape horizontally from an arm portion of the lid-side metal fitting 12, and a rear surface 26 of the damping piece 20 is an arm on the lid side 12. A boss 27 that is in contact with the portion and extends from the back surface 26 of the damping piece 20 is positioned and fixed in a fixing hole 12b provided in the arm portion. FIG. 2A shows a state when the lid is closed. At this position, the box side metal 11 and the bent portion 12a of the lid side metal 12 are separated as shown in the figure. Next, when the lid is opened upward from this state, the hinge structure 10 rotates around the hinge pin 15 (see FIG. 1), and the arm portion of the lid side metal fitting 12 is moved accordingly. As shown by the white arrow A, the box side metal fitting 11 is relatively lowered.

  As apparent from FIG. 2A, the bent portion 11a provided at the edge of the box-side metal fitting 11 first approaches the first inclined surface 21 of the damping piece 20 during the lid rotating operation. It contacts and slides down relatively along the inclined surface 21 by the further rotation operation. When this operation acts like a cam, the bent portion 11a of the box-side metal fitting 11 pushes the damping piece 20 rightward in the figure, and when this further presses the lid-side metal fitting 11, the lid-side metal fitting 11 is elastically deformed. . FIG. 2 (b) shows this situation. The lid side metal fitting 12 is raised to the maximum (the box side metal fitting 11 is relatively lowered to the maximum), and the lid as shown by the white arrow B in the figure. The side fitting 12 is elastically deformed in the right direction in the figure. Due to the repulsive force that the lid side metal fitting 12 caused by this elastic deformation tries to return to the original, and the frictional force between the box side metal fitting 11 and the damping piece 20 in contact with each other, a braking force is generated for the operation of opening the lid. In addition, a damping effect is exerted on the lid opening operation.

  In FIG. 2 (b), the rotational speed of the lid is gradually reduced by the above-described braking force while the bent portion 11a of the box-side metal fitting 11 first slides down the first inclined surface 21 of the damping piece 20, and then the inclined portion is inclined. The gentler second inclined surface 22 reduces the deceleration, and further reaches the vertical surface 23 (both see FIG. 1) to exert a constant braking force. The material and thickness of the lid-side metal fitting 12 that is elastically deformed, the combination of the inclined surfaces 21, 22, and 23 of the damping piece 20, lengths, inclination angles, surface roughness, etc. are factors that directly affect the damping effect of the lid opening operation. These can be freely selected in consideration of the weight of the lid and the spring elastic coefficient of the hinge spring so as to obtain a preferable feeling. The connection between the inclined surfaces may be a curved surface without a step, or the inclined surface itself may be a curved surface curved inward or outward, without being linear. In the present embodiment, the lid side metal fitting 12 uses a 2.6 mm thick hot rolled steel plate SPHC, and the damping piece 20 uses an oil-impregnated acetal resin. The maximum thickness of the damping piece 20 is 5.1 mm, and the amount of elastic deformation of the lid side metal fitting 12 is 1 mm on one side of the hinge structure. Although not shown in the drawing, if necessary, the box-side metal fitting 11 can be brought into contact with the bent portion 12a of the lid-side metal fitting 12 to perform a stopper function when the lid is opened.

  FIGS. 3A to 3C show other examples of aspects related to the improvement of the hinge structure 10 according to the present embodiment. In FIG. 3A, the lid side metal fitting 13 itself is remodeled and the inclined portion 13b is formed of a sheet material by sheet metal working, and the bent portion 11a of the box side metal fitting 11 is brought into contact with the inclined surface and relatively lowered. Thus, the lid side metal fitting 13 is elastically deformed to brake the lid turning operation. The configuration according to this aspect presents the basic structure of the damping mechanism according to the present invention, which is the simplest form of the present invention. Even with such a configuration, the basic functions of the present invention can be sufficiently achieved. However, according to this aspect, the box-side metal fitting 11 and the lid-side metal fitting 13 are in direct metal contact, and problems such as abnormal noise being generated at the time of contact and scratches occurring on the surfaces of both metal fittings occur. Cheap. Preferably, as shown in FIG. 1, it is desirable from this point of view to interpose a resin material (damping piece 20) between them. However, at least one of the metal fittings 11 and 13 can be improved by using, for example, a steel plate coated with a resin, a steel plate baked with a special paint, or a steel plate subjected to other surface treatment. .

  Next, in another embodiment shown in FIG. 3B, the lid side metal fitting 13 is made of a sheet metal having an inclined surface 13b as shown in FIG. 3A, and the box side metal fitting is used to avoid metal contact. 11 is a resin-made damping piece 30 attached. When the lid side metal fitting 13 is raised as shown by the arrow A, the damping piece 30 comes into contact with the inclined surface 13b of the lid side metal fitting 13, and further descends relatively along the inclined surface 13b. Is elastically deformed to the right side of the figure as shown by the broken line arrow B. Similar to the embodiment shown in FIG. 1, the presence of the damping piece 30 makes it possible to avoid direct metal contact between the metal fittings 11 and 13. In the illustrated example, the damping piece 30 is attached to the box-side metal fitting 11 after the lower right side of the damping piece 30 is fitted to the lower side of the box-side metal fitting 11 and then rotated counterclockwise so that the boss on the back surface is attached. 30a is inserted into a hole provided in the box side metal fitting 11 and fixed. However, this fixing method is arbitrary. For example, a cavity corresponding to the cross section of the box side metal fitting 11 is provided in the damping piece 30 in the direction perpendicular to the drawing, and this is inserted by sliding movement from the side surface of the box side metal fitting 11 Other correspondences are possible.

  FIG. 3C shows still another embodiment. Here, the entire lid side metal fitting 42 is made of resin, and an inclined surface 42b is formed on the arm portion thereof. Thereby, even if the box side metal fitting 11 remains a metal like FIG. 1 etc., the metal contact between both metal fittings can be avoided. At this time, the resin material of the lid side metal fitting 42 is selected to have sufficient strength as a hinge and tough to withstand elastic deformation, and the plate thickness, shape, etc. are also different from metal. Response is desired. However, since extreme strength is not required for the lid opening / closing hinge of the console box, the resin construction of the hinge structure is relatively easy. Depending on the material, it is possible to obtain merits such as eliminating the bearing member (reference numeral 54 in FIG. 4) to be interposed in the hinge pin. In the embodiment shown in FIG. 3C, the operation and the damping mechanism are the same as those in the other embodiments.

  In addition, in each form shown in FIG. 3, although the details are not mentioned about the inclined surfaces 13b and 42b, it is possible to divide the inclined surfaces into a plurality of inclined surfaces and vertical surfaces, and to arbitrarily select an inclination angle. This is the same as the embodiment shown in FIGS.

  In addition, although not shown in the drawings, the lid side metal fitting is a metal plate metal fitting 13 having an inclined surface 13b as shown in FIG. 3A, and the entire box side metal fitting is made of resin. Alternatively, both the box-side and lid-side metal fittings may be made of resin. In addition, although the names of “box side metal fittings”, “lid side metal fittings” and “metal fittings” are used, this means that it corresponds to “brackets” and is not necessarily limited to metal ones. There is no intention. Accordingly, in this specification, the concept of “metal fitting” includes those made of such a resin material.

  As mentioned above, although the embodiment of the hinge structure according to the present invention has been described, the present invention includes a console box having the hinge structure as well as the hinge structure having the damping mechanism according to each aspect shown in the embodiment. Is included. In addition, a method of giving a damping effect to the lid rotation operation using these hinge structures is also included. That is, this method is a damping method in which the lid pivoting operation is braked before reaching the fully open position when the lid of the lidded console box is opened, and is gradually applied to the lid side metal fitting of the hinge structure while reaching the fully open position. Is provided with an inclined surface that increases the amount of elastic deformation of the lid side metal fitting by the pushing force of the box side metal fitting in contact with the box side metal fitting, and rebounds corresponding to the elastic deformation amount of the lid side metal fitting. A damping method is characterized in that the rotational movement of the lid is braked using force.

  The hinge structure according to each embodiment described above is intended for a hinge structure in which the lid is always urged to the open position by a spring. However, the present invention is not limited to this and includes a spring. The present invention can be similarly applied to a hinge structure having no hinge. At that time, in a console box without a spring, the lid is rotated to the open position by human power, but since the braking force due to the damping effect described above acts from the front side of the fully open position, the lid by the user It will improve the feeling when opening. In addition, even if the user releases his hand in the vicinity to the fully open position, the lid is maintained at that position by the restraining force accompanying the elastic deformation of the hinge structure described above, thereby avoiding discomfort due to free fall of the lid. To do. In addition, since the lid is restrained at that position even in the fully opened position of the lid, the rattling of the lid is avoided, and the situation that the lid is unexpectedly closed is also achieved. This backlash avoidance effect can be obtained even in a hinge with a spring.

  The hinge structure provided with the damping mechanism according to the present invention, the console box provided with the hinge structure, and the damping method of the lid rotation operation according to the present invention include the hinge structure or the lidded console box provided with the hinge structure. The present invention can be widely used in industrial fields for manufacturing and selling, and industrial fields for manufacturing and selling vehicles equipped with console boxes.

10. 10. hinge structure; Box side metal fittings, 12. 12. Lid side bracket, Lid side metal fitting, 13b. An inclined part, 15. Hinge pin, 20. Damping piece, 21. First inclined surface, 22. Second inclined surface, 23. Vertical plane, 24. Apex, 25. Side, 26. Back, 27. Boss, 30. Damping piece, 30a. Boss, 42. Lid side metal fittings, 42b. Inclined surface.

Claims (6)

In the hinge structure of the console box including the box side metal fitting and the lid side metal fitting that rotatably connects the lid of the lidded console box to the box body,
The hinge structure includes a damping mechanism that brakes the rotational movement of the lid from the position before reaching the fully opened position during the lid opening operation,
The lid side metal fitting approaches and comes into contact with the box side metal fitting that moves relatively close to each other according to the lid opening operation, and the lid side metal fitting gradually becomes elastic by the pushing force of the box side metal fitting by further opening operation. Having an inclined surface to deform,
A hinge structure characterized in that the damping mechanism is constituted by a repulsive force accompanying elastic deformation of the lid side metal fitting and a frictional force between the box side metal fitting and the lid side metal fitting in contact with each other. .   The inclined surface is provided on the lid side metal fitting itself so as to face the box side metal fitting, or the inclined surface of the resin-made damping piece attached to the lid side metal fitting at a position facing the box side metal fitting. The hinge structure according to claim 1 or 2, wherein the hinge structure is any one of the above.   The hinge structure according to claim 1, wherein one or both of the box side metal fitting and the lid side metal fitting is made of a resin material.   The hinge structure according to any one of claims 1 to 3, wherein the hinge structure further includes a spring that constantly biases the lid toward the fully open position.   A lid-type console box having a hinge structure for pivotally connecting the lid to the box body side, wherein the hinge structure is the hinge structure according to any one of claims 1 to 4. Console box. When the lid of the lid-type console box is opened, in the damping method of the lid rotation operation that brakes the rotation operation of the lid before reaching the fully open position,
At the opposing surface of the box side metal fitting and the lid side metal fitting that move relatively close to each other when the lid is opened and closed, the box side metal fitting gradually approaches and comes into contact with the lid side metal fitting until it reaches the fully open position, and the box in the contact state. Provided with an inclined surface that increases the amount of elastic deformation of the lid side metal fitting by the pressing force of the side metal fitting, a repulsive force corresponding to the amount of elastic deformation of the lid side metal fitting, and a frictional force between the box side metal fitting and the lid side metal fitting A damping method characterized in that the rotational movement of the lid is braked using

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