JPH04161684A - Device for opening and closing rotary lid or the like - Google Patents

Abstract

PURPOSE:To absorb a shock surely at the final time of rotatably opening a rotary lid or the like by delaying an rotary operation with a shock absorber in which a piston slides in liquid filled in a cylinder. CONSTITUTION:When predetermined torque is applied to a rotary lid A rotated in the opening direction, the rotary lid A is successively opened against the frictional resistance due to O-rings 22, 23. Then, a ball member 54 attached to the tip of an operating rod 53 in a shock absorber 5 is moved in the direction of arrow. Since a tapered surface 41 of a cam member 4 is disposed inclined to diverge downward, the operating rod 53 is urged by the cam member 4 and slides in a cylinder 51 toward a a bottom wall 51b against a return spring 58. Since an O-ring 59 closes a groove 52b, oil 57 in the cylinder 51 moves through only an orifice 52a provided in a piston 52 to a liquid chamber at the accumulator 56 side so that the rotary lid A is opened slowly by dynamic pressure resistance and viscous resistance in the passage of the oil 57 through the orifice 52a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an opening/closing device for a rotary lid or the like, which is provided with a shock absorber for absorbing a falling impact caused by free rotation of a rotating object.

[Prior Art] In general, opening/closing lids of pianos, record players, balk pull computers, copy machines, and other office equipment, opening/closing lids of pianos, etc., toilet seats and toilet lids of Western-style toilets, etc., are generally supported at one end by a rotating shaft. At the same time, the other end is a free end and is provided so as to be rotatable in the vertical direction within a rotation angle range of about a quarter circle to about 120 degrees.

When closing such a rotating object, such as a toilet lid or a toilet seat of a Western-style toilet bowl, the lid or the like becomes a free-falling rotating object. At this time, if you do not close it with your hand until the end, there is an inconvenience that it will collide at the final point of the closing rotation, producing a large impact sound and causing damage.

In view of this inconvenience, rotary dampers having a structure in which the rotational torque is reduced by utilizing the viscous resistance of a liquid such as grease disposed in the gap between the double cylinders have been widely used.

[Problems to be Solved by the Invention] However, among the above-mentioned items, in the case of open/close type (folding type) personal computers such as so-called laptop computers, a display device is incorporated in the rotating lid that opens and closes. Because of this, it is heavy, and there is a problem in that it is not possible to exert a predetermined resistance force using grease or the like.

Moreover, since this type of personal computer is required to be small and lightweight, the damper must also be small and lightweight. However, if a damper using grease or a spring is used to exert a predetermined resistance force, the damper will also have to be large, which poses a problem that it cannot be applied to these personal computers and the like.

The present invention has been made to solve the above-mentioned problems, and is capable of exerting an appropriate braking force even when the rotary lid of an open/close type personal computer or the like has a predetermined weight, and is small and lightweight. It is an object of the present invention to provide an opening/closing device such as a rotating lid that does not increase the size or weight of the entire device such as an opening/closing type personal computer. In order to achieve the above purpose, the opening/closing device for a lid, etc. is connected to any fixed part via a rotating shaft, and is used for a rotating lid, etc. that can be opened and closed up and down within a predetermined rotation angle range. , a liquid resistance disposed on either the rotary lid, etc. or the immovable part such that the tip of the actuating rod protruding from the piston protrudes from one of the opposing walls of the rotary lid, etc. or the immovable part. a shock absorber comprising a tapered surface and a bearing portion for the rotating shaft, and the tapered surface has an inclination that widens toward the bottom so as to face the tip end of the operating rod of the shock absorber. and a cam member fixedly disposed on the rotary lid, etc., and when the rotary lid etc. is closed, the tip of the actuation iron of the shock absorber moves while coming into contact with the tapered surface of the cam member, so that the piston is pressed. It is characterized in that it is provided so that it slides in the liquid, thereby slowing down the closing operation of a rotary lid, etc.

[Example] Hereinafter, the present invention will be explained in more detail based on the example shown in the drawings.

In the figure, reference numeral 1 denotes an opening/closing device such as a rotary lid according to this embodiment applied to an opening/closing type personal computer, and is constituted by rotating shafts 2, 3, a cam member 4, a shock absorber 5, and the like.

Note that A indicates a rotating lid of a retractable personal computer with a built-in display, and B indicates a main body, which is an immovable part, in which a CPU and a keyboard are incorporated.

A flange portion 21 is formed on one rotating shaft 2,
The flange portion 21 is locked to a cylindrical hollow portion 6 formed inside the base of the rotary MA, and is arranged to protrude from one end of the cylindrical hollow portion 6, that is, one side wall portion of the rotary lid A. ing. Further, the protruding portion of the rotating shaft 2 is inserted into a bearing portion 7 formed in the personal computer main body portion B. In addition,
Reference numeral 22 and 23 are O-rings installed around the rotating shaft 2, and when the rotating cover A is opened at a predetermined angle or more, the rotating cover A
Acts as a friction damper that locks the material in place.

The other rotating shaft 3 is fixedly disposed within the cylindrical hollow part 6 of the rotary lid A, and is fixedly supported by an angle member 8, and is attached to the other end of the cylindrical hollow part 6, that is, the rotary lid. It is arranged so as to protrude from the other side wall portion of A. Also,
The protruding portion of the other rotating shaft 3 is inserted into a bearing portion 41 formed in a cam member 4, which will be described later, and which is incorporated into the main body portion B so as to be freely rotatable therein.

As shown in FIGS. 4(a) and 4(b), the cam member 4 is formed in a substantially cylindrical shape, and is formed with a negative surface 41 tapered, and is opened at this tapered surface 41. It has a bearing portion 42 provided as shown in FIG. Further, this tapered surface 41 is formed in an inclined manner so as to gradually widen at the bottom portion, and a mounting hole 43 is provided at the lower part of the cam member 4.

As shown in FIGS. 1 and 3, the cam member 4 is formed on the main body B so that the tapered surface 41 faces the side wall of the rotary lid A. The mounting member 43 is fixedly installed in the recessed portion 9 by engaging with an engaging convex portion 9a that projects from a part of the recessed portion 9. Therefore, as shown in FIG. 1, the cam member 4 is disposed such that the higher the tapered surface 41, the greater the relative distance from the shock absorber 5, which will be described later.

In addition, near the upper part of this cam member 4, that is, the rotary lid A
When the shock absorber 5 (described later) is opened approximately 90 degrees,
If a recess (not shown) is formed in the part where the tip of the actuating rod 53 comes into contact, the ball member 54 at the tip of the actuating rod 53 and the recess will fit together, and the rotary lid A will be placed in a predetermined position. It can be securely locked.

As shown in FIG. 1, the shock absorber 5 is fixed to the above-mentioned angle member 8 by screwing into the hole, and the tip of the operating rod 53 protrudes from the cylindrical hollow part of the rotary lid A to connect to the cam member. The rotating shaft 3 is disposed adjacent to the other rotating shaft 3 so as to be in contact with the tapered surface 41 of the rotating shaft 3 .

This shock absorber 5 may be of any type as long as it can absorb shock by sliding a piston inside a cylinder filled with liquid.
Those shown in Figures (a) and (b) can be used.

The shock absorber 5 includes a cylinder 51 having a cylindrical shape with a bottom and a female screw portion 51a that is screwed into the angle member 8, a piston 52 that is disposed to freely slide within the cylinder 51, and a piston 52 that is slidably disposed within the cylinder 51. an actuating rod 53 that is provided to protrude from the piston 52 and protrude outward from an opening at one end of the cylinder 51; a ball member 54 that is attached to the tip of the actuating rod 53; an accumulator 56 fixed at an appropriate position within the cylinder 51;
1, and a return spring 58 disposed between the piston 52 and the bottom wall portion 51b of the cylinder 51.

Note that 52a is an orifice bored in the piston 52;
52b and 52c are grooves carved in the peripheral wall of the piston 52. Further, 59 is an O-ring inserted around the piston 52, and when the piston 52 is pressed, the bottom wall 51b
When moving in the direction, the orifice 52b is closed and the oil 57 is allowed to pass only through the orifice 52a to exert liquid resistance. On the other hand, when the piston 52 moves in the opposite direction, the groove 52b is opened by the flow pressure of the liquid, and the oil 57 stored in the accumulator 56 is transferred to the orifice 52a.
Not only the groove portion 52b.

52c and can be moved to the liquid chamber on the opposite side.

The opening/closing device for a rotary lid or the like of this embodiment operates as follows.

First, the case where the rotary lid A is closed from an open state will be described.

FIGS. 1 to 3 show a state in which the rotary lid A is opened approximately 90 degrees. In this position, the shock absorber 5
The ball member 54 attached to the tip of the operating rod 53 is
It is in contact with the upper portion of the tapered surface 41 of the cam member 4 .

In this state, if the opening angle to the rotary lid is slightly adjusted, for example within the range of angle θ as shown in FIG. .23 functions as a friction damper and can stop the rotary lid A at an arbitrary angle.

On the other hand, when the rotary lid A is rotated in the closing direction and a predetermined torque is applied, against the frictional resistance caused by the O-rings 22 and 23,
The rotation HA gradually closes.

At this time, the ball member 54 attached to the tip of the operating rod 53 of the shock absorber 5 moves in the direction of the arrow shown in FIG. Here, since the tapered surface 41 of the cam member 4 is arranged so as to be inclined so as to widen toward the bottom, the actuating rod 53 is pressed by the cam member 4, and the return spring is applied inside the cylinder 51. 58 and slides toward the bottom wall 51b.

As a result, the oil 57 disposed inside the cylinder 51 is
The O-ring 59 closes the groove 52b so that the accumulator 5 passes only through the orifice 52a provided in the piston 52.
The oil 57 moves to the liquid chamber on the 6 side, and the oil 57 enters the orifice 52.
Due to dynamic pressure resistance and viscous resistance when passing through a, the rotary lid A
will close slowly.

When the rotary lid A is opened, the tip ball member 54 of the operating rod 53 moves on the tapered surface 41 of the cam member 4 in the opposite direction to the above, so that the piston 52 is returned by the return spring 58.

At this time, the O-ring 59 opens the groove 52b due to fluid pressure, so the oil 57 flows into the orifice 52a.

The liquid flows into the liquid chamber on the cylinder bottom wall 51b side through the grooves 52b and 52c, and the rotary lid A is opened smoothly without any liquid resistance.

Note that the opening/closing device of the present invention, such as a rotary lid, is not limited to the above-described embodiments. For example, in the embodiment described above, the shock absorber 5 is attached to the rotary lid A, and the cam member 4 is attached to the rotary lid A.
Although an example has been shown in which the shock absorber 5 is embedded in the main body part B, the structure may be reversed, that is, the shock absorber 5 is embedded in the main body part B and the cam member 4 is embedded in the rotary lid A. Similarly, the rotating shaft 2.3 may be disposed so as to protrude from the wall portion of the main body B that faces the side wall portion of the rotary lid A.

[Effect of the invention J] According to the opening/closing device for a rotary lid or the like of the present invention, even if the lid is heavy and a large torque is applied during closing rotation, the piston can move through the liquid filled in the cylinder. Since the structure is such that the rotational movement is delayed by a sliding shock absorber, it is possible to reliably absorb the impact, etc. at the final time of the closing rotation of the rotary lid, etc.

In addition, since the piston slides in the axial direction to absorb shock, even a small device can exert a large amount of resistance, and is particularly suitable as an opening/closing device for an opening/closing type personal computer or the like.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the opening/closing device such as a rotary lid of the present invention applied to an opening/closing type personal computer, and Fig. 2 is a sectional view showing an embodiment of the opening/closing device such as a rotating lid of the present invention applied to an opening/closing type personal computer.
3 is a view taken along the line 1m - A side view of the member, and FIG. 5(a) is a sectional view showing the shock absorber used in the same example.
Figure (b) is a perspective view showing a piston used in the shock absorber. ■・−・−・Opening/closing device 2.3−・Rotating shaft 4・・・Cam member 5・・・Shock absorber

Claims (1)

[Scope of Claims] An opening/closing device used for a rotating lid, etc., which is connected to an arbitrary fixed part via a rotating shaft and opens and closes up and down within a predetermined rotation angle range, comprising: A shock absorber that utilizes the resistance of a liquid and is arranged such that the tip of an operating rod protruding from the piston protrudes from one of the opposing walls of the rotary lid, etc. or the stationary part. and a cam having a tapered surface and a bearing portion for the rotating shaft, and fixedly disposed such that the tapered surface faces the tip of the operating rod of the shock absorber and has an inclination that widens toward the bottom. a member, when the rotary lid etc. is closed, the tip of the operating rod of the shock absorber moves while coming into contact with the tapered surface of the cam member, thereby pressing the piston and sliding in the liquid. An opening/closing device for a rotary lid, etc., characterized in that the closing operation of the rotary lid, etc. is slowed down.