JP3071428B1 - Switchgear and retractable bed - Google Patents

Abstract

An open / close device that can solve problems such as breakage of a spring and enlargement of a device is provided. An opening / closing device for supporting a lid body so as to be openable and closable with respect to a container body, comprising: a first fixed link fixed to the container body;
0, a short link 22 whose middle portion is rotatably supported, a long link 24 whose middle portion is rotatably supported on the other side of the first fixed link 20, and fixed to the lid 16. A second fixed link 26 having one side rotatably connected to one side of the short link 22 and one side rotatably connected to the other side of the short link 22; One end is rotatably connected to the long link 24
And a gas spring 28 whose other end is rotatably connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening and closing device for assisting opening and closing of a lid of, for example, storage furniture, and an opening and closing bed using the opening and closing device.

[0002]

2. Description of the Related Art Conventionally, a lid on the top of storage furniture or the like is
There is known an opening / closing device for holding an open state and a closed state using a force of a spring or the like.

FIG. 5 is a view showing a conventional example of such an opening and closing device, and FIG. 5 (a) shows a state in which a lid is opened.
FIG. 5B shows a state in which the lid is closed.

[0004] In FIG.
The cover 102 is disposed so as to open and close freely with respect to a storage unit 100 such as storage furniture. Switchgear 104
The first fixed link 106 fixed to the side wall surface of the storage unit 100 and the lid 10
Short link 108 rotatably mounted on the closed side of 2
A long link 110 rotatably attached to the opening side of the lid 102 with respect to the first fixed link 106, and a distal end of the short link 108 and a long link 110 fixed to the lid 102 at both ends. It comprises a second fixed link 112 whose tip is rotatably mounted, and a tension spring 114 stretched between the short link 108 and the long link 110.

[0005] In the opening / closing device 104 configured as described above, when the lid 102 is open, the tension spring 11 is closed.
4, the lid 102 is held open by the force of pulling the short link 108 and the long link 110, and when the user pushes down the tip 102a of the lid 102 in the direction of arrow A, the lid 102 is closed as shown in FIG. It becomes a closed state as shown in (b). When the lid 102 is closed, the tension spring 114 is close to the rotation centers 106a and 106b of the short link 108 and the long link 110, so that a moment for rotating the short link 108 and the long link 110 is very large. It becomes smaller, and the lid 102 is kept closed by its own weight.

With such a configuration, the opening / closing device 104
Will exhibit an auxiliary function when the user opens and closes the lid 102.

[0007]

However, in the above-described conventional opening / closing device, if the tension of the tension spring 114 becomes zero when the lid 102 is fully opened,
Since the opened state of the cover 102 becomes unstable, the cover 10
Even when 2 is fully opened, it is necessary that the tension spring 114 is slightly extended so that the tension remains. However, when the tension spring 114 is set with the tension spring 114 slightly extended in this way, when the lid 102 is closed, the tension spring 1
14 is further extended, the difference between the free length and the maximum length of the spring is increased, and a very large load is applied to the tension spring 114. Therefore, conventionally, there has been a problem that the tension spring 114 may be damaged. This problem can be solved by enlarging the coil diameter of the tension spring 114 or increasing the free length. However, in such a case, another problem that the spring is enlarged to take up space and the space of the storage unit 100 is reduced. Occurs.

In order to solve this problem, a switching device using a gas spring instead of a tension spring has been proposed.

FIG. 6 is a view showing the structure of a conventional opening / closing device using a gas spring. FIG. 6 (a) shows a state where a lid is open, and FIG. 6 (b) shows a state where the lid is closed. It shows the state where it was turned on.

In FIG. 6, the opening / closing device 204 includes a first fixed link 206 fixed to the side wall surface of the storage section,
A short link 208 whose middle portion is rotatably supported on the closed side of the lid 102 with respect to the fixed link 206, and is rotatably mounted on the open side of the lid 102 with respect to the first fixed link 206. The long link 210 is fixed to the lid 102, and the distal end of the short link 208 and the long link 2
A second fixed link 212 having a tip end rotatably attached thereto, one end being rotatably attached to the first fixed link 206, and the other end being rotatably attached to a lower end of the short link 208. And a gas spring 214.

The gas spring is configured to generate a spring force by the pressure of the compressible gas, so that the spring constant is small and an excessive force is not applied even if the stroke is slightly increased, so that the gas spring may be damaged. Don't worry.

However, in the configuration of the opening / closing device shown in FIG. 6, even when a gas spring is used, a large moment is generated when the lid 102 becomes large and heavy as shown in FIG. Length M below 208
Needs to be lengthened, and with it the gas spring 2
14 also had to use the thing with a large stroke, and there existed a problem that a device became large.

Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to use an opening / closing device and a switching device capable of solving problems such as breakage of a spring and enlargement of a device. It is to provide a retractable bed.

[0014]

Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the object, an opening and closing device according to the present invention is an opening and closing device for supporting a lid body so as to be able to open and close with respect to a container body, and a first fixed link fixed to the container body, A short link rotatably supported at an intermediate portion on one side of the first fixed link; a long link rotatably supported at an intermediate portion on the other side of the first fixed link; A second fixed link fixed to the body, one side of which is rotatably connected to one side of the short link and the other side rotatably connected to one side of the long link, and the other side of the short link A gas spring having one end rotatably connected to the other end of the long link, and the other end rotatably connected to the other end of the long link, supported by the first fixed link of the short link. From the point where the gas spring is connected Up to the length, and the length of the first from the point supported by the fixed link to the point that the gas spring is connected to the long link is characterized in that substantially equal.

[0015]

Further, in the opening / closing device according to the present invention, the short link and / or the long link to which the gas spring is connected are bent in directions approaching each other.

[0017] Further, an opening and closing bed according to the present invention is characterized by using the above opening and closing device.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 are views showing a use form of an opening / closing device 10 according to an embodiment of the present invention. FIG. 1 shows a state where a lid is opened, and FIG. 2 shows a state where the lid is closed. The state is shown.

As shown in FIGS. 1 and 2, the opening / closing device 10 according to one embodiment is used, for example, in a bed 12 configured to be able to store articles therein. The auxiliary function when opening and closing the lid 16 is exhibited. That is, the lid 16 is moved by the urging force of the gas spring 28 disposed in the
In the open state, the lid 16 is held in the open position, and in the closed state, the weight of the lid 16 overcomes the urging force of the gas spring and is kept in the closed state.

When the user pushes up the lid 16 in the direction of arrow B from the state shown in FIG. 2, the lid 16 can be opened as shown in FIG. If the lid 16 is pushed down in the direction of arrow C, it can be closed as shown in FIG.

Next, FIG. 3 is a view showing the structure of the opening / closing device 10 of the present embodiment. FIG. 3 (a) shows a state in which the lid 16 is opened, and FIG. Indicates a closed state.

In FIG. 3, the opening / closing device 10 includes a storage unit 1.
4 (see FIG. 1), a first fixed link 20 fixed to the side wall surface, and a short link 22 whose intermediate portion is rotatably supported on the closed side of the lid 16 with respect to the first fixed link 20. A long link 24 having an intermediate portion rotatably supported on the opening side of the lid portion 16 with respect to the first fixed link 20; a distal end portion of the short link 22 fixed to the lid portion 16 at both ends; 2
4 has a second fixed link 26 rotatably mounted at one end thereof, one end rotatably mounted at the lower end of short link 22, and the other end rotatably mounted at the lower end of long link 24. And a gas spring 28 provided. 3A, a stopper pin 30 for preventing the lid 16 from being excessively opened is attached to the end of the second fixed link 26. As shown in FIG.

In the opening and closing device 10 configured as described above,
When the lid 16 is opened as shown in FIG. 3A, the moment when the short link 22 is rotated clockwise by the urging force of the gas spring 28 and the long link 24 are moved. Since a moment is generated to rotate the cover 16 in the counterclockwise direction, the lid 16 is kept open. The magnitude of the moment generated at this time is
A length M1 below the rotation center 20a of the short link 22 (hereinafter referred to as the arm length of the short link), a length M2 below the rotation center 20b of the long link 24 (hereinafter referred to as the arm length of the long link), and gas It is proportional to the biasing force of the spring 28. In addition, even when the lid 16 is fully opened, the biasing force of the gas spring 28 works to stabilize the open state of the lid 16, so that the gas spring 28 is substantially extended as shown in FIG. Even in the retracted state, the required biasing force is exerted by slightly shrinking due to the characteristics of the gas spring.

When the user pushes down the lid 16 in the direction of arrow C from the open state shown in FIG. 3A, the lid 16 is closed as shown in FIG. 3B. When the lid 16 is closed, the gas spring 28 approaches the rotation centers 20a and 20b of the short link 22 and the long link 24, so that the moment for opening the lid 16 is reduced. It is kept closed by its own weight.

In the closing operation of the lid 16, if the short link 22 rotates by θ1 and the long link 24 rotates by θ2 before the lid 16 changes from the open state to the closed state, as shown in FIG. As shown in (b), the end 28a on the short link side of the gas spring 28 moves rightward in the drawing by approximately M1 · θ1, and the end 28b on the long link side of the gas spring 28 moves substantially M2 · Move rightward in the figure by θ2. That is, the stroke of the gas spring 28 required until the lid 16 is changed from the open state to the closed state is substantially (M1θθ1-M2 ・ θ2). Here, for example, if the arm length M1 of the short link and the arm length M2 of the long link are set to be substantially the same length (here, for example, M), the stroke of the gas spring 28 becomes approximately M · (θ1− θ2), and if the difference between the rotation angle θ1 of the short link and the rotation angle θ2 of the long link is small, the stroke required for the gas spring 28 becomes very small. That is, according to the structure of the present embodiment, as shown in FIG. 6, a conventional structure that requires a gas spring stroke of approximately (arm length M3 of short link) × (rotation angle θ3 of short link) is required. In comparison, the stroke required for the gas spring is extremely small, and a small gas spring can be used. Thus, in the present embodiment, the size of the opening / closing device can be reduced.

In the above description, the arm length M1 of the short link 22 and the arm length M2 of the long link 24 are substantially the same. However, the rotation angle of the short link and the long link, When the design is optimized according to the ratio of the entire length of the long link and the like and the stroke of the gas spring is minimized, the arm length of the short link 22 and the long link 24 are not necessarily the same, but may be various lengths. It can be. Therefore, the present invention is not limited to the short link and the long link having substantially the same arm length.

When the lid 16 is heavy, it is necessary to increase the arm lengths of the short link 22 and the long link 24. Since the stroke of the spring may be a stroke according to the difference between the rotation angle of the short link and the rotation angle of the long link, the increase in the stroke of the gas spring is extremely small, and the opening and closing device is prevented from becoming large. Can be. Alternatively, by shortening the length of the short link 22 and the long link 24 above the rotation centers 20a and 20b in FIG. 3, it is possible to cope with a heavy lid without increasing the size of the apparatus. .

In the structure shown in FIG. 3, if the arm length of the short link and the long link is increased as the weight of the lid 16 increases, the gas spring also needs to have a long natural length. If the long link and / or the short link are formed in a boomerang shape as shown, a gas spring having a short natural length can be used. Accordingly, it is possible to use a common gas spring regardless of whether the weight of the lid 16 is small or large.

As described above, according to the above embodiment, the short link and the long link are made to protrude below the first fixed link, and the gas spring is arranged between the distal ends thereof. It is possible to reduce the size of the device by reducing the stroke of the spring.

In the above description, the case where the opening / closing device is used for opening / closing the lid of the bed has been described. However, the present invention is not limited to this, and may be applied to opening / closing the lid of various containers. Is possible.

[0032]

As described above, according to the present invention,
There is provided an opening / closing device which solves problems such as breakage of a spring and enlargement of a device.

[Brief description of the drawings]

FIG. 1 is a diagram showing a use mode of an opening / closing device according to an embodiment.

FIG. 2 is a diagram illustrating a usage pattern of the opening / closing device according to the embodiment;

FIG. 3 is a diagram illustrating a structure of the opening / closing device according to the embodiment;

FIG. 4 is a view showing a structure of a modification of the opening / closing device of one embodiment.

FIG. 5 is a diagram showing a conventional example.

FIG. 6 is a diagram showing a conventional example.

FIG. 7 is a diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Opening-closing device 12 Bed 14 Storage part 16 Lid 20 20 1st fixed link 22 short link 24 long link 26 2nd fixed link 28 gas spring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 43/14-43/24 A47C 17/54 F16H 21/10 F16H 21/44

Claims (3)

(57) [Claims] 1. An opening / closing device for supporting a lid body to be able to open and close with respect to a container body, comprising: a first fixed link fixed to the container body; and a first fixed link on one side of the first fixed link. A short link rotatably supported at an intermediate portion; a long link rotatably supported at an intermediate portion on the other side of the first fixed link; fixed to the lid body; A second fixed link in which one side of the short link is rotatably connected and one side of the long link is rotatably connected to the other side; and one end is rotatably connected to the other side of the short link. , on the other side of the long link, and a gas spring which has the other end portion is rotatably connected, it is supported by the first fixed link of the short link
Length from point to the point where the gas spring is connected
And supported by the first fixed link of the long link
To the point where the gas spring is connected.
A switchgear, characterized in that the length is substantially equal . 2. The switchgear according to claim 1, wherein the side of the short link and / or the long link to which the gas spring is connected is bent in a direction approaching each other. 3. An opening / closing bed using the opening / closing device according to claim 1 or 2 .