JP3152121B2 - Door opening and closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door opening / closing device for audio equipment and the like.

[0002]

2. Description of the Related Art In recent years, as the number of signal recording media, especially compact discs, etc. held by users has increased dramatically in products such as audio equipment, there has been a demand for a reproducing apparatus capable of storing a larger number of discs. . In such a playback device, it is necessary to make full use of the front portion of the device in order to secure a storage space for a large number of disks, and as a result, a structure in which the front operation panel is divided and opened and closed may be adopted. .

An example of the above-described conventional door opening / closing device will be described below with reference to the drawings.

FIGS. 5 and 6 show a conventional door opening / closing device. FIG. 5 is a perspective view of the conventional door opening and closing device when fully opened,
FIG. 6 is a side view of the device during opening and closing. 5 and 6
1 is a panel, 2 is a grill, 3 is a stay, 4 is a grill cover, 5 is a rear panel, and panel 1 is a grill 2
Is supported by the panel bearing 1a and the rear panel 5 so as to be rotatable with respect to the grill 2. The stay 3 is rotatably mounted on a rotation shaft 5a of the rear panel 5, and the one guide groove 3b is slidably mounted on a shaft 4a of a grill cover 4 fixed to the grill 2 by a claw portion 4b. The stay 3 slides with respect to the cover shaft 4a in accordance with the rotational movement of the panel 1, and when the panel 1 is fully opened as shown in FIG.
To support the load on FIG. 6 is a side view of the device in the middle of opening and closing. The inner dimension of the guide groove 3b of the stay 3 is set slightly larger than the outer diameter of the cover shaft 4a from the closed state of the panel 1 to the position A. The inner dimension of the sliding portion 3e indicated by a broken line from the position A to the fully opened position is set slightly smaller than the outer diameter of the cover shaft 4a. Therefore, the panel 1 rotates smoothly from the closed state to the position A, and from the position A to the fully opened position, the cover shaft 4a pushes the resin stay 3 by the sliding portion 3e to reduce the elastic deformation of the resin molded product. When a frictional force is generated between the cover shaft 4a and the sliding portion 3e, the panel 1
As a result, the rotational force due to its own weight is suppressed, so that the impact at the time of full opening can be buffered.

[0005]

However, in the above-mentioned conventional door opening / closing device, the frictional force required between the sliding groove of the support portion and the support shaft of the door fixing portion is all the support portion. This is caused by the elastic deformation of the resin molded product. For this reason, firstly, there is a problem that a stable frictional force cannot be obtained because the elastic deformation of the resin molded product is very susceptible to an ambient temperature change. Secondly, when the opening / closing operation is stopped in the middle of the sliding groove of the support portion and left for a long time, the sliding groove of the support portion is kept widened by the support shaft of the door fixing portion, As a result of the sliding groove of the creep deformation causing the elastic deformation force to decrease significantly, the friction force decreases,
Third, there was a problem that the expected frictional force could not be obtained, and thirdly, the repetition of opening and closing caused creep deformation of the sliding groove of the support portion as described above, resulting in a decrease in elastic deformation force. For this reason, it is inevitable that the quality of the opening / closing operation is deteriorated due to a decrease in the frictional force, or the frictional force is limited to a very high frictional force.

In view of the above-mentioned conventional problems, the present invention generates a stable frictional force between the sliding groove of the support portion and the support shaft of the door fixing portion, and cancels the rotation of the door when the door is rotated. The purpose of the present invention is to provide a door opening / closing device characterized in that the door opening / closing device can be controlled and shock can be absorbed when the door is fully opened.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a door opening and closing device according to the present invention comprises a door which is rotatable via a rotating support shaft at a door fixing portion, and which supports the door when the door is fully opened. A support portion, which is rotatably mounted on a support shaft of the door, and is formed of a resin molded product having a support shaft of a door fixing portion and a sliding groove having an inner dimension smaller than the outer diameter of the support shaft; The sliding groove of the support portion has an elastic body that undergoes shape deformation caused by the passage of the support shaft of the door fixing portion when the door is rotated, and the elastic groove of the support portion is generated by causing elastic deformation of the elastic body. A constant frictional force is generated between the door and the support shaft of the door fixing portion, thereby enabling the control of the rotation speed by offsetting the door weight when the door rotates and the shock absorption when the door is fully opened. is there.

[0008]

According to the present invention, the sliding groove of the support portion and the support shaft of the door fixing portion are used to control the rotation speed by canceling the door weight when the door rotates and to obtain an impact buffer when the door is fully opened. The following problem peculiar to the resin elastic deformation can be solved by generating the elastic deformation of the elastic body such as the wire spring without depending on the frictional force required for the elastic portion of the supporting portion, regardless of the resin elastic deformation of the support portion. . That is, in the conventional configuration, firstly, there is a problem that a stable frictional force cannot be obtained because the elastic deformation of the resin molded product is very susceptible to the influence of the ambient temperature change. If the opening / closing operation is stopped in the middle of the groove and left for a long period of time, the sliding groove of the support section will be pushed and expanded by the support shaft of the door fixing section, and the sliding groove of the support section will cause creep deformation. As a result, the elastic deformation force is remarkably reduced. As a result, the frictional force is reduced, and the expected frictional force cannot be obtained. Thirdly, by repeating the opening and closing, the sliding groove of the supporting portion undergoes creep deformation as described above. Although there was a problem that the elastic deformation force was lowered due to the occurrence, the resin elastic deformation was minimized by providing a slit in the resin support portion as in the present invention, and by incorporating an elastic body such as a wire spring. Tree of elastic deformation Extremely simple configuration without significant cost increase, with the problem that elastic deformation force changes due to temperature characteristics and creep deformation peculiar to resin elastic deformation and frictional force change can be made with little dependence on elastic deformation. Is the solution.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the door opening / closing device according to the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a perspective view of the door opening / closing device of the present invention when it is fully opened, FIG. 2 is a side view of the device in a closed state, FIG. 3 is a side view of the device during opening / closing, and FIG. It is a side view of a fully open state. In FIG. 1, 1 is a panel, 2 is a grill,
Reference numeral 3 denotes a stay, 4 denotes a grill cover, and 5 denotes a rear panel. The panel 1 is rotatably attached to the grill 2 by supporting a rotating shaft 2a of the grill 2 with a panel bearing 1a and a rear panel 5. The stay 3 is rotatably mounted on a rotating shaft 5a of the rear panel 5, and one guide groove 3b is slidably mounted on a shaft 4a of a grill cover 4 fixed to the grill 2 by a claw portion 4b. , Panel 1
The stay 3 performs a sliding movement with respect to the cover shaft 4a in accordance with the rotational movement of the cover 1, and supports the load applied to the panel 1 when the panel 1 is fully opened as shown in FIG. At the end of the stay 3 on the side of the grill 2, a stay spring 6, which is a metal wire spring, is held down by a claw of a spring fixing portion 3 d and incorporated. FIG. 2 is a side view of the device in a closed state, and FIG. 3 is a side view of the device during opening and closing. The inner dimension of the guide groove 3b of the stay 3 is
The outer diameter of the cover shaft 4a is set slightly larger than the outer diameter of the cover shaft 4a from the closed state of the panel 1 to the position A. On the contrary, the inner size of the sliding portion 3e indicated by the broken line from the A position to the fully open position is the outer diameter of the cover shaft 4a. It is set slightly smaller. In addition, grill 2 of stay 3
The guide groove 3b is freely deformed by providing a slit 3c at the end on the side, and further configured so as to bias the stay spring 6 in a direction in which the inner dimension of the guide groove 3b decreases. It is held down by the claws of the spring fixing portion 3d and incorporated. Therefore, the panel 1 is moved from the closed state to A
The cover shaft 4a rotates smoothly up to the position, and the cover shaft 4a expands the groove of the stay 3 with the sliding portion 3e from the position A to the fully opened position, thereby expanding the sliding portion 3e. A frictional force is generated between the sliding portion 3e. By the action of this frictional force, the panel 1 cancels its own weight by canceling out the frictional force.
Control of the rotation speed and shock absorption at the time of full opening.

[0011]

As described above, according to the present invention, the door is rotatably mounted on the door fixing portion via the rotary support shaft, and is rotatably mounted on the door support shaft for supporting the door when the door is fully opened. ,
And a support portion made of a resin molded product having a support shaft for the door fixing portion and a sliding groove having an inner dimension smaller than the outer diameter of the support shaft; and the sliding groove of the support portion when the door rotates in the support portion. By having an elastic body undergoing shape deformation caused by the passage of the fixed part through the support shaft, by causing elastic deformation of the elastic body,
A constant frictional force is generated between the sliding groove of the support portion and the support shaft of the door fixing portion, and the rotation speed can be controlled by canceling the door weight when the door rotates, and the shock can be buffered when the door is fully opened. This is a problem peculiar to the resin elastic deformation in the conventional configuration, and a problem that a stable frictional force cannot be obtained because the elastic deformation of the first resin molded product is very susceptible to an ambient temperature change. In addition, when the opening / closing operation is stopped in the middle of the sliding groove of the second supporting portion, and the sliding groove of the supporting portion is left open for a long time, the sliding groove of the supporting portion remains expanded by the supporting shaft of the door fixing portion, As a result, the sliding groove of the support part undergoes creep deformation and the elastic deformation force is significantly reduced.
For the problems that the expected frictional force could not be obtained, and for the problems that the sliding groove of the support portion caused creep deformation and reduced elastic deformation force as described above due to the repetition of the third opening and closing, Eliminating resin elastic deformation as much as possible by providing a slit in the resin support portion as in the invention, and incorporating an elastic body such as a wire spring makes it possible to generate elastic deformation almost without relying on resin elastic deformation. Therefore, the problem that the elastic deformation force changes due to the temperature characteristic or creep deformation peculiar to the resin elastic deformation and the frictional force changes, is solved by a very simple configuration without a large increase in cost.

[Brief description of the drawings]

FIG. 1 is a perspective view of a door opening and closing device according to an embodiment of the present invention when it is fully opened.

FIG. 2 is a side view of the door opening and closing device in a closed state.

FIG. 3 is a side view of the door opening and closing device during opening and closing;

FIG. 4 is a side view of the door opening and closing device in a fully opened state.

FIG. 5 is a perspective view of a conventional door opening and closing device when fully opened.

FIG. 6 is a side view of the door opening and closing device during opening and closing;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel 1a Panel bearing 2 Grill 2a Rotating shaft 3 Stay 3a Stay bearing 3b Guide groove 3c Slit 3d Spring fixing part 3e Sliding part 4 Grill cover 4a Cover shaft 4b Claw part 5 Rear panel 5a Rotating shaft 6 Stay spring

Claims (1)

(57) [Claims] 1. A door which is rotatable on a door fixing part via a rotation support shaft, and a support shaft for the door fixing part which is rotatably mounted on a door support shaft for supporting the door when the door is fully opened. And a supporting portion made of a resin molded product having a sliding groove having an inner dimension smaller than the outer diameter of the supporting shaft, and the sliding groove of the supporting portion passes through the supporting shaft of the door fixing portion when the door rotates in the supporting portion. Having an elastic body subjected to the shape deformation generated by generating an elastic deformation of the elastic body, thereby generating a constant frictional force between the sliding groove of the support portion and the support shaft of the door fixing portion, A door opening and closing device characterized in that the door opening / closing device is capable of controlling a rotation speed by canceling a door weight when the door is rotated, and buffering an impact when the door is fully opened.