JP3011135B2 - Stay displacement speed suppression structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stay displacement speed suppressing structure capable of smoothly opening and closing a door of an electronic device.

[0002]

2. Description of the Related Art Conventionally, in an electronic device or the like having a panel opening / closing structure, a mechanical means or an electric means such as a hydraulic damper is provided in an opening / closing section to control an opening speed of an opening / closing panel or a door, and an opening / closing speed and an opening / closing amount. There is known a structure for improving safety when opening and closing a panel by controlling the panel.

FIG. 6 is a cross-sectional view showing a conventional device having a structure for controlling the opening speed of a door by electric means (Japanese Patent Laid-Open No. 59-88581). As shown in FIG. 1, this device is an electronic device such as an audio cassette tape recorder or a video cassette recorder, and has a door for an insertion member such as a cassette tape. The housing 100 of this device
Has an opening 101 into which a cassette tape or the like is inserted.
A door 102 that opens under its own weight is rotatably attached to the housing 100 so that the opening 101 of the housing can be opened and closed. In the housing 100, a control mechanism 110 for controlling the opening and closing speed of the door 102 is mechanically coupled to the door 102 and attached.

The control mechanism 110 includes a metal tube 111 fixed to the housing 100 and a metal rod (stay) 112 whose one end is rotatably connected to the door 102. It is inserted so that it can move in conjunction with. The end of the side plate of the metal body 113 having a U-shaped cross section is fixed to the inner surface of the metal tube 111, and an insertion hole through which the metal bar 112 is inserted is provided in the center plate of the metal body 113. A piezoelectric magnetic plate 115 is attached to each of a pair of side plates of the metal body 113, and the metal body 113 and the piezoelectric magnetic plate 115 constitute a bending vibration type displacement element.

This bending vibration type displacement element bends in the thickness direction of the piezoelectric magnetic plate by application of a voltage, and the position of the metal plate through which the metal bar 112 is inserted fluctuates.
The insertion opening through which the metal rod 12 is inserted comes into contact with the metal rod 112 to fix the metal rod 112. The protrusion 117 provided at the end of the metal bar 112 is used to switch the switch 118 when the door is completely closed.
To work. Further, the protrusion 119 attached to the front of the metal body 113 of the metal bar 112 operates the switch 120 when the door 102 is fully opened. further,
The metal bar 121 and the metal body 113 are mechanically connected by the protrusion 121 attached to the metal bar 112.

According to the control mechanism 110, when the closed door 102 is opened, the protrusion 11
7 presses the switch 118, whereby the lock fixing the door 102 is released, and the door 102 is opened by its own weight. At the same time when the projection 117 presses the switch 118, a pulse voltage is applied to the piezoelectric magnetic plate 115, and the bending vibration type displacement element vibrates. While the pulse voltage is being applied, the metal body 113
The door 102 is fixed at that position because it is holding the metal bar 112, and when no pulse voltage is applied, the door 102 opens by its own weight. When the door 102 is fully opened, the metal bar 11
The second protrusion 119 presses the switch 120, and the application of the pulse voltage is stopped. When closing the door 102, if the door 102 is pressed, the protrusion 117 presses the switch 118,
The door 102 is fixed in a closed state. in this way,
The control mechanism 110 controls the speed at which the door 102 opens under its own weight at the timing of application of the pulse voltage.

[0007]

However, the control of the opening speed of the opening / closing door by the above-mentioned electric means has a complicated structure, a large number of parts, and as a result, is heavy and structurally large. Since a mounting space is required, there is a problem that the size and weight of the electronic device are adversely affected. Also,
Similarly, when a damper or the like is used, there is a problem that the number of components is large and a large mounting space is required.

The present invention has been made in view of the above problems, and has a stay displacement speed suppressing structure capable of suppressing the opening / closing speed of an opening / closing door with a small and lightweight structure.
It is an object of the present invention to provide a switchgear using the same and a device provided with the switchgear.

[0009]

To achieve the above object, a stay displacement speed suppressing structure according to claim 1 is provided with an opening / closing door.
Insert the stay shaft attached to the
A bush having an insertion groove and being compressively deformable;
Has a bush holding groove for mounting a menu, and attaches to equipment
And a bush holding groove.
The opening of the groove for inserting the bush is located at the bottom of the bush holding groove.
The stay is mounted so as to be positioned on the surface side, and the displacement speed of the stay shaft is suppressed by the pressing force of the bush on the stay shaft .

[0010] According to the invention having such a configuration, since the bush, which is compressed and deformed and is mounted in the bush holding groove of the housing, applies a pressing force to the stay shaft, the frictional force between the bush and the stay shaft is used. The displacement speed of the stay shaft can be suppressed.

For this reason, the component parts are constituted by the stay shaft, a bush for pressing the stay shaft, and a housing on which the bush is mounted and which can be fixed to equipment, so that the number of components is small and the components are small. Because it can be made smaller, it can contribute to the reduction in size and weight of the device.

Further, since the bush are a structure so as to surround the stay shaft, it is possible to increase the contact area between the bushing and the stay shaft, frictional force between the bush and the stay axis effectively occur, the stay shaft It is possible to reliably suppress the displacement speed.

According to a second aspect of the present invention, there is provided a stay displacement speed suppressing structure for suppressing a displacement speed of the stay shaft due to its own weight of a component connected to one end of the stay shaft. According to the invention having such a configuration, when the stay shaft connected to, for example, the opening / closing door that descends by its own weight is displaced along with the opening operation of the opening / closing door, friction with the bush pressing the stay shaft is generated. Thus, the opening speed of the door due to its own weight is suppressed, and the door can be opened smoothly.

According to a third aspect of the present invention, there is provided a stay displacement speed suppressing structure in which an opening / closing door is connected to one end of the stay shaft, and the opening / closing speed of the opening / closing door is suppressed by a pressing force of the bush on the stay shaft. . According to the invention having such a configuration, for example, when the stay shaft connected to the opening / closing door that descends by its own weight is displaced along with the opening operation of the opening / closing door, friction with the bush pressing the stay shaft is generated. Thus, the opening speed of the door due to its own weight is suppressed, and the door can be opened smoothly.

For this reason, the components for suppressing the speed of the door are a stay shaft, a bush pressing the stay shaft,
Since the housing is provided with the bush and fixed to the equipment, the number of parts is small and the number of parts can be reduced, so that the equipment can be reduced in size and weight.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.

[0017] [First Embodiment] FIG. 1 is a perspective view showing an outline of such equipment and its opening and closing device of the present invention. FIG. 2A is a perspective view of a housing constituting a part of a stay suppressing mechanism according to the present invention.
2B is a perspective view of the bush, and FIG. 2C is a perspective view showing one embodiment of a stay suppressing mechanism. FIG.
FIG. 4 is a cross-sectional view illustrating a mechanism for suppressing a stay displacement speed.

An apparatus 1 shown in FIG . 1 is an electronic apparatus such as an audio cassette tape recorder or a video cassette recorder, and has an opening / closing panel (opening / closing door) for opening and closing an opening 3 for inserting a cassette tape or the like in a housing 2. ) 4 is provided. The open / close panel 4 is rotatably attached to the housing 2 by a hinge (not shown) or the like so as to open by its own weight.

Further, when the opening 3 of the housing 2 is closed, it is locked at that position. For example, the lock is released by pressing the open / close panel 4, and the open / close panel 4 is opened by its own weight. (Not shown).

A pair of displacement stays 10 are mounted on both sides of the inner surface of the opening / closing panel 4.
Numerals 0 are respectively connected to stay restraining mechanisms 20 attached to side walls in the housing 2.

The stay restraining mechanism 20 includes a housing 30 and a bush 40, as shown in FIG. As shown in FIGS. 2 (a) and 2 (c), the housing 30 has a substantially square thick plate shape, and a bush holding groove 31 having a Ω-shaped cross section whose inside is wider than the opening is provided at the center on one surface side. ing. Further, a stay shaft through hole 32 having a U-shaped cross section which is slightly shallower than the bush holding groove 31 is formed.
1 are provided through the housing 30 on both sides. Further, screw insertion holes 33 are provided above and below the bush holding groove 31 so as to penetrate the housing 30.

As shown in FIG. 3, the housing 30 has the opening of the bush holding groove 31 facing the housing 2, the bush holding groove 31 is oriented horizontally, and the screw insertion hole 33 is formed with two screws 50. Screwed to the housing 2 via The housing 30 is made of, for example, a resin such as an ABS resin or a polyethylene resin, or a metal such as stainless steel.

[0023] bush holding groove 31 of the housing 30, a cylindrical bush 40 having elasticity are attached. The bush 40 has a slightly larger diameter than the bush holding groove 31 and has substantially the same length. Therefore, bush 4
No. 0 is attached to the bush holding groove 31 after undergoing compression deformation. A bush 40 has a U-shaped stay shaft insertion groove 4
1 is provided through both ends of the bush 40.

[0024] The bushing 40 is compressed and deformed is required to have an appropriate elasticity it is necessary to press the variable stays 10, also taking into account the friction and wear resistance of the variable stays 10 For example, it is made of rubber such as natural rubber or synthetic rubber, or an elastic body such as plastic elastomer or plastic foam.

As shown in FIG. 2C, the variable stay 10 inserted into the stay shaft insertion groove 41 of the bush 40 connects the stay shaft 11 and one end of the stay shaft 11 to the opening / closing panel 4. And a crankshaft 12 connected thereto. The stay shaft 11 is slidably inserted in the stay shaft insertion groove 41 of the bush 40 in the front and rear direction (arrow X in FIG. 2) as the door 4 opens and closes.

A stopper 13 is provided at the other end of the stay shaft 11 to stop the opening operation of the open / close panel 4 by hitting the housing 30 when the open / close panel 4 is completely opened. The crankshaft 12 converts the rotation of the opening / closing panel 4 into a linear motion of the stay shaft 11. The crankshaft 12 is rotatably connected to the stay shaft 11 by a rotating unit 14, and is rotatable to the opening / closing panel 4 by a rotating unit 15. Are linked.

As shown in FIG. 3, the stay shaft 11 of the variable stay 10 is inserted into the stay shaft insertion groove 41 of the bush 40 which is mounted in the bush holding groove 31 of the housing 30 by being compressed and deformed. Sandwiched by Therefore, the stay shaft is the bush 4 which is compressed and deformed.
0 is pressed from above and below by the stay shaft insertion groove 41,
With the movement of the stay shaft 11, the stay shaft 11 and the bush 4
The frictional force is generated between the stay shaft insertion groove 41 and the inner surface of the stay shaft insertion groove 41.

[0028] Therefore, the diameter of the stay shaft 11, a degree slightly larger or equal to the width extent of the stay shaft inserting groove 41 of the bushing 40 that is not compressed and deformed. The diameter and material of the stay shaft 11 are considered so that a frictional force with the bush 40 is generated to such an extent that the opening speed of the opening / closing panel 4 due to its own weight can be suppressed. For example, the material may be a metal such as stainless steel or a resin such as nylon or polyethylene.

A description will now be given assembly procedure of the stay displacement speed suppressing structure according to the present invention. First, the bush 40
The stay shaft 11 of the variable stay 10 is inserted into the stay shaft insertion groove 41.
While the bush holding groove 3 of the housing 30 is inserted.
The bush 40 is compressed and deformed so that the opening of the stay shaft insertion groove 41 of the bush 40 is on the bottom side of the bush holding groove 31. As a result, the bush 40 has a larger diameter than the bush holding groove 31, so that the bush 40 is compressed and deformed in the bush holding groove 31.

Since the bush holding groove 31 has a cross-sectional structure in which the inside is wider than the opening, the bush 40 pushed into the bush holding groove 31 does not jump out. Further, since the bush holding groove 31 is larger in diameter than the stay shaft through hole 32, the bush 40 is held at both ends of the bush holding groove 31 and does not move in the front-rear direction, but is fixed in the bush holding groove. .

Next, the screw 50 is inserted from the opposite side of the bush holding groove 31 in the screw insertion hole, and screwed in, housing the housing 30 so that the opening of the bushing retaining groove 31 is in the housing 2 side Fix to body 2. As a result, the opening of the bush holding groove 31 is closed by the housing 2, so that the bush 40 is held in a state where the bush 40 is compressed and deformed.
Is stored in At the same time, the stay shaft 11 does not come out of the bush holding groove 31.

Further, attaching the rotating portion 15 of the crank shaft 12 of the variable stays 10 to the opening and closing panel 4, the variable stays 10
And the opening / closing panel 4 are connected. As a result, as shown in FIG. 1, as the opening and closing panel 4 rotatably attached to the housing 2 is opened and closed, the stay shaft 11 is
The inside of the stay shaft insertion groove 41 in the direction X of the stay shaft (FIG. 2)
(C)) The structure which slides can be obtained.

[0033] Next, the operation of the stay displacement speed suppressing structure of the structure. When the opening / closing panel 4 is closed, the opening / closing panel 4 is fixed with the opening 3 of the housing 2 closed by a lock mechanism (not shown). To open the open / close panel 4, the lock is released by, for example, pushing the open / close panel 4 with a finger. Then, the opening / closing panel 4 pops out, for example, by the action of a spring, and thereafter opens by its own weight. With the operation of the opening / closing panel 4, the stay shaft 11 moves forward along the axial direction X, and slides in the stay shaft insertion groove 41 of the bush 40.

At this time, the bush 4 which has been compressed and deformed
Since 0 presses the stay shaft 11, a frictional force is generated between the bush 40 and the stay shaft 11, whereby the displacement speed of the stay shaft 11 is suppressed, and the opening / closing panel 4 opens smoothly. When the opening and closing panel 4 is fully opened, the stopper 13 at the end of the stay shaft 11 hits the housing, and the opening operation of the opening and closing panel 4 is stopped. To close the opening / closing panel 4, if the opening / closing panel 4 is pushed up, a lock mechanism (not shown) is activated to hold the opening / closing panel 4 with the opening of the housing 2 closed.

[0035] Thus, the stay displacement rate suppressing structure according to the above embodiment, the weight of the closing panel 4, the degree of consideration of the occurrence of frictional force material selection and compression deformation of the bushing 40 of the stay shaft 11, the cross-section of the stay shaft The frictional force between the bush 40 and the stay shaft 11 is changed according to factors such as the shape and surface roughness, the relative relationship between the diameter of the stay shaft and the width of the stay shaft insertion groove of the bush, and the appropriate Opening and closing speed can be obtained.

According to the opening and closing device comprising a stay displacement speed suppressing structure according to the above embodiment, the bushing in the housing and the bushing and a simple stay suppression mechanism there is no moving parts due to hold by compressive deformation of the bushing, the opening speed of the opening and closing panel Can be easily and reliably suppressed by friction between the shaft and the stay shaft. As a result, it is possible to contribute to improvement in reliability by reducing the weight, size, cost, and failure rate of the device.

In the above embodiment, the stay insertion groove of the bush has a U-shaped cross section as shown in FIG. 4A, but the stay insertion groove 41a is formed as shown in FIG. It can be formed into a shape in which a stay 42 through which a stay shaft passes is inserted into the stay insertion groove 41a, or a horseshoe-shaped cross-section whose inside is wider than the opening as shown in FIG. With such a shape, the contact area between the stay shaft and the bush increases, and the displacement speed of the stay shaft can be more reliably suppressed.

Although the housing is fixed to the housing, the housing is rotatably mounted on the housing, and the stay shaft is directly rotatably connected to the opening / closing panel without the crankshaft of the displacement stay. Thus, the same operation as the operation in the above embodiment can be realized.

Further , in the above embodiment, the bush has a structure sandwiching the stay shaft. However, any structure may be used as long as the pressing force due to the compressive deformation of the bush is applied to the stay shaft. It may be arranged in the bush holding groove to apply a frictional force between the bush and the housing to the stay shaft.

[0040] Furthermore, not only the opening and closing of the cassette tape insertion slot, can be applied to opening and closing panel of any equipment.
Further, although the above-mentioned opening and closing door is configured to descend by its own weight, it can be applied to an opening and closing door configured to forcibly descend by the action of, for example, a spring.

[ Second Embodiment] In the present embodiment, a stay displacement speed suppression structure is applied to suppression of the descending speed of a descending object, and will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals.

In this stay displacement speed suppressing structure, a weight 70 as a descending object such as a balancer is attached to the lower end of the stay shaft 10a, and the descending speed of the weight 70 is determined by the frictional force between the bush and the stay shaft 10a. Suppress. The stay suppressing mechanism 20 is screwed to the housing 2 of the device in the same manner as described above, and the same housing 30 and bush 40 as described above are used.
The bush 40 is compressed and deformed in the bush holding groove 31 of the housing 30, and is stored in the housing 2 with the opening closed. Although not shown in FIG. 5, the stay shaft 1 is inserted into the stay shaft insertion groove 41 of the bush 40.
0a is pressed and inserted into the bush 40.

[0043] a description of the operation of this structure. First,
The lock mechanism supporting the weight 70 is released, and the weight 70 descends by its own weight. At the same time, the stay shaft 10a also descends and displaces as the weight 70 descends. At this time, a frictional force is generated between the stay shaft 10a and the bush 40. Thereby, the weight 7
The descent energy of 0 is converted to thermal energy due to friction between the bush 40 and the stay shaft 10a, and acts to expand the bush 40 and the stay shaft 10a. Suppress. Therefore, the lowering speed of the weight 70 can be suppressed by a simple mechanism of the combination of the bush 40 and the housing 30.

[0044] Also in this structure, it is possible to suppress the displacement speed of the stay shaft in a simple and few parts no moving parts, compact equipment with a lowering mechanism of such weight, weight reduction, contributing to cost reduction it can.

In this embodiment, the present invention can be applied not only to a rod-shaped stay shaft made of metal or resin, but also to a bendable stay shaft such as a rope.

[0046]

As described above, according to the stay displacement speed suppressing structure of the present invention, the stay displacement speed can be reliably suppressed with a small number of parts.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an opening / closing device according to an embodiment of the present invention.

FIGS. 2A to 2C are exploded perspective views showing components constituting a stay displacement speed suppressing structure according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state where the stay displacement speed suppressing structure of FIG. 2 is attached to a housing.

FIGS. 4A to 4C are cross-sectional views showing modified examples of stay shaft insertion grooves of a bush.

FIG. 5 is a perspective view showing another embodiment of the stay displacement speed suppressing structure according to the present invention.

FIG. 6 is a cross-sectional view showing a configuration of a conventional device for suppressing the opening speed of an opening / closing door by an electric method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic device 2 Housing 4 Opening / closing door 10 Displacement stay 11 Stay shaft 12 Crank shaft 13 Stopper 20 Stay suppressing mechanism 30 Housing 31 Bush holding groove 40 Bush 41 Stay shaft insertion groove

Claims (3)

(57) [Claims] 1. A stay shaft attached to an opening / closing door, and an insertion groove through which the stay shaft is inserted, which can be compressed and deformed.
A bush and a bush holding groove for mounting the bush;
And a housing attached to the bush, and the bush is inserted into the bush holding groove by opening the insertion groove.
So that the mouth is located on the bottom side of the bush holding groove.
Wear to the stay displacement speed suppressing structure, characterized in that to suppress the pressing force of the bush displacement speed for the stay axis of the stay shaft. 2. The stay displacement speed suppressing structure according to claim 1, wherein a displacement speed of said stay shaft due to its own weight of a component connected to one end side of said stay shaft is suppressed. Wherein connecting the door at one end of the stay shaft, according to claim 1, characterized in that to suppress the closing speed of the door by the pressing force of the bush with respect to the stay shaft
Or the stay displacement speed suppressing structure according to 2.