JPH05163867A - Damper device - Google Patents

Abstract

PURPOSE:To provide possibility of using an oil damper, reduce the height, and relieve restriction of the holddown dimension accuracy by furnishing a rack, which converts rotary motions into linear, and a locking mechanism having a cam. CONSTITUTION:In the direction of arrow A, a force is applied to a linear motion link 21 of such a constitution that a rack 22 is in engagement with a gear 5, and thereby a locking mechanism configured with a lock spring 30 and heart cam 28 is disengaged. When the force is removed, the linear motion link 21 is started moving in the direction of arrow C by a compression coil spring 23. At this time, a guide received by the inner side face of the link 21 and guide members 33, 34, and one end of the lock spring 30 makes guiding while gliding in a straight groove 29. When this end of lock spring 30 reaches the final point 29a of the heart cam 28, the locking is actuated by the heart cam 28 and lock spring 30. If the force is relieved when this condition is attained, the condition is restituted to the side elevation, and the link 21 is put in the locked condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper device suitable for application to, for example, a shielding door such as a video input terminal arranged on the lower side of a front panel of a television receiver.

[0002]

2. Description of the Related Art In recent television receivers, from the front side of the television receiver, the CRT tube surface and its C
Only the plastic frame that hides the four sides of the RT tube surface is visible. In this case, it is said that the narrower the width of the plastic frame that hides the four sides, the better the function and the design.

When viewed from the front side of the television receiver, a downward-opening thin door is integrally arranged in the frame on the lower side. When this door is opened, a channel selection switch, a volume increase / decrease switch, audio / video signal input / output terminals and the like are arranged therein. Therefore,
By closing the door, these channel selection switches are not obscured and are in the viewer's field of view.

In this case, regarding the opening / closing mechanism of this door,
Particularly, in advanced models, smooth opening and closing are required, and therefore a damper mechanism is adopted.

FIG. 7 shows a side structure of a door opening / closing mechanism according to the first conventional technique. The door opening / closing mechanism having the damper mechanism shown in FIG. 7 has a fan gear 3 that rotates integrally with the door 1 about a rotation shaft 2 of the door 1.
A gear 5 forming an oil damper unit 4 is meshed with the sector gear 3. A convex portion 6 forming a lock mechanism is formed at the upper end of the door 1, while a lock mechanism 7 having a concave portion that fits into the convex portion 6 is formed on the main body side of a television receiver (not shown). Is attached.

In the door opening / closing mechanism shown in FIG. 7, when the vicinity of the upper end of the door 1 is pushed in the direction of arrow A, the convex portion 6 is disengaged from the concave portion of the lock mechanism 7 or the force of a spring (not shown) The door 1 is rotated by its own weight in the direction of arrow B to open the door 1. At this time, the fan-shaped gear 3 and the oil damper unit 4
Due to the braking of the door 1, the door 1 will open gradually and gradually.

[0007]

By the way, the opening angle of the door 1 is usually 90 ° or more (90 ° + α) in order to ensure the operability of the switches and the like arranged inside the door 1. ) Angle is required.

However, in order to do so, the door 1
Although the dimension in the height direction of H is H, an extra height αH corresponding to the extra angle α is required (height becomes H + αH). For this reason, only the width of the frame on the lower side of the television receiver to which the door opening / closing mechanism is applied becomes wide, and there is a problem that the above-mentioned request for narrowing the width cannot be sufficiently met.

Therefore, in order to solve this problem, FIG.
As shown in, there is a door opening / closing mechanism using the air pot 8 as a damper mechanism. Note that, in FIG. 8, those corresponding to those shown in FIG. 7 are designated by the same reference numerals. In this door opening / closing mechanism, the door 1 and the air pot 8 are connected by a link mechanism 9. Even with this door opening and closing mechanism,
By pushing the vicinity of the upper end of the door 1 in the direction of arrow A, the lock mechanism 7 is disengaged, and the door 8 rotates in the direction of arrow B about the rotation axis 2 by the force of the spring (not shown) or the own weight of the door 1. Then the door 1 opens. At this time, due to the braking of the air pot 8, the door 1 will open gradually and gradually.

As can be seen from FIG. 8, in this door opening / closing mechanism, the height of the door 1 can be set to the height H.

However, in the door opening / closing mechanism of the example of FIG.
Since the dimension of the air pot 8 in the depth direction is relatively long, there is a problem that it is usually difficult to mount a printed circuit board (not shown) or the like arranged on the rear side of the air pot 8. Further, when foreign matter such as sand is mixed in the air pot 8 or when the lubricating oil in the air pot 8 is solidified, there is a problem that malfunction occurs. The oil damper unit 4 described above has a relatively high reliability in operation without causing problems such as inclusion of foreign matter and solidification of lubricating oil.

Further, in the door opening / closing mechanism shown in FIGS. 7 and 8, the lock mechanism 7 and the damper device (oil damper unit 4 or air pot 8) are the devices to which these door opening / closing mechanisms are applied, for example, Since the above-mentioned television receiver frame is used by being attached to another place in the frame, the dimension (attachment) accuracy of the lock mechanism 7, the damper device and the door 1 must be accurately maintained. There was also a limitation.

The present invention has been made in view of the above problems, and provides a damper device in which an oil damper can be used, the height of which is reduced, and the restriction of mounting dimensional accuracy can be loosened. The purpose is to do.

[0014]

The damper device of the present invention is
For example, as shown in FIG. 1, the rotary oil damper 4
And a rack 22 for converting the rotary motion of the rotary oil damper 4 into a linear motion, and lock mechanisms 28 and 30 having a cam 28 during the linear motion of the rack 22.

[0015]

According to the damper device of the present invention, the rack 22 for converting the rotary motion of the rotary oil damper 4 into the linear motion,
Since the rack 22 is provided with the lock mechanism portions 28 and 30 having the cam 28 during the linear movement of the rack 22, the oil damper can be used, the height can be reduced, and the limitation of the mounting dimension accuracy can be loosened. ..

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the damper device of the present invention will be described below with reference to the drawings. In the drawings referred to below, parts corresponding to those shown in FIGS. 7 and 8 described above are designated by the same reference numerals, and detailed description thereof will be omitted.

1A to 1C are schematic diagrams showing the construction of an embodiment of the damper device of the present invention and used for explaining the operation. 1A is a partial sectional side view, and FIG. 1B is a partial sectional plan view thereof. 1A and 1B, 20 is a substantially box-shaped base, and an oil damper unit 4 which is a rotary oil damper is screwed to the side surface of the base 20.
A rack 22 forming a linear motion link 21 is engaged with a gear 5 forming the oil damper unit 4. The linear motion link 21 is configured as shown in FIG. 1D. In FIG. 1D, a rack 22 (not shown in the drawing) is formed on the lower side.

The linear link 21 has a recess 24 in which a compression coil spring 23 is arranged. One end of the compression coil spring 23 is fixed to a pin 25 provided on the rear wall of the base 20, and the other end is fixed to the surface 26 of the recess 22.
Is hitting. Therefore, a force in the arrow C direction is applied to the linear motion link 21 by the compression coil spring 23. A groove 27 is provided on the upper surface of the linear motion link 21, and a so-called heart cam 28 is formed at the tip of the groove 27. A linear groove (hereinafter, referred to as a straight groove) 29 is formed on the rear side of the heart cam 28.

One end of a rod-shaped lock spring 30 relatively slides in the groove 27. The other end of the lock spring 30 is fixed to the upper front side of the base 20. It should be noted that one side surface portion of the linear motion link 21 is supported by the inner side surface 31 of the base 20, and the other side surface portion is guided by guide members 33, 34 formed on the base 20.

In the structure shown in FIGS. 1A and 1B, the linear link 2
When a force is applied to 1 in the direction of arrow A, the lock spring 30
The lock mechanism constituted by the heart cam 28 and the heart cam 28 is released from the locked state, and when the force applied in the arrow A direction is removed, the linear motion link 21 starts to move in the arrow C direction opposite to the arrow A direction by the compression coil spring 23. . At this time, the speed of movement in the direction of arrow C is braked by the oil damper unit 4, and the linear motion link 21 gradually and gradually comes out toward the front.

In this case, the linear motion link 21 has an inner surface 31.
While being guided by the guide members 33 and 34, one end of the lock spring 30 is guided by sliding in the straight groove 29. When the tip of the linear motion link 21 hits an external member (not shown), the movement of the linear motion link 21 forward (direction of arrow C) is stopped. FIG. 1C shows a state where the external member is hit. It should be noted that the base 20 and the linear motion link 21 may be provided with appropriate irregularities to form a stopper mechanism that stops before hitting the external member.

In the state shown in FIG. 1C, an arrow A is attached to the linear motion link 21.
When the one end portion of the lock spring 30 reaches the end point 29a of the heart cam 28 (see FIG. 1B) by applying a force in the direction, the heart cam 28 and the lock spring 30 lock each other. When is released, the state returns to the state shown in FIGS. 1A and 1B, and the linear motion link 21 is locked.

FIG. 3 shows a state in which the damper device shown in FIGS. 1A to 1C is applied to a door opening / closing mechanism under a front panel of a television receiver. In FIG. 3, one end of a door link 37 is attached to the tip of the linear motion link 21, and a door 40 that rotates about a rotation shaft 38 is attached to the other end of the door link 37. ..

In the locked state of the damper device shown in FIG. 3, by applying a force in the direction of arrow A to the end portion of the door 40, as described above, the lock spring 30 and the heart cam 2 are provided.
The lock of the lock mechanism portion by 8 is released, and the linear motion link 21 gradually comes out in the direction of arrow C (forward). In this case, the joint 41 between the door link 37 and the door 40 is formed by the rotary shaft 38.
It moves on an arc 42 centered on. Then, the door 40 also rotates in the direction of the arrow B, and when a part of the door 40 hits a frame (not shown), the opening operation of the door 40 is stopped.

Next, the door 40 is closed by applying a force opposite to the direction of the arrow B to close the door 40.
0 and the lock mechanism unit is locked by the heart cam 28.

As described above, according to the above-described embodiment, the linear motion link 21 having the rack for changing the rotational motion of the oil damper unit 4 into the linear motion, and the linear motion link 21.
Since the heart cam 28 and the lock mechanism portion by the lock spring 30 are provided during the linear motion of 1, the damper device with the lock mechanism using the oil damper unit 4 and having a low height can be obtained. Further, since the damper device is constituted by the oil damper unit 4 and the rack mechanism, the dimension in the depth direction can be shortened.

Furthermore, since the heart cam 28 is used and the lock spring 30 is attached to the base 20, the lock mechanism is integrated with the damper device, and the accuracy of the lock mechanism is ensured by the damper device itself. Further, since the convex portion for the lock mechanism formed on the door described in the section of the prior art is unnecessary, for example, the input / output terminal of the television receiver and an external device, for example, a VTR with a built-in camera can be inserted. There is also a derivative effect that it does not get in the way when it is connected to the output terminal with a cable.

The damper device shown in FIGS. 1A to 1C has versatility because it can be used for purposes other than opening and closing a door, for example, for a tray of a video disc.

FIG. 4 is a side view showing the configuration of another embodiment of the damper device of the present invention. Note that, in FIG. 4, components corresponding to those described above are designated by the same reference numerals, and detailed description thereof will be omitted.

The damper device shown in FIG. 4 has a base 41 having a rear wall formed with a square hole 39, and a linear motion link 42 having a longer length on the rear side thereof. 42 is formed so as to pass through the square hole 39. A groove 43 including a heart cam and a straight groove is formed below the elongated portion of the linear motion link 42. One end of a lock spring 44 attached to the rear wall of the base 41 is inserted into the groove 43. A rack 46 is formed on the main body portion 45 of the linear motion link 42, and the rack 46 is mounted on the base 41.
It engages with the gear 5 of the oil damper unit 4 attached to the side surface of the. Also, the main body 45
The rear surface is in a state of being pressed in the direction of arrow C by the other end of the compression coil spring 23, one end of which is attached to the rear wall of the base 41. The operation of the example of FIG. 4 is similar to the operation of the example of FIG. 1 described above.

According to the example of FIG. 4, compared with the example of FIG.
Although the length in the depth direction becomes longer, there is an advantage that the height becomes further lower. The height direction in this example of FIG.
Almost at the height of the oil damper unit 4.

FIG. 5 shows the essential structure of a damper device according to still another embodiment in which the height is further reduced as compared with the examples of FIGS. 1 and 4. In this damper device, the oil damper unit 4 is attached to the upper side of the base 51 downward. Hole 5 into which gear 5 is inserted
2 is open above the base 51. A rack 58 meshed with the gear 5 has a linear motion link 5 having an L-shaped cross section.
3 is formed on one surface portion. Further, a groove 56 including a heart cam 54 and a straight groove 55 is formed on the remaining surface. One end of a lock spring (not shown) is inserted in the groove 56.

Other components are not shown,
It is similar to the schematic diagram 1 example. According to the example of FIG. 5, since the oil damper unit 4 is attached downward, it is possible to obtain a damper device having a height lower than those of the examples of FIGS. 1 and 3.

The heart cam is not a groove cam,
For example, as shown in FIGS. 6A to 6C, a lock spring 61 having a spring force with respect to the linear motion link 60 in the directions of arrows F and G.
And a solid 63 having an inclined surface 62 and a wedge-shaped solid 6
It can also be formed by combining four. 6A to 6C, a force in the direction of arrow C is constantly applied to the linear motion link 60 by a compression coil spring (not shown).

The state shown in FIG. 6A is a locked state, in which the tip of the lock spring 61 is received by one surface of the solid body 64. In the state shown in FIG. 6A, by applying a force to the linear motion link 60 in the direction of arrow A, the tip of the lock spring 61 is moved to the direction of arrow G.
Direction, the lock is released and the inclined surface 62 of the solid 63
I will grab it. In this state, when the force applied in the direction of arrow A is released, the linear motion link 60 moves in the direction of arrow C by the compression spring. At the time of movement, it gradually moves due to the braking force of a damper unit (not shown). Then, as shown in FIG. 6C, the lock spring 61 is
When the upper surface of 64 is crossed, the lock spring 61 becomes
It falls on the surface 65 on which 3, 64 are formed, and the surface 65
Sliding up in the direction of arrow A relatively. The state of FIG. 6C is the unlocked state, and, for example, assuming that the door link and the door are attached to the linear motion link 60, this corresponds to the opened state of the door.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various configurations can be adopted without departing from the gist of the present invention.

[0037]

As described above, according to the damper device of the present invention, the rack for converting the rotary motion of the rotary oil damper into the linear motion, and the lock mechanism section having the cam during the linear motion of the rack are provided. Therefore, the effect that the oil damper can be used, the height is lowered, and the restriction on the mounting dimensional accuracy can be loosened is obtained.

[Brief description of drawings]

FIG. 1A is a partially omitted sectional side view showing the configuration of an embodiment of a damper device according to the present invention. B is a partially omitted cross-sectional plan view showing a locked state of the damper device shown in A. C is a partially omitted sectional side view showing a state where the lock of the damper device shown in A is released.

FIG. 2 is a perspective view showing a structure of a linear motion link of the damper device shown in FIG.

3 is a partially omitted cross-sectional side view showing a state in which the damper device shown in FIG. 1 is applied to a front panel portion of a television receiver.

FIG. 4 is a partially omitted sectional side view showing the configuration of another embodiment of the damper device according to the present invention.

FIG. 5 is a partially omitted perspective view showing the configuration of still another embodiment of the damper device according to the present invention.

6A to 6C are perspective views showing the configuration of another example of the cam with a lock mechanism and used for explaining the operation thereof.

FIG. 7 is a side view showing a configuration of a door opening / closing device to which a damper device according to a conventional technique using an oil damper unit is applied.

FIG. 8 is a side view showing a configuration of a door opening / closing device to which a conventional damper device using an air pot is applied.

[Explanation of symbols]

 4 Oil damper unit 21 Direct acting link 22 Rack 28 Heart cam 30 Lock spring

Claims (1)

[Claims] 1. A damper device comprising: a rotary oil damper; a rack for converting the rotary motion of the rotary oil damper into a linear motion; and a lock mechanism section having a cam during the linear motion of the rack. ..