JPH0417876Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention is based on a system in which an opening/closing body such as a door, an ashtray, or an accessory case is pivoted so that it can be retracted from an opening in a board that is the main body, and the opening/closing body is pivoted between the opening/closing body and the main body. It is provided to brake the opening/closing body from opening suddenly when opening the closed opening/closing body,
This relates to a piston-cylinder type damper that opens quietly.

<Prior art> The present applicant filed a utility model registration application dated the same date, which includes a cylinder connected to one of the main body and the opening/closing body, and a piston connected to the other and fitted into the cylinder, and the piston has a A piston-cylinder type damper has been proposed that is provided with a check valve that releases air in the cylinder to the outside of the cylinder when the air is pushed into the cylinder by the movement of the opening/closing body.

Figures 1 to 3 show that an opening is provided on the upper surface of the dart board in front of the driver's seat and the front passenger seat of a car, and an air conditioning ventilation frame is pivoted so that it can be retracted and retracted. ) is closed when the top surface of the ventilation frame is kept almost flush with the top surface of the dart board (solid line in Figure 1), and the damper of the previous proposal prevents the ventilation frame 2 from opening suddenly. shows.

The ventilation frame 2 has a rearward-facing arm 2' on the rear surface, and a shaft 4 supported by a bearing body 3 under the lower surface of the dart board.
The rear end of the arm 2' is pivotally connected to the arm 2'.

A spring 5 is wound around the shaft 4, one end of which is received by the lower surface or bearing body of the dash board, and the other end 5' acts on the lower end of the rear surface of the ventilation frame 2 to bias the ventilation frame in the opening direction. The ventilation frame has a recess 6 on the front side, and a locking device 7 is provided at the front edge of the opening, which plunges into the recess 6 when the ventilation frame is closed and holds the ventilation frame in a closed state. . The locking device 7 is retracted forward against the index of a built-in spring (not shown) by pushing the upper end of the operating piece 8 that protrudes like a push button into the front edge of the opening, and locks the locking device 7 into the recess 6 on the front side of the ventilation frame. move away from

Therefore, in this case, the cylinder 1 is placed between the main body, the dart board 1, and the opening/closing body, the ventilation frame 2.
1 and the damper equipped with the piston 12 are not connected, the ventilation frame, which had been closed by pushing the upper edge of the operating piece, will suddenly open due to the biasing force of the spring 5, for example, the rear edge of the opening of the arm 2'. When it hits the door from below, it makes a slamming sound and stops in the open position, but because the damper is connected, the ventilation frame opens quietly and slowly, giving it a luxurious feel, and by opening suddenly. Prevent damage to the contacting parts.

<Problems to be solved by the invention> However, in order to use the damper of the previous proposal, a locking device for locking the closed opening/closing body in that state and an operating piece for unlocking the locking device must be provided on the main body. Further, since this operation piece is exposed outside the main body, it spoils the appearance of the main body.

<Means for Solving the Problems> Therefore, the present invention consists of a cylinder 11 connected to one of the main body 1 and the opening/closing body 2, and a piston 12 connected to the other and fitted into the cylinder. This is a piston-cylinder type damper provided with a check valve 16 that releases air in the cylinder to the outside of the cylinder when the air is pushed into the cylinder by the movement of the opening/closing body 12. A spring 19 is compressed by being pushed in and stores a force for pushing out the piston, and the piston 12 has a longitudinal groove 21 in the rear half and the above-mentioned groove in the rear end. It is characterized in that a one-way passage groove 23 of the Heart Calm device is provided in communication, and a pin 24 that projects into the grooves 21 and 23 is provided at the open end of the cylinder.

<Example> Figures 4 to 6 show an example of the present invention.
Reference numeral 11 indicates a cylinder, and reference numeral 12 indicates a piston, both of which are molded plastic products. The piston has a hollow cylindrical portion 13 at its tip that protrudes into the cylinder, and an O-ring 14 that slides on the inner periphery of the cylinder is fitted into an annular groove on the outer periphery of the piston. A beak-shaped check valve 16 is fitted and fixed inside the cylindrical portion 13.

This check valve 16 is molded from a soft material such as synthetic rubber, and has a normally open air port 16' at one end and a normally closed air port 16' with a closed lip at the other end. It is fixed in the cylindrical part 13 with 16' at the top. In addition, a through hole 2 communicating with the rear end of the hollow part of the cylindrical part 13 is provided in order to discharge the air coming out from the normally closed air port 16' of the check valve 16 from the inside of the cylinder.
6 are provided across the piston.

The cylinder 11 and piston 12 are connected to a ventilation frame 2 which is an opening/closing body and a board 1 which is a main body, and when the piston 12 is pushed into the cylinder to close the open ventilation frame, the cylinder The air inside enters the valve through the normally open air port of the check valve 16, pushes open the normally closed air port 16' from the inside, exits into the cylindrical portion 13, and from there passes through the through hole 26 between the piston and cylinder. It flows through the gap and exits the cylinder.
Conversely, when the pushed-in piston is pulled out, the normally closed air port 16' is closed, so no air enters the cylinder, and the movement of the piston is braked by the negative pressure generated within the cylinder.

The cylinder 11 accommodates a coil spring 19 that is compressed by a piston that is pushed in when the opening and closing body is closed and stores force for next opening the opening and closing body, and is pushed into the cylinder when the opening and closing body is in the closed position. A locking device 20 for anchoring the piston against the spring 19 is installed between the piston and the cylinder.
Therefore, when you press the opening/closing body to close it, if you press it until it passes a little past the closed position and then release your hand, the opening/closing body will spring 1.
9 is pushed back a little in the opening direction together with the piston and stopped at the closed position by the locking device 20. Next, to open the opening/closing body, push the opening/closing part in the closed position a little again and release your hand. As a result, the piston is pushed in a little, and the locking device 20 releases the mooring of the piston, so that the opening/closing body is gently pushed out together with the piston to the open position by the restoring force of the spring 19.

A heart cam device is used as the lock device 20.

That is, there is a longitudinal groove 21 in the rear half of the piston 12 that emerges and retracts from the cylinder, the rear end of the groove 21 communicates with a one-way passage groove 23 around the heart island 22, and the open end of the cylinder has a longitudinal groove 21. A pin 24 is provided with its tip inserted into the groove. When the piston is pushed in against the spring 19 to close the opening/closing body, the pin 24 moves relatively toward the rear end in the groove 21, and eventually moves about half a turn in the one-way passage groove 23 around Heart Island. The opening/closing body moves a little beyond the closed position. At this stage, when the force pushing the opening/closing body is released, the opening/closing body and the piston are pushed back a little by the restoring force of the spring 19, and the pin 24 is caught in the recess 22' of the heart island and stopped.
The opening/closing body is in the closed position. Next, in order to open the opening/closing body, when you push it a little again and release your hand, the pin 24 escapes from the recess 22' of the heart island, moves about the remaining half circumference of the one-way passage groove 23 by the restoring force of the spring 19, and then The opening/closing body opens by moving through the groove 21.

If necessary, a guide/stopper 25 may be provided between the piston and the cylinder, consisting of a long groove or a long hole and a protrusion extending into the long hole, in order to regulate the stroke of the piston.

Therefore, when the piston is pushed in against the spring 19 to close the opening/closing body, the air in the cylinder flows along the piston through the check valve 16 and the through hole 26.
The opening/closing body can be closed smoothly, and the opening/closing body is moored in the closed position by the locking device 20. and,
Next, in order to open the opening/closing body, the piston is pushed in a little again to release the locking device 20, and when opening with the restoring force of the spring 19, a negative pressure is created in the cylinder by the piston being pulled out from the cylinder. The movement of the spring 19 to open the opening/closing body is braked by the restoring force, and the opening/closing body opens silently.

The pin 24 is made of an elastic metal wire such as a piano wire, and is loosely passed through the hole 12' at the rear end of the cylinder 12 and inserted into the groove 2.
Entering 1.23. This pin integrally connects a rearward-facing, almost inverted L-shaped part 24' at the upper end, and the similarly short downwardly bent part 24' of the rear end also protrudes into the rear hole 12'' of the cylinder, and the rear end of the cylinder An approximately Ω-shaped elastic ring 27 fitted around the outer periphery holds the middle portion of the inverted L-shaped portion against the outer periphery of the cylinder.

Further, in this embodiment, a taper screw hole 28 is provided in the end wall of the cylinder, into which a taper screw 29 is screwed. When the screw 29 is completely tightened, there will be no gap between the screw and the screw hole 28, but if it is loosened a little, there will be no gap.
When the piston is pushed in, some of the air in the cylinder is forced out from this gap rather than through the check valve 16, and conversely, when the piston is pushed out by the restoring force of the spring 19, the outside air is sucked into the cylinder.

Therefore, when placed in this manner, the speed at which the spring 19 opens the opening/closing body with its restoring force can be optimally adjusted depending on the screwing degree of the taper screw. still,
Reference numeral 30 indicates a connecting portion for connecting the end of the piston to either the main body or the opening/closing body, and 31 represents a collar for connecting the cylinder to the other.

In this embodiment, when the piston is pushed into the cylinder, the spring 19 is compressed and stores the force for pushing the piston out. Therefore, the spring 19 is compressed when the piston is pushed into the cylinder. The spring 5 can also be omitted.

<Effects of the invention> As is clear from the above, the check valve 16 is incorporated into the piston 12, the piston 12 is connected to the main body 1 or the opening/closing body 2, the cylinder 11 is connected to the opening/closing body 2 or the main body 1, and the piston is connected to the opening/closing body 2 or the main body 1. As a piston-cylinder type damper that gently dampens the movement of the opening/closing body that moves while being pulled out using the check valve 16, a spring 19 that biases the opening/closing body to the open position is housed in the cylinder 2, and the opening/closing body moves to the closed position. A one-way passage groove 23 of the Heart Calm device for mooring the opening/closing body in the closed position when the opening/closing body is in the closed position and releasing the mooring by pushing the opening/closing body in the closed position, a groove 21 communicating with the passage, and Pin 2 entering the grooves 23 and 21 above
4, the groove 21 is provided in the longitudinal direction in the rear half of the piston 12, the one-way passage groove 23 is provided in the rear end of the piston, and the pin 24 is provided in the open end of the cylinder 11. It is cleverly arranged to be concentrated into a cylinder and a cylinder.

Therefore, by simply installing this piston-cylinder type damper between the main body and the opening/closing body, the opening movement of the opening/closing body can be made quieter, and if the opening/closing body in the closed position is pushed a little, the opening/closing body returns to the open position. Since it starts moving, there is no need to expose operating pieces such as the eject lever to the outside of the main body, and the appearance of the main body is not spoiled.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an air conditioning ventilation frame that appears on the dash board of an automobile, illustrating the main body and the opening/closing body, Fig. 2 is a vertical side view of the same, Fig. 3 is a bottom view, and Fig. 4 is a An exploded perspective view of an example of a damper incorporated between an opening/closing body and a board according to the present invention, FIG. 5 is a partially sectional plan view of the same assembled state as above, and FIG. 6 is a partially sectional plan view of the same as above. In the figure, 11 is a cylinder, 12 is a piston, and 1 is a side view.
3 is a cylindrical part, 14 is an O-ring, 16 is a check valve, 2
0 indicates a locking device.

Claims (1)

[Claims for Utility Model Registration] Consists of a cylinder 11 connected to one of the main body 1 and the opening/closing body 2, and a piston 12 connected to the other and fitting into the cylinder. Therefore, in a piston-cylinder type damper equipped with a check valve 16 that releases air in the cylinder to the outside of the cylinder when the cylinder is pushed into the cylinder, the piston 12 is pushed into the cylinder 11. A spring 19 that is compressed and stores a force for pushing out the piston is housed, and the rear half of the piston 12 that protrudes and retracts from the cylinder 11 has a longitudinal groove 21, and the rear end has a heart-calm device that communicates with the groove. A piston-cylinder damper characterized in that a directional passage groove 23 is provided, and a pin 24 that projects into the grooves 21 and 23 is provided at the open end of the cylinder.