JP3463270B2 - Storage box damper device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a damper device used for a storage box such as a glove box which is openably and closably provided on an instrument panel of an automobile.

[0002]

2. Description of the Related Art In a storage box such as a glove box, a damper device for controlling the opening / closing operation of the storage box is provided in order to prevent the storage box itself from suddenly opening or causing an unpleasant impact sound. May be required. Therefore, as this type of damper device, for example, an air type damper device disclosed in Japanese Utility Model Laid-Open No. 5-76894 is proposed.

Although not specifically shown, the conventional damper device is mainly composed of a cylinder, a piston and three parts of a pulling wire, and a piston having a seal ring around the cylinder is slidably arranged. The piston in one direction by a compression coil spring, while a guide cap is fitted to the front end opening side of the cylinder, and one end of a pulling wire wired in any direction by the guide cap is inserted into the cylinder. In, it is configured to be connected to the piston.

Further, on the rear end side of the cylinder, a cylindrical portion and a rear wall having a ventilation hole are integrally formed, and a seat valve and a backup spring having an orifice bored in the cylindrical portion of the rear wall. And the air filter are sequentially arranged, and the air filter side is held by a retainer having an opening.

Therefore, when such a damper device is used in a glove box, the cylinder is fixed to either the glove box side or the instrument panel side, and a pulling wire wired through the guide cap is used. The end may be fixed to the other.

When the glove box is rotated in the opening direction by utilizing its own weight in actual operation,
Since the pulling wire is pulled outward from the inside of the cylinder, the piston accordingly slides toward the guide cap side against the biasing spring pressure of the compression coil spring, allowing the glove box to rotate. However, when the glove box is rotated, air is sucked into the cylinder from the fine holes of the air filter through the orifice of the seat valve due to the sliding of the piston, but the inside of the cylinder is in a negative pressure state, and the piston Since it exerts a braking force on sliding,
This controls the opening operation of the glove box and ensures that the glove box slowly rotates in the opening direction.

[0007]

However, under the conventional damper device, the comparison is made only for controlling the opening operation of the glove box by utilizing the negative pressure state in the cylinder due to the sliding of the piston. Since only a relatively small braking force can be provided, there is a big problem that the entire device must be increased in size in order to obtain the required braking force.

[0008]

The present invention was developed in order to effectively solve the problems of the conventional damper device. The invention according to claim 1 is a cylinder, a piston, and a pulling wire. In the damper device consisting of
The cylinder is provided with a guide part for the pulling wire on the front side, the rear side is opened, and a compression coil spring for urging the piston is arranged inside, and the piston is an inner cylinder that slides inside the cylinder. , A hook for hooking the end of the pulling wire to move the outside of the cylinder, and forming a ventilation hole in the front end surface of the inner cylinder, and changing the internal pressure of the cylinder on the front end side of the inner cylinder. A valve means for contacting with and separating from the vent hole and a seal ring are provided, and the pulling wire is wired so as to extend outward from the hooking portion along the outside of the cylinder through the guide portion to slide the piston. Using the accompanying positive pressure inside the cylinder, we adopted a configuration that controls the opening operation of the storage box.

According to the second aspect of the present invention, on the premise of the first aspect, the hook portion is located in front of the sliding portion of the piston and the cylinder.

According to a third aspect of the present invention, based on the first and second aspects, the piston has an outer cylinder that slides outside the cylinder, and the cylinder is composed of an outer cylinder and an inner cylinder of the piston. We adopted a configuration of holding from the inside and outside.

According to a fourth aspect of the present invention, there is provided a damper device including a cylinder, a piston and a pulling wire,
The cylinder is integrally provided with the guide part of the pulling wire on the front end side, only the rear end face is opened, and the compression coil spring for urging the piston is arranged inside, and the piston is located outside the rear end part of the cylinder. It has an outer cylinder that slides and an inner cylinder that slides inside the rear end of the cylinder, and forms a hook on the outer cylinder to hook the end of the pulling wire. Along with forming the pores, a seal ring having valve means that comes into contact with and separates from the vent hole when the internal pressure of the cylinder changes is provided around the tip of the inner cylinder, while a guide claw is provided at the rear end of the cylinder. Forming a slit for engaging the guide claw on the outer cylinder side of the piston, and sliding the piston under the condition that the guide claw is engaged in the slit,
A configuration is adopted that controls the opening operation of the storage box by utilizing the positive pressure state in the cylinder due to the sliding of the piston.

According to a fifth aspect of the present invention, on the premise of the fourth aspect, a shoulder portion for receiving the end turn portion of the compression coil spring is formed on the front end surface of the inner cylinder of the piston, and the shoulder portion is formed at the center of the diameter direction of the shoulder portion. A configuration is adopted in which a recessed portion that is recessed from the surface of the portion is defined, and a ventilation hole is formed in the recessed surface so that the valve means mounted in the recess faces the ventilation hole so that it can come into contact with and separate from the ventilation hole.

Therefore, according to the first aspect of the present invention, by utilizing the positive pressure state in the cylinder due to the sliding of the piston, a large braking force can be obtained under the simple and small damper device using the pulling wire. In addition to being able to reduce the number of seal members for the inside of the cylinder, it also has excellent sliding resistance and airtightness because the pulling wire runs along the outside of the cylinder through the hooking part and the guide part. Becomes Further, even if there is a positional variation between the damper device and the storage box or the like, there is no fear that the sliding of the piston with respect to the cylinder will be adversely affected, so the braking function will not deteriorate.

Further, according to a second aspect of the present invention, the friction generated between the piston and the cylinder causes the piston to be pulled back rearward, in front of the load point position.
Since the pulling wire is hooked on the hooking portion, the piston can slide smoothly without causing a slip stick or the like, and therefore wear is less likely to occur.
Further, according to claim 3, the presence of the outer cylinder suppresses the deformation of the cylinder itself and the inner cylinder of the piston, and the reliable contact state between the cylinder and the piston can be ensured. Motion can be guaranteed.

According to the fourth aspect of the present invention, by utilizing the positive pressure state in the cylinder due to the sliding of the piston, a large braking force can be obtained under the simple and small damper device using the pulling wire. The piston can be smoothly slid by the guide action of the guide claw and the slit. According to claim 5, even if the tip end side of the inner cylinder of the piston collides with the corresponding wall surface of the cylinder in the fully contracted state, there is no fear of damage to the valve means and the valve means has a low spring. With a constant number, it can sufficiently respond to a slight pressure change.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to a preferred embodiment shown in the drawings. A damper device according to the embodiment also has an instrument panel P of an automobile as shown in FIG. It was developed for a glove box B that can be opened and closed, and basically consists of a cylinder 1, a piston 2 and a pulling wire 3 as in the conventional case, but the features are: The point is that the following configuration is adopted.

First, the cylinder 1 is entirely molded of a synthetic resin material, and as shown in FIG. 2, a guide portion having a pull-in window 5 for the pulling wire 3 and a curved guide wall 6 on the front end side thereof. 4 are integrally connected to each other, a compression coil spring 7 for urging the piston 2 is provided inside the rear end face side by opening only the rear end face side, and a slit of the piston 2 described later is provided on the rear end opening edge side. It is configured to form a plurality of guide claws 8 that engage with the.

As for the piston 2, as shown in FIG. 3, an outer cylinder 9 made of a synthetic resin material and sliding on the outside of the rear end of the cylinder 1 and an inner cylinder sliding on the inside of the rear end of the cylinder 1. 10 is integrally formed as a double structure, and a hooking portion 11 for hooking the annular one end portion 3a of the pulling wire 3 is formed on the front end edge of the former outer cylinder 9, and in the longitudinal direction thereof, A plurality of slits 1 for engaging the guide claws 8
2, the inner cylinder 10 of the latter is formed with an annular step portion 13 for surrounding a seal ring, which will be described later, on the tip end side thereof, and a shoulder portion 14 for receiving the end turn portion of the compression coil spring 7. In addition, a recess 15 for mounting a valve plate of a seal ring, which will be described later, is defined at the center of the tip in the diametrical direction, and a ventilation hole 16 and an orifice 17 are formed in the surface of the recess 15. In addition, from the viewpoint of preventing damage to the valve plate, the surface of the recess 15 is recessed toward the rear side of the inner cylinder 10 with respect to the surface of the shoulder portion 14.

The seal ring 18 has a ring portion molded of synthetic rubber or a soft resin material, and the metal valve plate 1 having a substantially inverted M shape on one side surface side.
9 is integrally provided, and the ring portion of the seal ring 18 is locked to the annular step portion 13 formed on the inner cylinder 10 of the piston 2 while the valve plate 19 is exposed in the recess 15. At the same time that the seal ring 18 itself is provided around the distal end portion of the inner cylinder 10, the valve plate 19 and the hole edge of the vent hole 16 face each other with a minute clearance, and the internal pressure of the cylinder 1 is changed to change the valve. The plate 19 can be brought into contact with and separated from the vent hole 16. Since the valve plate 19 is set so as not to interfere with the orifice 17, the orifice 17 itself is always open.

Therefore, in such a damper device, the peripheral state of the seal ring 18 having the valve plate 19 with respect to the tip of the inner cylinder 10 of the piston 2 is obtained, and the inner cylinder 10 concerned is obtained.
The outer cylinder 9 of the piston 2 is fitted to the outside of the rear end of the cylinder 1 while the front end of the cylinder 1 is exposed in the rear end opening of the cylinder 1, and the corresponding guide claw 8 is inserted into the slit 12. The cylinder 1 without the piston 2 coming off.
The guide claw 8 is slidably supported on the rear end side of the guide claw 8.
The piston 2 itself is biased outward by the spring pressure of the compression coil spring 7 until it is regulated by the slit 12.

Then, after that, the annular one end 3a of the pulling wire 3 is hooked on the hooking portion 11 of the outer cylinder 9 of the piston 2,
The annular other end portion 3b is pulled out from the inside of the guide portion 4 of the cylinder 1 along the outside of the cylinder 1 through the above-mentioned lead-in window 5, and the cylinder 1 is attached to the back surface of the glove box B via the attachment portion 1a. While fixing by screwing to the opposing instrument panel P side, the annular other end 3b of the pulling wire 3 is hooked and fixed to the fastening portion 20 provided on the side surface of the glove box B, whereby
The damper device can be easily installed.

When the locking means (not shown) is unlocked and the glove box B is rotated in the opening direction by using its own weight, the pulling wire 3 causes the guide wall of the guide portion 4 of the cylinder 1 to move. 6 is pulled outward while being guided by 6, and accordingly, as shown in FIG. 4, the guiding action of the guide claw 8 and the slit 12 is obtained, and the piston 2 receives the biasing spring pressure of the compression coil spring 7. Against the guide part 4
The glove box B is allowed to rotate by sliding to the side.

However, when the glove box B is rotated, the internal pressure of the cylinder 1 rises due to the sliding of the piston 2, which causes the seal ring 18 to move.
Since the valve plate 19 of the cylinder 1 bends to block the ventilation hole 16 and the air in the cylinder 1 is only discharged to the outside through the small orifice 17, the positive pressure inside the cylinder 1 causes the piston 2 to slide. Braking force works.

As a result, the opening operation of the glove box B is controlled, and the glove box B is guaranteed to slowly rotate in the opening direction. Therefore, under the present embodiment, unlike the conventional one, the piston 2
Since the positive pressure state in the cylinder 1 that accompanies the sliding is positively used, a large braking force can be provided for the first time with a small device without making the device itself large.

Moreover, the glove box B and the piston 2
The pulling wire 3 that connects the cylinders 1 is hooked on the hooking portion 11 located in front of the load point position where the piston 2 is pulled back by the friction generated between the piston 2 and the cylinder 1, and extends along the outside of the cylinder 1. Since the piston 2 does not cause a slip stick or the like, the piston 2 slides smoothly and is less likely to wear, and the number of seal members for the inside of the cylinder 1 is reduced to reduce sliding resistance and The airtightness will also be excellent. Furthermore, since the valve plate 19 itself is installed in a recessed portion 15 that is recessed one step further than the shoulder portion 14, it is completely retracted, for example, and the tip end portion of the inner cylinder 10 of the piston 2 is in a fully contracted state. Even if the side collides with the corresponding wall surface of the cylinder 1, there is no risk of damage, and the valve plate 19 can sufficiently respond to a slight pressure change with a low spring constant.

When the glove box B is closed, the glove box B is rotated in the opposite direction this time. When the glove box B is rotated in the opposite direction, the biasing spring of the compression coil spring 7 is used. Due to the pressure, the piston 2 also slides in the direction opposite to the above-mentioned direction, and at the same time, the pulling wire 3 is also pulled back in the biased sliding direction of the piston 2 while being guided by the guide wall 6 of the guide portion 4.

However, at this time, the internal pressure of the cylinder 1 is lowered, and the change of the internal pressure causes the valve plate 19 to turn.
Bends to open the vent hole 16 and allow air to flow into the cylinder 1. This promotes sliding of the piston 2 and ensures that the glove box B smoothly rotates in the closing direction. It

In the above-described embodiment, the cylinder 1 is fixed to the instrument panel P side, and the other end 3b side of the pulling wire 3 is fixed to the glove box B side. The damper device is not limited to this, but conversely, the cylinder 1 is fixed to the glove box B side, and the other end 3b of the pulling wire 3 is fixed.
It is also possible to fix the side to the instrument panel P side via the fastening portion 20. Also, under the embodiment,
Since the pulling wire 3 can be freely pulled out in any direction by the guide action of the guide portion 4 of the cylinder 1, the fixed position and fixed posture of the cylinder 1 are not limited to those shown in the drawings.

[0029]

As described above, the damper device of the present invention is
By adopting the above configuration, it is possible to provide the braking force to the storage box by utilizing the positive pressure state in the cylinder due to the sliding of the piston, so compared with the conventional one using the negative pressure state. Therefore, it is possible to provide a large braking force without increasing the size of the device.

Further, according to the first aspect, since the pulling wire is routed along the outside of the cylinder via the hooking portion and the guide portion, the number of seal members with respect to the inside of the cylinder can be reduced, and the sliding resistance can be reduced. In addition to being excellent in airtightness, even if there is a positional difference between the damper device and the storage box, there is no fear of adversely affecting the sliding of the piston with respect to the cylinder, so the braking function may deteriorate. Absent.

According to the second aspect of the present invention, the friction wire generated between the piston and the cylinder causes the pulling wire to be hooked on the hooking portion in front of the load point position where the piston is pulled back backward. Without causing slip sticks, etc.
Since it can slide smoothly, it is less likely to wear. According to the third aspect, the presence of the outer cylinder suppresses the deformation of the inner cylinder of the cylinder and the piston, and the reliable contact state between the cylinder and the piston can be ensured. Therefore, the smoother sliding of the piston can be ensured. .

According to the fourth aspect, a large braking force is provided under the simple and small damper device using the pulling wire by utilizing the positive pressure state in the cylinder due to the sliding of the piston. At the same time, the piston can be slid smoothly by the guide action of the guide claw and the slit. According to claim 5, even if the tip end of the inner cylinder of the piston collides with the corresponding wall surface of the cylinder in the fully contracted state, the valve means is not damaged and the valve means has a low spring constant. Thus, even a slight pressure change can be sufficiently responded.

[Brief description of drawings]

FIG. 1 is an external perspective view of a main part of a damper device according to an embodiment of the present invention, showing the relationship between a glove box and an instrument panel.

FIG. 2 is a sectional view showing a state before the damper device operates.

FIG. 3 is an exploded perspective view of essential parts showing the relationship between the seal ring and the inner cylinder of the piston.

FIG. 4 is a cross-sectional view showing a state during operation of the damper device.

[Explanation of symbols]

1 cylinder 2 pistons 3 pull wire 3a One end of pulling wire 3b The other end of the pulling wire 4 Guide section 5 entrance windows 6 guide wall 7 Compression coil spring 8 guide claws 9 outer cylinder 10 inner cylinder 11 Hook 12 slits 16 vents 17 Orifice 18 seal ring 19 Valve plate (valve means) B glove box (storage box) P instrument panel

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeki Tatsumi 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (56) Reference JP-A-8-105482 (JP, A) Sankaihei 5- 76894 (JP, U) Actual development 5-58996 (JP, U) Actual development 2-147350 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60R 7/06 E05F 3 / 02

Claims (5)

(57) [Claims] 1. A damper device comprising a cylinder, a piston and a pulling wire, wherein the cylinder is provided with a guide portion for the pulling wire on a front side thereof, an opening at a rear side thereof, and a compression coil for urging the piston therein. With springs
The piston has an inner cylinder that slides inside the cylinder, and a hooking portion that hooks the end of the pulling wire and moves outside the cylinder, and forms a ventilation hole in the tip end surface of the inner cylinder. Provided on the distal end side of the inner cylinder is a valve means that comes into contact with and separates from the vent hole when the internal pressure of the cylinder changes, and a seal ring. A damper device for a storage box, which is wired so as to extend toward one side, and is configured to control the opening operation of the storage box by utilizing the positive pressure state in the cylinder due to the sliding of the piston. 2. The damper device for a storage box according to claim 1, wherein the hooking portion is located in front of a sliding portion between the piston and the cylinder. 3. The piston according to claim 1, wherein the piston has an outer cylinder that slides on the outside of the cylinder, and the outer cylinder and the inner cylinder of the piston hold the cylinder from the inside and the outside. The damper device for the storage box according to any one of 1. 4. A damper device comprising a cylinder, a piston and a pulling wire, wherein the cylinder is integrally provided with a guide portion of the pulling wire on a front end side thereof, and only a rear end face is opened to urge the piston inside. The piston has an outer cylinder that slides outside the rear end of the cylinder and an inner cylinder that slides inside the rear end of the cylinder. Forming a hook for hooking the end portion of the inner cylinder, forming a ventilation hole in the front end surface of the inner cylinder, and having valve means on the front end side of the inner cylinder for coming into contact with and separating from the ventilation hole due to a change in the internal pressure of the cylinder. While surrounding the seal ring, a guide claw is formed on the rear end side of the cylinder, and a slit for inserting the guide claw is formed on the outer cylinder side of the piston to prevent the guide claw from being inserted into the slit. Under the piston A damper device for a storage box, characterized in that the opening operation of the storage box is controlled by sliding the valve and utilizing the positive pressure state in the cylinder due to the sliding of the piston. 5. A shoulder portion for receiving an end turn portion of a compression coil spring is formed on a front end surface of an inner cylinder of a piston, and a recessed portion recessed from the shoulder surface is formed at a diametrical center of the shoulder portion, and 5. A damper device for a storage box according to claim 4, wherein a ventilation hole is formed in the concave surface, and the valve means mounted in the concave surface faces the ventilation hole so that the valve means can come into contact with and separate from the ventilation hole.