JP4183055B2 - Opening speed suppression structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an opening / closing device applied to a glove box, a lid, or the like provided on an instrument panel of an automobile, and more particularly to an opening / closing device having a structure in which a sudden opening operation is suppressed using a piston type air damper.
[0002]
[Prior art]
In an opening / closing device provided with an opening / closing member such as a glove box or a lid, a damper member may be provided in order to suppress a sudden opening operation of the opening / closing member. As a damper member used in this type of opening / closing device, a piston type air damper having a piston projecting and retracting from a cylinder is known, and this damper member is connected between the main body and the opening / closing member to open the opening / closing member. The opening force of the opening / closing member is suppressed by the resistance force of the piston pulled out by the operation.
[0003]
Specifically, the opening / closing member is swingable about a support shaft provided in the main body, and the cylinder of the damper member is swingably attached to the main body side of the opening / closing device, while the tip of the piston is opened / closed. It is connected to be freely rotatable. As the opening / closing member opens, the piston is pulled out of the cylinder, but the pulling operation causes the inside of the cylinder to be in a negative pressure state to generate a resistance force. This resistance force acts on the opening / closing member, and its rapid opening operation is suppressed.
Here, the resistance force generated in the piston uses the negative pressure inside the cylinder that accompanies the pulling-out operation. Therefore, the greater the pull-out amount of the piston with respect to the unit opening angle (swinging angle) of the opening / closing member, Power increases.
[0004]
The largest amount of piston with respect to the unit opening angle (swinging angle) of the opening / closing member is when the central axis of the piston is arranged in the tangential direction with respect to the swinging track of the opening / closing member. Therefore, if the damper member is arranged so that the central axis of the piston faces the tangential direction or the direction close to the swinging trajectory of the opening / closing member over the swinging range from the opening of the opening / closing member to the open end, it is efficient. Further, the opening operation of the opening / closing member can be suppressed.
[0005]
[Problems to be solved by the invention]
However, it is necessary to install the switchgear in a very limited space in the instrument panel of a car, etc., regardless of the sufficient installation space for the switchgear. In many cases, the damper member is not freely arranged.
[0006]
For example, many glove boxes, lids, etc. have a structure that opens from a vertical position to a horizontal position. In addition, the damper member must be disposed in a lateral position so as to extend to the back side of the instrument panel. However, the interior of the instrument panel has no depth to extend the damper member to the back side, so conventionally the damper member is arranged in a vertical position, and the central axis of the piston is set to the swinging track of the opening / closing member. There was a situation that had to be directed near the normal direction.
When the damper member is arranged in this way, particularly at the beginning of opening of the opening / closing member, the amount of piston withdrawn with respect to the unit opening angle of the opening / closing member is small. There was an inconvenience that an open section was formed.
[0007]
[Means for Solving the Problems]
The present invention has been developed in order to effectively solve the problems of such a conventional apparatus. The invention according to claim 1 includes an opening / closing member swingable around a first support shaft provided in a main body. The second support shaft provided on the main body is swingable about the second support shaft and is connected between the second support shaft and the opening / closing member, and the piston is pulled out from the cylinder as the opening / closing member opens. And a damper member that applies a resistance force to the opening and closing member, and biasing means that applies a resistance moment in a direction opposite to a swinging direction associated with an opening operation of the opening and closing member to the damper member. It is provided.
[0008]
According to a second aspect of the present invention, in the switchgear according to the first aspect, the resistance moment by the biasing means gradually increases as the damper member swings according to the opening operation of the open / close member. The damper member is connected between the second support shaft and the opening / closing member so that the swing angle of the damper member with respect to the unit opening angle of the opening / closing member is reduced starting from the closed position of the opening / closing member. It is characterized by that.
[0009]
According to a third aspect of the present invention, on the premise of the first or second aspect of the present invention, the biasing means is constituted by a torsion coil spring, and the coil winding portion of the torsion coil spring is fitted on the second support shaft. In addition, one end portion extending from the coil winding portion is locked to the main body or the second support shaft, and the other end portion extending from the coil winding portion is locked to the damper member. .
[0010]
Therefore, in the first aspect of the invention, the urging means for applying a resistance moment in the direction opposite to the swinging direction accompanying the opening operation of the opening / closing member, that is, the direction of closing the opening / closing member, to the damper member. Thus, even when the deterring force by the damper member is small, it is possible to suppress the sudden opening operation of the opening / closing member with the resistance moment by the urging means. In addition, since a resistance moment in the closing direction is applied to the damper member, rattling of the damper member is prevented, and at the same time, the opening / closing member is also urged in the closing direction via the damper member. Shaking and chattering of the opening / closing member is also prevented.
[0011]
Further, in the invention described in claim 2, as the opening / closing member opens, the swing angle of the damper member also increases, and the resistance moment acting on the damper member increases, but symmetrically. Since the swinging angle of the damper member relative to the unit opening angle of the opening / closing member decreases, a sufficient opening angle of the opening / closing member can be obtained just by slightly swinging the damper member against the large resistance moment, and opening / closing A smooth opening operation of the member is ensured.
[0012]
Examples of the urging means for generating a resistance moment as described in claim 2 include a spring member whose resistance increases in accordance with the amount of deformation. The invention described in claim 3 employs, in particular, a torsion coil spring among the spring members of this type as the biasing means, and externally fits the coil winding portion to the second support shaft, thereby reducing the installation space. Has also been made compact.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view showing a damper member and its urging means as the main part of the switchgear according to the embodiment of the present invention, and FIG. 2 is a side view of the same.
The opening / closing device includes a main body 10, an opening / closing member 20 such as a glove box, a damper member 30, and a torsion coil spring 40 as urging means. The main body 10 is composed of a frame body incorporated in, for example, an instrument panel of an automobile, and the opening / closing member 20 is centered on a first support shaft (not shown in FIGS. 1 and 2) provided at the lower portion of the main body 10. Is supported so as to be swingable.
[0014]
The damper member 30 employs a piston-type air damper in which the piston 32 protrudes and retracts from the cylinder 31. A negative pressure is generated in the cylinder 31 as the piston 32 is pulled out, and a resistance force is exerted on the piston 32 with this negative pressure. It is a configuration to grant. This resistance force increases in accordance with the amount of piston 32 pulled out.
[0015]
Mounting pieces 33 and 34 each having mounting holes 33a and 34a project in the same direction at the base end portion and the tip end portion of the cylinder 31, and the base end mounting piece 33 is provided at the top of the main body 10. The second support shaft 12 is slidably fitted on the second support shaft 12 and is prevented from coming off by a fastener 13 such as a screw. On the other hand, an attachment piece 34 formed at the tip of the piston 32 is rotatably connected to a support shaft 21 provided on the side surface of the opening / closing member 20.
[0016]
Thus, the damper member 30 connected between the second support shaft 12 and the opening / closing member 20 is disposed substantially downward when the opening / closing member 20 is in the closed position, and is further shaken along with the opening operation of the opening / closing member 20. When moved, the piston 32 is pulled out to the front side of the main body 10. Therefore, it can be incorporated in a narrow space such as an instrument panel without considering the rear space.
In addition, a coil winding portion 41 of a torsion coil spring 40 is externally fitted to the second spindle 12 before the mounting piece 33, and one end portion 42 extending from the coil winding portion 41 is provided in the second support shaft 12. The other end 43 extending from the coil winding portion 41 is locked to the mounting hole 34 a of the mounting piece 34 provided at the tip of the cylinder 31. Thus, a resistance moment is applied to the damper member 30. This resistance moment acts in the direction opposite to the swinging direction of the damper member 30 accompanying the opening operation of the opening / closing member 20. Accordingly, even in a stationary state, the damper member 30 is prevented from rattling by the action of the resistance moment, and at the same time, the opening / closing member 20 is also urged in the closing direction via the damper member 30. Shaking and chattering of the opening / closing member 20 are also prevented.
[0018]
The opening / closing member 20 opens from the closed position in the direction indicated by the arrow a in FIG. 2 (clockwise direction). In conjunction with this opening operation, the damper member 30 moves in the direction indicated by the arrow b in FIG. ). Along with this swinging, the coil winding portion 41 of the torsion coil spring 40 is twisted, so that the resistance moment with respect to the damper member 30 gradually increases.
[0019]
As shown in FIG. 3, when the opening / closing member 20 starts the opening operation from the closed position with the first support shaft 11 as the center, the damper member 30 is connected to the opening / closing device having the above-described configuration in association with the opening operation. And the piston 32 is pulled out from the cylinder 31.
[0020]
FIG. 4 is a diagram schematically showing the relationship between the opening angle of the opening / closing member 20, the swinging angle of the damper member 30, and the pull-out amount of the piston 32 at this time. As described above, when the opening / closing member 20 is in the closed position, the damper member 30 disposed substantially downward is such that the central axis of the piston 32 is substantially in the normal direction with respect to the swinging track of the opening / closing member 20. (I in FIG. 4).
[0021]
From this posture, when the opening / closing member 20 is opened by the unit opening angle θ, the swing angle of the damper member 30 is ω ₁ , and the pull-out amount of the piston 32 is L ₁ . Subsequently, when the opening / closing member 20 is opened by the unit opening angle θ, the swinging angle of the damper member 30 is ω ₂ , and the pull-out amount of the piston 32 is L ₂ . Further, when the opening / closing member 20 is opened by the unit opening angle θ, the swinging angle of the damper member 30 is ω ₃ , and the pull-out amount of the piston 32 is L ₃ .
In this process, since the central axis of the piston 32 member gradually moves in the tangential direction with respect to the swing track of the opening / closing member 20, the swing angle of the damper member 30 gradually decreases (that is, ω ₁ > ω ₂ > ω ₃ ), and the pull-out amount of the piston 32 increases (that is, L ₁ <L ₂ <L ₃ ).
[0022]
Therefore, in the vicinity of the opening and closing member 20 has started the operation opening, for extraction amount L ₁ of the unit opens the piston 32 with respect to the angle θ of the member 20 is small, the effect of suppressing the opening operation by the damper member 30 is small. However, in the switchgear according to the present embodiment, since the resistance moment caused by the torsion coil spring 40 acts on the switchgear member 20 via the damper member 30, the switchgear member 20 is also generated by the resistance moment even in the vicinity of the opening operation start position. The abrupt opening operation is suppressed.
[0023]
Further, in the vicinity of the open end of the opening / closing member 20, the pulling amount L _{3 of the} piston 32 increases with respect to the unit opening angle θ of the member 20, so that the damper member 30 can obtain a sufficient effect of suppressing the opening operation. it can. On the other hand, when the opening / closing member 20 swings to the vicinity of the open end, the damper member 30 also swings greatly (ω ₁ + ω ₂ + ω ₃ ), so that the resistance moment by the torsion coil spring 40 increases. However, in this vicinity, the opening / closing member 20 is greatly opened with respect to the slight swing ω ₃ of the damper member 30, so that an increase in the resistance moment by the torsion coil spring 40 has little influence on the opening operation of the opening / closing member 20.
[0024]
The present invention is not limited to the above-described embodiment. For example, even when a piston type air damper is adopted as the damper member, the piston 31 is mounted on the second support shaft 12 and the cylinder 31 is mounted. You may connect with the opening-and-closing member 20, and it is also possible to use other urging means, such as a tension coil spring and rubber | gum, as needed.
[0025]
【The invention's effect】
As described above, according to the opening / closing device of the present invention, the damper is provided with the urging means for applying a resistance moment in the direction opposite to the swinging direction accompanying the opening operation of the opening / closing member. Even when the deterring force by the member is small, the sudden opening operation of the opening / closing member can be suppressed by the resistance moment by the urging means.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a damper member and its urging means as the main part of an opening / closing device according to an embodiment of the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is a side view showing the operation of the switchgear according to the embodiment of the present invention.
4 is a diagram schematically showing the operation of the switchgear shown in FIG. 3. FIG.
[Explanation of symbols]
10: body 11: first support shaft 12: second support shaft 12a: locking groove 13: fastener 20: opening / closing member 21: support shaft 30: damper member 31: cylinder 32: piston 33, 34: mounting piece 33a, 34a: mounting hole 40: torsion coil spring 41: coil winding part

Claims (3)

An opening / closing member swingable around a first support shaft provided in the main body;
The second support shaft provided on the main body is swingable about the second support shaft, and is connected between the second support shaft and the opening / closing member, and the piston is pulled out from the cylinder as the opening / closing member opens. A damper member that imparts resistance to the opening and closing member,
An opening / closing apparatus comprising an urging means for applying a resistance moment in a direction opposite to a swing direction associated with an opening operation of the opening / closing member to the damper member. The switchgear according to claim 1, wherein the resistance moment by the biasing means gradually increases as the damper member swings according to the opening operation of the switchgear member.
The damper member is connected between the second support shaft and the opening / closing member so that the swing angle of the damper member with respect to the unit opening angle of the opening / closing member is reduced starting from the closing position of the opening / closing member. A switchgear characterized by that. The switchgear according to claim 1 or 2,
The biasing means is constituted by a torsion coil spring, and the coil winding portion of the torsion coil spring is fitted on the second support shaft, and one end portion extending from the coil winding portion is provided on the main body or the second support. An opening and closing device characterized in that the other end portion which is locked to the shaft and extends from the coil winding portion is locked to the damper member.

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