JPH04269284A - Brake mechanism - Google Patents

Abstract

PURPOSE:To stabilize braking effects which are gradually applied to a lid as the lid is opened with increase of energizing force, even when the lid is used over a long period of time. CONSTITUTION:A first strip sliding body 4 is provided on both sides of the lower end 15 of the lid 2 of a glove box and a glove box main body 1 is provided with a second sliding body 6 into which the first sliding body is slidably fitted. As the lid 2 is opened with increase of energizing force due to its weight, the first sliding body 4 is gradually fitted into the second sliding body 6 and increases the sliding area between it and the second sliding body 2. Braking effects are provided by sliding resistance produced thereby.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking mechanism that alleviates the movement of a movable member that is separated from a fixed member by a biasing force.

0002

2. Description of the Related Art A typical braking mechanism obtains a braking effect by using the flow path resistance of a fluid such as oil sealed in a container. However, the magnitude of the braking effect of such a braking mechanism is always constant, and even when the movable member does not need much braking force at the start of the separation movement, it applies more braking force than necessary at the start of the separation movement. There was a problem in that the movement of the movable member was longer than necessary. Therefore, a braking mechanism was developed to solve the above problem.
No. 02749 "Braking device for opening/closing lid". This configuration will be explained below based on the drawings. FIG. 7 shows a perspective view of the braking device used in the opening/closing lid for taking out the cassette of a cassette tape recorder, FIG. 8 shows a perspective view with the opening/closing lid open, and FIG. 9 shows FIG. 8 is shown in IX-IX cross-sectional view. Mounting legs 22, 22 made of elastic material are attached to the back surface of the opening/closing lid 21, and the lower ends of these mounting legs 22, 22 are attached to the cabinet 23.
It is rotatably attached to brackets 24, 24 provided on the back side of the. Further, the back side of the cabinet 23 is provided with conical braking protrusions 25, 25. As shown in FIG. 9, in the process of opening the opening/closing lid 21, the mounting legs 22, 22 move in the direction of the arrow and come into contact with the slopes of the braking protrusions 25, 25, and as the opening/closing lid 21 opens, the mounting legs 22, 22 move in the direction of the arrow. Therefore, the braking effect is gradually increased by being gradually pushed apart by the braking protrusions 25, 25.

0003

As described above, in the brake device for the opening/closing lid, as the opening/closing lid 21 is opened, the mounting legs 22, 22 made of an elastic body are brought into contact with the braking protrusions 25, 25. By elastically deforming the mounting legs 22, 22 and increasing the contact pressure between them and the braking protrusions 25, 25, the sliding resistance generated between them increases, thereby increasing the braking effect. I was getting . Therefore, if the mounting legs 22, 22 become fatigued and plastically deformed due to long-term use, etc., the above-mentioned contact pressure cannot be obtained sufficiently, so there is a problem that a stable braking effect cannot be obtained. Therefore, the present invention has been made to solve the above-mentioned conventional problems, and as the movable member is moved away from the fixed member with an urging force, the sliding area between the pair of sliding bodies is reduced. By increasing the
The purpose is to increase the sliding resistance and thereby obtain a stable braking effect.

0004

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a braking mechanism for a movable member that moves away from a fixed member with an urging force, in which one of a pair of sliding bodies that contacts each other is attached to the fixed member. The other is provided on each movable member, and as the movable member moves away from the fixed member, the contact pressure between each sliding body is substantially constant and the contact area between each sliding body gradually increases. be done.

[0005]

[Operation] According to the above-mentioned means, as the movable member moves away from the fixed member with an urging force, the pair of sliding bodies move while sliding relative to each other with a substantially constant contact pressure. As a result, the sliding area between the pair of sliding bodies increases, and the sliding resistance increases. Therefore, as the movable member moves away from the fixed member, the force for braking the movable member gradually increases.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings, taking as an example a braking mechanism for a glove box lid attached to an instrument panel of a vehicle. FIG. 1 shows a perspective view of the glove box, FIG. 2 shows a sectional view taken along line II-II in FIG. 1 when the lid is closed, FIG. 3 shows a sectional view taken along line II-II in FIG. 1 when the lid is open, and FIG. A cross-sectional view taken along IV-IV in FIG. 2 is shown. The lid (movable member) 2 is attached to the glove box body (fixed member) 1 by a hinge 3.
Connected so they can be opened and closed. The lower end 15 of the lid 2 extends slightly below the hinge 3 and is bent toward the main body 1 side. A band-shaped first sliding body 4 made of an elastic body (for example, resin, leaf spring, etc.) is provided on both sides of the lower end 15 so as to protrude. The thickness of this first sliding body 4 is formed to become gradually thinner toward the tip.

Second generally cylindrical sliding bodies 4 are located at the lower portions of both sides of the mounting frame 5 of the glove box body 1 on the instrument panel (not shown).
A sliding body 6 is provided. As shown in FIG. 4, this second sliding body 6 consists of two ribs 7, 7 and ribs 8, 8, 8 provided between the ribs 7, 7. It is lower than the ribs 7, 7 by the thickness (thickest part) of the first sliding body 4. Further, a standing wall 9 is provided at the upper end of the ribs 7, 7. In addition, the recesses 17 in the side walls of the ribs 7, 7
The cover 10 is attached to the ribs 7, 7 by fitting the protrusions 16, 16 into the ribs 7, 17. The first sliding body 4 is sandwiched between the inner sides of the ribs 7, 7 of the second sliding body 6, and is fitted into the second sliding body 6 so as to come into contact with the ribs 8, 8, 8. The operation of this embodiment will be explained below. When the lid 2 closes the main body 1, the first
The sliding body 4 is in a curved state near the connection part with the lid 2,
The tip thereof is configured to stay at the center of the second sliding body 6, and the other surface 12 is placed on the cover so that one surface 11 of the first sliding body 4 comes into contact with the ribs 8, 8, 8 from the lower end to the center. It is held down by 10.

As the lid 2 is opened from this closed state with an urging force due to its own weight, the first sliding body 4 is fitted into the second sliding body 6, and one side 1 of the first sliding body 4 is opened.
1 increases the sliding area with the ribs 8, 8, 8. As a result, in the process of opening the lid 2, the sliding resistance between the first sliding body 4 and the second sliding body 6 gradually increases. Due to this sliding resistance, a braking effect gradually acts on the lid 2 during the opening process. Therefore, when the lid 2 starts to open, it does not take longer than necessary and starts to open smoothly, and when the lid 2 is fully opened, a sufficient braking effect is exerted to soften the impact. In addition, since the contact pressure between the first sliding body and the second sliding body during the opening and closing process of the lid 2 is kept approximately constant,
Both the first sliding body and the second sliding body are unlikely to undergo plastic deformation, and a stable braking effect can be obtained even when used for a long period of time. The reason why the thickness of the first sliding body 4 gradually becomes thinner toward the tip is to adjust the sliding resistance. When the lid 2 is in the fully open state, as shown in FIG. 3, the tip of the first sliding body 4 comes into contact with the standing wall 9, so that the lid 3 is prevented from rotating downward below the fully open state. . Although the present invention has been described above with reference to specific illustrated embodiments, the present invention is not limited to these embodiments, and various other embodiments are possible within the scope of the present invention.

For example, as shown in FIG. 5 (when the lid 2 is closed) and FIG. 6 (when the lid 2 is opened), a long hole 13 is provided at the lower end of the lid 2, and the first sliding body 4 is inserted into the long hole 13. A pin 14 provided at the base is fitted to make the lid 2 and the sliding body 4 rotatable. Therefore, during the process of opening and closing the lid 2, the first sliding body 4 is fitted into the second sliding body 6 without bending. Further, the braking mechanism according to the present invention can be used between members that can be separated horizontally, such as a vehicle ashtray, a cup holder, etc. that can be protruded from a case by the biasing force of a spring.

0010

[Effects of the Invention] According to the present invention, as the movable member moves away from the fixed member with an urging force, the force for braking the movable member is gradually increased between the pair of sliding bodies. This is achieved by increasing the sliding area of the sliding bodies, and the contact pressure between the sliding bodies is kept approximately constant, so there is little risk of plastic deformation of the sliding bodies unlike in the past, and even after long-term use. A stable braking effect can be obtained. Also,
Since no complicated braking device is used, the manufacturing process can be shortened.
This has the effect that manufacturing costs can also be lowered.

[Brief explanation of the drawing]

1 to 4 show embodiments according to the present invention.

[Fig. 1] A perspective view of a glove box.

FIG. 2 is a sectional view taken along line II-II in FIG. 1 when the lid is closed.

FIG. 3 is a sectional view taken along line II-II in FIG. 1 when the lid is opened.

FIG. 4 is a cross-sectional view taken along IV-IV in FIG. 2. Figures 5 and 6
shows another embodiment of the present invention.

FIG. 5 is a sectional view corresponding to FIG. 2 when the lid is closed.

FIG. 6 is a sectional view corresponding to FIG. 3 when the lid is opened. 7 to 9 show the prior art.

FIG. 7 is a schematic perspective view of the braking device.

FIG. 8 is a perspective view of the opening/closing lid in an open state.

FIG. 9 is a sectional view taken along line IX-IX in FIGS. 7 and 8.

[Explanation of symbols]

1 Glove box body 2 Lid 3 Hinge 4 First sliding body 6 Second sliding body

Claims (1)

[Claims] 1. A braking mechanism for a movable member that is separated from a fixed member with an urging force, wherein one of a pair of sliding bodies that contact each other is provided on the fixed member and the other is provided on the movable member,
A braking mechanism configured such that as the movable member moves away from the fixed member, the contact pressure between the sliding bodies remains substantially constant and the contact area between the sliding bodies gradually increases.