JPH108809A - Cover return prevention mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a cover of a case from closing due to spring back or by its own weight when the cover is opened, and to make it possible to close the cover without manual unlocking operation when the cover is to be closed. SOLUTION: One end of a hinge 8 is secured to a cover while its other end is connected with projection-recess relationship to a support port 2 attached to a case 9. The hinge 8 is fold upward with a torsion spring 6 through an arm 7. As the cover is opened, the hinge 8 rotates about a pivot section 3. When the cover reaches a specified opening position, a bent portion 11 enters a corner portion 10 to prevent the cover tram closing. When the cover is closed, the bent portion 11 is sprung back in the direction opposite the opening direction by means of the hinge 8 so that the hinge 8 may move in the opposite direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover return preventing mechanism for preventing a cover from returning when a rotatable cover attached to a housing is opened.

[0002]

2. Description of the Related Art A conventional cover return prevention mechanism of this kind is
For example, it is described in Japanese Utility Model Laid-Open Publication No. Sho 61-72884, and FIG. 5 is a perspective view showing a conventional cover return preventing mechanism according to this description.

In FIG. 5, 101 is a housing, 102 is a door, 103 is an arm attached to a predetermined position inside the door 102 by screw fixing or welding, etc., 103a, 103b
Is a bearing formed on both sides of the arm 103, 104 is an arm attached to a required position on the front upper wall of the housing 101 by screw fixing or welding or the like, and 104a is a bearing formed on one end of the arm 104. The portion 104a and the bearing portion 103a have the same axis and are continuous.

Reference numeral 105 denotes a rotating shaft passing through the bearing 103a and the bearing 104a, and the door 102 is rotatably connected to the housing 101 by the rotating shaft 105. Reference numeral 106 denotes a retaining E-ring provided at the lower end of the rotary shaft 105, and reference numeral 107 denotes a spacer mounted on the rotary shaft 105 between the bearings 103a and 104a. 108
Are fixed shafts passed through the bearing 103b of the arm 103;
9 is an E-ring fixed in the middle of the fixed shaft 108, 110 is a fixed shaft 10 between the E-ring 109 and the bearing 103b.
8, which constantly pushes the fixed shaft 108 upward through the E-ring 109.

[0005] Reference numeral 110 denotes a guide plate provided at the front in the upper wall of the housing 101. The guide plate 110 is disposed within the moving range of the fixed shaft 108 disposed on the bearing portion 103a of the arm 103.
The top of 8 is slightly pushed up. 112 is a fixed shaft 108
The upper part of the fixed shaft 108 that moves with the opening of the door 102 is fitted into the fixed hole 112.

[0006] As shown in FIG.
Is in contact with the front of the vehicle and the door is closed. This door 102
Is rotated, the upper end of the fixed shaft 108 slides on the guide plate 111 to rotate similarly. Assuming that the door 102 is opened at an angle, for example, 90 °, the fixed shaft 108 moved 90 ° together with the door 102 is located in the fixing hole 112. At this time,
The fixed shaft 108 is pushed upward by the action of the coil spring 110, and the upper part thereof is engaged with the fixing hole 112, and the door 1 is closed.
02 will be fixed.

[0007]

In the above-mentioned prior art, the fixing shaft automatically enters the fixing hole by the force of the spring and engages with the fixing hole. Lock completely. In addition, since the fixed shaft is always engaged with the fixing hole by the spring, there is a problem that the fixed shaft must be manually pressed when closing the cover.

According to the present invention, when the cover of the housing is opened, the cover is suppressed to the extent that it does not close due to the recoil of the cover or its own weight, and when closing, the cover is closed without manually releasing the lock. The purpose is to: Further, when the cover is opened and excessive force is applied, the cover is detached from the housing. However, it is another object of the present invention to be able to mount the cover again without manually moving the lock portion when mounting the cover on the housing again.

[0009]

According to the present invention, a cover return preventing mechanism is fixed to an end of a housing, a support portion serving as a center of opening and closing rotation of the cover of the housing, and one end is fixed to the cover and the other end is fixed to the cover. A hinge that is loosely coupled to the support portion and moves in the opening and closing direction about the support portion when the cover is opened and closed; and a hinge that follows the hinge when the cover is opened so that the hinge does not move in the opposite direction. When the cover is closed and the cover is closed, an arm that rebounds so that the lock is released by rotating the hinge about the support portion is provided.

According to the present invention, when the cover is opened, the arm has a constant force applied to the hinge attached to the cover in order to prevent the cover from returning due to its own weight or rebound. When the cover is opened, the hinge rotates and the arm moves to follow the hinge. When the cover opens completely and the angle changes, the arm enters and locks.

When the cover is closed, the hinge starts rotating and the arm is flipped back to release the lock.

[0012]

FIG. 1 is a perspective view showing an embodiment of the present invention, wherein 9 is a housing, and 1 is a cover. Numeral 8 denotes a hinge, whose right cross section shown in FIG. 1 is attached to the cover 1 by screws or the like, but this point is not shown. The other end of the hinge 8 has a convex shape, fits into the rotating part 3 of the concave supporting part 2 formed by molding, and is supported so as to be rotatable upward in FIG. With such a configuration, the cover 1 rotates about the rotating part 3 of the hinge 8 and opens and closes.

Reference numeral 7 denotes an arm, and a bent portion 11 is formed at the end portion 5 so as to be locked with the quad portion 10 of the hinge 8. The torsion spring 6 is attached to the end 5 which is the center of rotation, and the arm 7 always applies tension to the hinge 8 so as to follow the movement of the hinge 8. Further, reference numeral 4 denotes a rib which regulates the rotation of the arm 7.

Next, the operation of the present invention will be described with reference to FIGS. 2, 3 and 4 which are sectional views taken along the line Y--Y of FIG.

When the cover 1 is opened, the hinge 8 rotates about the rotating part 3 in the + a direction. Thus, the arm 7 is rotated by the torsion spring 6 in the + b direction around the end 5 because the hinge 8 is tensioned. As the hinge 8 rotates, the arm 7 comes to a position where the arm 7 approaches the corner 10 which is the end of the hinge 8. When the cover 1 is further opened, the hinge 8 rotates in the + a direction, and the bent portion 11 of the arm 7 enters the quad portion 10, and the hinge 8
The movement of the cover 1 in the -a direction is restricted, so that the cover 1 does not close due to its own weight or rebound, and work inside the cover can be performed.

When the cover 1 is closed and the cover 1 is moved in the closing direction, the hinge 8 starts rotating around the rotating part 3. Thereby, the bent portion 11 of the arm 7 is flipped by the hinge 8 in the −b direction, and the hinge 8
Can be moved in the −a direction, and can be rotated around the rotating unit 3 to close the cover.

As shown in FIG. 4, when the cover 1 is opened to a full opening angle or more when the cover 1 is opened, the hinge 8 and the support portion 2
Since it is indicated by a concave and a convex, it is detached by elastic deformation of the support portion 2 formed by the mold. Thus, the arm 7 is moved until it hits the rib 4 because the arm 7 is tensioned in the + b direction. The position of the hinge 8
Is a position where it can be attached to the support portion 2 again. Therefore,
When the detached cover 1 is attached, it can be attached without moving the arm 7.

[0018]

According to the present invention, when the cover is opened,
Since the hinge attached to the cover rotates and the arm following the hinge locks the hinge, the cover can be locked to the extent that the cover does not close due to its own weight or recoil.
Further, when the cover is closed, the arm that locks the hinge is flipped back by the rotation of the hinge and the lock is released, so that the cover can be closed without manually releasing the lock portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG. 1 taken along line YY.

FIG. 3 is a diagram showing a change in FIG. 2 when a cover is opened in the present invention.

FIG. 4 is a view showing a state of change in FIG. 2 when the cover is opened at a full opening angle or more in the present invention.

FIG. 5 is a perspective view showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover 2 Support part 3 Rotating part 4 Rib 5 End part 6 Torsion spring 7 Arm 8 Hinge 9 Housing 10 Cad part 11 Bending part 101 Housing 102 Door 103 Arm 103a, 103b, 104a Bearing part 105 Rotation axis 106, 109 E-ring 107 Spacer 108 Fixed shaft 110 Coil spring 111 Guide plate 112 Fixing hole

Claims (3)

[Claims] A supporting portion fixed to an end of the housing and serving as a center of opening and closing rotation of a cover of the housing; one end is fixed to the cover and the other end is loosely coupled to the supporting portion; A hinge that moves in the opening and closing direction around the support portion, and follows the hinge when opening the cover, enters until the hinge is locked at a predetermined position so as not to move in the opposite direction, and when closing the cover, An arm that rebounds so that the lock is released when the hinge rotates around a support portion. 2. The arm is tensioned by a torsion spring with respect to the hinge in the opening and closing direction of the cover, and the connection is performed by connecting the support portion and the other end of the hinge with each other by the tension. 2. The cover return prevention mechanism according to claim 1, wherein the mechanism is realized. 3. The support part is formed of a mold. When the cover is opened to the predetermined position or more, the connection between the support part and the hinge is released due to elastic deformation of the support part, and the arm is connected to the released hinge. 3. The cover return preventing mechanism according to claim 2, wherein the cover is moved by the tension to a position where the cover can be attached again.