JPH0315742Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a lid hinge that simplifies the pivoting of the lid mounting part to cases that are attached to audio racks and other box bodies, and also makes it possible to smoothly open and close the lid. Regarding.

In conventional hinges for lids of audio racks and other boxes, for example, as shown in Japanese Utility Model Application Publication No. 53-91501, the mounting part of the lid is pivoted to the case that is attached to the box. A pin is inserted through the overlapping part of the mounting part to prevent the parts from separating, and one end of the pin is caulked to prevent the parts from separating. Therefore, it is necessary to swage one end of the pin, but the number of parts increases, resulting in a disadvantage that the assembly process requires more effort. If the caulking is insufficient, the pins will separate during use, while if the caulking is too strong, problems such as a lack of smoothness in opening and closing the lid will occur. Additionally, the lid hinge shown here is equipped with a spring between the case and the lid attachment part to assist in opening and closing the lid, but the lid may close suddenly due to the force of the spring and the gravity of the lid. The frictional force to prevent the lid from moving in the opposite direction is obtained by a spring washer interposed by inserting the aforementioned pin between the overlapping portion of the case and lid mounting portion. For this reason, the frictional force is always constant, so if it is large, the lid will not move smoothly when it is raised, and if it is small, when the lid is lowered and its rotational moment becomes large, the lid will move smoothly. The problem is that the value decreases rapidly.

The present invention has been devised in view of these conventional problems, and includes a case having a concave cross-section and side walls on both sides of the back wall, the axis of which is parallel to one side of the back wall, and It has a semicircular cross section, with its convex curved side facing the outside of the case, and has a bearing part that protrudes in the same direction as the side wall, and a pipe-shaped shaft inserted into this bearing part, and a tangential outer surface of the shaft. Consists of a protruding part that protrudes in the direction of separation, a supporting part that is bent outward from the case and provided away from the shaft from the tip, and a lid attachment part provided at the tip of the supporting part. The rotating body is formed by bending from one plate, and this rotating body is a coil spring placed inside the case, and the lid is biased toward the mounting portion in the direction of the bearing and relative to the axis of the shaft. The main point is the hinge for use.

The details of the lid hinge according to the present invention will be further explained based on the accompanying drawings. In the figure, 1 is a case formed by bending a metal plate, and this is a case in which side walls 3 are erected almost perpendicularly to the three sides of a rectangular back wall 2, and the back wall has no side walls 3. The side of the wall 2 has a semicircular cross section that protrudes in the direction in which the side wall 3 is erected, and its axis is in the same direction as the facing direction of the side walls 3, and the convex curved side is the case 1. A bearing portion 4 is integrally provided on the outside. At this time, it is also possible to attach the bearing part 4 formed separately from the case 1 to the back wall 2. A is a rotating body,
This is a pipe-shaped shaft 5 fitted into the bearing part 4.
, a protrusion 6 provided on the outer surface in the tangential direction so as to protrude in a direction away from the protrusion 6 , a support 7 bent outward of the case 1 provided at a distance from the shaft 5 from the tip thereof, and a support It is comprised of a lid attachment part 8 which is approximately perpendicular to the tip of the part 7 and bent toward the bearing part 4 side, and a plurality of lid attachment holes 9 are provided in the attachment part 8. The rotating body A is formed by bending a single metal plate or the like. The protruding part 6 of this rotating body A is protruded from the shaft 5 so as to be closer to the back wall 2 when it is parallel to the back wall 2, and the protruding part 6 is perpendicular to the back wall 2. The length is such that the support part 7 protrudes outside the bearing part 4 when the bearing part 7 is oriented in the same direction. In this embodiment, coil spring 1
A spring receiver 11 made of synthetic resin is interposed between the support portion 7 and the support portion 7 and is disposed within the case 1.
A protruding wall 12 is provided at both ends of the shaft 5 in the axial direction to prevent the support portion 7 from moving in the axial direction of the shaft 5. The rotating body A is biased by the coil spring 10 toward the bearing section 4 and closer to the mounting section 8 than the axis of the bearing section 4 . Further, in this embodiment, the end of the coil spring 10 is fitted into a recess provided on the surface of the spring receiver 11 facing the coil spring 10. 1 and 2 show a state in which the lid is closed, and in this case, the support portion 7 is attached to the spring receiver 11.
When the lid is opened, the rotating body A rotates as shown by the dashed line in FIG. 2, and the protrusion 6 comes into contact with the bearing 4. In addition, 13
The locking protrusions are provided on both ends of the shaft 5 of the spring receiver 11 in the axial direction, and are fitted into elongated holes 14 provided in the opposing side walls 3, 3. Also, 1
Reference numeral 5 denotes a fastening plate protruding outward from opposing side walls 3, 3 of the case 1 for attaching the case 1 to an audio rack or other box body.

Here, the spring receiver 11 may be made of metal, and the entire case 1 together with the bearing portion 4 may be made of synthetic resin.

In the embodiment shown in FIGS. 1 and 2, the mounting portion 8
is attached to the circumferential surface of the lid, but as shown in FIG. As shown, the mounting part 8 can be formed into a U-shaped cross section, and the end of the lid inserted into the mounting part 8 can be fixed with a set screw 16, if the lid can be attached to it. It can be formed in various ways.

Next, FIG. 6 shows another embodiment in which the spring receiver 11 is attached to the case 1. What is shown here is a protrusion 17 that protrudes inward from the opposing side walls 3, 3 of the case 1 and has a length similar to that of the elongated hole 14 that is provided long in the axial direction of the coil spring 10.
It is engaged with a groove 18 provided in the spring receiver 11.

Alternatively, as shown in FIG. 7, the spring receiver 11 can be supported by support pieces 19 bent inward at the edges of the opposing side walls 3, 3 of the case 1. Furthermore, in the embodiment shown in FIGS. 1 and 2, the shaft 5 is prevented from coming off from the bearing part 4 by a projecting wall 12 provided on the spring receiver 11, but in the embodiment shown in FIG. 8 and FIG. As shown, it is also possible to provide receiving sides 20 projecting inward at both ends of the bearing portion 4 in the axial direction. Further, as shown in FIG. 10, a protrusion 21 provided on the inner surface of the bearing portion 4 can be inserted into a locking groove 22 provided on the outer surface of the shaft 5 in the circumferential direction.
Further, as shown in FIG. 3, it is preferable to hold both ends of the bearing part 4 by bending the edges of the side walls 3, 3, so that the bearing part 4 can be reinforced. In addition, 23 is a box body, and 24 is a lid.

As shown by the dashed lines in FIGS. 2, 4, and 5, these hinges attach the case 1 to the upper part of the side wall of the box body 23 via the fastening plate 15, and also attach to the mounting portion 8. Attach the lid 24 to the When the lid 24 is closed, the first fiber and the support portion 7 become almost horizontal, compressing the coil spring 10, as shown in FIG. Since the rotation moment of the lid 24 is maximum,
The lid 24 maintains the closed state by compressing the coil spring 10 by its gravity.

When opening the lid 24, the free end of the lid is slightly lifted, and at that time, the elasticity of the coil spring 10 rotates the rotating body A via the support 7 and the protrusion 6, and the force that lifts the lid 24 is generated. Therefore, the lid 24 can be lifted easily. And lid 2
As the number 4 rises, its center of gravity moves to the hinge side,
After the force of the coil spring 10 overcomes the gravity of the lid, the lid 24 is lifted up via the rotating body A only by the elasticity of the coil spring 10, as shown by the dashed line in FIG. However, the bearing part 4 and the shaft 5
Since a frictional force is generated therebetween, the lid 24 gradually rises, and then the protrusion 6 comes into contact with the bearing 4 and stops. At this time, the spring receiver 11 and the case 1
If the side walls 3, 3 are joined together, this frictional force can also be used as a braking force for the lid 24.

When closing the lid 24, it is pushed down against the force of the coil spring 10, but as the lid 24 is lowered, the turning moment increases, so the lid 24 can be lowered easily and the lid 24 can be lowered. Since it is always supported by the force of the coil spring 10, it does not descend suddenly, and when it approaches the horizontal position, it naturally and quietly stops and maintains that state.

This hinge opens and closes the lid 24 in this way, and a pipe-shaped shaft 5 is integrally formed with a support part 7 and a mounting part 8 via a protrusion 6. The cross section provided integrally or separately on one side of the back wall 2 of the case 1 is semicircular, and its axis is in the same direction as the facing direction of the side walls 3, and the convex curved side is the side of the case 1. 1, and is pressed against the inner surface of the bearing part 4 by the coil spring 10 via the protrusion part 6, the support part 7, and the spring receiver 11, and is prevented from coming out into the bearing part 4. It has been arranged. That is,
All assembly is completed by fitting the shaft 5 into the bearing portion 4 and placing the spring receiver 11 and coil spring 10 into the case 1. Instead of using a solid rod, the shaft 5 is formed into a pipe shape, and the protruding part 6, supporting part 7, and mounting part 8 connected thereto are bent from a single plate and integrally formed. from,
The number of parts is reduced. Therefore, not only does assembly work become easier and more efficient, reducing costs, but there is also a difference in the way the pins are crimped, unlike conventional hinges in which the shaft pin is swaged into the case. It can solve all the problems that arise due to this.

Since the shaft 5 is made into a pipe shape by bending the plate, its diameter can be increased without increasing the weight as would be the case when a solid rod-shaped shaft is used. Coupled with the fact that the entire length in the axial direction can be brought into contact with the bearing part 4,
The contact area with the bearing part 4 in the circumferential direction can be increased, and by changing the difference in radius between the shaft 5 and the bearing part 4, the contact area of the shaft 5 with the bearing part 4 in the circumferential direction can be changed. , it becomes possible to provide the optimal hinge according to the weight and size of the lid. Also, the weight of the lid when it opens and closes and the coil spring 1
Since the frictional force between the bearing part 4 and the shaft 5, which acts as a braking force to prevent sudden movement of the lid due to zero force, can be increased, the lid can be opened and closed quietly, and sudden movement of the lid can be reliably prevented. be able to.

The frictional force between the bearing portion 4 and the shaft 5 is
This is caused by being pressed against the bearing part 4 by the force of the coil spring 10. That is, this frictional force is generated by the force of the coil spring 10. Therefore, when the lid is opened, the center of gravity is on the shaft 5 side, and the force of the coil spring 10 required to lift the lid and the rotational moment of the lid are relatively small, and the bearing part acts as a braking force against it. When the frictional force between the bearing part 4 and the shaft 5 is small, the coil spring 10 is expanded and its force is small, so the frictional force between the bearing part 4 and the shaft 5 becomes small, and the shaft 5 It rotates smoothly and the lid is easy to operate. Conversely, when the lid is being lowered or at the beginning of its ascent, the force of the coil spring 10 and the rotational moment of the lid required to lift the lid are large, and the bearing 4 acts as a braking force against the shaft 5.
When a large frictional force between the two is required, the coil spring 10 is compressed to increase its force, which increases the frictional force and reliably prevents the lid from falling suddenly due to its gravity. It can be done. As described above, as the state of the coil spring 10 changes depending on the state of the lid opening/closing operation, the frictional force between the bearing portion 4 and the shaft 5 changes, and this change is caused by the gravity of the lid and the coil spring. Since the lid moves in parallel with the force of 10, it is possible to prevent the lid from moving suddenly when opening and closing, and to move it smoothly and quietly.

In addition, since the mounting part 8 side is biased in the direction of the bearing part 4 rather than the axis of the shaft 5 of the rotating body A, there is no risk of the lid dropping suddenly. It is also effective in preventing damage to the body and lid.

[Brief explanation of the drawing]

Figure 1 is a front view of the lid hinge according to the present invention;
Fig. 2 is a longitudinal side view of the same, Fig. 3 is a longitudinal sectional front view of another embodiment with the mounting part omitted, and Figs. 4 and 5 are partial cross sections showing other embodiments of the mounting part. A side view, FIGS. 6 and 7 are cross-sectional plan views showing other embodiments of the spring receiving portion, FIG. 8 is a longitudinal sectional front view of yet another embodiment in which the mounting portion is omitted, and FIG. FIG. 10 is a longitudinal sectional side view showing another embodiment of the bearing portion and the shaft portion. A: rotating body, 1: case, 2: back wall, 3: side wall, 4: bearing section, 5: shaft, 6: protruding section, 7: supporting section, 8: mounting section, 9: mounting hole, 10: Coil spring, 11: Spring receiver, 12: Protrusion, 13: Locking protrusion, 14: Long hole, 15: Fixing plate, 16: Set screw, 17: Projection, 18: Concave groove, 19: Support piece ,2
0: Receiver piece, 21: Projection, 22: Locking groove, 23: Box body, 24: Lid.

Claims (1)

[Scope of utility model registration request] The case 1 has a concave cross section and has side walls 3, 3 on both sides of the back wall 2.The back wall 2 has an axis parallel to that side, and has a semicircular cross section, with the convex curved side facing the case 1. A pipe-shaped shaft 5 is placed in the bearing part 4 and has a bearing part protruding in the same direction as the side walls 3, 3.
a protrusion 6 that protrudes in a direction away from the protrusion 6;
The rotary body A consists of a support part 7 bent outward of the case 1 provided at a distance from the shaft 5 from its tip, and a lid attachment part 8 provided at the tip of the support part 7, which is a single plate. The rotating body A is bent from the body, and this rotating body A is a coil spring 1 arranged in the case 1.
0, the lid hinge is biased in the direction of the bearing part 4 and on the mounting part 8 side with respect to the axis of the shaft 5.