JPH0689773B2 - Hinge device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hinge device that is attached to a hinge portion of a door or a lid that opens and closes by being rotated, and has a cushioning action to mitigate an impact at the time of opening and closing.

[Prior Art] A hinge device of this type is attached to a hinge portion such as a door or a lid, and is required to be relatively small. Conventionally, there is a device that cushions by sliding contact between a cam and a slider. It is used. A conventional hinge device has a structure in which a cam is provided in a radial direction of an outer circumference of a shaft that rotates when a rotary member such as a door and a lid is opened and closed, and a slider is in sliding contact with a cam surface of the cam from the outer circumference side. Further, a spring that presses the slider against the cam is provided coaxially with the slider, and when the cam rotates due to the rotation of the shaft, the slider and the cam slide against each other against the spring force to buffer the opening and closing.

[Problems to be Solved by the Invention] However, since the conventional hinge device has a structure in which the shaft, the cam, and the slider cannot be combined into one unit as a single hinge device, the mounting is troublesome and the slider is Since it is provided on the outer peripheral side of the cam, it is large in size, which becomes an obstacle when it is attached to a hinge portion such as a door or a lid. In addition, the entire structure is complicated and prone to failure, and since the slider and the cam are provided in the intersecting direction, the operating angle is limited.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a hinge device that can be unitized, has a small size and a simple structure, and has no restriction on an operating angle.

[Means for Solving the Problems] A hinge device of the present invention that achieves the above-mentioned object is provided with a shaft having an attachment portion for attaching to a mating member at one end thereof, and the shaft being movable in the axial direction while being restrained from rotating. The attached slider, a spring externally attached to the shaft to urge the slider to move in the axial direction of the shaft, and the other end of the shaft are attached to the other end so as to be relatively rotatable. A cam provided with a mounting portion for attaching to another mating member and having a cam surface for moving the slider in a direction in which the slider slides in the axial direction of the shaft and bends the spring with relative rotation of the shaft. And one of the mating members is a rotating member and the other is a fixed member.

[Operation] Since the present invention has the above-described structure, the slider, the spring, and the cam are incorporated into one shaft, and the cam and the shaft are unitized as a single hinge provided with a mounting portion to a mating member. ing.

When the shaft relatively rotates due to the rotation of the rotating member, the slider pressed by the cam by the spring moves in the axial direction of the shaft while bending the spring while sliding on the cam surface. The resistance caused by the sliding of the cam and the slider acts as a buffer.

[Embodiment] FIGS. 1, 2 and 3 show an embodiment of the present invention in which a slider 3 and a coil spring 4 are attached to a shaft 1. The shaft 1 is attached to a rotary member (not shown) such as a door or a lid as a rotary member, and rotates integrally with the opening / closing operation of these members. Therefore, the right end side of the shaft 1 is notched in parallel, and the notch 9 is attached to the rotating member. Further, the left end side of the shaft 1 is inserted into the cam 2 in a freely rotatable state. The cam 2 is integrated with a mounting piece 11 having a mounting hole 8. By mounting the mounting piece 11 on a fixed member with a screw or the like, the cam 2 is fixed as a fixed side member. At this time, the mounting piece 11 may be provided by extending the cam 2, or may be formed by a member separate from the cam 2 and fixed to the cam 2 by an appropriate means. In order to prevent the cam 2 and the shaft 1 from being separated from each other, a retaining pin 7 is inserted in the shaft 1 portion outside the cam 2. With such a structure, the cam 2, the slider 3, and the coil spring 4 are provided on the axis of the shaft 1, that is, on the same axis, so that the overall size can be reduced.

The slider 3 rotates integrally with the shaft 1 and is attached to the shaft 1 so as to be movable in the axial direction of the shaft 1. Further, the coil spring 4 is externally attached to the shaft 1 and biases the slider 3 toward the cam 2. In the figure, 5 is a stopper with which the right end side of the coil spring 4 abuts, and is attached to the shaft 1 by a pin 6 in a state where it does not come off. Here, the slider 3 is formed with a protruding piece 3a, a part of which protrudes in the direction of the cam 2.
The protrusion 3a is in sliding contact with the cam surface 10 of the cam 2. Cam surface
As shown in the figure, 10 is formed into a substantially arcuate taper between the valley portion 2a and the top portion 2b, and the protrusion 3a of the slider 3 is formed on the cam surface.
When the slider 10 slides, the slider 3 moves in the direction of the coil spring 4 along the shaft 1, and the movement of the slider 3 causes the coil spring 4 to bend. Therefore, the movement stroke of the slider 3 due to the rotation of the shaft 1 is obtained by the protrusion 3a sliding between the valley portion 2a and the top portion 2b of the cam surface 10, and the deflection amount and the load of the coil spring 4 are determined by the slider. The protrusion 3a of 3 is a valley 2a of the cam surface 10.
To gradually increase by sliding to the top portion 2b, and become maximum when the protrusion 3a reaches the top portion 2b of the cam surface 10. Due to the increase in the load of the coil spring 4, the pressing force of the slider 3 against the cam surface 10 increases, and the sliding resistance of the slider 3 on the cam surface 10 increases. Due to the sliding resistance of the slider 3, the rotational force applied to the shaft 1 is absorbed, abrupt rotation of the shaft 1 is blocked, and a cushioning action is provided. Further, the cam surface 2 is formed with a step portion 2c which prevents the slider 3 from rotating in the opposite direction. Therefore, the forward / reverse rotation of the shaft 1 is possible within the sliding range of the valley portion 2a and the top portion 2b of the cam surface 10 by the protruding piece 3a of the slider 3, and the shaft 1 is not blocked by the step portion 2c in one direction. Rotation is possible without any restriction on the rotation angle. In the case of one-sided rotation, each time the protruding piece 3a of the slider 3 slides on the cam surface 10, a cushioning action is obtained.

Next, the operation will be described with reference to FIGS. 1, 2, and 4.

FIG. 1 and FIG. 2 show a stationary state of the rotating member, so that the protrusion 3a of the slider 3 comes into contact with the step portion 2c of the cam 2 and is positioned at the valley portion 2a of the cam surface 10 by the pressing of the coil spring 4. Is in sliding contact with. When the rotating member is rotated, the shaft 1 is rotated together, and the slider 3 is rotated integrally with the rotation of the shaft 1. The slider 3 is pressed in the direction of the cam 2 by the coil spring 4, but when the slider 3 rotates, its protruding piece
3a slides on the cam surface 10 of the cam 2. The cam surface 10 has an arcuate taper that increases toward the right, and the protruding piece 3a
When slides on the cam surface 10, the slider 3 moves rightward on the shaft 1 while bending the spring 4 against the coil spring 4, as shown in FIG. Reach The resistance of the slider 3 when it slides along the cam surface 10 buffers the rotation of the rotating member and prevents the rotating member from rotating rapidly. The rotating member can be rotated in the normal and reverse directions within the sliding range of the protruding piece 3a. The buffer force is the cam surface 10
Can be adjusted within an appropriate range by changing the inclination of and the spring force of the coil spring 4.

The rotating member can also rotate in one direction without being blocked by the stepped portion 2c of the cam. In this case, each time the protrusion 3a slides on the cam surface 10, a cushioning action is obtained.

Since the cam 2, the slider 3, and the coil spring 4 are provided in the axial direction of the shaft 1 in this embodiment, the size is small, the number of parts is small, and the structure is simple.
There is no limit on the rotation angle. Further, since the buffering force is determined by the shape of the cam surface and the spring force of the coil spring, its variation is reduced. In the present embodiment, the shaft 1 is the rotating side member that is attached to the rotating member and the cam 2 is the fixed side member that is attached to the fixed member. On the contrary, the shaft 1 is the fixed side member that is attached to the fixing member, and the cam 2 is It may be a rotating member attached to the rotating member.

As described above, according to the present invention, the cam attached to the rotating member or the fixed member, the slider slidingly contacting the cam, and the spring for pressing the slider in the cam direction are provided in the axial direction of the shaft. Since the sliding resistance of the slider to the cam surface of the above is used for cushioning, these slider, spring, and cam are incorporated in one shaft, and the cam and shaft are each provided with a mounting portion for a mating member, It is unitized as a hinge, and its attachment is extremely easily performed via the attachment portion.

Further, the present invention has a small number of parts, has a simple structure, can be downsized, and exerts a cushioning effect without imposing a limit on a rotation angle. Further, the cushioning force can be easily adjusted, and the hinge device can be used as a practical device.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIGS. 2 and 3 are bottom views and left side views thereof, and FIG. 4 is a front view showing an operating state. 1 ... Shaft, 2 ... Cam, 3 ... Slider, 4 ... Coil spring, 5 ... Stopper, 6,7 ... Pin, 10 ... Cam surface.

Claims (1)

[Claims] 1. A shaft having a mounting portion for mounting to a mating member at one end, a slider rotatably restrained by the shaft and movably mounted in an axial direction, and a slider externally mounted on the shaft for mounting the slider on the shaft. A spring for urging the slider so as to move in the axial direction of the shaft, and an externally attached externally attached member that is fixed to the other end of the shaft so as to be relatively rotatable. And a cam having a cam surface that slides in the axial direction of the shaft and moves the slider in a direction in which the spring is bent in accordance with relative rotation of the shaft, and one of the mating members is a rotating member. A hinge device characterized in that the other is a fixing member.