JPH07237655A - Lid opening and closing device - Google Patents

Abstract

PURPOSE:To remove the limitation or restriction on the working of an opening and closing mechanism, contrive the improvement of the durability in terms of the opening action to miniaturize a lid opening-closing device. CONSTITUTION:When a lid is opened by a coil spring while a gear 12 and a pinion respectively provided on a lid 10 and a body 20 are being meshed together, since a rotary damper 24 develops a resistance force to the rotation of the pinion and on account of the gear ratio, the opening and closing force is determined by the coil spring, while the damping force is determined by the rotary damper 24. For this reason, the freedom of the design can be made large and the lid 10 and the body 20 open slowly while maintaining the mutual moderate action in order to avoid impact upon opening and permit the durability to be improved. Moreover, since the gear 12 is formed into an arcuate shape with its center at an opening and closing hinge 21, a simple structure suffices to serve the purpose.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid opening / closing device for automatically opening / closing a lid of an automatic processor or the like.

[0002]

2. Description of the Related Art Conventionally, there are various types of mechanisms for automatically opening and closing a lid that is rotated around a support shaft to be opened and closed. Although there is a tumbler mechanism that opens and closes by spring bias, there is a tumbler mechanism that uses an oil or air damper in order to keep the opening and closing speed smooth.

[0003]

By the way, the damper used in the above-mentioned conventional automatic opening / closing mechanism is of the piston type, but in that case, the opening / closing angle is limited to about 60 degrees at maximum due to the mechanism. This may result in serious damage to operability and usability. In addition, the size of the damper is restricted due to the limitation of the mounting space, which limits the setting of the opening / closing force and the dumping force.

The present invention has been made in view of such conventional problems, and provides a small and compact lid opening / closing device by eliminating restrictions and limitations of the opening / closing mechanism and improving durability by the opening operation. With the goal.

[0005]

Therefore, the present invention is to solve the above-mentioned conventional problems, and is characterized by a releasable locking mechanism for locking the lid in the closed position at the closed position. An urging member that is interposed between the main body and the lid and urges the lid in the opening direction, a gear that is attached to one member of the main body or the lid, and is concentric with the support shaft, and the main body or A pinion that is axially supported by the other member of the lid and that meshes with the arc-shaped gear, and is mounted on the other member, and the rotation shaft is connected to the rotation shaft of the pinion to resist the rotation. And a rotary damper that generates

Here, the pinion may have a smaller diameter than the concentric arc gear. Further, the lid may be provided with the concentric arc-shaped gear, and the main body may be provided with the pinion and the rotary damper. Further, the lid opening / closing device may be provided at the photosensitive material loading port of the automatic developing machine.

[0007]

According to the lid opening / closing device having the above-mentioned structure, when the lid and the gear provided on the main body and the pinion are meshed with each other and the opening operation is performed by the biasing member, the rotary damper generates a resistance force against the rotation of the pinion. Therefore, since the opening / closing force is determined by the biasing member and the dumping force is determined by the rotary damper in relation to the gear ratio, the degree of freedom in design can be increased. Then, the lid and the main body can be slowly opened while having a moderation, and the impact at the time of opening can be eliminated to improve the durability. Furthermore, since the gear is formed in an arc shape centered on the spindle, a simple structure can be used.

If the diameter of the pinion is smaller than that of the concentric arc gear, the rotary damper may be small, and the entire body can be compactly housed inside the main body. Further, in the case where the pinion and the rotary damper are provided on the main body side, the position of the rotary damper is fixed and it is possible to protect from vibration and impact as compared with the case where the lid is provided.

Further, in the case where the lid opening / closing device is provided at the photosensitive material loading port of the automatic developing machine, since the degree of freedom in design is great, it is necessary to assume opening / closing sections of various shapes and sizes like the automatic developing machine. Suitable for devices that must not.

[0010]

EXAMPLE An example of the present invention will be described below. In addition,
The embodiment described below is a lid opening / closing device that can be divided into upper and lower parts by using a hinge as a spindle, and a gear is arranged on the lid. 1 and 2 are schematic sectional views of a lid opening / closing device according to an embodiment of the present invention, and FIG. 2 shows a state in which the lid opening / closing device is divided into two parts.

An opening / closing hinge 21 is provided above the right end of the lid opening / closing device 1, and the lid 10 and the main body 20 can be opened / closed centering on the opening / closing hinge 21. The gear 12 screwed to the right end of the lid 10 is formed in an arc shape centering on the opening / closing hinge 21 and is integrally molded with the locking portion 11 with resin. The length of the circular arc may be determined according to the specifications of the opening / closing angle desired by the device, which increases the degree of freedom in design. The hook 13a is provided at the left end of the lid 10, and engages with an engaging portion 13b also provided at the left end of the main body 20 to lock the opening of the lid 10.

The coil spring 23 has one end locked to the locking portion 22 at the substantially central portion of the main body 20, while the other end is locked to the locking portion 11 of the lid 10, and the lid 10 is pulled by a pulling force in the arrow direction. Is urged in the opening direction. A pinion 25 is rotatably attached to an output shaft (not shown) of the rotary damper 24, and is screwed to the upper right end of the main body 20 at a position where the pinion 25 meshes with the gear 12 of the lid 10. Therefore, the pinion 25 rotates according to the opening / closing operation of the lid 10. The interior of the rotary damper 24 has a structure in which gears or blades are provided on an output shaft inside a housing in which oil is sealed, and a predetermined rotation resistance is generated when the output shaft rotates.

Next, the opening / closing operation of the lid 10 in the lid opening / closing device 1 will be described. First, when the user disengages the hook 13a and the engaging portion 13b to open the lid 10,
The lid 10 tries to open by the pulling force of the coil spring 23 around the opening / closing hinge 21, but the action of the rotary damper 24 causes the pinion 25 to have resistance and the arc-shaped gear 1
Since the lid 10 rotates while being meshed with the lid 2, the lid 10 is slowly opened, and the stopper 13 abuts on the lid frame 26 provided on the main body 20 and stops at the open position. As described above, by using the rotary damper 24 as the damper of the lid opening / closing device, it is possible to eliminate the impact when the lid is opened and improve the durability. Further, by selecting the gear ratio between the gear 12 and the pinion 25, the opening / closing force depends on the coil spring 23, while the dumping force depends on the rotary damper 24, so that the degree of freedom in design can be increased.

Since the gear 12 is formed in an arc shape centering on the opening / closing hinge 21 as described above, the pinion 25 can be rotated with the pinion 25 fixed at a predetermined position, in other words, the fixed rotary. Since it can be directly connected to the output shaft of the damper 24, the structure can be simplified and high reliability can be obtained. When closing the lid 10, the user may close the lid 10 against the force of the coil spring 23 and engage the hook 13a with the engaging portion 13b.
In this case, the lid 10 can be roughly closed depending on the user, but since the rotary damper 24 is provided on the main body 20 side, the impact is less than that provided on the lid 10 side.

As described above, in the present embodiment, the respective constituent elements are arranged on the lid on the upper side and the main body on the lower side, but the constituent elements may be arranged on either the upper side or the lower side as long as the devices can be opened and closed with each other. Further, in this embodiment, the tensile force of the coil spring was used as the biasing means, but instead of the coil spring, a shape such as a leaf spring may be selected, or a material such as a rubber material may be selected. Pressing force may be used instead of these tensile forces.

[0016]

As described above, when the lid and the gear provided on the main body and the pinion are meshed with each other and the opening operation is performed by the biasing member, the rotary damper generates a resistance force against the rotation of the pinion. , The opening / closing force is determined by the biasing member and the dumping force is determined by the rotary damper in relation to the gear ratio, so that the degree of freedom in design can be increased. Then, the lid and the main body can be slowly opened while having a moderation, and the impact at the time of opening can be eliminated to improve the durability. Furthermore, since the gear is formed in an arc shape centering on the support shaft, a simple structure can be used.

If the pinion has a diameter smaller than that of the concentric arc gear, the rotary damper may be small, and the entire body can be compactly housed inside the main body. Further, in the case where the pinion and the rotary damper are provided on the main body side, the position of the rotary damper is fixed compared to the case where the pinion and the rotary damper are provided, and it is possible to protect from vibration and impact.

Further, in the case where the lid opening / closing device is provided at the photosensitive material loading port of the automatic developing machine, since the degree of freedom in design is great, opening / closing sections of various shapes and sizes like the automatic developing machine must be assumed. Suitable for devices that must not.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a lid opening / closing device according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view of a lid opening / closing device according to an embodiment of the present invention.

[Explanation of symbols]

 10 Lid 11 Locking Part 12 Gear 13a Hook 13b Engaging Part 20 Main Body 21 Opening / Closing Hinge 23 Coil Spring 24 Rotary Damper 25 Pinion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuyoshi Shimono 2-51-1, Kitaitami, Itami City, Hyogo Prefecture FC Manufacturing Co., Ltd.

Claims (4)

[Claims] 1. An opening / closing device for a lid which is opened / closed by pivoting around a support shaft with respect to a main body, wherein a releasable lock mechanism locks the lid in a closed position at a closed position, the main body and the lid. A biasing member that is interposed between the main body and the lid to urge the lid in the opening direction; a gear that is attached to one member of the main body or the lid and is concentric with the support shaft; and the other of the main body or the lid. And a pinion that is axially supported by the member and meshes with the arc-shaped gear, and is attached to the other member, and the rotation shaft is connected to the rotation shaft of the pinion to generate a resistance force against the rotation. A lid opening / closing device characterized by including a rotary damper and. 2. The lid opening / closing device according to claim 1, wherein the pinion has a smaller diameter than the concentric arc gear. 3. The lid opening / closing device according to claim 1, wherein the lid is provided with the concentric arcuate gear, and the main body is provided with the pinion and a rotary damper. 4. The lid opening / closing device according to claim 1, wherein the lid opening / closing device is provided at a photosensitive material loading port of an automatic developing machine.