JPH1016353A - Opening and closing cover mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening and closing cover mechanism excellent in repeating operation and constituted so that a lock member goes toward a closing position only by pressing an opening and closing cover when the cover is operated so as to be pressed from an open position to be closed and the opening and closing cover is locked. SOLUTION: An opening and closing cover mechanism comprises an opening and closing cover 1, a lock member 4 attached to the opening and closing cover 1 in a shakable manner, a guide part 7 provided to a machine body on a side to be opened and closed and guiding the lock member between the opened and closed positions of the opening and closing cover and an urging means 5 for urging the lock member 4 so as to hold the same to the opened and closed positions. When the opening and closing cover 1 is operated so as to be passed from the opened state to be closed, the lock member 4 allows the guide part 7 to go toward a closing position against the energizing force of the urging means 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing cover mechanism for supporting a main body of a facsimile apparatus or the like and an opening / closing cover rotatably opened / closed to the main body at an open position.

[0002]

2. Description of the Related Art Conventionally, in facsimile machines, copiers, printing machines, and other equipment, an opening / closing cover is provided at a position where replenishment, inspection, maintenance and the like of parts are required relatively frequently. Have been. For example, an opening / closing cover of a facsimile apparatus or the like is attached to the apparatus main body so as to be able to open and close in order to eliminate paper jams and exchange recording paper. The open / close cover usually needs to be stopped at the open position in order to eliminate paper jam or replace the recording paper. Therefore, the opening / closing cover is usually provided with an opening / closing cover mechanism for stopping at the open position.

[0003] As a conventional openable / closable cover mechanism, there is one using resin elasticity as shown in FIG. As shown in the figure, the opening / closing cover 51 is provided with a hinge pin 5 provided on the main body.
2 is openably and closably connected. A locking member 54 is swingably connected to the opening / closing cover 51 by a hinge pin 53. The locking member 54 is made of a plate-like resin material having elasticity. The locking member 54 has a long hole 57 along its longitudinal direction.
Is provided. Protrusions 55, 55 are provided on the inner wall of the long hole 57 on the side opposite to the hinge pin 53 so as to face each other. A pin 56 is provided on the main body (the body to be opened / closed). The pin 56 is inserted into the long hole 57 of the locking member 54.
Are slidably inserted.

When the cover 51 is set to the open position, the pin 56 located on the hinge pin 53 side of the elongated hole 57 of the locking member 54 moves relative to the elongated hole 57. The pin 56 rides over the projection 55 due to the elastic deformation of the locking member 54, and the pin 56
Will be located on the opposite side of. By the above, the pin 56
The locking member 54 is locked by the projection 55, and the opening / closing cover 51 is stationary at the open position.

[0005]

However, when the resin elasticity of the locking member 54 as shown in FIG. 4 is used, the locking member 54 repeatedly wears, wears, fatigues, etc. There has been a problem that the opening and closing of the 51 cannot be stopped at the open position.
In addition, there has been a problem that the function of the cover opening / closing mechanism varies due to the variation in component accuracy.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional drawbacks, to provide an excellent repetitive operation, and to operate the opening / closing cover from the open position to close the cover by simply pressing the cover to the closed position. Another object of the present invention is to provide an opening / closing cover mechanism in which the opening / closing cover is locked.

[0007]

In order to achieve the above object, the present invention provides an opening / closing cover, a lock member swingably attached to the opening / closing cover, and a lock member provided on a body to be opened / closed. A guide portion for guiding between the open / close positions of the open / close cover, and an urging means for urging the lock member to maintain the open / closed position, and when the open / close cover is pressed from the open position and closed. The lock member is configured to turn the guide portion toward the closed position against the urging force of the urging means. Further, the angle between the lock member in the open position and the guide portion is 90 ° or more. Further, the urging means is a tension spring stretched between the lock member and the opening / closing cover.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an embodiment of an opening / closing cover mechanism of the present invention (closed position).
FIG. 2 is a side view showing an embodiment of the opening / closing cover mechanism of the present invention (open position). FIG. 3 is a side view showing details of the operation of the interlock sensor shown in FIGS.
FIG. 4 is a side view showing a conventional opening / closing cover mechanism.

First, the structure of the opening / closing cover mechanism of the present invention will be described. As shown in FIGS. 1 and 2, a cover 1 that opens and closes is connected to a hinge pin 2 provided on a main body, which is a body to be opened and closed, so as to be openable and closable. A lock member 4 is swingably connected to the opening / closing cover 1 by a hinge pin 3. A tension spring 5 is attached between the lock member 4 and the cover 1, and the lock member 4 is urged toward the opening / closing cover 1 (counterclockwise in the drawing). A pin 6 is attached to a tip of the lock member 4 opposite to the hinge pin 3. The pin 6 of the lock member 4 is slidably inserted along the guide 7 into a guide 7 formed in a substantially U-shaped configuration on the main body.

The guide portion 7 includes a substantially straight first groove 8, an arc-shaped second groove 9, and an arc-shaped third groove 10 that is gentler than the second groove 9. With the end of the first groove 8 as the base end 16, the first groove 8 continues to the second groove 9, the second groove 9 continues to the third groove 10, and the end of the third groove is the terminal 15. As the cover 1 opens and closes, the pin 9 slides back and forth in the guide portion 7. When the pin 6 is located at the tip of the third groove 10, that is, at the end 15 of the guide portion 7, the open / close cover 1 is in a closed state. When the pin 6 is located at the base end 16 of the first groove 8, the open / close cover is open. The first groove 8 and the lock member 4 when the pin 6 is located at the base end 16
(A line connecting the hinge pin 3 and the pin 6) is designed to be 90 ° or more. this is,
When the opening / closing cover 1 in the open position is pressed to close the opening / closing cover 1, the lock member 4 (pin 6) is guided by the guide portion 7 against the urging force of the tension spring 5 as urging means.
In the closed position. Details will be described later. As shown in the figure, the angle θ1 formed by the tangent to the third groove 10 and the lock member 4 (the line connecting the hinge pin 3 and the pin 6) when the pin 6 is located at the end 15 is 90 ° or less. Designed to be. This means that even if a force in the clockwise direction in the figure acts on the closed cover 1, the force of the pin 6 to move to the right in the figure acts so that the lock of the cover 1 does not come off. In order to The third groove 10 is an arc centered on the hinge pin 3. Thereby, it becomes easy to lock.

An interlock sensor 11 is mounted on the main body. The interlock sensor 11 includes a sensor section 12 and an operation lever 14. The sensor section 12 and the operation lever 14 are swingably connected by a hinge pin 13. The operating lever 14 is urged in the reverse direction of the main body 12 by a spring (not shown). FIG.
3 shows details of the operation of the interlock sensor 11. The state in which the operating lever 14 is open is the “OFF” state. When the operating lever 14 is pushed to the position indicated by the two-dot chain line in the clockwise direction in the figure, the state is turned on. Pin 6 is the third groove 1
0, the interlock sensor 1
1 is attached so as to be in an “ON” state.

Next, the opening and closing operation of the opening and closing cover 1 will be described. When closing the opening / closing cover 1 at the open position indicated by the two-dot chain line shown in FIG.
Is guided from the first groove 8 of the guide portion 7 along the second groove 9. When the pin 6 reaches the intersection of the second groove 9 and the third groove 10, the opening / closing cover 1 is at a position slightly beyond the closed position.
Due to the action of the force f of the tension spring 5, the lock member 4 swings counterclockwise in the figure around the hinge pin 3, and the pin 6 is guided in the third groove 10 of the guide portion 7, and the third groove 10
End 15 is reached. Then, the opening / closing cover 1 is in the closed position shown by the solid line in FIG. 1 and is in the locked state.

The pin 6 is guided along the third groove 10,
When heading toward the terminal end 15 of the third groove 10, the pin 6 serving as an operating portion comes into contact with the operating lever 14 of the interlock sensor 11, and with the subsequent movement of the pin 6 in the third groove 10,
The operating lever 14 swings clockwise in the figure around the hinge pin 13, and the interlock sensor 11 is turned on. As shown in FIG. 3, the closing direction of the opening / closing cover 1 is the direction A,
Are substantially at right angles. For this reason, the excessive pressure in the direction A for closing the opening and closing cover 1
No one receives. Therefore, only the force f by the tension spring acts in the B direction, and no unexpected impact is applied. That is, the force B to be turned “ON” by the pin 6 of the interlock sensor 11 is due to the tension spring force f. Therefore, the force A generated by the force for closing the cover does not directly apply to the sensor,
A situation in which the interlock sensor 11 is overpressed does not occur. In addition, the pin 6 has the second groove 9 and the third groove 1.
At the intersection with zero, the opening / closing cover -1 is set to a position slightly beyond the closing position, so that excessive pressing in the direction A is set.

Further, as shown in FIG. 3, the end 15 of the third groove 10 on the closed position side of the guide portion 7 is set so as to be located within the operation range of the operation lever 14 of the interlock sensor 11. ing. Thus, if the tension spring 5 is set to have a strong force, the pin 6 pushes the operating lever 14 strongly, but the pin 6 is stopped at the end 15 to prevent over-pressing. , And does not adversely affect the interlock sensor 11.

Next, when opening the cover 1 at the closed position indicated by the two-dot chain line shown in FIG.
The pin 6 located at the end 15 of the groove 10 moves to the second groove 9 by swinging the lock member 4.
Thereby, the lock of the opening / closing cover 1 is released. As the cover 1 is lifted and opened, the pins 6
Is guided along the second groove 9 and moves. Pin 6 is first
When the position of the intersection of the groove 8 and the second groove 9 is reached, the urging force of the tension spring 5 is acting on the lock member 4.
Slides along the first groove 8 and reaches the base end 16 of the first groove 8. Since the angle θ is set to 90 ° or more as described above, the pin 6 tries to move the first groove 8 in the direction of the second groove 9 due to the weight of the opening / closing cover 1 and the lock member 4. Thus, the force of the tension spring 5 is set. Therefore, the opening / closing cover 1 is stabilized in the open state.

Then, in order to close the cover 1 again, a pressing force is applied to the cover 1, and the cover 1 and the lock member 4 swing about the hinge pin 2 in the counterclockwise direction in FIG. As described above, one end is connected to the cover by the hinge pin 3, while the other end is connected to the pin 6.
In the first groove 8 is in a free state, and the angle θ is designed to be 90 ° or more. for that reason,
When the force by which the pin 6 is stopped at the base end 16 of the first groove 8 by the force of the above-described tension spring 5 exceeds the force due to the pressing on the opening / closing cover 1, the pin 6 is moved to the base end 16 of the first groove 8. It moves in the direction of the intersection of the first groove 8 and the second groove 9 from the side. Pin 6
Is guided from the first groove 8 to the second groove 9. The pin 6 guided by the second groove 9 reaches the intersection of the third groove 10 and the second groove 9, moves along the groove 10, and the pin 6 is located at the terminal end 15 of the third groove 10, and Thus, the cover 1 is again locked in the closed position. Thus, the open / close cover 1 in the open position
Is pressed to close the opening / closing cover 1 so that the lock member 4 (pin 6) moves the guide portion 7 toward the closed position against the urging force of the tension spring 5 which is the urging means. .

In the above embodiment, the lock member is provided on the opening / closing cover side, and the interlock sensor and the groove for guiding the pin of the lock member are provided on the main body side. The present invention can be similarly applied to a case where a lock member is provided and a groove for guiding an interlock sensor and a pin of the lock member is provided on the opening / closing cover side.

[0018]

As described above, according to the present invention, as in the case of using the resin elasticity of the hook, wear or fatigue occurs due to repetitive operation, the stopper does not work, and the cover may not function due to the variation in precision of parts. The problem that the function of the opening / closing mechanism varies can be prevented. Thereby, the pin of the lock member is directed to the closed position along the guide portion only by the operation of pressing the open / close cover at the open position against the urging force of the urging means, which is excellent in the repetitive operation. The opening / closing cover at the opening position can be a stopper mechanism of the opening / closing cover that can be closed in one action.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an opening / closing cover mechanism of the present invention (closed position).

FIG. 2 is a side view showing an embodiment of the opening / closing cover mechanism of the present invention (open position).

FIG. 3 is a side view showing details of the operation of the interlock sensor shown in FIGS. 1 and 2;

FIG. 4 is a side view showing a conventional opening / closing cover mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening / closing cover 4 Lock member 5 Tension spring (biasing means) 6 Pin 7 Guide part 8 1st groove (guide part) θ angle

Claims (3)

[Claims] An opening / closing cover, a lock member swingably attached to the opening / closing cover, a guide portion provided on the body to be opened / closed, for guiding the locking member between open / close positions of the opening / closing cover, and the lock. Biasing means for biasing the member to maintain the open and closed positions, wherein when the open / close cover is pressed from the open position and closed, the lock member opposes the biasing force of the biasing means. An opening / closing cover mechanism, wherein the guide portion is configured to face a closed position. 2. The opening / closing cover mechanism according to claim 1, wherein the angle between the lock member in the open position and the guide portion is 90 ° or more. 3. The opening / closing cover mechanism according to claim 1, wherein the biasing means is a tension spring stretched between the lock member and the opening / closing cover.