JP2793577B2 - Locking device for printer cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer cover locking device for fixing a printer cover that needs to be opened and closed when the printer cover is closed.

[0002]

2. Description of the Related Art FIG. 7 is a front view showing an example of a conventional lock device for a printer cover, FIG. 8 is a front view showing a state in which a lock lever of the example of FIG. 7 is released, and FIG. FIG. 10 is a front view showing a state in which the lock lever is retracted, and FIG. 10 is a side view showing a locked state of the printer cover in the example of FIG.

A conventional printer cover locking device for fixing the printer cover when the printer cover which needs to be opened and closed is disclosed in, for example, Japanese Utility Model Application No. 61-140.
No. 561 (JP-A-63-47161).

That is, in FIGS. 7 to 10, reference numeral 12 denotes a locking spring, 13 denotes a link, 14 denotes a lock lever,
4a is an upper end of the lock lever, 14b is a lower end of the lock lever, 15 is an opening / closing member, 15a is a knob, 16 is a stopper for the lock lever 14, and 17 is an opening / closing member 15
A fixed rotation fulcrum to which is attached, 18 is the lock lever 1
4 is a movable rotary fulcrum combined with a torsion spring 19 to which is attached, 19 is a torsion spring, 20 and 21 are fulcrums, 22 is a stopper, 30 is a base plate of the device, 3
1 is a hook.

[0005] As shown in FIGS.
5 is rotatable around a fixed rotation fulcrum 17,
The lock lever 14 is attached so as to be rotatable around a movable rotation fulcrum 18 provided on the opening / closing member 15. When the opening / closing member 15 is moved obliquely upward (in the direction of arrow I) by the knob 15a, the lock lever 14 moves upward relative to the fixed rotation fulcrum 17 and detaches upward from the hook 31. When the opening / closing member 15 moves further upward,
The lower end 14b of the lock lever 14 contacts the stopper 16, and the lock lever 14 rotates around the movable rotation fulcrum 18, moves in the lateral direction of the hook 31, and separates.
The movement of the opening / closing member 15 is restricted by the stopper 22. Since the two opening and closing members 15 on the left and right are connected by the link 13, they perform the same operation at the same time.

[0006]

The conventional printer cover locking device as described above has a structure in which the printer cover is automatically opened by a spring, so that the user can use only one hand without holding down the printer cover. When the operation of releasing the lock device is performed, the printer cover may open and jump up without permission, and there is a problem that operability is poor. Also, when closing and locking the printer cover, it is necessary to perform the operation of closing the printer cover and the operation of locking the printer cover independently of each other. At this time, since the cover is opened halfway, there is a problem that reliability is lacking.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems of the conventional printer cover locking device, improve the operability when opening and closing the printer cover, and furthermore, to close the printer cover when the printer cover is closed. It is an object of the present invention to provide a highly reliable locking device for a printer cover because it can be securely locked.When opening the printer cover, it can be operated with one hand and one action. The printer cover opens safely,
In addition, when the lock is released, the printer cover is securely opened, and when the printer cover is closed, the printer cover can be operated with one hand, and the printer cover can be securely locked. It was made.

[0008]

According to the present invention, there is provided a lock device for a printer cover, wherein a lock plate which is rotated by an external force is provided on a cover side, and a lock pin which engages with the lock plate is provided on a base side. When the lock plate is closed, the lock plate and the lock pin are engaged so that the cover can be locked, an unlock pin is provided on the lock plate, and the lock is performed while contacting the unlock pin on the base side. The unlock plate that follows the unlocking movement of the plate is provided, and when the unlocking operation of the cover is performed, the unlock plate and the unlock pin are engaged so that the lock plate re-engages with the lock pin. To prevent engagement and depress the open cover With locking said cover to engage with said locking pin and said locking plate I,
The unlock plate is used to return the unlock plate, and as a means for rotating the lock plate, a lock release button for pressing a top of the lock plate is provided, or The top is projected from the cover.

That is, a lock device for a printer cover according to the present invention comprises a lock plate which rotates about a shaft provided on the cover and has a claw portion at a lower end, an unlock pin fixed to the lock plate, and a base. And a lock pin that locks the cover by engaging with the claw portion of the lock plate when the cover is closed, and the claw portion that rotates about the lock pin and rotates the lock plate. An unlock plate having a notch at its tip for engaging with the unlock pin when the engagement with the lock plate is released and preventing the claw portion of the lock plate from re-engaging with the lock plate. And a torsion spring for urging the unlock plate against the unlock pin,
An unlocking stopper provided on the base for preventing movement of the unlocking plate when the cover is opened, and a spring for urging the locking plate toward the locking pin, further comprising: A lock release button for rotating the lock plate is provided on the cover, or a top of the lock plate is extended and protrudes out of the cover.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side view showing a first embodiment of the present invention, FIG. 2 is a side view showing a state where the lock release button is being pressed in the embodiment of FIG. 1, and FIG. FIG. 4 is a side view showing a state in which the lock release button is pressed down in the embodiment, FIG. 4 is a side view showing a state in which the printer cover is opened in the embodiment of FIG. 1, and FIG. 5 is a view of closing the printer cover in the embodiment of FIG. It is a side view which shows the state at the time.

As shown in FIG. 1, a printer cover (cover) 1 is closed in a normal state. A lock release button (release button) 2 is provided on the top of the cover 1, and when the release button 2 is pressed, the cover 1 is opened in the direction of arrow A. When closing the cover 1, the cover 1 is closed by pushing the cover 1 itself and pushing down the cover 1 in a direction opposite to the direction of arrow A.

The projection 2a projecting downward from the lower surface of the release button 2 is in contact with the projection 3a projecting upward from the upper end of the lock plate 3. The lock plate 3 is provided on the cover 1. The lock plate 3 is rotatably held by a lock plate shaft 5, and a spring 4 is mounted on the lock plate 3. Therefore, when the release button 2 is depressed, the lock plate 3 can be rotated against the force of the spring 4 via the protrusion 3a. A claw portion 3b is formed at a lower portion of the lock plate 3 by cutting a part of a side edge.
Are engaged with a lock pin 10 provided on an unlock stopper 9 of the base 8. The closed state of the cover 1 is locked and held by the engagement between the claw 3b of the lock plate 3 and the lock pin 10 of the unlock stopper 9.

The unlocking stopper 9 has a lock pin 1
An unlock plate 7 is provided rotatably around 0. The unlock plate 7 is provided with a torsion spring 11 for applying a clockwise (arrow B) rotational force to the unlock plate 7. Therefore, the unlock plate 7 is provided on the lock plate 3. It comes into contact with an unlock pin 6 and stops.

Next, the operation of the printer cover locking device constructed as described above will be described with reference to FIGS.

As shown in FIG. 2, when the release button 2 is pressed by the finger 40a in the state where the cover 1 is closed, the projection 2a pushes the projection 3a of the lock plate 3, so that the lock plate 3 is Is rotated clockwise (in the direction of arrow C). At this time, the unlock plate 7 also follows the movement of the lock plate 3,
The lock pin 10 is driven by the force of the torsion spring 11.
Rotate in the same direction with the fulcrum as a fulcrum. FIG. 3 shows a state in which the release button 2 is pressed down until the upper surface of the release button 2 substantially coincides with the upper surface of the cover 1.

The engagement between the claw 3b and the lock pin 10 is released by the rotation of the lock plate 3, so that the lock of the cover 1 is released. At this time, when the finger 40a is released from the release button 2, the lock plate 3 is rotated counterclockwise (the direction opposite to the arrow C) by the spring 4, but as shown in FIG. 6 is a notch 7a at the tip of the unlock plate 7
Therefore, the movement is prevented, and the claw 3b of the lock plate 3 does not engage the lock pin 10 of the unlock stopper 9 again to lock the cover 1.

When the finger 40a is released from the release button 2 in this state, as shown in FIG. 4, the cover 1 is opened by the force of a cover spring (not shown). When cover 1 opens,
Since the lock plate 3 is lifted and the unlock pin 6 is separated from the unlock plate 7, the lock plate 3
Returns to the original state by the force of the spring 4, and the release button 2 also returns. At this time, the tip of the unlock plate 7 comes into contact with the unlock stopper 9 and stops.

When the open cover 1 is closed,
As shown in (1), the cover 1 itself is pressed to push down the cover 1 in the direction of arrow D opposite to the direction of arrow A. As a result, the lock plate 3 descends together with the cover 1 and the slope of the lower claw portion 3b comes into contact with the lock pin 10, and when the lock plate 3 further descends, the claw portion 3b engages with the lock pin 10 to move the cover 1 down. Lock. At the same time,
The unlock pin 6 fixed to the lock plate 3 comes into contact with the upper surface of the unlock plate 7 to rotate the unlock plate 7 in a counterclockwise direction (the direction of arrow E) and return to the state of FIG.

FIG. 6 is a side view showing a second embodiment of the present invention.

In the present embodiment, as shown in FIG. 6, the release button is deleted, and instead, the protruding portion 43a at the upper end of the lock plate 43 is bent one more step so as to protrude from the cover 41. A holding portion 41a formed by cutting and bending is provided at a position facing the protruding portion 43a. Other configurations are the same as those of the embodiment of FIG.

In the printer cover locking device thus configured, the holding portion 41a holds the finger 40b,
The lock plate 43 can be rotated by pressing the protrusion 43a in the direction of arrow F by touching the finger 40c to 3a. The subsequent operation and action are the same as those of the embodiment of FIG.

[0023]

As described above, the lock device for a printer cover according to the present invention is provided with a lock plate rotated on the cover side by an external force, and a lock pin engaging with the lock plate on the base side. When the cover is closed, the cover is locked by engaging the lock plate and the lock pin, and the lock plate is provided with an unlock pin. Providing an unlock plate that follows the unlocking movement, preventing the lock plate from re-engaging with the lock pin by engaging the unlock plate and the unlock pin when the cover is unlocked, By pressing down the open cover itself, the lock plate and lock pin By locking the cover together and returning the unlock plate with the unlock pin, the printer cover can be operated with one hand and one action when opening and closing the printer cover, improving operability. In addition, since the printer cover can be safely opened when the printer cover is opened and the printer cover can be securely locked when the printer cover is closed, there is an effect that a locking device for the printer cover with excellent reliability can be obtained. .

[Brief description of the drawings]

FIG. 1 is a side view showing a first embodiment of the present invention.

FIG. 2 is a side view showing a state where the lock release button is being pressed in the embodiment of FIG. 1;

FIG. 3 is a side view showing a state where the lock release button has been pressed down in the embodiment of FIG. 1;

FIG. 4 is a side view showing a state where a printer cover is opened in the embodiment of FIG. 1;

FIG. 5 is a side view showing a state when the printer cover is closed in the embodiment of FIG. 1;

FIG. 6 is a side view showing a second embodiment of the present invention.

FIG. 7 is a front view showing an example of a conventional printer cover locking device.

8 is a front view showing a state when the lock lever of the example of FIG. 7 is released.

9 is a front view showing a state in which the lock lever in the example of FIG. 7 is retracted.

FIG. 10 is a side view showing a locked state of the printer cover of the example of FIG. 7;

[Explanation of symbols]

 1.41 Printer cover (cover) 2 Lock release button (release button) 2a Projection section 3 · 43 Lock plate 3a · 43a Projection section 3b Claw section 4 Spring 5 Lock plate shaft 6 Unlock pin 7 Unlock plate 7a Notch section Reference Signs List 8 base 9 unlock stopper 10 lock pin 11 torsion spring 12 spring 13 link 14 lock lever 14a upper end 14b lower end 15 opening / closing member 15a knob 16 stopper 17 fixed rotation fulcrum 18 movable rotation fulcrum 19 torsion spring 20/21 fulcrum 22 stopper 30 base plate 31 hook 40a / 40b / 40c finger 41a holding unit

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B41J 29/54 B41J 29/13

Claims (7)

(57) [Claims] 1. A lock plate which is turned by an external force is provided on a cover side, a lock pin which engages with the lock plate is provided on a base side, and the lock plate and the lock pin are engaged when the cover is closed. The cover can be locked together with the lock plate, and an unlock pin is provided on the lock plate, and the unlock plate that follows the unlocking movement of the lock plate while contacting the unlock pin is provided on the base side. When the cover unlocking operation is performed, the unlock plate is engaged with the unlock pin to prevent the lock plate from re-engaging with the lock pin, and the cover is opened. By pressing down, the lock plate and the lock pin are engaged. A lock device for a printer cover, wherein the cover is locked and the unlock plate is returned by the unlock pin. 2. The printer cover locking device according to claim 1, wherein a lock release button for pressing a top portion of the lock plate is provided as means for rotating the lock plate. 3. The printer cover locking device according to claim 1, wherein a top of the lock plate is projected from the cover as a means for rotating the lock plate. 4. A locking device for a printer cover according to claim 3, wherein a holding portion is provided at a position of said cover facing a top portion of said lock plate. 5. A lock plate which rotates about a shaft provided on a cover and has a claw portion at a lower end portion, an unlock pin fixed to the lock plate, and a lock plate provided on a base when the cover is closed. A lock pin that locks the cover by engaging the claw portion of the lock plate; and a lock pin that rotates about the lock pin to rotate the lock plate to release the engagement between the claw portion and the lock plate. An unlock plate having a notch at the tip for engaging the unlock pin and preventing the claw portion of the lock plate from re-engaging with the lock plate; and unlocking the unlock plate. A torsion spring biasing against a pin, and the unlock play provided when the cover provided on the base is opened. An unlock stopper that prevents the movement of the lock plate, a spring that urges the lock plate toward the lock pin, and a lock release button that is provided on the cover and rotates the lock plate when pressed. A locking device for a printer cover. 6. A lock plate which pivots on a shaft provided on a cover and has a claw portion at a lower end portion, an unlock pin fixed to the lock plate, and a lock plate provided on a base when the cover is closed. A lock pin that locks the cover by engaging the claw portion of the lock plate; and a lock pin that rotates about the lock pin to rotate the lock plate to release the engagement between the claw portion and the lock plate. An unlock plate having a notch at the tip for engaging the unlock pin and preventing the claw portion of the lock plate from re-engaging with the lock plate; and unlocking the unlock plate. A torsion spring biasing against a pin, and the unlock play provided when the cover provided on the base is opened. A lock stopper for preventing the movement of the lock plate, and a spring for urging the lock plate toward the lock pin, wherein a top portion of the lock plate is extended and protrudes out of the cover. Printer cover locking device. 7. A locking device for a printer cover according to claim 6, wherein a holding portion is provided at a position of said cover facing a top portion of said lock plate.