JP2578160Y2 - Open / close lock mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing lock mechanism for preventing backlash when an operation panel detachably mounted on an apparatus body is mounted.

[0002]

2. Description of the Related Art As a means of preventing theft associated with the upgrading of audio equipment such as car stereos, a detachable operation panel has been commercialized. This means that by removing the operation panel from the device body when leaving the vehicle, it is impossible to recognize the presence of audio equipment, and it is impossible to use the equipment without the operation panel even if it is removed. It is intended to be implied.

FIG. 1 shows a lock mechanism of an operation panel which is detachably attached to an apparatus main body via a flap. The operation mechanism has a plurality of operation buttons 3 via a shaft 2a of the apparatus main body 2. The panel 4 is rotatably mounted. The lock mechanism 1 provided on the device main body 2 side is provided with a plunger 6 having a movable shaft 5 that moves in the directions of arrows a and b. A hook arm 9 having an engaging portion 7 is engaged with an end of the movable shaft 5. The movement of the movable shaft 5 in the directions of arrows a and b causes the hook arm 9 to rotate about the shaft 8 as a fulcrum. I do. On the rear side of the operation panel 4, the engaging portion 7 of the hook arm 9 when the operation panel 4 is closed.
Is provided with an engaging pin 10 to be engaged. The operation panel 4 is urged to the open side by a spring 12.

Here, when closing the operation panel 4 by operating a close button (not shown), an opening / closing mechanism (not shown) rotates the operation panel 4 in the direction of arrow d about the shaft 2a as a fulcrum. When the operation panel 4 rotates to the final position,
The plunger 6 pushes the movable shaft 5 in the direction of arrow a. As a result, the engaging portion 7 of the hook arm 9 engages with the engaging pin 10 and locks the operation panel 4 to the device main body 2 side. On the other hand, when rotating the operation panel 4 to the open side, when an open button (not shown) of the operation panel 4 is operated, the plunger 6 is turned on.
Pulls the movable shaft 5 in the direction of the arrow b. As a result, the hook arm 9 rotates with the shaft 8 as a fulcrum, and the lock of the engaging pin 10 is released, so that the operation panel 4 rotates in the opening direction with the biasing force of the spring 12 about the shaft 2a as the fulcrum.

[0005]

As described above, in the above-described conventional lock mechanism, when the operation panel 4 is closed against the urging force of the spring 12, the engaging portion 7 of the hook arm 9 is engaged with the engaging pin. 10, the operation panel 4 is locked to the device main body 2 by preventing the operation panel 4 from rotating in the opening direction. However, in such a lock mechanism, the engaging portion 7 of the hook arm 9 is engaged with the engaging pin 10 by the turning force of the operation panel 4 which is simply rotated in the opening direction by the urging force of the spring 12. Is blocked by. For this reason, when each operation button 3 of the operation panel 4 is operated, when the operation panel 4 is pressed into the device main body 2 by the pressing force of each operation button 3, the operation panel 4 is loose. There was a defect.

The present invention has been made in view of such circumstances, and has as its object to provide a lock mechanism for an operation panel that can prevent rattling during operation of the operation panel.

[0007]

According to the present invention, there is provided a lock mechanism for opening and closing a flap for removably mounting an operation panel, wherein the flap is mounted on an apparatus body to achieve the above object. A fan-shaped gear that is rotated by the driving force of the drive motor, an opening / closing arm connected to the fan-shaped gear to apply an opening / closing force to the flap, and an engagement pin at one end; An interlocking arm rotatably mounted on the flap side, an intermediate portion rotatably mounted on the device body side, and a biasing force of a spring which is constantly urged in one direction, and the engaging pin is opened and closed when the flap is opened and closed. And a lock arm having a lock cam portion that engages the engaging pin when the flap is closed, wherein the engaging pin is opened and closed when the flap is opened and closed. By contacting the opening and closing contact cam portion, the lock arm is pushed back against the urging force of the spring, and when the flap is closed, the engagement pin is locked by the lock cam portion. And

[0008]

In the opening / closing lock mechanism of the present invention, for example, when closing the flap, when the fan gear is rotated by the driving force of the drive motor, the opening / closing arm connected to the fan gear applies a closing force to the flap. . At this time, when the interlocking arm rotates in conjunction with the closing operation of the flap, the engagement pin provided at one end thereof comes into contact with the opening and closing contact cam portion, and the lock arm opposes the urging force of the spring. Push back. When the flap rotates to the closed position, the engagement pin shifts from the opening and closing contact cam portion to the lock cam portion side. In this state, since the pushing force against the urging force of the spring to the lock arm by the engaging pin does not act, the lock arm is rotated by the urging force of the spring, so that the lock cam portion engages the engaging pin. Lock. Therefore, when the flap is closed, the interlocking arm that is interlocked with the rotation of the flap is locked via the engagement pin, so that when operating the operation panel attached to the flap, a pushing force is applied to the operation panel. However, the movement of the flap is prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below in detail with reference to the drawings. 2 and 3 show one embodiment of the open / close lock mechanism of the present invention. As shown in these figures, a drive motor 21 is attached to a side wall of the device main body 20. The worm gear 22 of the drive motor 21 includes:
Large gear 24 rotatably mounted about shaft 23
Are engaged. A lock gear 26 meshes with a small gear 25 mounted coaxially with the shaft 23. A large gear 28 rotatably mounted on a shaft 27 is engaged with the lock gear 26. Here, the lock gear 26 is a rotatable lock arm 3 described later.
8 and shifts with the rotation of the lock arm 38.

A small gear 29 mounted coaxially with the shaft 27 meshes with a sector gear 31 rotatably mounted on the shaft 30 as a fulcrum. One end 31a of an open / close arm 31A rotatably attached to the shaft 30 is fixed to the sector gear 31 side. The other end 31b of the opening / closing arm 31A is rotatably attached to a lower end of a flap 32 for detachably attaching the operation panel 50. Near the other end 31b of the opening / closing arm 31A of the flap 32, one end 35 of an interlocking arm 34 that is attached rotatably about a shaft 33 is attached rotatably. An engagement pin 36 provided at the other end of the interlocking arm 34 is fitted into a guide groove 37 provided on a side wall of the device main body 20.

The engaging pin 36 is provided on a cam surface 39 of a lock arm 38 which is rotatably mounted on the shaft 27 as a fulcrum.
Is in contact with The locking piece 40 of the lock arm 38 includes
One end of the spring 41 is locked. The lock arm 38 is constantly urged clockwise by the urging force of the spring 41. On a cam surface 39 of the lock arm 38, a lock cam portion 39a and an opening / closing contact cam portion 39b are provided.

Next, the operation of the lock mechanism of the operation panel having such a configuration will be described. First, when the operation panel 50 in the state of FIG. 3 is closed, when a close button (not shown) is operated, the drive motor 21 is driven in a predetermined direction. When the large gear 24 rotates counterclockwise by the drive of the drive motor 21, the torque of the large gear 24 is transmitted to the large gear 28 via the small gear 25 and the lock gear 26. When the large gear 28 rotates counterclockwise, the sector gear 31 meshing with the small gear 29 rotates clockwise about the shaft 30. Due to the clockwise rotation of the sector gear 31, the other end of the opening / closing arm 31 </ b> A whose one end is attached to the sector gear 31 rotates.

By the rotation of the opening / closing arm 31A, the flap 32 is gradually raised while being supported by the one end 35 of the interlocking arm 34, and is accommodated in the flap accommodating portion 51. At this time, the opening / closing arm 31 which is the pivot of the flap 32
Since the other end 31b of A is lowered by the rotation of the opening / closing arm 31A, the flap 32 is rotated to the closing side with the lower end of the flap 32 gradually lowered. At this time, along with the downward movement of the lower end portion of the flap 32 by rotation of the flap 32, since the end portion 35 of the interlocking arm 34 attached to an end portion of the flap 32 is depressed, link arm 34 the shaft 33 , The other end of the interlocking arm 34 rotates.

The rotation of the other end of the interlocking arm 34 causes the engaging pin 36 to move upward in the guide groove 37 provided on the side wall of the apparatus main body 20. When the engagement pin 36 is moved upward, the engagement pin 36 slides in a state where the engagement pin 36 is in contact with the opening / closing contact cam portion 39b of the lock arm 38. At this time, the lock arm 38 is pressed against the urging force of the spring 41 by the engagement pin 36 abutting on the open / close contact cam portion 39b of the lock arm 38.

When the flap 32 is rotated to just before the closing position, the engagement pin 36 is disengaged from the opening / closing contact cam portion 39b by the rotation of the interlocking arm 34. At this time, when the engaging pin 36 is disengaged from the opening / closing contact cam portion 39b, the pressing force against the urging force of the spring 41 against the lock arm 38 is lost, so that the lock arm 38 is rotated by the urging force of the spring 41. 2
7 rotates clockwise around the fulcrum. Lock arm 38
With the rotation of, the lock cam portion 39a pushes up the engagement pin. At this time, the pushing force of the engagement pin 36 causes
The flap 32 is retracted to the closed position. Flap 32
Is rotated to the closed position, the back surface of the flap 32 contacts the inner surface of the flap storage portion 51, and the engagement pin 36 is pushed up by the lock cam portion 39a.

Further, in this state, the lock gear 26 shifts to the right while meshing with the large gear 28 with the rotation of the lock arm 38, and the lock arm 26 38 is the spring 4
1 is pressed in the same direction as the urging direction. This allows
The lock cam 39a of the lock arm 38 is
Block the transition. At this time, the lock arm 38
The urging force of the spring 41 and the pressing force due to the meshing force between the lock gear 26 and the large gear 28 act, and the lock cam portion 39a of the lock arm 38 more securely prevents the lock pin 39 from displacing the engagement pin 36. Since the rotation of the interlocking arm 34 is prevented, the backlash of the operation panel 50 attached to the flap 32 is prevented.

On the other hand, when the operation panel 50 is rotated to the open side, when the open / close button (not shown) of the operation panel 50 is operated, the large gear 24 is rotated clockwise by the driving of the drive motor 21 and the large gear 24 is rotated. The torque of the gear 24 is transmitted to the large gear 28 via the small gear 25 and the lock gear 26.

At this time, as the lock gear 26 rotates counterclockwise due to the engagement with the large gear 28, the lock arm 38 to which the lock gear 26 is attached rotates counterclockwise against the urging force of the spring 41. I do. Lock arm 3
8, the boundary between the lock cam portion 39a and the opening / closing contact cam portion 39b is moved to the engagement pin 3 of the interlocking arm 34.
At about the same time when the vehicle reaches the position 6, the sector gear 31 meshing with the small gear 29 starts to rotate counterclockwise about the shaft 30. Due to the rotation of the sector gear 31 in the counterclockwise direction, the other end of the opening / closing arm 31A, one end of which is attached to the sector gear 31, rotates in the counterclockwise direction. As a result, the flap 32 is gradually pushed out of the flap accommodating portion 51 while being supported by the one end 35 of the interlocking arm 34, and is tilted horizontally.

At this time, the interlocking arm 3 attached to the end of the flap 32 with the rotation of the flap 32
By the fourth end portion 35 is pushed up, the interlocking earth <br/> arm 34 is rotated counterclockwise around the shaft 33, the engagement pin 36 of the other end of the interlocking <br/> arm 34 The inside of the guide groove 37 provided on the side wall of the device main body 20 is shifted downward.
When the engagement pin 36 is moved downward, the engagement pin 36 is in contact with the opening / closing contact cam portion 39b. It is prevented by the contact of the engaging pin 36 with the cam portion 39b.

As described above, in this embodiment, when the fan gear 31 is rotated by the driving force of the drive motor 21 to close the flap 32, for example, the opening / closing arm 31A connected to the fan gear 31 causes the flap 32 To the closing force. At this time, when the interlocking arm 34 rotates in conjunction with the closing operation of the flap 32, the engagement pin 36 provided at one end thereof abuts on the opening / closing abutment cam portion 39 b, and the lock arm 38 is moved by the spring 41. Push back against the bias. When the flap 32 rotates to the closed position, the engaging pin 36 is shifted from the opening / closing contact cam portion 39b to the lock cam portion 39a. In this state, no push-back force acts on the lock arm 38 against the urging force of the spring 41 by the engagement pin 36, so that the lock arm 38 is rotated by the urging force of the spring 41, so that the lock cam portion is rotated. 39a locks the engagement pin 36.

Therefore, when the flap 32 is closed, the interlocking arm 34 that is interlocked with the rotation of the flap 32 is locked via the engaging pin 36, and when the operation panel 50 attached to the flap 32 is operated, the operation panel 50 is locked. On the other hand, even if a pushing force is applied, the movement of the flap 32 is prevented, so that the operation panel 50 is prevented from rattling.

[0022]

As described above, according to the opening / closing lock mechanism of the present invention, for example, when the flap is closed,
An interlocking arm interlocking with the pivoting operation is locked via an engagement pin, and when operating the operation panel attached to the flap, the movement of the flap is prevented even if a pushing force is applied to the operation panel. The play of the operation panel can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram showing a conventional operation panel lock mechanism.

FIG. 2 is a view showing an embodiment of the open / close lock mechanism of the present invention.

FIG. 3 is a view showing a state in which a lock of an opening / closing lock mechanism in FIG. 2 is released.

FIG. 4 is a view showing a locked state of the opening / closing lock mechanism of FIG. 2;

FIG. 5 is a diagram showing an unlocked state of the opening / closing lock mechanism of FIG. 2;

[Explanation of symbols]

Reference Signs List 20 device main body 21 drive motor 26 lock gear 31 sector gear 31A opening / closing arm 32 flap 34 interlocking arm 36 engagement pin 38 lock arm 39 cam surface 39a lock cam portion 39b opening / closing contact cam portion 41 spring 50 operation panel

Claims (1)

(57) [Scope of request for utility model registration] 1. A flap opening / closing lock mechanism which is attached to an apparatus main body so as to be openable and closable, and to which an operation panel is detachably attached, wherein the fan gear rotates by a driving force of a drive motor; An opening / closing arm for applying an opening / closing force to the flap; an engagement pin at one end; an other end rotatably attached to the flap side; An interlocking arm rotatably attached to the open / close contact cam portion which is always urged in one direction by an urging force of a spring, and which comes into contact with the engaging pin when the flap is opened and closed, and A lock arm having a lock cam portion that engages with an engagement pin. When the flap is opened and closed, the engagement pin abuts on the opening and closing contact cam portion, so that Pushed back against the Kuamu the biasing force of the spring, in the closing of the flap, opening and closing the locking mechanism, characterized in that the engaging pin is locked by the lock cam portion.