JPH056492Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a recorder, and more particularly to a door opening and closing mechanism for a recorder having a door.

PRIOR ART

A conventional mechanism of this type had the configuration shown in FIG.

FIG. 3 is a side view showing the door portion of the recorder. In the figure, 1 is a door mechanism having a door 11 and a rotation center axis 12 which is the center of rotation of the door 11, 2 is a main body mechanism including a bottom plate 21 and a locking mechanism 22 for the door 11, and 3 is a spring 31 and both ends of this spring 31. This is a spring mechanism consisting of a spring support A32 and a spring support B33 for supporting.

The door mechanism 11 is rotatably held on both side plates (not shown) of the main body mechanism 2 via a rotation center shaft 12. Also, the door 11 that constitutes the door mechanism 1
A hook-shaped groove is formed on the top of the door 11 to engage with a door lock mechanism 22 provided on the main body mechanism 2.
to lock.

The spring 31 of the spring mechanism 3 is wound around the rotation center shaft 12, and one end thereof is engaged with a spring support A32 provided on the door mechanism 1 side, and the other end is engaged with a spring support B33 provided on the main body mechanism 2 side. to lock.

Note that 4 is recording paper.

Next, the operation of the conventional device having such a configuration will be explained.

In the state shown in FIG. 3A, when looking at the moment about the rotation center axis 12, a rightward moment due to the center of gravity G of the door mechanism 11 and the recording paper 4 and a leftward moment due to the spring 31 are acting.
In such a device, it was necessary to increase the counterclockwise moment by the spring 31 so that the door 11 would open when the door lock mechanism 22 was pushed down to release the door lock.

[Problem that the invention attempts to solve]

Therefore, as shown in Figure 3b, door 1
Near the rotation stop position 1, the moment of the center of gravity G and the moment of the spring 31 are in the same direction, and the impact force of this rotational force on the stopper becomes considerably large.

The present invention aims to improve this point.

[Means for solving problems]

Therefore, in the present invention, when the door lock mechanism 22 is released and the door mechanism 1 is opened, the center of gravity G
A spring mechanism 3 is provided which reverses the direction of the moment almost at the same time as the direction of the moment is reversed. That is, the moment due to the center of gravity G and the moment due to the spring mechanism 3 are always applied in opposite directions.

[Effect]

When the door mechanism 1 is locked in the door lock mechanism 22 and in a normal state, the moment due to the center of gravity G and the spring 31 are generated with respect to the rotation center axis 12 of the door mechanism 1.
The moment of the spring 31 acts in opposite directions to each other, and the moment of the spring 31 acting in the direction of opening the door 1 is adjusted to be larger. When the door lock mechanism 22 is released and the door 11 begins to rotate for release, and the moment of the center of gravity G is almost reversed in the opposite direction, the spring support position of the spring 31 is changed and the direction of the moment of the spring 31 is reversed. In the subsequent operation, the rotational speed of the door 11 is reduced by the action of the moment of the center of gravity G applied to the door 11 and the moment due to the spring 31.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 is a diagram explaining the operation of the embodiment of the present invention;
FIG. 2 is an explanatory diagram showing the spring mechanism 3. In the figure, the same parts as in the apparatus of FIG. 3 are given the same reference numerals. 23 is the main body side plate, 231 is the notch,
34 is a spring support C, and 35 is a spring support D.

First, the operation of the embodiment of the present invention will be explained with reference to FIG.

FIG. 1a shows a state in which the door mechanism 1 is closed to the main body mechanism 2. In this state, both ends of the spring 31 of the spring mechanism 3 are locked to the spring support A32 provided on the door mechanism 1 side and the spring support B33 provided on the main body mechanism 2 side, as shown in FIG. The situation is similar to that of . Therefore, the moment due to the center of gravity G and the moment due to the spring 31 with respect to the rotation center axis 12 are in opposite directions, and the moment of the spring 31 is adjusted to be larger.

FIG. 1b shows a state in which the door has been rotated by a predetermined angle after the door lock mechanism 22 has been released. In this state, the center of gravity G of the door mechanism 1 (including the recording paper 4) is located almost directly above the rotation center axis 12, and the support positions of both ends of the spring 31 are from spring support A32 to spring support D35, and spring support It is at the point where B33 is changed to spring support C34.

Therefore, in this state, there is almost no moment acting on the rotation center axis, and the door 11 rotates due to inertia.

FIG. 1c is a diagram showing a state in which the door 11 has further rotated and reached near the rotation stop position. 1st
After the state shown in FIG. b is passed, the moment by the spring 31 acts in a direction that prevents the rotation of the door 11, reducing the rotational speed of the door 11 and softening the impact at the stop position.

Next, the spring mechanism, which is an important element of the present invention, will be explained in detail with reference to FIG. In Figure 2 a
2 shows a side view of the spring mechanism 3, and FIG. 2b is a front view seen from the direction of arrow F in FIG. 2a.

The spring 31 of the spring mechanism 3 is wound around the rotation center shaft 12, and one end thereof is extended downward to form a spring support B33.
is locked. The other end of the spring 31 is stretched horizontally by a predetermined distance, and then bent outward at a substantially right angle, and near the bent part, the spring support A32
The part that is engaged and bent outward is the main body side plate 2
It engages with a notch 231 provided in 3.

The spring support members include two spring supports (spring support A32, spring support C34) integrated with the door mechanism 1 and two spring supports (spring support B3) integrated with the main body mechanism 2.
3, spring support D35).

In the normal state (the door 1 is in the closed state), the spring 31 is locked to the spring support A32 and the spring support B33, and after the door mechanism 1 has rotated by a predetermined angle, the spring support C34 provided at the bottom of the front surface 13 of the door is locked.
and a spring support D35 formed by a notch 231 in the main body side plate 23.

The spring supports A32, B33, and C34 are each formed of a member having a concave portion with an open tip in the center, so that the spring 31 can be surely engaged and locked.

[Effects of the Invention] As explained above, the present invention has the advantage that the structure is simple and the door can be opened and closed smoothly.

[Brief explanation of the drawing]

1 and 2 are configuration explanatory diagrams showing one embodiment of the present invention, and FIG. 3 is an explanatory diagram of a conventional device. 1... Door mechanism, 2... Main body mechanism, 3... Spring mechanism, 4... Recording paper.

Claims (1)

[Scope of Claim for Utility Model Registration] A main body mechanism, a door mechanism rotatably held in the main body mechanism via a central axis of rotation, and a gravitational moment structure and a spring mechanism that apply rotational force to the door mechanism. , the door mechanism is wound around the rotation center shaft,
and has a spring 31 with one end extending laterally and the other end extending downward; one end of the spring 31 extending laterally is formed on the spring support A32 formed on the door mechanism or on the main body mechanism. The other end of the spring 31 that extends downward is capable of engaging with the spring support D35 that is
It has a configuration capable of engaging with a spring support B33 formed on the main body mechanism or a spring support C34 formed on the Dovira mechanism, and when the door mechanism is opened, the spring 31 is displaced with the rotation of the door mechanism, and the spring 31 is displaced as the door mechanism rotates. When the door mechanism rotates a predetermined angle, the engagement of one end of the spring 31 extending laterally is changed from the spring support A32 to the spring support D35 on the main body side, and the other end extending downward is transferred from the spring support B33 to the spring support D35. Support C34
and wherein said spring mechanism reverses the direction of its moment relative to the position of action of said gravitational moment configuration.