JPH051033Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an opening/closing device for opening/closing a cassette lid in a tape recorder, for example.

[Conventional technology]

Some cassette lids that are opened and closed when loading or unloading cassette tapes from a tape recorder also serve as cassette storage cases. It had a structure as shown in Figure 4. That is, the cassette storage case 3 is arranged in the opening of the cabinet 1, the pivot 4 of the cassette storage case 3 is fitted into the support hole 2 provided in the cabinet 1, and the cassette storage case 3 is rotated about the pivot 4 as a fulcrum. It can be installed freely. On the other hand, a support shaft 5 protruding from the cassette storage case 3 is fitted with a support portion of a torsion coil spring 6 and fixed thereto so as not to come off. One end of this torsion coil spring 6 is latched to a stop pin 7 protruding from the cabinet 1, while the other end of the torsion coil spring 6 is latched to a stop pin 8 protruding from the cassette storage case 3. As a result, the cassette storage case 3 is urged in the opening direction from the opening of the cabinet 1. Further, the cassette storage case 3 is locked with the cabinet 1 in its closed state by a locking mechanism (not shown).

[Problem that the invention attempts to solve]

However, in the conventional structure described above, due to the biasing force of the torsion coil spring 6, the speed of the opening operation of the cassette storage case 3 increases as it approaches the opening end, and a relatively loud collision noise is generated when the opening is completed. , there was a problem that it caused discomfort to the users. In addition, when the cassette storage case 3 is in the open end position, the biasing force of the torsion coil spring 6 acts strongly on the cassette storage case 3, so if the cassette storage case 3 is not pushed in strongly, it will not close. There was also the problem that it was not possible.

[Means for solving problems]

In order to solve the above-mentioned problems, the opening/closing device of the present invention has an opening/closing device that is attached in the opening direction of the opening/closing member between the opening/closing member (cassette storage case) which is pivotally attached to the opening of the cabinet so that it can be opened and closed, and the cabinet. A torsion coil spring is provided to force the
When the opening/closing member is in the closed state, a torsion is applied to the opening/closing member from a predetermined opening/closing angle of the opening/closing member at a remote part on the biasing direction side of the arm of the torsion coil spring that is stretched over the cabinet side. It is characterized by a protruding urging force connection/disconnection pin for connecting/disconnecting the urging force of the coil spring.

[Effect]

With the above configuration, when the opening/closing member is tilted by a predetermined angle in the opening direction, the urging force disconnection pin hits the arm of the torsion coil spring, and both operating ends of the torsion coil spring are latched to the same opening/closing member. Therefore, the torsion coil spring will no longer apply any biasing force in the opening direction of the opening/closing member.
Then, the biasing force of the torsion coil spring that has been applied up to that point causes inertia to act on the opening/closing member in the direction of the opening operation, so that the opening/closing member is opened at a relatively low speed until it reaches the opening end position. Therefore, the opening/closing member can be opened to the opening end position with almost no collision noise.

Furthermore, when pushing the opening/closing member in the closing direction, the biasing force of the torsion coil spring does not act on the opening/closing member until the above-mentioned predetermined opening/closing angle is reached, so the opening/closing member is relatively lightly closed until the above-mentioned predetermined angle is reached. This means that you will be able to do so.

〔Example〕

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

A cassette storage case 13, which also serves as a cassette lid and is opened and closed when loading or unloading a cassette tape into the tape recorder, is disposed at the opening of the cabinet 11 of the tape recorder. The cassette storage case 13 corresponds to an opening/closing member according to the present invention. A pivot shaft 14 is provided protruding from the lower part of the cassette storage case 13, and a support hole 12 is formed in the cabinet 11. The pivot shaft 14 is fitted into the support hole 12, and the cassette storage case 13 is attached to the pivot shaft 14. The opening of the cabinet 11 can be opened and closed by the cassette storage case 13.

On the other hand, a support shaft 15 is protruded from the cassette storage case 13 at a position slightly above the pivot 14, and a support portion of a torsion coil spring 16 is fitted onto this support shaft 15 and fixed to prevent it from coming off. . One end of this torsion coil spring 16 is attached to a stop pin 1 protruding from the cabinet 11.
7, while the other end of the torsion coil spring 16 is latched to a retaining pin 18 that projects slightly above the support shaft 15 of the cassette storage case 13. 13 is biased from the opening of the cabinet 11 in the opening direction.

Further, the extending portion 19 extending downwardly of the cassette storage case 13 is provided with a part that disconnects or connects the biasing force of the torsion coil spring 16 applied to the cassette storage case 13 from a predetermined opening/closing angle of the cassette storage case 13. A biasing force connecting/disconnecting pin 20 is provided protrudingly for this purpose. This biasing force disconnection pin 2
0 is a position slightly apart from the arm 16a of the torsion coil spring 16 stretched between the support shaft 15 and the stop pin 17 when the cassette storage case 13 is in the closed state;
It is set at a position on the biasing direction side of a.

Further, the cassette storage case 13 is equipped with a lock mechanism (not shown) that is locked with the cabinet 11 when the opening of the cabinet 11 is closed, and the lock mechanism can be released from the locked state. Then, the biasing force of the torsion coil spring 16 acts to open the cassette storage case 13.

In the above configuration, when the lock mechanism (not shown) is operated to release the locked state, the cassette storage case 13 begins to open due to the biasing force of the torsion coil spring 16. When the cassette storage case 13 is tilted by a predetermined angle in the opening direction about the pivot 14, the cassette storage case 13
A biasing force connecting/disconnecting pin 20 provided on the extending portion 19 of
However, the arm 16a of the torsion coil spring 16
corresponds to In this state, both operating ends of the torsion coil spring 16 are latched to the stop pin 18 and the biasing force disconnection pin 20, which are respectively protruded from the cassette storage case 13.
From then on, no biasing force is applied by the torsion coil spring 16 in the opening direction of the cassette storage case 13. However, due to the biasing force of the torsion coil spring 16 that has been applied up to that point, inertia acts on the cassette storage case 13 in the direction of the opening operation, so the cassette storage case 1
Coupled with the movement of the center of gravity accompanying the opening operation 3, the cassette storage case 13 is opened at a relatively low speed until it reaches the final opening position.

Next, when the cassette storage case 13 is pushed in the closing direction, the biasing force of the torsion coil spring 16 does not work on the cassette storage case 13 until the above-mentioned predetermined opening/closing angle is reached. It can be closed easily up to an angle. When the closing operation of the cassette storage case 13 passes through the above-mentioned angle, the biasing force of the torsion coil spring 16 acts, so when the cassette storage case 13 is pushed to the closing end position against the biasing force of the torsion coil spring 16, The locking mechanism will automatically operate and lock in the closed state.

In this embodiment, the cassette storage case 13 is shown as the opening/closing member, but other types of opening/closing members may be used, and it goes without saying that the opening/closing member is not limited to the opening/closing member used in tape recorders.

[Effect of idea]

As described above, the opening/closing device according to the present invention includes a torsion coil spring that biases the opening/closing member in the opening direction between the opening/closing member pivotally connected to the opening of the cabinet so as to be freely openable and closable, and the cabinet. , in the closed state of the opening/closing member, is applied to the opening/closing member from a predetermined opening/closing angle of the opening/closing member at a remote part on the biasing direction side of the arm of the torsion coil spring that is stretched over the cabinet side. It has a structure in which a biasing force disconnection pin is provided to protrude and disconnect the biasing force of the torsion coil spring.

As a result, the opening operation of the opening/closing member is prevented from applying the biasing force by the torsion coil spring from a predetermined angle, and the opening operation of the opening/closing member operates at a relatively low speed even when it approaches the end of opening. It makes almost no collision noise. Furthermore, when the opening/closing member is at a predetermined angle from the opening end position, the biasing force of the torsion coil spring is not acting on the opening/closing member, so it is possible to close the opening/closing member by simply pushing the opening/closing member lightly. It also has the effect of being able to do it.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention, in which Figure 1 is a longitudinal sectional view of the main part showing the closed state of the cassette storage case (opening/closing member), and Figure 2 is the cassette storage case (opening/closing member). FIGS. 3 and 4 show a conventional example. FIG. 3 is a longitudinal sectional view of the main part showing the cassette storage case in the closed state, and FIG. FIG. 3 is a longitudinal cross-sectional view of the main part showing the cassette storage case in an open state. 11 is a cabinet, 12 is a support hole, 13 is a cassette storage case (opening/closing member), 15 is a support shaft, 1
6 is a torsion coil spring, 16a is an arm,
17 and 18 are stop pins, and 20 is a biasing force connection/disconnection pin.

Claims (1)

[Scope of utility model claims] A torsion coil spring is provided between the opening and closing member pivotally connected to the opening of the cabinet so that it can be opened and closed, and the cabinet, and which biases the opening and closing member in the opening direction. An urging force for connecting and disconnecting the urging force of the torsion coil spring applied to the opening/closing member from a predetermined opening/closing angle of the opening/closing member to the opening/closing member at a remote part on the urging direction side of the arm of the torsion coil spring being passed. A switchgear characterized by a protruding connection/disconnection pin.