JPH0258697B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for opening and closing a lid of a cassette loading section in, for example, a cassette type tape recorder.

For example, a cassette tape recorder is provided with a rotatable lid that closes the opening of the cassette loading section. Such a lid body is always urged in the opening direction by an opening spring, and is configured to be opened by releasing the locking mechanism in the closed position.

However, in this case, since the opening operation of the lid body is performed elastically by the opening spring, there is a problem in that vibrations are generated due to the impact during the opening operation.

Therefore, in the past, an air damper or the like was installed between the lid and the main body to reduce the impact when the lid was opened.

However, if an air damper or the like is attached, the configuration becomes complicated, and a space must be secured to accommodate the air damper, etc., which makes the design difficult.

The present invention has been made based on the above circumstances, and an object thereof is to provide a lid opening/closing device that has a simple structure, does not take up any extra space, and can reduce the impact when opening the lid. .

In order to achieve this purpose, the lid opening/closing device of the present invention has a sleeve fitted around the outer periphery of a fixed shaft that supports the lid via a cushioning material, and a coil member wound around the outer periphery of the sleeve. When the lid is rotated in the opening direction, the coil member contracts in diameter and tightens the outer circumference of the sleeve, causing the lid to rotate in the closing direction. When this happens, the coil member relaxes and loses its tightening force.

Hereinafter, details of the present invention will be explained based on illustrated embodiments.

In the figure, 1 is the main body of the cassette tape recorder, 2
is a lid that closes the opening of the cassette loading section. A cassette accommodating section 3 is provided inside the lid 2, and by opening the lid 2 as shown in FIG. 3, a tape cassette 4 can be stored in the cassette as shown by the imaginary line in FIG. It can be taken in and out of section 3.

A pair of bearing parts 5 are provided inside the main body 1,
Both ends of a fixed shaft 6 are fixed to both bearing portions 5 . Further, pivot pieces 7A and 7B provided on the left and right sides of one end of the lid body 2 are rotatably supported on the fixed shaft 6. Furthermore, an opening spring 8 is wound around the fixed shaft 6, and both ends of the spring 8 are connected to one pivot piece 7A.
By engaging with the main body 1, the lid body 2 is always urged in the open direction.

Further, a locking mechanism 9 is provided inside the main body 1. This locking mechanism 9 has a substantially L-shaped locking lever 11 that is rotatable about a shaft 10 and is attached to a spring 12.
The locking lever 11 is biased clockwise in the figure by
A locking pawl 11A provided at one end of the lid body 2 is engaged with an engagement step 13 provided at a rotating end portion of the lid body 2 to hold the lid body 2 in the closed position. In the figure, reference numeral 14 denotes an eject button that is provided on the main body 1 so as to be able to move forward and backward. When the eject button 14 is pushed in as shown in FIG. 11A can be removed from the engagement step 13 of the lid 2.

A sleeve 15 is rotatably fitted around the outer periphery of the fixed shaft 6, as shown in FIGS. 4 and 5. Silicone oil 16 is applied between the sleeve 15 and the fixed shaft 6 as a buffer material that provides resistance to the rotational movement of the sleeve 15. Further, a coil member 17 is tightly wound around the outer periphery of the sleeve 15. One end of this coil member 17 is locked to the other pivot piece 7B. When the lid body 2 rotates in the opening direction as shown by the solid line arrow in FIG. 5, the coil member 17 reduces in diameter and tightens the sleeve outer periphery, and moves in the closing direction as shown by the broken line arrow in FIG. It is constructed so that when it rotates, it relaxes and loses its tightening force against the sleeve 15.

Next, the operation of this embodiment will be explained.

First, to open the lid body 2, press the eject button 14.
Push the locking claw 11A of the locking lever 11 to the lid body 2.
What is necessary is just to remove it from the engagement step part 13 of. At this time, the lid body 2 attempts to rotate in the opening direction as shown by the solid line arrow in FIG. 2 rotates together with the sleeve 15. However, since silicone oil 16 is applied between the sleeve 15 and the fixed shaft 6, the viscosity of this silicone oil 16 acts as a resistance to the rotational movement of the sleeve 15, and the lid body 2 and sleeve 15 rotate slowly. That's what I'm going to do.

Next, in order to close the lid 2, it is sufficient to push the lid 2 directly from the outside. At this time, the cassette accommodating portion 3 of the lid body 2 comes into sliding contact with the locking pawl 11A of the locking lever 11, and closes while pushing the locking pawl 11A away. When the cassette accommodating portion 3 of the lid body 2 reaches the closing position, the locking pawl 11A closes the engaging step. 13 to hold the lid 2 in the closed position as shown in FIG. During the closing operation of the lid body 2, the coil member 17 loosens and loses its tightening force against the sleeve 15.
The closing operation can be performed quickly while slidingly contacting the outer periphery.

As described above in detail based on the embodiments, according to the lid opening/closing device of the present invention, it is possible to alleviate the impact during the lid opening operation with a simple configuration without using an air damper or the like. Further, since there is no need to secure extra space for an air damper or the like, the design becomes easier.

Note that the present invention is not limited to the above embodiments. For example, the cushioning material interposed between the sleeve and the fixed shaft may be a viscous material other than silicone oil, or may be filled with a slightly compressed sponge-like elastic material.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a cross-sectional view of a lid opening/closing device in a cassette tape recorder, Fig. 2 is a partial perspective view, and Fig. 3 shows the operation of the same part as Fig. 1. 4 is a partial sectional view showing the state, and FIG. 5 is a sectional view of the same portion as FIG. 4 viewed from the side. DESCRIPTION OF SYMBOLS 1... Main body, 2... Lid body, 6... Fixed shaft, 8... Spring for release, 9... Locking mechanism, 14... Eject button, 15
...Sleeve, 16...Silicone oil (buffer material),
17...Coil member.

Claims (1)

[Claims] 1. A lid rotatably supported on a fixed shaft is always biased in the open direction by an opening spring and held in a closed position by a locking mechanism, and this locking mechanism is connected to the lid. In the lid opening/closing device in which the lid is opened by the opening spring when the lid is removed, the sleeve is rotatably fitted around the outer periphery of the fixed shaft, and the sleeve is interposed between the sleeve and the fixed shaft. a cushioning material that resists the rotational movement of the sleeve; It is characterized by comprising a coil member that tightens the outer periphery of the diameter sleeve to rotate the lid body and the sleeve together, and loosens when the lid body rotates in the closing direction and loses the tightening force against the sleeve. Lid opening/closing device. 2. The lid opening/closing device according to claim 1, wherein the cushioning material is a viscous material. 3. The lid opening/closing device according to claim 2, wherein the viscous material is silicone oil. 4. The lid opening/closing device according to claim 1, wherein the buffer material is an elastic material and is inserted between the sleeve and the fixed shaft in a compressed state.