JPS5914803B2 - Lid opening/closing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lid opening/closing device used in, for example, a cassette tape recorder.

For example, in a cassette tape recorder, when a cassette is inserted into a cassette accommodating section provided on the lid of the machine and the lid is closed, the cassette is automatically loaded, while when the eject button is pressed, the lid opens. There is known a structure in which the cassette can be taken out by touching the cassette.

However, -5 with this type of conventional cassette tape recorder, when the eject button is pressed when opening the lid, the lid is opened by the force of the spring, and when the lid is closed, the lid resists the force of the spring. Since the lid is closed by pressing with a relatively strong force, the opening/closing operation of the lid is sudden and can cause shocks.
In addition, a relatively large impact sound was generated, which sometimes caused discomfort. Further, since the opening/closing device for the lid body has a structure that is specially incorporated for each model, it cannot be used for other models, and there is a drawback that there is no compatibility. ■5 This invention was made in view of the above circumstances, and can buffer the opening/closing operation of the lid body and alleviate the impact force generated at that time. Moreover, it can be made into a unit and can be easily incorporated into various devices. To provide a lid opening/closing device that is flexible, compatible, and capable of adjusting the opening speed of the lid.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

Reference numeral 1 in FIGS. 1 and 2 is the main body of the cassette tape recorder. A buffer mechanism 2 is attached to this main body 135, and a lid 3 is attached to this buffer mechanism 2. The buffer mechanism 2 is constructed as shown in FIGS. 3 to 5. That is, a wheel 6 is provided on one side of a mounting member 5 having a generally disk shape and having a circular hole 4 approximately at its center. Furthermore, an annular projection R, 8 is provided approximately at the center of one side of the mounting member 5. Further, annular protrusions 9 and 10 are provided on the peripheral edge of one side of the wheel 6, and an annular recess 1 is provided on the other side.
Further, a wheel 13 is provided on the other side of the wheel 6. On one side of the wheel 13, annular projections 14 and 15 are provided opposite to the recesses 11 and 12 of the wheel 6, respectively, and a shaft portion 16 is provided at the center thereof. This shaft portion 16 is provided with a recess 1r. Further, an annular projection 18 is provided on the other side of the wheel 13. Furthermore, wheel 13
The shaft portion 16 is rotatably passed through the center of the wheel 6, and then press-fitted into the circular hole 4 of the mounting member 5. This allows the mounting member 5 and the wheel 6 to rotate relative to each other. Further, a mainspring 19 is disposed between the protrusion 8 of the attachment member 5 and the protrusion 9 of the wheel 6, and one end of the mainspring 19 is attached to the protrusion 8, and the other end is attached to the protrusion 9. Further, a ratchet wheel 20 is provided on the other side of the wheel 13. One side of the ratchet wheel 20 has an annular recess 21 and an annular protrusion 2.
2 is provided, and furthermore, a shaft portion 23 is provided at the center thereof. Further, a recess 24 is provided on the other side of the ratchet wheel 20, a projection 25 is provided in the center thereof, and a recess 26 is provided in the projection 25. Furthermore, teeth 24a are provided on the inner peripheral surface of the recess 24. Further, the ratchet wheel 20 has its shaft portion 23 rotatably fitted into the recess 1r of the wheel 13, and the projection 18 of the wheel 13 is loosely fitted into the recess 21.
A wheel 6 is press-fitted onto the inner circumferential surface of the holder. In addition,
A gap is provided between the ratchet wheel 20 and the wheel 13 and between the wheel 13 and the wheel 6, and a buffer liquid 27 such as highly viscous grease is sealed in this gap. Further, on the other side of the ratchet wheel 20, a mounting member 29 having a generally disk shape having a circular hole 28 approximately in the center is provided. Furthermore, approximately half-moon-shaped holes 30 and 31 are formed on both sides of the circular hole 28. As a result, a bridge-like part 32 is formed approximately at the center of the mounting member 29, and a curved engagement arm 3 having elasticity is formed at an appropriate position of this bridge-like part 32.
3 and 33 extend, and protrusions 34 and 34 are provided at the tips of each of these engagement arms 33 and 33, respectively. The engaging arms 33, 33 and the protrusions 34, 34 form an engaging portion. The mounting member 29 has its circular hole 28 rotatably fitted into the protrusion 25 of the ratchet wheel 20, and the distal ends of the engaging arms 33, 33 are engaged with the teeth 24a of the ratchet wheel 20. The flanged bush 35 is press-fitted into the recess 26f, thereby preventing it from coming off. The mounting member 5 is provided with a protruding mounting portion 36 and a hole 37, and the mounting member 29 is provided with a protruding mounting portion 38 and a hole 39, respectively. Next, a case where the buffer mechanism 2 configured as described above is attached to the main body 1 and the lid 3 will be described. First, with the biasing force of the mainspring 19 set to O, for example, the mounting portion 38 of the mounting member 29 is fitted into the mounting hole 1a provided in the main body 1, and then the screw 40 is screwed into the main body 1 through the hole 39. , attach the mounting member 29 to the main body 1, fit the mounting part 36 of the mounting member 5 into the mounting holes 3a & C provided in the lid body 3, and then insert the screw 41 through the hole 37.
is screwed into the lid body 3 to attach the mounting member 5 to the lid body 3, and then, if necessary, rotate the ratchet spring 20 in a predetermined direction to appropriately wind the mainspring 19 to apply a biasing force to the mainspring 19. It is used to store. Note that the buffer mechanism 2 may be attached to the main body 1 and the lid 3 with the spring 19 storing biasing force in advance. Furthermore, holes 1b, 1b are formed in the main body 1, corresponding to the protrusions 34, 34. Next, the operation of the above-mentioned component device will be explained.

In addition, FIG. 1 shows the state in which the lid body 3 is opened with imaginary lines,
A state in which the lid body 3 is closed is shown by a solid line. When a force set is put into the force set accommodating portion of the lid 3 in the open position shown by the imaginary line, and the lid 3 is closed in the position shown by the solid line,
When the lid body 3 is pushed in the direction of arrow c, the mounting member 5 and wheel 13 rotate in the direction of arrow c with respect to the mounting member 29, ratchet wheel 20, and wheel 6, and as a result, the mainspring 1
9 is wound and this mainspring 19 (this biasing force is stored,
On the other hand, the lid body 3 is closed and a stopper (not shown) is placed on the main body 1.
It can be stopped by. Next, when opening the lid 3 from the state shown by the solid line in Fig. 1 to the state shown by the imaginary line to take out the force set, operate the eject button to remove the stopper that stops the lid 3. , the mounting member 29, the ratchet wheel 20, by the urging force stored in the mainspring 19,
The mounting member 5 and the wheel 13 rotate in the direction of arrow 0 with respect to the wheel 6, and the lid 3 opens. At this time, the opening speed of the lid body 3 is reduced by the resistance force caused by the viscosity of the buffer liquid 27, and the rotational speed of the mounting member 29, the ratchet wheel 20, and the rotational speed of the mainspring 19 of the mounting member 5 and the wheel 13 relative to the wheel 6. It will be a slow-cooked one.
Also, for example, when the viscosity of the buffer solution 27 becomes lower or higher due to the weight of the lid 3 or due to a rise or fall in the ambient temperature of the lid 3, the opening speed of the lid may be adjusted. In this case, two operating rods (not shown) are inserted into the holes 1b, 1b of the main body 1 and attached to the protrusions 34, 34, respectively, and the operating rods are operated to bring the protrusions 34, 34 closer to each other. The distal ends of the engaging arms 33, 33 are removed from the teeth 24a of the ratchet wheel 20, and the ratchet wheel 20 is further rotated, thereby rotating the wheel 6 relative to the mounting members 5, 29.
Adjust the degree of engagement of the engagement arms 33, 33 again.
What is necessary is to engage the tip portion of the ratchet wheel 20 with the teeth 24a of the ratchet wheel 20. In the above embodiment, the mounting member 5 was directly attached to the lid body 3, but the present invention is not limited to this, and as shown in FIG. The other end may be rotatably attached to a mounting portion 43 provided on the lid 3, and in this case as well, the lid 3 can be opened and closed via the connecting bar 42 as in the previous embodiment.

Furthermore, the buffer mechanism 2 is not limited to the mounting method as in the above embodiment, and for example, the mounting member 5 may be mounted on the main body 1 and the mounting member 29 may be mounted on the lid body 3. has described an example in which the buffer mechanism 2 is attached to a force set tape recorder, but the present invention is not limited to this, and the buffer mechanism 2 may be attached to the main body of other equipment and its lid.

As described above in detail, the present invention provides a ratchet wheel that is rotatably provided between two mounting members that face each other and rotate relative to each other, and one of the mounting members. A mainspring and a buffer are provided in between to bias the ratchet wheel and one mounting member in opposite rotation directions, and to buffer the rotation of the ratchet wheel and one mounting member, so that the teeth of the ratchet wheel are An elastic engagement part detachably provided on the other mounting member is operable from the male part of the mounting member, and both mounting members are connected to a lid body and a mounting body to which the lid body is attached so as to be openable and closable. Since the structure allows for mounting on the mainspring, the relative rotational speed of the two mounting members due to the force of the mainspring is alleviated by the buffering action of the buffer solution, thereby buffering the opening/closing operation of the lid and reducing the impact force generated at that time. In addition, the impact noise generated at that time is reduced and does not cause discomfort. In addition, since it has a built-in ratchet wheel, mainspring, and buffer between both mounting members, it can be made into a unit as a whole, and it can be made smaller, and it is interchangeable. It can be easily incorporated into various devices, and the opening speed of the lid can be adjusted.
It has effects such as a wide range of applications.

[Brief explanation of drawings]

Fig. 1 is a partially omitted side view showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional front view of a part thereof, Fig. 3 is a longitudinal sectional view of the main part of the invention, and Fig. 4 is one thereof. FIG. 5 is a partially cutaway plan view, FIG. 5 is a partially omitted bottom view, and FIG. 6 is a partially omitted side view showing another embodiment of the present invention.
...Buffer mechanism, 3...Lid body, 5...
・Mounting member, 6...Wheel, 13...
・Wheel, 19...Spring, 20...
...Ratchet wheel, 2r...Buffer solution, 2
9...Mounting member.

Claims (1)

[Claims] 1. Two mounting members facing each other so as to be relatively rotatable, and between these two mounting members, a large number of teeth are provided on the inner periphery in a manner that is rotatable relative to these two mounting members. The ratchet wheel is provided between the ratchet wheel and one of the mounting members, and biases the ratchet wheels and one of the mounting members in mutually opposite rotational directions. A mainspring whose winding degree changes depending on relative rotation with the mounting member, and a buffer liquid provided between these ratchet wheels and one mounting member to buffer the relative rotation between these ratchet wheels and one mounting member. and an elastic engagement portion provided on the other mounting member so that it can be operated from the outside of the other mounting member and can be freely engaged with and detached from the teeth of the ratchet wheel, and the engaging portion has an elastic engagement portion provided on the other mounting member so as to be operable from the outside of the other mounting member. 1. An opening/closing device for a lid body, characterized in that it can be used by being interposed between a body and a mounting body to which the lid body is attached so as to be openable and closable.