JPH0132234Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention particularly relates to a hinge for opening and closing the dust cover of a record player.

Conventional records are equipped with a compression coil spring to reduce the weight of the dust cover, hold it stably at an intermediate opening angle, and prevent it from closing suddenly and causing needle skipping. The player's dust cover opening/closing hinge has a supporting member that attaches the dust cover that is rotatably attached to the mounting member that also serves as a spring case with a hinge pin, and a slider that can be moved up and down by a compression coil spring is installed inside the mounting member. It is known that a support pin provided on the support member side is pivotally attached to the slider, or a support pin provided on the support member side is brought into contact with the top surface of the slider.

However, the former has the disadvantage that the structure is complicated because the slider must swing while moving up and down, and the latter has the disadvantage that the point of action of the support pin on the slider changes depending on the opening/closing angle of the dust cover. Another drawback was that the slider could not be expected to slide smoothly.

This invention solves these problems, and will be explained in detail below based on an embodiment shown in the drawings. A mounting member 3 consisting of a spring case portion 3a constituting one hinge piece and hinge pin mounting portions 3b, 3b is housed in the storage hole 2. Among these, in the spring case part 3a, there are a plurality of recesses 4a, 4b, 4c in the front longitudinal direction.
A flat plate-shaped slider 4, which has an operating pin 4d passing through the upper part from left to right and a spring fitting hole 4e in the lower part, is housed so as to be slidable in the vertical direction, and this slider 4 and the spring case part 3a
A compression coil spring 5, which is partially fitted into the spring fitting hole 4e, is elastically installed between the spring fitting hole 4e and the bottom of the spring fitting hole 4e. Further, the inner wall of the spring case portion 3a has recesses 4a, 4b of the slider 4,
A leaf spring 6 is attached which makes fitting contact with 4c.

7 includes a substrate 7a, a dust cover holding portion 7b erected in an angular shape on the substrate 7a, and a substrate 7a.
A passive piece 7 having a pressure receiving part 10 protruding from the lower part of a
c, 7c and hinge pin attachment parts 7d, 7d.The rear lower end of the dust cover 8 is fitted into the vertical groove 7e provided in the dust cover holding part 7b, and the pressure receiving parts 10, 10 are attached to the slider 4. The hinge pin mounting portions 7d and 7d are rotatably connected to the hinge pin mounting portions 3b and 3b of the mounting member 3 by a hinge pin 9, which is brought into contact with an operating pin 4d protruding from both surfaces.

In addition, as other embodiments, the passive pieces 7c, 7
An elongated hole may be provided in c, and the actuating pin 4d may be engaged with this elongated hole. Further, as a means for suppressing the vertical movement of the slider 4 at a predetermined position, for example, the slider 4 may be provided with a convex portion, and the spring case portion 3a may be provided with a concave portion that fits into the convex portion.

Next, to explain the effect of this device, the third
As shown in the figure, when the dust cover 8 is closed, the slider 4 is connected to the pressure receiving portions 10 and 1 of the support member 7.
0 via the actuation pin 4d,
The dust cover 8 is lowered against the elasticity of the compression coil spring 5, and the leaf spring 6 is fitted into the recess 4a, thereby stabilizing the closed state of the dust cover 8. In this state, the distance between the axes of the hinge pin 9 and the actuating pin 4d is close to the shortest distance, as shown in FIG.

When the dust cover 8 is pushed open, the compression coil spring 5 is always applied to the slider 4.
and the pressure receiving part 1 of the support member 7 via the operating pin 4d.
Since the plate spring 6 encounters some resistance when it escapes from the recess 4a of the slider 4, it can be opened without feeling the weight too much. In the embodiment, when the slider 4 is opened approximately 35 degrees, the recess 4b of the slider 4 is fitted with the leaf spring 6, and the elasticity of the compression coil spring 5 is approximately balanced with the weight of the dust cover 8. , it stably stops at this open angle position and will not close even if you release your hand or even if a slight impact is applied from the outside.

In this state, the distance between the hinge pin 9 and the operating pin 4d is longer than when the dust cover 8 is in the open position, as also shown in FIG.

Of course, even if the recess 4b provided in the slider 4 and the leaf spring 6 do not fit together, the dust cover 8 can be stopped stably by appropriately selecting the elasticity of the compression coil spring 5. However, if this means is adopted, stable stopping will be ensured even if there are variations in the elasticity of the compression coil spring.

Next, when the dust cover 8 is further pushed open, the dust cover 8 encounters some resistance when the leaf spring 6 escapes from the recess 4b of the slider 4, and then the dust cover 8 is moved by the elasticity of the compression coil spring 5 as described above. It opens without feeling much weight,
At the opening angle of 65 degrees, the leaf spring 6 is fitted into the recess 4c of the slider 4 for the third time, and the elasticity of the compression coil spring 5 is not strong enough to release the fitted state between the leaf spring 6 and the recess 4c. The dust cover 8 stably stops at this opening angle. At this time, the stepped portions 7f provided on the hinge pin attachment portions 7d, 7d of the support member 7,
7f comes into contact with the rear part of the spring case portion 3a of the mounting member 3, so the dust cover 8 will no longer be opened. And in this state,
As shown in FIG. 5, the interaxial distance between the hinge pin 9 and the operating pin 4d is longer than the intermediate open position of the dust cover 8.

Next, when closing the dust cover 8, by pushing it downward, the slider 4, which is pushed downward by the pressure receiving parts 10, 10 via the actuating pin 4d, descends against the elasticity of the compression coil spring 5. As a result, the dust cover 8 is closed and stably stopped at an opening angle of about 35 degrees for the reason mentioned above, and is completely closed when it is further pushed downward. and,
When it is closed, the elasticity of the compression coil spring 5 prevents it from closing suddenly.

In the closing operation of the dust cover 8, the distance between the hinge pin 9 and the operating pin 4d gradually becomes shorter, returning to the original state.

In this way, in this invention, the distance between the hinge pin 9 that constitutes the rotation fulcrum of the dust cover 8 and the actuation pin 4d that constitutes the support fulcrum of the dust cover 8 is determined by the opening/closing angle of the dust cover 8. and this change is caused by slider 4.
This appears as a change in the contact position of the operating pin 4d provided on the side with respect to the pressure receiving part 10, and as the dust cover 8 is opened, the contact position moves toward the front of the dust cover. Coupled with the change in elasticity of the compression coil spring 5,
The hinge torque ideally produces the ability to quietly close the dust cover 8 below a certain opening angle, hold it stably at an intermediate opening angle, and automatically open the dust cover 8 above a certain opening angle. .

Furthermore, when the dust cover 8 is opened and closed, that is, when the support member 7 is rotated, the point of action of the slider 4 on the pressure receiving parts 10, 10 always coincides with the line of action of the compression coil spring 5 and does not change. In addition to being able to bring out the stable elasticity of the street,
It is possible to promote smooth sliding of the slider 4, thereby providing a hinge having a torque curve as designed.

Next, when removing the dust cover 8 from the cabinet 1, only the dust cover 8 can be removed from the hinge by first pulling out the rear end of the dust cover 8 from the dust cover holding part 7b, and Hinge spring case part 3
By pulling a upward from the storage hole 2,
The dust cover 8 can be removed from the cabinet 1 at each hinge.

Next, when attaching the dust cover 8 to the cabinet 1, first, when only the dust cover 8 is removed, the rear end portions of both sides thereof are inserted into the vertical grooves 7e provided in the dust cover holding portion 7b of the support member 7. It is sufficient to press down on the spring case part 3 of the mounting member 3 when the dust cover 8 is removed from the cabinet 1 at each hinge.
All you have to do is place a on the entrance of storage hole 2 and press down in the same way.

As explained in detail above, this invention has a simple structure that allows the dust cover to be opened and closed without making the user feel the weight of the dust cover, and allows the dust cover to fall silently by itself at a certain opening angle or less. We provide a hinge with a torque curve that matches the designed value, which can stably stop and hold at intermediate opening angles, automatically open the lid above a certain opening angle, and allow the slider to slide smoothly. It can have the effect of being able to do it.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and Fig. 1 is a plan view thereof, Fig. 2 is a rear view of the same, Fig. 3 is a sectional view of the same side, and Fig. 4 is a sectional view of the same side when the dust cover is opened. 5 are explanatory diagrams showing the relationship between the hinge pin and the operating pin. 1... Cabinet, 2... Storage hole, 3a...
Spring case part, 3b... Hinge pin mounting part, 3... Mounting member, 4... Slider, 4a,
4b, 4c... recess, 4d... operating pin, 5...
Compression coil spring, 6...Plate spring, 7...Supporting member, 7b...Dust cover holding part, 7c...
Passive piece, 7d... Hinge pin attachment part, 8... Dust cover, 9... Hinge pin, 10... Pressure receiving part.

Claims (1)

[Claims for Utility Model Registration] 1. A mounting member having at least a spring case portion and a hinge pin mounting portion, and a mounting member that is slidably housed within the spring case portion and is urged to move in one direction by a compression coil spring. the slider, a support member for holding the dust cover rotatably connected to the hinge pin attachment part by a hinge pin, and a pressure receiving part provided on the support member and in contact with the top of the slider, and the support member 1. A hinge for opening and closing a dust cover of a record player, characterized in that the point of action of the slider on the pressure receiving part and the line of action of the coil spring always coincide with each other during rotation of the dust cover of a record player. 2. For opening and closing the dust cover of a record player as set forth in claim 1 of the utility model registration claim, characterized in that the slider is provided with a control means for suppressing its vertical movement at a predetermined position. Hinge.