JPS6319983Y2 - - 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.

This type of dust cover opening/closing hinge is used to prevent the dust cover from closing suddenly and cause the needle to jump, or to support the dust cover at an intermediate opening angle, and to prevent the dust cover from closing suddenly and causing the needle to fly. In order to facilitate lead-in operations of the arm, the dust cover generally has a function to reduce or balance the weight of the dust cover.

Among these, the hinge installed between the rear end of the record player's cabinet and the rear end of the dust cover, commonly called the rear hinge, gives a rugged impression to the rear of the record player, which has a strong furniture-like element. Since the hinge that provides the dust cover is exposed, it spoils the overall appearance of the record player.Also, when the dust cover is opened, the rear of the dust cover protrudes beyond the rear of the cabinet, making it difficult to set up the record player. The disadvantage was that extra space had to be carved out.

On the other hand, a hinge installed between the rear side of the record player's cabinet and the rear side of the dust cover, commonly called a side hinge, is
Since the pivot point of the dust cover moves further forward than when using a rear hinge, it is possible to prevent the rear part of the opened dust cover from protruding to the rear of the cabinet. , or you have to delete it,
There was a drawback that it was easier for dust to get in from here.

It is also known that the torque curve associated with the opening/closing operation of the dust cover draws a sine curve as shown by the solid line in Figure 1. Therefore, the opening/closing device used for opening and closing this type of dust cover is In order to perform the above-mentioned functions, it is desirable that the opening/closing device has a torque that draws a curve as shown by the dotted line in FIG. 1 when opening and closing.

Therefore, the purpose of this invention was to solve the various drawbacks of the prior art described above while retaining the torque and various functions that are required of this type of dust cover opening/closing device, as well as to To provide a hinge for opening and closing a dust cover, especially for a record player, which can be easily replaced, its elasticity can be adjusted, and has a minimized number of parts.

This invention will be explained in detail below based on an embodiment shown in the drawings.A mounting hole 2 is provided at the rear inner end of a synthetic resin dust cover 1, and the lower end of the dust cover 1 is provided with a mounting hole 2. The support member 3, which constitutes one hinge piece, has a passive piece 3a and a mounting part 3b on its part, and the insertion part 3c is attached thereto so as to be freely inserted and removed. In the storage hole 5 provided on the inside of the rear end of the cabinet 4, there is a hollow cylindrical mounting member 6, which constitutes the other hinge piece, and consists of a spring case part 6a and hinge pin mounting parts 6b, 6b.
is included.

A cylindrical slider 7 is housed in the spring case portion 6a of the mounting member 6 so as to be vertically movable.The slider 7 has a hollow spring housing portion 7a and a hollow spring housing portion 7a. A pair of support pin attachment parts 7b, 7 protruding from the upper end
b, and a support pin 8 that is pivoted between the support pin mounting portions 7b, 7b.

Then, the mounting portion 3b of the support member 3 connects the hinge pin 9 to the hinge pin mounting portions 6b, 6b of the mounting member 6.
The support pin 8, which is rotatably mounted on the support pin mounting portions 7b, 7b of the slider 7, comes into contact with the bearing portion 3d provided on the passive piece 3a of the support member 3. At the same time, a bottom cover 10 is screwed directly onto the bottom of the spring case portion 6a of the mounting member 6 so as to be movable in the axial direction, and a compression coil spring 11 is elastically installed between the bottom cover 10 and the top of the slider 7. ing.

Now, if we use a compression coil spring 11 with elasticity that almost balances the torque when the dust cover 1 is opened approximately 35 degrees, the weight of the dust cover 1 will be reduced when the dust cover 1 is closed. is stronger than the elasticity of the compression coil spring 11, so the dust cover 1 stably maintains the closed state, and the support pin 8 provided on the slider 7 is located at the right starting end of the bearing portion 3d. When the dust cover 1 is opened from this state, the dust cover 1 is opened by the elasticity of the compression coil spring 11 without making the user feel the weight of the main body. The contact position for the object changes by gradually increasing its movement pitch. and,
Since the weight of the dust cover 1 that the support pin 8 receives is balanced in the range of about 20° to 45° and the elasticity of the compression coil spring 11 that pushes up the support pin 8, the dust cover 1 can be opened within this opening angle range. Stably supported. When the dust cover 1 is further opened from this position, the movement width of the support pin 8 relative to the bearing portion 3d rapidly increases, the support position moves forward, and the weight of the dust cover 1 applied to the support pin 8 also decreases. Therefore, the repulsive force of the compression coil spring 11 begins to overcome, and the dust cover 1 is automatically pushed upward and opened.

The automatically pushed open dust cover 1 stops when the protrusion 3e provided on the attachment portion 3b of the support member 3 comes into contact with the protrusion 6c of the hinge pin attachment portion provided on the attachment member 6. This angle is approximately 60° in the exemplary embodiment.

Next, the dust cover 1 opened in this way
When closing, due to the elasticity of the compression coil spring 11, which is initially dominant in elasticity,
Although a certain amount of pressing force is required, in the range of about 45° to 20°, the torque of the dust cover 1 and the elasticity of the compression coil spring 11 are almost balanced, and at a position exceeding 20°, the support pin 8 Since the weight applied to the support pin 8 of the dust cover 1 in section 3d begins to exceed the elasticity of the compression coil spring 11, as shown in FIG. The gap between the change and the sin curve increases rapidly, and the dust cover 1 is automatically closed.

After the assembly is completed, the elasticity of the compression coil spring 11 can be freely and finely adjusted by rotating the bottom cover 10 in the axial direction, and it can also be easily replaced if necessary. It is something that can be done.

Further, when the dust cover 1 is opened and pulled diagonally upward, the insertion portion 3c of the support member 3
can be pulled out from the mounting hole and easily removed from the cabinet 4.

In the embodiment, the cylindrical mounting member 6 embedded in the cabinet 4 was used to accommodate the slider 7;
It may be directly inserted into the storage hole 5 provided in the. However, in this case the support member 3 is rotatably attached to the cabinet 4 by another member.

As explained in detail above, this idea prevents the mounting member from being exposed to the rear of the cabinet and giving a rugged impression, and prevents the rear part of the opened dust cover from protruding to the rear of the cabinet as much as possible. In addition, it is possible to create a torque curve that is extremely close to the ideal torque curve required for this type of dust cover opening/closing device, and the elasticity of the compression coil spring used in a simple configuration with as few parts as possible. The compression coil spring can be adjusted, and the compression coil spring can be easily replaced if necessary.

[Brief explanation of the drawing]

FIG. 1 is a graph showing the ideal torque curve that a dust cover and this type of dust cover opening/closing hinge are required to have, and FIG. 2 is a plan view of the dust cover opening/closing hinge according to this invention. Third
4 is a sectional view of the same side, FIG. 5 is a sectional view of the same side with the dust cover opened, and
The figure is a graph of the torque curve shown by the hinge according to this invention. 1... Dust cover, 2... Mounting hole, 3... Support member, 3d... Bearing part, 4... Cabinet,
5... Storage hole, 6... Mounting member, 7... Slider, 8... Support pin, 9... Hinge pin, 10...
...Bottom lid, 11...Compression coil spring.

Claims (1)

[Scope of utility model registration request] A mounting member having a cylindrical spring case part that is stored in a storage hole provided on the cabinet side, and a support member that supports the dust cover and is rotatably attached to this mounting member via a hinge pin. a bottom cover attached to the bottom of the spring case section; and a bottom cover that is vertically movably inserted into the spring case section and supports the support member at a position away from its pivot point with a support pin provided at the top. The bottom cover is screwed directly onto the spring case, and the spring is rotated left and right by screwing the bottom cover directly onto the spring case. A hinge for opening and closing a dust cover of a record player, characterized in that the elasticity is adjustable.