JPS63261593A - Rubber vibration insulator for unit mechanism - Google Patents

Abstract

PURPOSE:To prevent the deformation of a rubber flange part and to improve the assembling workability by increasing the size between the lower end of a groove part of the rubber where a lock bar of a unit mechanism is inserted and the flange part compared with the size set when the unit mechanism is fixed at a chassis. CONSTITUTION:In a vibration insulating mechanism for a CD player, etc., the size between the lower end of a groove part 6b of a rubber 6 and a flange part 6c, i.e., the height H of the rubber 6 is increased. A coil spring 4 is attached over the rubber 6 and the lower end of the spring 4 is locked by the part 6c of the rubber 6. Furthermore the upper end of the spring 4 is pushed lower than the part 6b of the rubber 6. Under such conditions, the part 6b is inserted into a locking piece 1a of a unit mechanism 1. In other words, the spring 4 is positioned between the piece 1a and the frange part 6c of the rubber 6. In such a constitution, the flexure value of the spring 4 is decreased and therefore the spring force is reduced. As a result, the spring 4 is surely attached without deforming the rubber 6.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a vibration isolating rubber for a unit mechanism, and in particular, it can be used in a vibration isolating mechanism of a CD player etc.
The present invention relates to a vibration-proof rubber for unit mechanisms that can improve the productivity of sets such as players.

[Conventional technology]

A conventional anti-vibration mechanism for a CD player or the like is shown in FIG. 2 when assembled. That is, the unit mechanism 1 is fixed to a chassis 2 forming the bottom of the case with stepped screws 5 with washers via rubber 3 and a coil spring 4.

When fixing the unit mechanism 1 to the chassis 2, first incorporate the rubber 5 into the locking piece 1a of the unit mechanism 1, and then
Connect the coil spring 4 to the locking piece 1a and the rubber 5 from below the rubber 3.
It is installed so that it is located between the collar part 3a of the

By the way, as shown in FIG. 3, the conventional rubber 3 has the same height H' as h in FIG. 2 when it is fixed to the chassis 2. Therefore, as shown in FIG.
When a coil spring 4 having a length L greater than H' is installed, as shown in FIG. .

Or, as shown in Fig. 8, the lower end of the coil spring 4 is made of rubber 5.
The end protrudes from the flange portion 5a and becomes a free end.

Therefore, when attempting to fix the unit mechanism 1 to the chassis 2 after that, the work was difficult.

Further, in the case shown in FIG. 8, the coil spring 4 tends to come off when it comes into contact with other parts, so the assembly worker had to carry out the assembly work while visually checking that the coil spring 4 does not come off.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, the flange 5a of the rubber 3 is deformed during assembly work, or the lower end of the coil spring 4 protrudes from the flange 3a of the rubber 3 and becomes a free end, resulting in poor assembly workability. Therefore, there was a problem in that the productivity of sets such as CD players was poor. The purpose of the present invention is to
An object of the present invention is to provide a vibration-proof rubber for a CD player that has good assembly workability and can therefore improve the productivity of the CD player.

[Means for solving problems]

The above purpose is to determine the dimension from the lower end of the rubber groove into which the locking piece 1a of the unit mechanism 1 is inserted to the collar.

This is achieved by making the dimensions larger than those of the unit mechanism when it is fixed to the chassis.

[Effect]

Attach the coil spring from the top of the rubber so that the lower end of the coil spring is locked with the collar of the rubber.

Further, the upper end of the coil spring is pushed down from the groove of the rubber, and the groove of the rubber is inserted into the locking piece of the unit mechanism to fix it to the unit mechanism such as the rubber and coil spring. At this time, in the present invention, since the dimension from the bottom end of the rubber groove to the collar is thicker than that of the conventional rubber, the amount of deflection of the coil spring is reduced.

As a result, according to the present invention, since the rubber collar does not deform or the lower end of the coil spring does not protrude beyond the rubber collar, assembly work efficiency is improved, and therefore, the set of the CD player, etc. can improve productivity.

〔Example〕

Hereinafter, the present invention will be explained using the drawings.

FIG. 1 is a sectional view showing an embodiment of the vibration-proof rubber of the unit mechanism of the present invention.

As shown in FIG. 4, the rubber 6 of this embodiment has a dimension from the lower end of the groove 6b to the collar 6o, that is, the height H, which is equal to the height H' of the conventional rubber 5 (FIG. 3). It is set to be larger than that. Specifically, the height H of the rubber 6 in this embodiment is set to be approximately 1.1 to 1.6 times the height H' of the conventional rubber 3.

In other words, the height H is 1.1-1.
It is set to about 6 times.

A coil spring 4 (FIG. 5) is attached to the top of the rubber 6 so that the lower end of the coil spring 4 is locked by the collar 6c of the rubber 6. Further, with the upper end of the coil spring 4 pressed down below the rubber groove 6b, the groove 6b is inserted into the locking piece 1a of the unit mechanism 1. That is, the coil spring 4 is installed so as to be located between the locking piece 1a of the unit mechanism 1 and the collar portion 3a of the rubber 5.

This state is shown in FIG.

As is clear from Fig. 7, in this embodiment, since the height H is large, the amount of deflection of the coil spring 4 is smaller than in the conventional example (see Fig. 6), and therefore the spring force is weak. Therefore, the coil spring 4 can be reliably attached without deforming the rubber 6.

Further, when the unit mechanism 1 is fixed to the chassis 2 together with the rubber 6 and the coil spring 4 using the stepped screw 5 with a washer, the rubber 6 bends due to the weight of the unit mechanism 1, as shown in FIG. As a result, the height H of the rubber 6 becomes the same as the height h shown in FIG. 2 in the final assembled state.

FIG. 9 is a sectional view showing another embodiment of the vibration isolating rubber of the unit mechanism of the present invention.

As shown in FIG. 9, the rubber 60 of this embodiment has a recess 60a formed on its circumferential surface. In other respects, it has exactly the same shape as the rubber 6 of the above-described embodiment (FIG. 1).

In this embodiment, by forming the recess 60a on the circumferential surface of the rubber 60, the unit mechanism 1 can be fixed to the chassis 2 together with the rubber 60 and the coil spring 4, as described in the previous embodiment. weight K
The rubber 60 is bent more, but at this time, the rubber 60 is surely bent into the inside of the rubber 60 using the recess 60a as a fulcrum. This state is shown in FIG.

As a result, according to this embodiment, the rubber 60 and the coil spring 4
unnecessary friction is completely avoided.

That is, according to this embodiment, there is no decrease in the compliance of the coil spring 4 due to the friction (therefore, there is no decrease in the vibration damping performance due to the height H being larger than H'). .

In the embodiment shown in FIG. 9, four portions 60a are formed on the circumferential surface of the rubber 60, but instead of the recesses 40a, pressure is applied to provide holes at equal intervals, and due to the weight of the unit mechanism 1. Similarly to FIG. 9, pressure may be applied to ensure that the rubber is bent inside.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, during the assembly work in which the anti-vibration rubber and the coil spring are fixed together in a unit mechanical set, the collar of the anti-vibration rubber is deformed, or the lower end of the coil spring is Since the vibration-proof rubber does not protrude beyond the flange portion and become a free end, the assembly work can be easily performed, and as a result, the productivity of sets such as CD players can be improved.

Further, since the lower end of the coil spring does not become a free end, there is no fear that the coil spring will come into contact with other parts and come off, and therefore there is no need for the operator to visually check that the coil spring does not come off.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention, FIG. 2 is a view showing a conventional state in which a unit mechanism is fixed to a chassis, FIG. 5 is a cross-sectional view showing an example of a conventional anti-vibration rubber, and FIG. Figure 4 is a diagram showing a state in which the unit mechanism is fixed to the chassis using vibration isolating rubber according to an embodiment of the present invention, Figure 5 is a side view of a coil spring attached to the vibration isolating rubber, Figures 6 and Fig. 8 is a diagram for explaining the problems that occur when using the conventional anti-vibration rubber shown in Fig. 3, and Fig. 7 shows a unit mechanism using the anti-vibration rubber shown in Fig. 1 equipped with a coil spring. FIG. 9 is a sectional view showing another embodiment of the present invention;
The figure shows a state in which the unit mechanism is fixed to the chassis using the vibration isolating rubber shown in FIG. 9. 1...Unit mechanism, 1a...Locking piece, 4...Coil spring, 6.60...Rubber, 6b...Groove , 6o...Tsubabe,
60a... recess.

Claims (4)

[Claims] (1) During assembly, there is a cylindrical part to which a coil spring is attached to the outer periphery, a groove part provided above the cylindrical part into which the locking piece of the unit mechanism is inserted, and a groove part provided at the lower end of the cylinder to project outward. In the unit mechanism vibration isolating rubber having a flange portion made of a viscoelastic material as a whole, the height of the cylindrical portion is larger than the distance between the locking piece and the flange portion when assembly is completed. A vibration isolating rubber for a unit mechanism, characterized in that the collar portion is not deformed by the spring force of the coil spring when the vibration isolating rubber equipped with the coil spring is attached to the unit mechanism. (2) The height of the cylindrical portion is 1.1 to 1.
The vibration isolating rubber for a unit mechanism according to claim 1, characterized in that the vibration isolating rubber is six times as large. (3) The vibration isolating rubber for a unit mechanism according to claim 1 or 2, characterized in that a concave portion is provided on the circumferential surface of the intermediate portion of the cylindrical portion. (4) The vibration isolating rubber for a unit mechanism according to claim 1 or 2, characterized in that a plurality of holes are provided in the circumferential surface of the intermediate portion of the cylindrical portion.