JP2605694Y2 - Leaf spring holding structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leaf spring holding structure for accurately positioning small precision components such as an optical recording / reproducing apparatus without play, and more particularly to a leaf spring suitable for a small leaf spring. The present invention relates to a spring holding structure.

[0002]

2. Description of the Related Art Conventionally, when a component is semi-fixed to a holding member by a leaf spring, if the pressing force is insufficient with cantilever fixing, FIG.
As shown in (a), both ends of the leaf spring 3 are fastened to the holding member 2 by screws, and the component 1 is pressed against the holding member 2 by the elasticity of the leaf spring 3.

[0003] Such a leaf spring holding mechanism has disadvantages in that the number of parts is large and the number of assembling steps is increased.

In the conventional leaf spring holding mechanism shown in FIG. 6B, both ends of the leaf spring 3 are bent and pressed into holes provided in the holding member 2 to fix the leaf spring 3. According to this method,
There is a drawback that the load accuracy is difficult to obtain due to the lifting of the leaf spring, and the positional accuracy is also difficult to obtain.

When a plurality of parts are fixed by one leaf spring, a T-shaped leaf spring 3 is used as shown in FIG. The parts 1 and 1a are pressed at the center and the tip thereof.

In this case, the lengths of L ₂ and L ₃ shown in the drawing need a predetermined length in order to obtain the elasticity required to press the parts 1 and 1a, respectively. Then, in order to reduce the torsional deformation due to the reaction force of the force pressing the component 1a, L shown in FIG.
₁ had to be widened, making it difficult to downsize the leaf spring.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to reduce the size of a leaf spring and to provide a sufficient pressing force. It is to provide a holding structure.

[0008] Another object of the present invention is to provide a leaf spring holding structure in which the load accuracy and the position accuracy of the leaf spring can be easily obtained.

[0009]

A leaf spring holding structure according to the present invention is a leaf spring holding structure in which a leaf spring for pressing a component to a holding member is fastened or fitted to the holding member. Is provided, and a concave portion generated by cutting and raising is fitted to a convex portion provided on the holding member, and the cut and raised tongue piece is brought into contact with the convex portion, so that a gap between the cut and raised tongue piece and the convex portion is provided. The above-mentioned pressure suppresses the deformation of the leaf spring due to the pressure pressing the component.

[0010]

According to the leaf spring holding structure of the present invention, since the cut-and-raised tongue piece of the leaf spring comes into contact with the convex portion of the holding member to receive the reaction force of the component pressing, the deformation of the leaf spring is reduced. Therefore, the leaf spring shape can be reduced in size.

Further, by fitting a concave portion formed by cutting and raising of the leaf spring to a convex portion provided on the holding member, the positional accuracy of the leaf spring can be easily obtained.

[0012]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an example in which the present invention is applied to a leaf spring holding structure for holding a small lens. As shown in the figure, a T-shaped leaf spring 3 is used, and both ends of a T-shaped horizontal portion are bent, and the portion is fitted into a hole of the holding member 2. The component 1 is pressed by the tip 3a at the center of the leaf spring.

A cut-and-raised tongue 3b is provided at the base end of the component pressing portion of the leaf spring 3, and a concave portion 3c formed by the cut-and-raised portion is fitted into a convex portion 2a provided on the holding member 2. Then, the tip of the cut-and-raised tongue piece 3b is locked by the projection 2b provided on the projection 2a. In this way, the positional accuracy when the leaf spring is mounted is ensured, and the load accuracy is also increased.

FIG. 2 shows the load applied to the leaf spring. The reaction force pressing the component acts upward on the tip, and the moment generated by the reaction causes the cutting and raising tongue to rotate clockwise. The moment generated by the reaction force that presses the component is received by the contact between the cut-and-raised tongue piece and the projection of the holding member.

Therefore, the torsional deformation of the leaf spring due to the pressing force of the parts is reduced, and the leaf spring can be reduced in size.

FIG. 3 shows a modification of the leaf spring shown in FIG.
In this case, a rib is provided on the pressing portion of the leaf spring and the cut and raised tongue by bending. The ribs reinforce the deformation of the leaf spring, and the leaf spring can be further reduced in size. Further, when the leaf spring is bonded to the holding member, the groove of the rib guides the adhesive, and the bonding can be performed reliably.

In another embodiment shown in FIG. 4, the leaf spring is provided with cut and raised tongue pieces 3b on both sides of a concave portion 3c, and a pressing portion is provided corresponding to the cut and raised tongue pieces 3b and 3b. ing.
In this manner, a plurality of components can be pressed by one leaf spring.

In still another embodiment shown in FIG. 5, a part of the pressing part of the leaf spring is bent at a right angle, and the part is pressed horizontally at the part. In this way, the two-way play of the component can be eliminated by the leaf spring.

Although the embodiment is constructed as described above, the invention is not limited to this. For example, it is possible to fasten a leaf spring to the holding member with a screw, and to arrange a plurality of pressing portions side by side. It is possible. That is, the pressing portion and the concave portion have a one-to-one correspondence.
It is not necessary to correspond to.

[0020]

According to the leaf spring holding structure of the present invention, the leaf spring can be accurately positioned by fitting the concave portion of the leaf spring and the convex portion of the holding member. The leaf spring can be prevented from falling off by engaging the cut-and-raised tongue piece with the projection of the holding member.

Further, the torsion deformation of the leaf spring is prevented by the contact between the cut and raised tongue piece of the leaf spring and the projection of the holding member.
The leaf spring can be reduced in size and can be made thin.

As described above, when the leaf spring has a thin structure,
The load on the mold is reduced, the dimensional accuracy of the leaf spring is improved,
In addition, the life of the mold is prolonged.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a leaf spring holding structure according to an embodiment of the present invention.

FIG. 2 is a side view showing a load state in the leaf spring holding structure.

FIG. 3 is a perspective view showing a modification of the leaf spring of the embodiment.

FIG. 4 is a perspective view showing a leaf spring holding structure according to another embodiment of the present invention.

FIG. 5 (a) is a perspective view showing a leaf spring in a leaf spring holding structure according to still another embodiment of the present invention, and FIG.
(B) is a side view which shows the same Example.

6A is a perspective view showing an example of a conventional leaf spring holding structure, FIG. 6B is a perspective view showing another example of a conventional leaf spring holding structure, and FIG. FIG. 10 is a perspective view showing still another example of the conventional leaf spring holding structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Component 2 Holding member 3 Leaf spring

Claims (1)

(57) [Scope of request for utility model registration] 1. A leaf spring holding structure in which a leaf spring for pressing a component against a holding member is fastened or fitted to the holding member, a cut-and-raised tongue is provided on the leaf spring, and the recess formed by the cut and raised is held. By fitting the cut-and-raised tongue piece into the convex part and fitting the cut-and-raised tongue piece to the convex part, the pressure between the cut-and-raised tongue piece and the convex part causes the part of the leaf spring to be pressed. A leaf spring holding structure configured to suppress deformation.