JP3446860B2 - Leaf spring and lock receiving device using the same - 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 which is sandwiched between objects and exerts an elastic force in a direction away from the objects, and a lock receiving device using the leaf spring. . The latter lock piece receiving device is a lock piece receiving device that is attached to a door frame and locks a lock piece such as a latch bolt or a dead bolt. It is a lock receiving device whose position can be adjusted.

[0002]

2. Description of the Related Art Conventionally, as a leaf spring of this kind, a leaf spring which is simply bent into an arc shape is used.

Further, a lock piece receiving device has been conventionally provided in which a receiving device is slidably accommodated in a mounting box and the receiving device is biased in one direction by a spring, which is disclosed in Japanese Patent Laid-Open No. 7-224557.
Various proposals have been proposed, such as No. 8/238, Kaihei 8-238, 3-29495, and 6-100053.

[0004]

Generally, when a plate material is bent and deformed, the length of the center line of the plate thickness does not change, but the outside of the center line expands and contracts inside, and the force corresponding to the amount of expansion and contraction. Even with the same bending deformation, the larger the wall thickness, the larger the amount of expansion and contraction, and the larger the force generated. Further, spring steel has a property (plasticity) that returns to its original value when the external force is removed within the elastic limit, but does not return to its original value when the strain increases further. Therefore, when the same material (with the same elastic limit) and the same shape of leaf spring are similarly deformed, the thicker plate material has a larger expansion / contraction amount (strain amount).
The elastic limit is reached quickly and it cannot be restored.

In the above-mentioned conventional example, when the dimension between the objects is greatly changed, if the leaf spring is thin, the amount of expansion and contraction (strain amount) is small and it is difficult to reach the elastic limit, and the original state is restored. Although it is easy to return, there is a problem that it is difficult to obtain a large force. With a thick leaf spring, a large force can be obtained, but the expansion and contraction amount (distortion amount) is large and it is easy to reach the elastic limit, There is a problem that it will not return to the state.

When a force within a certain range is generated within a certain movable range within the elastic limit, a leaf spring having a large wall thickness and a long length is used to reduce the amount of deformation (comparable to the entire length of the movable range. And a relatively short leaf spring with a relatively small wall thickness and a large amount of deformation (the movable range becomes larger than the entire length). In the case of the former method, the amount of deformation is small, so even if it is repeatedly used, the plate material has the advantage of being less fatigued and rich in durability, but since the whole is large, it requires a large space to accommodate this plate spring. There is a problem that it ends up. In the case of the latter method, since the overall size is relatively small, there is an advantage that it does not require a large space to accommodate, and it can be accommodated in a small space, but since the deformation amount is large, the plate material easily fatigues if used repeatedly. However, there is a problem that it cannot withstand long-term use.

The present invention provides a leaf spring which generates a force within a certain range within a certain movable range within an elastic limit, can be accommodated in a small space, and can withstand repeated use over a long period of time. Was made as an issue.

Further, in the lock piece receiving device as described above, when the receiving device is slid and adjusted, the receiving device is slid even when the biasing force of the spring changes and becomes small, or when the receiving device is in use. Sufficient force must be applied to prevent movement or the like. Moreover, since it is not necessary to increase the size of the entire lock piece receiving device, it is desirable that this function can be realized in a space as small as possible. That is, it is another object of the present invention to provide a spring used in the lock receiving device that can be accommodated in a small space and exert a sufficient force.

[0009]

Means for Solving the Problems In order to solve the problems of the above-mentioned conventional example, the present invention provides a rectangle in claim 1.
Cut the plate material and leave the connecting plate in the center, and set up standing plates on both sides of the plate.The standing plates on both sides stand diagonally inward from the same side at the opposite ends of the plate and look from the front. 3 is a leaf spring characterized by being crossed with each other, wherein the receiving device is slidably housed in the mounting box, and the receiving device is biased in one direction by the spring. In the device, the spring comprises a leaf spring according to claim 1.

[0010]

The leaf spring of the present invention is constructed as described above, and when a force acts, both the standing plates are deformed and the connecting plate is also deformed. That is, not only the upright plate but also the connecting plate is deformed, so that the expansion / contraction amount (distortion amount) inside and outside the center line of the plate material becomes small.

[0011]

EXAMPLE A leaf spring S is obtained by cutting a rectangular plate material as shown in FIG. 4 as shown by a dotted line and leaving a connecting plate 1 at the center.
The standing plates 2.2 are raised obliquely upward from both ends thereof and crossed as seen from the front as shown in FIG. As shown in FIG. 4, the yield is good when manufactured from a rectangular plate material.

As shown in FIG. 3, when the leaf spring S of the present invention is sandwiched between two objects and a force is applied, the standing plates 2 and 2 are tilted downward and deformed, and the connecting plate 1 also rises from both ends. It transforms into an arc.

The lock receiving device includes a mounting box 3 embedded in a door frame, a receiver 4 slidably accommodated in the mounting box 3, an inner surface of a side wall of the mounting box 3 and an outer surface of a side wall of the receiver 4. The leaf spring S is housed between the two and the surface plate 5 attached to the surface of the mounting box 3. The above is the configuration of the main part of the lock piece receiving device of the present invention, and the mechanism for sliding the receiving tool 4 and the like are omitted, but the lock piece receiving device like the conventional example described in the Related Art 0003. Applied to.

[0014]

As described above, according to the present invention, when a force is applied, not only the standing plate but also the connecting plate is deformed, so that the expansion / contraction amount (strain amount) inside and outside the center line of the plate material becomes small. Even if the thickness of the plate material is increased, it is difficult to reach the elastic limit, a large force can be obtained, and there is an effect that it does not easily return to the original state.

Further, there is an effect that it can be accommodated in a small space and can withstand repeated use over a long period of time.

Further, in the lock receiving device, since the leaf spring urging the receiving device can be housed in a small space, the entire device can be manufactured compactly, and it is necessary and sufficient. It has the effect of gaining strength and withstanding long-term use.

[Brief description of drawings]

FIG. 1 is a perspective view of a leaf spring.

FIG. 2 is a front view of a leaf spring.

FIG. 3 is a front view of a state where a leaf spring is sandwiched between two objects and deformed.

FIG. 4 is a plan view of a plate material before making a leaf spring.

FIG. 5 is a cross sectional view of the lock piece receiving device.

FIG. 6 is a front view in which the surface plate is removed and the receiver is shown in section.

[Explanation of symbols]

S leaf spring 1 connecting plate 2 Standing board 3 mounting boxes 4 receiver

Claims (2)

(57) [Claims] 1. A rectangular plate material is cut, and a standing plate is provided on both sides of the plate, leaving a connecting plate at the center, and the standing plates on both sides are directed diagonally inward from the same surface side of opposite ends of the plate material. A leaf spring characterized by standing upright and intersecting when viewed from the front. 2. A leaf spring according to claim 1 in a lock piece receiving device in which a receiver is slidably accommodated in a mounting box and the receiver is biased in one direction by a spring. A lock piece receiving device characterized by the above.