JPH09215510A - Locking body for necklace chain and method of combining locking body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a locking body with small diameter which can wear or detach a necklace chain easily. SOLUTION: A locking body is composed of an upper half-divided body 1, a lower half-divided body 2, a shaft 3, and a spring 4. When depressing a press part 5 of the upper half-divided body 1 in opposition to the spring 4, a hole 8 is made widely opened to facilitate a locking part (b) of a necklace chain (c) to insert. After insertion, when canceling the depression and pulling out the necklace chain lightly, an end part of the locking part (b) is contacted with the inner end surface of the locking body, causing the necklace chain to be prevented from coming off. Other locking part (a) is kept to be locked. When the press part 5 is made to be depressed to open it and pull out the locking part (b), the necklace chain can be removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking body for a necklace chain.

[0002]

2. Description of the Related Art Necklace chains of precious metals, metals, etc. have been conventionally used as ornaments. However, in general, these necklace chains have a small diameter, and when they are attached to the neck, it is common to put both hands around the back of the neck when connecting the ends. However, wearing a necklace chain is often difficult and often requires the help of another person. The main reason for this is that the connecting part (hereinafter referred to as the locking body) for mounting the necklace chain is composed of rings at both ends of the necklace chain, and one ring has a movable part. Thus, the notch is temporarily formed to join the other ring. Further, there is also one in which a movable hook portion is provided on one side and is coupled to the other ring regardless of the ring.

[0003]

The necklace chain having the movable portion at the connecting portion has a difficulty in manufacturing because the small ring is provided with the movable portion. Further, there is a necklace chain in which a hook portion at one end is attached to a hole portion at the other end, but this also makes the attachment difficult. Also, although the rings and hooks used conventionally are made small to correspond to the diameter of the necklace chain, it is still considerably larger than the diameter of the chain,
As a result, the appearance of the whole necklace chain is not good,
There was a problem that the design was limited. Also, in some women's necklace chains, the chain body has a fairly small diameter, and in that case the locking body used for the connection part is required to have a certain thinness, It was difficult to manufacture such a lock. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a locking body that is easy to mount and has a good design even for a necklace chain having a small diameter, and a manufacturing method thereof.

[0004]

In order to solve the above-mentioned problems, the invention according to claim 1 has a hole for engaging an end of a necklace chain at both ends by an upper half body and a lower half body. The upper half body is formed so as to be rotatably connected to the lower half body around an axis and serves as a locking body of a necklace chain having a spring interposed therebetween. In the locking body of the necklace chain of the invention of claim 2, the upper half body is
It is characterized in that a cylindrical portion is formed at its end.
According to the necklace chain locking body of the invention of claim 3, in the invention of claim 1 or 2, the necklace chain is locked in the hole formed by the upper half body and the lower half body. It is characterized by that. In the necklace chain locking body of the fourth aspect of the invention, the upper half body has a pressing portion having a hole portion. In the locking body of the necklace chain according to the invention of claim 5, when the pressing portion of the upper half-divided body is pressed, one hole of the locking body is further opened, and the locking portion of the necklace chain is It is characterized in that it can be inserted and the locking portion can be locked with the inner surface of the end of the locking body when the pressing is released. In the locking body of the necklace chain of the invention of claim 6, when the pressing portion of the upper half-divided body is pressed, one hole of the locking body is further opened, and the locking portion of the necklace chain is The feature is that it can be removed. The invention of claim 7 is the necklace chain.
Fixing the locking part to one end of the lower half-split body, inserting the other end from the cylindrical part of the lower half-split body, and then fixing the locking part. The present invention relates to a method of connecting an engaging portion to a necklace chain, which comprises a step of interposing a spring between the upper engaging protrusions and connecting the upper engaging portion and the lower engaging portion and fixing them by a shaft. According to the invention having the above characteristics, by pressing the pressing portion of the upper half-split body, the hole is further opened to facilitate the insertion of the locking portion of the necklace chain, and after the insertion, the locking portion is locked to the inner end surface of the opening. The necklace chain is locked and attached by engaging with the parts. Further, if the pressing portion is pressed and opened, the chain end can be removed.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIGS. 1 to 5, an engagement body of a necklace chain according to the present invention connects an upper half-divided body 1 and a lower half-divided body 2 with a shaft 3 and between them. The spring 4 is interposed. As can be seen in particular from FIGS. 1 and 5, the upper half-split body 1 is provided with an upper engaging portion 12 having an engaging convex portion 13 in the center of the upper concave portion 11, and the engaging convex portion 13 is also provided with an upper engaging portion 12. Has a hole 14 into which the shaft 3 is inserted. Further, an upper locking protrusion 14 of the spring 4 is provided.

The lower half-divided body 2 is provided with a cylindrical portion 21 in a part thereof, and an engaging concave portion 24 and a hole 25 are provided in a central portion of the lower concave portion 22.
The lower engaging portion 23 having the is accommodated in the lower concave portion 22. The lower engagement portion 23 may be formed integrally with the lower half body 2. There is also provided a hole 26 into which the shaft 3 is inserted when the lower half 2 is assembled with the upper half 1, which is aligned with the hole 24. Further, a lower locking protrusion 27 of the spring 4 is provided.

The upper half body 1 and the lower half body 2 are
As shown in FIG. 5, the shaft 3 and the spring 4 are used to assemble (a ') onto (b) so as to form an integral locking body having holes 7 and 8 at both ends. As is clear from the cross-sectional view of FIG. 4, the upper half body 1 is provided with the pressing portion 5, and when the pressing portion 5 is pressed, it rotates around the shaft 3,
Since the upper locking projection 5 presses the spring 4, the hole 8 at the end of the upper half body is further opened. The pressing portion 5 has a keyhole pattern as shown in FIG. 1, which allows the nail portion of the hand to be inserted when the necklace chain is attached, thereby facilitating attachment or detachment. However, the opening does not have to be a keyhole pattern, or the opening may not be provided at all.

The necklace chain C is provided with locking portions a and b which engage with the ends thereof, as shown in FIG. The locking portions a and b are formed of a hollow body or a cylindrical body having a bottom so as to cover the end portion of the necklace chain, and are engaged and crimped so as to cover the end portion of the necklace chain. Next, the assembly of the necklace chain with the locking body will be described.
The neck portion of the necklace chain is formed by caulking the engaging portion a (may be b), and the end portion of the necklace chain without the engaging portion a is bored from the cylindrical portion 21 of the lower half body 2. 7
Insert the necklace chain through (Fig. 6),
The locking portion a stops when the inside 7i of the hole 7 and the large diameter portion thereof abut against each other. Then, the spring 4 is sandwiched between the lower locking projection 27 and the upper locking projection 15 of the lower half body 2 to cover the lower half body 2 with the upper half body 1 and the holes 14, 25. , 26, the shaft 3 is passed through the notches 16 and fixed. Next, the necklace chain
The locking portion b (may be a) is caulked to the other end of the connector to fix it. At this stage, the necklace chain is ready for use for use.

Next, the mounting of the necklace chain will be described. Position the tip of the index finger on the pressing part 5 of the locking body of the necklace chain that is ready to be mounted, and pinch the locking part b at the other end of the necklace chain with your finger to locate it behind the neck. Let (Depending on the decoration of the necklace chain, it may be in front of the neck.). Therefore, the pressing portion 5 is pressed to open the hole 8 (FIG. 6), and the locking portion b is inserted into the hole 8. After the insertion, the pressing of the pressing portion 5 of the locking body is stopped, the opening of the hole 8 is closed, and the necklace chain C is lightly pulled so that the large diameter portion of the locking portion b abuts the inner end 8i of the hole 8. , The necklace chain cannot be removed any more. Both locking parts a and b of the necklace chain have a clearance (play) inside the locking body so that they can move inside the locking body (FIG. 7).

Next, when the chain is dismounted, the pressing portion 5 of the locking body is pressed to lock the locking portion b of the necklace chain.
Just pull out.

As the material of the necklace chain, the locking body and the locking portion, a conventionally used noble metal such as gold or silver, or a material obtained by plating another material with gold is appropriately used.
Further, in this embodiment, the diameter of the necklace chain is 1.5 mm and the diameter of the locking body is about 3 mm, but the numerical values can be freely selected by those skilled in the art together with the diameter of the necklace chain. is there.

[0012]

According to the present invention, the necklace chain can be easily attached and detached, and the diameter of the attachment portion can be made close to the diameter of the necklace chain, resulting in loss of the attachment performance. Without it, you can get a necklace chain with excellent design.

[Brief description of drawings]

FIG. 1 shows a plan view (a) and a right side view (b) of a locking body of the present invention.

FIG. 2 shows a front view (a) and a left side view (b) of the locking body of the present invention.

FIG. 3 is a schematic cross-sectional view of the locking body of FIG. 1 as viewed along the line AA and perpendicular to the paper surface.

FIG. 4 is a diagram showing a state in which a pressing portion 5 is pressed in FIG.

FIG. 5 is a perspective view of each component of the locking body,
(A) is a perspective view of the back surface of the upper half-divided body 1, which is rotated 180 degrees as indicated by an arrow (a ') and overlapped with (b), (c).
It is a figure which shows assembling like.

FIG. 6 is an explanatory diagram when the necklace chain is attached to the locking body.

FIG. 7 is a view showing that the necklace chain is attached to the locking body.

FIG. 8 is a view showing a locking portion at an end portion of a necklace chain.

[Explanation of Codes] A ... Locking body, 1 ... Upper half-split body, 2 ... Lower half-split body, 3 ... Shaft, 4 ... Spring, C ... Necklace chain Locking part

Claims (7)

[Claims] 1. A hole for engaging an end portion of a necklace chain is formed at both ends of the upper half body and the lower half body, and the upper half body rotates around an axis with respect to the lower half body. Necklace chain locking body that is rotatably connected to and has a spring interposed between the two. 2. The locking body for a necklace chain according to claim 1, wherein the upper half body has a cylindrical portion formed at an end thereof. 3. The necklace chain according to claim 1 or 2, wherein a necklace chain is locked in a hole formed by the upper half body and the lower half body.
Locking body. 4. The necklace chain according to claim 1, wherein the upper half body has a pressing portion having a hole portion.
Locking body. 5. When the pressing portion of the upper half-split body is pressed, one hole of the locking body is further opened so that the locking portion of the necklace chain can be inserted. The locking body of the necklace chain according to claim 2, wherein the stopper is capable of locking with the inner surface of the end of the locking body. 6. When the pressing portion of the upper half-split body is pressed, one hole portion of the locking body is further opened, and the locking portion of the necklace chain can be removed. Item 2. A locking body of the necklace chain according to item 2. 7. A step of fixing a locking part to one end of a necklace chain, and fixing the locking part after inserting the other end from a cylindrical part of the lower half-split body, and a lower locking of the lower half-split body. A spring is interposed between the projecting projection and the upper locking projection of the upper half, and the upper engaging portion and the lower engaging portion are coupled and fixed by a shaft. How to connect the stopper.