JP4548811B2 - Attaching structure of the pin for jewelry - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an attachment pin mounting structure in which a base end portion of a pin is rotatably attached to an end portion of a decorative body such as a breaker type earring or a broach.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a pin attachment structure for this type of accessory, for example, a pin attachment structure for a circuit breaker type earring as shown in FIG. 7 is known. As shown in the figure, this pin mounting structure is formed by forming a U-shaped bearing portion 21 at one end portion of a decorative body (not shown) and forming the base end portion 23 of the pin 22 in a flat plate shape. The base end portion 23 is inserted between the bearing portions 21 of the decorative body, and the support shaft 26 is inserted into the bearing hole 24 formed in the bearing portion 21 and the insertion hole 25 provided in the base end portion 23, thereby supporting the support shaft. The pin 22 is rotatably supported by crimping both ends of the bearing 26 around the bearing hole 24. Note that a U-shaped sandwiching portion that sandwiches the tip of the pin 22 is provided at the other end of the decorative body.
[0003]
[Problems to be solved by the invention]
However, the bearing structure of the pin 22 has the following problems.
a) Since a small caulking pin is used as the support shaft 26, the holding method is difficult at the time of manufacture and the work is complicated.
b) Depending on the caulking method of the caulking pin, the pin may easily come off.
c) Since three parts including caulking pins are used, the assembling method is difficult and much time is required for manufacturing.
d) In some cases, the caulking pin is bent at the time of caulking, and a product that is not a product may be produced.
e) The presence of caulking pins has deteriorated the quality of jewelry, jewelry, etc. that emphasize appearance.
f) Since the caulking portion is held with tweezers or the like during brazing, the caulking pin is obstructive, and brazing has been forced in an unstable state.
g) When the product was polished, the caulking pin was polished and dropped off, or the plate around the caulking pin was crushed and the pin could not move.
[0004]
Therefore, the present invention is an accessory for jewelry that is excellent in workability at the time of manufacture without the need for a caulking pin, has high pressure resistance, is highly durable, and can provide high-quality jewelry and jewelry by eliminating the appearance defects due to the caulking pin. The purpose is to provide a pin mounting structure.
[0005]
[Means for Solving the Problems]
In other words, the accessory pin mounting structure of the present invention is the accessory pin mounting structure in which the base end portion of the pin is rotatably attached to the end portion of the decorative body, and the base of the pin is attached to the end portion of the decorative body. An end bearing portion is provided, and the bearing portion is composed of a pair of support plates and a protrusion formed on the opposite surface of the support plate, and a shaft hole provided at the base end portion of the pin is fitted into the protrusion. In addition, the butted portion of the protruding portion is joined by laser welding.
[0006]
The attachment structure for a jewelry accessory pin according to the present invention is characterized in that the protrusion formed on the opposing surface of the support plate is formed by pressing.
[0007]
The attachment structure for a jewelry accessory pin according to the present invention is characterized in that the laser welding is performed by a pulse laser while minimizing the melting range of the material.
[0008]
According to the present invention, an accessory that is excellent in workability at the time of manufacture without the need for a caulking pin, has a high pressure resistance, is highly durable, and can solve the appearance defect due to the caulking pin and can provide high-quality jewelry and accessories. It has become possible to provide a mounting structure for a pin.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a mounting structure for a jewelry accessory pin according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 to FIG. 5 illustrate an example of a pin attachment structure of a circuit breaker type earring as a pin attachment structure according to the present invention. FIG. 1 is a perspective view in an exploded state thereof, and FIG. 3A is a developed view of the bearing portion, FIG. 4B is a sectional view thereof, FIG. 4 is a perspective view of the bearing portion processed into a predetermined shape, and FIGS. (C) is a principal part sectional view of an assembly part, respectively, and FIG. 6 is a perspective view showing a use state of a jig at the time of laser irradiation.
[0010]
That is, as shown in FIGS. 1 and 2, a U-shaped bearing portion 1 is fixed to an end portion of a decorative body (not shown). The bearing portion 1 is composed of a pair of support plates 2 on the left and right and a protruding portion 3 formed on the opposing surface of the support plate 2. Then, an insertion hole (shaft hole) 6 opened in the base end portion 5 of the pin 4 formed in a round bar shape is attached to the protrusion portion 3 with the protrusion portion 3 as a support shaft, and the pin 4 is rotatably held. It is. The base end portion 5 of the pin 4 formed in the shape of the round bar is formed so as to ensure strength by pressing the round bar into a flat plate shape, and the pin 4 is formed on the base end portion 5 of the flat plate shape. The insertion hole 6 penetrating the surface of the base end portion 5 is opened on the axis.
[0011]
The bearing portion 1 is formed by a method as shown in FIGS. That is, as shown in FIGS. 3A and 3B, the bearing portion 1 is formed using a noble metal plate 11 made of gold, platinum or the like. The plate member 11 is provided with shaft forming portions 12 and 13 on both sides thereof, and is connected by a connecting portion 14 therebetween. Reference numeral 15 denotes a punched portion formed by press working on each of the shaft forming portions 12 and 13. The punched portion 15 can be protruded from the back surface of the plate member 11 so that the outer edge portion of the stamped portion 11 remains with a predetermined thickness, so that the punched portion 15 having substantially the same contour is projected to the front surface side.
[0012]
As shown in FIG. 4, the plate member 11 is bent at the connecting portion 14 so that the shaft forming portions 12 and 13 are opposed to each other, thereby forming a pair of support plates 2. The projecting portion 15 formed on the shaft forming portions 12 and 13 is used as the projecting portion 3, and the projecting portion 3 is fitted into the projecting portion 3 with the insertion hole 6 provided in the base end portion 5 as described above. As a result, the pin 4 is rotatably held.
[0013]
The butting surfaces of the protrusions 3 are joined by laser welding. That is, a laser beam is irradiated from the back side of the abutting surface of the protrusion 3 by a YAG laser, and the abutting surface is welded. The laser used for welding is a YAG laser pulse laser, which can instantaneously give energy to the material. Therefore, it was possible to perform welding while minimizing the thermal influence on the area other than the welded portion.
[0014]
The laser irradiation angle is preferably perpendicular to the irradiation surface which is the back side of the butting surface of the protrusion 3. As an example of irradiation conditions with K18 material, the laser beam irradiation diameter is about φ0.1 to φ0.15 mm, the laser irradiation output is around 2j (joules), and the pulse width is 1/1000 second. Was the most suitable. Further, the welded state is formed as shown in FIG. 5B by irradiating a laser beam in the state of FIG. 5A, and is firmly welded without impairing the functionality. That is, the protrusion 3 completely welded by laser irradiation is slightly thinner than the original diameter because the molten metal ejection phenomenon and the gap between the contact portions are eliminated. However, since the original part sufficient to move the pin remains in the part close to the support plate 2, there is no problem in practical use. In addition, the surface directly irradiated with the laser beam is somewhat depressed and has ripple marks, but cannot be easily confirmed with the naked eye. Note that, by improving the accuracy of the contact portion in the protrusion 3 and adjusting the laser irradiation conditions, welding that does not dissolve the protrusion 3 as much as shown in FIG. 5C is possible. Considering the surface, a welded state as shown in FIG. In addition, in the case of an alloy containing a component that easily oxidizes the precious metal used, the surface may oxidize and darken during welding, but by creating an atmosphere of an inert gas such as nitrogen gas or argon gas, Oxidation can be stopped. The above condition is that the material is K18, the diameter of the butt surface is φ0.65 mm, the thickness is 0.3 mm on one side, and the conditions are different if the material is different or the butt surface dimensions and thickness are different. Must be set. The use state of the jig at the time of laser irradiation is shown in FIG. That is, the pressing jig 21 that pressurizes the support plate 2 is fixed in that state when the protruding portion 3 comes into contact, and does not need to be pushed more than necessary. That is, if it is pressed more than necessary, the welding location may be greatly deformed during welding.
[0015]
In the above embodiment, the pin mounting structure of the circuit breaker type earring is explained as an example. However, not only the earring but also other types of earrings and brooches have the same pin mounting structure. The present invention can be applied if it exists. Further, the material of the pin and the bearing portion is not limited to the above-mentioned noble metal.
[0016]
【The invention's effect】
As described above, according to the present invention, a caulking pin is not required, the workability at the time of manufacture is excellent, a high pressure resistance, a high durability, and the appearance defects due to the caulking pin are eliminated, thereby providing high-quality jewelry and accessories. It is now possible to provide an attachment pin mounting structure that can be used. Details are shown below.
(A) Since the number of parts is small compared to the conventional example, the manufacturing cost and the total cost of a single part can be reduced.
(B) Conventionally, the portion where the caulking pin has been used is integrated with the support plate portion and is welded by a laser beam, so that there is no possibility that the pin will be lost.
(C) Since there is no caulking pin, the appearance is very neat and does not give the decorative body a sense of incongruity.
(D) Since the number of parts is small and there are no small parts such as caulking pins, automation is easy.
(E) A stable product can be made without being affected by the hardness of the material used.
(F) Since the laser beam can be numerically controlled, it is simple and does not require a skilled worker.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an embodiment of an attachment pin mounting structure according to the present invention.
FIG. 2 is a plan view of the assembled state.
3A is a development view of a bearing portion, and FIG. 3B is a cross-sectional view thereof.
FIG. 4 is a perspective view of a state in which a bearing portion is processed into a predetermined shape.
FIGS. 5A to 5C are cross-sectional views of the main part of the assembly portion.
FIG. 6 is a perspective view showing a use state of a jig during laser irradiation.
FIG. 7 is an exploded perspective view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bearing part 2 Support plate 3 Protrusion part 4 Pin 5 Base end part 6 Insertion hole 11 Plate material 12, 13 Axis formation part 14 Connection part 15 Launching part 16 Melting part 21 Holding jig

Claims (3)

In the attachment structure of the pin for jewelry, in which the base end portion of the pin is rotatably attached to the end portion of the decorative body, the bearing portion of the base end portion of the pin is provided at the end portion of the decorative body, and the bearing portion is It is composed of a pair of support plates and a protrusion formed on the opposite surface of the support plate. The shaft hole provided in the base end portion of the pin is fitted into this protrusion and the butt portion of the protrusion is joined by laser welding. The attachment structure of the pin for jewelry characterized by the above-mentioned. The attachment structure of the pin for jewelry of Claim 1 with which the protrusion part formed in the opposing surface of a support plate was formed by press work. The attachment structure of the pin for jewelry of Claim 1 or 2 which performed laser welding, suppressing the melt | dissolution range of a raw material to the minimum with a pulse laser.

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