JP2014023565A - Stopper for accessory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stopper for accessories, holding the connection state not to be unfasten carelessly in the case of connection, and also facilitating the connecting and detaching operation.SOLUTION: The inner peripheral surface of an insert recessed part 7 of a first connected body 1 is provided with a plurality of spiral projecting parts 8, and each of the spiral projecting parts 8 includes a latch face 8c constituting a latch recessed part 7c in combination with a bottom face 7a of the insert recessed part 7; and a guide face 8a connected toward an adjacent latch recessed part 7c. An insert part 10 of a second connected body 2 is provided with a latch projecting part 11 on the outer periphery, which can move along the guide face 8a and enter the latch recessed part 7c. The latch face 8c is formed by a flat surface substantially orthogonal to the axis of the insert recessed part, and the rear end in the direction of inserting the latch projecting part 11 is provided with a locking face 11b formed by a flat surface confronting with the latch face 8c in the latch recessed part 7.

Description

  The present invention relates to a fastener for jewelry used for a necklace or a bracelet.

  There are fasteners for jewelry that use magnetic force. For example, a connection body attached to one end of a necklace or bracelet is provided with a permanent magnet, and a connection body attached to the other is provided with a permanent magnet or a magnetic body so that both are joined by magnetic force. In this way, when attaching a necklace to a fastener that is coupled by magnetic force, it is only necessary to match the joint surfaces, so that detailed work such as moving the ring member against the spring force is not required, as with pulling rings. It is. Therefore, it is easy to connect the necklace by turning the hand behind the neck or connecting the bracelet with one hand.

However, as described above, the one that connects both connected bodies with only the magnetic attraction force, the harder it is to remove the stopper in the missing state, the stronger the magnetic force, the greater the pull when removing it. There is a problem that power is needed.
Therefore, there are some devices in which the shape of the connecting body is devised in various ways so that it does not easily come off when a tensile force is applied even if the magnetic force is not so strong.

For example, in the stopper shown in Patent Document 1, the insertion part of the other coupling body is inserted into the insertion recess formed in one coupling body, and both coupling bodies are joined. Forms a linear retaining groove along the circumference, and a projection having a circular cross section is provided on the outer periphery of the insertion portion of the other coupling body. The projection is inserted into the retaining groove to complete the connection.
Further, a linear introduction groove having a direction different from that of the retaining groove is provided on the inner periphery of the insertion recess in order to guide the protrusion from the opening side to the retaining groove.

JP 2002-125730 A

In the conventional stopper, when the introduction groove is a linear groove parallel to the axis of the insertion recess, when the coupling body is coupled, the projection is inserted into the introduction groove and pushed to the bottom, and thereafter In addition, it is necessary to perform an operation of rotating both the connecting members relative to each other and pushing the protrusion into the retaining groove. On the other hand, when releasing the connection, a pulling operation is required after the rotating operation.
Further, when the introduction groove is inclined with respect to the axis of the insertion recess and the angle formed by the introduction groove and the retaining groove is an acute angle (see Patent Document 1 (FIG. 3)), the protrusion is introduced. The direction of rotation is opposite when inserted into the groove and when inserted into the retaining groove. In other words, the rotating direction of the connecting body must be reversed halfway during both connection and removal.
In this way, two-stage operation is necessary, and the connecting and removing operations are troublesome.

On the other hand, it is also conceivable that the protrusion is guided from the introduction groove to the retention groove by rotation in one direction with the inclination of the introduction groove and the inclination of the retention groove being the same direction. However, when the introduction groove and the retaining groove are continued along the same rotational direction in this way, both the linear grooves form an obtuse angle at the connecting portion. In this way, when the connecting portion between the retaining groove and the introducing groove is obtuse, the protrusion can easily move from the retaining groove to the introducing groove by a slight movement by rotation, and as a result, the stopper is simple. It will come off.
On the other hand, the protrusion is not easily removed from the retaining groove by forming a retaining projection near the opening of the retaining groove or lengthening the retaining groove. However, this requires time and effort for connection and removal operations.

  An object of the present invention is to provide a fastener for a jewelry that is kept in a connected state at the time of connection and does not come off carelessly and that can be easily connected and detached.

  The present invention comprises first and second coupling bodies, wherein at least one of the first and second coupling bodies is provided with a permanent magnet, and the other is provided with a permanent magnet or a magnetic member, and the first The coupling body includes an insertion recess provided with the permanent magnet or the magnetic member on the bottom surface, and the second coupling body can be inserted into the insertion recess, and the insertion section provided with the permanent magnet or the magnetic member at the tip thereof. As a premise for a fastener for a jewelry having a configuration in which an attractive force due to the magnetic force of the permanent magnet acts between the first and second connected bodies in a connected state in which the insertion portion is inserted into the insertion recess. To do.

  1st invention presupposes the said stop, and while providing a some helical convex part in the internal peripheral surface of the insertion recessed part of a said 1st coupling body, each said helical convex part is a bottom face of the said insertion recessed part. A retaining surface that forms a retaining recess together with the bottom surface, and a guide surface that continues from the opening of the insertion recess toward the retaining recess that is formed by an adjacent spiral convex portion, The insertion portion of the second coupling body includes a retaining projection that moves along the guide surface of the spiral projection on the outer periphery thereof and can enter the retaining recess. The retaining surface provided is a plane that is substantially perpendicular to the axis of the insertion recess, which is the insertion direction of the insertion portion, and the retaining projection provided on the insertion portion is at the rear end in the insertion direction of the insertion recess. , Facing the retaining surface in the retaining recess Characterized by comprising a locking surface consisting of a plane.

  The second invention is characterized in that the retaining projection has a curved surface in the insertion direction to the insertion recess.

  The third invention is characterized in that the dimension of the retaining projection in the insertion direction is substantially equal to the length of the retaining recess in the insertion direction of the insertion section.

  According to a fourth aspect of the present invention, the spiral convex portion includes a peak portion having a sharp cross-sectional shape at the rear end in the insertion direction of the second connector, which is the guide surface.

  The fifth invention is characterized in that the number of the spiral convex portions and the retaining convex portions is three.

According to this invention, both can be easily connected by rotating the 1st, 2nd connection body in a fixed direction relatively. When the insertion part and the insertion concave part of both the coupling bodies are brought close to each other, they are attracted to each other by the attractive force of the permanent magnet, and the retaining convex part of the insertion part is guided into the retaining concave part along the guide surface.
When the retaining projection is positioned in the retaining recess, the engagement surface and the retaining surface face each other, so that when the tensile force in the axial direction is applied, the engaging surface contacts the retaining surface. Contact to prevent axial movement. In addition, since the retaining surface is made of a plane substantially perpendicular to the axial direction of the insertion recess, no component force in the rotational direction is generated from the tensile force in the axial direction. It does not rotate and escape from the retaining recess.

When releasing the connection, rotate the retaining projection a little, and if the engagement surface comes off the retaining surface, the retaining projection moves along the guide surface to the exit side of the insertion recess, Easy to remove.
Therefore, the fastener for jewelry according to the present invention can be easily connected by the magnetic force and the guide surface of the spiral convex portion, and when removed, both the connected bodies can be easily removed by the action of the guide surface. Can do.
Further, even when an axial tensile force is applied during connection, the first and second connected bodies are not easily detached.

  In the second invention, since the tip of the retaining projection is curved, the leading end of the retaining projection is slidable with respect to the guide surface during the connecting operation, and the retaining projection is made smoother by the magnetic attraction force. Guided into the retaining recess.

  According to the third aspect of the invention, the retaining projection does not rattle within the retaining recess. Therefore, a connected state can be maintained more reliably and it can prevent that a connection body removes carelessly.

  According to the fourth invention, when the first and second coupling bodies are coupled, the retaining convex portion of the insertion portion is easily guided to the guide surface of the spiral convex portion, and can be smoothly coupled.

According to the fifth invention, the triple thread is formed by the spiral convex part in the insertion concave part, and the amount of movement in the axial direction can be increased with a small amount of rotation compared to the single thread or the double thread. . According to the present invention, since the amount of movement in the axial direction can be increased only by slightly rotating, connection and removal can be easily performed.
Further, if the number of the spiral convex portions is further increased, the processing in the insertion concave portion becomes complicated and the weight increases, so that the number of the spiral convex portions is three.

FIG. 1 is an external perspective view of an embodiment of the present invention. FIG. 2 is a perspective view of the first connector of the embodiment. FIG. 3 is a perspective view of the second connector of the embodiment. FIG. 4 is a cross-sectional view of the embodiment. FIG. 5 is a schematic view showing a state where the insertion concave portion of the embodiment is developed. FIG. 6 is a schematic view for explaining a process in which the retaining projection is inserted into the retaining recess. FIG. 7 is a schematic diagram for explaining a process in which the retaining convex portion is inserted into the retaining concave portion after contacting the peak portion of the spiral convex portion.

  The embodiment of the present invention shown in FIGS. 1 to 7 is a fastener for a jewelry comprising a first connecting body 1 and a second connecting body 2 that are elliptical rotating bodies in a connected state. Both coupling bodies 1 and 2 are provided with attachment rings 3 and 4 for attaching accessories. End portions such as necklaces are respectively attached to the attachment rings 3 and 4 and used as stoppers.

As shown in FIGS. 2 and 4, the first coupling body 1 includes a hollow receiving member 6 in a shell member 5 whose outer periphery is a semi-elliptical rotating body.
The receiving member 6 includes an insertion recess 7 for inserting the second connector 2 and a columnar first permanent magnet M1 is fitted in a cylindrical portion 7b opened on the bottom surface 7a.
The shell member 5 includes a cylindrical magnet holding portion 5a, and the permanent magnet M1 is held by the magnet holding portion 5a and the cylindrical portion 7b. The shell member 5 and the receiving member 6 are integrated by welding or press fitting.
Note that the direction of the long axis of the elliptical rotating body is the direction of the axis of the insertion recess 7 along the insertion direction of the second connector 2.

Further, three spiral convex portions 8 are provided on the inner wall of the insertion concave portion 7 at regular intervals in the circumferential direction. Each of the spiral convex portions 8 forms a spiral with the same shape shown in FIGS. 5 to 7 and is like a thread of a triple thread. 5 to 7 are schematic views in which the insertion recess 7 of the receiving member 6 is developed on a plane.
Each spiral convex portion 8 includes a guide surface 8a continuous from the peak portion 8b toward the bottom surface 7a of the insertion concave portion 7 as shown in the figure. A portion opposite to the guide surface 8a and facing the bottom surface 7a of the insertion recess 7 is provided with a retaining surface 8c having a plane substantially perpendicular to the axis of the insertion recess 7, and the retaining surface 8c A space formed by coupling with the bottom surface 7a is defined as a retaining recess 7c.

Each of the spiral convex portions 8 is arranged so that each guide surface 8a is continuous toward the retaining concave portion 7c constituted by the adjacent spiral convex portions 8.
Moreover, the peak part 8b of the upper end in FIG. 5 which is the said guide surface 8a and is an insertion direction rear end of a 2nd coupling body makes the cross-sectional shape an acute angle.

On the other hand, the 2nd coupling body 2 is provided with the cylindrical insertion part 10 in the shell part 9 of a semi-elliptical rotary body, as shown to FIG. By inserting the insertion portion 10 into the insertion recess 7 of the first connecting body 1, the connecting bodies 1 and 2 are connected.
A cylindrical second permanent magnet M2 is provided inside the insertion portion 10. The permanent magnet M2 is fixed to the insertion portion 10 by bonding or caulking.
The second permanent magnet M2 and the first permanent magnet are magnets each provided with a magnetic pole in the axial direction. Then, as shown in FIG. 4, the magnetic poles are arranged so that different magnetic poles appear on the opposing surfaces of the magnets M <b> 1 and M <b> 2 when the coupling bodies 1 and 2 are coupled.

  Further, on the outer periphery on the distal end side of the insertion portion 10, three convex portions 11 are provided equally in the circumferential direction. As shown in FIGS. 3 to 7, this convex portion 11 constitutes the retaining convex portion of the present invention, and its insertion direction front end 11 a is a curved surface and its rear end is a flat locking surface 11 b. . The locking surface 11b is formed to face the retaining surface 8c when the convex portion 11 is positioned in the retaining recess 7c of the insertion recess 7.

Further, the projection 11 has an axial direction of the insertion portion 10, that is, a length L1 (see FIG. 6) in the insertion direction substantially equal to a length L2 of the retaining recess 7c formed in the insertion recess 7. ing.
In addition, although the three convex parts 11 are provided in the said insertion part 10, in FIG.6, 7, only the specific convex part 11 is shown and the other convex part 11 is abbreviate | omitted. All the convex portions 11 have the same shape as the illustrated convex portion 11 and function in the same manner.

When the fastener for the accessory constructed as described above is connected, the insertion portion 10 of the second connection body 2 is inserted into the insertion recess 7 of the first connection body 1. When inserted into the insertion recess 7 and its tip approaches the spiral projection 8, the first magnet provided with the projection 11 and the second magnet M2 on the bottom surface 7a of the insertion recess 7 as shown in FIG. Since it approaches M1, attractive force acts between both magnets M1 and M2.
Therefore, when the tip 11a of the convex portion 11 comes into contact with the guide surface 8a, a component force along the guide surface 8a acts on the convex portion 11 based on the attractive force, and the insertion portion 10 smoothly moves to the bottom surface. 7a.

The convex portion 11 moves toward the retaining recess 7c along the inclination of the guide surface 8a no matter which position of the guide surface 8a is initially contacted. In this embodiment, the tip of the convex portion 11 is moved. Since 11a is curved, it moves more smoothly on the guide surface 8a.
Thus, after the convex part 11 moves in the direction of the arrow from the position of the convex part 11 shown by a solid line in FIG. 6 and contacts the guide surface 8a, it moves along the guide surface 8a and finally adjoins. It is in a connected state by being accommodated in a retaining recess 7c constituted by the spiral convex portion 8 and the bottom surface 7a.

And if the said convex part 11 is settled in the said retaining recess 7c, the latching surface 11b of the rear end side of the said convex part will face the retaining surface 8c of the spiral convex part 8. FIG. Therefore, even if a force along the axis that separates the first and second coupling bodies 1 and 2 acts, the locking surface 11b comes into contact with the retaining surface 8c, and movement in the removal direction can be prevented.
In particular, since the retaining surface 8c and the retaining surface 11b face each other, the contact area is large when the two come into contact with each other, and the rotational direction is hardly displaced.

In this embodiment, since the insertion direction length L1 of the convex portion 11 and the insertion direction length L2 of the retaining portion 7c are substantially equal, the convex portion 11 is within the retaining recess 7c. There is no backlash. Therefore, the connection state of both the coupling bodies 1 and 2 can be maintained more reliably.
However, even if there is a difference between the lengths L1 and L2, there is an effect that the locking surface 11b, which is a flat surface, comes into contact with the retaining surface 8c and exhibits the function of preventing the coupling bodies 1 and 2 from coming off. It is done.

Further, as described above, since the peak portion 8b of the spiral convex portion 8 is sharpened at an acute angle, when the retaining convex portion 11 first comes into contact with the peak portion 8b, the tip of the convex portion 11 is formed. 11a slides on the peak portion 8b and moves to the left or right as shown in FIG.
When the tip 11a of the projection 11 comes into contact with the guide surface 8a, the tip 11a moves along the guide surface 8a, reaches the inside of the retaining recess 7c, and is connected as shown by a broken line or a two-dot chain line.

When removing the first and second connected bodies 1 and 2 connected as described above, if the second connected body 2 is rotated so that the convex portion 11 moves in the right direction in FIGS. The convex portion 11 moves in the direction opposite to the arrow shown in FIGS. 6 and 7 along the guide surface 8a and deviates from the spiral convex portion 8.
That is, only by rotating the 1st, 2nd connection bodies 1 and 2 to a predetermined direction, both connection bodies 1 and 2 can move to an axial direction, and can remove a stopper easily.

In the above-described embodiment, the number of the spiral convex portions 8 and the convex portions 11 is three, but the number is not limited to three.
However, when the number is set to 3 as in the above embodiment, a triple thread is formed in the insertion recess, and the amount of axial movement can be reduced with a smaller amount of rotation than the single thread or double thread. There is a merit that can be enlarged. Therefore, the first and second connecting bodies 1 and 2 can be moved in the axial direction with a slight rotation, and can be easily connected and detached.

In particular, since there are many small fastener parts for jewelry, it is difficult to pinch the small first and second connecting bodies 1 and 2 and rotate them to a large extent. Removal work becomes easy.
Moreover, in order to reduce a required amount of rotation, it is also possible to make the spiral convex part 8 and the convex part 11 into 4 or more. However, if the numbers of the spiral convex portions 8 and the convex portions 11 are increased, the processing of the insertion concave portion 7 and the insertion portion 10 becomes complicated and the weight also increases. As a stop for a normal accessory, three spiral protrusions are appropriate.
However, when the stopper is large, it is possible to further increase the number of the spiral convex portions 8 and the convex portions 11.

  Furthermore, in the said embodiment, although the permanent magnets M1 and M2 are provided in both the 1st and 2nd connection bodies 1 and 2, a permanent magnet is only one of the 1st, 2nd connection bodies 1 and 2. FIG. A magnetic member on which the magnetic force of the permanent magnet acts may be provided on the other side.

  The present invention can be applied to necklaces, bracelets, watches, and the like.

DESCRIPTION OF SYMBOLS 1 1st connection body 2 2nd connection body 7 Insertion recessed part 7a Bottom face 7c Retaining prevention recessed part 8 Screw-shaped convex part 8a Guide surface 8b Peak part 8c Retaining surface 10 Insertion part 11 (Retaining prevention) Protruding part 11a Tip 11b Locking Surface M1 Permanent magnet M2 Permanent magnet

Claims (5)

Consisting of a first and a second linking body,
A permanent magnet is provided on at least one of the first and second connected bodies, and a permanent magnet or a magnetic member is provided on the other,
The first coupling body includes an insertion recess provided on the bottom surface with the permanent magnet or the magnetic member,
The second coupling body includes an insertion portion that can be inserted into the insertion recess and is provided with the permanent magnet or the magnetic member at the tip thereof.
In a connected state in which the insertion portion is inserted into the insertion recess, a fastener for a jewelry that is configured so that an attractive force due to the magnetic force of the permanent magnet acts between the first and second connected bodies,
While providing a plurality of spiral projections on the inner peripheral surface of the insertion recess of the first connector,
Each of the spiral convex portions is
A retaining surface that faces the bottom surface of the insertion recess and forms a retaining recess in combination with the bottom surface;
A guide surface that continues from the opening of the insertion recess toward the retaining recess configured by the adjacent spiral projection,
The insertion part of the second connector is
On its outer periphery, provided with a retaining projection that moves along the guide surface of the spiral projecting portion and can enter the retaining recess.
The retaining surface provided on the spiral convex portion is a plane substantially perpendicular to the axis of the insertion concave portion, which is the insertion direction of the insertion portion, and
The retaining projection provided on the insertion portion is provided with a locking surface having a flat surface facing the retaining surface in the retaining recess at the rear end in the insertion direction to the insertion recess. Stopper for jewelry. The retaining protrusion is
The fastener for jewelry as set forth in claim 1, wherein the distal end in the insertion direction into the insertion recess is a curved surface.   3. The fastener for accessory according to claim 1, wherein a dimension in the insertion direction of the retaining protrusion is substantially equal to a length of the retaining recess in the insertion direction of the insertion part.   The said helical convex part was provided with the peak part which made the cross-sectional shape an acute angle in the insertion direction rear end of the said 2nd coupling body which is the said guide surface, The any one of Claims 1-3 characterized by the above-mentioned. Stopper for jewelry as described in.   The number of the said helical convex part and the retaining convex part is 3, respectively, The fastener for jewelry of any one of Claims 1-4 characterized by the above-mentioned.

Images