JP2004187752A - Clasp for wrist watch band, retaining part used therefor, base plate and base plate connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a smooth movement of a retaining piece even after washing along with a better appearance, moreover the prevention of adverse effect attributed to the retaining pawl and a higher working efficiency in production in a double open type clasp for a wrist watch band. <P>SOLUTION: Herein used are a retaining part which houses the retaining piece 10 in a housing 9 having a window part 901 with a retaining pawl protruding from the window part 901 and a base plate 2 made thicker by rounding it slightly toward the center from both ends thereof along the longitudinal direction of the wrist watch band, on the side opposite to the insertion of the retaining piece 10 while first and second top plates 3 and 4 are connected being freely foldable onto the base plate 2 by making connecting pins 15 each having a recessed part 1501 pierce cylindrical connected parts formed at the respective connected side end parts thereof. Also, the portions of the connected parts corresponding to the respective recessed parts 1501, are protruded out to the inner circumference side to be fitted into the recessed parts 1501 thereby fixing the connecting pins 15 in place. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a watch band middle clasp and a locking portion used therefor, a lower plate, and a connection structure of the lower plate. More specifically, the present invention relates to a watch band double clasp type clasp and a locking portion used therefor, a lower plate, and The present invention relates to a lower plate connecting structure.
[0002]
[Prior art]
Conventionally, as a clasp of a watch band, a double-leaf type has been used for the purpose of enhancing a sense of quality, and in the past, the present applicant has a ceramic holding portion held by a spring. It discloses a double clasp for a watch band (Japanese Patent No. 3359537).
[0003]
FIG. 15 is a perspective view for explaining a conventional double-ended clasp for a watch band proposed by the present applicant in the past (hereinafter simply referred to as “conventional clasp”). It is a stop.
[0004]
In the conventional clasp 31, the first upper plate 33 and the second upper plate 34 are foldably connected to the lower plate 32 having the holding window 3201 and the locking window 3202. One of the watch bands 35 is connected to the upper plate 33, and when the first upper plate 33 is folded toward the lower plate 32, a protrusion 3301 is provided at a position corresponding to the holding window 3201 of the lower plate 32. The holding portion 36 is inserted and fixed in the projection 3301.
[0005]
On the other hand, a front cover 37 is foldably connected to the second upper plate 34, and the other of the watch band 40 is connected to the front cover 37. Further, the front cover 37 is provided with a locking portion, and the locking portion is provided with a locking window 3202 of the lower plate 32 when the second upper plate 34 and the front cover 37 are folded to the lower plate 32 side. And a locking piece that is locked to
[0006]
In this configuration, when the first upper plate 33 is folded toward the lower plate 32, and then the second upper plate 34 and the front cover 37 are folded toward the lower plate 32, the holding portion 36 is held by the holding window 3201. At the same time, the locking piece is locked in the locking window 3202 of the lower plate 32, whereby the clasp of the watch band is completed. In the drawing, reference numeral 38 denotes a push button integrally provided with a locking piece locked by the locking window 3202.
[0007]
[Problems to be solved by the invention]
(1) Issues related to locking parts
FIG. 16 and FIG. 17 are views for explaining a locking portion (hereinafter, referred to as “conventional locking portion”) provided and used in the front cover 37 in the conventional clasp. The engaging portion has a housing 41 having a groove 4101 formed on the lower surface, and a lid 42 mounted on the upper surface of the housing 41. A fitting projection 4202 is protruded from the lid 42 so as to be freely bent. A small window 4201 is formed.
[0008]
On the other hand, in the housing 41, a pair of locking pieces 38 each having a locking claw 3801 are arranged so that the locking claw 3801 protrudes from the groove 4101 and orthogonal to the longitudinal direction of the watch band. And a spring 39 is interposed between the pair of locking pieces 38. The action of the spring 39 causes the pair of locking pieces 38 to move inside the housing 41. It is biased to the outside of the housing 41 so as to be movable to the side.
[0009]
A fitting groove 3802 is formed in one of the locking pieces 38, and the fitting protrusion 4202 bent toward the housing 41 is fitted into the fitting groove 3802, thereby forming a locking piece. 38 is held in a housing 41.
[0010]
When the conventional locking portion is set, after the lid 42 is attached to the housing 41, the pair of locking pieces 38 with the spring 39 interposed are housed in the housing 41 through the groove 4101. Then, the fitting protrusion 4202 is bent, and the bent fitting protrusion 4202 is fitted into the fitting groove 3801. In this state, the fitting protrusion 4202 is mounted in the front cover 37.
[0011]
However, it has been pointed out that the groove 4101 is exposed on the lower surface of the conventional locking portion when it is mounted on the front cover 37, and the appearance is poor.
[0012]
Therefore, an object of the present invention is to provide a clasp for a watch band that has a good appearance, particularly on the lower surface of the locking portion.
[0013]
(2) Issues related to locking pieces
As described above, the locking pieces 38 are urged to the outside of the housing 41 by the springs 39, and each of the locking pieces 38 is pressed into the housing 41 so that the locking claw 3801 and the locking window 3202 can be moved. At this time, the lubricating oil diluted with an organic solvent is applied to the locking piece 38 in the conventional center clasp to smooth the movement of the locking piece 38 at this time.
[0014]
On the other hand, the lubricating oil is washed away by washing the clasp after long-term use.However, at this time, since general watch shops often do not prepare organic solvents, they are diluted. No lubricating oil would be applied. Then, there is a problem that excess oil seeps out to the surface side of the locking portion and causes stains.
[0015]
Therefore, an object of the present invention is to provide an inner clasp for a watch band that can smoothly move a locking piece even when washing is performed.
[0016]
(3) Issues related to lower plate
FIG. 18 is a diagram showing a structure in the vicinity of the locking window 3202 in a state where the locking claw 3801 is locked to the locking window 3202 in the conventional center clasp, as viewed in the longitudinal direction of the watch band. In the conventional center clasp, when the locking claw 3801 is locked to the locking window 3202, the locking claw 3801 protrudes from the lower plate 32. In some cases, the skin may be damaged by the claws 3801, and traces of the locking claws 3801 may remain on the skin.
[0017]
In view of the above, an object of the present invention is to provide a watch band clasp that can prevent an adverse effect of a locking claw.
[0018]
(4) Issues related to the connection structure of the lower plate
FIG. 19 and FIG. 20 are views for explaining a method of foldably connecting a lower plate to a first upper plate or a second upper plate in a conventional clasp. The connecting side end of the lower plate 32 and the upper plate 33 is bifurcated, and the bifurcated portion is rounded into a substantially cylindrical shape to form a connecting portion 3203. Are rounded into a substantially cylindrical shape so that they can be inserted between the two forks, to form a connecting portion (not shown), and the two forked connecting portions 3203 formed on the first upper plate 33 and the second upper plate 34 are formed. After arranging the connecting portions formed on the lower plate 32, the connecting portions are penetrated by the connecting pins 43, and the distal end of the connecting portion 3203 is connected to the first upper plate 33 or the second upper plate as shown in FIG. The tip of the connecting portion formed at the end of the lower plate 32 by deforming to the side 34 It deforms to the lower plate side, and then crushes both ends of the connecting pin to fix the position of the connecting pin 43, whereby the lower plate 32 and the first upper plate 33 and the lower plate 32 and the second upper plate The plate 34 was foldably connected.
[0019]
However, in such a connecting method, a problem has been pointed out that frictional heat is generated when both ends of the connecting pin are crushed, and work is not performed smoothly due to the influence of the frictional heat. Further, it is pointed out that a step of further deforming the connecting portion 3203 after inserting the connecting pin 43 is required.
[0020]
Therefore, the present invention also has an object to improve work efficiency when connecting the lower plate and the first or second upper plate.
[0021]
[Means for Solving the Problems]
The watch band clasp of the present invention has a lower plate having a holding window and a locking window, and one end is rotatably connected to one of the watch bands and the other end is foldably connected to the lower plate, Further, a first upper plate having a projection having a cavity, which can be inserted into the holding window of the lower plate when this is folded toward the lower plate, and the first upper plate, which is inserted and fixed in the cavity, A holding portion that is held by the holding window of the lower plate when the first upper plate is folded toward the lower plate, a second upper plate having one end foldably connected to the lower plate; Is rotatably connected to the other end of the watch band, the other end is foldably connected to the other end of the second upper plate, and this is folded together with the second upper plate to the lower plate side. A locking portion having a locking piece inserted and locked into the locking window of the lower plate at the time. A front lid portion which, even during a watch band clasp with a
The locking portion includes a housing having a window on the lower surface and a locking claw, and the locking claw is arranged to protrude from the window, and is movable in a direction orthogonal to a longitudinal direction of the watch band. And a pair of locking pieces housed in the housing, and between the pair of locking pieces, thereby urging the pair of locking pieces outwardly perpendicular to the longitudinal direction of the watch band. And a spring,
On the opposite side of the locking piece, the lower plate is slightly rounded from both ends along the longitudinal direction of the watch band toward the center to increase the thickness,
The lower plate and the first upper plate form a substantially cylindrical inner connection portion at a connection side end of the lower plate or the first upper plate with the first upper plate or the lower plate. At the connection side end of the lower plate or the first upper plate in the upper plate or the lower plate, when the first upper plate and the lower plate are connected to each other, the positions are located at both ends of the inner connection portion. Forming a pair of substantially cylindrical outer connecting portions, disposing the pair of outer connecting portions on both ends of the inner connecting portion, and inside the inner connecting portion and the outer connecting portion, in the vicinity of a central portion directed in the longitudinal direction. Inserting a connecting pin having a concave portion, and then projecting a portion corresponding to the concave portion in the inner connecting portion to the inner peripheral side to form a fitting protrusion and fitting the fitting protrusion into the concave portion, This allows it to be freely folded and connected,
The lower plate and the second upper plate form a substantially cylindrical inner connecting portion at a connection side end of the lower plate or the second upper plate with the second upper plate or the lower plate. At the connection side end of the lower plate or the second upper plate in the upper plate or the lower plate, when the second upper plate and the lower plate are connected to each other, they are located at both ends of the inner connection portion. Forming a pair of substantially cylindrical outer connecting portions, disposing the pair of outer connecting portions on both ends of the inner connecting portion, and inside the inner connecting portion and the outer connecting portion, in the vicinity of a central portion directed in the longitudinal direction. Inserting a connecting pin having a concave portion, and then projecting a portion corresponding to the concave portion in the inner connecting portion to the inner peripheral side to form a fitting protrusion and fitting the fitting protrusion into the concave portion, This is characterized by being foldably connected.
[0022]
【The invention's effect】
(1) Effect of locking part
The locking portion of the clasp for a watch band according to the present invention includes a housing having a window portion on a lower surface, a locking claw, and a configuration in which the locking claw protrudes from the window portion. A pair of locking pieces housed in the housing so as to be movable in a direction perpendicular to the direction, and provided between the pair of locking pieces, whereby the pair of locking pieces are respectively disposed in the longitudinal direction of the watch band. And a spring which is urged outward in a direction perpendicular to the direction in which the groove formed in the housing in the conventional clasp is eliminated. Therefore, it is possible to eliminate the poor appearance of the lower surface of the locking portion.
[0023]
At this time, by applying a resin to the sliding surface of the locking piece, it is possible to smoothly move the locking piece even when the clasp is washed.
[0024]
(2) Effect of lower plate
In the clasp for a watch band of the present invention, in forming the lower plate, on the side opposite to the locking piece, from the both ends along the longitudinal direction of the watch band, it is slightly rounded toward the center to increase the thickness. Have many. Therefore, the locking claws do not protrude from the lower plate, and it is possible to prevent the adverse effects of the locking claws.
[0025]
(3) Effect of lower plate connection structure
In the present invention, the lower plate and the first upper plate are connected by forming a substantially cylindrical inner connecting portion at an end of the lower plate or the first upper plate on the connection side with the first upper plate or the lower plate. When the first upper plate and the lower plate of the first upper plate or the lower plate are connected to the lower plate or the connection side end of the first upper plate, respectively, A pair of substantially cylindrical outer connecting portions is formed in the located position, and the pair of outer connecting portions are arranged on both end sides of the inner connecting portion, and the inner connecting portion and the outer connecting portion are oriented in the longitudinal direction. A connecting pin having a concave portion near the center portion is inserted, and then a portion corresponding to the concave portion in the inner connecting portion is protruded to the inner peripheral side to form a fitting protrusion, and this fitting protrusion is inserted into the concave portion. The connection between the lower plate and the second upper plate in the present invention is performed by fitting. A substantially cylindrical inner connection portion is formed at a connection end of the lower plate or the second upper plate with the second upper plate or the lower plate, and the lower plate or the second lower plate of the second upper plate or the lower plate is formed. A pair of substantially cylindrical outer connecting portions are formed at ends connected to the upper plate and arranged at both ends of the inner connecting portion when the second upper plate and the lower plate are connected. Along with disposing the pair of outer connecting portions on both ends of the inner connecting portion, inserting a connecting pin having a concave portion near a central portion in the longitudinal direction into the inner connecting portion and the outer connecting portion, and thereafter, This is performed by projecting a portion corresponding to the concave portion in the inner connecting portion toward the inner peripheral side to form a fitting projection and fitting the fitting projection into the concave portion.
[0026]
Therefore, unlike the conventional clasp, a step of crushing both ends of the connecting pin is unnecessary, and the connecting pin does not receive frictional heat, so that the working efficiency can be improved. Further, since the substantially cylindrical connecting portion is used, it is not necessary to further deform the connecting portion after inserting the connecting pin.
[0027]
【Example】
(1) Overall configuration
The embodiment will be described with reference to the drawings. FIG. 1 is a diagram showing a clasp for a watch band of the present embodiment (hereinafter, simply referred to as “clamp”). It is a clasp.
[0028]
Then, in the clasp 1 for a watch band in the present embodiment, the first upper plate 3 and the second upper plate 4 are foldably connected to the lower plate 2 having the holding window 201 and the locking window 202. One of the watch bands (not shown) is connected to the upper plate 3.
[0029]
The first upper plate 3 is adjusted to a size that allows the first upper plate 3 to be inserted into the holding window 201 at a position corresponding to the holding window 201 when the first upper plate 3 is folded toward the lower plate 2. The protrusion 301 is provided, and the holding portion 6 is inserted and fixed in the protrusion 301.
[0030]
(2) Configuration of holding unit
Here, the holding portion 6 will be described with reference to FIGS. 11 to 14. As shown in FIG. 12, the holding portion 6 in this embodiment is provided in a substantially cylindrical housing 601 via a spring 603. The movable holding portion 602 made of a spherical ceramic is mounted so as to be movable in the longitudinal direction of the housing 601 in such a manner that the tip portion thereof protrudes outside the housing 601 in a normal state. Accordingly, when the tip of the movable holding portion 602 is pushed toward the housing 601, the movable holding portion 602 enters the housing 601. The holding portion 6 is inserted into the cavity 302 formed in the protrusion 301 so that the edge of the holding window 201 and the tip of the movable holding portion 602 come into contact when the protrusion 301 is inserted into the holding window 201. Fixed. This allows the first upper plate 3 to be held by the lower plate 2 as shown in FIG.
[0031]
FIG. 14 shows a mode in which the thickness of the lower plate 2 in the vicinity of the holding window 201 is reduced, whereby even when the first upper plate 3 is folded into the lower plate 2, the entire thickness ( L) in FIG. 14 can be made thinner, and the sense of quality can be enhanced.
[0032]
(3) Configuration of locking part
Next, a front cover 5 to which the other of the watch band (not shown) is connected is foldably connected to the second upper plate 4, and the front cover 5 is connected to the locking window 202. A locking portion 8 to be stopped is provided.
[0033]
Here, FIG. 2 is an exploded view for explaining the front cover 5. In the present embodiment, the front cover 5 has a front cover 7, and the front cover 7 has a pin hole 704. The connecting portion 705 is connected to the other of the watch band via a pin hole 706 by a pin or the like via a pin hole 706. In addition, the locking portion 8 is accommodated in the front cover 7 through a pin hole 703 by a pin (not shown) or the like, and is formed in the pin hole 402 formed in the second upper plate 4 and the locking portion 8. Through the pin hole 901 and the pin hole 702 formed in the front cover 7, the front cover 5 having the locking portion 8 is connected to the second upper plate 4 by a pin or the like (not shown). In the drawing, reference numeral 701 denotes a penetrating window through which the tip of the locking piece 10 described later penetrates.
[0034]
Next, as shown in an exploded view of FIG. 3, the locking portion 8 includes a housing 9 having a window 901 on the lower surface, and a lid 11 for closing the upper surface of the housing 9. Is formed with a pair of small windows 1101.
[0035]
Further, a pair of locking pieces 10 are housed in the housing 9 in such a manner that the tips thereof protrude outside the housing 9 and are movably accommodated in a direction orthogonal to the longitudinal direction of the watch band. In addition, a spring 12 is interposed between the pair of locking pieces 10 (see FIG. 5), whereby each of the pair of locking pieces 10 is urged to the outside of the housing 9 by the spring 12. ing.
[0036]
Further, each of the pair of locking pieces 10 includes a locking claw 1001 that can be locked to the locking window 202, and the locking claw 1001 is arranged so that each locking claw 1001 penetrates the window 901. It is housed in a housing 9.
[0037]
When setting the locking portion 8 configured as described above, the lid 11 is spotted on the housing 9 after the locking piece 10 is accommodated in the housing 9. Thereafter, a spring 12 is inserted between the pair of locking pieces 10 through the small window 1101.
[0038]
Then, the pair of locking pieces 10 are movable in the housing 9 in a direction orthogonal to the longitudinal direction of the watch band, and the movement thereof is limited to a range in which the locking claw 1001 moves in the window 901. Further, a state is urged to the outside of the housing 9 by the spring 12, and the tip of the locking piece 10 is pushed to move the locking claw 1001, whereby the locking portion 8 is moved to the locking window 202. , And the lock can be released.
[0039]
That is, FIG. 6 is a cross-sectional view for explaining the operation of the locking portion 8, and FIG. 6A shows a state before the locking portion 8 is locked to the locking window 202.
[0040]
Then, in this state, the front end of the locking piece 10 is pushed toward the housing 9, and the front lid 5 is folded toward the lower plate 2 together with the second upper plate 4. As shown in (B), (C), and (D), the locking claw 1001 penetrating the formed through window 401 pushes the locking window 202 close to the edge of the locking window 202 so as to be pushed. After that, the locking claw 1001 is locked by the locking window 202 as shown in FIG.
[0041]
As described above, in the locking portion 8 in this embodiment, the window 902 is formed in the housing 9, and the locking piece 10 is housed in the housing 9 in such an arrangement that the locking claw 1001 penetrates the window 901. Therefore, unlike the conventional clasp, no groove is formed in the housing, so that the appearance can be prevented from being deteriorated by the presence of the groove.
[0042]
(4) Structure of locking piece
Next, in the present embodiment, a resin, more specifically, a fluororesin is applied to a sliding portion of the locking piece 10 with the lid 11, thereby smoothing the movement of the locking piece 10.
[0043]
That is, as described above, when the front end of the locking piece 10 is pushed toward the housing 9 and the front cover 5 is folded toward the lower plate 2 together with the second upper plate 4, FIG. (C) As shown in (D), the locking claw 1001 passes through the locking window 202 while approaching and approaching the edge of the locking window 202. At this time, (C), (D) As shown in (), the vicinity of the base end of the locking claw 1001 contacts the lower surface of the lid 11 of the locking portion 8. Therefore, in order to make the movement of the locking piece 10 smooth, it is necessary to perform some processing particularly on the sliding portion between the locking piece 10 and the lid portion 11. Conventionally, lubricating oil diluted with an organic solvent is applied. Was. However, as described above, this lubricating oil is washed away when the clasp is washed after a long-term use. In such a case, the lubricating oil diluted with an organic solvent must be applied again in such a case. However, general watch shops often do not prepare organic solvents, so undiluted lubricating oil must be applied, which causes the oil to seep onto the surface of the locking part. Was pointed out.
[0044]
Therefore, in this embodiment, a fluororesin is applied particularly to the sliding portion of the locking piece 10 with the lid 11, thereby eliminating the need for lubricating oil for smooth movement of the locking piece 10. By doing so, permanent lubrication can be maintained even after washing of the clasps and the like, and the above-mentioned problem when lubricating oil or the like is used has been solved. In this example, Teflon (registered trademark) was used as the fluororesin.
[0045]
(5) Configuration of lower plate
Next, FIG. 8 is a diagram showing a structure near the locking window 202 in a state where the locking piece 10 is locked to the locking window 202 in a longitudinal direction of the watch band. 2 is slightly rounded from the both ends along the longitudinal direction of the watch band toward the center on the side opposite to the insertion side of the locking piece 10, that is, on the lower surface, to increase the thickness.
[0046]
This prevents the locking claw 1001 from protruding greatly from the lower plate 2 and slightly rounds the center from both ends along the longitudinal direction of the watch band. The thickness of both ends along the direction is made the same as in the conventional case, thereby preventing the design from being spoiled.
[0047]
(6) Lower plate connection structure
Next, FIGS. 9 and 10 are diagrams for explaining the connection structure between the lower plate 2 and the first upper plate 3 and the lower plate 2 and the second upper plate 4 in this embodiment. In the embodiment, cylindrical inner connecting portions 13A and 13B are integrally formed at both ends of the lower plate 2 in the longitudinal direction, in the vicinity of a substantially central portion in a direction orthogonal to the longitudinal direction of the watch band. On the other hand, the first upper plate 3 and the second upper plate 4 are connected to the lower plate 2 at the connection side ends of the first upper plate 3 and the second upper plate 4 with the lower plate 2, respectively. At this time, a pair of cylindrical outer connecting portions 14A and 14B are formed integrally with each other so as to be located at both ends of the inner connecting portions 13A and 13B.
[0048]
Then, the connection pin 15 having a recess 1501 formed in the vicinity of the central portion in the longitudinal direction so as to penetrate the inner connection portions 13A and 13B and the outer connection portions 14A and 14B is connected to the cylindrical inner connection portion 13A. , 13B and the outer connecting portions 14A, 14B are inserted into the cavities, whereby the first upper plate 3 and the second upper plate 4 are foldably connected to the lower plate 2.
[0049]
Further, a portion of the inner connecting portions 13A and 13B corresponding to the recess 1501 is protruded inwardly to form a fitting protrusion 1302, and the fitting protrusion 1302 is fitted into the recess 1501. Thereby, the position of the connecting pin 15 is fixed. FIG. 10 shows this state as viewed in the longitudinal direction of the watch band.
[0050]
Therefore, in the present embodiment, unlike the conventional center clasp in which the connecting portion is further deformed after the connecting pin is inserted and both ends of the connecting pin are crushed and the position thereof is fixed, the connecting pin may take frictional heat. In addition, the number of working steps can be reduced, and the improvement of working efficiency can be achieved.
[0051]
In the present embodiment, the case where the inner connecting portions 13A and 13B are formed on the lower plate 2 and the outer connecting portions 14A and 14B are formed on the first upper plate 3 and the second upper plate 4 has been described. However, the present invention is not necessarily limited to this form. The first upper plate 3 and the second upper plate 4 are formed with inner connecting portions 13A and 13B, and the lower plate 2 is formed with outer connecting portions 14A and 14B. Is also good.
[Brief description of the drawings]
FIG. 1 is a view showing an embodiment of a clasp for a watch band.
FIG. 2 is a view for explaining a front cover part in the embodiment of the clasp for a watch band.
FIG. 3 is a view for explaining a locking portion in the embodiment of the clasp for a watch band.
FIG. 4 is a view for explaining a locking portion in the embodiment of the clasp for a watch band.
FIG. 5 is a view for explaining a locking portion in the embodiment of the clasp for a watch band.
FIG. 6 is a view for explaining the operation of the locking piece in the embodiment of the clasp for a watch band.
FIG. 7 is a view for explaining a locking piece in the embodiment of the clasp for a watch band.
FIG. 8 is a diagram for explaining a lower plate in the embodiment of the clasp for a watch band.
FIG. 9 is a view for explaining a connection structure between a lower plate and a first upper plate and a lower plate and a second upper plate in the embodiment of the clasp for a watch band.
FIG. 10 is a view for explaining a connection structure between a lower plate and a first upper plate and a lower plate and a second upper plate in the embodiment of the clasp for a watch band.
FIG. 11 is a view showing a relationship between a first upper plate and a holding portion in the embodiment of the clasp for a watch band.
FIG. 12 is a view showing a structure of a holding portion in the embodiment of the watch band clasp.
FIG. 13 is a view showing the operation of the holding portion in the embodiment of the watch band clasp.
FIG. 14 is a view showing an operation of the holding portion in the embodiment of the watch band clasp.
FIG. 15 is a view for explaining a conventional clasp for a watch band.
FIG. 16 is a view for explaining a locking portion in a conventional watch band clasp.
FIG. 17 is a view for explaining a locking portion in a conventional watch band clasp.
FIG. 18 is a view for explaining a lower plate of a conventional clasp for a watch band.
FIG. 19 is a view for explaining a connection structure between a lower plate and a first upper plate and a lower plate and a second upper plate in a conventional watch band clasp.
FIG. 20 is a view for explaining a connection structure between a lower plate and a first upper plate and a lower plate and a second upper plate in a conventional watch band clasp.
[Explanation of symbols]
Nakadome for 1 watch band
2 Lower plate
201 Holding window
202 Locking window
3 First upper plate
301 protrusion
302 cavity
4 Second upper plate
5 Front cover
6 Holder
601 housing
602 movable holding unit
603 spring
7 Front lid
8 Locking part
9 Housing
901 window
10 Locking pieces
1001 locking claw
1002 sliding part
11 Lid
1101 Small window
12 Spring
13A, 13B Inside connection part
1302 fitting projection
14A, 14B Outer joint
15 Connecting pin
1501 recess

Claims (6)

A lower plate (2) having a holding window (201) and a locking window (202);
One end is rotatably connected to one side of the watch band, and the other end is foldably connected to the lower plate (2). Further, when this is folded toward the lower plate (2), the lower plate ( 2) a first upper plate (3) having a projection (301) having a cavity (302), which can be inserted into the holding window (201);
When the first upper plate (3) inserted and fixed in the hollow portion (302) is folded toward the lower plate (2), the first upper plate (3) is held in the holding window (201) of the lower plate (2). Holding part (6) to be
A second upper plate (4) having one end foldably connected to the lower plate (2);
One end is rotatably connected to the other end of the watch band, the other end is foldably connected to the other end of the second upper plate (4), and further connected to the second upper plate (4). And a table having a locking portion (8) including a locking piece (10) that is inserted and locked into a locking window (202) of the lower plate (2) when folded toward the lower plate (2). A clasp for a watch band having a lid (5),
The locking portion (8)
A housing (9) having a window (901) on the lower surface;
The housing (9) is provided with a locking claw (1001), the locking claw (1001) protruding from the window (901), and movably in a direction perpendicular to the longitudinal direction of the watch band. A pair of locking pieces (10) housed therein;
A spring (12) provided between the pair of locking pieces (10) to thereby bias the pair of locking pieces (10) outwardly perpendicular to the longitudinal direction of the watch band;
The lower plate (2) is slightly rounded from both ends along the longitudinal direction of the watch band toward the center on the side opposite to the locking piece (10) to increase the thickness,
The lower plate (2) and the first upper plate (3)
A substantially cylindrical inner connecting portion (13A) is formed at an end of the lower plate (2) or the first upper plate (3) on the connection side with the first upper plate (3) or the lower plate (2);
A first upper plate (3) and a lower plate (2) are provided at the end of the first upper plate (3) or the lower plate (2) on the side of connection with the lower plate (2) or the first upper plate (3). ) To form a pair of substantially cylindrical outer connecting portions (14A) arranged at both ends of the inner connecting portion (13A), respectively.
The pair of outer connecting portions (14A) are arranged at both ends of the inner connecting portion (13A), and the inside of the inner connecting portion (13A) and the outer connecting portion (14A) are located near the center in the longitudinal direction. Insert the connecting pin (15) having the concave portion (1501),
Thereafter, a portion corresponding to the concave portion (1501) in the inner connecting portion (13A) is projected to the inner peripheral side to form a fitting protrusion (1302), and this fitting protrusion (1302) is connected to the concave portion (1501). Inside, and it can be folded freely,
The lower plate (2) and the second upper plate (4)
A substantially cylindrical inner connecting portion (13B) is formed at an end of the lower plate (2) or the second upper plate (4) on the connection side with the second upper plate (4) or the lower plate (2);
A second upper plate (4) and a lower plate (2) are provided at the connection side end of the second upper plate (3) or the lower plate (2) with the lower plate (2) or the second upper plate (4). ) To form a pair of substantially cylindrical outer connecting portions (14B) arranged at both ends of the inner connecting portion (13B), respectively.
The pair of outer connecting portions (14B) are arranged at both ends of the inner connecting portion (13B), and the inside of the inner connecting portion (13B) and the outer connecting portion (14B) are located near the center in the longitudinal direction. Insert the connecting pin (15) having the concave portion (1501),
Thereafter, a portion corresponding to the concave portion (1501) in the inner connecting portion (13B) is protruded inwardly to form a fitting protrusion (1302), and this fitting protrusion (1302) is connected to the concave portion (1501). , Which were connected in a freely foldable manner,
A middle clasp for a watch band. A lower plate (2) having a holding window (201) and a locking window (202);
One end is rotatably connected to one side of the watch band, and the other end is foldably connected to the lower plate (2). Further, when this is folded toward the lower plate (2), the lower plate ( 2) a first upper plate (3) having a projection (301) having a cavity (302), which can be inserted into the holding window (201);
When the first upper plate (3) inserted and fixed in the hollow portion (302) is folded toward the lower plate (2), the first upper plate (3) is held in the holding window (201) of the lower plate (2). Holding part (6) to be
A second upper plate (4) having one end foldably connected to the lower plate (2);
A watch cover (5) having one end rotatably connected to the other end of the watch band and the other end foldably connected to the other end of the second upper plate (4). In the middle clasp, a locking part (8) mounted in the front lid part (5),
A housing (9) having a window (901) on the lower surface;
The housing (9) is provided with a locking claw (1001), the locking claw (1001) protruding from the window (901), and movably in a direction perpendicular to the longitudinal direction of the watch band. When the front lid portion (7) housed in the inside is folded toward the lower plate (2) side together with the second upper plate (4), the lower cover (2) engages with the locking window (202). A pair of locking pieces (10) to be inserted and locked;
A spring (12) that is provided between the pair of locking pieces (10), thereby biasing the pair of locking pieces (10) outwardly perpendicular to the longitudinal direction of the watch band. A locking portion used for a clasp for a watch band. The locking part used for the clasp for a watch band according to claim 2, wherein a resin is applied to a sliding part of the locking piece (10). A lower plate (2) having a holding window (201) and a locking window (202);
One end is rotatably connected to one side of the watch band, and the other end is foldably connected to the lower plate (2). Further, when this is folded toward the lower plate (2), the lower plate ( 2) a first upper plate (3) having a projection (301) having a cavity (302), which can be inserted into the holding window (201);
When the first upper plate (3) inserted and fixed in the hollow portion (302) is folded toward the lower plate (2), the first upper plate (3) is held in the holding window (201) of the lower plate (2). Holding part (6) to be
A second upper plate (4) having one end foldably connected to the lower plate (2);
One end is rotatably connected to the other end of the watch band, the other end is foldably connected to the other end of the second upper plate (4), and further connected to the second upper plate (4). And a table having a locking portion (8) including a locking piece (10) that is inserted and locked into a locking window (202) of the lower plate (2) when folded toward the lower plate (2). In a clasp for a watch band having a lid (5),
The thickness of the lower plate (2) on the side opposite to the insertion side of the locking piece (10) is slightly rounded from both ends along the longitudinal direction of the watch band toward the center, and is increased. Lower plate used for clasps for watch bands. A lower plate (2) having a holding window (201) and a locking window (202);
One end is rotatably connected to one side of the watch band, and the other end is foldably connected to the lower plate (2). Further, when this is folded toward the lower plate (2), the lower plate ( 2) a first upper plate (3) having a projection (301) having a cavity (302), which can be inserted into the holding window (201);
When the first upper plate (3) inserted and fixed in the hollow portion (302) is folded toward the lower plate (2), the first upper plate (3) is held in the holding window (201) of the lower plate (2). Holding part (6) to be
A second upper plate (4) having one end foldably connected to the lower plate (2);
One end is rotatably connected to the other end of the watch band, the other end is foldably connected to the other end of the second upper plate (4), and further connected to the second upper plate (4). And a table having a locking portion (8) including a locking piece (10) that is inserted and locked into a locking window (202) of the lower plate (2) when folded toward the lower plate (2). In a clasp for a watch band having a lid (5),
A substantially cylindrical inner connection portion (13A) is formed at an end of the lower plate (2) or the first upper plate (3) on the connection side with the first upper plate (3) or the lower plate (2). And
A first upper plate (3) and a lower plate (2) are provided at the end of the first upper plate (3) or the lower plate (2) on the side of connection with the lower plate (2) or the first upper plate (3). ) To form a pair of substantially cylindrical outer connecting portions (14A) arranged at both ends of the inner connecting portion (13A), respectively.
The pair of outer connecting portions (14A) are arranged at both ends of the inner connecting portion (13A), and the inside of the inner connecting portion (13A) and the outer connecting portion (14A) are located near the center in the longitudinal direction. Insert the connecting pin (15) having the concave portion (1501),
Thereafter, a portion corresponding to the concave portion (1501) in the inner connecting portion (13A) is projected to the inner peripheral side to form a fitting protrusion (1302), and this fitting protrusion (1302) is connected to the concave portion (1501). A first upper plate (3) is foldably connected to the lower plate (2), whereby the lower plate is used for a clasp for a watch band. A lower plate (2) having a holding window (201) and a locking window (202);
One end is rotatably connected to one side of the watch band, and the other end is foldably connected to the lower plate (2). Further, when this is folded toward the lower plate (2), the lower plate ( 2) a first upper plate (3) having a projection (301) having a cavity (302), which can be inserted into the holding window (201);
When the first upper plate (3) inserted and fixed in the hollow portion (302) is folded toward the lower plate (2), the first upper plate (3) is held in the holding window (201) of the lower plate (2). Holding part (6) to be
A second upper plate (4) having one end foldably connected to the lower plate (2);
One end is rotatably connected to the other end of the watch band, the other end is foldably connected to the other end of the second upper plate (4), and further connected to the second upper plate (4). And a table having a locking portion (8) including a locking piece (10) that is inserted and locked into a locking window (202) of the lower plate (2) when folded toward the lower plate (2). In a clasp for a watch band having a lid (5),
A substantially cylindrical inner connection portion (13B) is formed at an end of the lower plate (2) or the second upper plate (4) on the connection side with the second upper plate (4) or the lower plate (2). And
A second upper plate (4) and a lower plate (2) are provided at the connection side end of the second upper plate (4) or the lower plate (2) with the lower plate (2) or the second upper plate (4). ) To form a pair of substantially cylindrical outer connecting portions (14B) arranged at both ends of the inner connecting portion (13B), respectively.
The pair of outer connecting portions (14B) are arranged at both ends of the inner connecting portion (13B), and the inside of the inner connecting portion (13B) and the outer connecting portion (14B) are located near the center in the longitudinal direction. Insert the connecting pin (15) having the concave portion (1501),
Thereafter, a portion corresponding to the concave portion (1501) in the inner connecting portion (13B) is protruded inwardly to form a fitting protrusion (1302), and this fitting protrusion (1302) is connected to the concave portion (1501). Wherein the second upper plate (4) is foldably connected to the lower plate (2).

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