JP2000279217A - Length regulating mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the length regulating operation of a band and improve the apparent quality including design by providing a sliding inclination part inclined toward the band short-edge directional tip on a locking piece. SOLUTION: A slide cover has a connection part 14 annularly formed on the band longitudinal end part, and it is rotatably connected to one end of one band 9 through a connection pin 8. A pair of push plates 15 slidably housed in the housing part 12 of the slide cover has a pressing part 20 protruding out of a surface cover 7 through the guide groove 18 of the surface cover 7 at one end thereof. Further, each push plate 15 has a housing recessed part 21 for housing a spring 16 at the other end, a locking recessed part to be engagingly locked with an engagement piece 13 about in the center, and a locking piece 23 having an inclined surface inclined toward the band short-edge directional end surface. The locking piece 23 is energized in the direction of the guide groove 28 by the spring 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band length adjusting mechanism for a band clasp of a jewelry including a wristwatch, and more particularly to a folding clasp of a folding type called a two-fold clasp and a three-fold clasp.
In particular, it relates to a fine adjustment mechanism.

[0002]

2. Description of the Related Art A conventional mechanism for adjusting the length of a band of an accessory including a wristwatch will be briefly described with reference to FIGS. FIG. 16 is a perspective view showing a conventional band length adjusting mechanism, and FIG. 17 is a partially omitted sectional view showing the band length adjusting mechanism.

In a conventional band length adjusting mechanism 100, a sliding hole 112a and a plurality of locking recesses are formed in opposite side walls 112 of a front cover 111 having a substantially U-shaped cross section as shown in FIGS. 112b is integrated with the slide cover 114 serving as a connecting member, and a locking projection 114a is formed. Also, slide cover 11
Reference numeral 4 denotes a spring 116 which is an elastic member inside and the spring 116
A pair of push plates 115 having a symmetrical shape provided to face outwardly by the urging force are slidably held.
The push plate 115 has a protrusion 115 a and a locking recess 115.
b is formed. The protrusions 115a are provided on the push plate 115 by cutting and processing the Muku material integrally or by processing another member and performing brazing welding or screw processing. Also, the slide cover 1 is provided in the locking recess 115b.
14, the locking projection 114a is locked, and the locking recess 1
15b regulates the stroke of the push plate 115 and also serves as a stopper. The protrusion 115a is guided by the key groove 114b of the slide cover 114. Further, the projection 115a is engaged with a plurality of locking recesses 112b provided on both side walls 112 of the front cover 111.

Next, a description will be given of a method of adjusting the length adjusting mechanism 100 of the prior art. When the push plate 115 is pressed in the direction A against the urging force of the spring 116,
The locking recess 11a is guided by the key groove 114b.
2b, the engagement with the locking recess 112b is released. Then, while pressing the push plate 115 with a finger, an appropriate one of the other plurality of locking recesses 112b is selected, and by releasing the finger, the protrusion 115a engages and locks with the selected locking recess 112b. The band length can be adjusted.

[0005]

However, in the above-mentioned prior art band length adjusting mechanism 100,
When making fine adjustments to the band length according to the subtle differences in wrist thickness before and after exercise or before and after exercise, when wearing the band loosely, and then just fitting to the arm, or
When the band is detached, the band is slightly loosened to allow a sufficient length, and then the band is detached.
It is necessary to move the position of the locking piece and adjust the length by moving the projection 115a away from the locking recess 112b while maintaining the state in which the engagement between the and the slide cover 114 is released, and the operation is cumbersome.

[0006] Further, a locking projection 115 is provided on the push plate 115.
There is a problem that the manufacturing cost is increased because the process of projecting a is required.

[0007]

In order to achieve the above-mentioned object, a length adjusting mechanism according to the present invention is provided with a double folding clasp,
Or, a guide groove with a locking portion for fine adjustment of the band length is provided on both side walls of the front cover of the three-folded clasp, and is locked in a connecting member connected to the tip of one of the bands. The piece is urged toward the guide groove, the locking piece is inserted into the guide groove, the locking piece is engaged with the locking portion, and the locking piece and the locking portion engage. In a band length adjusting mechanism that can change a position and change a length of a band, a sliding inclined portion that is inclined toward a tip in a lateral direction of the band is provided on a locking piece. I do.

In addition, locking pieces are discharged elastically inward on both sides of the front cover of the two-folded clasp or the three-folded clasp, and are connected to the tip of one band. The connecting member has a guide groove with a locking portion for fine adjustment of the band length, and the locking piece is inserted into the guide groove to engage the locking portion with the locking portion. In the band length adjusting mechanism that can change the length of the band by changing the engagement position where the engaging portion engages with the engaging portion, the engaging piece has a sliding inclined portion inclined toward the guide groove. It is characterized by having been provided.

In order to operate the engagement of the locking piece with the locking portion, the locking piece is provided with a push plate which moves in conjunction with the locking piece. The engagement between the locking piece and the locking portion is released by pushing the push plate.

[0010] Further, the invention is characterized in that the locking piece and the push plate are integrated.

In one direction, the engagement position between the locking piece and the locking portion can be changed without operating the push plate.
The shape of the locking piece is characterized in that one side has a gentle slope toward the guide groove, and the other side has a steep slope toward the guide groove.

[0012] Further, the locking piece is wedge-shaped toward the tip.

[0013] Further, the invention is characterized in that the plurality of locking portions provided in the guide groove are formed of holes.

[0014] Further, the invention is characterized in that the locking piece is held in the connecting member and is in contact with the front lid by an elastic member.

Further, the elastic member is formed of a spring.

The locking piece is held in the connecting member integrally or separately from the connecting member, and is elastically pressed against the guide groove.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment The present invention will be described below in detail with reference to the drawings. FIG. 1 is an exploded perspective view of the first embodiment of the present invention, FIG. 2 is a sectional view of the same, FIG. 3 is a perspective view of the front cover seen from the back, FIG. a) is an exploded perspective view of the push plate, FIG.
(B) and FIG. 5 (c) are bending diagrams of the same push plate, FIGS. 6 (a) to 6 (d) are operation diagrams of the same length adjusting mechanism, and FIG. It is the perspective view which changed the position of the inclined surface.

1 to 6 show an example in which the present invention is applied to a three-fold fastening band of an accessory including a wristwatch. First, let's explain the outline of the three-fold middle clasp band,
As shown in FIG. 1, one band 9 is a slide cover 1.
Connected to 1. The other band is rotatably connected via a connection pin 2 to a hinge portion provided at one end of an outer plate 1 having an appropriately curved shape along the wrist. The other end of the outer plate 1 is rotatably connected to one end of a middle plate 5 via a connecting pin 4. The other end of the middle plate 5 is rotatably connected via a connecting pin 6 to a connecting hole 7a provided at one end of a front cover 7 which is a front cover. Then, the side wall 17 of the front cover 7 and the locking piece 23 located inside the slide cover 11 are engaged to form a three-fold middle clasp. The other ends of the bands 9 and 3 are rotatably connected to, for example, a watch body (not shown).

Next, the configuration of the length adjusting mechanism 10 will be described.
As shown in FIGS. 1 to 4, the length adjusting mechanism 10 includes a guide portion 10 </ b> A having a guide groove with an engagement concave portion and a slide portion 10 </ b> B which is a connecting member to be connected to the tip of one of the bands 9.
It is composed of The guide portion 10A is formed with a guide groove 18 and a plurality of engaging recesses 19 penetrating through the front and back sides of the opposite side wall 17 of the front cover 7 having a substantially U-shaped cross section. On the other hand, the slide portion 10B is
And a pair of push plates 15 having a symmetrical shape, and a spring 16 as an elastic member.

The slide cover 11 has a storage portion 12 opened in the widthwise direction of the band, and engagement pieces 13 integrally formed at both ends of the storage portion 12. A connecting portion 14 is formed in the slide cover 11 at an end in the band longitudinal direction in an annular shape, and is rotatably connected to one end of one of the bands 9 via the connecting pin 8 shown in FIG. . Next, a pair of push plates 15 slidably stored in the storage portion 12 of the slide cover 11 has one end thereof penetrating the guide groove 18 of the front cover 7 and extending outward of the front cover 7. A protruding pressing portion 20 is formed. The other end has a spring 16
Recess, which is provided with a storage recess 21 for storing the lock, a locking recess 22 for engaging and locking the engagement piece 13 at a substantially central portion, and an inclined surface 23a inclined toward an end surface in the short side direction of the band. 23 are formed. And the locking piece 23 is a spring 1
6 urges in the direction of the guide groove 18.

Further, a pair of push plates 15 are provided as shown in FIG.
After punching from a plate material into a developed shape as shown in FIG. 5A, as shown in FIG. 5B, a direction C from the processing reference line Y1 and a direction D from the processing reference line Y2 as shown in FIG. 5C. It is formed to have a symmetrical shape by being bent. Therefore, only one type of punching die is required, and the cost spent on the bending process can be minimized.

Next, the configuration of the length adjusting mechanism 10 will be described. After one of the engagement pieces 13 of the slide cover 11 connected to one of the bands 9 is bent in the direction B as shown in FIG.
The push plate 15 is inserted from the opening end opposite to the bent engagement piece 13 side so as to protrude outward. Then, the spring 16 is placed in the storage recess 21. After that, another push plate 15 is inserted into the slide cover 11 so that the spring 16 is positioned in the storage recess 21, and then the engagement piece 13 on the insertion side is bent. Thus, the pair of push plates 15 are slidably inserted into the slide cover 11 so as to sandwich the spring 16. At this time, the pair of push plates 15 are urged outward by the spring 16, and the pressing portion 20 protrudes from both ends of the opening, but the engaging piece 13 bent in the direction B engages with the locking concave portion 22. It regulates jumping out. Therefore, the locking pieces 23 provided on the pair of push plates 15 are held by the slide cover 11 and abut elastically in the widthwise direction of the band against the engagement recesses 19 provided on the inner wall surface 17A of the front cover 7. ing.

FIG. 6 shows a method of adjusting the length of the band by the length adjusting mechanism 10 according to the present invention constructed as described above.
This will be described with reference to FIGS. First, adjust the length of the band slightly longer than your wrist. To make the length of the band just fit on the wrist, see FIG.
As shown in FIG. 6A and FIG. 6B, the push plate 15 is locked in the engagement recess 19 of the front cover 7 by pushing one of the bands 9 in the direction of E against the urging force of the spring 16. The slide piece 11 moves inward in the storage portion 12 of the slide cover 11 along the inclined surface 23 a of the locking piece 23. Next, when one of the bands 9 is further pushed in the direction of E, the slide portion 10B moves on the inner wall surface 17A of the side wall 17 of the front cover 7 as shown in FIG. At this time, since the pressing portion 20 is fitted in the guide groove 18, the sliding portion 10B does not deviate from the front cover 7. Then, as shown in FIG. 6 (d), the locking pieces 23 are engaged and locked in the appropriate engaging recesses 19, so that the band just fits the wrist. In order to release the engagement state, the pressing portions 20 of the pair of push plates 15 are pressed with fingers to release the locking pieces 23 from the engagement recesses 19 and release the engagement. In order to move the band in the opposite direction, after pressing the pressing portion 20 to release the engagement as described above, the retaining piece 23 is moved while maintaining the state, and the other engaging concave portion 19 is moved. Can be engaged with.

Further, the pair of push plates 15 shown in FIG. 7 are provided such that the inclined surfaces 23b of the locking pieces 23 are symmetrically provided so as to face the above-mentioned inclined surfaces 23a.
Needless to say, it becomes possible by pulling one band 9. Therefore, detailed description is omitted.

[Second Embodiment] This embodiment is an improvement on the first embodiment. Therefore, the description of the same parts as those in the first embodiment will be omitted, and only the different parts will be briefly described. FIG. 8 is a perspective view of the front cover according to the second embodiment of the present invention as viewed from the back surface. FIG. 9 is a perspective view of the slide portion.
0 is the same sectional view.

This embodiment differs from the first embodiment in the shape of the guide groove and the engagement recess of the guide portion 10A as shown in FIGS. In the guide portion 10A, a guide groove 28 is formed in the inner wall surface 17A of the opposite side wall 17 of the front cover 7, and a plurality of engagement recesses 29 are also formed in the guide portion 10A. Therefore, with the band attached, the guide portion 10A
Cannot be seen from outside. However, in order to simplify the processing, the guide groove 28 and the plurality of engagement recesses 29 may be holes penetrating the side wall 17.

Next, the slide portion 10B has a point that the pressing portion 20 of the guide portion 30 provided on the push plate 15 is shortened, and the locking piece 33 has a sloped surface 33a and a sloped surface 33b in a wedge shape. This is different from the first embodiment in the point. In the method of adjusting the length of the band according to the present embodiment, the guide piece 25 is engaged with the engagement recess 29 of the front cover 7 by pushing or pulling one of the bands 9 against the urging force of the spring 16. The engagement between the engagement recess 29 and the engagement piece 33 is released by sliding inward in the storage portion 12 of the slide cover 11 along the inclined surface 33a or the inclined surface 33b of the engagement piece 33,
The slide portion 10B moves on the inner wall surface 17A of the side wall 17 facing the front cover 7 to adjust the length of the band. At this time, since the guide portion 30 is fitted in the guide groove 28, the slide portion 10B does not deviate from the front cover 7.
Then, the locking pieces 33 are engaged and locked in the appropriate engaging recesses 29, and the band just fits the wrist. To release the engaged state, the band 9 is released by pushing or pulling the one band 9 against the urging force of the spring 16.

[Third Embodiment] This embodiment is an improvement on the second embodiment. Therefore, the description of the same parts as those of the second embodiment will be omitted, and only different parts will be described. FIG. 11A is a perspective view of the front cover according to the third embodiment of the present invention as viewed from the back, FIG. 11B is an enlarged view of a main part of FIG. 11A, and FIG. Perspective view of part, FIG.
(B) is a perspective view of the guide piece.

This embodiment is different from the second embodiment in the shapes of the guide groove and the engagement recess of the guide portion 10A. FIG.
As shown in FIGS. 1 (a) and 1 (b), the guide portion 10A of the length adjusting mechanism 10 has a guide groove 38 recessed in the inner wall surface 17A of the side wall 17 facing the front cover 7, and the guide groove 38 is provided.
A plurality of engaging recesses 39 having an uneven shape are integrally provided at the bottom of the rim. In order to further simplify the processing, the plurality of engagement recesses 39 may be holes penetrating the side wall 17.

On the other hand, as shown in FIGS. 12 (a) and 12 (b), the slide portion 10B is made up of a pair of guide pieces 35 having the same symmetrical shape as the slide cover 31 as the connecting member and the spring 16 as the elastic member. It is configured. The slide cover 31 is obtained by omitting the engagement pieces 13 of the slide cover 11 of the second embodiment. The spring 16 is disposed in the storage section 12 of the slide cover 31 so as to be sandwiched between the pair of guide pieces 35. The pair of guide pieces 35 includes a locking piece 33 having wedge-shaped inclined surfaces 33a and 33b at the outer ends, and a base 32. The locking pieces 33a and 33b are locked in the engagement recesses 39. The base 32 is fitted in the guide groove 38 and the inner end thereof is slidably inserted into the housing 12. Further, since the guide piece 35 of the present embodiment can be manufactured only by punching, the cost can be further reduced as compared with the push plate 15 of the first embodiment. The guide piece 35 may be formed of resin.

[Fourth Embodiment] This embodiment is a further simplification of the third embodiment, in which a spring 1 as an elastic member is used.
6 is abolished. The guide portion 10A is the same as in the third embodiment. Therefore, only the differences from the third embodiment will be described. FIG. 13A is a perspective view of a guide piece in a slide portion according to a fourth embodiment of the present invention, FIG. 13B is a perspective view of the slide portion, and FIG. FIG. 5 is a perspective view showing a sliding state of a guide piece to be moved.

As shown in FIG. 13 (a), a guide piece 40 made of a resin material has a locking piece 43 having wedge-shaped inclined surfaces 43a and 43b at both outer ends, a base 42, and elasticity at the center. The curved thin portion 41 is integrally formed. Then, as shown in FIG. 13B, the guide piece 40
It is stored in the storage section 12 of the slide cover 31. Further, the guide piece 40 is in a position where the thin portion 41 is deformed and slid as shown in FIG. 13C during use, and the locking piece 43 is locked in the engagement recess 39 of the slide cover 31. 13C is restored to the shape shown by the imaginary line in FIG.

[Fifth Embodiment] This embodiment is a modification of the above-described embodiment. 14 is a partially omitted perspective view of the fifth embodiment of the present invention, FIG. 15A is a perspective view showing a direction in which the band is shortened, and FIG. 15B is a view showing a direction in which the band is shortened. It is a perspective view.

In this embodiment, as shown in FIG. 14, the length adjusting mechanism 10 comprises a guide portion 10A and a slide portion 10B as in the above embodiment. The guide portion 10A is formed by a side wall 52 of a slide plate 51 having a substantially U-shaped cross section.
A guide groove 58 and a plurality of engagement holes 59 are formed in one end, and one band 9 is rotatably connected via a connection pin 8 to a connection hole 51 a provided in the other end of the slide plate 51. On the other hand, the slide portion 10B is formed on the side wall 17 of the front cover 7 by, for example, press working, etc.
a and 53b are provided so as to protrude. The locking piece 53 has a slight elasticity in the lateral direction of the band.
When the guide portion 10A is inserted into the slide portion 10B from the other end in the longitudinal direction of the band against the elasticity of the locking piece 53, the locking piece 53 is engaged and locked in the engaging recess 59.

Next, as shown in FIG. 15 (a), by pushing one of the bands 9 in the direction F, the accessory becomes shorter. Further, as shown in FIG. 15B, by pulling one of the bands 9 in the direction G, the jewelry becomes longer and fits just to the wrist. In each of the above-described embodiments, a three-fold clasp is used, but it goes without saying that a two-fold clasp may be used.

As is apparent from the above, according to the length adjusting mechanism of the present invention, the following effects are obtained. In the first embodiment, fine adjustment can be performed without pressing the push plate in at least one direction.Therefore, when the band is loosely attached and then just fit to the arm or when the band is removed, the band is slightly removed. In a case where the band is detached after loosening the band to allow a sufficient length, the operation of adjusting the length of the band becomes easy. Furthermore, according to the second, third, fourth, and fifth embodiments, the length adjustment operation can be performed without pressing the push plate until the band just fits in the delicate thickness difference of the wrist before and after the morning and evening or before and after exercise. And operability is improved. Further, since a pressing member for performing a push operation is not required, and no member is exposed from the front cover, the appearance quality including the design is improved. Further, since there is no pressing portion protruding from the front cover, a malfunction due to an external impact can be prevented. In addition, since most parts constituting the length adjusting mechanism including the locking pieces are formed by sheet metal processing or resin molding, the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a perspective view of the front cover viewed from the back.

FIG. 4 is a perspective view of the slide unit.

FIG. 5A is a developed perspective view of the guide piece.
(B), (c) is a bending process drawing of the same guide piece.

FIGS. 6 (a), (b), (c) and (d) are operation diagrams of the same length adjusting mechanism.

FIG. 7 is a perspective view in which the position of the inclined surface of the locking piece of the push plate is changed.

FIG. 8 is a perspective view of a front cover according to a second embodiment of the present invention as viewed from the back surface of the front cover.

FIG. 9 is a perspective view of the slide unit.

FIG. 10 is a sectional view of the same.

FIG. 11A is a perspective view of the front cover according to the third embodiment of the present invention as viewed from the back surface of the front cover. (B) is the same as FIG.
FIG.

FIG. 12A is a perspective view of a slide unit. (B)
Is a perspective view of a guide piece.

FIG. 13A is a perspective view of a guide piece in a slide portion according to a fourth embodiment of the present invention. (B) is a perspective view of the slide unit. (C) is a perspective view showing a sliding state of the guide piece in the slide cover.

FIG. 14 is a perspective view of a guide piece in a sliding portion according to a fifth embodiment of the present invention.

FIG. 15A is a perspective view showing a direction in which the band is shortened. (B) is a perspective view showing a direction in which the band is elongated.

FIG. 16 is a perspective view showing a conventional band length adjusting mechanism.

FIG. 17 is a partially omitted cross-sectional view showing a length adjustment mechanism of the band.

[Explanation of symbols]

Reference Signs List 1 outer plate 2, 4, 6, 8 connecting pin 3 other band 5 middle plate 7 front cover 9 one band 10 length adjustment mechanism 10A guide portion 10B slide portion 11, 31 slide cover 12 storage portion 13 engagement piece 14 Connecting portion 15 Push plate 16 Spring 17 Side wall 18 Guide groove 19 Engagement concave portion 20 Pressing portion 21 Storage concave portion 22 Locking concave portion 23, 33, 43 Locking piece 23a, 23b, 33a, 33b, 43a, 43b Inclined surface 25, 35 , 40 guide pieces

Claims (9)

[Claims] 1. A guide groove with a locking portion for finely adjusting the length of a band is provided on both side walls of a front cover of a two-folded clasp or a three-folded clasp. A locking piece is urged toward a guide groove in a connecting member connected to the distal end, and the locking piece is inserted into the guide groove to engage the locking piece with the engaging recess. In a band length adjusting mechanism for changing a position where a stop piece and an engagement recess engage with each other to change a length of the band, a sliding piece is provided on the locking piece so as to be inclined toward a front end in the short side direction of the band. A length adjusting mechanism having a dynamic inclined portion. 2. A locking piece discharges elastically inward on both sides of the front cover of a two-folded clasp or a three-folded clasp, and is connected to the tip of one of the bands. The connecting member has a guide groove with a locking portion for finely adjusting the length of the band, the locking piece is inserted into the guide groove, and the locking piece is engaged with the engagement concave portion. In the band length adjusting mechanism that changes the position where the stop piece and the engagement recess engage with each other to change the length of the band, the locking piece has a sliding slope that slopes toward the guide groove. A length adjusting mechanism provided. 3. A push plate that moves in conjunction with the locking piece is provided on the locking piece to operate the engagement of the locking piece with the locking portion,
2. The length adjusting mechanism according to claim 1, wherein a part of the push plate penetrates through the front cover, and the engagement between the locking piece and the locking portion is released by pressing the push plate. . 4. The length adjusting mechanism according to claim 3, wherein the locking piece and the push plate are integrated. 5. The shape of the locking piece is such that one side surface is directed toward the guide groove so that the engagement position between the locking piece and the locking portion can be changed without operating the push plate in one direction. 4. The length adjusting mechanism according to claim 3, wherein a gentle slope is formed, and the other side surface becomes a steep slope toward the guide groove. 6. The length adjusting mechanism according to claim 1, wherein the shape of the locking piece is a wedge shape toward the tip. 7. The length adjusting mechanism according to claim 1, wherein the plurality of locking portions provided in the guide groove are formed of holes. 8. The length adjusting mechanism according to claim 1, wherein the locking piece is held in the connecting member and is in contact with the front lid by a spring. 9. The length adjusting mechanism according to claim 1, wherein the locking piece is held in the connecting member and is elastically pressed against the guide groove.