JPH07327714A - Double lock type bifoldable intermediate retainer for watch band - Google Patents

Abstract

PURPOSE:To prevent a locking part from being worn and to exhibit an advantage owned by a non-nickel material by making either a snap pawl or a locking shaft of a material different from a non-nickel material, and by making either a locking part or a locked part of a material different from a non-nickel material. CONSTITUTION:A bifoldable intermediate retainer A1 has a locking shaft made of a non-titanium material such as a stainless steel material. Accordingly, even though a snap pawl 20 is made of a titanium material, both snap pawl 18 and locking shaft 18 are never worn under several repetitions of engagement and disengagement even though the snap pawl 20, and no detrimental affection occurs throughout the engaging and locking action. Even though a locking hole part 26 is simply formed in a side wall 15a of a titanium lock cover member 15, since a locking protrusion 18a adapted to be engaged in the hole 26 is made of a stainless steel material, both are never worn similarly even under several repetitions of engagement and disengagement, and no detrimental affection occurs throughout the engaging and disengaging action.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to non-nickel materials such as pure titanium materials, titanium alloy materials (in the present specification, pure titanium materials and titanium alloy materials are simply referred to as titanium materials), ferrites. The present invention relates to a double-lock double-fold type Nakadome for a watch band using a stainless steel material.

[0002]

[Related Art] As a double lock type double folding type Nakadome for a watch band, a plate type and a Muku type structure are known. This double-lock type two-fold type Nakadome for a watch band has one more lock section than the single-lock type two-fold type Nakadome, so it is steadily attached to the lock and the lock mechanism is easily clipped to form a watch band. There is no accident such as falling off from the arm, and it is suitable for use.

The conventional watch band and the two-fold type Nakadome for watch band are mainly made of a stainless steel material containing a nickel component. The nickel component contained in this stainless steel material is
The problem is that it causes problems such as skin burns on the wristwatch wearing part, and recently there is a non-nickel (no nickel component or only a trace amount) material for the watch band and the two-fold type for watch bands. Tomes are manufactured.

Examples of the non-nickel material include titanium materials, YUS-190 [trade name of ferritic stainless steel manufactured by Nippon Steel Corporation], SUS-444,
Ferritic stainless steel materials such as SUS-445 are used. Among them, the titanium material has the advantages of being lightweight and excellent in corrosion resistance and durability, but has the drawback of being difficult to process. In particular, when the titanium materials contact each other, the contact portions are abraded, so that the lock mechanism portion cannot be formed of only the titanium material, which is difficult to put into practical use.

The double-lock double-fold type Nakadome for a watch band has a locking mechanism, that is, a locking contact portion at two places, so that it is extremely difficult to manufacture it using a titanium material, and there has been a practical one in the past. There wasn't.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. It is made of a non-nickel material, particularly a titanium material, without causing wear of a lock mechanism portion, that is, a locking portion. It is an object of the present invention to provide a double lock type two-fold type center clasp for a watch band that is capable of fully exerting its advantages.

[0007]

In order to solve the above-mentioned problems, the present invention is rotatably connected to a joint member which can be folded in two and a locking shaft provided at one end of the joint member. An upper cover member and a lock lid member that is rotatably connected via a support shaft provided at the other end of the joint member, and a snap claw formed on the joint member is used as the locking shaft. Double-lock double-fold type clasp for watch bands using a non-nickel material that locks, and then locks the locking part provided on the lock lid member with the locked part provided on the upper cover member. In addition, one of the snap claw and the locking shaft is formed of a material different from the non-nickel material used, and one of the locking portion and the locked portion is the non-nickel material used. It is made of a material different from It is.

The locking lid member may be provided with a locking projection, the upper cover member may be provided with a locking recess or a hole, and the locking projection may be formed of a material different from the non-nickel material used. it can.

The upper cover member may be provided with a locking projection, the lock lid member may be provided with a locking recess or hole, and the locking projection may be formed of a material different from the non-nickel material used. it can.

The joint member comprises an upper joint member that is connected to the upper cover member via a locking shaft, and a lower joint member that is rotatably connected to the upper joint member. The lower joint member is formed on the lower joint member. And a structure in which the snap claw is locked to the locking shaft from the inside of the locking shaft, and either the snap claw or the locking shaft is made of a material different from the non-nickel material used. .

As the different material different from the non-nickel material, a stainless steel material (whether containing nickel or not containing nickel) is preferably used, but other metal materials may be used, and a plastic material such as, for example, An engineering plastic material such as a fluororesin, a polyamide resin, or a polyacetal resin, a ceramic material, or the like can also be used.

When a pure titanium material is used as the non-nickel material, a titanium alloy material can be used as a different material, and conversely, when a titanium alloy material is used as the non-nickel material, It is also possible to use a pure titanium material as the different material. Among these combinations, it is most preferable to use a different material, stainless steel, for a non-nickel material, titanium material.

[0013]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 4, a double-lock double-folding type clasp A1 for a watch band according to the present invention has one end which is slightly curved upward and is connected to one watch band B1 via a support shaft 11. The upper cover member 12 is shaped, and one end is connected to the other end of the upper cover member 12 via a locking shaft 18, and the other end is connected to the other watch band B2 via a support shaft 13. It has a joint member 14 that can be folded in two and a lock lid member 15 that is connected to the other end of the joint member 14 via a support shaft 13.

The joint member 14 is connected to the upper cover member 12 via a locking shaft 18, and the lower joint member is connected to the timepiece band B2 and the lock lid member 15 via a support shaft 13. 14b and. The upper joint member 14a and the lower joint member 14b are rotatable with respect to each other via a rotary shaft 16 and have a slightly curved shape like the cover member 12 so as to be in close contact with each other in a folded state. ing.

The upper joint member 14a is rotatably attached to the upper cover member 12 via a locking shaft 18 at one end thereof. In the vicinity of the other end of the lower joint member 14b,
The snap claws 20, 20 are provided so as to project upward. Reference numeral 23 denotes an outward engaging recess provided on the snap claw 20, which is formed to face outward so as to engage the engaging shaft 18 from the inside. The direction of the locking recess 23 of the snap claw 20 may be outward or inward, but when it is outward, the locking shaft 18 is locked from the inside, so that the engagement state is reliable. There is.

Therefore, the locking shaft 18 has locking projections 18a, 18a formed by laterally projecting end portions from the left and right side walls 12a, 12a of the upper cover member 12. Two
Reference numerals 6 and 26 denote left and right side walls 15a, 1 of the lock lid member 15.
5a is a locking hole formed in the locking protrusions 18a, 18
It is provided at a position corresponding to a.

The lock cover member 15 is attached to the upper cover member 12
The locking projections 18a, 18a are locked in the locking holes 26, 26 by pressing the upper surface of the lock lid member 1
5 is locked and locked on the upper surface of the upper cover member 12 in a close contact state (FIGS. 2 and 4).

In this embodiment, the locking shaft 18 is made of a non-titanium material such as stainless steel, and the other members are made of titanium material.

With the above construction, the upper joint member 14a and the lower joint member 14b are folded in two, and the snap claw 20 is snap-locked to the locking shaft 18 from the inside.
Then, the lock lid member 15 is pressed against the upper surface of the upper cover member 12 to lock the locking projection 18a to the locking projection 26. As shown in FIGS.
5, the upper cover member 12, the upper joint member 14a and the lower joint member 14b are overlapped and closed, the ends of the watch bands B1 and B2 are in close proximity to each other, and the wristwatch (not shown) can be worn on the wrist. To do.

When the lock lid member 15 is pulled away from the upper cover member 12 in the above-mentioned closed state, the engagement state between the locking projection 18a and the locking hole portion 26 is released, and then the snap. When the claw 20 is pulled away from the locking shaft 18 to release the engagement state (FIGS. 1 and 3),
The lock lid member 15, the upper cover member 12, the upper joint member 14a, and the lower joint member 14b are arranged linearly and are in an open state. In this state, the ends of the watch bands B1 and B2 are separated from each other, and the wristwatch (not shown) can be removed from the wrist.

The characteristic of the double folding type clasp A1 for a watch band of this embodiment is that the locking shaft 18 is made of a non-titanium material, for example, a stainless steel material, and the end portion of the locking shaft 18 is lateral. The locking projections 18a and 18a are formed by projecting the projections. Therefore, even if the snap claw 20 is made of a titanium material, since the engagement shaft 18 to be engaged with the snap claw 20 is made of a stainless steel material, the snap claw 20 does not wear at all even if it is repeatedly engaged and disengaged. There is no adverse effect on the engagement locking action.

Further, even if the locking hole portion 26 is only opened to the side walls 15a, 15a of the lock lid member 15 made of titanium material, the locking protrusion 26 which engages with the locking hole portion 26. Since the parts 18a, 18a are made of stainless steel, they do not wear at all even if they are repeatedly engaged and disengaged, and their engagement locking action is not adversely affected.

As the engaging shaft 18, a spring rod, a cuff pin, a step pin, a pipe, a spring plate, or the like can be used.

In the above embodiment, the locking holes 26 are provided in the side walls 15a, 15a of the lock lid member 15, and the locking projections 18 are provided.
An example has been shown in which the ends a of the locking shaft 18 of the upper cover 12 are projected from the side walls 12a 12a.

Contrary to the embodiment described above, the upper cover member 1
It is also possible to adopt a configuration in which locking holes are formed in the side walls 12a and 12a of the second lock 12, and locking projections 28 are provided to project from the side walls 15a and 15a of the lock lid member 15. In this case, as shown in FIGS. 5 and 6, a through hole 34 is opened in the side wall 15a of the lock lid member 15 made of titanium material. This through hole 34 is
A large-diameter portion 36 is formed on the inner side, a small-diameter portion 38 is formed on the central portion via a step 40, and the outer-side portion is formed as a large-diameter opening 42.

Reference numeral 44 is a non-titanium material forming the locking projection 28, for example, a locking projection material made of stainless steel,
It has a structure in which a large-diameter expanded portion 46 formed at the base end portion and a small-diameter insertion portion 48 that forms the distal end portion from the central portion are continuously provided via a locking step portion 50. The locking protrusion material 44 is inserted into the through hole 34, the tip of the small diameter insertion portion 48 is extended to the large diameter opening portion 42, and this is caulked (FIG. 6) to form a caulking fixing portion 52. It is preferable that the locking projection material 44 is inserted and fixed in the through hole 34 to form the locking projection 28.

With this structure, even if the locking projection 28 is pressed from the inside to the outside at the time of engagement, since the locking step 50 is engaged with the step 40, the pressing force is It is received by the side wall 15a of the lock lid member 15, and there is no possibility that the locking projection material 44 will fall out of the through hole 34.

In the above embodiment, the locking hole portion 26 is illustrated as the locked portion for receiving the locking projections 18a, 18a, but the shape of this locked portion is such that it can receive the locking projection 18a. Needless to say, the same effect can be achieved even if the locking recess is a good one.

In the above embodiment, two snap claws 20 are provided, and the snap claws 20 are locked to the locking shaft 18 from the inside. However, the double lock for the watch band shown in FIGS. 7 to 9 is shown. As in the case of the two-fold type Nakadome A2, the number of the snap claws 20 may be one and the locking shaft 18 may be locked from the outside.

In the embodiment shown in FIGS. 1 to 4, the snap claws 20, 20 are made of a titanium material, the locking shaft 18 is made of a stainless steel material, and the snap claws 20 are provided at both ends of the locking shaft 18. , 20 are locked, and the end of the titanium splicing material 14a is wound around and fixed to the center of the locking shaft 18.

On the other hand, in the embodiment shown in FIGS. 7 to 9, the snap claw 20 is spot-welded with a spring plate made of a stainless steel material at the end of the lower joint material 14b, and the snap claw 20 is made of a titanium material. It is locked to the locking shaft 18.

The snap claw 20 is made of titanium material,
The locking shaft 18 may be made of stainless steel material.
In this case, the locking shaft 18 and the upper joint member 14a may be brazed and welded.

In the above-mentioned two embodiments, the double lock type two-fold type Nakadome A for the Muku type watch band is used.
1 and A2 have been described, the structure of the present invention can be applied to a double lock type double folding type clasp A3 for a plate type watch band, and examples thereof are shown in FIGS.
Shown in.

In this case, the snap claw 20 is structured so as to be locked to the locking shaft 18 from the inside, and the lock lid member 15 is also provided.
Similarly, locking holes 26 are formed in the side walls 15a, 15a. The structure of the locking projection is such that the support shaft 11 connecting the upper cover member 12 and the watch band B1 is attached to the upper cover material 12
The side walls 12a, 12a of the
It is different from the above-described embodiment in that it is formed by forming a and 11a. However, the action is similar.

In this case, the snap claw 20 is made of titanium material and the locking shaft 18 is made of stainless steel, or conversely, the locking shaft 18 is made of titanium material and the snap claw 20 is made of stainless steel material. It should be made.
At the same time, the support shaft 11 is made of a stainless steel material, and the locking projections 11 are provided in the locking holes 26 made of a titanium material.
A and 11a are locked.

As long as it is a double lock type two-fold type Nakadome for a watch band having a mechanism of snap-locking the snap claw 20 to the locking shaft 18 and lock-locking the lock lid member 15 to the upper cover member 12, it is any type. It goes without saying that the mechanism of the present invention can be applied to any type or modification.

In each of the above embodiments, the titanium material was used as the non-nickel material, and stainless steel was used as the different material, but YUS-190 [Nippon Steel Corporation] was used as the non-nickel material. Product name of ferritic stainless steel], SUS-44
4, a ferritic stainless steel material such as SUS-445, a ceramic material, or the like may be used. As the different material, other than stainless steel material, other metal material, plastic material such as fluororesin, polyamide resin, polyacetal resin Engineering plastic materials such as, ceramic materials and the like can be used.

When a pure titanium material is used as the non-nickel material, a titanium alloy material can be used as the different material, and conversely, when a titanium alloy material is used as the non-nickel material, It is also possible to use a pure titanium material as the different material.

[0040]

As described above, according to the double lock type double folding type clasp of the present invention for the watch band, the lock mechanism portion, that is, the locking portion is not worn away, and the non-nickel material, particularly the titanium material. There is an effect that the advantage of can be fully exhibited.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention showing a double-lock double-folding type clasp for a watch band in an open state.

FIG. 2 is a perspective view of an embodiment showing a double-lock double-fold type clasp for a watch band of the present invention in a closed state.

3 is a cross-sectional explanatory diagram of FIG.

4 is a cross-sectional explanatory view of FIG.

FIG. 5 is a cross-sectional explanatory view showing an example of a method of forming a locking projection.

6 is a cross-sectional explanatory view showing a state in which the lower end portion of the locking projection material is caulked from the state of FIG.

FIG. 7 is a perspective view of another embodiment of the present invention showing the double-lock double-fold type clasp for a watch band in an open state.

8 is a cross-sectional explanatory view of FIG.

FIG. 9 is a cross-sectional explanatory view showing a state in which the double-lock double-fold type clasp for watch bands of the present invention is closed from the state of FIG.

FIG. 10 is a perspective view of another embodiment of the present invention showing the double-lock double-fold type clasp for a watch band in an open state.

FIG. 11 is a perspective view of another embodiment of the present invention showing the double-lock double-fold type clasp of the present invention in a closed state.

12 is a cross-sectional explanatory diagram of FIG.

13 is a cross-sectional explanatory diagram of FIG.

[Explanation of symbols]

11 Support Shaft 12 Upper Cover Member 12a Side Wall of Upper Cover Member 13 Spindle 14 Joint Member 14a Upper Joint Member 14b Lower Joint Member 15 Lock Lid Member 15a Side Wall of Lock Lid Member 16 Rotating Shaft 18 Locking Shafts 18a, 28 Locking Projection 20 Snap claw 23 Locking recess 26 Locking hole 34 Through hole 36 Large part 38 Small diameter part 40 Step part 42 Large opening 44 Locking projection material 46 Expanding part 48 Small diameter insertion part 50 Locking Step 52 Fixed part A1, A2, A3 Double lock type double folding type for watch band Nakadome B1, B2 Watch band

Claims (5)

[Claims] 1. A foldable joint member, an upper cover member rotatably connected via a locking shaft provided at one end of the joint member, and an other end portion of the joint member. A lock lid member rotatably connected via a support shaft, a snap claw formed on the joint member is locked to the locking shaft, and then a locking portion provided on the lock lid member. Is a double lock type two-fold type clasp for a watch band that uses a non-nickel material that locks to a locked portion provided on the upper cover member, and one of the snap claw and the locking shaft is A double for a watch band, characterized in that it is formed of a material different from the used non-nickel material, and one of the locking portion and the locked portion is formed of a material different from the used non-nickel material. Lock type two-fold type Nakadome. 2. The locking lid material is provided with a locking projection, the upper cover member is provided with a locking recess or hole, and the locking projection is made of a material different from the non-nickel material used. The double lock type two-fold type clasp for watch bands according to claim 1, characterized in that. 3. The upper cover member is provided with a locking projection, the lock lid member is provided with a locking recess or hole, and the locking projection is made of a material different from the non-nickel material used. The double lock type two-fold type clasp for watch bands according to claim 1, characterized in that. 4. The joining member comprises an upper joining member that is connected to the upper cover member via a locking shaft, and a lower joining member that is rotatably connected to the upper joining member. It has a structure in which the formed snap claw is locked to the locking shaft from the inside of the locking shaft, and one of the snap claw and the locking shaft is made of a material different from the non-nickel material used. The double lock type two-fold type clasp for watch bands according to any one of claims 1 to 3, which is formed. 5. The non-nickel material is a titanium material, and the material different from the non-nickel material used is a stainless steel material.
A double lock type two-fold type Nakadome for a watch band according to any one of to 4.