JP2010035960A - Band attaching structure of wrist-watch case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a band attaching structure of a wrist watch case which can prevent an attaching hole from being damaged even if a wrist watch case is formed of a flexible material, can surely fix a watch band, and also can prevent a cylindrical component from missing. <P>SOLUTION: The wrist watch case 1 is formed of the flexible material, and an attaching hole 3b is provided in the band attaching portion 3 of the wrist watch case 1. A metallic reinforcing tube 5, into which an end of a spring bar is inserted, is attached by being press-fitted into the attaching hole 3b, and a projection 5a as a safety lock is provided in the reinforcing tube 5. Accordingly, the end of the spring bar can be surely and tightly fixed to the attaching hole 3b of the band attaching portion 3 by means of the metallic reinforcing tube 5. Thus, damage to the attaching hole 3b can be prevented even if the wrist watch case 1 is formed of the flexible material. Further, the projection 5a as a safety lock prevents the reinforcing tube 5 from coming off from the attaching hole 3b, and also prevents the reinforcing tube 5 from missing. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a band attachment structure for a watch case in which a watch band is attached to a watch case with a spring bar.

Conventionally, in a wristband mounting structure for a wristwatch case, as described in Patent Document 1, a wristwatch case is formed of a synthetic resin, a band mounting portion is formed integrally with the wristwatch case, and the wristwatch case is attached to the band mounting portion. When attaching the band with the spring bar, insert the metal reinforcement cap into the attachment hole provided in the band attachment part, and insert the end of the spring bar into this reinforcement cap, so that the attachment hole of the band attachment part is Those configured to prevent destruction by a spring bar are known.
Shokai 57-107419

  However, in such a conventional band mounting structure, only a metal reinforcing cap is inserted into the mounting hole of the band mounting portion, so the end of the spring bar is removed from the band mounting portion of the watch case. When replacing the band, there is a problem that the reinforcing cap is easily detached from the mounting hole of the band mounting portion and the reinforcing cap is easily lost.

  The problem to be solved by the present invention is that even if the watch case is made of a soft material, the mounting hole can be prevented from being damaged, the watch band can be securely fixed, and the cylindrical member can be prevented from being lost. It is to provide a band mounting structure for a wristwatch case.

In order to solve the above problems, the present invention includes the following components.
According to the first aspect of the present invention, there is provided a wristwatch case band mounting structure in which a watch band is attached to a band mounting portion of a wristwatch case made of a soft material by a spring bar, and the spring is mounted in a mounting hole formed in the band mounting portion. A wristband mounting structure for a watch case, wherein a metal cylindrical member into which an end of a rod is inserted is attached by press-fitting and a retaining portion is provided on the cylindrical member.

  According to a second aspect of the present invention, the retaining portion is a protruding portion provided to protrude toward an outer peripheral side of an end portion of the cylindrical member positioned in the outer direction of the mounting hole. The wristwatch case band mounting structure according to claim 1.

  According to a third aspect of the present invention, in the state where the protruding portion is inserted into the mounting hole of the band mounting portion, the end portion of the cylindrical member positioned in the outer direction of the mounting hole is provided. 3. The wristwatch case band mounting structure according to claim 2, wherein the wristwatch case band mounting structure is formed by spreading with a spreading tool.

  The invention according to claim 4 is the wristwatch according to claim 1, wherein the retaining portion is a protruding portion provided on the outer peripheral surface of the cylindrical member so as to protrude toward the outer peripheral side. This is a case band mounting structure.

The invention according to claim 5 is a wristwatch case band mounting structure in which a watch band is attached to a band mounting portion of a wristwatch case made of a soft material by a spring bar, and is attached to a mounting hole formed in the band mounting portion. A slit groove is formed in the metal cylindrical member into which the end portion of the spring bar is inserted along the axial direction, and the cylindrical member is provided with an elastic force by the slit groove, and the cylindrical force is generated by the elastic force. A wristband mounting structure for a watch case, characterized in that a ring-shaped member is fixed in contact with the inner surface of the mounting hole.

According to a sixth aspect of the present invention, there is provided a wristwatch case band mounting structure in which a watch band is attached to a band mounting portion of a wristwatch case made of a soft material by a spring bar. A wristwatch case comprising: a metal cylindrical member into which an end of the cylindrical member is inserted by press-fitting; and a retaining portion for preventing the tubular member from coming off at an edge of the mounting hole. This is a band mounting structure.

  The invention described in claim 7 is characterized in that the tubular member is provided with a hooking portion on which the key-shaped tool is hooked in a state where the tubular member is mounted in the mounting hole. The wristwatch case band mounting structure according to any one of claims 1 to 6.

  According to the present invention, when the watch band is attached to the band attaching portion of the watch case with the spring rod, the end of the spring rod provided on the watch band is securely attached to the attachment hole of the band attaching portion by the metal cylindrical member. Even if the watch case is made of a soft material, it can prevent the mounting hole from being broken by the spring bar, and when the watch band is replaced by removing the spring bar, it is cylindrical. It is possible to prevent the member from detaching from the mounting hole, thereby preventing the loss of the cylindrical member.

(Embodiment 1)
A first embodiment of a wristwatch case band mounting structure to which the present invention is applied will be described below with reference to FIGS.
The wristwatch case 1 is made of a soft material such as synthetic resin or aluminum, and as shown in FIG. 1, the upper side is formed in a substantially square shape, the lower side is formed in a substantially circular shape, and the whole is formed in a substantially frame shape. .

As shown in FIGS. 1 and 2, a band attaching portion 3 to which the watch band 2 is attached is integrally formed on both sides of the watch case 1 at the 12 o'clock side and the 6 o'clock side. As shown in FIGS. 1 and 2, the band mounting portion 3 is provided with mounting recesses 3a into which the band end portion 2a of the watch band 2 is inserted at the front end side, and mounting holes 3b on both sides of the mounting recess 3a. Are provided so as to face each other.

The watch band 2 is made of a synthetic resin such as urethane resin, and is configured such that the band end 2 a is inserted into the mounting recess 3 a of the band mounting portion 3 as shown in FIG. 2. An insertion hole 2 b into which the spring bar 4 is inserted is provided at the band end 2 a of the watch band 2. As shown in FIG. 3, the spring bar 4 is provided with a coil spring (not shown) in a cylindrical spring bar body 4a, and locking projections 4b on both sides of the spring bar body 4a. It is the structure attached in the state which protruded so that it could protrude by the spring force of a coil spring.

As shown in FIG. 2, the spring bar 4 has its spring bar body 4a inserted into an insertion hole 2b provided in the band end 2a of the watch band 2, and the locking projections 4b on both sides are connected to the watch band 2. The watch band 2 is protruded from both sides of the band end portion 2a by the spring force of the coil spring, and the protruding locking projections 4b are inserted into the mounting holes 3b of the band mounting portion 3 facing each other. It is configured to be attached to the attachment portion 3.

In this case, metal reinforcing pipes 5 are respectively provided in the mounting holes 3b of the band mounting portion 3 facing each other, as shown in FIGS. The reinforcing pipe 5 has an inner diameter that is substantially the same as or slightly larger than the outer diameter of the locking projection 4 b of the spring bar 4, and is positioned outward of the mounting hole 3 b of the band mounting portion 3. A protrusion 5a for retaining the protrusion is formed at the end so as to protrude toward the outer peripheral side.

The projecting portion 5a of the reinforcing pipe 5 is pressed from the end portion side (left end portion in FIG. 4) by inserting a conical spreading tool (see FIG. 7) having a tip such as a punch. When the hole diameter of the applied end is pushed wide, the outer peripheral edge of the end protrudes slightly toward the outer peripheral side. As shown in FIG. 4, when the reinforcing pipe 5 is press-fitted into the mounting hole 3b of the band mounting portion 3, the protruding portion 5a bites into the inner surface of the mounting hole 3b, thereby being firmly fixed in the mounting hole 3b. It is comprised so that.

According to such a band mounting structure of the wristwatch case 1, the mounting hole 3b is provided in the band mounting portion 3 of the wristwatch case 1, and the metal reinforcement in which the locking projection 4b of the spring bar 4 is inserted into the mounting hole 3b. Since the pipe 5 is attached by press fitting, when the watch band 2 is attached to the band attaching portion 3 of the watch case 1 with the spring bar 4, the locking protrusion 4b of the spring bar 4 provided in the insertion hole 2b of the watch band 2 is made of metal. The reinforcing pipe 5 made of steel can be securely and firmly fixed to the mounting hole 3b of the band mounting portion 3. For this reason, even if the wristwatch case 1 is formed of a soft material, it is possible to reliably prevent the mounting hole 3b from being broken by the locking projection 4b of the spring bar 4.

Further, according to the band mounting structure of the wristwatch case 1, the retaining projection 5a protrudes toward the outer peripheral side at the end of the reinforcing pipe 5 located in the outer direction of the mounting hole 3b of the band mounting portion 3. Since the protrusion 5a is inserted into the inner surface of the mounting hole 3b of the band mounting portion 3, the reinforcing pipe 5 is removed when the spring bar 4 is removed from the band mounting portion 3 and the watch band 2 is replaced. Can be prevented from detaching from the mounting hole 3b of the band mounting portion 3, thereby preventing the reinforcing pipe 5 from being lost.

(Embodiment 2)
Next, a second embodiment of a wristwatch case band mounting structure to which the present invention is applied will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS. 1-4.
This watch case 1 is made of a soft material such as synthetic resin or aluminum as in the first embodiment. As shown in FIG. 5, both sides of the 12 o'clock side and the 6 o'clock side (in FIG. 5, only a part of one side). The band attaching portion 3 is integrally formed.

Similar to the first embodiment, mounting holes 3b are provided on both side portions (only one side is shown in FIG. 5) of the mounting recess 3a provided on the distal end side of the band mounting portion 3. As shown in FIGS. 5 and 6, a metal reinforcing pipe 7 is fitted into the mounting hole 3b by press-fitting. The reinforcing pipe 7 has an inner diameter that is substantially the same as or slightly larger than the outer diameter of the locking protrusion 4b of the spring bar 4.

As shown in FIG. 6, this reinforcing pipe 7 is press-fitted into the mounting hole 3b, and as shown in FIG. 8 is inserted and pressed, and by slightly expanding the hole diameter of the pressed end, the outer peripheral edge of the end is slightly projected toward the outer peripheral side, and thereby the protrusion 7a for retaining is removed. It has a formed configuration. Thereby, as shown in FIG. 8, the reinforcement pipe 7 is configured to be firmly fixed in the attachment hole 3b by the protrusion 7a biting into the inner surface of the attachment hole 3b of the band attachment portion 3. .

Also in the band attachment structure of the wristwatch case 1, as in the first embodiment, a metal fitting into which the locking projection 4 b of the spring bar 4 is inserted into the attachment hole 3 b provided in the band attachment portion 3 of the wristwatch case 1. Since the reinforcement pipe 7 is attached by press-fitting, the locking projection 4b of the spring bar 4 provided in the insertion hole 2b of the watch band 2 is securely and firmly fixed to the attachment hole 3b of the band attachment portion 3 by the reinforcement pipe 7. be able to. For this reason, even if the wristwatch case 1 is formed of a soft material, it is possible to reliably prevent the mounting hole 3b from being broken by the locking projection 4b of the spring bar 4.

Further, in the band attachment structure of the wristwatch case 1, a spreading tool 8 having a conical tip such as a punch at the end located in the outer direction of the reinforcing pipe 7 press-fitted into the attachment hole 3 b of the band attachment portion 3. Since the protrusion 7a for retaining is protruded toward the outer peripheral side by inserting and pressing, the protrusion 7a is bitten into the inner surface of the mounting hole 3b of the band mounting portion 3. Can do. For this reason, it is possible to prevent the reinforcement pipe 7 from being detached from the attachment hole 3b of the band attachment portion 3 when the watch band 2 is replaced, as in the first embodiment, thereby preventing the reinforcement pipe 7 from being lost. Can do.

(Embodiment 3)
Next, a third embodiment of a wristwatch case band mounting structure to which the present invention is applied will be described with reference to FIGS. Also in this case, the same portions as those in the first embodiment shown in FIGS.
This watch case 1 is also formed of a soft material such as synthetic resin or aluminum, as in the first embodiment, and both sides of the watch case 1 at the 12 o'clock side and the 6 o'clock side (parts on one side in FIG. 9). As shown in FIG. 9, the band mounting portion 3 is integrally formed.

As in the first embodiment, mounting holes 3b are provided on both side portions (only one side is shown in FIG. 9) of the mounting recess 3a provided on the distal end side of the band mounting portion 3. As shown in FIG. 10, a metal reinforcing pipe 10 is fitted into the mounting hole 3b by press-fitting. As shown in FIG. 9, the reinforcing pipe 10 is formed with a mountain-shaped protrusion 10 a projecting toward the outer peripheral side at a predetermined position on the outer peripheral surface. As a result, as shown in FIG. 10, when the reinforcing pipe 10 is press-fitted into the mounting hole 3b of the band mounting portion 3, the protruding portion 10a bites into the inner surface of the mounting hole 3b, so that the reinforcing pipe 10 is firmly inserted into the mounting hole 3b. It is configured to be fixed.

Also in the band attachment structure of the wristwatch case 1, as in the first embodiment, a metal fitting into which the locking projection 4 b of the spring bar 4 is inserted into the attachment hole 3 b provided in the band attachment portion 3 of the wristwatch case 1. Since the reinforcing pipe 10 is attached by press fitting, the locking projection 4b of the spring bar 4 provided in the insertion hole 2b of the watch band 2 is securely and firmly fixed to the attaching hole 3b of the band attaching portion 3 by the reinforcing pipe 10. be able to. For this reason, even if the wristwatch case 1 is formed of a soft material, it is possible to reliably prevent the mounting hole 3b from being broken by the locking projection 4b of the spring bar 4.

Further, in the band mounting structure of the wristwatch case 1, the retaining projection 10a protrudes toward the outer peripheral side at a predetermined position on the outer peripheral surface of the reinforcing pipe 10 press-fitted into the mounting hole 3b of the band mounting portion 3. Therefore, the protrusion 10 a can be bitten into the inner surface of the attachment hole 3 b of the band attachment portion 3. For this reason, it is possible to prevent the reinforcement pipe 7 from being detached from the attachment hole 3b of the band attachment portion 3 when the watch band 2 is replaced, as in the first embodiment, thereby preventing the reinforcement pipe 10 from being lost. Can do.

(Embodiment 4)
Next, a fourth embodiment of a wristwatch case band mounting structure to which the present invention is applied will be described with reference to FIGS. Also in this case, the same portions as those in the first embodiment shown in FIGS.
This watch case 1 is also made of a soft material such as synthetic resin or aluminum, as in the first embodiment, and both sides of the watch case 1 on the 12 o'clock side and 6 o'clock side (in FIG. 11, a part of one side). As shown in FIG. 11, the band attaching portion 3 is integrally formed.

As in the first embodiment, mounting holes 3b are provided on both side portions (only one side is shown in FIG. 11) of the mounting recess 3a provided on the distal end side of the band mounting portion 3. As shown in FIGS. 12 and 13, a metal reinforcing pipe 12 is attached in the attachment hole 3b. As shown in FIG. 11, the reinforcing pipe 12 has slit grooves 12 a formed continuously at both ends along the axial direction, and the outer diameter thereof is larger than the inner diameter of the mounting hole 3 b of the band mounting portion 3. It has a formed configuration.

Accordingly, the reinforcing pipe 12 has an elastic force by the slit groove 12a, and is configured to be elastically contacted and fixed to the inner surface of the mounting hole 3b by this elastic force. That is, when the reinforcing pipe 12 is compressed so that its outer diameter is reduced against the elastic force, and is inserted into the mounting hole 3b of the band mounting portion 3 in this state, the elastic restoring force of the reinforcing pipe 12 itself Is configured to be elastically contacted and fixed to the inner surface of the mounting hole 3b.

In this case, as shown in FIG. 12, the reinforcing pipe 12 is configured to be inserted into the attachment hole 3 b of the band attachment portion 3 by the pipe insertion jig 13. That is, as shown in FIG. 12, the pipe insertion jig 13 includes a large-diameter hole 13a that is larger than the inner diameter of the mounting hole 3b, and a small-diameter hole 13b that is substantially the same as or slightly smaller than the inner diameter of the mounting hole 3b. A tapered hole portion 13c is provided between the large diameter hole 13a and the small diameter hole 13b for compression so that the outer diameter of the reinforcing pipe 12 is gradually reduced.

When the reinforcing pipe 12 is inserted into the attachment hole 3b of the band attachment portion 3 using the pipe insertion jig 13, as shown in FIG. 12, first, the small diameter hole 13b of the pipe insertion jig 13 is changed to the attachment hole 3b. Make it correspond. In this state, the reinforcing pipe 12 is inserted into the large-diameter hole 13a of the pipe insertion jig 13 and pushed toward the small-diameter hole 13b. At this time, the outer diameter of the reinforcing pipe 12 is gradually reduced by the tapered hole portion 13c located in the middle of the pipe insertion jig 13, and becomes elastically small.

Then, when the reinforcing pipe 12 whose outer diameter is reduced is further pushed in, the reinforcing pipe 12 is inserted into the small diameter hole 13b of the pipe insertion jig 13, and the reinforcing pipe 12 passes through the small diameter hole 13b, as shown in FIG. Is inserted into the mounting hole 3b. As described above, when the reinforcing pipe 12 is inserted into the mounting hole 3b, the reinforcing pipe 12 is restored by its own elastic force, and is fixed by being in close contact with the inner surface of the mounting hole 3b and elastically contacting it.

Also in such a band attachment structure of the watch case 1, a metal reinforcing pipe 12 into which the locking protrusion 4 b of the spring bar 4 is inserted is attached in the attachment hole 3 b provided in the band attachment portion 3 of the watch case 1. Therefore, as in the first embodiment, the locking projection 4b of the spring bar 4 provided in the insertion hole 2b of the watch band 2 is securely and firmly fixed to the mounting hole 3b of the band mounting portion 3 by the reinforcing pipe 12. Can do. For this reason, even if the wristwatch case 1 is formed of a soft material, it is possible to reliably prevent the mounting hole 3b from being broken by the locking projection 4b of the spring bar 4.

Further, in the band mounting structure of the wristwatch case 1, a slit groove 12 a is formed along the axial direction of the reinforcing pipe 12 mounted in the mounting hole 3 b of the band mounting portion 3, and an elastic force is applied to the reinforcing pipe 12. Therefore, when the compression pipe 12 is compressed so that the outer diameter of the reinforcement pipe 12 is reduced against the elastic force of the reinforcement pipe 12 by the slit groove 12a, and the reinforcement pipe 12 is inserted into the mounting hole 3b in this state. When the reinforcing pipe 12 is restored by its own elastic force, the reinforcing pipe 12 comes into close contact with the inner surface of the mounting hole 3b and elastically contacts.

For this reason, the reinforcing pipe 12 can be reliably fixed in the mounting hole 3b by the frictional resistance force caused by the elastic contact between the outer peripheral surface of the reinforcing pipe 12 and the inner peripheral surface of the mounting hole 3b. Similarly, when the spring bar 4 is removed from the band attaching portion 3 and the watch band 2 is exchanged, the reinforcing pipe 12 can be prevented from being detached from the attaching hole 3b of the band attaching portion 3. It can be prevented from being lost.

(Embodiment 5)
Next, a fifth embodiment of a wristwatch case band mounting structure to which the present invention is applied will be described with reference to FIGS. Also in this case, the same portions as those in the first embodiment shown in FIGS.
This watch case 1 is also formed of a soft material such as synthetic resin or aluminum, as in the first embodiment, and both sides of the watch case 1 on the 12 o'clock side and 6 o'clock side (in FIG. 14, a part of one side). As shown in FIG. 14, the band attaching portion 3 is integrally formed.

As in the first embodiment, mounting holes 3b are provided on both side portions (only one side is shown in FIG. 14) of the mounting recess 3a provided on the distal end side of the band mounting portion 3. As shown in FIG. 15, a metal reinforcing pipe 15 is press-fitted into the mounting hole 3b. In this case, the reinforcing pipe 15 is mounted in the mounting hole 3b in a state where the end portion positioned on the outer side is positioned inside the mounting hole 3b with respect to the outer peripheral edge of the mounting hole 3b.

As shown in FIGS. 16 and 17, the reinforcing pipe 15 is fixed in the mounting hole 3 b by a retaining portion 17 formed by crushing the outer peripheral edge of the mounting hole 3 b by the crushing jig 16. ing. That is, as shown in FIG. 16, the crushing jig 16 has a tip portion formed in a tapered portion 16a, and the tapered portion 16a is inserted into the mounting hole 3b so as to be pressed against the outer peripheral edge of the mounting hole 3b. The outer peripheral edge of the mounting hole 3b is crushed by the tapered portion 16a, and the retaining portion 17 is formed on the outer peripheral edge of the mounting hole 3b.

As shown in FIG. 17, the retaining portion 17 is formed so as to protrude toward the inner surface side of the mounting hole 3 b and abut against an end portion located in the outer direction of the reinforcing pipe 15, thereby press-fitting into the mounting hole 3 b. The reinforcing pipe 15 is configured so as to prevent the reinforcing pipe 15 from slipping out of the mounting hole 3b by pressing an end portion of the reinforcing pipe 15 positioned in the outer direction.

In this case, as shown in FIG. 17, the retaining portion 17 is formed such that the protruding length of the mounting hole 3 b toward the inner surface side is slightly shorter than the thickness of the reinforcing pipe 15. When the four locking protrusions 4b are inserted, the insertion of the locking protrusions 4b is not hindered. Further, as shown in FIG. 17, the retaining portion 17 is formed in a tapered shape in which the outside of the mounting hole 3b is wide and the inside is narrowed by being crushed by the taper portion 16a of the crushing jig 16.

Also in such a band attachment structure of the watch case 1, a metal reinforcement pipe 15 into which the locking protrusion 4 b of the spring bar 4 is inserted is attached in the attachment hole 3 b provided in the band attachment portion 3 of the watch case 1. Therefore, as in the first embodiment, the locking projection 4b of the spring bar 4 provided in the insertion hole 2b of the watch band 2 is securely and firmly fixed to the mounting hole 3b of the band mounting portion 3 by the reinforcing pipe 15. Can do. For this reason, even if the wristwatch case 1 is formed of a soft material, it is possible to reliably prevent the mounting hole 3b from being broken by the locking projection 4b of the spring bar 4.

Further, in the band mounting structure of the wristwatch case 1, a retaining portion 17 is provided on the outer peripheral edge of the mounting hole 3 b of the band mounting portion 3, and the reinforcement pipe is attached by press fitting into the mounting hole 3 b by the retaining portion 17. 15 is fixed, the reinforcing pipe 15 can be securely and firmly fixed in the mounting hole 3b without the reinforcing pipe 15 coming out of the mounting hole 3b. For this reason, when exchanging the watch band 2 as in the first embodiment, it is possible to prevent the reinforcing pipe 15 from being detached from the mounting hole 3b of the band mounting portion 3, thereby preventing the reinforcing pipe 15 from being lost. be able to.

In this case, the retaining portion 17 is formed such that the protruding length of the mounting hole 3b toward the inner surface is slightly shorter than the thickness of the reinforcing pipe 15, and the outside of the mounting hole 3b is wide and the inside is tapered. Therefore, when the locking protrusion 4b of the spring bar 4 is inserted into the reinforcing pipe 15, the locking protrusion 4b can be guided to the reinforcing pipe 15 by the tapered retaining portion 17. The locking protrusion 4b can be easily and reliably inserted into the reinforcing pipe 15.

In the fourth embodiment, the case where the retaining portion 17 is formed by crushing the outer peripheral edge of the mounting hole 3b by pressing the tapered portion 16a of the crushing jig 16 against the outer peripheral edge of the mounting hole 3b has been described. However, the present invention is not limited to this, and the retaining portion 17 may be formed by deforming the outer peripheral edge of the mounting hole 3b by ultrasonic welding or heat welding.

(Embodiment 6)
Next, with reference to FIGS. 18-21, Embodiment 6 of the band attachment structure of the watch case to which this invention is applied is demonstrated. Also in this case, the same portions as those in the first embodiment shown in FIGS.
This watch case 1 is also made of a soft material such as synthetic resin or aluminum, as in the first embodiment, and both sides of the watch case 1 on the 12 o'clock side and 6 o'clock side (in FIG. 18, a part of one side). As shown in FIG. 18, the band attaching portion 3 is integrally formed.

As in the first embodiment, mounting holes 3b are provided on both side portions (only one side is shown in FIG. 18) of the mounting recess 3a provided on the distal end side of the band mounting portion 3. As shown in FIG. 19, a metal reinforcing pipe 20 is fitted into the mounting hole 3b by press-fitting. The reinforcing pipe 20 is provided with a bottom plate portion 20a at an end located on the back side (right side in FIG. 18) of the mounting hole 3b, a key hole 20b is provided in the bottom plate portion 20a, and the bottom plate portion 20a is attached to the mounting hole. It is configured to be press-fitted into the mounting hole 3b in a state slightly separated from the back wall of 3b.

In this case, as shown in FIGS. 20 and 21, the key hole 20b of the reinforcing pipe 20 is configured such that the key tool 21 is caught in a state in which the reinforcing pipe 20 is mounted in the mounting hole 3b. This key-shaped tool 21 is for pulling out the reinforcing pipe 20 from the inside of the mounting hole 3b. As shown in FIGS. 20 and 21, a rod-shaped main body portion 22 to be inserted into the reinforcing pipe 20, and the main body portion. The hook part 23 provided in the front-end | tip of 22 and the grip part 24 provided in the other end part of the main-body part 22 are provided.

Accordingly, as shown in FIG. 20, the key-shaped tool 21 inserts the rod-shaped main body portion 22 into the reinforcing pipe 20, and the hook portion 23 at the tip thereof is a key hole provided in the bottom plate portion 20 a of the reinforcing pipe 20. The reinforcing pipe 20 can be taken out from the mounting hole 3b as shown in FIG. 21 when inserted into 20b and brought into contact with the outer surface of the bottom plate portion 20a. Has been.

Such a band attachment structure of the wristwatch case 1 has the same effects as those of the first embodiment. In addition, since the key hole 20b is provided in the bottom plate portion 20a of the reinforcing pipe 20, the attachment hole 3b of the band attachment portion 3 is provided. The reinforcement pipe 20 press-fitted into the mounting hole 3b can be easily taken out by the key tool 21. For this reason, when exchanging the watch band 2, even if the spring bar 4 is changed, it can be replaced with a reinforcing pipe 20 having a size corresponding to the spring bar 4.

(Embodiment 7)
Next, with reference to FIGS. 22-25, Embodiment 7 of the band attachment structure of the watch case to which this invention is applied is described. In this case, the same portions as those in the sixth embodiment shown in FIGS.
This watch case 1 is also made of a soft material such as a synthetic resin or aluminum, as in the first and sixth embodiments. Both sides of the watch case 1 at the 12 o'clock side and the 6 o'clock side (in FIG. As shown in FIG. 22, the band attaching portion 3 is integrally formed as shown in FIG.

Similar to the first and sixth embodiments, mounting holes 3b are provided on both side portions (only one side is shown in FIG. 22) of the mounting recess 3a provided on the distal end side of the band mounting portion 3. As shown in FIG. 24, a metal reinforcing pipe 25 is fitted into the mounting hole 3b by press-fitting. This reinforcing pipe 25 is provided with a notch 25a along the outer peripheral surface at the end located on the back side (right side in FIG. 23) of the mounting hole 3b, and this notch 25a is connected to the back wall of the mounting hole 3b. In a state where a gap is formed between the two, the fitting hole 3b is press-fitted.

In this case, the notch 25a of the reinforcing pipe 25 is arranged so that the key tool 21 is caught as shown in FIG. 25 in a state where the reinforcing pipe 25 is attached in the attachment hole 3b as shown in FIG. It is configured. As in the sixth embodiment, the key-shaped tool 21 is for pulling out the reinforcing pipe 25 from the mounting hole 3b. The key-shaped tool 21 includes a rod-shaped main body portion 22 and a hook portion 23 provided at the tip of the main body portion 22. And a grip portion 24 provided at the other end of the main body portion 22.

As a result, as shown in FIG. 25, the key-shaped tool 21 inserts the rod-shaped main body portion 22 into the reinforcement pipe 25 press-fitted into the mounting hole 3 b, and the hook portion 23 at the tip of the rod-like main body portion 22 is cut into the reinforcement pipe 25. The reinforcing pipe 25 can be taken out from the mounting hole 3b when inserted into the notch 25a, hooked on the inner edge of the notch 25a, and pulled in the arrow direction with the grip 24 in this state.

Such a wristband mounting structure of the watch case 1 has the same effect as that of the first embodiment, and also has a notch 25a at the end of the reinforcing pipe 25 located on the back side of the mounting hole 3b. Similarly to the sixth embodiment, the reinforcing pipe 25 press-fitted into the mounting hole 3 b of the band mounting portion 3 can be easily taken out from the mounting hole 3 b by the key tool 21. For this reason, when exchanging the watch band 2, even if the spring bar 4 is changed, it can be replaced with a reinforcing pipe 25 having a size corresponding to the spring bar 4.

In addition, in the said Embodiment 7, although it described about the case where the notch part 25a was provided in the edge part side of the reinforcement pipe 25 located in the back | inner side of the attachment hole 3b, it was necessarily located in the back | inner side of the attachment hole 3b. It is not necessary to provide the notch 25a on the end side of the reinforcing pipe 25, and a configuration in which a hole as a notch is provided at any position of the reinforcing pipe except for the end of the reinforcing pipe located in the outer direction. good.

In the sixth embodiment, the key hole 20b is provided in the bottom plate portion 20a of the reinforcing pipe 20, and the cutout portion 25a is provided in the end of the reinforcing pipe 25 in the seventh embodiment. Instead, the reinforcing pipes 5, 7, 10, 12, 15 of the first to fifth embodiments may be provided with key holes or notches. If comprised in this way, similarly to Embodiment 6, 7, each reinforcement pipe 5, 7, 10, 12, 15 fixed in the attachment hole 3b can be removed easily.

Furthermore, in Embodiments 1 to 7 and the modifications thereof, the case where the watch band 2 is formed of a synthetic resin such as a urethane resin has been described. However, the watch band is not limited to this and is made of cloth, metal, or the like. It may be.

It is the perspective view which showed the wristwatch case in Embodiment 1 of the band attachment structure of the wristwatch case to which this invention is applied. It is a disassembled perspective view of the principal part which showed the state which attaches a watch band to the wristwatch case of FIG. FIG. 3 is an enlarged perspective view showing the spring bar of FIG. 2. It is an expanded sectional view of the principal part in the AA arrow of FIG. It is an expanded sectional view of the principal part which showed the state which press-fits a reinforcement pipe in the attachment hole provided in the band attachment part of the watch case in Embodiment 2 of the band attachment structure of the watch case to which this invention is applied. FIG. 6 is an enlarged cross-sectional view of a main part showing a state where the reinforcing pipe of FIG. 5 is press-fitted into the mounting hole. It is an expanded sectional view of the principal part which showed the state which forms a projection part in the reinforcement pipe of FIG. 6 with a spreading tool. FIG. 8 is an enlarged cross-sectional view of a main part illustrating a state in which a protrusion is formed on the reinforcing pipe and bites into an inner surface of the mounting hole in FIG. It is an expansion perspective view of the principal part which showed the band attachment part of the watch case in Embodiment 3 of the band attachment structure of the watch case to which this invention is applied. It is an expanded sectional view of the principal part in the BB arrow view of FIG. It is an expansion perspective view of the principal part which showed the band attachment part of the watch case in Embodiment 4 of the band attachment structure of the watch case to which this invention is applied. It is the expanded sectional view of the principal part which showed the state which inserts a reinforcement pipe in a mounting hole with a pipe insertion jig in CC arrow of FIG. It is an expanded sectional view of the principal part which showed the state by which the reinforcement pipe was attached to the attachment hole with the pipe insertion jig of FIG. It is an expanded sectional view of the principal part which showed the state which press-fits a reinforcement pipe in the attachment hole of a band attachment part in Embodiment 5 of the band attachment structure of the wristwatch case to which this invention is applied. It is the expanded sectional view of the principal part which showed the state which press-fit the reinforcement pipe in the attachment hole in the state of FIG. It is an expanded sectional view of the principal part which showed the state which crushes the edge of an attachment hole with a crushing jig in the state of FIG. 15, and forms a retaining part. It is an expanded sectional view of the principal part which showed the state in which the retaining part was formed in the edge part of the attachment hole in FIG. It is an expanded sectional view of the principal part which showed the state which press-fits a reinforcement pipe in the attachment hole of a band attachment part in Embodiment 6 of the band attachment structure of the wristwatch case to which this invention is applied. It is the expanded sectional view of the principal part which showed the state which press-fitted the reinforcement pipe in the attachment hole in the state of FIG. It is the expanded sectional view of the principal part which showed the state which takes out a reinforcement pipe with the key tool in the attachment hole in the state of FIG. It is an expanded sectional view of the principal part which showed the state which took out the reinforcement pipe with the key tool in the attachment hole in the state of FIG. It is the perspective view of the principal part which showed the state which press-fits a reinforcement pipe in the attachment hole of a band attachment part in Embodiment 7 of the band attachment structure of the wristwatch case to which this invention is applied. It is the expanded sectional view of the principal part which showed the state which press-fits a reinforcement pipe in a mounting hole in the DD arrow of FIG. It is an expanded sectional view of the principal part which showed the state which press-fit the reinforcement pipe in the attachment hole in the state of FIG. It is an expanded sectional view of the principal part which showed the state which takes out a reinforcement pipe with the key tool in the attachment hole in the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Watch case 2 Watch band 3 Band attaching part 3a Mounting recessed part 3b Mounting hole 4 Spring bar 4a Spring bar main body 4b Locking protrusion 5, 7, 10, 12, 15, 20, 25 Reinforcing pipe 5a, 7a, 10a Protruding part 8 Spreading tool 12a Slit groove 13 Pipe insertion jig 16 Crushing tool 17 Detachment part 20a Bottom plate part 20b Key hole 21 Key tool 25a Notch

Claims (7)

In the watch case band mounting structure in which the watch band is attached to the band mounting portion of the watch case made of a soft material by a spring bar,
A metal tubular member into which an end of the spring bar is inserted is attached by press-fitting into an attachment hole formed in the band attaching portion, and a retaining portion is provided on the tubular member. Watch case band mounting structure.   2. The protrusion according to claim 1, wherein the retaining portion is a protrusion provided to protrude toward an outer peripheral side of an end portion of the cylindrical member located in the outer direction of the attachment hole. Watch case band mounting structure.   The projecting portion is formed by the end portion of the cylindrical member positioned in the outer direction of the attachment hole being spread by a spreading tool in a state where the tubular member is inserted into the attachment hole of the band attachment portion. The wristwatch case band mounting structure according to claim 2, wherein the wristwatch case band mounting structure is formed.   2. The wristwatch case band mounting structure according to claim 1, wherein the retaining portion is a protrusion provided on the outer peripheral surface of the cylindrical member so as to protrude toward the outer peripheral side. In the watch case band mounting structure in which the watch band is attached to the band mounting portion of the watch case made of a soft material by a spring bar,
A slit groove is formed along the axial direction of a metal cylindrical member that is attached in an attachment hole formed in the band attachment portion and into which an end of the spring bar is inserted, and the cylinder is formed by the slit groove. A wristwatch case band mounting structure characterized in that an elastic force is applied to a cylindrical member, and the cylindrical member is elastically contacted to the inner surface of the mounting hole by the elastic force. In the watch case band mounting structure in which the watch band is attached to the band mounting portion of the watch case made of a soft material by a spring bar,
A metal cylindrical member into which the end of the spring bar is inserted is attached by press-fitting into an attachment hole formed in the band attachment portion, and the tubular member is prevented from coming off at the edge of the attachment hole. A band mounting structure for a watch case, characterized in that a retaining portion is provided. 7. The hook portion on which the key tool is hooked in a state in which the tubular member is mounted in the mounting hole. The wristwatch case band mounting structure described in 1.

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