JP2005329175A - Connecting shaft and wristwatch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting shaft capable of easily connecting and disconnecting between a first portion and a second portion of accessories and to provide a wristwatch having the connecting shaft. <P>SOLUTION: This connecting shaft 32 is provided with a hollow part 332, a body 33 having a stopper 38 projecting from the internal circumferential face 37 of the hollow part 332, a pin 34 having a first groove 40 inserted in the hollow part 332 and provided in the outer circumferential face 342 along its circumferential direction, and a second groove 49 provided in the outer circumferential face 342 and communicating with the first groove 40, and a compression spring 35 energizing the body 33 and the pin 34 in a direction where the whole length of the connecting shaft 32 extends. The stopper 38 is engaged with the first groove 40 to retain a contracted state where the whole length is contracted, and when the body 33 and the pin 34 are relatively rotated from the contracted state, the stopper 38 is inserted into the second groove 49 to be changed into an extended state where the whole length extends longer than the contracted state by the energizing force of the compression spring 35. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a connecting shaft and a wristwatch.

  Conventionally, in a wristwatch, a connecting tool (connecting tool) shown in FIG. 9 is known as a connecting tool for connecting a watch case and a band. The connector 54 is provided in a pipe 51 having an inner diameter reduced at both ends, a pair of pins 52 inserted into both ends of the pipe 51, and a lumen (hollow part) of the pipe 51. Each of the pins 52 includes a compression coil spring 53 that urges each pin 52 so as to protrude from both ends of the pipe 51.

  When connecting the watch case and the band using the connecting tool 54, first, the connecting tool 54 is inserted into a through hole (insertion hole) provided at an end of the band and through which the connecting tool 54 is inserted. In this state, the connecting tool 54 is compressed in the axial direction, and the connecting tool 54 is inserted between the pair of protrusions 55 in the watch case while each pin 52 of the connecting tool 54 is accommodated in the pipe 51. Then, by releasing the compression with respect to the connector 54, each pin 52 is projected from the pipe 51, and the end of each pin 52 is engaged with a bearing 56 provided on the opposing surface of each projection 55 corresponding thereto. Let

  However, since the connector 54 is composed of fine parts, these constituent parts are easily damaged. Further, in connecting the watch case and the band, handling of the connecting tool 54 is troublesome, for example, a special tool is required or the connecting tool 54 needs to be compressed in the axial direction. For this reason, it is difficult for the user to operate the connecting member 54 and replace the band, and also to make the connection efficiently even in the production factory.

Thus, in recent years, a connector has been disclosed that can easily and freely adjust the total length of the connector when the connector is compressed in the axial direction (see, for example, Patent Document 1). The connector has a telescopic shaft portion that protrudes from one end of the connector main body and is extendable and contractable with respect to the connector main body. The telescopic shaft tool is provided with a protrusion with which a user's finger can be engaged. When contracting the coupling tool, the finger is engaged with the protrusion and the telescopic shaft portion is moved.
However, since this projection is provided with the projection, the projection protrudes from the coupling portion between the watch case and the band. Therefore, there is a problem that the appearance of the wristwatch is impaired and the wearability is impaired.

Japanese Utility Model Publication No. 62-79419

  An object of the present invention is to provide a connecting shaft capable of easily connecting and disconnecting the first part and the second part of a jewelry, and to provide a wristwatch including the connecting shaft. is there.

Such an object is achieved by the present invention described below.
The connecting shaft according to the present invention includes a first portion having two bearings provided to face each other, an insertion portion inserted between the two bearings, and a second hole having a through hole penetrating the insertion portion. A connecting shaft that is inserted through the through-hole of the accessory including the first part and connects the first part and the second part,
A cylindrical body having a hollow portion and a protruding portion protruding from the inner peripheral surface of the hollow portion;
A columnar body having a first groove inserted into the hollow portion and provided on an outer peripheral surface along a circumferential direction thereof, and a second groove provided on the outer peripheral surface and communicating with the first groove; ,
Urging means for urging the cylindrical body and the columnar body in a direction in which the entire length of the connecting shaft extends;
When the projecting portion is engaged with the first groove, the contracted state in which the entire length contracts is maintained, and when the cylindrical body and the columnar body are relatively rotated from the contracted state, the projecting portion Is inserted into the second groove, and the full length is extended as compared with the contracted state by the urging force of the urging means, and the ends of the cylindrical body and the columnar body enter the bearings, respectively. It changes to an extended state.
Accordingly, it is possible to provide a connecting shaft that can easily connect and disconnect the first part and the second part of the accessory.

In the connecting shaft of the present invention, it is preferable that the first groove is formed over the entire circumference of the outer peripheral surface.
Thereby, a columnar body can be rotated relatively with respect to a cylindrical body irrespective of a rotation direction.
In the connecting shaft according to the present invention, it is preferable that the second groove is formed substantially along the longitudinal direction of the columnar body.
Thereby, the protrusion of the columnar body can easily move between the first groove and the second groove.

In the connecting shaft of the present invention, it is preferable that end portions of the cylindrical body and the columnar body are provided with reduced diameter portions that are inserted into the respective bearings and whose outer diameters are reduced.
Thereby, the internal diameter of a bearing can be made small and it can prevent that a bearing stands out with respect to a 1st site | part. Therefore, the aesthetics of the accessory can be improved.
In the connecting shaft of the present invention, it is preferable that the distance between the opening surfaces of the two bearings is substantially equal to the width of the insertion portion.
Thereby, the magnitude | size of the clearance gap between an insertion part and the opening surface of a bearing can be made small, Therefore, the aesthetics of jewelry can be improved.

In the connecting shaft of the present invention, at least one end of the cylindrical body and the columnar body is engaged with a tool for rotating one of the cylindrical body and the columnar body with respect to the other. It is preferable that a portion is provided.
Thereby, a tool can be reliably engaged with a connecting shaft.
In the connecting shaft according to the present invention, it is preferable that the engaging portion is constituted by a groove having a single character shape.
Thereby, a tool can be reliably engaged with a connecting shaft.

In the connecting shaft of the present invention, it is preferable that the urging means is composed of a compression coil spring.
Thereby, it is possible to obtain a biasing force that biases the cylindrical body and the columnar body with a simple structure.
In the connecting shaft of the present invention, it is preferable that the compression coil spring is installed in a hollow portion of the cylindrical body.
Thereby, it is possible to obtain a biasing force that biases the cylindrical body and the columnar body with a simple structure.

The wristwatch of the present invention includes the connecting shaft of the present invention.
Thereby, the 1st site | part and 2nd site | part of jewelry can be connected and disconnected easily.
In the wristwatch of the present invention, it is preferable that the first part is a wristwatch case and the second part is a wristwatch band.
Thereby, the 1st site | part and 2nd site | part of jewelry can be connected and disconnected easily.

  According to the present invention, it is possible to provide a connecting shaft capable of easily connecting and disconnecting the first portion and the second portion, and to provide a wristwatch provided with the connecting shaft.

Hereinafter, a connecting shaft and a wristwatch of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
1 is a perspective view of a wristwatch having a connecting shaft according to the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a side view of the wristwatch shown in FIG. 1, and FIGS. 6 to 9 are a wristwatch case and a wristwatch band, respectively, using the joint shaft of the present invention. It is a figure which shows the method of connecting.

As shown in FIGS. 1 and 2, an analog wristwatch (jewelry) 1 (hereinafter simply referred to as a “watch”) includes an exterior part (a watch case (first part)) 2 and an interior of the exterior part 2. And a movement 3 for driving the watch hand 31 and a wristwatch band (second part) 4 (hereinafter simply referred to as “band”) used when the watch 1 is worn on the wrist. I have.
As shown in FIG. 2, the exterior portion 2 includes a case 23, a glass plate (cover glass) 21, a bezel 22 that holds the glass plate 21, and a watch back cover 5 (hereinafter referred to as a back cover 5) installed on the back side of the case 23. , Simply referred to as “back cover”).

A winding stem pipe 26 is fitted into the barrel 23 shown in FIG. 2, and a crown 24 is rotatably provided on the winding stem pipe 26. By rotating the crown 24, the torque is transmitted to the movement 3 via the shaft 27. Thereby, the clock hand 31 can be adjusted, that is, the time to be displayed can be adjusted.
The body 23 and the bezel 22 are fixed to each other by a plastic packing 28, and the bezel 22 and the glass plate 21 are fixed to each other by a plastic packing 29.
Further, the back cover 5 is fitted (or screwed) to the body 23, and a ring-shaped rubber packing (back cover packing) 30 is inserted in a compressed state in these joint portions (seal portions) 50. Has been. With this configuration, the seal portion 50 is sealed in a liquid-tight manner, and a waterproof function is obtained.

As shown in FIG. 3, the connecting shaft 32 includes a bottomed cylindrical main body (cylindrical body) 33 having a hollow portion 332, a pin (columnar body) 34, and a compression coil spring (biasing means) 35. I have. The connecting shaft 32 is used to connect the exterior portion 2 and the band 4.
The main body 33 projects from the bottom (end) 331 in the direction of the central axis of the main body 33 and has a reduced diameter portion 36 whose outer diameter is smaller than the outer diameter of the main body 33, and an inner peripheral surface 37 of the hollow portion 332. It has a protruding stopper (protruding portion) 38.
The stopper 38 has a cylindrical shape and is press-fitted into a hole 335 that penetrates from the outer peripheral surface 334 of the main body 33 to the inner peripheral surface 37. The press-fitted stopper 38 has an outer end surface 381 that does not protrude from the outer peripheral surface 334 of the main body 33. Thereby, the connecting shaft 32 can be smoothly (smoothly) inserted (inserted) into the through hole 48 of the band 4.

  In a state where the exterior portion 2 and the band 4 are connected (hereinafter, this state is referred to as “connected state”), the reduced diameter portion 36 is inserted into a bearing 45a of the exterior portion 2 described later. By forming such a reduced diameter portion 36, the inner diameter of the bearing 45a can be reduced, and therefore, the bearing 45a can be prevented from being conspicuous with respect to the exterior portion 2. Therefore, the aesthetics of the timepiece 1 can be improved.

  As shown in FIG. 4, the outer diameter of the pin 34 is set slightly smaller than the inner diameter of the main body 33 (hollow portion 332) so that the pin 34 is inserted into the hollow portion 332 of the main body 33. The pin 34 protrudes in the direction of the central axis of the pin 34 at the outer end 341, and is formed on a reduced diameter portion 39 having a reduced outer diameter, such as a reduced diameter portion 36 of the main body 33, and an outer peripheral surface (outer periphery) 342. The first groove 40 is provided (provided), and the second groove 49 is formed on the outer peripheral surface (outer periphery) 342 in the same manner as the first groove 40.

The first groove 40 is formed over the entire circumference of the outer circumferential surface 342 along the circumferential direction of the outer circumferential surface 342. Thereby, the pin 34 can be rotated relative to the main body 33 regardless of the rotation direction.
The second groove 49 is formed substantially along the longitudinal direction (center axis direction) of the pin 34 and communicates with the first groove 40. That is, the first groove 40 and the second groove 49 are orthogonal to each other. As a result, the pin 34 can easily move between the first groove 40 and the second groove 49.

  Further, the first groove 40 and the second groove 49 are set such that the width of each groove is slightly larger than the diameter (outer diameter) of the stopper 38. Further, the depth of each groove is set slightly larger than the protruding amount of the stopper 38. With such a setting, each groove can smoothly guide the stopper 38, so that the main body 33 and the pin 34 can rotate and move relatively smoothly. Therefore, the total length of the connecting shaft 32 can be changed more easily.

In the connected state, the reduced diameter portion 39 is inserted into a bearing 45b of the exterior portion 2 described later. By forming such a reduced diameter portion 39, the inner diameter of the bearing 45b can be reduced, and therefore, the bearing 45b can be prevented from being conspicuous with respect to the exterior portion 2. Therefore, the aesthetics of the timepiece 1 can be improved.
Further, an engagement groove (groove (engagement portion)) 46 that engages with a tool such as a minus driver 47 is formed on the end surface (end portion) 391 of the reduced diameter portion 39 (see FIG. 8). ). The pin 34 can be rotated with respect to the main body 33 by engaging the minus driver 47 with the engaging groove 46. Thereby, the full length of the connecting shaft 32 can be changed more easily.

As shown in FIG. 5, the engagement groove 46 has a single letter shape in a side view. Thereby, the minus driver 47 can be reliably engaged by the engagement groove 46.
The outer diameter of the reduced diameter portion 36 of the main body 33 and the outer diameter of the reduced diameter portion 39 of the pin 34 are preferably substantially the same. As a result, the inner diameters of the bearings 45a and 45b can be substantially equal to each other. Therefore, the connecting shaft 32 is attached (used) regardless of the attaching direction of the connecting shaft 32 (the left-right direction in FIG. 3). be able to.
The constituent materials of the main body 33 (including the stopper 38) and the pin 34 are not particularly limited, but various metal materials, various plastics, and the like can be used alone or in combination.

  The compression coil spring 35 is a winding spring formed by winding a wire such as steel around a core rod or the like. The outer diameter of the compression coil spring 35 is set slightly smaller than the inner diameter of the main body 33 so that the compression coil spring 35 is inserted (installed) into the hollow portion 332 of the main body 33. Further, the compression coil spring 35 has a free length of the central axis of the hollow portion 33 so as to urge the main body 33 and the pin 34 in the direction in which the entire length of the connecting shaft 32 extends (left and right direction in FIGS. 3 and 6). It is set longer than the length in the direction (longitudinal direction). That is, both ends of the compression coil spring 35 are always in contact with the main body 33 and the pin 34 so that the compression coil spring 35 biases the main body 33 and the pin 34.

Thus, by using the compression coil spring 35, it is possible to obtain a biasing force that biases the main body 33 and the pin 34 with a simple structure.
When the pin 34 is displaced relative to the main body 33, the connecting shaft 32 having such a configuration is changed into a contracted state in which the entire length is contracted and an expanded state in which the entire length is extended as compared with the contracted state. Is possible.

As shown in FIG. 6 (FIG. 4), the stopper 38 engages with the first groove 40, that is, the outer peripheral surface 382 of the stopper 38 and the wall surface 401 of the first groove 40 are urged by the urging force of the compression coil spring 35. The contracted state is maintained by the contact.
Further, when the main body 33 and the pin 34 are relatively rotated from the contracted state, the outer peripheral surface 382 of the stopper 38 and the wall surface 401 of the first groove 40 are in contact (sliding), and the second groove 49 approaches the stopper 38, and finally the stopper 38 is inserted (entered) into the second groove 49 that is moved by the biasing force of the coil spring 35. Thereafter, the outer peripheral surface 382 of the stopper 38 and the wall surface 491 of the second groove 49 are brought into contact with each other by the biasing force of the compression coil spring 35. Thereby, the expansion | extension state of the connection shaft 32 is maintained (refer FIG. 3).
As described above, the stopper 38 enters each groove, and the outer peripheral surface 382 of the stopper 38 and the wall surfaces 401 and 491 of each groove come into contact with each other by the urging force of the compression coil spring 35, so that the connecting shaft 32 is in a contracted state and an extended state. Can be maintained.

  As shown in FIG. 3, in the extended state (connected state), the reduced diameter portion 36 of the main body 33 and the reduced diameter portion 39 of the pin 34 enter the bearings 45a and 45b, respectively. Thereby, the exterior part 2 and the band 4 can be connected easily and reliably. Further, even if an external force that pulls the band 4 with respect to the exterior portion 2, that is, an external force that releases the connection between the exterior portion 2 and the band 4 is applied, the extended state of the connecting shaft 32 is maintained. Therefore, the reduced diameter portion 36 of the main body 33 and the reduced diameter portion 39 of the pin 34 are prevented from being easily detached from the bearings 45a and 45b, respectively.

Here, each connection location where the exterior part 2 and the band 4 are connected by the connection shaft 32 is demonstrated.
As shown in FIG. 1, the exterior portion 2 is provided with two pairs of protrusions 42a and 42b provided at the edge thereof. The pair of protrusions 42a and 42b form (configure) an inserted portion 44 into which an insertion portion 41 of the band 4 described later is inserted (connected).

As shown in FIG. 3, the protrusions 42a and 42b have bearings (shaft holes) 45a and 45b formed (provided) on two surfaces 43a and 43b that face each other. That is, the bearings 45a and 45b are provided on the protrusions 42a and 42b so as to face each other.
Moreover, these bearings 45a and 45b have penetrated the protrusion parts 42a and 42b, respectively. Thereby, the minus driver 47 can be inserted from any of the bearings 45a and 45b.

As shown in FIG. 1, the band 4 is provided with insertion portions 41 to be inserted into the inserted portions 44 (between the two bearings 45 a and 45 b) at both ends of the band 4.
As shown in FIG. 3, the insertion portion 41 (band 4) has a through-hole 48 that penetrates in the width direction (left-right direction in FIG. 3). In the connected state, the connecting shaft 32 is inserted (installed) into the through hole 48, and the exterior portion 2 and the band 4 can rotate about the connecting shaft 32.

The width of the insertion portion 41 (the length indicated by _{w 2} in FIG. 3), two bearing 45a, 45b opening face of the (surface 43a, 43 b) the distance (length indicated by _{w 1} in FIG. 3) Is almost equivalent. Thereby, the magnitude | size of the clearance gap (clearance) between the insertion part 41 and the to-be-inserted part 44 can be made small, Therefore, the aesthetics of the timepiece 1 can be improved.
Further, the inner diameter of the through hole 48 is preferably slightly larger than the outer diameter of the main body 33 (connection shaft 32). Thereby, the exterior part 2 and the band 4 can rotate reliably. Further, the connecting shaft 32 can be easily inserted into the through hole 48, so that the exterior portion 2 and the band 4 can be easily assembled (connected).

Next, a method (connecting method) for connecting the exterior portion 2 and the band 4 using the connecting shaft 32 will be described.
First, the stopper 38 of the pin 34 is engaged with (inserted into) the first groove 40 of the main body 33, that is, the connecting shaft 32 is brought into a contracted state.
Next, as shown in FIG. 6, the contracted connecting shaft 32 is inserted (inserted) into the through hole 48 of the band 4. Note that the length of the connecting shaft 32 in the contracted state is set to be approximately equal to or shorter than the length of the through hole 48. As a result, both end portions (the reduced diameter portions 36 and 39) of the connecting shaft 32 are prevented from projecting from both openings of the through hole 48, so that the insertion portion 41 of the band 4 is inserted into the insertion portion 44 of the exterior portion 2. This insertion can be performed easily when inserted into the case.

Next, in the state described above, the insertion portion 41 of the band 4 is inserted into the insertion portion 44 of the exterior portion 2 in the direction of the arrow in FIG. At this time, the contracted state of the connecting shaft 32 is maintained by the engagement (contact) between the first groove 40 of the main body 33 and the stopper 38 of the pin 34, so that the connecting shaft 32 (connecting tool) is conventional. It is not necessary to keep the contracted state by sandwiching both ends of the connecting shaft. Therefore, the insertion portion 41 can be easily inserted into the inserted portion 44. That is, the exterior part 2 and the band 4 can be easily assembled.
Further, as shown in FIG. 7, when the insertion portion 41 of the band 4 is inserted into the insertion portion 44 of the exterior portion 2, the reduced diameter portion 36 and the reduced diameter portion 39 of the connecting shaft 32 are respectively provided with bearings 45a and 45b. It is arranged (installed) at a position facing the.

Next, as shown in FIG. 8, the tip of the minus driver 47 is inserted into the bearing 45b, the tip is engaged with the engaging groove 46, and the minus driver 47 pushes the connecting shaft 32 toward the center axis ( Moving. Then, the bottom portion 331 of the main body 33 is brought into contact with (pressed on) the surface 43a, and the reduced diameter portion 36 is engaged with (inserted into) the bearing 45a.
Next, the pin 34 is rotated, for example, counterclockwise using the minus driver 47 so that the pin 34 enters the second groove 49. As a result, the connecting shaft 32 extends.
Thereafter, as shown in FIG. 9 (FIG. 3), in the connecting shaft 32, the stepped portion 345 of the pin 34 abuts on the surface 43b, and the reduced diameter portion 39 engages (inserts) into the bearing 45b.
The exterior part 2 and the band 4 can be easily connected by the connection method shown above. Moreover, in order to cancel | release connection with the exterior part 2 and the band 4, a connection cancellation | release can be easily carried out by performing operation (process) reverse to the above. Further, the timepiece 1 including the connecting shaft 32 can be obtained.

According to the connecting shaft of the present invention, it is possible to easily and freely adjust the length of the connecting shaft 32 by displacing (rotating) the pin 34 in a state where the connecting shaft 32 is housed in the through hole 48 of the insertion portion 41. it can. As a result, it is possible to eliminate the need to provide the connecting shaft 32 with a protrusion that can be extended and contracted with bare hands. Therefore, it is possible to ensure the wearability without impairing the appearance of the timepiece 1.
Further, since the length of the connecting shaft 32 can be adjusted by the minus driver 47, it is not necessary to use a special tool (for example, a wristband attaching / detaching tool) for connecting the exterior portion 2 and the band 4. However, the band 4 can be easily exchanged, and the exterior portion 2 and the band 4 can be easily and easily connected in the production factory.

In addition, the length of the connecting shaft 32 is steplessly changed by allowing the pin 34 to move freely with respect to the main body 33 until the stopper 38 abuts against the end (wall surface) of the second groove 49. Therefore, it is possible to deal with several types of bands 4 (inserted portions 44) having different widths by using one type of connecting shaft 32, which contributes to reducing the types of connecting shafts 32 and reducing inventory.
In the contracted state, the length of the connecting shaft 32 is set to be equal to or less than the width of the band 4. This eliminates the need to insert the connecting shaft 32 together with the insertion portion 41 of the band 4 from the oblique direction with respect to the insertion portion 44. As a result, the clearance can be reduced. Thereby, the aesthetics of the timepiece 1 can be improved.

Further, when the connecting shaft 32 is further extended, both ends of the connecting shaft 32, that is, the bottom portion 331 of the main body 33 and the stepped portion 345 of the pin 34 are firmly in contact (crimped) with the surfaces 43a and 43b, respectively. Can be set to give resistance to the rotation of the exterior portion 2 and the band 4. Furthermore, it is possible to make a setting for stopping the rotation.
Moreover, it is preferable that the both end surfaces of the connecting shaft 32 are respectively located substantially equal to or inside the positions of the outer openings in the bearings 45a and 45b. Thereby, it is possible to prevent the reduced diameter portions 36 and 39 from projecting outward from the bearings 45a and 45b, and for example, the reduced diameter portions 36 and 39 are locked (hooked) on the clothes of the user. Can be prevented.

The connecting shaft and the wristwatch of the present invention have been described based on the illustrated embodiments, but the present invention is not limited to these.
For example, in the above description, the case where the connecting shaft of the present invention is applied to a wristwatch as an accessory has been described. However, the accessory to which the connecting shaft of the present invention is applied is not limited to this, and a pendant, a bracelet, or the like is rotated. The accessory comprised from two or more members (parts) connected so that it corresponds is applicable.

The wristwatch is not limited to an analog type, and may be a digital type.
Further, the first groove is not limited to being formed over the entire circumference of the outer peripheral surface, and may be formed in a part along the circumferential direction of the outer peripheral surface.
Further, the second groove is not limited to being formed along the longitudinal direction of the pin, and may be formed, for example, so as to form a predetermined angle with respect to the longitudinal direction of the pin. Thereby, since the pin moves in the second groove while the outer peripheral surface of the pin slides on the wall surface (side surface) of the second groove, the urging force of the compression coil spring can be suppressed. Protruding from the main body is prevented.

Further, the engaging portion is not limited to being provided at the reduced diameter portion (end portion) of the pin. For example, the engaging portion may be provided at the reduced diameter portion (end portion) of the main body. It may be provided in both the diameter part (end part) and the reduced diameter part (end part) of the main body.
Further, the engaging portion is not limited to be formed so as to correspond to a minus driver, and may be formed to correspond to, for example, a hexagon wrench (wrench) or a plus driver.

Further, the bearing into which the reduced diameter portion of the main body is inserted is not limited to being formed so as to penetrate, and for example, the bearing may be formed to have a concave shape as long as the reduced diameter portion of the main body is inserted. Good.
The bearing and the reduced diameter portion of the main body are preferably configured to fit (fix) each other. Thereby, when rotating a pin, it is prevented that a main body rotates with this rotation.

It is a perspective view of a wristwatch provided with the connecting shaft of the present invention. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a perspective view of the pin with which the connecting shaft of the present invention is provided. It is a side view of the wristwatch shown in FIG. It is a figure which shows the method of connecting a wristwatch case and a wristwatch band using the connecting shaft of this invention. It is a figure which shows the method of connecting a wristwatch case and a wristwatch band using the connecting shaft of this invention. It is a figure which shows the method of connecting a wristwatch case and a wristwatch band using the connecting shaft of this invention. It is a figure which shows the method of connecting a wristwatch case and a wristwatch band using the connecting shaft of this invention. It is sectional drawing of the coupling tool which connects the timepiece case and the wristwatch band in the conventional wristwatch.

Explanation of symbols

  1 …… Analog wrist watch 2 …… Exterior (watch case) 3 …… Movement 4 …… Band 5 …… Back cover 21 …… Glass plate 22 …… Bezel 23 …… Body 24 …… Crown 26 …… Winding pipe 27 …… Shaft 28, 29 …… Plastic packing 30 …… Rubber packing 31 …… Clock hand 32 …… Connecting shaft 33 …… Main body 331 …… Bottom 332 …… Hollow 334 …… Outer peripheral surface 335… ... Hole 34 ... Pin 341 ... End 342 ... Outer peripheral surface 345 ... Stepped portion 35 ... Compression coil spring 36 ... Reduced diameter portion 37 ... Inner peripheral surface 38 ... Stopper 381 ... End surface 382 ... Outer periphery Surface 39 …… Reduced diameter portion 391 …… End surface 40 …… First groove 401 …… Wall surface 41 …… Insertion portion 42a, 42b …… Protrusion portion 43a, 43b …… Surface 44 …… Covered Entry portion 45a, 45b …… Bearing 46 …… engagement groove 47 …… Fine screwdriver 48 …… through hole 49 …… second groove 491 …… wall surface 50 …… sealing part 51 …… pipe 52 …… pin 53 …… Compression coil spring 54 …… Connector 55 …… Protrusion 56 …… Bearing

Claims (11)

An accessory comprising: a first portion having two bearings provided to face each other; a second portion having an insertion portion inserted between the two bearings; and a through-hole penetrating the insertion portion. A connecting shaft that is inserted through the through hole and connects the first part and the second part;
A cylindrical body having a hollow portion and a protruding portion protruding from the inner peripheral surface of the hollow portion;
A columnar body having a first groove inserted into the hollow portion and provided on an outer peripheral surface along a circumferential direction thereof, and a second groove provided on the outer peripheral surface and communicating with the first groove; ,
Urging means for urging the cylindrical body and the columnar body in a direction in which the entire length of the connecting shaft extends;
When the projecting portion is engaged with the first groove, the contracted state in which the entire length contracts is maintained, and when the cylindrical body and the columnar body are relatively rotated from the contracted state, the projecting portion Is inserted into the second groove, and the full length is extended as compared with the contracted state by the urging force of the urging means, and the ends of the cylindrical body and the columnar body enter the bearings, respectively. A connecting shaft characterized by changing to an extended state.   The connecting shaft according to claim 1, wherein the first groove is formed over the entire circumference of the outer peripheral surface.   The connecting shaft according to claim 1, wherein the second groove is formed substantially along a longitudinal direction of the columnar body.   The connecting shaft according to any one of claims 1 to 3, wherein the cylindrical body and the columnar body are respectively provided with a reduced-diameter portion that is inserted into the bearings and has a reduced outer diameter. .   The connecting shaft according to any one of claims 1 to 4, wherein a distance between opening surfaces of the two bearings is substantially equal to a width of the insertion portion.   At least one end of the cylindrical body and the columnar body is provided with an engaging portion that engages with a tool for rotating one of the cylindrical body and the columnar body with respect to the other. Item 6. The connecting shaft according to any one of Items 1 to 5.   The connecting shaft according to claim 6, wherein the engagement portion is configured by a groove having a single character shape.   The connecting shaft according to any one of claims 1 to 7, wherein the biasing means is configured by a compression coil spring.   The connecting shaft according to claim 8, wherein the compression coil spring is installed in a hollow portion of the cylindrical body.   A wristwatch comprising the connecting shaft according to claim 1.   The wristwatch according to claim 10, wherein the first part is a wristwatch case, and the second part is a wristwatch band.

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