Abstract:
A portable timepiece has a timepiece movement and a movement interlock axle that undergoes linear movement and undergoes rotational movement to transmit a rotational force to the timepiece movement. An external operation body is operable to linearly move and rotate the movement interlock axle. A stopper member undergoes movement between a first position in which the stopper member is engaged with an engagement part of the movement interlock axle to prevent linear movement thereof and a second position in which the stopper member is not engaged with the engagement part to permit linear movement. An operation body undergoes movement in a first direction to engage the stopper member and cause the stopper member to move to the first position to engage the engagement part of the movement interlock axle, and undergoes movement in a second direction in which the operation body is disengaged from the stopper member to cause the stopper member to move to the second position to disengage from the engagement part of the movement interlock axle.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a portable timepiece, such as a wristwatch or a pocket watch, in which an armor case of a timepiece armor assembly forms a one-piece structure. 
   2. Description of the Prior Art 
   In a wristwatch in which an armor case is a one-piece structure, since the timepiece armor assembly does not have a case back, it is advantageous to provide a design in which a peripheral part back face side of the timepiece armor assembly is tapered, thereby visually showing a periphery part of the timepiece armor assembly thinly. 
   In the wristwatch of this kind, similarly to the wristwatch having the case back, for a repair and the like there is provided a contrivance for removing a movement interlock axle such as winding stem from a timepiece movement in the armor case. 
   As the contrivance of this kind, hitherto, a setting lever is rotatably supported to a setting lever axle having been attached to a main plate of the timepiece movement, and one end part of a lever for setting lever is provided while being overlapped to this setting lever. The other end part of the lever for setting lever protrudes in a planar form from an external shape of a dial of the timepiece movement, and is disposed in an annular interstice having been formed between a peripheral edge of the dial and an annular face opposed to a dial peripheral face of an edge member that an armor cover has. The other end part of this lever for setting lever is covered by an edge member having supported a glass of the timepiece armor assembly, and exposed so as to be operable by removing the edge member. And, by pressing down the other end part of the exposed lever for setting lever from a front face side of the timepiece armor assembly toward a back face side by a tweezers or the like, it is possible to move the setting lever following upon the lever for setting lever is slanted. By a movement of the setting lever at this time, its stopper part is disengaged from an engagement part of the winding stem, and retention of the winding stem is released. Accordingly, under this state, it is possible to pull out the winding stem through a crown (e.g., refer to Japanese Patent No. 3213892 Gazette (paragraphs 0002-0005, FIG. 1-FIG. 6)). 
   Hitherto, besides this, there is known a contrivance in which an engagement/disengagement operation body having an advance/retreat member moved in a thickness direction of the timepiece armor assembly by a rotation operation is provided in a case bottom wall of the armor case of one-piece structure, a movable axle generally referred to as a setting lever pin is interlocked with the advance/retreat member, and an engagement member having been generally referred to as the lever for setting lever and supported to the movable axle is moved. In this contrivance, by moving the advance/retreat member from the back face side of the timepiece armor assembly toward the front face side, since a stopper part of the engagement member can be removed from a groove of the winding stem, under this state it is possible to pull out the winding stem through the crown (e.g., refer to JP-A-2005-265755 Gazette (paragraphs 0018-0041, FIG. 1-FIG. 7)). 
   In a technique of the Patent Document 1, in which it is necessary to protrude the other end part, that is an operation part of the lever for setting lever, in the planar form from the external shape of the dial, there is such a problem that, unless an external shape of the timepiece armor assembly is made large, a size (parting diameter) of the dial undergoes a restriction by the lever for setting lever. 
   In a technique of the Patent Document 2, which can improve such a problem, there is the following problem. That is, the engagement/disengagement operation body attached to the case bottom wall of the armor case of one-piece structure possesses an operation member accommodated in an accommodation hole penetrated through the case bottom wall in a thickness direction and rotation-operated from an outside, and the advance/retreat member rotation-stopped in the accommodation hole by being screwed to an upper part of the operation member and protruded upward in the armor case, and a waterproof gasket ensuring a waterproofness in the accommodation hole is attached to the operation member. 
   Therefore, to a length of the operation member, there is added by a dimension for ensuring the waterproofness, in other words, a thickness dimension of the waterproof gasket. And, a height dimension of the accommodation hole of the case bottom wall accommodating this operation member is determined by considering, besides for the length of the operation member, a stroke dimension of the advance/retreat member, and the accommodation hole is formed by a height having complied with an accumulation of such dimensions. By this, since a thickness of the case bottom wall becomes comparatively thick, it is disadvantageous in sufficiently bringing about an advantage that the armor case is one-piece structure, in other words, an effect making the design visually showing the periphery part of the timepiece armor assembly thinly. 
   Additionally, in a self-winding wristwatch, an oscillating weight whose planar shape is approximately a ginkgo&#39;s leaf for instance is attached to a bottom face part of the timepiece movement and, by the fact that it is rotated about a vertical axle, there is obtained an energy driving the timepiece movement. In the wristwatch like this, in order to avoid an interference between the advance/retreat member of the engagement/disengagement operation body and the oscillating weight, it is necessary to dispose the engagement/disengagement operation body in a region deviated from a rotation locus of the oscillating weight, in other words, a position nearer to a case barrel part of the armor case. Accordingly, since a site in which a wall thickness of the case bottom wall is thick is approached to the case barrel part, it is disadvantageous in sufficiently bringing about the effect making the design visually showing the periphery part of the timepiece armor assembly thinly. 
   SUMMARY OF THE INVENTION 
   It is an object of the present invention to provide a portable timepiece which is made such that a constitution for removing, together with the movement interlock axle such as winding stem, an outside operation body such as crown from the timepiece movement does not become a restriction factor in regard to the size of the dial, and a factor impairing the design visually showing the periphery part of the timepiece armor assembly thinly. 
   In order to solve the above problems, the present invention possesses a timepiece armor assembly which possesses an armor case of one-piece structure in which a case bottom wall and a case barrel part are monolithically made, and in which a taper face is formed in a peripheral part back face of the armor case, a timepiece movement with a dial, which is built-in in the timepiece armor assembly, a movement interlock axle which is connected to the timepiece movement so as to be insertable/removable from a side, which is built-in in the timepiece armor assembly so as to be movable in a direction intersecting a thickness direction of this armor assembly, and which has a stopper engagement part, an outside operation body which is attached to the case barrel part so as to be detachable from a side while being connected to the movement interlock axle, a stopper member built-in in the timepiece armor assembly, and an engagement/disengagement operation body which is provided in the case barrel part so as to be operable from a side of the case barrel part, and which moves in the direction intersecting the thickness direction of the timepiece armor assembly to thereby interlock the stopper member, thereby causing this stopper member to engage with and disengage from the stopper engagement part. 
   In this invention, the outside operation body is one represented by the crown for instance, and indicates a member which operates the timepiece movement in an outside of the timepiece armor assembly and from a side, for a time instant setting, a date setting and the like for instance. In this invention, the movement interlock axle is one represented by the winding stem for instance, and indicates a member which transmits an operation of the outside operation body to the timepiece movement, for the time instant setting and the like for instance. Further, in this invention and the following invention, the direction intersecting the thickness direction of the timepiece armor assembly can preferably be set to a radial direction of the timepiece armor assembly, but the invention is not restricted to this. 
   Further, in order to solve the above problems, the present invention possesses a timepiece armor assembly which possesses an armor case of one-piece structure in which a case bottom wall and a case barrel part are monolithically made, and in which a taper face is formed in a peripheral part back face of the armor case, a timepiece movement with a dial, which is built-in in the timepiece armor assembly, a winding stem which is connected to the timepiece movement so as to be insertable/removable from a side, which is built-in in the timepiece armor assembly so as to be movable in a direction intersecting a thickness direction of this armor assembly, and which has a stopper engagement part, a crown which is attached to the case barrel part so as to be detachable from a side while being connected to the winding stem, a stopper member which is built-in in the timepiece armor assembly, and an engagement/disengagement operation body which is provided in the case barrel part so as to be operable from a side of the case barrel part, and which moves in the direction intersecting the thickness direction of the timepiece armor assembly to thereby interlock the stopper member, thereby causing this stopper member to engage with and disengage from the stopper engagement part. 
   In these inventions, similarly to the outside operation body represented by the crown for instance, which is connected to the movement interlock axle represented by the winding stem for instance, since the engagement/disengagement operation body is provided in the case barrel part not in a case bottom wall of the armor case of one-piece structure, it is possible to move the stopper member by operating the engagement/disengagement operation body in an outside of the case barrel part and from a side without depending on an operation along the thickness direction of the timepiece armor assembly. 
   In detail, in these inventions, when disassembling the portable timepiece, in order to remove the movement interlock axle represented by the winding stem for instance from the timepiece movement, there suffices if the engagement/disengagement operation body is moved toward the timepiece movement by operating it from an outside of the case barrel part of the armor case of one-piece structure. By interlocking with it, since the engagement/disengagement operation body moves the stopper member, this stopper member is removed from the stopper engagement part of the movement interlock axle represented by the winding stem for instance, so that there is released a state in which the movement interlock axle represented by the winding stem has been retained so as not to move. Accordingly, under this state, by grasping and pulling out the outside operation body represented by the crown for instance to the outside of the armor case, the movement interlock axle represented by the winding stem can be pulled out from the timepiece movement and pulled out to the outside while being passed through the case barrel part. 
   And, like the above, since it is possible to operate the engagement/disengagement operation body in the outside of the case barrel part, that the armor case has, and form the side, there is no restriction in dispositions of the engagement/disengagement operation body and the stopper member in regard to the dial. Therefore, there is no fact that the constitution for removing, together with the movement interlock axle such as winding stem, the outside operation body such as crown from the timepiece movement becomes the restriction factor in regard to the size of the dial. 
   Additionally, from a necessity for disposing the movement interlock axle represented by the winding stem and the outside operation body represented by the crown, a wall thickness of the case barrel part along a radial direction of the timepiece armor assembly is formed sufficiently thick in comparison with a thickness of the case bottom wall. Therefore, it is unnecessary to particularly ensure, in the case barrel part, a wall thickness for attaching the engagement/disengagement operation body to the case barrel part, so that a diameter of the timepiece armor assembly does not become large. And, by the above disposition of the outside operation body, the wall thickness of the case bottom wall can be made thin in comparison with a case where the outside operation body is provided in the case bottom wall and, in a case where the invention is applied to the self-winding portable timepiece, there is also no fear that its oscillating weight interferes with the engagement/disengagement operation body. Therefore, there can be made such that the constitution for removing, together with the movement interlock axle such as winding stem, the outside operation body such as crown from the timepiece movement does not become the factor impairing the design visually showing the peripheral part of the timepiece armor assembly thinly. 
   In a desirable mode of the present invention, the case barrel part has an operation body attachment hole which comprises a small diameter hole part provided while being brought closer to an inside of the armor case and a large diameter hole part communicating with the small diameter hole part and provided while being brought closer to an outside of the armor case, and in which a female thread part is formed in an inner face of the small diameter hole part, the engagement/disengagement operation body is formed from an axle part, a male thread part provided in an intermediate part outer periphery of the axle part, a taper-like tip part made by one end part of the axle part and capable of pushing the stopper member, and a flange part provided in the other end part of axle part, and has, in the other end part of the axle part, an operation part rotating this axle part, and the engagement/disengagement operation body is attached to the case barrel part by causing the male thread part to mesh with the female thread part to thereby cause the axle part to penetrate through the small diameter hole part and providing the flange part in the large diameter hole part, so that the engagement/disengagement operation body is biased toward an outside of the case barrel part by a bias member disposed in the large diameter hole part. 
   In the desirable mode of this invention, by the fact that the engagement/disengagement operation body meshed with the case barrel part is biased by the bias member, since a mesh state of the engagement/disengagement operation body to the case barrel part is retained, even if a vibration or an impact is exerted on the timepiece or the flange part is carelessly pushed to a case band inside, the engagement/disengagement operation body is suppressed from moving toward the timepiece movement. Therefore, other than when contriving a disassembly of the portable timepiece, there is no fact that the stopper member is pushed by the taper-like tip part of the engagement/disengagement operation body and, therefore, there can be made such that the movement interlock axle represented by the winding stem is not removed carelessly. 
   Further, in a desirable mode of the present invention, a waterproof ring pushed by the bias member is disposed in a step part formed in a boundary between the small diameter hole part and the large diameter hole part, and an inner periphery face of this waterproof ring is caused to contact with an axle portion between the male thread part and the flange part. 
   In the desirable mode of this invention, a contact of the waterproof ring in regard to a step and the axle portion of the engagement/disengagement operation body is strengthened by a biasing force of the bias member, so that it is possible to more certainly guarantee the waterproofness about the operation body attachment hole. 
   Further, in a desirable mode of the present invention, the case barrel part has an operation body attachment hole which comprises a small diameter hole part provided while being brought closer to an inside of the armor case and a large diameter hole part communicating with the small diameter hole part and provided while being brought closer to an outside of the armor case, the engagement/disengagement operation body is formed from an axle part, a taper-like tip part made by one end part of the axle part and capable of pushing the stopper member, a flange part provided in the other end part of axle part, and a lock ring attached to a root of the taper-like tip part and capable of engaging with a case band inner face of the case barrel part, and the engagement/disengagement operation body is attached to the case barrel part by causing the axle part to penetrate through the small diameter hole part to thereby cause the taper-like tip part and the lock ring to dispose in an inside of the case barrel part and providing the flange part in the large diameter hole part, so that the engagement/disengagement operation body is biased toward an outside of the case barrel part by a bias member disposed in the large diameter hole part. 
   In the desirable mode of this invention, the engagement/disengagement operation body is biased by the bias member such that the lock ring is caught to the case band inner face of the case barrel part. Therefore, after the engagement/disengagement operation body has been pushing-in-operated to a release position in which the stopped member is removed from the stopper engagement part of the movement interlock axle represented by the winding stem, if its pushing-in force is vanished, it is possible by the biasing force of the bias member to automatically return the engagement/disengagement operation body to a position in which the lock ring is caught to the case band inner face of the case barrel part. 
   Further, in a desirable mode of the present invention, a waterproof ring is attached to an outer periphery of the axle part, and an outer periphery face of this ring is caused to slidably contact with the small diameter hole part. 
   In the desirable mode of this invention, by the waterproof ring, it is possible to guarantee the waterproofness about the operation body attachment hole. 
   Further, in a desirable mode of the present invention, under a state in which the lock ring is being caught to the case band inner face, the flange part is disposed while being brought closer to a direction of a step part formed in a boundary between the small diameter hole part and the large diameter hole part in regard to a case band outer face of the case barrel part. 
   In the desirable mode of this invention, under a state in which the engagement/disengagement operation body is disposed in a position in which the lock ring is caught to the case band inner face of the case barrel part, since the flange part is provided so as to subside in regard to the case band outer face of the case barrel part, the engagement/disengagement operation body is suppressed from moving toward the timepiece movement by the fact that the engagement/disengagement operation body is carelessly pushed to the case band inside and, therefore, there can be made such that the movement interlock axle represented by the winding stem is not removed carelessly. 
   According to the present invention, in order to remove the stopper member from the stopper engagement part of the movement interlock axle such as winding stem, since it is possible to operate the engagement/disengagement operation body moving the stopper member in the outside of the case barrel part that the armor case of one-piece structure has and from the side, it is possible to provide a portable timepiece in which there has been made such that the constitution for removing, together with the movement interlock axle such as winding stem, the outside operation body such as crown from the timepiece movement does not become the restriction factor in regard to the size of the dial, and the factor impairing the design visually showing the periphery part of the timepiece armor assembly thinly. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     A preferred form of the present invention is illustrated in the accompanying drawings in which: 
       FIG. 1  is a plan view showing a wristwatch, with its one part being cut, concerned with a first embodiment of the present invention; 
       FIG. 2  is a sectional view showing a circumference of an engagement/disengagement operation body, that the wristwatch in  FIG. 1  possesses; along an F-F line in  FIG. 1  under a state in which this engagement/disengagement operation body exists in a wait position; 
       FIG. 3  is a sectional view showing the circumference of the engagement/disengagement operation body, that the wristwatch in  FIG. 1  possesses, along the F-F line in  FIG. 1  under a state in which this engagement/disengagement operation body exists in a release position; 
       FIG. 4  is a side view showing the engagement/disengagement operation body, with its one part being sectioned, that the wristwatch in  FIG. 1  possesses; 
       FIG. 5  is a sectional view showing a circumference of an engagement/disengagement operation body, that a wristwatch concerned with a second embodiment of the present invention possesses, under the state in which this engagement/disengagement operation body exists in the wait position; and 
       FIG. 6  is a sectional view showing a circumference of an engagement/disengagement operation body, that a wristwatch concerned with a third embodiment of the present invention possesses, under the state in which this engagement/disengagement operation body exists in the wait position. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   A first embodiment of the present invention is explained by referring to  FIG. 1-FIG .  4 . 
   A reference numeral  11  in  FIG. 1  denotes a wristwatch as the portable timepiece. This wristwatch  11  possesses a timepiece armor assembly  12 , in which a timepiece movement  13  and the like are accommodated. Incidentally, a reference numeral  15  in  FIG. 1  denotes an attachment member such as timepiece band and, by this attachment member  15 , the wristwatch  11  is attached to an arm of a human body. 
   The timepiece movement  13  possesses a movement main body  13   a , and a dial  13   b  covering a surface of this movement main body  13   a . The movement main body  13   a  may be any of one in which a small battery or a mainspring is made a power source, or a self-winding one having the oscillating weight disposed in a side opposite to the dial  13   b  with the movement main body  13   a  being placed between them, or one adapted to a digital timepiece digital-displaying the time instant and the like on the dial  13   b  using a quartz oscillation module, or one in which the one adapted to the digital timepiece and one other than it are used in combination, or the like. The dial  13   b  is larger than the movement main body  13   a  and, as shown in  FIG. 2  and  FIG. 3 , a peripheral part of the dial  13   b  protrudes to a side than an outer periphery of the movement main body  13   a . Incidentally, a reference numeral  14  denotes a hand of the timepiece, which is moved by the movement  13 . 
   As shown in  FIG. 2  and  FIG. 3 , the timepiece armor assembly  12  possesses an armor case  21 , and an armor cover  25  mounted to the timepiece armor assembly. 
   The armor case  21  forms a concave one-piece structure, and is made by a case barrel part  22  of an annular shape, e.g., a circular annulus shape, and a case bottom wall  23  monolithically provided while closing a back side opening of the case barrel part  22 . A wall thickness A of the case barrel part  22  along a radial direction of the timepiece armor assembly  12  is more than several times thicker than a wall thickness B of the case bottom wall  23  along a thickness direction of the timepiece armor assembly  12 . 
   In a peripheral part back face of the armor case  21 , there is formed a taper face  21   a  annularly continuing in a circumferential direction. By this taper face  21   a , since a peripheral part of the timepiece armor assembly  12  becomes thin, it is possible to give an impression in the design, which causes the whole wristwatch  11  to be seen as if it is of a thin type. 
   The armor case  21  may be obtained by monolithically molding a hard synthetic resin, or may be obtained by shaving a metal such as stainless and titanium. The timepiece movement  13  is accommodated in the armor case  21  through its front opening. Incidentally, a reference numeral  16  in  FIG. 2  and  FIG. 3  denotes a casing ring having been fixed to the armor case  21  and, by this casing ring  16 , the timepiece movement  13  is supported at a predetermined position in the armor case  21 . 
   The armor cover  25  has a transparent member  26  comprising a transparent glass and a transparent synthetic resin or the like, and an annular edge member  27  having supported a peripheral edge part of this transparent member  26 . By mounting the edge member  27  to the case barrel part  22 , the timepiece armor assembly  12  is assembled with the transparent member  26  covering the dial  13   b.    
   As shown in  FIG. 1 , a movement interlock axle, e.g., a winding stem  31 , is built-in in the timepiece armor assembly  12  so as to be movable along a direction intersecting perpendicularly to the thickness direction of this timepiece armor assembly  12 , e.g., a radial direction of the timepiece armor assembly  12 . The winding stem  31  is connected to the movement main body  13   a  so as to be insertable/removable from its side. The winding stem  31  has in its axial direction intermediate part a stopper engagement part  32 . The stopper engagement part  32  is formed by an annular groove continuing in a circumferential direction of the winding stem  31 . Under a state in which the winding stem  31  has been connected to the movement main body  13   a  while being inserted, the stopper engagement part  32  is placed in an outside of the movement main body  13   a.    
   A reference numeral  31   a  in  FIG. 1  denotes a truncated-cone-like part provided while adjoining the stopper engagement  32 . This truncated-cone-like part  31   a  is made such that a diameter becomes gradually small as going to one end side of the winding stem  31  disposed in a movement main body  13   a  side. 
   The other end part of the winding stem  31  is inserted into a winding stem passing hole  34  provided in the case barrel part  22 . The winding stem passing hole  34  is formed while penetrating through the case barrel part  22  along the direction intersecting perpendicularly to the thickness direction of the timepiece armor assembly  12 , e.g., the radial direction of the timepiece armor assembly  12 . The winding stem  31  can be pulled out to the outside of the timepiece armor assembly  12  while passing through this winding stem passing hole  34 . 
   As an external operation body, e.g., a crown  35  is connected to the other end part of the winding stem  31 . The greater part of the crown  35  is disposed in an outside of the case barrel part  22 . The crown  35  is provided in the case barrel part  22  in the outside of this case barrel part  22  and so as to be detachable from a side. There is made such that, by rotating this crown  35  under a state having been pulled out by a predetermined distance, this rotation is transmitted to the movement main body  13   a  through the winding stem  31  and thus the time instant setting or the like can be performed. Incidentally, a reference numeral  36  in  FIG. 1  is a ring shape waterproof gasket mounted to the other end part of the winding stem  31  and slid in the winding stem passing hole  34  and, by this waterproof gasket, there are contrived the waterproofness and a dustproofness in regard to the winding stem passing hole  34 . 
   As shown in  FIG. 1 , a stopper member  41  placed in an outside of the movement main body  13   a  is built-in in the timepiece armor assembly  12 . The stopper member  41  is movable in an upward-downward direction along an axle  42  (i.e., is mounted for undergoing pivotal movement about the axle  42 ) having supported an intermediate part of the stopper member, and provided with a rotation angle about this axle  42  being limited to a predetermined angle. The stopper member  41  and the axle  42  are disposed, as a desirable example, near the winding stem  31 . 
   The stopper member  41  is one generally referred to also as the lever for setting-lever. This stopper member  41  has, e.g., a passive part  41   a  consisting of its one end part, and an engagement part  41   b  consisting of the other end part. The engagement part  41   b  is a portion engaged with and disengaged from the stopper engagement part  32 . There is made such that, when these are in an engagement state as shown in  FIG. 1 , the stopper member  41  hinders a pulling-out of the winding stem  31  to an outside of the armor case  21 , and permits the crown  35  to be pull-moved on the occasion of the time instant setting or the like. 
   An engagement/disengagement operation body  45  giving a motion, which releases an engagement (catch) of the engagement part  41   b  in regard to the stopper engagement part  32 , to the stopper member  41  is attached to the case barrel part  22 . 
   That is, e.g., an operation body attachment hole  51  is provided in the case barrel part  22  while being placed near the winding stem passing hole  34 . The operation body attachment hole  51  penetrates through the case barrel part  22  along the direction intersecting perpendicularly to the thickness direction of the timepiece armor assembly  12 , e.g., the radial direction of the timepiece armor assembly  12 . As shown in  FIG. 2  and  FIG. 3 , the operation body attachment hole  51  comprises a stepped hole having a small diameter hole part  51   a  and a large diameter hole part  51   b  communicated with the former and, between the small diameter hole part  51   a  and the large diameter hole part  51   b , there is formed a step part  51   c  forming a boundary of them. 
   The small diameter hole part  51   a  is provide while being brought closer to an inside of the armor case  21 , and opened to this inside. The large diameter hole part  51   b  is provided while being brought closer to an outside of the armor case  21 , and opened to the outside of the armor case  21 . An inner face, of the small diameter hole part  51   a , adjoining the step part  51   c  is protruded into the small diameter hole part  51   a , and a female thread part  51   d  is formed in that portion 
   The engagement/disengagement operation body  45  causing the stopper member  41  to follow forms, together with the stopper member  41 , an interlock axle attachment/detachment mechanism, e.g., a winding stem attachment/detachment mechanism, which makes it possible to insert/remove the winding stem  31  (i.e., the movement interlock axle) from a side in regard to the timepiece movement  13 . This engagement/disengagement operation body  45  is made of a metal or a synthetic resin and, as shown in  FIG. 4  and the like, has an axle part  45   a , a male thread part  45   b , a taper-like tip part  45   c , a flange part  45   d , and an operation part  45   e.    
   The axle part  45   a  comprises a straight axle having a diameter capable of penetrating trough an inside of the female thread part  51   d . The male thread part  45   b  is formed in an intermediate part outer periphery of the axle part  45   a  with a length approximately the same length as a length of the female thread part  51   d , and detachably meshed with the female thread part  51   d . The taper-like tip part  45   c  is made by one end part of the axle part  45   a , and formed like a circular cone for instance. The flange part  45   d  is formed in the other end part of the axle part  45   a  while protruding from its outer periphery. A diameter of the flange part  45   d  is slightly smaller than a diameter of the large diameter hole part  51   b . The operation part  45   e  is provided in the flange part  45   d  and formed, e.g., by a slitting groove traversing the flange part  45   d . There is made such that, by inserting a tip of a tool into this operation part  45   e , the engagement/disengagement operation body  45  is rotation-operated. 
   As shown in  FIG. 2  and  FIG. 3 , the engagement/disengagement operation body  45  is attached to the case barrel part  22  by meshing the male thread part  45   b  with the female thread part  51   d , penetrating the axle part  45   a  through the small diameter hole part  51   a , and disposing the flange part  45   d  in the large diameter hole part  51   b . By rotating this engagement/disengagement operation body  45  to thereby change a mesh with the female thread part  51   d , the engagement/disengagement operation body  45  is reciprocation-moved between a first position (wait position) shown in  FIG. 2  and a second position (release position) shown in  FIG. 3  along the radial direction of the timepiece armor assembly  12 . 
   A state in which the engagement/disengagement operation body  45  disposed in the first position is a normal disposition state. There is made such that, under this state, the taper-like tip part  45   c  of the engagement/disengagement operation body  45  is opposed to the passive part  41   a  of the stopper member  41  while adjoining, and the flange part  45   d  does not protrude to an outside from the large diameter hole part  51   b . A state in which the engagement/disengagement operation body  45  has been disposed in the second position is selected when disassembling the wristwatch  11 . There is made such that, in this case, the taper-like tip part  45   c  of the engagement/disengagement operation body  45  pushes the passive part  41   a  in an upward or downward direction, thereby pushing up the stopper member  41  for instance. 
   In the step part  51   c , there is disposed a waterproof ring  55  capable of elastically deforming, and an inner periphery face of the waterproof ring  55  is contacted with an outer periphery of an axle portion between the male thread part  45   b  and the flange part  45   d . By this waterproof ring  55 , there are contrived the waterproofness and the dustproofness around the operation body attachment hole  51 . A spring reception ring  56  is overlapped to the waterproof ring  55  and, between this spring reception ring  56  and the flange part  45   d , a coil spring  57  for instance is nipped as a bias body while maintaining a state having elastically deformed. Accordingly, by the coil spring  57  disposed in the large diameter part  51   b , the engagement/disengagement operation body  45  is biased toward the outside of the armor case  21  so as to separate from the timepiece movement  13 . By transmitting a force of the coil spring  57  to the waterproof ring  55  through the spring reception ring  56 , contacts of the waterproof ring  55  to the step part  51   c  and the axle part  45   a  can be made more certainly. 
   A correlation between the engagement/disengagement operation body  45  and the stopper member  41  under a normal state in which the wristwatch  11  is carried is shown in  FIG. 2 . Under this state, since the axle part  45   a  of the engagement/disengagement operation body  45  maintains a state in which the axle part  45   a  is separated from the passive part  41   a  of the stopper member  41  and the stopper member  41  exists in a position having descended by its own weight or the like, the engagement part  41   b  of the stopper member  41  fits from above for instance to the stopper engagement part  32  of the winding stem  31  and is caught. Therefore, the winding stem  31  is retained by the stopper member  41 , not so as to move to a pulling out direction. 
   In a case performing a crown operation such as time instant setting, there suffices if, after the winding stem  31  is first pulled out by one stage through the crown  35 , the crown is rotation-operated. By this, it is possible to perform the time instant setting or the like by giving the rotation of the crown  35  to the movement main body  13   a  through the winding stem  31 . Incidentally, at this time, although the stopper member  41  slightly rotates about the axle  42  while following an axial displacement of the winding stem  31 , the engagement part  41   b  is still caught intact while fitting to the stopper engagement part  32  of the winding stem  31 . 
   Further, when disassembling the wristwatch  11 , in a case where the winding stem  31  is pulled out from the timepiece movement  13 , the engagement/disengagement operation body  45  is rotated in a screwing direction by inserting the tool to the operation part  45   e  of the engagement/disengagement operation body  45  from the outside of the armor case  21 . On the basis of a change, in the mesh, due to it between the male thread part  45   b  of the engagement/disengagement operation body  45  and the case barrel part  22 , the engagement/disengagement operation body  45  is moved toward the timepiece movement  13 . As shown in  FIG. 3 , this movement is stopped by the fact that, just after the male thread part  45   b  has been inserted through the female thread part  51   d , the taper-like tip part  45   c  of the axle part  45   a  collides against an outer side face of the movement main body  13   a , and perceived by a worker. Under this state, although a spring force of the coil spring  57  is strengthened, since the male thread part  45   b  is caught to the female thread part  51   d , there is no fact that the engagement/disengagement operation body  45  comes out. 
   And, by the above pushing-in operation of the engagement/disengagement operation body  45 , since the taper-like tip part  45   c  of the axle part  45   a  pushes the passive part  41   a  of the stopper member  41  and the whole stopper member  41  is ascended, the engagement part  41   b  of the stopper member  41  is removed from the stopper engagement part  32  of the winding stem  31 . Accordingly, under a state in which a restraint of the movement in regard to the axial direction of the winding stem  31  has been released in this manner, by pull-moving the winding stem  31  together with the crown  35 , it is possible to cause the winding stem  31  to break away from the movement main body  13   a  and pull out it to the outside of the armor case  21  while passing through the winding stem passing hole  34 . The pulling-out of the winding stem  31  in this manner can be performed also under a complete state before removing the armor cover  25 , or also under a state in which the armor cover  25  has been removed. 
   Incidentally, after this, the engagement/disengagement operation body  45  is rotation-operated in a direction reverse to the above procedures, and returned till the wait position shown in  FIG. 2 . Further, on the occasion of an assembly after the disassembly of the wristwatch  11 , if the winding stem  31  is inserted through the winding stem passing hole  34 , just before the winding stem  31  is inserted into and connected to the movement main body  13   a , the truncated-cone-like part  31   a  of the winding stem  31  pushes up the engagement part  41   b . By this, since the engagement part  41   b  climbs over the truncated-cone-like part  31   a , just after this, the winding stem  31  is connected to the movement main body  13   a , and the engagement part  41   b  falls into the stopper engagement part  32  and is caught. 
   Like the above, since the engagement/disengagement operation body  45  releasing the retention of the winding stem  31  is not moved along the thickness direction of the armor case  21  of one-piece structure, in other words, toward a back side from a front side, or from the back side toward the front side, but moved along the radial direction of the timepiece armor assembly  12  from the outside of the case barrel part  22  of the armor case  21 , it is possible to regardlessly provide this engagement/disengagement operation body  45  without being restricted by the dial  13   b . By this, since there is no fact that the engagement/disengagement operation body  45  gives the restriction to the size of the dial  13   b  and thus a degree of freedom in the size of the dial  13   b  is increased, following upon it, it can be facilitated to provide the wristwatch  11  of various modes in which the size of the dial  13   b  has been caused to differ. 
   Moreover, even in a case where the present invention is applied to the self-winding wristwatch  11  in which the timepiece movement possessing the oscillating weight, there is no fact that a disposition of the engagement/disengagement operation body  45  becomes a problem about the fact that the taper face  21   a  is provided in a peripheral part back side of the armor case  21  that is one-piece structure. By this, it is possible to constitute the self-winding type wristwatch  11  in which there is made the design having thinly formed the peripheral part of the timepiece armor assembly  12 . 
   Accordingly, in the timepiece armor assembly  12  of a certain limited size, it is possible to make the wristwatch  11  in which the dial  13   b  is relatively large, the peripheral part of the timepiece armor assembly  12  is thin and, therefore, it can be seen thinly in the design. Further, from a necessity for disposing the winding stem  31  and the crown  35 , the wall thickness A of the case barrel part  22  along the radial direction of the timepiece armor assembly  12  is sufficiently, thickly formed in comparison with the wall thickness B of the case bottom wall  23 , so that there is no necessity to particularly ensure, in the case barrel part  22 , a wall thickness for attaching the engagement/disengagement operation body  45  to this case barrel part  22 . By this, a diameter of the timepiece armor assembly  12  does not become large. 
   Additionally, in the wristwatch  11 , by biasing the engagement/disengagement operation body  45  meshed with the case barrel part  22  by the coil spring  57 , a mesh state of the engagement/disengagement operation body  45  to the case barrel part  22  is retained. Therefore, even if a vibration or an impact is exerted on the wristwatch  11 , or even if the flange part  45   d  is carelessly pushed to a case band inside, the engagement/disengagement operation body  45  is suppressed from moving toward the timepiece movement  13 . By this, except when contriving the disassembly of the wristwatch  11 , there is no fact that the stopper member  41  is carelessly pushed by the taper-like tip part  45   c  of the engagement/disengagement operation body  45 . Accordingly, there can be made such that the winding stem  31  is not removed carelessly. 
     FIG. 5  shows a second embodiment of the present invention. In this second embodiment, the taper-like tip part  45   c  of the engagement/disengagement operation body  45  is formed like a hemisphere. Since matters other than this point are the same as the first embodiment including portions not shown in  FIG. 5 , the object of the present invention can be achieved also in the second embodiment. In  FIG. 5 , about the same constitution as that of the first embodiment, there is applied the same reference numeral as that the first embodiment. 
     FIG. 6  shows a third embodiment of the present invention. 
   In this third embodiment, the operation body attachment hole  51  provided in the case barrel part  22  is formed from the small diameter hole part  51   a  in which there is no female thread part in the inner face, and the large diameter hole part  51   b  communicated with the former. Further, the engagement/disengagement operation body  45  is formed from the axle part  45   a , the taper-like tip part  45   c , the flange part  45   d , and a lock ring  61 . The lock ring  61  is attached to a root of the taper-like tip part  45   c , and protrudes from the outer periphery. In this engagement/disengagement operation body  45 , the male thread part  45   b  and the operation part  45   e , which have been explained in the first embodiment, are omitted. 
   To an intermediate part outer periphery of the axle part  45   a  of the engagement/disengagement operation body  45 , there is attached a waterproof ring  62  capable of elastically deforming The waterproof ring  62  is slidably contacted with the inner face of the small diameter hole part  51   a , and the waterproof ring  62  and the spring reception ring  56 , which have been explained in the first embodiment, are omitted. By the waterproof ring  62 , there are guaranteed the waterproofness and the dustproofness as to the operation body attachment hole  51 . 
   The engagement/disengagement operation body  45  is attached to the case barrel part  22  by, under a state in which the lock ring  61  is not attached, penetrating the taper-like tip part  45   c  from the large diameter hole part  51   b  toward the small diameter hole part  51   a  while nipping the coil spring  57  between the flange part  45   d  and the step part  51   c , and thereafter mounting the lock ring  61  to the axle part  45   a  in the inside of the armor case  21 . Under this attachment state, by the elastic force of the coil spring  57 , since the engagement/disengagement operation body  45  is biased toward the outside of the case barrel part  22 , the lock ring  61  is caught to a case band inner face  22   a  of the case barrel part  22 . Additionally, under the above attachment state, there is made such that the flange part  45   d  does not protrude from a case band outer face  22   b  of the case barrel part  22  by being brought closer to the case band outer face  22   b  in a step part  51   c  direction. 
   Incidentally, since matters other than those having been explained above are the same as the first embodiment including portions not shown in  FIG. 6 , the object of the present invention can be achieved also in the third embodiment. In  FIG. 6 , about the same constitution as that of the first embodiment, there is applied the same reference numeral as that of the first embodiment. 
   In this third embodiment, when disassembling the wristwatch  11 , in the case where the winding stem  31  is pulled out from the timepiece movement  13 , the engagement/disengagement operation body  45  is moved by being pushed to a timepiece movement  13  direction while resisting against a biasing force of the coil spring  57 . This movement is stopped to a release position by the fact that the taper-like tip part  45   c  of the axle part  45   a  collides against the outer side face of the movement main body  13   a , and perceived by the worker. 
   By such a pushing-in operation, since the taper-like tip part  45   c  of the axle part  45   a  pushes the passive part  41   a  of the stopper member  41  and the whole stopper member  41  is ascended, the engagement part  41   b  of the stopper member  41  is removed from the stopper engagement part  32  of the winding stem  31 . Accordingly, under the state in which the restraint of the movement in regard to the axial direction of the winding stem  31  has been released in this manner, by pull-moving the winding stem  31  together with the crown  35 , it is possible to cause the winding stem  31  to break away from the movement main body  13   a  and pull out it to the outside of the armor case  21  while passing through the winding stem passing hole  34 . The pulling-out of the winding stem  31  in this manner can be performed also under the complete state before removing the armor cover  25 , or also under the state in which the armor cover  25  has been removed. 
   After this, if a pushing-in operation force to the engagement/disengagement operation body  45  is vanished, the engagement/disengagement operation body  45  is automatically returned by the biasing force of the coil spring  57  and, at a time point, in which the engagement/disengagement operation body  45  is returned till a wait position shown in  FIG. 6 , there is no fact that the engagement/disengagement operation body  45  comes out because the lock ring  61  is caught to the case band inner face  22   a  of the case barrel part  22 . 
   And, under a normal state of the wristwatch  11 , although the engagement/disengagement operation body  45  is disposed in the wait position, since its flange part  45   d  is brought closer to a step part  51   c  side direction of the operation body attachment hole  51  so as to subside in regard to the case band outer face  22   b , the engagement/disengagement operation body  45  is suppressed from being carelessly pushed to the case band inside. By this, since the engagement/disengagement operation body  45  is suppressed from moving toward the timepiece movement  13 , there can be made such that the winding stem  31  is not removed carelessly.