JPH11118954A - Member-mounting device and clock and electronic equipment with member-mounting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a member-mounting device where the shape of a back lid being mounted on a case is simple and can be formed freely, the direction of the back lid can be easily determined when mounting the back lid, and a mechanical part or the like can be easily repaired. SOLUTION: In a member-mounting device where a back lid 8 is mounted on a case 12, a mechanical part 5 being inserted into the case 12 is supported, at the same time, a mechanical part support ring 9 being removably mounted on the inner wall of the case is provided, an engagement part 9a being formed at the mechanical part support ring 9 is snap-engaged to an engagement part 8h being formed at an outer-periphery projection part 8b of the back lid 8, and the back lid 8 is mounted on the case 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member attaching device for attaching a back cover to a case, a timepiece having the member attaching device, and an electronic device having the member attaching device.

[0002]

2. Description of the Related Art A general wristwatch will be described below as an example of a timepiece or an electronic device having a member mounting device. In the following description, the time display side of the wristwatch is referred to as the front side, and the back cover side is referred to as the back side. A wristwatch (watch) is required to operate with high accuracy under various environmental conditions in order to always carry and use it. Therefore, in a wristwatch, it is important to securely attach the case and the back cover in order to protect a movement or the like which is a mechanism provided inside the case. Also, when attaching the back lid to the case,
It is also important to make the direction of the mark displayed on the back cover a desired direction and to make the shape of the back cover clear, in terms of the feeling of wearing on the arm and the appearance.

FIG. 5 is a plan view of a wristwatch having a conventional member mounting device when viewed from the back. FIG. 6 is an enlarged sectional view when the wristwatch of FIG. 5 is viewed from the G direction.

As shown in FIG. 6, the wristwatch 101 has a member mounting device 113, a back cover 108, a glass 102, a glass rim 103, a case 112, a movement 105, and a dial 1
06, a needle 107, a middle frame 110, and the like.

[0005] The member mounting device 113 is a device for mounting the back cover 108 and the case 112, and includes a female screw 112a formed on the case 112 and a male screw 108a formed on the back cover 108 as shown in FIG. It is configured. The internal thread 112a is formed on the inner wall of the case 112, and the external thread 108a is formed on the outer peripheral portion of the back cover 108 on the case 112 side. Member mounting device 11
3 is the case 112
The back lid 108 is attached to the case 112 by screwing (screw-fitting) it together with the female screw 112a.

The back lid 108 is used for repairing the built-in movement 105 and the like.
2 can be attached and detached. The back lid 108 has, for example, a substantially circular shape as shown in FIG. The back lid 108 is, for example, a screw-type back lid 108. When attaching to the case 112 as shown in FIG. 6, the back cover 108 is fixed to the case 112 with screws while holding the middle frame 110 that holds the movement 105, which is an internal mechanism of the wristwatch 101.

The case 112 is a side body of the wristwatch 101. The case 112 houses a movement 105 having a needle 107 and a dial 106 therein, and has a glass rim 103 for holding the glass 102 and the like.

In recent years, a power generation mechanism (AGS: Automat)
A wristwatch equipped with an ic Generating System has appeared. Even in such a wristwatch,
By attaching the movement 105 including the power generation mechanism to the case 112 so that the case back 108 supports the movement 105, the movement 105 such as the power generation mechanism is built in the wristwatch 101.

A method for attaching and detaching the back cover 108 to and from the case 112 by the member attaching device 113 is as follows.
After fitting the external thread 108a of the back cover 108 to the internal thread 112a of the case 112, the special tool is attached to a spanner groove 108b or the like provided on the back cover 108 and screwed in to attach and remove.

[0010]

However, when the back cover 108 is mounted on the case 112 by the member mounting device 113, the direction of the back cover 108 is not constant because the amount of tightening differs depending on the method of tightening the screws. For this reason, on the outer surface side of the back cover 108, as shown in FIG.
When the back cover 108 is screwed to the case 112 and closed completely, the direction of the mark M may be bent as shown in FIG. That is, the direction of the mark M cannot be adjusted. In addition, when attaching and detaching the back cover 108 to and from the case 112 by the member attaching device 113, it is necessary to attach and remove using a special tool, and it takes time and effort.
Since the spanner groove 108b of FIG. 5 is formed on the surface of the back cover 108, the appearance of the back cover 108 is poor.

In addition to this, when the back cover 108 is removed and the repair work is performed when the movement 105 of the wristwatch 101 breaks down, the back cover 108 fixes the middle frame 110, so that the movement 105 There was a problem that it was difficult to work.

On the other hand, in the wristwatch 101 with a power generation device, if the wristwatch 101 is shocked due to accidental dropping or the like, the shock due to the weight of the movement 105 including the power generation device is applied to the case back 108. As a result, the back lid 108 may come off the case 112.

An object of the present invention is to solve the above problems,
Provided is a member mounting device in which the shape of a back cover attached to a case is clear, can be formed into a free shape, the orientation of the back cover can be easily determined at the time of mounting the back cover, and the mechanical part and the like can be easily repaired. It is.

[0014]

According to the first aspect of the present invention, there is provided a member attaching device for attaching a back cover to a case.
A mechanism support ring that supports the mechanism inserted into the case and is detachably attached to the inner wall of the case is provided,
The present invention is characterized in that the back cover is attached to the case by snap-engaging the engagement portion formed on the outer peripheral projection of the back cover with the engagement portion formed on the mechanism support ring.

According to the first aspect of the present invention, the mechanism holding ring that holds the mechanism is fixed by the mechanism support ring. Therefore, when the back cover is removed and a repair operation or the like is performed, the mechanism moves and the work is performed. There is no trouble. Further, the engagement portion for attaching the back cover may be formed in the mechanism support ring, and the mechanism support ring may be attached to the case, so that the processing of the case is easy. Also, since the case and the back cover are not attached to the surface of the back cover, the back cover looks good and can be freely designed. Also, since the member to which the outer peripheral projection of the back lid is snapped is not the case but the mechanism support ring, the mechanism support ring can be snapped even if the case member is a soft material such as synthetic resin or a brittle material such as ceramic. Since an appropriate material can be selected, an appropriate snap fixing force can be secured, and durability can be enhanced.

According to a second aspect of the present invention, there is provided a member mounting device for mounting a back cover to a case, wherein a mechanism support ring is provided to support a mechanism inserted into the case and to be detachably attached to an inner wall of the case. The present invention is characterized in that the back cover is attached to the case by snap-engaging the engaging portion formed on the outer peripheral projection of the back cover with the engaging portion formed on the case other than the mechanism support ring.

According to the second aspect of the present invention, since the mechanism portion is fixed by the mechanism portion support ring, when the back cover is removed to perform a repair operation or the like, the mechanism portion moves and it is difficult to perform the operation. Absent. Further, since the case and the back cover are not attached to the outer surface of the back cover, the back cover has a good appearance and can be freely designed.

According to a third aspect of the present invention, the mechanism support ring is
It is characterized by being screwed to the inner wall of the case with a screw formed on the outer peripheral surface.

According to the third aspect of the present invention, the mechanism support ring can firmly fix the mechanism.

According to a fourth aspect of the present invention, the mechanism support ring is
It is characterized by being bayonet-engaged with the inner wall of the case.

According to the fourth aspect of the present invention, the mechanism support ring can firmly fix the mechanism.

A fifth aspect of the invention is characterized in that the member mounting device according to any one of the first to fourth aspects is applied to a timepiece.

According to the fifth aspect of the invention, in the timepiece, the surface of the back cover is clear and the back cover can be firmly fixed to the case.

According to a sixth aspect of the present invention, in the timepiece according to the fifth aspect, the engaging portion formed on the mechanism support ring is groove-shaped, and the engaging portion formed on the outer peripheral projection of the back cover is a projection. It is characterized by a shape.

According to the sixth aspect of the present invention, the back lid can be attached to the case in a desired direction.

A seventh aspect of the present invention is characterized in that the member mounting device according to any one of the first to fourth aspects is applied to an electronic apparatus.

According to a seventh aspect of the present invention, in the electronic device,
The back lid can be attached to the case in a desired orientation.

[0028]

Preferred embodiments of the present invention will be described below with reference to the drawings.

In the following description, a wristwatch will be described as an example having a member mounting device.
In the following description, in a wristwatch having a preferred embodiment of the member mounting device of the present invention, the front side is a time display side, and the back side is a back cover side opposite to the time display side.

Embodiment 1 FIG. 1 is an enlarged sectional view showing a wristwatch having a first embodiment of the member mounting device of the present invention.

As shown in FIG. 1, the wristwatch 1 has a case 12, a glass rim 3, glass 2, hands 7, a dial 6, a movement 5
(Mechanical part), middle frame 10 (mechanical holding part), screw ring 9
(Mechanical part support ring), a member mounting device 13, a back cover 8, and the like.

The case 12 is the side body of the wristwatch 1 and fixes the glass rim 3 by sandwiching a packing 3 a (glass rim plastic packing) between the case 12 and the glass rim 3. Examples of the material of the case 12 include, for example, generally plated stainless steel or a copper alloy, plastic or an aluminum alloy, furthermore, titanium, a titanium alloy, platinum, a gold material, or a cemented carbide. Can be adopted. The glass edge 3 sandwiches the packing 2 a (glass plastic packing) between the glass 2 and the glass 2 to fix the glass 2.
As a material of the glass 2, sapphire glass, general inorganic glass, acrylic resin, borosilicate glass, or the like can be used.

As shown in FIG. 1, inside the case 12, a dial 6 as a time display portion of the wristwatch 1, a long hand, a short hand,
And a movement 5 having a second hand 7. The movement 5 is an internal mechanism of the timepiece function of the wristwatch 1, and has a liquid crystal display or the like instead of the dial 6 or the like when the wristwatch is of a digital display type.

The movement 5 is held by a middle frame 10 inside the case 12. The outer periphery of the middle frame 10 (also called a spacer or a dial receiving ring) is
The inner frame 10 holding the movement 5 is shaped so as to contact the inner wall of the case 2 (the inner wall of the case).
Movement 5 is brought into contact with the inner wall of case 1
2 inside.

The member mounting device 13 includes the back lid 8 and the case 1
2, a screw ring 9, a groove 9
a (engagement portion), a projection 8b (outer circumference projection), and the like.

The screw ring 9 is for firmly fixing the middle frame 10 holding the movement 5 to the case 12, and is, for example, a cylindrical screw ring. On the outer peripheral portion (outer peripheral surface) of the screw ring 9, a male screw 9b that can be screwed to a female screw 12a formed on the inner wall (inner peripheral portion) of the case 12 is formed. For this reason, the screw ring 9 can be detachably attached to the case 12 by screwing as shown in FIG. The screw ring 9 may be fixed to the case 12 by bayonet fastening (bayonet engagement) instead of screwing.

A groove 9a is formed in the inner peripheral portion of the screw ring 9 as shown in FIG. The groove 9 a is formed in a groove shape partially on the inner peripheral portion of the screw ring 9, preferably over the entire inner peripheral region. The groove 9a is used to securely attach the back cover 8 to the case 12 by the elastic force (snap fixing force) of the protrusion 8b when the back cover 8 is attached to the case 12 when the back cover 8 is attached to the case 12. belongs to.

Since the screw ring 9 is a separate member from the case 12, the wristwatch 1 can be easily manufactured by forming the groove 9a in the screw ring 9. The material of the screw ring 9 includes
For example, stainless steel or copper-based alloy plated,
Titanium, a titanium alloy, a plastic or an aluminum alloy, furthermore, a material such as platinum or gold, or a cemented carbide can be used.

The back lid 8 is a lid portion for attaching to the case 12, and has, for example, a substantially circular shape. The back cover 8 has an inner peripheral portion 8d, an outer peripheral portion 8c, a protruding portion 8b, and the like.

The inner peripheral portion 8d is an inner peripheral portion of the back cover 8, and has, for example, a substantially planar shape. When the back cover 8 is attached to the case 12, the inner peripheral portion 8d is formed with an inner surface 8f facing the inside of the wristwatch 1 and an outer surface 8e facing the outside of the wristwatch 1. A mark M indicating a manufacturer or the like is provided on the outer surface 8e.
Is displayed.

The outer peripheral portion 8c is an outer peripheral portion of the back cover 8. A projection 8b is formed on the outer peripheral portion 8c on the case 12 side.

The protruding portion 8b is a protruding mounting portion of the back cover 8 for fitting into the groove 9a of the screw ring 9 when mounting the back cover 8 to the case 12. The protruding portion 8b is provided on the case 12 of the outer peripheral portion 8c of the back lid 8.
Side (the inner surface 8f side of the inner peripheral portion 8d) is provided partially or entirely around the outer peripheral portion 8c. Projection 8b
Has resilience in the shape of, for example, as shown in FIG. An engagement portion 8h that fits into the groove 9a is formed on the protrusion 8b. The engaging portion 8h is formed by attaching the back lid 8 to the case 12
When attaching to the screw ring 9, the groove 9
It is a part that fits (engages) with a. By attaching the back cover 8 to the case 12, the outer surface 8 of the back cover 8 is provided.
e becomes flat, the outer surface 8e of the back lid 8 can be formed into a free shape, and the appearance is good. Since the outer surface 8e is flat, when the person wears the wristwatch 1 on his wrist, the feeling of wearing is good and the size can be reduced.

When the back cover 8 is attached to the case 12, the back cover 8, the screw ring 9, and the case 12 are integrated and fixed, so that the screw of the screw ring 9 is not easily loosened with respect to the case 12. Further, since the groove 9a is formed, for example, over the entire inner periphery thereof, the direction of the back cover 8 (the direction of the mark M on the surface of the back cover 8) can be set to a desired direction. Although the protrusion 8b and the groove 9a are described as being in the shape of a protrusion and a groove, respectively, they may be in the opposite shape.

The configuration of the wristwatch having the first embodiment of the member mounting device of the present invention has been described above.
Next, the procedure for attaching the back cover to the case is shown in FIG.
1 (A), 2 (B) and 2 (C) will be described with reference to enlarged sectional views near the outer peripheral portion of the wristwatch of FIG.

As shown in FIG. 2A, the projection 8b of the back cover 8 is formed.
Is adjusted to the position of the groove 9a formed in the screw ring 9 attached to the case 12 in advance. Then, when the back cover 8 is further pushed in the Y direction, the vicinity of the tip of the projection 8b comes into contact with the screw ring 9. At this time, the projection 8b, which is an elastic body, slides on the surface 9b while escaping in the X direction as shown in FIG. 2B, and the engaging portion 8h of the projection 8b is The back cover 8 is attached to the case 12 with the packing 8a interposed therebetween by being fitted into the 9a (snap engagement).

Embodiment 2 FIG. 3 is an enlarged sectional view showing a wristwatch having a second embodiment of the member mounting device of the present invention.

In the second embodiment, the description of the same parts as in the first embodiment will be omitted, and only different parts will be described.

The wristwatch 1a has a case 1 as shown in FIG.
2, glass edge 3, glass 2, middle frame 10, movement 5, screw ring 9, back cover 8, member mounting device 13a, and the like.

The member mounting device 13a seals the wristwatch 1a by attaching the back cover 8 to the case 12 as shown in FIG. 3, and includes a screw ring 9, a groove 12a, a projection 8
b etc. In the first embodiment, the position of the groove 9a in which the engaging portion 8h of the projection 8b fits is the screw ring 9 as shown in FIG. 1, whereas in the second embodiment, as shown in FIG. The groove 1 which is a groove-shaped mounting portion in the case 12
2a is formed. The groove 12a is where the projection 8b of the back lid 8 is attached, and the groove 12a is formed partially on the inner surface of the case 12 (the inner wall of the case), preferably over the entire inner circumference.

Thus, the screw ring 9 only fixes the middle frame 10, and it is not necessary to form the groove 12a in the screw ring 9, so that the screw ring 9 can be easily processed.
Further, similarly to the first embodiment, when attaching the back cover 8 to the case 12, it can be attached in a desired direction.

Embodiment 3 FIG. 4 is an enlarged sectional view showing a wristwatch having a third embodiment of the member mounting device of the present invention.

In the third embodiment, the description of the same parts as in the first embodiment will be omitted, and only different parts will be described.

The wristwatch 1b has a case 1 as shown in FIG.
2, glass edge 3, glass 2, middle frame 10, movement 5, screw ring 9, back cover 8, member mounting device 13b, and the like.

The member mounting device 13b seals the wristwatch 1b by attaching the back cover 8 to the case 12 as shown in FIG. 4, and includes a screw ring 9, a groove 9a (engaging portion), a projection 8b (outer peripheral projection). Part). In the first embodiment, as shown in FIG.
2 and fix the middle frame 10 with the screw ring 9, whereas in the third embodiment, as shown in FIG.
Holds a part of the movement 5, and the screw ring 9 is detachably attached to the case 12 while holding the movement 5. The groove 9a is where the projection 8b of the back lid 8 is attached, and the groove 9a is formed partially on the inner surface (inner wall of the case) of the screw ring 9, preferably over the entire inner circumference. Thereby, similarly to the first embodiment, when attaching the back cover 8 to the case 12, it can be attached in a desired direction. In the second and third embodiments, the screw ring 9 may be attached to the case 12 by bayonet engagement.

The present invention is not limited to the above embodiment,
Various changes can be made without departing from the scope of the claims.

The wristwatch described above is, for example, a quartz-vibration watch, and may be of a battery type, a manual winding type, an automatic winding type, or a solar cell type. Such a so-called electronic wristwatch is a kind of timepiece intended by the present invention, and is also a kind of electronic equipment.

The concept of the timepiece in the present invention is not limited to a wristwatch but also includes a table clock and a wall clock.
Not only watches but also other fields or things other than watches, such as cameras, electronic desk calculators, electronic notebooks, portable computers, mobile phones, pagers, The present invention is also applicable to other portable devices.

Furthermore, the concept of a wristwatch is not limited to a so-called electronic wristwatch, but includes a mechanical timepiece such as a hand-wound timepiece or an automatic timepiece.

[0059]

According to the present invention, the shape of the back lid attached to the case is simple and can be formed into a free shape, the orientation of the back lid can be easily determined at the time of attaching the back lid, and the repair of the mechanism and the like can be performed. Is easy.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a wristwatch having a first embodiment of a member mounting device of the present invention.

FIG. 2 is a plan view showing how the back cover is attached in the member attaching device of FIG. 1;

FIG. 3 is an enlarged sectional view of a wristwatch having a second embodiment of the member mounting device of the present invention.

FIG. 4 is an enlarged sectional view of a wristwatch having a third embodiment of the member mounting device of the present invention.

FIG. 5 is a plan view showing a state where a wristwatch having a conventional member mounting device is viewed from the back side.

FIG. 6 is an enlarged sectional view of the wristwatch of FIG. 5 when viewed from a G direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wristwatch 1a Wristwatch 1b Wristwatch 4a Groove (engagement part) 5 Movement (mechanism part) 8 Back lid 8b Projection part (outer circumference projection part) 8h Engagement part 9 Screw ring (mechanism part support ring) 9a Groove (engagement part) 10 Frame (mechanism holding part) 12 Case 13 Member mounting device

Claims (7)

[Claims] 1. A member attachment device for attaching a back cover to a case, comprising: a mechanism support ring that supports a mechanism inserted into the case and is detachably attached to an inner wall of the case.
A member mounting device, wherein a back cover is mounted to a case by snap-engaging an engaging portion formed on an outer peripheral projection of the back cover with an engaging portion formed on the mechanism support ring. 2. A member attachment device for attaching a back cover to a case, comprising a mechanism support ring that supports a mechanism inserted into the case and is detachably attached to an inner wall of the case.
A member mounting device, wherein a back cover is mounted on a case by snap-engaging an engaging portion formed on an outer peripheral projection of the back cover with an engaging portion formed on a case other than the mechanism support ring. 3. The mechanism support ring is screwed to the inner wall of the case with a screw formed on the outer peripheral surface.
Alternatively, the member mounting device according to claim 2. 4. The member mounting device according to claim 1, wherein the mechanism support ring is bayonet-engaged with the inner wall of the case. 5. A timepiece having the member mounting device according to claim 1. 6. The timepiece according to claim 5, wherein the engagement portion formed on the mechanism portion support ring has a groove shape, and the engagement portion formed on the outer peripheral projection of the back cover has a projection shape. 7. An electronic apparatus comprising the member mounting device according to claim 1.