JPH0140101Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a button structure for an external operation part of a mobile watch that operates a switch mechanism at the tip of the button shaft by sliding the button used for external operation of the mobile watch in the axial direction. It is.

Conventionally, when attaching a crown with a screw lock to a mobile watch case, it was known that the threaded part of the crown was engaged with the threaded part provided on the button pipe, but in this case, the crown surrounded the button pipe. As a result, it had a large diameter, was bulky, and was difficult to operate.

The present invention aims to eliminate these drawbacks, and its purpose is to provide a compact and waterproof button structure for a portable watch.

The gist of the present invention is: - The body 11; - The button pipe 12 fixed to the body 11; - The button shaft 13 inserted into the button pipe 12 and arranged to be movable in the axial direction; - The button shaft 13. A button head 16 that is engaged on the outer end side; - A button stop ring 15 that is engaged on the inner end side of the button shaft 13; - The button shaft 13 has a non-circular cross section on the inner end side. A groove portion 13b having a shape and a collar portion 13d on the outer end side
and a threaded portion 1 formed on the outside of the collar portion 13d.
3e is formed; - The button retaining ring 15 is formed in a hairpin shape with dimensions that can be inserted into the groove 13b, and a partial The button head is formed such that a portion thereof enters the notch 12a and the rotation of the button shaft 13 is prevented by engagement between a portion of the button retaining ring 15 and the notch 12a. The portion 16 is formed with a center side 16a that protrudes inwardly toward the center and is elastically deformable in the radial direction, and the button shaft engaging hole 1 having an inner diameter larger than the outer diameter of the collar portion 13d is formed in the center shaft 16a.
6b, and a button shaft slip-off prevention collar portion 1 having an inner diameter smaller than the outer diameter of the collar portion 13d on the inside of the tip.
6c is formed, and the button shaft engagement hole 16b
At the bottom of the button shaft 13 there is a threaded portion 13e at the outer end of the button shaft 13.
A screw hole portion 16e is formed to be screwed into the button shaft, and when the screw portion 13e and the screw hole portion 16e are deeply screwed together, the center shaft 16a is elastically deformed outward and the button shaft is pulled out. When the prevention flange 16c is inserted inside the flange 13d over the flange 13d and the screw engagement is shallow, the innermost end of the button head 16 and the stopper surface 18, such as the stepped inner surface of the button pipe 12, In the case where the button input stroke L is ensured between the two buttons, and the screw engagement is deep, the innermost end of the button head 16 moves inward, and the dimensional relationship is set such that the button input stroke L is not ensured. This is the button structure of a mobile watch featuring:

The present invention will be explained by way of examples. FIG. 1 is a partial sectional view showing an embodiment of the present invention, in which a shows the button when it can be slid and b shows when the button is locked. A button shaft 13 made of metal, plastic, etc. is slidably attached to a button pipe 12 that is watertightly attached to a watch body 11 by brazing, gluing, etc. via a packing 14 held in a packing groove 13a. has been done.

A groove 13b having a non-circular cross-sectional shape is provided at the tip of the button shaft 13, and a button retaining ring 15 has an inner diameter corresponding to the groove shape and is larger than the inner diameter of the button pipe in at least one place.
is attached to the button shaft 13 in a non-rotatable manner. At the tip of the button pipe, a notch 12a is provided in an outer shape portion having a depth corresponding to the thickness of the button retaining ring 15 and larger than the inner diameter of the button pipe of the button retaining ring 15. A button retaining ring 15 is engaged in the portion 12a. A collar portion 13d having a tapered surface 13c on the head side is provided on the button shaft head side, and a threaded portion 13 is provided at the button shaft head end outside the collar portion 13d.
e is provided. A button shaft engagement 16b having an inner diameter larger than the outer diameter of the button shaft flange portion 13d is provided on the central shaft 16a (which can be elastically deformed in the radial direction) of the button head 16 which is separate from the button shaft 13, A button shaft slip-off prevention flange 16c having an inner diameter smaller than the outer diameter of the button shaft flange 13d is provided at the open end of the button shaft engaging hole 16b, and a button shaft tapered surface 13c is provided on the tip side. A tapered surface 16d for sliding is provided. A screw hole portion 16e corresponding to the button shaft threaded portion 13e is provided on the inner bottom surface of the button shaft engagement hole 16b,
The button shaft 13 and the button head 16 are threadedly engaged in the threaded portion. A knurled groove 16f is provided on the outer peripheral surface of the button head. 17 is a coil spring for returning the button, and L is a button input stroke. FIG. 1c shows a cross-sectional view of the button retaining ring portion, and shows the groove 13 of the button shaft having a non-circular cross-sectional shape.
A button retaining ring 15 having an inner shape corresponding to the groove shape is attached to the groove 13b.
a recessed opening end 15a having an inner diameter smaller than the minimum axial width of the part; and an attachment/detachment protrusion that is located on the opposite side of the recessed opening end 15a and has a hole shape for hooking a tapered jig for attachment/detachment. 15b is engaged with a button pipe notch 12a provided at the tip of the button pipe. In this embodiment, by engaging the threaded portion at the end of the button shaft head with the threaded portion provided in the button shaft engagement hole of the center shaft of the button head, and advancing the screw engagement, the button shaft flange is assembled. The button is formed in a state in which the part 13d and the button shaft detachment prevention flange 16c (the button shaft flange is inserted by elastic deformation in the radial direction) are completed, and the button is assembled with a gasket and a button. Insert the button into the button pipe with the return spring attached, and engage the button retaining ring with the button shaft groove to complete the button attachment. This state is a state in which the button can be slid, and by pushing the button head, the tip of the button moves inward to activate the switch spring, and when the pushing force is removed, the button is returned to its initial position by the repulsive force of the button return spring. When the button is locked, by rotating the button head, the button retaining ring hits the wall of the notch at the tip of the pipe and prevents the button shaft from rotating, so the threaded engagement between the button shaft and the button head progresses, and the button head When the inner end surface of the part comes into contact with the button pipe surface, locking is completed and the button is in a state where it cannot be slid. To release the lock, simply rotate the button head in the opposite direction until the button shaft collar and the button shaft slip-out prevention collar come into contact. FIG. 2 is a partial sectional view showing another embodiment of the present invention, in which the button shaft is prevented from coming off by a button shaft slip-off prevention ring 28 made of metal, plastic, or the like. In this case, after the threaded part on the button shaft side is screwed into the screw hole on the button head side, the button shaft slip-off prevention ring is fixed to the tip of the button head center shaft by caulking or adhesive. . 23 is a button shaft, 26 is a button head, and M is a button input stroke and a button lock stroke.

In addition, the button shaft retaining flange of the present invention is the first
It includes the integral button shaft slip-off prevention collar 16c shown in the figure and the separate button slip-off prevention ring 28 shown in FIG.

According to the present invention, the button is divided into two parts, the button head and the button shaft, and the button retaining ring is engaged with the non-circular groove on the inner end of the button shaft, without changing the original configuration of the button part. The outer end is formed into a hairpin shape that can be engaged with the notch on the inner end side of the button pipe, so even if the button head is rotated, the button shaft will not rotate, and the button head can be rotated. By screwing the button into engagement with the button shaft, a reliable button lock state can be obtained while maintaining the basic qualities of the button, such as slidability within the button pipe and waterproofness. Furthermore, the button may be a normal button consisting of a button head and a button shaft, and since the button lock is formed by the button shaft, a hairpin-shaped button retaining ring, and a notch in the button pipe, the button part has a small diameter and is compact. Moreover, the lock operation becomes easy and simple. In particular, since the button retaining ring portion is formed in the shape of a hairpin, it has spring properties, and is extremely easy to attach and detach from the button shaft. In particular, since the outer end extends to the notch on the outer circumference of the button pipe, the spring length can be ensured long, the spring force is stable, it locks the button shaft, and it is very easy to attach and detach from the button shaft. It will be good. Furthermore, since the lock operation is performed by rotating the outer periphery of the button head that protrudes the most from the case, the protrusion of the button part from the case can be minimized.

As described above, the present invention provides a reliable button lock structure with a simple structure and easy operation, and is therefore very useful.

[Brief explanation of the drawing]

Figures 1a and b... A partial cross-sectional view showing one embodiment of the present invention. Figure 1 c... A partial side cross-sectional view showing one embodiment of the present invention. Figure 2... Another embodiment of the present invention. FIG. 11,21...Body, 12,22...Button pipe, 13,23...Button shaft, 14,24...Putskin, 15,25...Button retaining ring, 1
6, 26... Button head, 17, 27... Button return spring, 28,... Button removal prevention ring.

Claims (1)

[Claims for Utility Model Registration] A body, a button pipe fixed to the body, a button shaft inserted into the button pipe and arranged to be movable in the axial direction, and a button shaft connected to an outer end side of the button shaft. The button head has a button head that is fitted together, and a button retaining ring that is engaged with the inner end of the button shaft, and the button shaft has a groove having a non-circular shape on the inner end and a groove on the outer end. a flange portion and a threaded portion formed on the outside of the flange portion; the button retaining ring is formed in a hairpin shape with a size that can be inserted into the groove portion; A portion thereof enters a partial notch formed on the inner end side of the button pipe, and rotation of the button shaft is prevented by engagement between a portion of the button retaining ring and the notch. The button head is formed with a center shaft that protrudes inwardly toward the center and is elastically deformable in the radial direction, and the center shaft has an inner diameter larger than an outer diameter of the collar. A button shaft engagement hole and an integrated or separate button shaft slip-off prevention collar portion having an inner diameter smaller than the outer diameter of the collar portion are formed inwardly at the tip, and the bottom of the button shaft engagement hole is provided with the button shaft engagement hole. A screw hole portion is formed to be screwed into the threaded portion at the outer end of the shaft, and by advancing the screwing engagement between the screw portion and the screw hole portion, the central shaft is elastically deformed outward, and the central shaft is elastically deformed outward. If the button shaft slip-off prevention flange is inserted inside the flange over the flange and the screw engagement is shallow, the innermost end of the button head and the stopper surface such as the stepped inner surface of the button pipe If the button input stroke L is secured between the buttons and the screw engagement is deep, the innermost end of the button head moves inward, and the dimensional relationship is set such that the button input stroke L is not secured. The key feature of the mobile watch is its button structure.