JPH0120884Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for a metal band of a wristwatch.

[Conventional technology]

A typical metal band mounting structure for conventional wristwatches is such that a through hole is provided at the tip of the band, a spring bar is passed through the through hole, and the spring bar is attached to the spring bar mounting hole at the end of the case.

[Problem that the invention attempts to solve]

In this conventional metal band mounting structure, the outer diameter of the spring bar itself cannot be reduced due to the complexity of the structure, and the tip of the band cannot be made thin. The material protrudes in the thickness direction from the surface of the material, detracting from its appearance.

In addition, in order to attach the band to the case integrally without any gaps, the common method is to use the elasticity of the entire spring bar, but the spring bar must be bent strongly during attachment. Installation and removal were extremely difficult.

The object of the present invention is to eliminate the above-mentioned drawbacks and provide a structure that allows a metal band to be easily and firmly attached to a thin case without gaps.

[Means for solving problems]

Pins are implanted on the inner surfaces of the opposite horn legs of the watch case, and locking members are fixed to the back of the case attachment part of the band, and the locking members are placed on both sides at positions facing the pins toward the bottom surface. An inverted U-shaped locking groove that opens at the bottom, a sloped surface on at least a part of the end surface that contacts the case, and a screw hole on the bottom surface, and the stop plate has a tapered elastic tongue piece curved at both ends and a flat plate in the middle. A through hole is formed in the surface at a position opposite to the screw hole, and the elastic tongue of the stop plate is inserted into the gap between the case and the slope of the locking member from the lower surface direction of the band where the pin and the engagement groove are engaged. Then, a part of the flat plate surface of the intermediate part is screwed into the locking part with a part of the flat plate surface in contact with the lower surface of the case.

〔Example〕

The present invention will be explained in detail below based on the drawings.
1, 2a and 2b show an embodiment of the present invention, and FIG. 1 is a perspective view showing the band before it is attached to a wristwatch case.

Reference numeral 1 denotes a band, and a locking member 2 is brazed and fixed to the case attachment part of the band 1, and on both sides of the locking member 2, there is an inverted U that opens toward the bottom.
A letter-shaped engagement groove 2a is bored, and a slope 2 is formed on at least a part of the end surface of the locking member 2 that contacts the case 3.
A screw hole is provided on the bottom surface and b. On the other hand, a pin 4 is implanted on the inner surface of each of the horn legs of the case 3, and the band 1 is inserted into the engagement groove 2 from above the case 3.
a so that it engages with the pin 4 of the case 3.

Figures 2a and 2b show the band attached to the wristwatch case, with Figure 2a being a partial sectional view and Figure 2b being a partial back view.

A retaining plate 5 is fixed to the back surface of the locking member 2 of the band 1 with two screws 6 after assembly. Both ends 6a of the stop plate 5 are shaped like curved tapered tongues having elasticity, and are configured to fit into the space 7 between the case 3 and the slope 2b of the locking member 2 from the lower surface in a wedge shape. On the other hand, the flat plate surface of the intermediate portion 5b between both ends 6a of the stopper plate 5 has a through hole at a position opposite to the screw hole, so that when the stopper plate 5 is screwed onto the locking member 2 of the band 1. , a part of the plate surface contacts the lower surface of the case 3 and pushes up the lower surface of the case 3. The curved tapered elastic tongues at both ends 6a of the stop plate 5 function to rotate the band 1 about the pin 4 in the direction of arrow A and always press the upper part of the band 1 against the end of the case 3, thereby securing the mounting portion. This absorbs dimensional errors. On the other hand, when a moment is applied to rotate the band 1 about the pin 4 in the direction opposite to the arrow A, the wedge effect can provide strong support, and the relatively weak downward force on the band 1 can be It is supported by the intermediate portion 5b of the stop plate 5.

On the other hand, when a moment is applied to the band 1 in the direction of arrow A, most of the moment is supported by the upper end of the band 1, the contact part of the case 3, and the pin 4, and a relatively weak upward force is applied to the band 1. is supported by the intermediate portion 5b of the stop plate 5.

In this embodiment, the locking member is fixed to the back surface of the case attachment part of the band, but it goes without saying that the same effect can be achieved even if the locking member is integrally formed with the band from the beginning.

[Effect of idea]

As is clear from the above explanation, according to the present invention,
engaging the pin of the case with the engagement groove formed in the locking member of the band, and screwing a stop plate having an elastic tongue tapered from the lower surface of the band and the case to the locking member;
Furthermore, since the elastic tongue pieces fit into the gap between the case and the slope of the band, the band can be firmly fixed to the case without any gaps, and even on thin watch cases, the mounting part can be attached to the case. It has become possible to create a wristwatch with an elegant appearance without protruding from the bottom surface. Furthermore, the metal band can be easily attached and detached, and a strong band attachment structure with a sense of unity between the case and the band has been realized, which is highly effective.

[Brief explanation of drawings]

Figures 1 and 2 a and b show embodiments of the present invention;
Figure 1 is a perspective view of the band before it is attached to the watch case, Figures 2 a and b show the band installed to the watch case, Figure 2 a is a partial sectional view, and Figure 2 b is a partial back view. It is a diagram. DESCRIPTION OF SYMBOLS 1... Band, 2... Locking member, 2a... Engagement groove, 2b... Slope, 3... Case, 4... Pin,
5... Stopping plate, 5b... Middle part, 6... Screw, 6
a...Both ends, 7...Gap.

Claims (1)

[Scope of utility model registration request] Pins are implanted on the inner surfaces of the opposite horn legs of the watch case, and locking members are fixed to the back of the case attachment part of the band, and the locking members are placed on both sides at positions facing the pins toward the bottom surface. An inverted U-shaped engagement groove that opens at the bottom, a sloped surface on at least a part of the end surface that contacts the case, and a screw hole on the bottom surface, and the stop plate has a tapered elastic tongue piece curved at both ends and a flat plate in the middle. A through hole is formed in the surface at a position opposite to the screw hole, and the elastic tongue of the stop plate is inserted into the gap between the case and the slope of the locking member from the lower surface direction of the band where the pin and the engagement groove are engaged. A wristwatch band attachment structure characterized in that the locking member is screwed into the locking member with a part of the flat plate surface of the intermediate portion in contact with the lower surface of the case.