JPH0212627Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a rotating structure used in a watch frame.

[Conventional technology and its problems]

Conventionally, there are clocks in which the clock body is rotatably supported by a frame, but the rotating structure of the clock is, for example, the "hanging clock" disclosed in Utility Model Application No. 57-170295 (Utility Model Application No. 59-74380). There was a structure in which the outer circumference of the watch body was rotatably held between a front frame and a rear frame. According to this structure, unless the dimensional accuracy of the clamping part is strictly controlled, the watch body may be tightly attached to the frame body, or conversely it may wobble, making it difficult to obtain the desired slip torque. .

Furthermore, Japanese Patent Application Laid-Open No. 57-61977 discloses a structure in which the watch body is rotatably attached to the frame body, in which the outer frame body is fitted into an annular guide portion on the back side of the mechanical body mounting plate of the watch body, and the two are connected together. There is a structure in which the external frame is slidably and rotatably connected via a cotter pin and cannot be separated, and a structure in which the outer frame is slidably and rotatably held between the mechanical body mounting plate of the watch body and the back cover fixed to it. Disclosed. However, this structure also has the disadvantage that smooth sliding cannot be obtained and the slip torque varies, similar to the conventional example.

[Purpose of invention]

Therefore, an object of the present invention is to provide a structure that allows stable slip torque to be obtained without strict control of dimensional accuracy and allows for smooth rotation of a watch body.

[Means to achieve the purpose]

In order to achieve the above object, in the present invention, the rear frame is constructed by a front frame having a watch mechanical body on the back side, and a ring plate-shaped case back fixed to the outer periphery of the back side. In the structure in which the rear frame is sandwiched so as to be slidable and rotatable relative to each other, the front side of the rear frame is integrally formed with a ring portion that contacts the sliding surface of the inner surface of the front frame, while the inner surface of the back cover of the rear frame A plurality of elastic bridge portions having hemispherical protrusions that come into contact with the sliding surface on the inner surface of the back cover are formed integrally and symmetrically at positions facing the back cover.

〔Example〕

In FIG. 1, a timepiece 1 is composed of a timepiece body 2 and a frame 3 fixed to the rear thereof. The watch body 2 is rotatable relative to the frame 3, and the frame 3 is rotatably connected to the frame 3 at rotating parts 3a and 3b about its axis. Therefore, various forms can be obtained by rotating the watch body 2 or rotating the frame 3 using the rotating parts 3a and 3b.

Next, the watch body 2 will be explained in detail.

As shown in the second figure, the front frame 4 is integrally formed with a dial plate holder 4a. A dial plate 5 is attached to the front face of the dial plate holder 4a, and a watch mechanical body 6 is fixed to the back side thereof. 7 is a pointer, and 8 is a front cover. A circumferential guide protrusion 4b is protruded from the outer periphery of the watch mechanical body 6 on the back side of the front frame 4. The back surface of the front frame 4 on the outer periphery of the guide protrusion 4b serves as a sliding surface 4c. A ring plate-shaped back cover 9 is fixed to the outer peripheral back surface of the front frame 4 with a set screw 10. The inner peripheral edge of the guide hole 9a of the back cover 9 serves as a sliding surface 9b.

The watch body 2 configured in this manner is rotatable relative to the rear frame 11 by the configuration described below.

The rear frame 11 is held between the front frame 4 and the back cover 9 so as to be relatively slidable and rotatable, thereby allowing the watch body 2 to rotate relative to the rear frame 11. It is something.

As shown in FIGS. 4 to 6, a through hole 11a is formed in the center of the rear frame 11, through which the watch mechanism body 6 passes, and a guide protrusion 4b of the front frame 4 is rotatably formed on the inner surface. A ring portion 11b that fits is formed. A hemispherical protrusion 11c is provided on the front end surface of the ring portion 11b for partially abutting the sliding surface 4c of the front frame 4.
They are formed in four locations at 90 degree center angle intervals. A stepped portion near the outer periphery of the rear frame 11 serves as a guide 11d that rotatably fits into the guide hole 11a of the back cover 9, and a through hole 11e is provided in the outer flange of the guide 11d. Elastic bridge portions 11f are formed on the same plane at four locations on the horizontal centerline and the vertical centerline. The bridge portion 11f is elastically deformable back and forth, and has a hemispherical protrusion 11g that contacts the sliding surface of the back cover 9 at the center of its back side. The protrusions 11g are arranged at equal angular intervals on a concentric circle having a larger diameter than the annular body part 11b, and are positioned at a central angle of 45 degrees with respect to the protrusion 11c of the annular body part 11b. ing.
The protrusion 11g is located on a concentric circumference having a larger diameter than the annular body portion 11b, and the span between the protrusion 11g and the annular body portion 11b is increased. Furthermore, in the rear frame 11,
A latching hole 12 for hanging the watch 1 on a wall or the like and a mounting hole 13 for the frame 3 are formed, and the frame 3 is fixed to the rear frame 11 by a set screw 13a passing through the mounting hole 13.

Next, assembly will be explained.

A dial plate 5 is pasted on the front side of the front frame 4, a watch mechanical body 6 is fixed on the back side, a pointer 7 is attached, and a front cover 8 is attached. Next, fit the guide 11d of the rear frame 11 into the guide hole 9a of the back cover 9 from the front, fix the back cover 9 to the front frame 4 with the set screw 10, and finally attach the frame 3 via the set screw 13a. It is fixed to the rear frame 9. Thereby, the entire timepiece body 2 is rotatably attached to the rear frame 11.

In this installed state, the guide protrusion 4 of the front frame 4
b and the guide hole 9a of the back cover 9, the rear frame 11
The annular body portion 11b and the guide 11d are rotationally guided. Then, the annular body portion 11b of the rear frame 11 is connected to the protrusion 11.
c faces the sliding surface 4c of the front frame 4, while the rear frame 1
The protrusion 11g of the first bridge portion 11f comes into elastic contact with the sliding surface 9b of the back cover 9. While a protrusion 11g is formed on the elastically deformable bridge portion 11f,
The protrusion 11g is located on a concentric circumference with a larger diameter than the annular body part 11b, and the span between the protrusion 11g and the annular body part 11b is increased, so that the slip between the watch body 2 and the rear frame 11 is reduced. In addition to the elasticity of the bridge portion 11f, the elasticity of the rear frame 11 itself also contributes to the generation of torque. For this reason, even if there is some variation in the dimensional accuracy of each component, a proper state of elastic contact is maintained.

[Effect of idea]

According to the structure of the present invention described in detail above, when supporting the watch body so that it can slide and rotate, even if there is some variation in the dimensional accuracy of each component, the desired slip torque can be stably obtained. This allows for smooth sliding of the watch body and reliable friction retention.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention,
Fig. 1 is a front view, Fig. 2 is an enlarged sectional view taken along the line of Fig. 1, Fig. 3 is a further enlarged sectional view of main parts, and Fig. 4
The figure is an enlarged front view of the rear frame, FIG. 5 is an enlarged central vertical sectional view of the rear frame, and FIG. 6 is an enlarged rear view of the rear frame. 2...Clock body, 4...Front frame, 4c...Sliding surface,
5... Dial board, 6... Watch mechanical body, 7... Pointer,
9...Camera back, 9b...Sliding surface, 11...Rear frame, 1
1b...ring body part, 11e...through hole, 11f...elastic bridge part, 11g...protrusion.

Claims (1)

[Claims for Utility Model Registration] A watch body 2, in which a dial 5 and a pointer 7 are provided on the front side of a front frame 4, and a watch mechanical body 6 for driving the pointer is provided on the back side thereof; a ring plate-shaped back cover 9 fixed to the outer periphery of the back of the front frame;
It consists of a rear frame 11 which is held between the front frame and the back cover so as to be slidable and rotatable relative to both, and on the front side of the rear frame, there is a sliding surface 4c on the inner surface of the front frame. An annular body portion 11b that is in contact with the rear frame is integrally formed, and a hemispherical protrusion 11g that is in contact with the sliding surface 9b on the inner surface of the back cover is provided at a position of the rear frame that faces the inner surface of the back cover. A plurality of elastic bridge parts 1 having
A rotating structure of a clock characterized in that 1f is formed integrally and symmetrically.