JPS5822986B2 - Tokeinojikuuke - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a watch bearing using one or two bearing surfaces, and more particularly to improved means for fixing said bearing surfaces to a frame.

There are two types of bearing surfaces: hole stones and receiving stones, and conventionally there is a so-called assembled shaft using these two, as shown in FIG. 1.

This is done by press-fitting and fixing a hole stone to the inner periphery of the lower part of the frame a, and fitting a stone block d to the north of the step C above it, which is pressed by a spring f engaged in a groove e above it. However, this conventional method requires a spring f to fix the stone d, which increases the number of parts, and also has the disadvantage that it takes time and effort to attach and remove the stone d to the frame a.

Therefore, this invention aims to provide a new bearing that does not require any separate parts such as springs to fix the bearing surface, and can be easily and quickly attached to and removed from the frame. An upper plate that presses the upper surface of the screen and a lower plate that supports the lower surface are integrally formed by connecting each other at a part of the periphery, and the bearing surface is press-fitted between the screen plates so that it can be removed. The bearing of the watch is characterized by:

This will be explained in detail below based on the illustrated embodiment.

FIG. 2 shows an example in which the present invention is applied to a so-called silk shaft in which two bearing surfaces, namely a receiving stone 1 and a hole stone are assembled together.

In the figure, numeral 3 denotes a frame, and the entire frame is integrally formed of an elastically deformable material such as synthetic resin or metal.

Its components consist of three parts: two discs 3a and 3b arranged vertically parallel to each other with a predetermined interval, and a connecting part 3c that connects the two at a part of the periphery.
A guide hole 3d is provided at the center of the upper disk 3a, and a mounting hole 3e is provided at the center of the lower disk 3b.

In addition, in the above, the distance A between the upper and lower discs 3a and 3b is somewhat narrower than the thickness B of the center portion of the pedestal 1.

Attaching the bearing surfaces 1 and 2 (in this case, first insert the jewel 1 between the upper and lower discs 3a and 3b from the opposite side of the connecting part 3c, and then press the upper and lower discs 3a and 3b elastically in the direction of external force. Push it to the center position while deforming it.

During this work, look inside the guide hole 3d.
Therefore, when the stone block 1 is advanced to a predetermined position, there will be no mistake, and when the stone block 1 reaches the center position, the curved protrusion 1a on the upper surface will fit into the guide hole 3d, and at the same time the upper and lower The discs 3a and 3b are returned to their original shapes (return to their original shapes) and the stone cap 1 is crimped and fixed in the same position.

Thereafter, the hole stone 2 is fitted and fixed in the mounting hole 3e of the lower disk 3b with a tightening allowance, and the assembly of the assembly shaft is completed.

The stone receiving stone 1 can be easily removed from the frame 3 by pushing the disks 3a and 3b outward.

FIG. 3 shows an example in which the present invention is applied to a bearing using only one bearing stone (in this case, a hole stone).

The differences from the previous time are that the hole stone 2 is press-fitted between the upper and lower discs 3a and 3b, that the lower disk 3b has a mortise hole 3f instead of the mounting hole 3e, and that the hole stone 2 The connecting portion 3c is used as a guide member for positioning the hole stone 2 instead of providing a guide hole in the upper disk 3a as a means for setting the hole stone 2 at the center position.

In addition, in this case as well, the hole stone 2 is the upper and lower disk 3a + 31)
The thickness is greater than the distance A between the two discs, and therefore, when inserted between the discs 3a and 3b, both sides of the hole stone 2 are brought into pressure contact with the two discs, ensuring secure fixation.

Since the present invention has the above-described configuration, there is no need to use a presser spring as in the conventional case when fixing the bearing stone 1 or 2 to the frame body 3.

Therefore, costs can be reduced by reducing the number of parts, and the bearing stone can be mounted and removed more easily and quickly than before, and assembly, disassembly, and cleaning can be performed more efficiently than before.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional example, Fig. 2 is a sectional view showing one embodiment of the present invention, Fig. 3 A is a sectional view showing another embodiment. It is an I line sectional view. 1... Stone receiving stone, 1a... Curved protrusion of the receiving stone, 2...
Anaishi, 3... Frame body, 3a... Upper disk, 3b...
Lower disk, 3c...Connection part, 3d...Guide hole, 3
e...Mounting hole, 3f...Mounting hole.

Claims (1)

[Claims] 1 The upper plate that presses the -1- quotient of the receiving stone and the lower plate that supports the 1ζ surface are connected to each other at a part of the periphery to form a body, thereby creating an insertion part for the bearing surface on the side surface. Along with forming
A bearing for a watch, characterized in that the bearing surface is removably fixed between the drawing plates.