JPH089663Y2 - Structure for fixing the hour wheel holding member of analog clock - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a structure for fixing a hour wheel pressing member of an analog timepiece.

[Conventional technology]

Conventionally, as a means for determining the aki of the hour wheel of an analog timepiece, as shown in FIG. 2, a very thin needle seat 19 made of metal is interposed between the dial 15 and the hour wheel 13 and the spring force thereof is used. A common method was to keep the hour wheel 13 and the day wheel 18 in proper mesh.

Further, in an analog timepiece having a function of displaying the date and the day of the week, as shown in FIG.
A plurality of feet 22 and screws 27 fixed to the main plate 21 by fixing
I fixed it and decided the agaki of the hour wheel 23.

Furthermore, recently, as shown in FIG. 4, a synthetic resin base plate is used.
A method is known in which a plurality of shafts 31-a formed on 31 are thermally or mechanically deformed to fix the hour wheel pressing member 34, and the squeal of the hour wheel 33 is determined.

[Problems to be solved by the device]

However, these conventional techniques have the following problems in structure.

(1) In the case of the needle seat The hour wheel and the needle seat are not fixed to the timepiece body, and they will easily come off until the dial plate is assembled. That is, in the so-called movement OEM that assembles exterior parts at the customer's side,
The hour wheel and the needle seat had to be packaged and shipped separately from the timepiece body, and there was a problem that the number of man-hours for packing and the man-hours required for management increased.

Furthermore, when assembling the hour wheel at the customer's side, it is necessary to engage it with the day wheel and, in order to prevent the day wheel from being destroyed due to improper installation of the hour wheel, the material for the day wheel is made to be strong. Limited to strong to some extent.

Also, the spring force of the needle seat must be so weak that it does not hinder the rotation of the hour wheel, so it is not possible to sufficiently absorb the variation in the again of the hour wheel due to warping of the dial, etc. There was also a risk of disengagement between the hour wheel and the back wheel of the day and causing a stop due to no wheel wheel again.

(2) Fixing with screws Although the hour wheel pressing member is fixed to the watch body with a plurality of screws, the above-mentioned problems are solved, but since a plurality of screws for fixing are required, the number of parts is reduced. It increases and leads to cost increase.

(3) Fixing of Synthetic Resin Base Plate by Shaft In recent years, in order to solve the above problems, a method of fixing the hour wheel holding member by thermally or mechanically deforming the shaft provided on the synthetic resin base plate. Was devised, but according to this,
The material that can be used for the ground plate to deform the shaft of the ground plate must be a relatively soft resin that can be easily deformed (for example, polycarbonate), and the shaft of the fiber-reinforced composite material that has been conventionally used for the ground plate Since it does not deform well and cannot be applied, it has a big problem in terms of strength as a ground plane.

Therefore, the present invention solves these problems at once, and the purpose thereof is to incorporate the hour wheel and hour wheel pressing member in the timepiece base plate of any material using the foot without increasing the number of parts. It is in the place of supplying the clock body which was made.

[Means for solving the problem]

An analog timepiece wheel holding member fixing structure for an analog timepiece according to the present invention comprises a main plate which is a timepiece base frame, and a metal foot which is fixed to the main plate and receives a fixing screw for fixing a front structural member of a timepiece body.
It has a hour wheel that is a back constituent member connected to the hour hand, and a hour wheel pressing member that regulates slack in the axial direction of the hour wheel, and the hour wheel pressing member is with respect to the back end of the foot. It is characterized by fixing by caulking.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention, in which 1 is a base plate which is a timepiece base frame, 2 is a plurality of metal support legs fixed to the base plate, and 3 is an hour hand. The hour wheel 4 is a hour wheel pressing member that determines the axial clearance of the hour wheel.
Reference numeral 5 is a dial, and 6 is a screw that engages with the foot.

Here, the foot 2 engages with the screw 6 to hold and fix the front constituent member of the timepiece, while the convex portion 2-formed in a ring shape.
The hour wheel pressing member 4 is caulked and fixed by plastically deforming a with chisel or the like.

That is, the hour wheel pressing member 4 is fixed by the metallic support foot 2 regardless of the material of the main plate, and the slack in the cross-sectional direction of the hour wheel 3 is appropriately maintained.

[Effect of device]

As described above, according to the hour wheel presser member fixing structure of the present invention, the hour wheel presser member is caulked and fixed to the rear end of the metal foot, without increasing the number of parts. The hour wheel and hour wheel pressing member can be incorporated into the timepiece body without any limitation on the material of the main plate, and the number of packing steps and management steps can be reduced.

In addition, since the metal foot is fixed by crimping, a stronger fixing force can be obtained with a smaller amount of crimping than when fixing the shaft of the base plate made of synthetic resin by deformation, so it can be used when dropping or removing the hour hand. It also has an effect of preventing the push-wheel assembly pressing member from coming off.

[Brief description of drawings]

 FIG. 1 is a sectional view showing an essential part of an embodiment of the present invention. 2 to 4 are cross-sectional views of a main part showing a conventional example. 1, 21, 31 ...... Base plate 2, 22 ...... Foot 3, 3, 13, 23, 33 ...... Cylinder wheel 4, 24, 34 ...... Cylinder wheel pressing member 5, 15 ...... Dial 6 ...... Screw 27 ... … Screws 18 …… Behind the wheel 19 …… Needle seat

Claims (1)

[Scope of utility model registration request] 1. A main plate which is a timepiece base frame, a metal foot which is fixed to the main plate and receives a fixing screw for fixing a front constituent member of a timepiece body, and an hour wheel which is connected to an hour hand which is a rear constituent member. And an hour wheel pressing member for restricting agitation in the axial direction of the hour wheel, wherein the hour wheel pressing member is fixed by caulking to the rear end of the foot. Fixed structure for the car presser member.