Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Timepiece

A technology of clocks and components, which is applied in the field of clocks and watches with relaxed gear trains, can solve the problems of poor precision, small swing angle of governor, and inability to ensure energy, etc., and achieve the effect of stable precision and extended duration

Inactive Publication Date: 2008-10-01
SEIKO EPSON CORP
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, in conventional mechanical timepieces, when the torque becomes smaller on the unwinding side of the mainspring, the swing angle of the balance wheel constituting the governor becomes smaller and the accuracy deteriorates.
In addition, in the case of an electronically controlled mechanical timepiece, as the torque for driving the generator becomes smaller, the energy necessary for power generation cannot be secured, so there is a problem that the duration cannot be extended.
[0009] Conversely, on the winding side of the mainspring, although a high torque is not output sharply, in mechanical timepieces, the swing angle of the balance wheel becomes larger, resulting in poor accuracy.
In addition, in the case of an electronically controlled mechanical timepiece, there is a possibility that the dynamic brake alone may exceed the control range, and the accuracy cannot be guaranteed.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Timepiece
  • Timepiece
  • Timepiece

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0048] figure 1 A schematic plan view showing the timepiece 1 according to the first embodiment of the present invention. in the figure 1 Among them, the clock 1 is an electronically controlled mechanical clock, which has: a mainspring 10; a drive train 20 driven by the mechanical energy of the mainspring 10; 30.

[0049] The mainspring 10 is accommodated in a barrel 11, which is configured such that, when the timepiece 1 is a hand-wound timepiece, the outer end of the mainspring 10 is fixed to a barrel gear 12 formed on the outer periphery of the barrel 11, and , when the timepiece 1 is a self-winding timepiece, the outer end of the mainspring 10 abuts against the inner circumference of the barrel 11, and when a torque of more than a predetermined value is added, the movement of the mainspring 10 relative to the barrel 11 Slip inside. In addition, the inner end of the mainspring 10 is fixed on the barrel center shaft 13 provided at the center of the barrel case 11. The ba...

no. 2 approach

[0069] Below, refer to Figure 5 And FIG. 6 explains the second embodiment of the present invention. In this embodiment, the structure of the pressing member which applies torque to a sun gear differs from 1st Embodiment.

[0070] Figure 5 It is a top view showing the main part of the timepiece of this embodiment. The sun lever 80 is fixed to the rotation shaft of the sun gear 87 which is an output wheel in this embodiment.

[0071] The sun rod 80 extends from its rotation center to a position beyond the periphery of the sun gear 87 in a direction intersecting the rotation direction of the sun gear 87 , and rotates in synchronization with the rotation of the sun gear 87 . Here, about Sun Rod 80, at Figure 5 The position indicated by the dashed-two dotted line indicates the sun lever 80 when the mainspring 10 is substantially wound up, and the position indicated by the solid line indicates the sun lever 80 when the mainspring 10 is generally unwound to reach the end of th...

no. 3 approach

[0081] Next, refer to Figure 7 A third embodiment of the present invention is described through FIG. 9 . In the first embodiment, the sun lever is directly pressed by the pressing member (spring member 71 ), but in this embodiment, the pressing member presses the sun lever through another member.

[0082] Figure 7 It is a top view showing the main part of the timepiece of this embodiment.

[0083] The sun rod 80 is provided with a slide member 92 and a guide member 93, the slide member 92 can move linearly along the direction connecting the rotation center side and the outer side of the sun rod 80, and the guide member 93 can move approximately along the direction of the sun rod 80. The slide member 92 is guided in the chord direction of a circle centered on the rotation center of the rod 80 .

[0084] In the guide member 93 , an elongated hole 930 that engages with a protrusion included in the slide member 92 is formed. One end portion 931 of the guide member 93 is pivo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A timepiece having an output wheel that is rotated by torque output from the mainspring, a lever that pivots synchronously to the output wheel, and a pressure member that pushes the lever. The pressure member pushes the lever so that the output torque of the output wheel increases as the mainspring unwinds.

Description

technical field [0001] The present invention relates to a timepiece, and more particularly to a timepiece having a winding train driven during winding of a mainspring and an unwinding train driven during unwinding. Background technique [0002] As a wristwatch (wristwatch) that drives a wheel train using a mainspring as a mechanical energy source, in addition to conventional mechanical timepieces, an electronically controlled mechanical timepiece described in Patent Document 1 has been known in recent years. Generally, when the mainspring used in these clocks is wound up at the end of the winding, as shown by the solid line A in Fig. 4, the torque accumulated in the mainspring increases sharply, and when the mainspring starts to be released, the output Very large torque, so the governor or escapement, etc., which controls the rotational speed of the wheel train rotated by the mainspring, is applied with a large torque, and these parts may be damaged. [0003] Therefore, esp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G04B1/22G04C10/00
Inventor 永坂荣一
Owner SEIKO EPSON CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com