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Tourbillon, movement and timepiece

A technology for tourbillons and watches, applied in the field of tourbillons, movements and watches, can solve the problems of large watches, difficulty in obtaining magnetic resistance, and difficulty in using magnetic materials to cover only the tourbillon, etc. Effect

Active Publication Date: 2017-07-28
SEIKO INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the above-mentioned prior art, since the movement itself is covered with a magnetic material, there is a problem of increasing the size of the timepiece.
In addition, since the tourbillon is a complicated structure that rotates in the movement, it is difficult to cover only the tourbillon with a magnetic material.
[0008] In addition, in the prior art, when the strength of the magnetic field exceeds the saturation magnetic flux density of the magnetic material, the magnetic flux leaked from the magnetic material passes through the magnetic components in the movement.
Therefore, it is difficult to obtain sufficient magnetic resistance

Method used

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  • Tourbillon, movement and timepiece
  • Tourbillon, movement and timepiece
  • Tourbillon, movement and timepiece

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach ＞

[0052] [clock]

[0053] figure 1 It is an external view of the clock 1. In addition, in each drawing shown below, illustration of a part of each member is omitted for convenience of drawing, and each member is illustrated in a simplified form.

[0054] like figure 1 As shown, the timepiece 1 of this embodiment is constituted by incorporating a movement 10 in a timepiece case 3, a dial (not shown) having scales and the like displaying time-related information, various hands (not shown), etc. .

[0055] [movement]

[0056] The movement 10 mainly has a base plate 11 , a front wheel train 12 and a tourbillon 13 . An arbor 15 is assembled in an arbor guide hole (not shown) of the base plate 11 . The stem 15 is rotatable about its axis and movable in the axial direction. In addition, a crown 16 located on the side of the timepiece case 3 is attached to one end portion of the stem 15 (a portion protruding from the movement 10 ). In addition, in the following description, the ...

no. 2 Embodiment approach ＞

[0132] Next, a second embodiment of the present invention will be described. Figure 13 It is a plan view of the frame unit 110 of the second embodiment. In addition, in the following description, the same code|symbol is attached|subjected to the same structure as said 1st Embodiment, and description is abbreviate|omitted.

[0133] exist Figure 13 In the frame unit 110 shown, the pallet fork body 92, the outer pile ring 63 and the speed needle 65 are all magnetic components. The pallet body 92 and the stud ring 63 are arranged such that the angle formed by the straight line connecting the radially outer end surface and the axis O1 becomes 180°.

[0134] In addition, the speed needle 65 is configured to form an angle of 90° with the pallet fork body 92 and the outer pile ring 63 respectively. In this case, the radially outer end surface of the jog arm 111 of the jog hand 65 is positioned radially outer than the frame bottom plate 44 .

[0135]Here, when the pallet body 92 ...

no. 3 Embodiment approach ＞

[0145] Next, a third embodiment of the present invention will be described. This embodiment differs from the above-described embodiment in that the axis centers of the frame shafts 46 and 47 are arranged at positions eccentric to the axis O1 of the frame bottom plate 44 . In addition, in the present embodiment, the stud ring 63 and the demagnetizing member 130 are magnetic members.

[0146] exist Figure 15 In the frame unit 131 shown, the frame shafts 46 and 47 are arranged on the same axis as the axis O2 of the pallet shaft 91 . Furthermore, a degaussing member 130 is provided on the balance with hairspring support 55 . The degaussing member 130 is formed in a plate shape extending in the radial direction.

[0147] Here, let the straight line connecting the radially outer end surface of the outer pile ring 63 (outer pile arm 72) and the axis O2 be the first straight line Lf, and let the straight line connecting the radially outer end surface of the degaussing member 100 a...

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Abstract

A tourbillon, a movement and a timepiece are provided which can obtain excellent magnetic resistance on the basis of inhibiting enlargement. The tourbillion is provided with a frame unit (41) rotating around the axis (O1) of a gimbal axis (46, 47) and carrying a speed governing escapement (45); a first magnetic component being a functional component of the timepiece and extending at the first direction when being overlooked from the axial direction; and a second magnetic component extending at the second direction intersected with the first direction. In overlooking from the axial direction, an angle formed by a first straight line connecting the external side end surface at the first direction of the first magnetic component to the axis (O1) and a second straight line connecting the external side end surface at the second direction of the second magnetic component to the axis (O1) is set to be a range from 60 degrees to 120 degrees.

Description

technical field [0001] The invention relates to tourbillons, movements and timepieces. Background technique [0002] It is known that, in mechanical timepieces, the direction of gravity acting on the balance with hairspring differs according to the change in attitude of the timepiece, thereby causing a speed error (attitude difference). A tourbillon is known as a structure for reducing this difference in attitude. A tourbillon is a part in which a speed-adjusting escapement, which is the main mechanism for determining speed, is mounted on a frame unit, and the frame unit is rotated around a frame axis at a constant cycle. In this way, it is possible to average out the errors in speed due to changes in the posture of the timepiece, and to reduce the difference in posture. [0003] However, when the above-mentioned timepiece equipped with a tourbillon is placed in a magnetic field perpendicular to the frame axis in the plane direction, the frame unit will be accelerated or d...

Claims

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Application Information

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IPC IPC(8): G04B17/28
CPCG04B17/285G04B43/00G04B17/28
Inventor 早川和树木村怜次藤枝久森裕一木村礼子
Owner SEIKO INSTR INC
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