JP6124975B2 - bearing - Google Patents

Description

  The present invention relates to a bearing for a movable part capable of rotating or translating in a timepiece having a movement on a fixed part.

  It is known to use rolling or sliding bearings to support moving parts that can be rotated or translated. Especially when rolling bearings are used, the bearings have a relatively heavy weight, and a large movement is applied to the movement due to the sudden movement of moving parts, for example in the digital display of a watch, which causes damage. There is a drawback that it may be.

  The object of the present invention is to reduce the weight and the required space in a bearing of the type described at the outset and to facilitate installation and adjustment.

  This problem is solved by the first solution of the present invention, in which the moving part has one or more edges extending along its movement path and having a constant cross section, A plurality of bearing rollers provided with notches arranged at intervals on the edge and extending in the circumferential direction are engaged. The bearing according to the present invention further extends at right angles to the moving path of the movable part, and provides friction resistance in the axis line around which the bearing roller is rotatably supported and in the bearing concave part of the fixed part of the watch. And a bearing projection that is supported so as to be rotatable while being received and extends eccentrically in the axial direction with respect to the axis.

  The above-described problem is also solved by the second solving means of the present invention. In this case, the fixed component extends along the moving path of the movable component and has one or more cross sections having a constant cross section. A plurality of bearing rollers each having an edge and having a notch extending in the circumferential direction and spaced from each other are engaged with the edge. The bearing according to the present invention further extends at right angles to the moving path of the movable part, and provides frictional resistance in the axis line around which the bearing roller is rotatably supported and in the bearing recess of the movable part of the watch. And a bearing projection that is supported so as to be rotatable while being received and extends eccentrically in the axial direction with respect to the axis.

  According to the solution described above, it is possible to realize a bearing having a small weight and a required space. Furthermore, since the bearing friction is small, the braking torque due to this bearing friction is also small.

  At the time of attachment, the shaft and the bearing roller are arranged at a position separated from the end position by rotating the bearing protrusion first. As a result, it is possible to fit the part for engaging the notch of the bearing roller into the same plane as the bearing roller without any trouble. Thereafter, by rotating the bearing protrusions, the bearing rollers are engaged with each other until the bearing rollers are arranged in the optimum positions with respect to the engaging parts and the notches of the bearing rollers are engaged with the edges of the mounting parts. Move towards the joint part.

  The bearing according to the present invention requires a small amount of space and has wear resistance.

  Due to the notches in the bearing rollers, the moving parts are guided with a slight backlash.

  If the cross section of the notch of the bearing roller is V-shaped, the movable part is guided with particularly little backlash.

  The fixed part may have a circular and circumferentially extending edge with respect to the rotary bearing, and the bearing roller and the notch thereof may be engaged.

  The translatable movable part can be configured as a lever extending in the longitudinal direction. In this case, the bearing roller and its notch are supported so as to be able to translate by engaging with two edges in the longitudinal direction of the lever.

  The guide by a slight backlash in the movable part can be further improved if the cross section of the edge extending along the moving path of the movable part is formed in a V shape.

  The movable part can have two surfaces that are plane parallel to each other.

  If the fixed part is configured as a movement plate in the watch and extends parallel to the plane parallel surface of the movable part, the plate has two functions, so that space can be saved. .

  In order to be able to adjust the rotation of the bearing projections coupled to the shaft, these bearing projections can have a rotating recess for engaging the tool to rotate the bearing projection.

  In a simplified configuration, the rotating recess is a slit formed on the end surface of the bearing projection so as to be orthogonal to the axis, and a driver can be inserted therein.

  The rotatable movable part is configured as a toothed ring and can be rotatably supported at the edge of a stationary part extending in the circumferential direction. In this case, the toothed ring can be concentrically coupled to the dial in the digital display portion of the watch.

  The coupling of the toothed ring and the dial can be easily performed by using screws.

  If the toothed ring and the dial are arranged parallel to each other with a space therebetween, and the bearing roller and the fixed part are arranged in the space between the toothed ring and the dial, the required space is extremely small. Can do.

  The dial can be the time display board of the digital display part of the watch.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

It is a top view of the timepiece unit comprised with a toothed ring, a time display board, and the rotary bearing on the time display board combined with the toothed ring. It is sectional drawing of the 1st detail of the unit which concerns on FIG. FIG. 3 is a cross-sectional view of a second detail of the unit according to FIG. 1. FIG. 4 is a cross-sectional view of a third detail of the unit according to FIG. 1. It is a top view of the lever supported by the timepiece in translation.

  The unit shown in FIGS. 1 to 4 includes a toothed ring 1 having internal teeth 2. The toothed ring 1 has six flange portions 3 that are evenly provided on the outer periphery and project radially. Each flange portion 3 is formed with a long hole 4 extending in the circumferential direction.

  Since these flange portions 3 are thicker than the toothed ring 1, they protrude from the toothed ring 1 to one side in the axial direction.

  An annular time display board 5 is provided on the end face of the flange portion 3 on the protruding side. Regarding the time display board 5, the outer diameter is larger than the outer diameter of the flange portion 3, and the inner diameter is smaller than the diameter of the inner teeth 2 of the toothed ring 1. Since the flange portion 3 protrudes, an annular gap 12 is formed between the toothed ring 1 and the time display board 5.

  The time display board 5 is formed with a step-like through hole 6 that overlaps the central region of the long hole 4 and has a diameter corresponding to the width of the long hole 4. The large steps of these through holes 6 are located on the time display board 5 on the opposite side to the flange portion 3.

  A bush 7 in which a female screw is formed is fitted in the through hole 6. These bushes 7 have flanges 8 that reach the long holes 4, project outward in the radial direction on the side opposite to the flange portions 3, and are fitted in large steps of the through holes 6.

  The screw 9 is guided in the through hole 6 from the side opposite to the time display board 5 and is fastened to the female screw of the bush 7 until the screw head 10 contacts the flange portion 3 on the side opposite to the time display board 5. . Thereby, the toothed ring 1 and the time display board 5 are firmly connected to each other.

  With respect to the toothed ring 1, a time plate 11 is arranged coaxially and fixedly for the movement of the watch. The plate 11 passes through the time display board 5. Furthermore, the free end of the plate 11 has an annular flange 13 which projects into the annular gap 12 and extends radially. The edge 14 of the annular flange 13 extending in the circumferential direction has a V-shaped cross section.

  On the concentric pitch circle in the toothed ring 1, three bearing recesses 15 formed as perforations are evenly arranged. Bearing projections 16 are fitted into the bearing recesses 15, and the bearing projections 16 can be adjusted for rotation in the bearing recesses 15 when a certain frictional resistance is exceeded.

  A shaft pin 18 is disposed on the bearing protrusion 16, and an axis 19 of the shaft pin 18 extends eccentrically with respect to the longitudinal axis 17 of the bearing protrusion 16 and extends into the annular gap 12.

  A bearing roller 20 is rotatably supported on the shaft pin 18. A cutout 21 is formed on the outer periphery of these bearing rollers 20 and has a V-shaped cross section corresponding to the V-shaped cross section of the annular flange 13.

  In order to be able to rotate the bearing protrusions 16, clover-like recesses 22 into which the corresponding tools can be inserted are formed on the end surfaces of the bearing protrusions 16. With this tool (not shown), the bearing projection 16 can be rotated about its longitudinal axis 17.

  Since the axis 19 of the shaft pin 18 is eccentric with respect to the longitudinal axis 17 of the bearing projection 16, the bearing roller 20 is positioned away from the edge 14 of the annular flange 13 extending in the circumferential direction (see FIG. 3), The cutout 21 extending in the direction can be adjusted between a position (see FIG. 4) that accommodates the edge 14 of the annular flange 13 that also extends in the circumferential direction. At these positions, the unit constituted by the time display board 5 and the toothed ring 1 is rotatably supported on the annular flange 13.

  At the time of assembly, the hour plate 11 having the annular flange 13 is first arranged on the time display board 5, and then the toothed ring 1 having the flange portion 3 is arranged on the time display board 5, and the time display board 5 and screw Join. In this case, the bearing roller 20 needs to be arranged at a position separated from the edge 14 of the annular flange 13 extending in the circumferential direction.

  After the toothed ring 1 and the time display board 5 are screwed together, the three bearing protrusions 16 are all rotated sequentially in the same step, with minimal play between the notch 21 and the edge 14. The bearing roller 20 is moved toward the annular flange 13 until it remains. As a result, the unit constituted by the time display board 5 and the toothed ring 1 is rotatably supported on the annular flange 13.

  In the embodiment shown in FIG. 5, an arcuate lever 23 is supported along the arcuate path 24 so as to be capable of translational movement.

  In this case, the edge 14 ′ in the radially outer end regions 25, 26 and the edge 14 ′ in the radially inner central region 27 are configured to correspond to the edge 14 shown in FIGS. ing.

A bearing roller 20 ′ corresponding to the bearing roller 20 is engaged with the end regions 25 and 26 and the central region 27, and the lever 23 is supported so as to be able to translate.

  The bearing roller 20 ′ is rotatably supported on a shaft pin provided with a bearing projection, as in the embodiment of FIGS. The axis of these shaft pins extends eccentrically with respect to the longitudinal axis of the bearing projection.

  The bearing projection is supported in a bearing recess formed in the stationary movement plate 28 so that the rotation can be adjusted when a certain frictional resistance is exceeded.

  When mounting the illustrated embodiment, as in the embodiment of FIGS. 1 to 4, the bearing roller 20 ′ is separated from the edge 14 ′ by rotating the bearing protrusion first, and the lever 23 is moved to the movement plate. Place on 28. The bearing roller 20 ′ is then moved toward the lever 23 by rotating the bearing protrusion until only minimal play remains between the bearing roller notch and the edge 14. As a result, the lever 23 is supported on the movement plate 28 in a state where it can move in translation and has play.

1 Toothed ring 2 Internal tooth 3 Flange part 4 Long hole 5 Time display panel 6 Through hole 7 Bush 8 Flange 9 Screw
10 Screw head
11 o'clock plate
12 Annular gap
13 Annular flange
14 edge
14 'edge
15 Bearing recess
16 Bearing protrusion
17 Longitudinal axis
18 axis pin
19 axis
20 Bearing roller
20 'bearing roller
21 Notch
22 recess
23 Lever
24 Arc path
25 Edge area
26 Edge area
27 Central area
28 Movement plate

Claims (14)

On the fixed part a bearings of rotating or translatable moving parts in the timepiece having a movement,
The movable part has one or more edges ( 14 ' ) extending along the movement path and having a constant cross section, the edges ( 14' ) being spaced apart from each other and having a circumference. a plurality of bearing rollers provided notch-outs extending in the direction (20 ') engages,
Extends to be perpendicular to the moving path of the moving parts, the axis of the bearing rollers (20 ') is freely supported rotating around,
Bearing in the axial receiving ingress portion of the fixed part of the timepiece are rotated adjustably supported while receiving the frictional resistance, characterized in that it comprises a shaft受突electromotive Metropolitan extending eccentrically axially against said axis . On the fixed part a bearings of rotating or translatable moving parts in the timepiece having a movement,
The stationary part has one or more edges ( 14 ) extending along a moving path of the movable part and having a constant cross section, the edges ( 14 ) being spaced apart from each other; and A plurality of bearing rollers ( 20 ) provided with notches (21) extending in the circumferential direction are engaged,
An axis (19) extending so as to be orthogonal to the moving path of the movable part and around which the bearing roller ( 20 ) is rotatably supported;
A bearing protrusion (16) that is supported so as to be rotationally adjustable while receiving frictional resistance and extends eccentrically with respect to the axis (19) in a bearing recess (15) of the movable part of the timepiece. A bearing characterized by comprising.   The bearing according to claim 1 or 2, wherein the notch (21) of the bearing roller (20, 20 ') has a V-shaped cross section.   The bearing according to claim 3 when dependent on claim 2, wherein the fixed part has a circular edge (14) extending in the circumferential direction, and the bearing roller (20) at the edge (14). Bearings characterized in that the notches (21) of the are engaged.   4. A bearing according to claim 3 when dependent on claim 1, wherein the translatable movable part is a longitudinally extending lever (23), two edges (14 ') on the lever (23). ) And a notch of the bearing roller (20 ′) is engaged with the bearing. A bearing according to any one of claims 1 to 5, wherein the edge extends along the movement path (14, 14 ') is characterized Rukoto to have a V-shaped cross-section bearing.   The bearing according to any one of claims 1, 3, 4, and 6, wherein the movable parts have surfaces parallel to each other.   8. The bearing according to claim 7, wherein the fixed part is a movement plate (11) in the timepiece and extends in parallel with a distance from a plane-parallel surface of the movable part. A bearing characterized by that.   It is a bearing as described in any one of Claims 1-8, Comprising: The said bearing protrusion (16) has a rotation recessed part for engaging a tool and rotating the said bearing protrusion (16). Bearing.   The bearing according to any one of claims 1, 3, 4, and 6-9, wherein the rotatable movable part is a toothed ring (1), and the toothed ring (1) A bearing which is rotatably supported by the bearing roller (20) at the edge (14) of the fixed part extending in the circumferential direction.   11. Bearing according to claim 10, characterized in that the toothed ring (1) is concentrically connected to the dial in the digital display part of the timepiece. The bearing according to claim 11, wherein the toothed ring ( 1 ) is coupled to the dial by a screw.   13. The bearing according to claim 12, wherein the toothed ring (1) and the dial are arranged in parallel with a distance from each other, and the bearing roller (20) and a fixed part are the toothed. A bearing, characterized in that it is arranged at a distance between the ring (1) and the dial.   The bearing according to any one of claims 11 to 13, wherein the dial is a time display board (5) of the timepiece.