JPS62186803A - Link arm band - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a linked armband, in particular for a wristwatch, having links hinged to each other, each link facing an adjacent link and adjacent to one side. It has a guide recess that opens toward the link.
The protruding guide attachment portion of the link that enters the guide recess and comes into contact with the both side walls of the guide recess in the band longitudinal direction is almost perpendicular to the band longitudinal direction between the both side walls of the guide recess. It relates to a device of the type that is pivotably guided around a pivot axis extending in the direction of.

BACKGROUND OF THE INVENTION It is known in link armbands of the above type that the links can be pivoted in an I contacting direction with their opposite end faces. Bending loads and leverage create high friction at the parts where the links meet each other. This attrition results in high wear in any case, depending on the link material. This wear is particularly large for link arm pans P made of titanium, for example.
This is because titanium-to-titanium friction is particularly large.

A further disadvantage of the known link arm band is that the body hair of the user of the link arm band may become trapped between the links that are in contact with each other, causing discomfort and pain to the user.

Problem to be Solved by the Invention It is an object of the invention to provide a link arm band of the type 1 in series d, in which the wear of the links is kept low.

Means for Solving the Problem The means of the present invention for solving the above-mentioned problem is to provide a link arm band of the type described at the beginning of 9, in which each of the links is connected between end faces of adjacent links facing each other in the longitudinal direction of the band. A play is provided to avoid contact between the end faces at the pivot position.

Effects of the Invention By configuring the link arm band according to the invention, the mutually facing end faces of the links do not come into contact and do not wear out, so that a very high service life of these parts is achieved.

At the same time, however, good guidance of the guide extension in the guide recess is obtained, which largely avoids twisting of the link arm band. Wear on the feed of the guide extension and the guide recess is minimal, since the friction occurring between these parts is sufficiently strong.

Actual) 1 (i) 2! 11 guide recess 2 and guide addition part 111 each! Particularly good guidance and torsion Nd are achieved because the I-walls extend on both sides of the pivot axis in the longitudinal direction of the band.

If the side walls of the guide extension extend parallel to each other in the longitudinal direction of the band, the resulting frictional load ra,% is small.

The same applies if the pivot axis has a circular compensation section.

The pivot can be placed in an axle hole passing through the link over the entire width of the band.

In a further embodiment, the pivot axis consists of a minor axis, the minor axis extending in the longitudinal direction of the band in a direction approximately perpendicular to the longitudinal direction of the band in a lateral guiding surface of the guide extension or guide recess. It projects into a corresponding recess formed in the guide recess or in the lateral guide surface of the guide extension.

In order to achieve simple assembly and disassembly, the short shaft can be axially protruded against a spring force into a shaft hole opened in the guide recess or in the 111II wall of the guide extension.
It is advantageous if the The shaft hole passes through the guide attachment part in a direction perpendicular to the longitudinal direction of the band and rests on the through hole, and the short shaft protrudes from each opening of the shaft hole, and the short I
A compression spring force of 1 is placed between the

In another embodiment, the shaft hole is a blind hole, and a compression spring is supported at the bottom of the shaft hole, and the short shaft is configured to be spring-loaded by the compression spring at the portion where the short shaft protrudes into the shaft hole.

The compression spring can be fixed in the shaft hole so that it will not be lost during assembly or disassembly, and this is particularly simple. This is done by having a large outer diameter and being held in a force-conducting manner in the shaft bore.

A compression spring can be fixed to the short shaft to prevent loss of the short shaft. For this purpose, a compression spring ring in contact with the short shaft can surround a coaxially projecting retaining projection of the short shaft. In this case, the retaining protrusion has a ring groove M, and the l1lII contacting the short axis of the compression spring
i! It is particularly reliable if the ring can be locked in the ring groove.

Without the aid of special tools, the short axis arranged in the guide extension has a ramp-like slope in which the opening of the guide recess, directed in the band longitudinal direction, enlarges the guide recess. provides easy assembly possibilities. This slope causes the short shaft to slide into the shaft hole against the spring force when the guide extension is inserted into the guide recess.

A similar effect can be achieved with a short axis arranged in the side wall of the guide recess, in which the transition part of the side wall of the guide addition to the pain surface of the guide addition has a ramp-like slope. Ru.

Another way to obtain a similar effect is that the short shaft is guided in a relatively non-rotatable manner in the shaft bore, and the i? The end protruding from the hole II has a ramp-like slope portion facing the link 14 in contact with the end portion.

Particularly good guidance of the links, and thus the avoidance of twisting in the Links Corpse Band, is achieved if the links are provided with a cover plate projecting in the longitudinal direction of the band on the upper side opposite to the arm side of the wearer, the cover plate being approximately This is achieved by the band extending in the longitudinal direction and contacting the upper surface of the adjacent link with a guide surface. Due to the large guide surface obtained here, wear is kept to a very low level. A similar advantage is that the link is provided with a cover plate on its upper surface opposite to the wearer's arm which at least partially covers the guide recess, the cover plate adjoining the guide surface extending generally in the longitudinal direction of the band. This is also achieved when the link is in contact with the upper surface of the guide appendage. If the guide surface is an arcuate surface, and the arcuate surface starts from the top surface of the link and extends toward the end of the link, the guide with a slight play will be stiff and the arcuate surface will rotate +111 If it has a curvature with a center that almost coincides with that of a plum, it is good.

In order to give a friction-free weight limit to the rotation of the link, the arcuate surface should be transformed into a stopper surface that is almost in the contact direction.
The stop surface extends to the end of the link.

A cover plate that limits the turning ability comes into contact with this stopper surface. This restriction of the pivotability of the links makes it possible to design the play between the end faces of the links to be very small, which also results in the avoidance of contact between the end faces of the links.

In another embodiment, in order to limit the pivotability of the link at the end face of the link facing in the band longitudinal direction, one or more guide pins protrude in the band longitudinal direction at the same end face of the link in the band longitudinal direction. , the guide pin may protrude with play into a corresponding notch formed in a corresponding end face of an adjacent link.

In this case, it is advantageous if the recess is designed with an approximately conical cross section that widens towards the end face.

In this case, the degree to which the guide pin can pivot within the notch also determines the degree of pivotability of the link.

Simple manufacturability is achieved by the link and the cover plate being one piece; it is advantageous if the link and the cover plate are cast parts.

In order for the pivot shaft or the short shaft to slide in the shaft hole for disassembly, the link must be inserted starting from the notch into the @ line of the pivot shaft within the range of entry of the short shaft into the notch. It may have a link release opening extending outwardly in a direction perpendicular to .

For this purpose, a link release projection for sliding the pivot shaft or a short 11i10t-slide can be inserted into the link release opening.

A simply constructed and easy-to-handle link removal tool for link armbands of the type described above is provided in which the link removal projection has a width approximately equal to the length of entry into the corresponding notch of the swivel Ig axis or minor axis. , and one free end has a ramp-like cap. When the link release projection is inserted into the link release opening, the pivot shaft or short shaft is moved in the shaft hole by means of a ramp-like ramp, so that the links can be pulled apart from each other.

two generally parallel link release lugs are joined to each other at ends opposite the ramp and are spaced apart from each other equal to the width of the link release lugs or guide appendages;
and it is particularly advantageous if the ramp-like ramp slopes in a direction opposite to the unlinking movement of the pivot axis or the short axis;
and can be easily handled.

Fu example Plate-shaped link 1.1' shown in the drawing.

1", 1'" is the link of that xb 1.1', 1", 1'
The link 1 adjacent to the end face 2 or 2' which is the same as ``,
l'.

It has a central guide recess 3 that opens toward the adjacent links 1", 1", 1", 1",
The guide addition part 4 is configured as a pair of guide recesses 3.
It is loaded inside.

The 1t-11J wall 5 of the guide recess 3 and the side wall 5a of the guide addition part 4 extend parallel to each other in the band longitudinal direction (direction indicated by arrow 6). There is a relatively large play γ between the end faces 2 and 2', and the play between the side wall 5a of the guide recess 3 and the side wall 5 of the guide addition part 4 is exactly the same as that of the guide addition part 4. It is large enough to allow easy passage within concavity P)r3 and to turn around 'IqfJ'.

This pivot axis extends within the guide recess 3 and the guide extension 4 in a direction approximately perpendicular to the longitudinal direction of the band (indicated by arrow 6).

The shaft hole 9.9' of the guide recess 4, the short eaa constituting the rotating shaft 11 arranged in 'f' is the shaft hole! '! + 9' +
Projecting from W', it projects into a corresponding recess 10 formed in the side wall 5 of the guide recess 3 and extending in a direction perpendicular to the longitudinal direction of the band.

These cutouts are open on the underside of the link IN band facing the wearer's yoke (not shown) and are partially supported on the opposite top side.

As shown in Figures 1 to 3, the shaft holes 9 and 5' are blind holes;
A compression spring 11 is supported at the bottom. compression spring 11
spring-loads the short shaft 8 in the area where it protrudes into the shaft bore 9 or 9'.

In FIG. 4, the shaft hole 9" is a penetrating notch, and the shaft hole 9"
Only one compression spring 11' is arranged therein, which contacts with its end the end face of the short shaft 8 at its end which extends into the shaft hole q'.

As can be clearly seen from FIGS. 6 and 7, the shaft hole 9'' is open at the top surface of the link 1'', so this link 1''
can be manufactured as a casting.

The short shaft 8' shown in FIG.
It has 2t-.

Within this ring groove 13 is a compression spring 11 shown in FIG.
A wire ring 14 that can be contacted with the short axis d' of the shaft can be locked.

The wire ring 14 has an inner diameter that is gradually smaller than the outer diameter of the holding projection 12. The outer diameter of the coil 15 at the other end t7ch of the compression spring 11' is slightly larger than the inner diameter of the shaft hole 9 or 9'. As a result, the compression spring 11' inserted into the shaft hole 9 or 9' is held by the wire ring 15 in a force-transmitting manner 9% of the way, and within the shaft hole 9'.

In the link 1'' shown in Figure 2i186, the guide recess 3
It has a ramp-like slope 16 which enlarges the opening in the band longitudinal direction (indicated by arrow 6). The short shaft 8 is pushed into the shaft hole 9 or T by the inclined part 16 until the correct insertion depth is reached when the guide extension part 4 is inserted into the guide recess 3 and the short shaft 8 is locked in the notch. pushed into.

In the embodiment shown in FIG. 1, the short shaft 18d and the shaft hole 9 face toward the outside of the short shaft 8, and the 'fc end surface 1t constitutes a slope similar to a jet slope, which is the same as the guide recess 3. When inserting the guide addition part 4 into the guide recess 3,
It enters into the JB/11 shaft hole 9.

The embodiments shown in FIGS. 1, 2, and 4 to 7 have a guide attachment section on the upper surface on the side of the guide attachment section 4, and a cover that protrudes in the longitudinal direction of the band (indicated by arrow 6). It has a plate 18.

On the other side, the cover plate 18 partially covers the guide recess 3. This cover plate 18 is connected to the link 1,
By turning 1' or 1'', the stop surface 19.2
Touch 0. The stop surface 19.20 is a tangential extension of an arcuate surface (not shown), which is the link 1.1.
' or 1'' starting from the upper surface and having a curvature centered on the pivot axis.

In the link 1'' shown in Figures 6 and 7, the shaft hole !g''
is partially covered by a cover plate 18.

In Fig. 3, link 1" does not have a cover plate. The turning possibility of link 1" is ih! In order to limit J,
The link has a guide pin 21 projecting in the longitudinal direction of the band, indicated by arrow 6, on the end face 2' facing towards the longitudinal direction of the band, indicated by arrow 6, and p! :J, the guide pin 21 is connected to the correspondingly facing end surface 2' of the adjacent link 1''
It protrudes into the notch 22 provided in the. Notch 22
is almost round-shaped, and fR expands toward the end surface.
It is configured to have a supporting aspect. This inner shoe then defines the extent to which the link 1'' can be pivoted.

In FIG. 10, a link removal tool 23 is shown. The delinking tool is made from a plate 24, the width of which is equal to or smaller than the diameter of the minor axis 8 or 8'.

The plate 24 has two parallel delinking projections 25 which are arranged with an internal spacing between them equal to the width of the guide extension 4. The width of the link removal protrusion 5 is such that the short axis 8 or 8' is the shaft hole M,
9' or γ'. The link removal protrusion 25 is attached to the free steel part 1, and the oblique part 2
With o and b, the oblique portion is inclined 1qA in the direction opposite to the unlinking movement of the minor axis 111 or d'.

Link removal protrusion 25 All links 1.1', 1'', or 1
111118 or 8' is pushed into the shaft hole 9, 9' or gu' by the inclined part 26 by inserting it into the notch 10 opened on the lower surface side of the milled rice 2.
The two links 1, 1', 1'' or 1'' can all be separated from each other.

[Brief explanation of drawings]

1 is a partial cross-sectional view of two links of a linked arm band; FIG. 2 is a partial cross-sectional view of two links of another embodiment of a linked arm band; FIG. FIG. 6 is a partially cross-sectional view of two links of the sixth embodiment of the link arm band, and FIG. 4 is a partially cross-sectional view of two links of the fourth embodiment of the link arm band. Figure 5
The figure is a side view of the link shown in Fig. 2, Fig. 6 is a view showing the link of the link arm band, Fig. 7 is a side view of the link shown in Fig. 6, and Fig. 8 is a short axis. FIG. 9 is a diagram showing a compression spring, and FIG. 10 is a diagram showing a link removal tool. t, i', i", 1'"...link, 2, 2'...end face, 3...-guide recess, 4...guide addition part, 5,
5a...91! I wall, 6...arrow, 1...play, 8
．． 8"・°short axis, 9, 9', 9"...shaft hole, 10
．． 22...notch, 11, 11'...compression gun,
12... Holding protrusion, 13... Ring groove, 14.15
... wire ring, 16 ... inclined part, 17 ... end surface, 18
...Cover play 1s19,20...Stopper side, 2
1. Guide gin, 23. Link removal tool, 24.
... Plate, 25... Link removal protrusion, 26... Inclined part. 2.2'...Finally Fig, 4 1"...Link Fig, 5 1"...Link

Claims (1)

[Claims] 1. A link arm band having links that are hinged to each other, each link having a guide recess that is open toward the adjacent link on one side facing the adjacent link. , the protruding guide attachment portions of adjacent links that protrude into the guide recess and come into contact with both side walls of the guide recess extending in the band longitudinal direction are approximately perpendicular to the band longitudinal direction between the both side walls of the guide recess. In the case of a type in which adjacent links (1 or 1' or 1'' or 1'
″) facing each other in the band longitudinal direction (6) (2,
2') is characterized in that a play is provided between the end faces (2, 2') to avoid contact with each other at each pivot position of the link (1 or 1' or 1'' or 1''); Link arm band. 2. Link arm band according to claim 1, characterized in that the side walls of the guide recess (3) and the guide extension (4) extend on both sides of the pivot axis when viewed in the longitudinal direction (6) of the band. 3. The side wall (5) of the guide addition part (3) extends parallel to each other in the band longitudinal direction (6).
Link arm band according to item 1 or 2. 4. Link arm band according to any one of claims 1 to 3, wherein the pivot axis has a circular cross section. 5. The link arm band according to any one of claims 1 to 4, wherein the pivot shaft is disposed in a shaft hole passing through the link over the entire width of the band. 6. At the side wall (5 or 5a) of the guide extension (4) or guide recess (3), the pivot axis consists of a short axis (8, 8'), the short axis extending in the longitudinal direction of the band. The guide recess (3) protrudes in a direction substantially perpendicular to the longitudinal direction.
or the side wall (5a or 5) of the guide attachment part (5)
projecting into a suitable cutout (10) formed in the
A link arm band according to any one of claims 1 to 4. 7. The short shaft (8) has a shaft hole (
9 or 9′ or 9″) in the axial direction against a spring force.
Link arm band as described in section. 8. The shaft hole (9'') is a through hole that extends through the guide attachment part (4) in a direction perpendicular to the band longitudinal direction (6), and the short axis (8) is a through hole that extends through the shaft hole (9''). ), and a compression spring (11) is disposed between the short shafts (8), and any one of claims 1 to 4, and 6 and 7. or link arm band as described in one section. 9. The shaft hole (9 or 9') is a blind hole, and a compression spring (11) is supported at the bottom of the blind hole, and the short shaft (8) is moved into the shaft hole (9 or 9') by the compression spring. Any one of claims 1 to 4, 6, and 7, which is configured to be spring-loadable at the portion that protrudes into the circle.
Link arm band mentioned in the section. 10. The link arm band according to any one of claims 1 to 9, wherein the compression spring is fixed in the shaft hole. 11. The link arm band according to claim 10, wherein the compression spring (8') has an outer diameter larger than the inner diameter of the shaft hole at the portion opposite to the short axis side. 12. Link arm band according to any one of claims 1 to 11, in which the compression spring is fixable to the short axis. 13. The coil (1) of the compression spring (11') in contact with the short shaft
4) is a coaxially projecting retaining projection (12) of the short axis (8').
13. A linked arm band according to claim 12, which surrounds a.). 14. The retaining protrusion (12) has a ring groove (13), and the coil ring (1) in contact with the short axis of the compression spring (11')
14. Link arm band according to claim 13, characterized in that 4) is lockable in the ring groove (13). 15. Claims 1 to 14, in which the opening of the guide recess (3) facing in the band longitudinal direction (6) has a ramp-like slope that enlarges the guide recess. A link arm band as described in any one of the following items. 16. Any one of claims 1 to 14, wherein the transition portion of the side wall of the guide addition portion to the end face of the guide addition portion has a ramp-like slope portion. - Link arm band. 17. The short shaft is guided in the shaft hole in a relatively unrotatable manner,
The link arm band according to any one of claims 1 to 16, wherein the link arm band has a ramp-like slope portion facing the link adjacent to the end portion protruding from the shaft hole. . 18. The links (1, 1', 1''') are provided with a cover plate (18) protruding in the band longitudinal direction (6) on the upper surface on the opposite side from the wearer's arm side, and the cover plate almost covers the band. Any one of claims 1 to 17, wherein the guide surface extending in the longitudinal direction (6) is capable of contacting the upper surface of the adjacent link (1, 1', 1'''). Link arm band listed. 19. The links (1, 1', 1''') are provided with a cover plate (18) on the upper surface opposite to the arm side of the wearer, which at least partially covers the guide recess (3), and the cover plate The guide surface (4) of the adjacent links (1, 1', 1''') extends approximately in the band longitudinal direction (6).
19. A link armband according to any one of claims 1 to 18, which is capable of contacting the upper surface of the wristband. 20, the guide surface is a circular arc surface, and the circular arc surface is a link (1
, 1', 1''')
, 1''') according to claim 18 or 19.21. 22. The link arm band according to claim 20, wherein the arc surface transitions to a substantially tangential stop surface (19 or 20), and the stop surface is connected to the link (1, 1'). , 1'''). 23, one or more guide pins (21) link (
The guide pin protrudes in the band longitudinal direction (6) at the end face (2 or 2') facing the band longitudinal direction (6) of the adjacent link (1"). or 2), projecting with play into a corresponding notch (22) formed in the link arm band according to any one of claims 1 to 22. 24. Link arm band according to claim 23, characterized in that the recess (22) is of substantially conical design with a cross section that widens towards the end face (2 or 2'). 25. The link arm band according to claim 18 or 19, wherein the link and the cover plate are integrated. 26. A link arm band according to any one of claims 1 to 25, wherein the link and cover plate are cast products. 27. The link has, in the region of entry of the minor shaft into the recess, a link release opening starting from the recess and extending outward in a direction perpendicular to the axis of the pivot shaft. Link arm band according to any one of paragraphs 1 to 27. 28. The link removal protrusion (25) has a width approximately equal to the length of the short shaft (8) into the corresponding notch (10), and has a ramp-like slope at one free end. (26) A link wrist band according to any one of claims 1 to 27. 29. Two substantially parallel link release projections (25) are joined to each other at the ends opposite to the ramp (26), the link release projections (25) being equal to the width of the guide appendage (4); 29. Disposed at a distance from each other and in which the ramp-like ramps (26) are inclined in a direction opposite to the unlinking movement of the minor axis (8). Link arm band.