HK1110956B - Pointer indication type timepiece - Google Patents

Description

Pointer display type clock

Technical Field

The present invention relates to a pointer display timepiece, and more particularly, to a pointer display timepiece in which a dial washer (dial washer) is prevented from coming off a shaft portion by providing a stopper member that prevents the dial washer from moving in an axial direction on a part of the shaft portion of an hour wheel (hour wheel).

Background

In recent years, a hand display type wristwatch can be manufactured by automatically assembling by an assembling machine. In addition, the automatic assembly reduces the manufacturing cost of the timepiece movement, and therefore, it is prevalent in the timepiece industry to sell only the timepiece movement. Fig. 9 shows a part of the timepiece movement, but there are, for example, timepiece movements shown in fig. 1 and 3 of patent document 1.

(first Prior Art example)

Fig. 9 is a schematic cross-sectional view for explaining a main part of a timepiece movement according to a first conventional example.

In the figure, the timepiece movement 100 is configured to include a resin hour wheel 110 in which a gear portion 111 and a shaft portion 112 are integrally molded, and a dial washer 120; when the dial washer 120 is inserted into the shaft 112 and the dial (dial)130 is further mounted, the gear portion 111 of the hour wheel 110 acts on the bottom plate (main plate)140 side, thereby preventing the shaft 112 from tilting (see, for example, patent document 1).

In the timepiece movement 100, although not shown, the hour hand is attached to the shaft 112 of the hour wheel 110, the minute hand is attached to the center wheel 160, and the second hand is attached to the fourth wheel 150.

Fig. 10 is a schematic view for explaining a dial washer of a timepiece movement according to a first conventional example, where (a) is a plan view and (b) is an X-X sectional view.

In this figure, the dial washer 120 is formed by bending an annular flat plate made of an elastic body such as metal with an arbitrary diameter linear portion 121 as a bottom portion. When the circular hole 123 is inserted into the shaft portion 112, the bottom portion of the dial washer 120 contacts the gear portion 111, and the outer peripheral edge portion 122 located at the uppermost position contacts the dial plate 130. Then, the restoring force of the outer peripheral edge portion 122 pressed by the code plate 130 acts on the gear portion 111 on the bottom plate 140 side.

Fig. 11 is a schematic cross-sectional view for explaining a state in which a dial washer is inserted into a shaft in the timepiece movement according to the first conventional example.

In this figure, the dial washer 120 is inserted into the shaft portion 112. Here, since the inside diameter D of the circular hole 123 of the dial washer 120 is larger than the outside diameter D of the shaft portion 112 and the dial washer 120 is smoothly inserted into the shaft portion 112, a defect such as scratches on the outer peripheral surface of the shaft portion 112 does not occur, but the dial washer is likely to come off.

When the timepiece movement 100 is assembled as shown in fig. 9, the gear portion 111 is pressed against the bottom plate 140 by the restoring force of the dial washer 120, and the shaft portion 112 can be prevented from tilting, so that the hour hand (not shown) attached to the tip of the shaft portion 112 can be prevented from contacting the dial plate or minute hand due to tilting (tilting), and the timepiece can be made thin.

However, when the timepiece movement is simply sold or transported, if the parts of the timepiece movement come off, the subsequent work is unnecessarily troublesome. Therefore, an additional method is adopted in which the hour wheel and the dial washer are individually packed without being packed in the timepiece movement, but the packing is required at the time of boxing (packing), and thus the production efficiency is deteriorated. In addition, when the movement of the timepiece is transported in the timepiece assembling process, it is necessary to prevent the hour wheel or the dial washer from coming off.

Therefore, although a method of removing the hour wheel and the dial washer from the timepiece movement, individually packaging them, and attaching them to the timepiece movement for transportation is adopted, if this method is adopted, it is necessary to separately transport the parts that can be automatically assembled, and therefore, the production efficiency is deteriorated. Therefore, various techniques have been developed to prevent the hour wheel, the dial washer, and the like from coming off, and for example, there are cases shown in fig. 12.

(second Prior Art example)

Fig. 12 is a schematic diagram for explaining the essential parts of the movement of the timepiece according to the second conventional example, in which (a) is a plan view and (b) is a side view.

In the figure, the timepiece movement 200 is configured to include a resin hour wheel 210 in which a wheel shaft portion 212 is projected, and a dial washer 220 having a projection portion 222 which is engaged (grip) and fixes the wheel shaft portion 212 and is provided on an inner peripheral portion of a center hole 221 (see, for example, patent document 2). With such a configuration, the dial washer 220 can be prevented from coming off the hub portion 212 in the conveyance step or the assembly step. The dial washer 220 can prevent a pointer (not shown) attached to the tip of the hour wheel 210 from tilting, and can reduce the thickness of the timepiece.

Patent document 1: japanese patent laid-open publication No. 2001-74857

Patent document 2: japanese laid-open patent publication No. 2002-207086

Disclosure of Invention

However, the timepiece movement 200 according to the second conventional example has a problem that the protrusion 222 of the dial washer 220 is rubbed against the outer peripheral surface of the hub portion 212 and lowered when the dial washer 220 is attached, and therefore scratches are generated on the surface of the hub portion 212. That is, if a scratch is generated, there is a possibility that burrs or chips are generated, and if such an inclusion exists inside the timepiece, it is a very significant problem from the viewpoint of quality control. That is, even a small amount of inclusions causes the timepiece to stop, and therefore it is necessary to prevent the occurrence of inclusions.

Further, for example, if the dial washer 220 of the second conventional example is inserted into the shaft portion 112 of the hour wheel 110 of the first conventional example to which the hour hand is attached, there is a problem that the fixing force of the hour hand is lowered due to the scratch mark formed at the tip end portion of the shaft portion 112 to which the hour hand (not shown) is attached.

Further, in general, it is extremely difficult to form the minute protrusion 222 on the dial washer 220 made of a thin metal plate, and there is a problem that the required accuracy of the protrusion 222 cannot be maintained.

Further, when the dial washer 120 is mounted in a tightly fitted state by making the inner diameter D of the circular hole 123 smaller than the outer diameter D of the shaft portion 112, there is a problem that warping (bending state) of the dial washer 120 is hindered, the elastic force (restoring force) of the dial washer 120 is unstable (varies), and axial movement of the hour wheel 110 cannot be stably suppressed, and deviation of hands (deflection of hands) cannot be reduced.

The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a pointer display type timepiece in which a dial washer is prevented from falling off before a dial plate is attached, in which the occurrence of foreign matter is suppressed, in which a pointer can be reliably fixed, and in which the occurrence of a problem that the elastic force of the dial washer is unstable and the pointer is not shifted can be reduced.

In order to achieve the above object, a pointer display timepiece according to the present invention includes an hour wheel having a shaft portion and a gear portion for mounting a pointer, and a dial washer having a hole portion through which the shaft portion of the hour wheel is inserted, and is configured such that a stopper member for preventing the dial washer from coming off the hour wheel by preventing the dial washer from moving in an axial direction is provided at a part of the hour wheel.

With this configuration, the movement of the dial washer in the axial direction is prevented by the stopper member, and therefore the dial washer can be prevented from coming off the hour wheel.

The dial washer is a spring washer used in a wristwatch that is inserted into the shaft portion and further mounted with a dial plate so that the gear portion of the hour wheel acts on the bottom plate side to prevent the shaft portion from tilting.

In the present invention, the stopper member is one or more protrusions protruding in the outer circumferential direction from the shaft portion.

With this configuration, the dial washer can be effectively prevented by using the projecting portion.

In the present invention, the protruding portion is provided from the gear portion surface of the hour wheel to a position above the axial direction of the shaft portion by a height 2 to 6 times the thickness of the dial washer; further, the projection is engaged with a hole portion of the dial washer (engage).

With this configuration, the dial washer can be prevented from coming off simply by the simple configuration in which the projecting portion is engaged with the hole portion of the dial washer.

In the present invention, the protruding portion is provided below a pointer attachment position of the shaft portion.

With this configuration, the convex portion does not hinder the attachment of the pointer when the pointer is attached, and the occurrence of a defect that the pointer rubs against the stopper member to generate an inclusion can be prevented.

In the present invention, a tapered portion (tapered part) is formed above the convex portion.

With this configuration, the dial washer can be smoothly fitted.

In the present invention, the dial washer has a hole portion whose inner diameter is larger than the outer shape of the pointer attachment portion of the shaft portion and smaller than the diameter of the imaginary circle of the convex portion.

With this configuration, the dial washer can be easily attached to the hour wheel, and the dial washer can be reliably fixed by the stopper member.

In the present invention, the convex portions are provided in an odd number of three or more, and the convex portions are arranged at equal intervals.

In this way, if the stopper members are provided in an odd number of three or more and are arranged at equal intervals, the stopper members are not provided at positions 180 degrees relative to each other, and therefore, the dial washer can be easily fitted into the hour wheel. Further, since the dial washer is not prevented from warping, instability of the spring force of the dial washer can be reduced, axial movement of the hour wheel is suppressed, and hand misalignment can be reduced.

In the present invention, the convex portion is formed at a position on the upper surface of the gear portion away from the shaft portion.

With this configuration, since the dial washer is not prevented from warping, the instability of the spring force of the dial washer can be suppressed.

In the present invention, the dial washer is configured such that an inner diameter of a hole portion formed in the dial washer is larger than an outer shape of the shaft portion and smaller than a diameter of an imaginary circle of the projecting portion, and the dial washer is loosely fitted (idlyngage) over the projecting portion on the shaft portion between the projecting portion and the gear portion.

With this configuration, the dial washer is loosely fitted to the shaft portion, and the dial washer is not prevented from warping, so that the dial washer does not become unstable in spring force, and axial movement of the hour wheel can be reliably suppressed, thereby reducing hand misalignment.

In the present invention, the projection is provided with a first projection projecting from a surface of the shaft portion, and a second projection further projecting from a surface of the first projection.

With this configuration, when the dial washer is inserted into the shaft portion, the gap between the shaft portion not including the projecting portion and the hole portion of the dial washer can be increased, and therefore the dial washer can be smoothly inserted into the shaft portion.

In the present invention, the first projection and the second projection are provided downward with respect to the pointer attachment position of the shaft portion.

With this configuration, when the pointer is attached, the first protruding portion or the second protruding portion does not hinder the attachment of the pointer, and the occurrence of a defect that the pointer rubs against the stopper member to generate an inclusion can be prevented.

In the present invention, a tapered portion is formed at an upper portion of the first convex portion and/or the second convex portion.

With this configuration, the dial washer can be smoothly fitted.

In the present invention, a slope portion is provided below the second convex portion.

With this configuration, the formability of the forming die can be improved.

In the present invention, the dial washer has a hole portion whose inner diameter is larger than a diameter of an imaginary circle of the first convex portion and smaller than a diameter of an imaginary circle of the second convex portion.

With this configuration, the dial washer can be easily attached to the hour wheel, and the dial washer can be reliably fixed by the stopper member.

In the present invention, the first convex portion and the second convex portion are provided in an odd number of three or more, and the first convex portion and the second convex portion are arranged at equal intervals.

In this way, if the stopper members are provided in an odd number of three or more and the stopper members are arranged at equal intervals, the stopper members are not provided at positions 180 degrees relative to each other, and therefore, the dial washer can be easily fitted into the hour wheel. Further, since the dial washer is not prevented from warping, instability of the spring force of the dial washer is reduced, axial movement of the hour wheel is suppressed, and hand misalignment can be reduced.

In the present invention, the blocking member is a hook (hook) provided on an upper surface of the gear portion of the hour wheel, and a part of the dial washer is locked (locked) by the hook.

In this way, by using the hook as the stopper member, the dial washer can be easily attached to the hour wheel, and the dial washer can be reliably fixed by the stopper member.

In the present invention, the hook is provided at least two positions facing each other with the shaft portion interposed therebetween.

With this configuration, the dial washer can be fixed only by locking the hooks at least two positions facing each other across the shaft portion.

In the present invention, a part of the outer periphery of the dial washer is locked to the hook. With this configuration, the outer periphery of the dial washer can be easily locked.

In the present invention, the dial washer is configured to be bent with an arbitrary diameter line portion as a bottom portion, and the intersection position of the bottom portion and the outer periphery is locked by the hook.

In this way, when the dial washer is bent, the dial washer can be strongly fixed to the bottom of the curved surface while having a large elasticity. Further, since the dial washer is not prevented from warping, instability of the spring force of the dial washer is reduced, axial movement of the hour wheel is suppressed, and hand misalignment can be reduced.

In the present invention, the stopper member is an adhesive member provided on an upper surface of the gear portion of the hour wheel, and the dial washer is fixed to the adhesive member.

In this way, if the stopper member is an adhesive member, the stopper member can be fixed only by pressing the dial washer against the adhesive member attached to the hour wheel.

In the present invention, the adhesive members are provided at least two locations opposing each other with the shaft portion therebetween.

With this configuration, the dial washer can be fixed only by the adhesive force with the adhesive members at least two locations opposing each other across the shaft portion.

In the present invention, the dial washer is bent with an arbitrary diameter line portion as a bottom portion, and two portions of the bottom portion are in contact with the adhesive member.

In this way, when the dial washer is bent, the dial washer can be strongly fixed to the bottom of the curved surface while having a large elasticity. Further, since the dial washer is not prevented from warping, instability of the spring force of the dial washer is reduced, axial movement of the hour wheel is suppressed, and hand misalignment can be reduced.

In addition, the hour wheel of the present invention is made of resin, and with this configuration, the stopper member can be easily processed on the hour wheel.

In the present invention, the dial washer is formed of metal, and thus, when the dial washer is formed of metal, the dial washer can have sufficient elasticity. In addition, even if the environment such as temperature or humidity changes, the elasticity is not stable in some cases. For example, if the dial washer is made of resin, the elastic force may be reduced and the dial washer may not return to its original shape.

In order to achieve the above object, a pointer display timepiece according to the present invention includes an hour wheel having a shaft portion and a gear portion for mounting a pointer, and a dial washer having a hole portion through which the shaft portion of the hour wheel passes, wherein a stopper member including a protrusion for preventing the dial washer from coming off the hour wheel by preventing the dial washer from moving in an axial direction is provided at a part of the hour wheel; the convex part is provided with a first convex part protruding from the surface of the shaft part and a second convex part further protruding from the surface of the first convex part; the first convex portion is formed from a lower surface of the second convex portion to the gear portion surface.

With this configuration, the movement of the dial washer in the axial direction is blocked by the stopper member, and therefore the dial washer can be prevented from coming off the hour wheel. Further, when the dial washer is inserted into the shaft portion, the gap between the shaft portion not including the projection portion and the hole portion of the dial washer can be increased, and therefore the dial washer can be smoothly inserted into the shaft portion.

In the present invention, the dial washer has a hole portion whose inner diameter is larger than a diameter of an imaginary circle of the first convex portion and smaller than a diameter of an imaginary circle of the second convex portion.

With this configuration, the dial washer can be easily attached to the hour wheel, and the dial washer can be reliably fixed by the stopper member.

In the present invention, a tapered portion is formed at an upper portion of the first convex portion and/or the second convex portion, and a slope portion is provided at a lower portion of the second convex portion.

With this configuration, the dial washer can be smoothly inserted into the projecting portion, and the dial washer can be easily attached and detached. In addition, the formability with respect to the forming die can be improved.

The present invention provides a pointer display type timepiece in which a dial washer is prevented from falling off before a dial plate is attached, foreign matter is suppressed from being generated, a pointer can be reliably fixed without damaging a pointer attachment position, and further, the occurrence of a problem that the dial washer cannot reduce pointer deviation due to unstable elastic force can be prevented.

Drawings

Fig. 1 is a schematic view of essential parts of a hand display type timepiece according to a first embodiment of the present invention, in which (a) is a plan view and (b) is an a-a sectional view.

Fig. 2 is a schematic enlarged plan view for explaining a dial washer of a hand display timepiece according to a first embodiment of the present invention.

Fig. 3 is a schematic view of a main part of a pointer display type timepiece according to an application example of the first embodiment of the present invention, wherein (a) shows a plan view, and (B) shows a B-B sectional view.

Fig. 4 is a schematic view of essential parts of a hand display type timepiece according to a second embodiment of the present invention, in which (a) is a plan view and (b) is a C-C sectional view.

Fig. 5 is a schematic view of essential parts of a hand display type timepiece according to a third embodiment of the present invention, in which (a) is a plan view and (b) is a D-D sectional view.

Fig. 6 is a schematic view of essential parts of a hand display type timepiece according to a fourth embodiment of the present invention, in which (a) is a plan view and (b) is an E-E sectional view.

Fig. 7 is a schematic view of essential parts of a pointer display timepiece according to a fifth embodiment of the present invention, in which (a) is a plan view and (b) is an F-F sectional view.

Fig. 8 is a schematic enlarged plan view for explaining a relationship between a convex portion and a circular hole of a dial washer in a pointer display type timepiece according to a fifth embodiment of the present invention.

Fig. 9 is a schematic cross-sectional view for explaining a main part of a timepiece movement according to a first conventional example.

Fig. 10 is a schematic view for explaining a dial washer of a timepiece movement according to a first conventional example, where (a) is a plan view and (b) is an X-X sectional view.

Fig. 11 is a schematic cross-sectional view for explaining a state in which a dial washer is inserted into a shaft in the timepiece movement according to the first conventional example.

Fig. 12 is a schematic diagram for explaining main parts of a timepiece movement according to a second conventional example, where (a) is a plan view and (b) is a side view.

Description of the symbols

11. 11' projection 11a first projection

11b second projection 13, 13', 13a tapered surface

13b inclined surface portion 14 axial center

15. 15a, 15b imaginary circle 16 clasp

17 sticking part 100 clock movement

110 hour wheel 111 gear part

112. 112a shaft portion 113 root portion

Diameter line part of 120 dial washer 121

122 peripheral edge portion 123 round hole

130 character code board 140 bottom board

150 fourth wheel 160 centre wheel

200 timepiece movement 212 axle

210 hour wheel 220 dial washer

221 center hole 222 projection

Detailed Description

[ first embodiment ]

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a schematic view of essential parts of a hand display type timepiece according to a first embodiment of the present invention, in which (a) is a plan view and (b) is an a-a sectional view.

In the figure, the hand display timepiece of the present embodiment differs from the hand display timepiece of the first conventional example in that a convex portion 11 serving as a stopper member is provided on a part of the hour wheel 110 (in the present embodiment, a root portion 113 of the shaft portion 112). Other constituent elements are basically the same as those of the first conventional example.

Therefore, in fig. 1, the same components as those in fig. 9, 10, and 11 are denoted by the same reference numerals, and detailed description thereof is omitted.

The projection 11 is formed in a substantially semicircular shape projecting from the shaft 112 in the outer circumferential direction and engages with the circular hole 123 of the dial washer 120. Here, "engagement" means that the dial washer 120 is fitted into the protruding portion 11 so as not to easily come off the shaft portion 112, and is usually fitted in a state of tight fitting (interference fit) or clearance fitting (lose fit). With such a configuration, the projecting portion 11 functions as a stopper member for preventing the movement in the axial direction, and the movement in the axial direction of the dial washer 120 can be prevented only by engaging with the circular hole 123 in the shape of the normal (conventional) dial washer 120, thereby preventing the dial washer 120 from coming off the hour wheel 110.

Here, it is preferable that the tapered surface 13 as a tapered portion is formed on the upper portion of the convex portion 11, and the dial washer 120 can be smoothly fitted. Further, by smoothly fitting the dial washer 120, generation of foreign matter such as burrs or chips can be suppressed.

Further, the hour wheel 110 is made of resin, and with such a configuration, even the hour wheel 110 having the convex portion 11 can be processed with high accuracy and ease.

The convex portion 11 of the present embodiment is formed in a half-split cylindrical shape, but is not limited to this shape. The height of the projecting portion 11 may be a height necessary for engagement with the dial washer 120, for example, a height several times (2 to 6 times) the thickness of the dial washer 120, and the projecting portion may be formed to have a height not less than a necessary height, thereby suppressing the generation of foreign matter.

Since the projecting portion 11 is provided below the pointer attachment position of the shaft portion 112 (normally, the distal end portion of the shaft portion 112), that is, at a position not interfering with the pointer (not shown), it is possible to prevent the occurrence of a problem that the pointer rubs against the projecting portion 11 to generate an inclusion when the pointer is attached. Further, in the present embodiment, the projecting portion 11 is provided at a height of 2 to 6 times the thickness of the dial washer 120 from the face of the gear portion 111 of the hour wheel 110 to the axial upper side of the shaft portion 112, and the dial washer 120 can be fixed to the base portion 113 of the shaft portion 112 of the hour wheel 110 where the dial washer 120 is normally located.

Further, since the convex portion 11 is provided on the side of the gear portion 111 with respect to the axial center 14 of the shaft portion 112, when the hour hand (not shown) is incorporated into the hour wheel 110, the convex portion 11 does not become an obstacle to the attachment of the hour hand, and the hour hand can be reliably and easily attached to the hour wheel.

Three projections 11 are arranged at equal intervals in the circumferential direction of the shaft portion 112. In this way, if the protruding portions 11 are provided in an odd number of three or more and arranged at equal intervals, the protruding portions 11 are not provided at positions 180 degrees relative to each other, and therefore, two points D where the circular hole 123 and the diametrical line portion 121 intersect each other₁、D₂And will not engage with the projections 11 at the same time. For example, although not shown, two points D₁、D₂When the dial washer 120 is engaged with the projecting portion 11, the dial washer 120 is stretched in the direction of the diametrical line portion 121, and the warping (bending state) of the dial washer 120 is inhibited, and the axial movement of the hour wheel 110 cannot be stably suppressed, and the hand misalignment cannot be reduced. That is, in the present embodiment, by disposing three protrusions 11 at equal intervals in the circumferential direction of the shaft portion 112, it is possible to reduce the instability of the spring force of the dial washer 120 while maintaining the warpage of the dial washer substantially normally, and to reduce the hand shift by suppressing the axial movement of the hour wheel 110. In addition, two points D are provided when the dial washer 120 is fitted₁、D₂Since the dial washer 120 does not simultaneously engage with the projections 11, it is possible to easily mount the dial washer 120 on the hour wheel 110 without being operated by paying attention to the positional relationship with the projections 11.

In the present embodiment, three convex portions 11 are provided, but three or more odd-numbered convex portions may be provided at equal intervals.

Fig. 2 is a schematic enlarged plan view illustrating a dial washer of a hand display timepiece according to a first embodiment of the present invention.

In this figure, the dial washer 120 is configured such that the inner diameter of the circular hole 123 is larger than the outer diameter of the shaft portion 112 and smaller than the diameter of the imaginary circle 15 passing through the position where the three protrusions 11 contact the circular hole 123. With this configuration, the dial washer 120 can be easily attached to the hour wheel 110, and the dial washer 120 can be reliably fixed by the projecting portion 11.

In the present embodiment, the pointer attachment portion is the tip portion of the shaft portion 112 having a substantially cylindrical shape, and therefore, the inner diameter of the circular hole 123 is made larger than the outer diameter of the shaft portion 112, but in the case where the pointer attachment portion has a non-cylindrical shape, for example, the inner diameter of the circular hole 123 may be made larger than the outer shape of the pointer attachment portion of the shaft portion 112.

Further, since the inside diameter of the circular hole 123 of the dial washer 120 is larger than the outside diameter of the shaft portion 112, the needle can be fixed with a standard fixing force without causing a trouble of scratching the needle attachment position of the shaft portion 112 at the time of insertion.

Further, since the center point (not shown) of the dial washer 120 engaged by the protrusions 11 coincides with the center point (not shown) of the hour wheel 110, the dial washer 120 slides in a state where the outer peripheral edge portion 122 and the dial plate 130 are stable without being eccentric or positionally displaced with respect to the shaft portion 112, and thus the risk of generating foreign matter such as abrasion powder can be reduced.

Here, the dial washer 120 is preferably made of metal, and thus the dial washer 120 can have sufficient elasticity. The metal dial washer 120 has an advantage that its elasticity is less unstable even when the environment such as temperature or humidity changes. Incidentally, if the dial washer 120 is made of resin, for example, the elastic force may be reduced and the dial washer may not return to its original shape.

In the pointer display type timepiece having the above configuration, the dial washer 120 can be prevented from falling off before the dial plate 130 is attached, the occurrence of foreign matter can be suppressed, the pointer can be reliably fixed without damaging the pointer attachment position, and the occurrence of a problem that the dial washer 120 cannot reduce the pointer shift due to unstable elastic force can be prevented.

In the above embodiment, the convex portions 11 as the stopper members are provided at three positions, but the present invention is not limited to this configuration. For example, as shown in fig. 3, one projection 11 may be provided. With this configuration, the protruding portion 11 and the shaft portion 112 on the opposite side of the protruding portion 11 engage with the circular hole 123 of the dial washer 120, and the dial washer 120 can be prevented from falling off with a simple configuration. Further, when the dial washer 120 is inserted into the shaft portion 112, the dial washer 120 can be smoothly inserted until the dial washer 120 comes into contact with the projection 11, and therefore, the pointer can be reliably fixed without damaging the pointer attachment position while suppressing the occurrence of foreign matter.

[ second embodiment ]

Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

Fig. 4 is a schematic view of essential parts of a hand display type timepiece according to a second embodiment of the present invention, in which (a) is a plan view and (b) is a C-C sectional view.

In the figure, the pointer display timepiece of the present embodiment differs from the pointer display timepiece of the first conventional example in that a pair of hooks 16 for locking the dial washer 120 are provided on the upper surface of the gear portion 111 of the hour wheel 110. Other constituent elements are basically the same as those of the first conventional example.

Therefore, in fig. 4, the same components as those in fig. 9, 10, and 11 are denoted by the same reference numerals, and detailed description thereof is omitted.

The hook 16 is a stopper member for preventing the movement of the dial washer 120 in the axial direction, and locks the outer periphery of the dial washer 120 in the direction of the diametrical line portion 121. In this way, even when the stopper member is the hook 16, the dial washer 120 can be easily attached to the hour wheel 110, and the dial washer 120 can be reliably fixed by the hook 16.

Further, the hook 16 is provided at two positions facing each other across the shaft portion 112, and the dial washer 120 can be fixed by locking the hook 16 at the two positions.

As described above, the dial washer 120 is formed in a structure bent with an arbitrary diameter linear portion 121 as a bottom portion, and the intersection position of the bottom portion and the outer periphery is locked by the hook 16. As described above, when the dial washer 120 is bent, the dial washer 120 can be strongly fixed to the bottom of the curved surface while providing a large elasticity to the dial washer 120. Further, since the dial washer 120 is not prevented from being warped, the instability of the spring force of the dial washer 120 can be reduced, the axial movement of the hour wheel 110 can be suppressed, and the hand misalignment can be reduced.

In this way, according to the pointer display type timepiece of the present embodiment, the dial washer 120 can be prevented from coming off by providing the hook 16 on the upper surface of the gear portion 111 of the hour wheel 110. Further, the occurrence of foreign matter can be suppressed, and the pointer can be reliably fixed without damaging the pointer attachment position. Further, it is possible to prevent the dial washer 120 from being unstable in spring force and thus being unable to reduce the occurrence of a problem of pointer deviation.

[ third embodiment ]

Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.

Fig. 5 is a schematic view of essential parts of a hand display type timepiece according to a third embodiment of the present invention, in which (a) is a plan view and (b) is a D-D sectional view.

In the figure, the pointer display timepiece of the present embodiment is different from the pointer display timepiece of the second embodiment in that the hook 16 is replaced with the adhesive member 17. Other constituent elements are basically the same as those of the second embodiment.

Therefore, in fig. 5, the same components as those in fig. 4 are denoted by the same reference numerals, and detailed description thereof will be omitted.

The adhesion member 17 is a stopper member for preventing the movement of the dial washer 120 in the axial direction, and fixes the diametrical line portion 121 of the dial washer 120 to the upper surface of the gear portion 111. In this way, by using the blocking member as the adhesive member 17, the dial washer 120 can be easily fixed only by pressing the dial washer 120 against the adhesive member 17 provided on the upper surface of the gear portion 111 of the hour wheel 110.

In addition, the dial washer 120 can be fixed only by the adhesive force with the adhesive members 17 at the two positions facing each other across the shaft portion 112 when the adhesive members 17 are provided at the two positions facing each other across the shaft portion 112.

As described above, the dial washer 120 is formed in a structure bent with an arbitrary diameter linear portion 121 as a bottom portion, and two portions of the bottom portion facing each other with the shaft portion 112 interposed therebetween are brought into contact with and fixed to the adhesive member 17. As described above, when the dial washer 120 is bent, the dial washer 120 can be strongly fixed to the bottom of the curved surface while providing a large elasticity to the dial washer 120. Further, since the dial washer 120 is not prevented from being warped, the instability of the spring force of the dial washer 120 can be reduced, the axial movement of the hour wheel 110 can be suppressed, and the hand misalignment can be reduced.

In this way, in the case of the pointer display type timepiece according to the present embodiment, the dial washer 120 can be prevented from coming off by providing the adhesive member 17 on the upper surface of the gear portion 111 of the hour wheel 110. Further, the occurrence of foreign matter can be suppressed, and the pointer can be reliably fixed without damaging the pointer attachment position. Further, it is possible to prevent the dial washer 120 from being unstable in spring force and thus being unable to reduce the occurrence of a problem of pointer deviation.

[ fourth embodiment ]

Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings.

Fig. 6 is a schematic view of essential parts of a hand display type timepiece according to a fourth embodiment of the present invention, in which (a) is a plan view and (b) is an E-E sectional view.

In the figure, the pointer display timepiece of the present embodiment differs from the pointer display timepiece of the first embodiment in that a projecting portion 11' is formed at a position on the upper surface of the gear portion 111 apart from the shaft portion 112 instead of the projecting portion 11. Other constituent elements are basically the same as those of the first embodiment.

Therefore, in fig. 6, the same components as those in fig. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

The three protrusions 11' protrude from the shaft portion 112 in the outer circumferential direction, and are provided at equal intervals in the circumferential direction of the shaft portion 112. Further, since the projecting portion 11' is formed at a position distant from the upper surface of the gear portion 111, the dial washer 120 is not inhibited from warping, and instability of the spring force of the dial washer 120 can be suppressed.

Here, it is preferable that the convex portion 11 'is provided with tapered surfaces 13' at end portions (upper end portions in the present embodiment) corresponding to the longitudinal direction of the shaft portion 112. With this configuration, the dial washer 120 can be smoothly inserted into the protrusion 11'.

The hour wheel 110 is configured such that the diameter of an imaginary circle (not shown) contacting the three protrusions 11' is larger than the inner diameter of the circular hole 123 and the diameter of the shaft portion 112 is smaller than the inner diameter of the circular hole 123. That is, the dial washer 120 is loosely engaged between the convex portion 11 'and the gear portion 111 over the convex portion 11'. With this configuration, the dial washer 120 is loosely fitted to the shaft 112, and the dial washer 120 is not prevented from warping, so that the elastic force of the dial washer 120 is not unstable, and axial movement of the hour wheel 110 can be reliably suppressed, and hand misalignment can be reduced.

In the pointer display type timepiece having the above configuration, since the dial washer 120 is loosely fitted to the shaft portion 112, and the dial washer 120 is not prevented from warping, the elastic force of the dial washer 120 is not unstable, and the axial movement of the hour wheel 110 can be reliably suppressed, thereby reducing the pointer misalignment.

[ fifth embodiment ]

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

Fig. 7 is a schematic view of essential parts of a pointer display timepiece according to a fifth embodiment of the present invention, in which (a) is a plan view and (b) is an F-F sectional view.

In the figure, the pointer display timepiece of the present embodiment differs from the pointer display timepiece of the first embodiment in that the convex portion 11 is replaced with a first convex portion 11a and a second convex portion 11 b. Other constituent elements are basically the same as those of the first embodiment.

Therefore, in fig. 7, the same components as those in fig. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

The first convex portion 11a protrudes from the shaft portion 112a in the outer circumferential direction, and has substantially the same structure as the convex portion 11 of the first embodiment. The second convex portion 11b is further protruded from the surface of the first convex portion 11a, and is provided apart from the gear portion 111. In the present embodiment, the first convex portion 11a is formed from the lower surface of the second convex portion 11b to the surface of the gear portion 111, so that the amount of projection of the second convex portion 11b with respect to the first convex portion 11a can be reduced, and the second convex portion 11b can be manufactured using a mold, that is, the mold can be easily and reliably removed, and the manufacturing cost can be reduced.

Here, it is preferable that tapered surfaces 13 and 13a as tapered portions are provided on the upper portions of the first convex portion 11a and the second convex portion 11b, respectively. With this configuration, the dial washer 120 can be smoothly inserted into the first projecting portion 11a and the second projecting portion 11b, and the dial washer 120 can be easily attached. In addition, a slope 13b may be provided below the second convex portion 11 b. With this configuration, when the hour wheel 110 is injection-molded by the inclined surface portion 13b, the completed hour wheel 110 can be easily released from the molding die. That is, by forming the convex portion in a two-stage structure of the first convex portion 11a and the second convex portion 11b, the height of the second convex portion 11b with respect to the first convex portion 11a can be reduced, the forming die can be easily pulled out, and the formability can be improved.

Fig. 8 is a schematic enlarged plan view for explaining a relationship between a convex portion and a circular hole of a dial washer in a pointer display type timepiece according to a fifth embodiment of the present invention.

In this figure, the hour wheel 110 is configured such that the diameter of the imaginary circle 15b in contact with the three second protrusions 11b is larger than the inner diameter of the circular hole 123 and the diameter of the imaginary circle 15a in contact with the three first protrusions 11a is smaller than the inner diameter of the circular hole 123. That is, the dial washer 120 is configured to be loosely fitted over the first projecting portion 11a between the second projecting portion 11b and the gear portion 111 over the second projecting portion 11 b. With this configuration, the axial position of the dial washer 120 is restricted between the second projecting portion 11b and the gear portion 111, and the dial washer 120 can be reliably prevented from coming off the hour wheel 110. Further, when the dial washer 120 is inserted into the shaft portion 112a, the gap between the shaft portion 112a excluding the protrusions 11a and 11b and the circular hole 123 of the dial washer 120 can be increased, and therefore the dial washer 120 can be smoothly inserted into the shaft portion 112 a.

In the pointer display type timepiece having the above configuration, since the dial washer 120 is loosely fitted to the shaft portion 112a (the first projecting portion 11a) and does not hinder the dial washer 120 from warping, the elastic force of the dial washer 120 is not unstable, and the axial movement of the hour wheel 110 can be reliably suppressed, thereby reducing the pointer misalignment.

The hand display timepiece of the present invention has been described above with reference to the preferred embodiments, but the hand display timepiece of the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made within the scope of the present invention.

For example, in the second and third embodiments, the protruding portion 11 is not formed on the shaft portion 112, but a configuration may be adopted in which the protruding portion 11 is formed on the shaft portion 112, and thus, the dial washer 120 can be positioned more reliably.

Industrial applicability of the invention

As described above, the hand display timepiece of the present invention is not limited to the assembled hand display timepiece, and can be effectively applied to a timepiece movement during assembly, for example.

Claims (30)

1. A pointer display type timepiece is provided with: the dial washer includes a dial washer having a hole through which the shaft portion of the dial washer is inserted, and a stopper member for preventing the dial washer from coming off the dial washer by preventing the dial washer from moving in an axial direction.

2. The timepiece with a hand display according to claim 1, wherein the stopper member is one or more protrusions protruding from the shaft portion in the outer circumferential direction.

3. The hand display type timepiece according to claim 2, wherein the projection is provided from above the gear portion surface of the hour wheel to above the axial direction of the shaft portion at a height of 2 to 6 times the thickness of the dial washer; further, the projection is engaged with the hole of the dial washer.

4. The timepiece with a hand display according to claim 3, wherein the projecting portion is provided downward with respect to a hand attachment position of the shaft portion.

5. The hand display type timepiece according to claim 3 or 4, wherein a tapered portion is formed at an upper portion of the convex portion.

6. The hand display type timepiece according to claim 3 or 4, wherein the inner diameter of the hole portion of the dial washer is larger than the outer shape of the hand mounting portion of the shaft portion and smaller than the diameter of the imaginary circle of the convex portion.

7. The hand display type timepiece according to claim 3 or 4, wherein the convex portion is provided in an odd number of three or more, and the convex portions are arranged at equal intervals.

8. The timepiece with a hand display according to claim 2, wherein the convex portion is formed at a position on the upper face of the gear portion away from the shaft portion.

9. The timepiece with a hand display according to claim 8, wherein the projecting portion is provided downward with respect to a hand attachment position of the shaft portion.

10. The hand display type timepiece according to claim 8 or 9, wherein a tapered portion is formed at an upper portion of the convex portion.

11. The timepiece with a hand display according to claim 8 or 9, wherein the dial washer is formed such that an inner diameter of a hole portion formed in the dial washer is larger than an outer shape of the shaft portion and smaller than a diameter of an imaginary circle of the convex portion, and the dial washer is passed over the convex portion and loosely fitted to the shaft portion between the convex portion and the gear portion.

12. The hand display type timepiece according to claim 8 or 9, wherein the convex portion is provided in an odd number of three or more, and the convex portions are arranged at equal intervals.

13. The timepiece with a hand display according to claim 2, wherein the projection is provided with a first projection projecting from the surface of the shaft portion, and a second projection further projecting from the surface of the first projection.

14. The timepiece with a hand display according to claim 13, wherein the first projecting portion and the second projecting portion are provided downward with respect to the hand attachment position of the shaft portion.

15. The hand display type timepiece according to claim 13 or 14, wherein a tapered portion is formed at an upper portion of the first convex portion and/or the second convex portion.

16. The hand display type timepiece according to claim 13 or 14, wherein a slope portion is provided at a lower portion of the second convex portion.

17. The hand display type timepiece according to claim 13 or 14, wherein an inner diameter of the hole portion of the dial washer is larger than a diameter of an imaginary circle of the first projecting portion and smaller than a diameter of an imaginary circle of the second projecting portion.

18. The hand display type timepiece according to claim 13 or 14, wherein the first convex portion and the second convex portion are provided in an odd number of three or more, and the first convex portion and the second convex portion are arranged at equal intervals.

19. The timepiece with a hand display according to claim 1, wherein the blocking member is a hook provided on the gear portion of the hour wheel, and a part of the dial washer is locked by the hook.

20. The hand display type timepiece according to claim 19, wherein the hook is provided at least two positions opposed to each other with the shaft portion interposed therebetween.

21. The hand display type timepiece according to claim 19 or 20, wherein the hook locks a part of the outer periphery of the dial washer.

22. The hand display type timepiece according to claim 19 or 20, wherein the dial washer is bent with an arbitrary diameter line portion as a bottom portion, and a crossing position of the bottom portion and an outer periphery is locked by the hook.

23. The timepiece with a hand display according to claim 1, wherein the stopper member is an adhesive member provided on the gear portion of the hour wheel, and the dial washer is fixed to the adhesive member.

24. The timepiece with a hand display according to claim 23, wherein the adhesive members are provided at least at two positions opposing each other with the shaft portion interposed therebetween.

25. The hand display type timepiece according to claim 23 or 24, wherein the dial washer is bent with an arbitrary diameter line portion as a bottom portion, and two portions of the bottom portion are in contact with the adhesive member.

26. The hand display type timepiece according to any one of claims 2, 19, or 23, wherein the hour wheel is made of resin.

27. The hand display type timepiece according to any one of claims 2, 19, or 23, wherein the dial washer is made of metal.

28. A pointer display type timepiece is provided with: an hour wheel having a shaft portion and a gear portion for mounting a pointer, and a dial washer having a hole portion through which the shaft portion of the hour wheel passes, wherein a stopper member comprising a protrusion for preventing the dial washer from coming off the hour wheel by preventing the dial washer from moving in an axial direction is provided on a part of the hour wheel; the convex part is provided with a first convex part protruding from the surface of the shaft part and a second convex part further protruding from the surface of the first convex part; the first convex portion is formed from a lower surface of the second convex portion to the gear portion surface.

29. The timepiece with a hand display according to claim 28, wherein an inner diameter of the hole portion of the dial washer is larger than a diameter of an imaginary circle of the first projecting portion and smaller than a diameter of an imaginary circle of the second projecting portion.

30. The timepiece with an indicator according to claim 28 or 29, wherein a tapered portion is formed at an upper portion of the first projecting portion and/or the second projecting portion, and a tapered portion is provided at a lower portion of the second projecting portion.