JP2000275366A - Bobbin for time piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bobbin commonly used even with change of placing position of a substrate. SOLUTION: This bobbin 12 is provided with a holding hole 17 for holding a stator 41, and a coil winding part 13 where a coil is wound and is constituted to attach on substrates 61 and 71 placed in the box. In this case, touching planes 20, 21a to 24a as a height level defining means for selectively defining the relative height level to the planes of the substrates 61 and 71 and this bobbin 12 according to the placing position of the substrates 61 and 71 in the box, and fitting planes 15a and 15b as fitting means for fitting in the substrates 61 and 71 according to the relative height level of the substrates 61 and 71 and binding the relative position to the substrates 61 and 71, are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timepiece bobbin incorporated in, for example, a timepiece movement.

[0002]

2. Description of the Related Art For example, in the case of a timepiece movement, in order to reduce manufacturing costs and the like, even if the specifications of the timepiece are different, gears, receiving plates,
There is a demand to use a motor and the like as common as possible. On the other hand, in the movement for a timepiece, if the specifications of the timepiece are different, the built-in components are naturally different. For example, in a movement for an alarm clock or a clock with a pendulum, a sounding body and a pendulum coil are incorporated in addition to components such as a gear and a motor. In addition, in the timepiece, in addition to parts such as gears and motors, a contact switch for outputting a code signal corresponding to each time at every hour, and a driving wheel which rotates the contact switch once in 12 hours. Is incorporated.

[0003]

In the above-mentioned movement, a sounding body and a pendulum coil built in the movement,
Alternatively, the height position at which the circuit board for driving the motor is mounted differs in the movement housing depending on the contact mechanism. On the other hand, since the bobbin around which the coil forming the stator unit of the motor is wound is directly fixed to the above-mentioned circuit board, the bobbin according to the position of the circuit board is required to keep the relative position of the motor to the rotor pinch constant. Had to be changed. For this reason, conventionally, in the movement for the alarm clock or the clock with the pendulum, and the movement for the timepiece, in order to share parts such as vehicles and motors, the mounting position is determined according to the position of the circuit board. Design different bobbins separately,
Had been manufactured.

The present invention has been made in view of the above-described problems, and has as its object to provide a timepiece bobbin that can be used in common even when the installation position of a substrate is changed.

[0005]

According to the present invention, there is provided a timepiece bobbin provided with a holding hole for holding a stator and a coil winding portion around which a coil is wound, the bobbin being mounted on a substrate provided in a housing. Height position defining means for selectively defining a relative height position between the substrate surface of the substrate and the timepiece bobbin in accordance with an installation position of the substrate in the housing; and a relative height between the substrate and the timepiece. Engaging means for engaging with the substrate in accordance with the position and restricting a relative position with respect to the substrate.

The height position defining means is formed at a different height position corresponding to the installation position of the substrate, and has a plurality of contact surfaces capable of contacting the substrate surface of the substrate. The means has a plurality of engagement surfaces that engage with the back side of the substrate according to the relative height position with respect to the substrate.

The height position defining means has a plurality of contact surfaces formed at different height positions corresponding to the installation position of the substrate, and capable of contacting the substrate surface of the substrate. The means has a plurality of engagement surfaces that engage with the back side of the substrate according to the relative height position with respect to the substrate.

In the present invention, the position of the clock bobbin is defined by the height position defining means according to the installation position of the substrate.
The clock bobbin is restrained at the position by the engagement means. Thereby, even if the installation position of the substrate in the housing is changed, the clock bobbin can be provided at a fixed height position in the housing, and the motor can be commonly used for movements of different specifications.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an assembly structure of parts of a timepiece movement according to an embodiment of the present invention, FIG. 2 is a view of the bobbin of FIG. 1 viewed from the direction of arrow A, and FIG. 4 is a view of the bobbin of FIG. 1 as viewed from the direction of arrow C, and FIG. 5 is a view of the bobbin of FIG. 1 as viewed from the direction of arrow D.

[0010] In FIG. 1, the movement to the upper housing 51 includes a substrate 71 represented by a solid line is supported from the inner surface 51a of the housing 51 to the position of the height H _A, a height H _B from the inner surface 51a Substrate 61 represented by a two-dot chain line supported at a position
And a stator unit 11 fixed to one of the substrate 71 and the substrate 61. The substrate 7
One or the substrate 61 is alternatively mounted on the housing 51.

The movement housing 51 has a support portion 52, and the support portion 52 has a step 52a. Height from the inner surface 51a of the step portion 52a of the support portion 52 is set to the height H _A or height H _B in accordance with the height position of the substrate 71 or substrate 61 supports. Although not shown, the support portions 52 are provided at a plurality of locations instead of one location.

The board 71 is a circuit board which is supported on the side near the inner surface 51a of the movement housing 51 and is used for, for example, a movement for an alarm clock or a clock with a pendulum. The board 61 is, for example, a circuit board used for a movement for a timepiece.
a contact switch for outputting a code signal corresponding to each time at every hour and a driving mechanism for driving the contact switch and making a full rotation in 12 hours. Is incorporated. For this reason, the substrate 61 is provided on the inner surface 51 a of the movement housing 51.
Is supported at a position higher than the substrate 71.

The stator unit 11 includes a bobbin 12 and
It has a stator 41 and a coil 31. The stator unit 11 forms a part of a stepping motor and rotates a rotor (not shown). As shown in FIG. 5, the stator unit 11 is provided at a predetermined position with respect to a gear 81 disposed at a predetermined position with respect to the casing of the movement. The stator 41 is made of a plate-shaped member made of a soft magnetic material, and is inserted and held in a holding hole 17 formed in the bobbin 12. The coil 31 is wound around the coil winding portion 13 of the bobbin 12, and the coil 3
The winding start and the winding end of 1 are connected to the substrate 71 or the substrate 61.

The bobbin 12 is formed of, for example, a resin such as plastic, and a holding hole 17 for holding the stator 41 penetrates through the center of the coil winding portion 13 around which the coil 31 is wound. . On one side of the holding hole 17, there is a claw-shaped locking portion 14 for locking one end of the stator 41. On the lower surface on one end side of the bobbin 12,
A fusion boss portion 16 extending in a direction perpendicular to the inner surface 51a of the housing 51 is formed.

The lower surface of the bobbin 12 facing the inner surface 51a of the housing 51 is a contact surface 20 that can contact the substrate surface 61a of the substrate 61. On this contact surface 20, the bobbin 1
2 is opposite to the side on which the fusion boss 16 is formed.
Engaging portion 1 formed in a direction perpendicular to inner surface 51a of
5 are formed. As shown in FIG. 1, the engaging portion 15 has a claw portion 15 d having an inclined surface 15 c at its tip, and has step portions formed at two different positions in the height direction. Substrate 61 and substrate 7
1 are formed with engagement surfaces 15b and 15a, respectively. The width of the claw portion 15d of the engaging portion 15 is as shown in FIG.
As shown in FIG. 5, the width of the engaging surface 15b above the claw portion 15d is smaller than the width of the engaging surface 15b.

Further, as shown in FIGS.
At four places on both ends of the bobbin 12 on the contact surface 20 of
Projecting portions 21 and 2 projecting toward inner surface 51a of housing 51
2, 23 and 24 are formed. The projecting portions 21 and 23 formed on both sides in the longitudinal direction of the bobbin 12 have the same shape, and a W-shaped positioning is formed on one side of the projecting portion 21 and the projecting portion 23. Engagement portions 21b, 2
1c, 23b and 23c are respectively formed. The protrusion 22 is formed on the flange of the bobbin 12, and the protrusion 24 is formed on the base end of the fusion boss 16. The upper surfaces of the protruding portions 21, 22, 23, and 24 have the same height, and constitute contact surfaces 21a, 22a, 23a, and 24a that can contact the substrate surface 71a of the substrate 71. The contact surfaces 21a, 2a of the projections 21, 22, 23, 24
The heights 2a, 23a, and 24a are the height _HA from the inner surface 51a of the housing 51 to the substrate 71 when the substrate 71 is supported by the housing 51, and the height when the substrate 61 is supported by the housing 51. in it is equal to the difference between the height H _B to the substrate 61.

FIG. 6 is a view showing one example of the substrate 61, as viewed from the back side of the substrate 61. FIG. Substrate 61
Are provided with escape holes 63, 64, each having a shape into which the projecting portions 21, 22, 23, 24 of the bobbin 12 can be inserted.
65, 66, an insertion hole 67 into which the support portion 52 of the housing 51 is fitted and inserted, and an insertion hole 62 into which the engaging portion 15 of the bobbin 12 is inserted. Engaging part 15 of bobbin 12
Is inserted into the notch 6 having a width corresponding to the width of the claw 15 d formed at the tip of the engaging portion 15.
2a. In addition, the width of the insertion hole 62 is
Is formed to have a width corresponding to the width of. Furthermore, the notch 6
Both sides of 2a are engaging surfaces 61b which engage with the engaging surfaces 15b, respectively.

Projecting engaging portions 63a and 65a are formed in the escape holes 63 and 65, respectively, and positioning engaging portions 21b and 21c of the projecting portions 21 and 23 formed on the bobbin 12 are formed. And 23b, 23c. The positioning engagement portions 21b, 21c and 23b, 23c and the engagement portions 63a, 65a are different in the position of the bobbin 12 on the substrate, for example, in the case of step-hand movement and continuous hand movement. The bobbin 12 is provided to position the bobbin 12 with respect to the substrate.
b and 23b engage with the engaging portions 63a and 65a. In the case of continuous hand movement, the positioning engaging portions 21c and 23c
3a, 65a.

FIG. 7 is a diagram showing an example of the substrate 71, as viewed from the back side of the substrate 71. Substrate 71
Has an insertion hole 72 into which the engaging portion 15 of the bobbin 12 is inserted.
And an insertion hole 73 into which the fusion boss portion 16 of the bobbin 12 is fitted and inserted, and an insertion hole 74 into which the support portion 52 of the housing 51 is fitted and inserted.

Next, a method of assembling the stator unit 11 (bobbin 12) to the substrates 71 and 61 will be described. First, the bobbin 12 of the stator unit 11 is mounted on the board 61. Boss part 16 for fusion of bobbin 12
Is inserted into the escape hole 66 of the substrate 61, and the fusion boss 1
The protrusion 24 formed at the base end of the base 6 fits into the escape hole 66. Similarly, each of the protrusions 21, 22, and 2 of the bobbin 12
3 fits into the escape holes 63, 64 and 65 of the substrate 61, respectively.

On the other hand, the claw portion 15 of the engagement portion 15 of the bobbin 12
d is inserted into the insertion hole 62 of the substrate 61, and when the bobbin 12 is pressed against the substrate 61, the inclined surface 15c of the claw portion 15d of the engaging portion 15 comes into contact with the end face of the notch 62a of the insertion hole 62,
The engaging portion 15 bends. The claw portion 15d of the engagement portion 15 is
1 through the insertion hole 62, the engagement surface 15b of the engagement portion 15
Is projected from the lower surface of the substrate 61, the engaging portion 15 is restored to the original state.

In this state, the contact surface 20, which is the lower surface of the bobbin 12, comes into contact with the substrate surface 61a of the substrate 61. Further, the engagement surface 15b of the engagement portion 15 faces the back surface of the substrate surface 61a of the substrate 61, and the engagement portion 61
By engaging the engagement surfaces 15b with the engagement surfaces 15b, the engagement portion 15 of the bobbin 12 does not come off the substrate 61, and the stator unit 11 (bobbin 12) is restrained with respect to the substrate 61.

The welding boss 16 has a tip protruding from the back surface of the substrate 61, and the tip is thermally melted to fuse the welding boss 16 to the substrate 61. Thus, the assembling of the bobbin 12 to the substrate 61 is completed. From this state, when the substrate 61 is mounted on the support portion 52 of the housing 51, the stator unit 11 (bobbin 12) is located at a predetermined position with respect to the gear 81 shown in FIG.

When the bobbin 12 of the stator 11 is mounted on the substrate 71, the fusion boss 16 of the bobbin 12 is inserted into the insertion hole 73 of the substrate 71, and each of the bobbins 12 is mounted on the substrate surface 71a of the substrate 71. Projecting parts 21, 22, 23,
The contact surfaces 21a, 22a, 23a, 24a of 24 are in contact. The engaging portion 15 of the bobbin 12 is
When the bobbin 12 is pressed against the board 71, the claw 1 of the engaging portion 15 is inserted into the end face of the insertion hole 72 of the board 71.
The 5d inclined surface 15c comes into contact, and the engaging portion 15 bends. When the claw 15d of the engaging portion 15 passes through the insertion hole 72 of the substrate 71 and the engaging surface 15a of the engaging portion 15 projects from the lower surface of the substrate 71, the engaging portion 15 is restored to its original state.

In this state, the engaging surface 15a of the engaging portion 15 of the bobbin 12 faces the back surface of the substrate surface 71a of the substrate 71, and the engaging portion 15 of the bobbin 12 does not come off the substrate 71. The bobbin 12 is restrained with respect to the substrate 71. In this state, as described above, the tip of the fusion boss 16 protrudes from the back surface of the substrate 71, and when the tip of the fusion boss 16 is fused to the back of the substrate 71,
The assembly of the bobbin 12 to the substrate 71 is completed.

In this state, when the substrate 71 is mounted on the support portion 52 of the housing 51, the stator unit 11 (bobbin 1) is mounted.
2) is located at the same height as when assembled to the substrate 61 with respect to the inner surface 51a of the housing 51, and is located at a predetermined position with respect to the gear 81 shown in FIG.

As described above, according to the present embodiment, even if the substrates 61 and 71 are supported at different heights with respect to the housing 51, the bobbin 12 can be used in common,
The stator unit can be shared. For this reason, even if the specifications of the timepiece movement are different, the number of components that can be commonly specified increases, and the cost of the timepiece movement can be reduced. Further, in the present embodiment, since the cutout portion 62a is formed in the insertion hole 62 of the substrate 61, the claw portion 15c of the engagement portion 15 is inserted without increasing the amount of deflection of the engagement portion 15 of the bobbin 12. It can be inserted into the hole 62. In addition,
In the present embodiment, the engagement portion 15 and the fusion boss 16 are provided on the bobbin 12, and the relative position is fixed by fusion with the substrate 61 or 71. Instead of providing the fusion boss 16, By providing another engaging portion 15 and forming an insertion hole corresponding to the substrate 61, 71 side, the position of the bobbin 12 can be adjusted without the fusion work.
1 can be bound. Further, by providing the fusion boss portion 16 instead of providing the engagement portion 15, it is also possible to adopt a configuration in which the relative position between the bobbin 12 and the substrate 61 or 71 is fixed.

[0028]

According to the present invention, the clock bobbin can be provided at a fixed height position in the housing even if the installation position of the substrate in the housing changes, and the motor can be shared by movements of different specifications. And the cost of the product can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an assembly structure of parts of a timepiece movement according to an embodiment of the present invention.

FIG. 2 is a view of the bobbin of FIG. 1 viewed from the direction of arrow A.

FIG. 3 is a view of the bobbin of FIG. 1 as viewed from the direction of arrow B.

FIG. 4 is a view of the bobbin of FIG. 1 as viewed from the direction of arrow C.

FIG. 5 is a view of the bobbin of FIG. 1 as viewed from the direction of arrow D.

FIG. 6 is a diagram showing a configuration example of a substrate 61, wherein the substrate 61
FIG. 4 is a view as viewed from the back side.

FIG. 7 is a view showing a configuration example of a substrate 71, and
FIG. 4 is a view as viewed from the back side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Stator unit 12 ... Bobbin 15 ... Engagement part 15a, 15b ... Engagement surface 20 ... Contact surface 21, 22, 23, 24 ... Projection 21a, 22a, 23a, 24a ... Contact surface 31 ... Coil 41 ... Stator 61, 62 ... substrate 81 ... gear

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shigeru Fukuoka 1-2-1 Kinshi, Sumida-ku, Tokyo Rhythm Watch Industry Co., Ltd. F-term (reference) 2F001 AA03 AB02 AG00 AG02 AG08

Claims (3)

[Claims] 1. A timepiece bobbin provided with a holding hole for holding a stator and a coil winding portion around which a coil is wound, the timepiece bobbin being mounted on a substrate provided in the housing, wherein a mounting position of the substrate in the housing is provided. Height position defining means for selectively defining a relative height position between the substrate surface of the substrate and the timepiece bobbin in accordance with: A timepiece bobbin having engagement means for engaging and restraining a relative position with respect to the substrate. 2. The apparatus according to claim 1, wherein the height position defining means has a plurality of contact surfaces formed at different height positions corresponding to the installation position of the substrate and capable of contacting the substrate surface of the substrate. 2. The timepiece bobbin according to claim 1, wherein the engagement means has a plurality of engagement surfaces that engage with a back surface of the substrate according to a relative height position with respect to the substrate. 3. 3. The apparatus according to claim 2, wherein the height position defining means has a plurality of contact surfaces formed at different height positions corresponding to the installation position of the substrate and capable of contacting the substrate surface of the substrate. 2. The timepiece bobbin according to claim 1, wherein the engaging means has a fusion boss fused to a back surface of the substrate in accordance with a relative height position with respect to the substrate. 3.