JPH0624796Y2 - Conductor structure of pointer display type electronic timepiece - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an electrically conductive structure of a pointer display type electronic timepiece.

[Conventional technology]

FIG. 3 shows an electrical conduction structure of a conventional pointer display type electronic timepiece,
It is shown in FIG. FIG. 3 is a plan view of a conventional pointer display type electronic timepiece, and FIG. 4 is a sectional view BB portion showing a screw tightening structure around the battery receiving spring in FIG.

In FIGS. 3 and 4, reference numeral 21 is a timepiece base, and 22 is a screw support column press-fitted into the timepiece base 21, which has a screw portion 22a and a flange portion 22b. The lower surface side of the brim portion 22b abuts the upper surface side of the timepiece base 21 to prevent the screw column 22 from tilting. The back support 23 is fitted and positioned by the screw support 22 and another screw support (not shown), and is stacked on the upper surface side of the flange portion 22b of the screw support 22. The back presser 23 is provided with a battery side pressure portion 23a for preventing the battery 24 from popping out and electrically connecting with the battery side surface portion 24a, and engages with the winding stem 25 when the winding stem 25 is operated. Mandarin duck 26
The mandrel pressing portion 23b that presses the upper surface of the mandrel 26 in order to prevent disengagement of the mandrel, and the mandrel shaft 26b that is engaged with the mandrel pin 26a formed on the mandrel 26 and press-fitted into the timepiece base 21. The mandrel engaging portion 23c is formed for positioning the mandrel 26 in a rotationally positioned state around the center of rotation and for positioning the winding stem 25 engaged with the mandrel 26. A battery receiving spring seat 27 made of a plastic material is arranged on the upper surface side of the back presser 23, and the screw support 2
2 and the hole 23e of the back presser 23 are fitted and positioned. Further, the battery 24 is provided on the upper surface side of the battery receiving spring seat 27.
A battery receiving spring 28 that electrically connects with the lower surface 24b of the battery receiving spring 28 is provided, and is positioned by the outer periphery of the convex portion 27a of the battery receiving spring seat 27 and the boss portion 27b. Since the battery receiving spring seat 27 is made of a plastic material, the back press 23 and the battery receiving spring 28 are electrically insulated. Battery spring 28
A circuit board 31 on which the IC 29 and the crystal unit 30 are mounted is disposed on the upper surface side of the
A conductive pattern (not shown) is formed on the upper surface portion 31b.

Based on such an arrangement structure, the fixing screw 32 is fixed to the screw support 2
In order to tightly fix the second brim portion 22b, the backing plate 23, the battery receiving spring 28, and the circuit board 31, the screw pillar 22 is tightened from the upper surface side of the circuit board 31. As a result, the battery 24
The electric potential (plus) of the side surface portion 24a of the fixing member 32 is applied to the brim portion 3 of the fixing screw 32 through the back press 23, the screw support 22, and the fixing screw 32.
The upper surface portion 31b of the circuit board 31 formed on the lower surface side of 2a
And the potential (minus) of the lower surface 24b of the battery 24 is guided to the circuit board 31 via the battery receiving spring 28.
Of the conductive pattern formed on the lower surface 31a of the
It is supplied as a power source for C29.

[Problems to be solved by the invention]

As in the above configuration, the back press on the upper surface side of the brim portion of the screw column press-fitted into the watch base, the battery receiving spring seat, the battery receiving spring,
Place the circuit board and tighten the fixing screws provided on the top side of the circuit board to fix these parts in close contact with the screw posts. In the structure for guiding (minus) to the conductive pattern formed on the circuit board, conductive patterns are required on both the upper and lower surfaces of the circuit board, and the conductive patterns on the upper and lower surfaces are connected to the IC mounting side. Through-hole processing for guiding the conductive pattern is also required, and the cost of the circuit board is high. In addition, a circuit board is required up to the periphery of the battery, and if a part on which an IC and a crystal resonator are mounted is included, the circuit board becomes a considerably large one, resulting in an increase in material cost and a reduction in timepiece cost.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a cheap and stable electric conduction structure of a pointer display type electronic timepiece with stable quality.

[Means for solving problems]

In order to achieve the above object, the present invention has the following configuration.

In other words, electronic components such as winding stems, train wheels, circuit boards, batteries and other electronic components, backing components such as mandarin duck, Kannuki or back press, and conductive members that convey the battery potential to the circuit board pattern. In a timepiece, a train wheel is provided substantially in the center of the watch, and a battery is arranged on one side and a circuit board having a single-sided pattern is arranged on the other side with respect to a line connecting the train wheel and the winding stem. A back presser, which is a fixing member, is provided, and the back presser presses the upper part of the mandrel to prevent disengagement of the mandrel engaged with the winding stem, and the mandrel formed on the mandrel. In addition to the mandrel engaging part for positioning the winding stem that engages with the pin and engages with the mandrel, the battery side pressure part that holds the battery and measures electrical continuity with the battery side surface, and the conduction pattern of the circuit board To one of the batteries A conduction spring portion for electrically conducting the battery is also formed, and the other potential of the battery is connected to the other potential pattern of the circuit board through the conduction member at a position where it does not planarly overlap with the backing plate. It has a conductive structure.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. First
1 is a plan view of a pointer display type electronic timepiece showing an embodiment of the present invention, and FIG. 2 is a sectional view AA section showing a structure of a back-pressing member around a battery shown in FIG.

In FIGS. 1 and 2, reference numeral 1 denotes a plate-shaped timepiece base that serves as a reference for assembling the various parts constituting the timepiece, and the timepiece base 1 is formed with a screw portion 1a. As for the arrangement of the clock, the train wheel group 11 is arranged at the center of the substantially clock, and the battery 4 is provided on both sides.
And the circuit board 9 are separately arranged, the motor is provided below, and the back part is provided above. Reference numeral 2 denotes an insulating spacer made of a plastic material, which is disposed on the lower surface side of the back presser 3, and has a function of insulating electrical connection between the lower surface portion 4a of the battery 4 as a part of electronic parts and the timepiece base 1. ing. The backing part 3 is provided on the upper surface side of the insulating spacer 2, the mandrel 6, which will be described later, and a pad (not shown) constitute a backing part. The back side 3 which is a fixing member arranged so as to straddle the winding stem 5 prevents the battery 4 from popping out and operates the battery side pressure portion 3a for measuring electrical conduction with the battery side surface portion 4b and the winding stem 5. The mandrel pressing portion 3b that presses the upper surface of the mandrel 6 to prevent disengagement of the mandrel 6 that is engaged (not shown) with the winding stem 5 and the mandrel 6 are formed. A mandrel engaging portion that positions the mandrel 5 engaged with the mandrel 6 by rotationally positioning the mandrel 6 around a mandrel shaft 6b that is engaged with the mandrel pin 6a and press-fitted into the timepiece base 1. 3c and IC7
A conductive spring portion 3d that electrically conducts the potential (plus) of the battery side surface portion 4b to a positive conductive pattern (not shown) formed on the lower surface portion 9a of the circuit board 9 on which the crystal oscillator 8 is mounted. Has been formed. Reference numeral 9 denotes a circuit board, which is a single-sided pattern circuit board having a conductive pattern on the lower surface side. 1
0 is a center support for tightly fixing the back presser 3 from the top side 1
Reference numeral 2 denotes a train wheel bridge which is disposed on the upper surface side of the center bridge 10 and rotatably supports the upper handle of the train wheel group 11 for indicating the time. 13 is arranged on the upper surface side of the train wheel bridge 12 and penetrates through the holes of the insulating spacer 2, the back presser 3, the center bridge 10, and the train wheel bridge 12 and is screw-fitted with the screw portion 1a of the timepiece base 1. It is a fixing screw. Reference numeral 14 denotes a battery receiving spring, which is arranged at a position which is considerably separated from the position of the back presser 3 and does not overlap in plan view as shown in FIG. The battery receiving spring 14 has a contact portion 14a for electrical conduction with the lower surface portion 4a of the battery 4, and a negative conductive pattern (not shown) on the lower surface portion 9a of the circuit board 9.
A lead portion 14b for electrically conducting the potential (minus) of the lower surface portion 4a of the battery 4 is formed on the.

With such an arrangement structure, the circuit board 9 having a single-sided pattern
Is arranged on the side opposite to the battery 4 with respect to the axis of the winding stem 5, and the fixing screw 13 is screw-fitted into the screw portion 1a of the timepiece base 1 so that the insulating spacer 2, the back presser 3, The bridge 10 and the train wheel bridge 12 are fixed, and another fixing screw 15 arranged near the battery receiving spring 14 is also screw-fitted to the screw portion (not shown) of the timepiece base 1 to receive the battery receiving spring. Fix 14

From the above, the potential of the side surface portion 4b of the battery 4 (plus)
Is a battery side pressure portion 3a and a conductive spring portion 3 formed on the back presser 3.
The electric potential (minus) of the lower surface portion 4a of the battery 4 is guided to the positive conductive pattern formed on the lower surface portion 9a of the circuit board 9 by d, and the battery receiving spring 14 located at a position where the electric potential (minus) does not overlap the back presser 3 in plan view. Contact portion 14a and lead portion 1 formed on the
4b leads to a negative conductive pattern formed on the lower surface 9a of the circuit board 9 via the conductive portion, and is supplied as a power source for the IC 7.

Further, since the potential (plus) of the side surface portion 4b of the battery 4 does not need to be electrically connected to the plus conductive pattern of the circuit board 9 via a member other than the back presser 3, a dedicated screw column is unnecessary and fixed. The screw 13 can be directly screwed into the screw portion 1a of the timepiece base 1.

The timepiece base 1 can be applied not only to a metal member but also to a plastic member.

[Effect of device]

As is apparent from the above description, the back presser for positioning and holding the backing components such as the mandrel, the winding stem and the like, the battery side pressure portion for holding the battery and measuring the electrical continuity with the side surface of the battery, the IC and the crystal oscillator. A conductive spring portion for electrically conducting the electric potential (plus) on the side surface of the battery is formed on the conductive pattern formed on the lower surface of the circuit board on which the battery is mounted, and the lower surface of the battery is positioned so as not to overlap the back press in plan view. A battery receiving spring for electrically conducting the battery is arranged, and the battery receiving spring is provided with a lead portion for electrically conducting the potential (minus) of the battery lower surface portion to the conductive pattern formed on the lower surface portion of the circuit board. By forming the conductive pattern, which is conventionally formed on both sides of the upper surface and the lower surface of the circuit board, the upper surface side becomes unnecessary, and the upper surface side,
Since the through-hole processing for connecting the conductive pattern on the lower surface side is not necessary, the cost of the circuit board can be reduced.

In addition, the circuit board does not need to extend over the axis of the winding stem to the periphery of the battery, and the size of only the periphery where the IC and the crystal unit are mounted becomes about 1/2 of the conventional size. The material cost of the circuit board is halved, and at the same time, the watch can be made thinner. Further, in the completed state of the module, the backing plate becomes a fixing member, and no pin or the like is required for contact with the circuit board, so that reliability of conduction is improved.

Further, in the conventional structure, the electric potential (plus) on the side surface of the battery is guided to the conductive pattern on the upper surface portion of the circuit board formed on the lower surface side of the brim portion of the fixing screw through the screw strut,
In the structure of the present invention, since the fixing screw is directly screwed and fixed to the screw portion formed on the timepiece base, the screw strut becomes unnecessary and the number of parts is reduced from three to one, which reduces the cost. The assembly cost for press-fitting the support pillar into the watch base and the processing cost of the screw support pillar become unnecessary. Therefore, the product cost of the watch is reduced, and the reliability of the power supply mechanism can be improved. Further, the structure of the present invention is also effective for making the base plate and the receiving plastic into a plastic product, which makes it possible to commercialize a competitive watch.

[Brief description of drawings]

FIG. 1 is a plan view of a pointer display type electronic timepiece showing an embodiment of the present invention, FIG. 2 is a cross sectional view showing an AA cross section of FIG. 1, and FIG. 3 is a plan view showing a conventional back pressing structure. Figure 4 is B of Figure 3
It is sectional drawing which shows B cross section. 1 ... Clock base, 3 ... Back press, 3a ... Battery side pressure part, 3D ... Conductive spring part, 4 ... Battery, 4a ... Battery bottom part, 4b ... Battery side part, 9 ... … Circuit board, 13 …… Fixing screw, 14 …… Battery receiving spring.

Claims (1)

[Scope of utility model registration request] 1. A winding stem as an external operating member, a train wheel for transmitting the driving force to a pointer, a circuit board on which an IC or a crystal oscillator is mounted, electronic parts such as a battery, and pointer correction. In a pointer display type electronic timepiece having a backing part such as a mandarin duck, a chestnut or a back press, and a conductive member for transmitting the electric potential of the battery to the pattern of the circuit board, the timepiece is provided at a substantially central portion of the timepiece. A train wheel is provided, a battery is arranged on one side and a circuit board having a single-sided pattern is arranged on the other side with respect to a line connecting the train wheel and the winding stem, and a backing plate, which is a fixing member, is arranged across the winding stem. The back presser engages with the mandrel pressing portion that presses the upper surface of the mandrel to prevent disengagement of the mandrel that has engaged with the winding stem, and the mandrel pin formed on the mandrel. Together the mandarin duck In addition to an oscillator engagement portion for positioning the winding stem that is engaged, a battery side pressure portion that holds the battery and measures electrical continuity with the battery side surface, and the battery in the conduction pattern of the circuit board A conduction spring portion for electrically conducting one of the electric potentials is also formed, and the other electric potential of the battery is disposed on the other side of the circuit board via a conduction member at a position where the electric potential of the other battery does not planarly overlap with the back retainer. Conductive structure of a pointer display type electronic timepiece characterized by being electrically connected to the electric potential pattern of.