JP6247963B2 - Battery package and electronic watch - Google Patents

Description

  The present invention relates to a battery package and an electronic timepiece including the battery package.

  A battery with high energy density, such as a lithium secondary battery, may be used as a power source in accordance with an increase in power consumption due to high functionality of a small portable electronic timepiece such as a wristwatch or a pocket watch.

  In Patent Document 1, there is a button on an insulating holder having a battery housing portion having an opening on the bottom surface in order to improve safety during handling without impairing the convenience of individual management of such a high energy density type battery. A battery package is shown in which a battery of a type is accommodated and the battery is sandwiched and fixed between the holder and the peripheral edge of the upper surface of the battery by a conductive presser.

JP 2012-2111893 A

  An object of the present invention is to provide a battery package that is small and low-cost without impairing the convenience of individual management and handling safety of a button type battery having a high energy density, and an electronic timepiece including the battery package. Is to provide.

  The invention disclosed in the present application in order to solve the above problems has various aspects, and the outline of typical aspects of the aspects is as follows.

  (1) A button-type battery, a recess for accommodating the battery, a frame having an opening provided at a part of the bottom of the recess, and the opening is joined to the lower surface of the battery, and the upper surface abuts the frame. And a lead plate.

  (2) In (1), the lead plate is welded to the lower surface of the battery in the opening.

  (3) The battery package according to (1) or (2), wherein the lead plate is inserted into the frame in a horizontal direction, is positioned on the upper surface of the bottom, and abuts the frame at both ends.

  (4) The battery package according to (3), wherein the frame includes an abutting portion that abuts in an insertion direction when the lead plate is inserted.

  (5) In any one of (1) to (4), the frame is a battery package having irregularities on an outer periphery.

  (6) It has a battery package of (5) and a battery package housing part for housing the battery package, and an inner periphery of the battery package housing part includes a movement having a shape corresponding to the unevenness of the outer periphery of the frame. Electronic clock.

  (7) In (6), when another button type battery is inserted into the battery package housing portion instead of the battery package, at least one of the electrodes of the other battery is electrically connected to the movement. Not an electronic watch.

  (8) An electronic timepiece including a movement having the battery package according to (5), a battery package housing portion for housing the battery package, and a concave / convex detecting portion for detecting the concave / convex portions on the outer periphery of the frame.

  According to the above aspect (1), the battery package can be made small and low-cost without impairing the convenience of individual management and safety during handling of a button type battery having a high energy density.

  According to the above aspect (2), detachment from the battery frame can be suppressed.

  According to the side surface of (3) above, when assembling the battery package, the lead plate is difficult to separate from the frame, and the assembling work is facilitated.

  According to the side surface of the above (4), the lead plate is positioned with respect to the frame, and a defect that the position of the lead plate is shifted is prevented.

  According to the side surface of the above (5), by utilizing the irregularities on the outer periphery of the frame, it is possible to prevent a button-type battery having no frame from being erroneously inserted in the movement, or to provide a button-type battery having no frame. It can be detected that it has been inserted.

  According to the side surface of the above (6), it is possible to prevent a button type battery having no frame from being erroneously inserted.

  According to the side surface of the above (7), it is possible to prevent a charging voltage from being applied to an erroneously inserted battery.

  According to the above aspect (8), it is possible to detect whether a battery package is inserted or a button-type battery having no frame is inserted.

It is a top view of the electronic timepiece concerning the embodiment of the present invention. It is a perspective view of the movement of the electronic timepiece concerning the embodiment of the present invention. It is a top perspective view of a battery package. It is a bottom surface perspective view of a battery package. It is a figure which shows the assembly method of a battery package. It is sectional drawing in the VI-VI line of FIG. It is a disassembled perspective view of a movement. It is sectional drawing by the cross section containing the battery package of a movement. It is a bottom perspective view showing one modification of the battery package according to the embodiment of the present invention.

  FIG. 1 is a plan view of an electronic timepiece 1 according to an embodiment of the present invention. In this embodiment, the electronic timepiece 1 is shown as a wristwatch, but other types such as a pocket watch may be used as long as they are small and portable.

  Reference numeral 2 in the drawing denotes an exterior case, and band attaching portions 3 are provided at the 12 o'clock position and the 6 o'clock position. A crown 4 is provided on the side of the 3 o'clock side of the electronic timepiece 1. In the figure, the 12 o'clock direction of the electronic timepiece 1 is the upward direction in the figure, and the 6 o'clock direction is the downward direction in the figure.

  The electronic timepiece 1 is a pointer type as shown, and the hour hand, the minute hand, and the second hand are provided coaxially with the central position of the electronic timepiece 1 as the center of rotation. In this embodiment, the second hand is coaxial with the hour hand. However, like a chronograph type timepiece, the second hand may be replaced with a so-called chronograph hand, and the second hand may be arranged at an arbitrary position as a sub hand. Further, a date window is provided at the 6 o'clock position of the dial so that the date display displayed on the date dial can be visually recognized. Note that the electronic timepiece 1 of the present embodiment is a so-called radio timepiece, and a display 5 for informing the user of the reception state is stamped or printed at a position outside the dial of the outer case 2. The second hand indicates one of these indications 5 during and before reception of the radio wave including time information, in this embodiment, during reception of the radio wave from the artificial satellite in the global positioning system.

  FIG. 2 is a perspective view of the movement 6 of the electronic timepiece 1 according to the present embodiment. The movement 6 includes a movement main body 7 and a battery package 8. Here, the movement main body 7 is a movement 6 of the electronic timepiece 1 in which power-related components, that is, a battery package 8 to be described later is removed, and an electronic circuit board including a timepiece circuit, a motor, a train wheel, and the like. Includes a frame called the main plate to hold. The battery package 8 means a battery 9, a frame 10 that houses the battery 9, and a member that is configured integrally therewith. In this embodiment, in addition to the battery 9 and the frame 10, a lead plate that will be described later is included. The battery package 8 is configured by three members. The battery package 8 is fixed by attaching a battery package retainer 11 also serving as a positive electrode to the movement body 7 with a screw 12. In FIG. 2, the battery package holder 11 is shown separated from the movement 6.

  FIG. 3 is a top perspective view of the battery package 8. The battery 9 is a button type as shown, and is a lithium secondary battery in this embodiment. The upper surface and side surface of the battery 9 visible in the figure are positive electrodes, and the lower surface hidden in the figure is a negative electrode. This is a model of a general button type battery, but the polarity is not particularly limited, and may be reversed. For convenience, the electrode having the polarity on the upper surface side is hereinafter referred to as the upper surface electrode, and the electrode having the electrode on the lower surface side is referred to as the lower surface electrode.

  The battery 9 is housed in an insulating frame 10, and the side and bottom surfaces of the battery 9 are generally covered and exposed less, while the upper surface of the battery 9 is not covered by the frame and is almost entirely covered (this implementation). In the form, the entire surface) is exposed. In general, on the upper surface of the battery 9, information relating to its production, for example, a production number, a production lot number, a production date, and the like are displayed by a method such as printing, engraving or laser marking, but in the battery package 8 according to the present embodiment, Since almost the entire upper surface of the battery 9 is exposed, visual recognition of information relating to the manufacturing is not hindered.

  The frame 10 has irregularities on the outer periphery. This is because, as will be described later, when the battery package 8 is inserted into a predetermined position of the electronic timepiece 1, the orientation and position of the battery package 8 are uniquely determined, and any commercially available button-type battery that is not the battery package 8 is used. This is to prevent erroneous insertion. In addition, although the material and manufacturing method of the frame 10 are not specifically limited, For example, it can manufacture by injection molding with a synthetic resin material.

  FIG. 4 is a bottom perspective view of the battery package 8. An opening is partially provided in the bottom 13 that covers the lower surface of the battery 9 of the frame 10. In the present embodiment, two first openings 14 and second openings 15 are provided as openings. A lead plate 16 which is a plate member made of an appropriate metal such as copper or stainless steel is disposed on the upper surface of the bottom 13 of the frame 10. In the figure, a portion where the lead plate 16 is hidden by the bottom 13 and cannot be seen is indicated by a broken line. The lead plate 16 is a strip-like member whose overall length is approximately the same as or slightly shorter than the diameter of the frame 10, and extends horizontally from a lead plate insertion opening 17 that is an opening provided so as to straddle the bottom and side walls of the frame 10. It is inserted and abuts against an abutting portion 18 which is a projection formed on the opposite side of the lead plate insertion opening 17 of the frame 10.

  Therefore, the lead plate 16 is exposed on the lower surface side of the battery package 8 in the first opening 14. The lead plate 16 is provided with a lead plate opening 19, and the position of the lead plate opening 19 coincides with the second opening 15 when the lead plate 16 is inserted into the frame 10. In the second opening 15, the lower surface of the battery 9 is exposed.

  At the position of the first opening 14, the lead plate 16 and the lower surface of the battery 9, that is, the lower surface electrode are joined. This joining is preferably performed by a method that is strong and electrically conductive. Therefore, in this embodiment, both are weld-joined by the spot welding technique. In FIG. 4, the locations where welding has been performed are indicated by the welding marks shown by shading. The second opening 15 is used for bringing a welding electrode into contact with the lower surface of the battery 9 when spot welding is performed. Although it is inferior to welding in terms of strength, it is also possible to join the lead plate 16 and the negative electrode of the battery 9 by other methods such as brazing or soldering.

  FIG. 5 is a view showing a method for assembling the battery package 8. First, the lead plate 16 is inserted into the frame 10 in the horizontal direction indicated by the white arrow A in the figure. At this time, the lead plate 16 is inserted from the lead plate insertion port 17 of the frame 10 and abuts against the abutting portion 18 while being slidably accommodated in the groove 20 provided in the bottom 13. In this example, a notch 21 corresponding to the abutting portion 18 is provided at the end of the lead plate 16, and after the lead plate 16 is inserted, the lead plate 16 is held by the frame 10 without wobbling. It has become so. The depth of the groove 20 is substantially equal to the thickness of the lead plate 16, and is designed so that the upper surface of the lead plate 16 and the upper surface of the bottom 13 are substantially flush with each other after the lead plate 16 is inserted. Has been.

  In this state, the battery 9 is then housed in the recess 22 of the frame 10 as indicated by the white arrow B in the figure. Here, the recess 22 is a space defined by the bottom 13 and a side wall provided on the outer periphery of the frame 10. As a result, the side surface and the lower surface of the battery 9 are almost covered with the frame 10.

  Finally, from the lower surface side, the battery 9 and the lead plate 16 are welded and joined in the first opening 14.

  6 is a cross-sectional view taken along line VI-VI in FIG. Here, since the battery 9 and the lead plate 16 are welded together, they are integrated without being separated from each other. At this time, even if an upward force is applied to the battery 9, the battery 9 is not detached from the frame 10 because the upper surfaces of both ends of the lead plate 16 abut against the frame 10. Further, when a downward force is applied to the battery 9, the lead 16 and the battery 9 are supported by the bottom 13 of the frame 10 (refer to FIG. 5 for the point where the battery 9 is supported by the bottom 13). Also in this case, the battery 9 is not detached from the frame 10. In this way, in the present embodiment, the battery 9 is accommodated in the frame 10 without detachment from the battery 9, the frame 10, and the lead plate 16, and the battery package 8 is made compact. And low cost. In particular, most of the side surface and the lower surface of the battery 9 are covered with the frame 10, and the upper surface of the battery 9 is exposed so as to be visible. Management convenience is guaranteed.

  FIG. 7 is an exploded perspective view of the movement 6. The movement main body 7 is provided with a battery package housing portion 23 which is a recess for housing the battery package 8. On the inner peripheral surface of the battery package housing portion 23, unevenness having a shape corresponding to the unevenness on the outer periphery of the frame 10 of the battery package 8 is provided. In the example shown in the figure, for example, three convex portions 24 projecting inward of the battery package housing portion 23 and the flat portion 25 provided on a part of the inner peripheral surface of the battery package housing portion 23 are uneven. It corresponds to.

  By providing such irregularities, the orientation of the battery package 8 is determined when the battery package 8 is inserted into the battery package housing portion 23, and contact terminals (not visible in FIG. 7) provided on the movement body 7. And the lead plate of the battery package 8 reliably contact each other without shifting their positions. Moreover, the unevenness | corrugation of the internal peripheral surface of the battery package accommodating part 23 prevents the situation where other button batteries with the same external shape as the battery package 8 and other battery packages with different shapes are erroneously inserted into the battery package accommodating part 23. Is done.

  Further, the battery package 8 inserted into the battery package housing 23 is fixed by the battery package holder 11. Further, the surface of the movement main body 7 other than the battery package holder 11 is covered with a magnetic shield 26, and the upper electrode of the battery 9 is electrically connected to the exterior case of the electronic timepiece 1 (not shown) via the battery package holder 11 and the magnetic shield 26. ing.

  FIG. 8 is a cross-sectional view of the movement 6 including a battery package 8. Here, the movement main body 7 is an assembly composed of various parts such as a ground plane, a circuit board, various electronic components, a train wheel, and a motor, but the detailed structure is not shown here, and only the outer shape is shown. It was.

  As illustrated, the battery package 8 is housed in a battery package housing portion 23 provided in the movement main body 7 and is fixed by a battery package holder 11. And, the upper surface side of the battery package housing portion 23 of the movement main body (the upper direction in the figure is the back cover side of the electronic timepiece 1, and the lower direction is the windshield side on which the dial or the like is arranged. A contact terminal 27 is provided on the outer peripheral portion of the battery cover 8 and elastically with the end of the lead plate 16 of the battery package 8. Contact is made and conduction is obtained. The movement body 7 obtains electric power from the battery 9 through the contact terminals 27.

  In practice, the position of the contact terminal 27 may be any position as long as it can contact the lead plate 16, but in the present embodiment, the contact terminal 27 is particularly arranged on the outer periphery of the battery package housing portion 23. This is because, instead of the battery package 8, another battery of a button type, for example, a button battery having a size that fits further inside the convex portion 24 (see FIG. 7) on the outer periphery of the battery package housing portion 23. This is to prevent the contact terminal 27 from coming into contact with at least one electrode of the button battery, in this case, the lower surface electrode, when it is mistakenly accommodated in 23. With this structure, when a primary battery or a secondary battery having different charging characteristics from the battery 9 planned in the present embodiment is inserted as another battery, a charging voltage is applied between both electrodes. It prevents liquid leakage and rupture caused by it.

  Further, the movement main body 7 may be provided with an unevenness detecting unit for detecting unevenness on the outer periphery of the frame 10 of the battery package 8. When the unevenness is detected normally using this unevenness detection unit, it can be seen that the battery package 8 is inserted. Therefore, when power is generated using a solar cell or the like, the charging voltage is applied. If the detection of irregularities fails, there is a possibility that another button type battery that is not a battery package, a primary battery, or a secondary battery with different charging characteristics may be inserted. Is possible. As described above, by providing the unevenness detecting section, it is possible to use both the battery package 8 having the secondary battery and the button-type other battery which is the primary battery or the secondary battery. Although the specific structure of the unevenness detection unit is not particularly limited, for example, it can be easily realized by configuring the unevenness on the outer periphery of the frame 10 with a contact type or optical sensor.

  The structure and shape of the battery package 8 described above are selected in consideration of the ease of manufacturing, the strength during handling, the manufacturing cost, etc., and are not necessarily as illustrated. It may not be necessary and may be modified appropriately.

  For example, FIG. 9 is a bottom perspective view showing one modification of the battery package 8 according to the present embodiment. This figure corresponds to FIG. 4 described above.

  In this modified example, an opening 28 is provided in the bottom 13 of the frame 10 in place of the groove 20 as shown in FIG. Therefore, in a state where the lead plate 16 is not disposed, the lower electrode of the battery 9 looks like a band from the opening 28. In this state, the strip-shaped lead plate 16 is disposed in the opening 28, applied to the lower surface of the battery 9, and the lead plate 16 and the negative electrode of the battery 9 are spot welded and fixed using the lead plate opening 19. Also in FIG. 9, the places where welding was performed in the same manner as in FIG. 4 are indicated by showing the welding traces with shading.

  Even in this case, the upper surface of both ends of the lead plate 16 abuts the frame 10 with respect to the upward force acting on the battery 9, and the lower surface of the battery 9 is the bottom 13 with respect to the downward force acting on the battery 9. Therefore, the battery 9 is not detached from the frame 10 again.

  In this modification, it is necessary to pay attention so that the position of the lead plate 16 does not shift when the battery package 8 is assembled, particularly when the battery 9 and the lead plate 16 are welded and fixed. The shape will be simple.

  In the above modification, the shape of the lead plate 16 is not necessarily the strip shape shown here, and the upper surface of the lead plate 16 abuts against the frame 10 when the battery 9 is fixed to prevent the battery 9 from being detached. Any shape can be used as long as it can be used. Further, instead of the lead plate opening 19, an opening may be provided at an appropriate position on the bottom 13 of the frame 10 so that the welding electrode is brought into contact with the lower surface of the battery 9.

  Alternatively, as a further modification, when the frame 10 is molded, the lead plate 16 is incorporated into a molding die, and both are integrally molded by a so-called insert molding method, and the battery 9 is accommodated in the molded product. The battery 9 and the lead plate 16 may be fixed by an appropriate method such as welding. In this case, the process of attaching the lead plate 16 to the frame 10 when the battery package 8 is assembled can be reduced.

  As mentioned above, although embodiment concerning this invention was described, the specific structure shown in this embodiment was shown as an example, and it is not intending limiting the technical scope of this invention to this. Those skilled in the art may appropriately modify these disclosed embodiments, and it should be understood that the technical scope of the invention disclosed herein includes such modifications.

  DESCRIPTION OF SYMBOLS 1 Electronic timepiece, 2 Exterior case, 3 Band attachment part, 4 Crown, 5 Display, 6 Movement, 7 Movement main body, 8 Battery package, 9 Battery, 10 Frame, 11 Battery package holder, 12 Screw, 13 Bottom, 14 1st , 15 second opening, 16 lead plate, 17 lead plate insertion slot, 18 abutting portion, 19 lead plate opening, 20 groove, 21 notch, 22 recess, 23 battery package housing portion, 24 projection, 25 Plane portion, 26 anti-magnetic plate, 27 contact terminal, 28 opening.

Claims (8)

A button-type battery,
A recess for accommodating the battery; and a frame having an opening provided in a part of the bottom of the recess;
A lead plate that is bonded to the lower surface of the battery in the opening and the upper surface abuts against the frame;
I have a,
The lead plate is a battery package welded or brazed to the lower surface of the battery in the opening . 2. The battery package according to claim 1 , wherein the lead plate is inserted into the frame in a horizontal direction, is positioned on an upper surface of the bottom, and abuts against the frame at both ends. The frame, when the lead plate is inserted, the battery package of claim 1 or 2 having a contact part per impinging on the insertion direction. The frame, battery package according to any one of claims 1 to 3 having an uneven outer periphery. A battery package according to claim 4 ;
A battery package housing portion for housing the battery package;
An electronic timepiece including a movement having an inner periphery of the battery package housing portion corresponding to the irregularities on the outer periphery of the frame. 6. The electron according to claim 5 , wherein, instead of the battery package, when another button-type battery is inserted into the battery package housing portion, at least one of the electrodes of the other battery is not electrically connected to the movement. clock. A battery package according to claim 4 ;
A battery package housing portion for housing the battery package;
An electronic timepiece comprising a movement having an unevenness detecting unit for detecting unevenness on the outer periphery of the frame. A button-type battery,
A recess for accommodating the battery; and a frame having an opening provided in a part of the bottom of the recess;
A lead plate that is bonded to the lower surface of the battery in the opening and the upper surface abuts against the frame;
A battery package having
The frame has irregularities on the outer periphery,
A battery package housing portion for housing the battery package;
An electronic timepiece comprising a movement having an unevenness detecting unit for detecting unevenness on the outer periphery of the frame .

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