JP3711035B2 - Battery holder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery holder for housing a button-type battery used as a backup power source for a memory provided in a printed circuit board of an electronic device, for example.
[0002]
[Prior art]
For example, a printed circuit board of an electronic device such as a cellular phone has a memory, but a button-type battery is used as a backup power source. The battery holder plays a role of bridging the power supply between the substrate circuit and the button-type battery. For this battery holder, it is important that the stored button-type battery is not easily detached even when subjected to shock or vibration, especially when used for electronic devices that are subject to relatively large shock or vibration, such as mobile phones. Required as basic performance. In the conventional battery holder, in order to satisfy the button-type battery detachment preventing performance, a block-type holding portion for attaching a contact that makes conductive contact with the button-type battery is formed on the holder body that accommodates the button-type battery ( First prior art), an arc-shaped peripheral wall surrounding the peripheral side surface of the button-type battery in the circumferential direction is suspended (second prior art), and a button is provided on the block-shaped holding portion or the arc-shaped peripheral wall. There is a battery that has locking claws formed on the upper surface of the battery (see Japanese Patent Application Laid-Open No. 10-154493 as a similar technique).
[0003]
[Problems to be solved by the invention]
However, in the first prior art, since the locking claw to the holding portion of the high block-shaped rigid is formed, and a state of not deviate from previously normal accommodation position (yield capacity position. Hereinafter, The same is true.) If the button-type battery is not pushed in from the position positioned above, there is a problem that it is hard to be accommodated in the holder body. In particular, if the button-type battery is a small size that is difficult to handle with a diameter of 5 mm or less, a great deal of labor is required even if it is housed manually.
[0004]
In addition, in the second prior art, even if the button-shaped battery is slightly deviated from the normal housing position, the arc-shaped peripheral wall slightly bends outward when the button-shaped battery is pushed, The hardness at the time of pressing is relaxed compared to the first prior art. However, in this prior art, when the button-type battery is relatively larger than the accommodation space of the holder body due to the dimensional error of the button-type battery or the resin-molded holder body, the arc-shaped peripheral wall suspended from the holder body However, it will bend | forced forcibly by receiving the outward press by a button-type battery continuously. Then, the problem that cracks are likely to occur near the base of the peripheral wall, and the button-type battery comes off with a slight impact because it is locked to the upper surface of the button battery by point contact with the locking claw of the peripheral wall curving upward. There is a problem that it is easy to do. Moreover, since the arc-shaped peripheral wall surrounds the peripheral side surface of the button-type battery, the holder body must be formed in a size larger than that of the button-type battery, and the mounting area increases accordingly. There is also.
[0005]
The present invention has been made against the background of the prior art as described above, and its object is to reduce the mounting hardness of the button-type battery (which is hard and difficult to be accommodated in the holder body; the same applies hereinafter). Another object of the present invention is to provide a battery holder that can prevent cracks in the holder body and detachment of the button-type battery.
[0006]
[Means for Solving the Problems]
In order to achieve this object, a battery holder of the present invention, the battery holder forming a locking unit for locking the upper surface of the button-type battery holder body for accommodating the button-type battery, the locking portion of the button-type battery Osamu Description It is characterized in that it is formed in a columnar shape on the outside of the position, and the opposite surface of the lock portion facing the peripheral side surface of the button-type battery is formed inwardly in the center direction of the button-type battery.
[0007]
In this battery holder, because of the projecting lock portion columnar outside the yield capacity position of the button-type battery, also pushed do a button-type battery from above in a state deviated slightly from the accommodation position of the normal flexibility of the locking portion High and can be bent softly. Therefore, compared with a block-shaped holding part (first prior art) and a peripheral wall (second prior art), the mounting hardness can be reduced by high flexibility. Further, since the facing surface of the lock portion facing the peripheral side surface of the button-type battery is turned inward in the center direction of the button-type battery, the amount of bending of the lock portion is large accordingly. For this reason, the button-type battery is relatively larger than the holder body storage space due to the dimensional error of the button-type battery and the holder body, and even if the button-type battery accommodated in the lock part receives continuous pressing, it is greatly deflected. The dimensional error can be absorbed by the amount, and the occurrence of cracks near the base of the lock portion can also be prevented. In addition, the cross-sectional shape of the columnar lock portion may be any of a regular polygon shape, an irregular polygon shape, a perfect circle shape, an elliptical shape, or a composite shape thereof.
[0008]
Further, the battery holder is formed by projecting a claw portion for holding the upper surface of the button-type battery on the opposite surface of the lock portion, and tilting the locking surface of the claw portion to be locked to the upper surface downward. Can be configured.
[0009]
Due to dimensional errors of the button-type battery or the resin-molded holder main body, for example, the upper surface position of the button-type battery is higher in the height direction than the normal housing position, or the button shape is larger than the housing space of the holder main body. The battery may become relatively large, and may be warped by receiving continuous pressing from the button-type battery accommodated in the lock portion. In the present invention, a claw portion that holds the upper surface of the button-type battery is provided on the opposite surface of the lock portion, and the locking surface of the claw portion that is locked to the upper surface is formed to be inclined downward. Even in this case, the locking surface is locked in a point contact state or a surface contact state in which the locking surface is inclined downward with respect to the upper surface of the button-type battery. Accordingly, a sufficient locking force can be exerted, and the button-type battery does not come off even when subjected to an impact due to dropping or the like.
[0010]
Furthermore, the battery holder can be configured such that a holding wall that partially surrounds the peripheral side surface of the button-type battery in the circumferential direction and that is lower than the lock portion is integrally formed with the lock portion.
[0011]
Since the holding wall partially surrounds the circumferential side surface of the button-type battery in the circumferential direction, it is possible to prevent the button-type battery from being detached from the normal housing position even when an impact due to dropping or the like is applied. In addition, since the holding wall is integrally formed with a height lower than the height of the lock portion, the lock portion is hardly hindered and the lock portion can be reinforced against excessive bending or external force.
[0012]
In addition, the battery holder can be configured such that a recessed portion having a downward notch shape is formed in a continuous portion of the holding wall with the lock portion.
[0013]
By forming a downward notch-shaped concave portion in a continuous portion of the holding wall with the lock portion, it is possible to further improve the flexibility of the lock portion without changing the button-type battery detachment preventing function of the holding wall.
[0014]
The battery holder is configured such that an attachment portion for a contact that makes conductive contact with the button-type battery is formed in the holder body, and an engagement groove having an upward opening shape that press-fits the contact from above is formed in the attachment portion. it can.
[0015]
This battery holder has an engagement groove with an upward opening that press-fits the contact from above in the mounting portion of the contact, so that the holder body is sandwiched between the printed circuit board and the contact to be soldered to the printed circuit board. Can stick. Therefore, even when subjected to an impact such as a drop, the holder main body can be prevented from being detached from the printed circuit board by the bonding force of the contact with the soldered printed circuit board.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
The battery holder 1 according to this embodiment is configured by providing the holder body 2 with two contacts 3 and 4.
[0018]
The holder main body 2 is integrally formed of a thermoplastic resin having elasticity, and a total of four columnar lock portions 5 are provided outside the normal storage position of the button-type battery B. As shown in FIG. 4, each lock portion 5 is inwardly inclined in the direction of the center point P <b> _{1 of the} button-type battery B by the angle θ <b> _{1 with} respect to the vertical line Lv. ing. A claw portion 5b for holding the upper surface Bu of the button-type battery B accommodated in the holder main body 2 projects from the upper surface of the facing surface 5a. The claw portion 5b has a locking surface for locking to the upper surface Bu. 5c is is formed to be inclined downward as the angle theta ₂ to the horizontal Lh. In the angle theta ₁ and angle theta _2, the latter has a larger angle, thus facing surfaces 5a are locking surface 5c also deflected up along the vertical line Lv is a button type battery B in a state inclined downward The upper surface Bu is locked. Moreover, the bottom part 5d which spreads outward is formed in the lower end of the lock part 5 (refer FIG. 4).
[0019]
A holding wall 6 that is shorter than the lock portion 5 by a length d1 is integrally formed on one side surface of each lock portion 5 (see FIG. 5). The holding wall 6 partially surrounds the circumferential side surface Bs of the button-type battery B in the circumferential direction, and holds the button-type battery B in a state of being slightly in contact with the circumferential side surface Bs so as not to be pressed. .
[0020]
Contact mounting portions 8 and 9 are provided on the other side surface side of each lock portion 5 via a grooved slit 7. Thus, since the groove-shaped slit 7 is interposed between the lock portion 5 and the contact mounting portions 8 and 9, the flexibility of the lock portion 5 is not hindered. A mounting groove 8a is formed in the contact mounting portion 8, and the contact 2 that is in conductive contact with the lower surface Bd of the button-type battery B forming one electrode is press-fitted and fixed therein. A similar mounting groove 9a is also formed in the contact mounting portion 9, and the contact 4 that is in conductive contact with the peripheral side surface Bs of the button-type battery B forming the other electrode is press-fitted and fixed therein.
[0021]
The contact 3 is formed with a tail portion 3a, a bent portion 3b, and a spring contact portion 3c. The tail portion 3a is a portion to be soldered to the printed circuit board 10 and has a shape corresponding to the pattern shape of the board circuit. The bent portion 3b is formed with a fixed portion 3e extending left and right from the bent central portion 3d. A locking claw 3f protrudes laterally from the fixed portion 3e. When the contact 3 is inserted into the mounting groove 8a of the contact mounting portion 8, the locking claw 3f bites into and locks the inner wall, and the contact 3 is fixed to the holder body 2 by this locking force. The spring contact portion 3c extends from a base end portion 3g that is a connecting portion with the bent portion 3b, and two contact points that elastically conduct contact with the lower surface Bd of the button-type battery B on the front end side of the bifurcated shape. A portion 3h is formed. The base end portion 3g of the spring contact portion 3c is located within the thickness of the bottom mold of the holder body 2, and a sufficient spring length can be secured in both the length direction and the vertical direction. ing. Thus, the reason why the spring length can be sufficiently secured is that the holder body 2 is formed with the U-shaped cutout portion 2a having a large notch shape substantially corresponding to the outer shape of the contact 3. And since this U-shaped thinning part 2a was formed, the contact attachment part 8 is the shape divided | segmented into right and left, and the usage-amount of resin has decreased.
[0022]
Similarly to the contact 3, the contact 4 also has a tail portion 4 a soldered to the printed circuit board 10, a bent portion 4 b bent in a U-shaped cross section, and a spring in conductive contact with the peripheral side surface Bs of the button-type battery B forming the other electrode. A contact portion 4c is formed. The bent portion 4b of the contact 4 is also provided with a fixing portion 4d extending in the left-right direction, and the inner wall of the mounting groove 9a formed in the contact mounting portion 9 of the holder body 2 by the locking claw 4e of the fixing portion 4d. The contact 4 is fixed to the holder body 2 by this locking force.
[0023]
Next, the operation and effect of the battery holder 1 configured as described above will be described.
[0024]
(1). State the battery holder 1 in the embodiment, since projecting from the Hashiragata the lock portion 5 on the outside of the yield capacity position of the button-shaped battery B (position B in FIG. 2), which is out slightly from the yield capacity position (B) Even if the button-type battery B is pushed in from above, the lock portion 5 is highly flexible and can be bent flexibly. Because of this high flexibility, the mounting hardness of the button-type battery 5 can be reduced.
[0025]
(2). For example, in the case of a lock portion 5 'formed vertically without facing the facing surface 5a' as shown by a two-dot chain line in Fig. 6 (a), the lock portion 5 'is regular due to the dimensional error of the button battery B or the holder body 2'. When the button-type battery B is relatively larger than the storage space of the battery, and the continuous press from the stored button-type battery B is received, the lock portion 5 'largely warps outward as shown by the solid line, and its root There is a risk of cracking due to stress concentration in the vicinity. However, in the lock portion 5 of this embodiment, as shown by a two-dot chain line in FIG. 6B, the facing surface 5a facing the peripheral side surface Bs of the button-type battery B is inward in the direction of the center point P1 of the button-type battery B. Since it is tilted, the amount of bending of the lock portion 5 is large accordingly. Therefore, even if the button-type battery B is slightly larger than the accommodation space of the holder body 2 due to the dimensional error of the button-type battery B or the holder body 2, even if the button-type battery B is continuously pressed, Therefore, the dimensional error can be absorbed, and the occurrence of cracks near the base of the lock portion 4 can also be prevented.
[0026]
(3). Depending on the dimensional error of the button-type battery B or the resin-molded holder main body 2, for example, the upper surface position of the button-type battery B is higher in the height direction than the regular housing position (B), In some cases, the button-type battery B is relatively larger than the housing space, and the button-type battery B housed in the lock portion 5 is continuously pressed and warped. In such a case, as shown by a two-dot chain line in FIG. 6 (a), when the locking surface 5c 'to be locked to the upper surface Bu of the button-type battery B is horizontal, as shown by a solid line in FIG. 6 (a). When the horizontal locking surface 5c 'is warped upward, the button-type battery B is locked by point contact with the upper surface Bu of the button-type battery B. The button battery B is detached relatively easily. However, since the lock part 5 of this embodiment inclines the locking surface 5c of the nail | claw part 5b downward as shown by a dashed-two dotted line in FIG.6 (b), FIG.6 (b) also in such a case. ), The locking surface 5c is locked in surface contact with the upper surface Bu of the button-type battery B as indicated by a solid line. Accordingly, a sufficient locking force can be exerted, and the button-type battery does not come off even when subjected to an impact due to dropping or the like.
[0027]
(4). Since the holding wall 6 integrally formed with the lock portion 5 partially surrounds the circumferential side surface Bs of the button-type battery B in the circumferential direction, even when an impact due to dropping or the like is applied, the button-shaped battery B is formed in the button shape. It is possible to prevent the battery B from being detached. Moreover, since the holding wall 6 is integrally formed with a height lower than the height of the lock portion 5, the flexibility of the lock portion 5 is hardly hindered, and the lock portion 5 is prevented from being excessively bent and external force. Can be reinforced.
[0028]
(5). Further, the holder body 2 is formed in a substantially rectangular shape that is large in the longitudinal direction and small in the direction orthogonal to the longitudinal direction with respect to the diameter size of the button-shaped battery B accommodated in the regular accommodating position. Since the lock part 5 and the holding wall 6 are formed in a substantially rectangular diagonal position that is an empty space that does not interfere, the mounting area for the printed circuit board 10 can be reduced.
[0029]
(6). Since the mounting grooves 8a and 9a having an upward opening shape into which the contacts 3 and 4 are press-fitted from above are formed in the contact mounting portions 8 and 9 formed in the holder main body 2, the printed circuit board 10 and the contacts 3 to be soldered to the printed circuit board 10 are formed. 4 can be fixed to the printed circuit board 10 so as to sandwich the holder body 2 therebetween. Therefore, the holder body 2 can be prevented from being detached from the printed circuit board 10 by the bonding force of the contacts 3 and 4 to the soldered printed circuit board 10 even under impact such as dropping.
[0030]
The battery holder 1 according to the embodiment of the present invention as described above can be modified as follows.
[0031]
Moreover, in the said embodiment, as shown in FIG. 4, although the bottom part 5d was formed in the lower end of the lock part 5, the example which set the bending fulcrum P2 to the lock part 5 was shown, For example, as shown with a broken line in FIG. Alternatively, the skirt portion 5d may be eliminated, and the bending fulcrum P3 may be set at the lower end portion of the lock portion 5. In the former, the lock portion 5 bends around the bending fulcrum P2, but according to the latter, the bending fulcrum P3 becomes the lower end of the lock portion 5, so that the overall flexibility of the lock portion 5 can be further improved.
[0032]
In the above embodiment, the height of the holding wall 6 is constant. However, as shown by a broken line in FIG. 5, for example, a recessed portion 6 a having a downward notch shape may be formed in a continuous portion with the lock portion 5. According to this, it is possible to further improve the flexibility of the lock portion 5 while maintaining the function of preventing the button-type battery B from being held by the holding wall 6.
[0033]
【The invention's effect】
In the battery holder of the present invention, since the lock part protrudes in a column shape outside the normal storage position of the button-type battery, even if the button-type battery is pushed in from the upper side in a state slightly deviated from the normal storage position, the lock part The button-type battery can be accommodated by being highly flexible and flexible. Further, since the facing surface of the lock portion facing the peripheral side surface of the button-type battery is turned inward in the center direction of the button-type battery, the amount of bending of the lock portion is large accordingly. For this reason, the button-type battery is slightly larger than the housing space of the holder body due to the dimensional error of the button-type battery or the holder body, and even if the button-type battery stored is continuously pressed, the dimensional error is absorbed by the large amount of deflection. It is possible to prevent the occurrence of cracks near the base of the lock portion.
[0034]
In the battery holder of the present invention, a claw portion for holding the upper surface of the button-type battery is protruded on the opposite surface of the lock portion, and the locking surface of the claw portion that is locked to the upper surface is inclined downward. Even if the button-type battery or the resin-molded holder body has a dimensional error, for example, the upper surface position of the button-type battery is higher in the height direction than the normal housing position, and the lock part warps, the locking surface Is locked in a point contact state or a surface contact state inclined downward with respect to the upper surface of the button-type battery. Accordingly, a sufficient locking force can be exerted, and the button-type battery does not come off even when subjected to an impact due to dropping or the like.
[0035]
Since the battery holder of the present invention forms a holding wall that partially surrounds the peripheral side surface of the button-type battery in the circumferential direction, the button-type battery can be detached from the normal storage position even when an impact due to dropping or the like is applied. Can be prevented. In addition, since the holding wall is integrally formed with a height lower than the height of the lock portion, the lock portion is hardly hindered and the lock portion can be reinforced against excessive bending or external force.
[0036]
In the battery holder of the present invention, since the recessed part of the downward notch shape is formed in the continuous part of the holding wall with the lock part, the detachment preventing function of the button-type battery possessed by the holding wall remains unchanged, and the flexibility of the lock part is further improved. Can be made.
[0037]
In the battery holder of the present invention, the attachment portion of the contact that makes conductive contact with the button-type battery is formed in the holder body, and the engagement groove having the upward opening shape that press-fits the contact from above is formed in the attachment portion. It can be fixed to the printed circuit board so that the holder body is sandwiched between the circuit board and the contacts soldered thereto. For this reason, even when subjected to an impact such as dropping, the holder main body can be prevented from being detached from the printed circuit board by the bonding force of the contact with the soldered printed circuit board.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a battery holder according to an embodiment.
FIG. 2 is a plan view of a battery holder according to an embodiment.
3 is a cross-sectional view taken along line SA-SA in FIG.
4 is an enlarged sectional view taken along line SB-SB in FIG. 2;
5 is an enlarged sectional view taken along the line SC-SC in FIG.
6A and 6B are operation explanatory views of the lock portion of the battery holder, where FIG. 6A is an operation explanatory view of the lock portion according to a comparative example, and FIG. 6B is an operation explanatory view of the lock portion of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery holder 2 Holder main body 3, 4 Contact 5 Lock part 5a Opposite surface 5b Claw part 5c Locking surface 6 Holding wall 6a Recessed part 8, 9 Contact attachment part (attachment part)
8a, 9a Mounting groove (engagement groove)
10 Printed circuit board B Button type battery (regular housing position)
Bs Circumferential side Bu Upper surface P1 Center point of button-type battery

Claims (5)

In the battery holder in which a lock portion that is locked to the upper surface of the button-type battery is formed on the holder body that accommodates the button-type battery,
That the facing surfaces of the locking portion facing the peripheral surface of the button-type battery was formed by inverting the inner to the center of the button-type battery as well as projecting locking portion on the outside of the yield capacity position of the button-type battery columnar A battery holder. 2. A battery holder according to claim 1, wherein a claw portion for holding the upper surface of the button-type battery is provided on the opposite surface of the lock portion so as to project and the locking surface of the claw portion to be locked to the upper surface is inclined downward. . The battery holder according to claim 1 or 2, wherein a holding wall that partially surrounds the circumferential side surface of the button-type battery in the circumferential direction and that is lower in height than the lock portion is integrally formed with the lock portion. The battery holder according to claim 3, wherein a concave portion having a downward notch shape is formed in a continuous portion of the holding wall with the lock portion. 5. A contact mounting portion for conductive contact with the button-type battery is formed in the holder body, and an upward opening-shaped engagement groove for press-fitting the contact from above is formed in the mounting portion. The battery holder according to item.

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