JP4844408B2 - Charging terminal mounting structure - Google Patents

Description

  The present invention relates to a charging terminal mounting structure provided in an electronic device such as a cordless telephone with a built-in storage battery.

As a conventional charging terminal mounting structure, the charging terminal includes a charging terminal formed by bending one end side into a U-shaped cross-section, and a telephone case having a bottom and an enclosing wall, and one opening is provided. The charging terminal is sandwiched between the wall of the phone case from the opening end and the charging terminal is attached to the stud standing on the bottom of the phone case, so that the holding part exposed from the phone case is in electrical contact with the charging terminal of the charger. (For example, refer to Patent Document 1).
JP 2000-332869 A (paragraph “0003”, FIG. 6)

  Since the conventional charging terminal described above is provided with a clamping portion having a U-shaped cross section in a direction orthogonal to the direction in which the charging terminal extends, two bending processes are required to form this charging terminal. There was a problem that the manufacturing cost increased. In addition, the charging terminal clamping portion is simply sandwiched between the surrounding walls, and the surface side that is in electrical contact with the charging terminal of the charger is simply attached to the surface of the telephone housing. For this reason, the surface side may be deformed or peeled off from the surface of the telephone case due to long-term use, causing a contact failure.

  The present invention has been made in view of the above-described conventional problems, and its object is to reduce manufacturing costs and improve durability so that contact failure does not occur without deformation even after long-term use. The present invention provides a mounting structure for a charging terminal.

In order to achieve this object, the invention according to claim 1 is formed in a substantially U-shaped cross section by a terminal piece, a support piece facing the terminal piece, and a contact piece connecting the terminal piece and the support piece. A charging terminal; and a first case having an opening on one side by a front portion and an enclosure wall; and a terminal piece insertion hole through which the terminal piece of the charging terminal is inserted into the enclosure wall of the first case. A support piece insertion hole that is provided on the front side of the terminal piece insertion hole and through which the support piece is inserted, a stud is erected on the front portion of the housing, and the stud is provided on the terminal piece. A fastening insertion hole is provided for fastening to the upper surface of the terminal piece insertion hole and a lower wall of the support piece insertion hole. The terminal insertion hole is formed at the same interval as the interval between The vertical interval is formed larger than the thickness of the charging terminal, and the vertical interval of the support piece insertion hole is formed slightly larger than the thickness of the charging terminal, and the terminal piece insertion hole A protrusion is provided on the inner wall on the opening side, an engagement hole that engages with the protrusion is provided in the terminal piece, and the terminal piece is connected to the fastening insertion hole and extends to the engagement hole side. A notch is provided .

According to a second aspect of the present invention, in the first aspect of the invention, the second case covering the opening of the first case, and a print provided with a terminal portion that is in electrical contact with the terminal piece of the charging terminal. A wiring board, and the second case and the printed wiring board are laminated together and fastened together with the charging terminal to the stud.

According to the first aspect of the present invention, since the charging terminal as a whole has a very simple shape with a substantially U-shaped cross section, the charging terminal can be formed by a single bending process, thereby reducing the manufacturing cost. Can do. In addition, since both the terminal piece and the support piece of the charging terminal are inserted and attached to the inside of the housing, the contact piece exposed from the housing can be peeled off from the surface of the housing even for long-term use. Durability is improved because it does not deform. In addition, when attaching the terminal piece to the stud, the engaging hole of the terminal piece is engaged with the protrusion provided in the terminal piece insertion hole, so that the charging terminal does not cause a positional shift and workability for attachment Will improve. In addition, since the notch is provided in the terminal piece, when the terminal piece is inserted into the terminal piece insertion hole, the terminal piece engagement hole does not interfere with the protrusion of the terminal piece insertion hole without interfering with the protrusion. Therefore, workability is improved. Also, when the terminal pieces are inserted through the terminal piece insertion holes, the inclination angle of the terminal pieces can be minimized, so the vertical distance between the terminal piece insertion holes and the vertical direction of the support piece insertion holes Can be set to the minimum necessary interval. For this reason, since it becomes possible to expand the space | interval between the insertion hole for terminal pieces, and the insertion hole for support pieces, the area of the site | part which supports the contact piece of a housing | casing becomes large, and the intensity | strength of this site | part improves. When an external force is applied to the contact piece, the contact piece is not deformed, and the part supporting the contact piece is not damaged.

According to the second aspect of the present invention, since a cable or the like for electrically connecting the terminal piece and the terminal portion of the printed wiring board is not required, not only the number of parts is reduced, but also disconnection. Therefore, reliability is improved in quality. In addition, the fastening screws can be reduced and the assembly time can be shortened.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a cordless telephone having a charging terminal mounting structure according to the present invention. FIG. 1A is a front view, FIG. 1B is a bottom view, and FIG. 2 is an exploded rear view of the cordless telephone. FIG. 3A is a bottom view showing an enlarged main part of the front case, and FIG. 3B is an enlarged main part of the front case with a charging terminal attached thereto. 4 is a view taken in the direction of arrow IV in FIG. 3A, FIG. 5 is a charging terminal according to the present invention, FIG. 5A is a plan view, and FIG. 4B is the same drawing (A). V (B) -V (B) line cross-sectional view, FIG. 6 (C) is a bottom view, and FIG. 6 (A) is a cross-sectional view taken along line VI (A) -VI (A) in FIG. (B) shows a state where the charging terminal is attached, and FIG. (C) is a cross-sectional view taken along line VI (C) -VI (C) in FIG. 3 (B).

  1 is a front case 3 as a first case having an opening 2 (see FIG. 2) on one side, and a second case covering the opening 2 of the front case 3. As shown in FIG. A case of the cordless telephone 1 is formed by providing a rear case 4, bringing the open ends of the cases 3 and 4 into contact with each other, and combining the cases 3 and 4 by a method described later. As shown in FIG. 2, the front case 3 includes a front part 5 in which an engaging part 5 a is erected integrally, and an enclosing wall 6 erected from the periphery of the front part 5 so as to surround the front part 5. The enclosure wall 6 is formed in series by an upper wall 6A, a lower wall 6B, and both side walls 6C, 6D.

  As shown in FIG. 1 (A), a group of dial buttons 7 and a large number of function buttons 8 arranged in a matrix are provided on the front side of the front part 5 of the front case 3. An earpiece 9 is provided on the upper side, and a transmitter 10 is provided on the lower side of the front part 5. At both ends of the lower wall 6B of the enclosure wall 6, as shown in FIG. 2, a pair of recesses 11 and 11 into which a contact piece 18 of a charging terminal 15 described later is fitted are provided.

  An end of the recess 11 on the upper side in FIG. 6 (opening 2 side) is provided with a terminal piece insertion hole 12 formed in the shape of a long hole penetrating the lower wall 6B. A support piece insertion hole 13 formed in an elongated hole shape penetrating the lower wall 6B is provided at an end portion on the side (front portion 5 side). An upper wall (inner wall on the opening 2 side) 12a of the terminal piece insertion hole 12 is protruded on the lower side (front side 5 side) in the figure at the end in the arrow A direction (inner end of the front case 3). A protrusion 12b is provided.

  The distance D1 between the upper wall 12a of the terminal piece insertion hole 12 and the lower wall of the support piece insertion hole 13 is the distance L (between the upper surface of the terminal piece 16 of the charging terminal 15 and the lower surface of the support piece 17). (See FIG. 5). Further, the vertical interval D <b> 2 of the terminal insertion hole 12 is formed to be larger than the thickness of the charging terminal 15. On the other hand, the vertical interval D <b> 3 of the support piece insertion hole 13 is formed to be slightly larger than the thickness of the charging terminal 15.

  In FIG. 3A, reference numerals 14 and 14 denote a pair of studs which are integrally provided upright from the front portion 5 of the front case 3, and are provided with non-through holes 14a as shown in FIG. Is set lower than the upper wall 12 a of the terminal piece insertion hole 12 by the thickness of the charging terminal 15.

  In FIG. 5, reference numeral 15 denotes a charging terminal, which has a substantially U-shaped cross section by a terminal piece 16, a support piece 17 facing the terminal piece 16, and a contact piece 18 connecting the terminal piece 16 and the support piece 17. It is bent and formed. The terminal piece 16 has an engagement hole 16a that engages with the protrusion 12b on the contact piece 18 side, a fastening insertion hole 16b through which a self-tapping screw 24, which will be described later, is inserted, and a fastening insertion hole 16b. And a notch 16c that extends toward the engagement hole 16a. Thus, the charging terminal 15 is formed so as to have a very simple cross-sectional substantially U-shape, so that it can be formed by a single bending process.

  In FIG. 2, reference numeral 20 denotes a printed wiring board provided with insertion holes 21 and 21 through which the self-tapping screws 24 are inserted. On the back surfaces of the peripheral edges of these insertion holes 21 and 21, the terminal pieces 16 of the charging terminals 15 and The terminal part (not shown) which contacts electrically is printed. A pair of recesses 22 are provided at one end of the rear case 4, and an insertion hole (not shown) through which the self-tapping screw 24 is inserted is formed at the bottom of the recess 22. The rear case 4 is provided with a storage recess 23 for storing the storage battery.

  Next, a charging terminal mounting method in the charging terminal mounting structure thus configured will be described with reference to FIGS. 2 and 6. As shown in FIG. 6 (B), the terminal piece 16 and the support piece 17 of the charging terminal 15 are oriented obliquely upward to the right in the figure, the terminal piece 16 is used as the terminal piece insertion hole 12, and the support piece 17 is used as the support piece. Each is inserted through the insertion hole 13. At this time, since the notch 16c is provided in the terminal piece 16, the terminal piece 16 does not interfere with the protrusion 12b, so that the insertion work can be easily performed. Further, since the notch 16c is provided so that the terminal piece 16 does not interfere with the protrusion 12b, when the terminal piece 16 is inserted into the terminal piece insertion hole 12, the inclination angle of the terminal piece 16 is minimized. Limit. For this reason, since the vertical interval D2 of the terminal piece insertion hole 12 and the vertical interval D3 of the support piece insertion hole 13 can be set to the minimum necessary interval, the terminal piece insertion hole 12 and the support are supported. It becomes possible to expand the space | interval D4 between the insertion holes 13 for one piece within a predetermined range. Therefore, since the area of the part which supports the contact piece 18 of the recessed part 11 becomes large, since the strength of the recessed part 11 when an external force in the direction of arrow A is applied to the contact piece 18 is improved, the contact piece 18 is deformed, The concave portion 11 is not damaged.

  By slightly rotating the charging terminal 20 in the clockwise direction in the figure while pushing the charging terminal 20 in the direction of the arrow A, the protrusion of the terminal piece insertion hole 12 is inserted into the engagement hole 16a of the terminal piece 16 as shown in FIG. 12b is engaged, and the terminal piece 16 is mounted on the upper surface 14b of the stud 14. In this state, the fastening insertion hole 16 b of the terminal piece 16 faces the non-through hole 14 a of the stud 14, and the contact piece 18 contacts the recess 11.

  Thus, when the contact piece 18 contacts the recess 11, the charging terminal 20 is restricted from moving in the direction of arrow A, and the protrusion 12 b of the terminal piece insertion hole 12 is formed in the engagement hole 16 a of the terminal piece 16. By engaging, charging terminal 20 is also restricted from moving in the direction of arrow B.

  In this state, as shown in FIG. 2, the printed wiring board 20 is inserted into the front case 3 from the opening 2 side of the front case 3, and the engaged portion (not shown) of the rear case 4 is inserted into the front case 3. The engaging part 5a is engaged, and the opening ends of the front case 3 and the rear case 4 are brought into contact with each other. Next, the self-tapping screw 24 is inserted into the recess 22 of the rear case 4 and the insertion hole 21 of the printed wiring board 20, and screwed into the non-through hole 14 a of the stud 14 of the front case 3, whereby the printed wiring board 20 and the charging terminal 15. Are fastened together with the stud 14 and then the front case 3 and the rear case 4 are combined.

  At this time, as described above, since the charging terminal 15 is restricted from moving in the direction of the arrow AB, the charging terminal 15 can be easily and reliably fastened to the stud 14 together with the printed wiring board 20. Will improve. Further, by fastening the charging terminal 15 and the printed wiring board 20 together, terminal lands (not shown) provided at the peripheral edges of the insertion holes 21 and 21 of the printed wiring board 20 and the terminal pieces 16 of the charging terminal 15 are provided. And the charging terminal 15 and the printed wiring board 20 are electrically connected. Accordingly, a cable or the like for electrically connecting the terminal piece 16 and the terminal portion of the printed wiring board 20 is not necessary, so that the number of parts is reduced and the reliability is improved in quality because there is no disconnection. . In addition, the fastening screws can be reduced and the assembly time can be shortened.

  Further, by attaching the terminal piece 16 and the support piece 17 of the charging terminal 20 inserted through the terminal piece insertion hole 12 and the support piece insertion hole 13 of the front case 3 in the front case 3, The contact piece 18 exposed from the case 3 is not peeled off or deformed from the recess 11 of the front case 3 even when used for a long period of time.

  In the present embodiment, an example of a cordless telephone has been described as an electronic device provided with the charging terminal 15. However, the present invention can also be applied to various electronic devices that require charging.

The cordless telephone which implemented the attachment structure of the charging terminal which concerns on this invention is shown, The figure (A) is a front view, The figure (B) is a bottom view. It is the perspective view seen from the back side which decomposes | disassembles and shows the cordless telephone which implemented the attachment structure of the charging terminal which concerns on this invention. FIG. 2A is a bottom view showing an enlarged main part of a front case in a cordless telephone that has a charging terminal mounting structure according to the present invention, and FIG. 2B is a front case with the charging terminal attached thereto. It is a bottom view which expands and shows the principal part. It is IV arrow line view in FIG. 3 (A). The charging terminal which concerns on this invention is shown, The figure (A) is a top view, The figure (B) is the V (B) -V (B) sectional view in the figure (A), The figure (C) is a bottom face. FIG. 3A is a cross-sectional view taken along line VI (A) -VI (A) in FIG. 3A, FIG. 3B shows a state where a charging terminal is attached, and FIG. It is VI (C) -VI (C) sectional view taken on the line in B).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cordless telephone, 2 ... Opening, 3 ... Front case (1st case), 4 ... Rear case (2nd case), 5 ... Front part, 6 ... Enclosure wall, 6B ... Lower wall, 11 ... Recessed part, DESCRIPTION OF SYMBOLS 12 ... Terminal piece insertion hole, 12b ... Projection, 13 ... Support piece insertion hole, 14 ... Stud, 15 ... Charging terminal, 16 ... Terminal piece, 16a ... Engagement hole, 16b ... Fastening insertion hole, 16c ... Cutting Notch, 17 ... support piece, 18 ... contact piece, 20 ... printed wiring board, 24 ... self-tapping screw.

Claims (2)

A charging terminal formed in a substantially U-shaped cross section by a terminal piece, a supporting piece facing the terminal piece, and a contact piece connecting the terminal piece and the supporting piece, and having an opening on one side by the front portion and the surrounding wall A first case, and a terminal piece insertion hole through which the terminal piece of the charging terminal is inserted, and the front side of the terminal piece insertion hole. A support piece insertion hole through which the support piece is inserted, a stud is erected on the front portion of the housing, and a fastening insertion hole is provided to fasten the terminal piece to the stud,
The distance between the upper wall of the terminal piece insertion hole and the lower wall of the support piece insertion hole is formed at the same distance as the distance between the upper surface of the terminal piece of the charging terminal and the lower surface of the support piece. In addition, the vertical interval between the terminal insertion holes is formed larger than the thickness of the charging terminal, and the vertical interval between the support piece insertion holes is slightly larger than the thickness of the charging terminal. And
Providing a protrusion on the inner wall on the opening side of the insertion hole for the terminal piece, providing an engagement hole for engaging the protrusion on the terminal piece,
The charging terminal mounting structure according to claim 1, wherein the terminal piece is provided with a notch extending continuously to the fastening insertion hole and extending toward the engagement hole .   A second case covering the opening of the first case; and a printed wiring board provided with a terminal portion that is in electrical contact with a terminal piece of the charging terminal, the second case and the printed wiring board. The mounting structure for a charging terminal according to claim 1, wherein the charging terminal and the charging terminal are fastened together in a stacked state.

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