JP4833016B2 - Inlet device for AC adapter - Google Patents

Description

  The present invention relates to an inlet device for an AC adapter having an inlet to which an outlet connected to an AC power supply side is attached and detached.

  In general, since portability is regarded as important for small electronic devices such as notebook computers, miniaturization (thinning) of an AC adapter attached to this type of electronic device is also an important issue. The AC adapter is provided with an AC input cord and a DC output cord derived from the AC adapter body. In particular, the AC input cord has a power plug that connects to an AC power source at one end and is attached to and detached from the AC adapter body at the other end. The outlet is attached to and detached from the inlet provided in the AC adapter main body. Therefore, the AC adapter main body incorporates an inlet that is a relatively large component, and this inlet cannot be ignored in reducing the size of the AC adapter.

For this reason, a technique related to the assembly of the inlet has been proposed. For example, in Japanese Patent Application Laid-Open No. 2000-77143, a power plug (outlet) connected to a commercial power source is inserted into the inlet to In the AC adapter that supplies power to the AC adapter, cut out a part of the power circuit board built in the AC adapter, and the inlet lower end part has a convex part and a concave part that fit into the notch part, and the board notch part and the inlet uneven part are fitted. Discloses an AC adapter which is thinned as a whole.
JP 2000-77143 A

  However, the above-described conventional AC adapter (AC adapter inlet device) has the following problems.

  First, since the inlet is directly mounted on the circuit board built in the AC adapter, trouble is likely to occur between the circuit board and the inlet. That is, since the AC input cord (outlet) is attached / detached to / from the inlet, the stress at the time of attaching / detaching is not a little added between the circuit board and the inlet, and troubles such as poor contact between the circuit board and the inlet are likely to occur due to long-term use. .

  Second, since the inlet fixed to the circuit board is exposed to the outside from the housing of the AC adapter main body, the design position of the inlet in the housing is limited by the circuit board, and the design freedom is inferior, and the circuit board is attached to the assembly position. Accordingly, since the assembly position of the inlet in the housing is determined, it is difficult to assemble the inlet at a fixed position of the housing, and it is difficult to ensure homogeneity during assembly.

  An object of the present invention is to provide an inlet device for an AC adapter that solves such problems in the background art.

  In order to solve the above-described problems, the present invention provides an AC adapter inlet device 1 having an inlet 2 to which an outlet L connected to the AC power source is attached and detached, and pin portions 4a and 4b to be attached to and detached from the outlet 2. Lead wires Wa, Wb are connected by connecting portions 5a, 5b bent from the rear ends of the pin portions 4a, 4b and at least crimping portions 6ax, 6bx extended from the rear ends of the connecting portions 5a, 5b. Holds at least two pin unit portions 3a and 3b integrally formed in a U-shape with possible lead connection portions 6a and 6b, and pin portions 4a and 4b press-fitted from the rear end surface 7r by an outsert, and leads to the outer surface An inlet 2 having an inlet base 7 formed with connecting portion arrangement surfaces 11a, 11b by notched surfaces for positioning the connecting portions 6a, 6b, and One ends Waf and Wbf of the lead wires Wa and Wb are connected to the connecting portions 6a and 6b by caulking portions 6ax and 6bx, and the other ends Was and Wbs of the lead wires Wa and Wb are connected to the built-in circuit 9 of the AC adapter main body 8. It is characterized by.

  In this case, according to a preferred aspect of the invention, the lead connection portions 6a and 6b can be connected to the lead wires Wa and Wb by the soldered portions 6ay. On the other hand, a restriction plate 12 that prevents the pin unit portions 3a and 3b from coming off can be fixed to the rear end surface 7r of the inlet base portion 7.

  According to the inlet device 1 for an AC adapter according to the present invention having such a configuration, the following remarkable effects can be obtained.

  (1) It is provided with an inlet 2 having a pin unit portion 3a ... having a lead connection portion 6a ... and an inlet base portion 7 into which the pin unit portion 3a ... is press-fitted, and lead wires Wa, Wb are caulked to the lead connection portion 6a ... 6ax... Are connected and the lead wires Wa and Wb are connected to the built-in circuit 9 of the AC adapter main body 8. Therefore, even if the outlet L is attached to or detached from the inlet 2, the internal circuit 9 (circuit board) and the inlet 2 are connected. No stress is applied to the internal circuit 9, and troubles such as poor contact between the built-in circuit 9 and the inlet 2 can be avoided.

  (2) Since the lead wires Wa and Wb are connected to the lead connecting portions 6a through the caulking portions 6ax and the lead wires Wa and Wb are connected to the built-in circuit 9 of the AC adapter main body 8, the inlet 2 of the housing The position is not affected by the built-in circuit 9 (circuit board). Therefore, the design position of the inlet 2 or the degree of freedom of design of the circuit board can be increased, the assembly of the inlet 2 to the housing is facilitated, and the assemblability and further the homogeneity at the time of assembly can be enhanced.

  (3) Since the connection portion arrangement surfaces 11a and 11b are formed on the outer surface of the inlet base portion 7 by the notch surfaces for positioning the lead connection portions 6a..., The lead connection portion 6a. This can be avoided and can contribute to further miniaturization and compactness of the AC adapter main body 8.

  (4) According to a preferred embodiment, in addition to the connection with the caulking portions 6ax to the lead wires Wa and Wb, if the lead connection portions 6a to be connected with the soldered portions 6ay are provided, the lead wires Wa and W Wb can be connected more reliably and firmly.

  (5) If the restriction plate 12 that prevents the pin unit portions 3a and 3b from coming off is fixed to the rear end surface 7r of the inlet base portion 7 according to a preferred embodiment, the outlet L may be repeatedly attached to and detached from the inlet 2 Even if it is attached or detached, it is possible to reliably prevent the pin unit portions 3a and 3b that are press-fitted into the inlet base portion 7 by outsert, thereby contributing to the improvement of the durability of the inlet 2.

  Next, the best embodiment according to the present invention will be given and described in detail with reference to the drawings.

  First, the structure of the inlet apparatus 1 which concerns on this embodiment is demonstrated with reference to FIGS.

  FIG. 2 shows an AC adapter 20 that includes the inlet device 1. The AC adapter 20 includes an AC adapter body 8, a DC output cord 21 derived from one end face 8 s in the longitudinal direction of the AC adapter body 8, and an AC input that is attached to and detached from the other end face 8 t in the longitudinal direction of the AC adapter body 8. A code 22 is provided. FIG. 2 shows only a part of the AC input cord 22, in particular, only the outlet L at one end. Therefore, the illustration of the power cord led out from the outlet L and the power plug at the other end of the power cord is omitted. This power plug is connected to an AC power source (power outlet). On the other hand, the AC adapter main body 8 is entirely covered with a housing 23, and a circuit board 24 constituting the built-in circuit 9 having an AC-DC conversion function is disposed inside the housing 23, and the AC adapter main body 8 according to the present embodiment. An inlet device 1 is disposed.

  The inlet device 1 includes an inlet 2, and the front surface of the inlet 2 is exposed to the outside through the other end surface 8t of the AC adapter main body 8, and the inlet 2 uses a pair of lead wires Wa and Wb to incorporate a built-in circuit 9 (circuit Connected to the substrate 24). The outlet L described above is attached to and detached from the inlet 2. Further, the inlet 2 includes a pair of pin unit portions 3a (3b), an inlet base portion 7 and a restriction plate 12 shown in FIG.

  The pin unit portion 3a includes a pin portion 4a to be attached to and detached from the outlet L, a connecting portion 5a extending at a right angle from the rear end of the pin portion 4a, and a right angle from the rear end (upper end) of the connecting portion 5a. The lead connecting portion 6a to which the lead wire Wa can be connected by the crimped caulking portion 6ax is integrally formed of a metal conductive material so that the whole becomes a U-shape. In this case, the pin portion 4a is formed in the shape of a hollow rod having a hollow inside, the tip is rounded, and a plurality of retaining protrusions are provided on the outer peripheral surface. The crimping portion 6ax includes a first crimping portion 6axp that clamps the core wire portion of the lead wire Wa and a second crimping portion 6axq that clamps the coating portion of the lead wire Wa. The first caulking portion 6axp also serves as a soldered portion 6ay that fixes (connects) the core wire portion of the lead wire Wa to the lead connecting portion 6a by soldering. Since the other pin unit portion 3b is the same as the pin unit portion 3a, two pin unit portions 3a... Are prepared, and one is used as the pin unit portion 3a and the other is used as the pin unit portion 3b. In the pin unit portion 3b, 4b is a pin portion, 5b is a connecting portion, and 6b is a lead connecting portion.

  The inlet base portion 7 is integrally formed into a rectangular parallelepiped shape by an insulating material such as a synthetic resin, and has a concave outlet attaching / detaching portion 31 having an open front surface, and a penetrating pin facing the inside of the outlet attaching / detaching portion 31 from the rear end surface 7r. Mounting holes 32a and 32b (FIG. 6) are provided. Therefore, the pin portions 4a and 4b of the pin unit portions 3a and 3b can be inserted (press-fitted) into the pin mounting holes 32a and 32b. On the other hand, mounting portions 33a and 33b having engagement slits 33as and 33bs formed by a pair of front and rear flange portions are provided on the front portions on both side surfaces of the inlet base portion 7. When the inlet 2 is assembled to the AC adapter main body 8, the mounting portions 33a and 33b can be engaged with the housing 23 and assembled. Further, on the outer surface of the inlet base portion 7, connection portion arrangement surfaces 11 a and 11 b are formed by notched surfaces for positioning the lead connection portions 6 a and 6 b. That is, as shown in FIGS. 4 and 6, the connecting portion arrangement surfaces 11 a and 11 b having a shape obtained by slicing the left and right end edges on the upper surface of the inlet base portion 7 to approximately 45 ° are moved from the rear end of the inlet base portion 7 to the front side. It is formed over a predetermined length. Furthermore, as shown in FIGS. 5 and 6, concave groove portions 34 a and 34 b for accommodating the connecting portions 5 a and 5 b are formed on the rear end surface 7 r of the inlet base portion 7. On the other hand, the restricting plate 12 is formed in a plate shape having a certain thickness by an insulating material such as a synthetic resin, and the shape and size thereof are matched with the rear end surface 7r of the inlet base 7.

  Next, an assembly method of the inlet device 1 according to the present embodiment will be described with reference to FIGS.

  First, the inlet 2 is assembled. First, the inlet base portion 7, the two pin unit portions 3a and 3b and the restriction plate 12 shown in FIG. 5 are prepared, and two lead wires Wa and Wb having a predetermined length with the core portions exposed at both ends are provided. prepare.

  Then, one end Waf of the lead wire Wa is connected to the lead connecting portion 6a of the pin unit portion 3a. In this case, the core wire portion of the lead wire Wa is accommodated in the first caulking portion 6axp of the lead connecting portion 6a, and the covering portion of the lead wire Wa is accommodated in the second caulking portion 6axq of the lead connecting portion 6a, and a predetermined caulking device. The caulking process is performed on the first caulking portion 6axp and the second caulking portion 6axq so that the core portion of the lead wire Wa is pinched by the first caulking portion 6axp and the lead wire Wa is covered by the second caulking portion 6axq. Squeeze out. Further, the soldered portion 6ay is provided by soldering the first caulking portion 6axp and the core wire portion of the lead wire Wa. In this way, if the lead wire Wa is connected by the soldered portion 6ay in addition to the connection by the crimping portions 6axp and 6axq, the lead wire Wa can be connected to the inlet 2 more reliably and firmly. Further, one end Wbf of the lead wire Wb is connected to the lead connecting portion 6b of the other pin unit portion 3b in the same manner as the lead connecting portion 6a described above.

  Next, the pin portions 4a and 4b of the pin unit portions 3a and 3b are inserted (press-fitted) into the pin mounting holes 32a and 32b provided in the inlet base portion 7 from the rear end surface 7r side. At this time, the connecting portions 5a and 5b of the pin unit portions 3a and 3b are respectively accommodated in the recessed groove portions 34a and 34b provided on the rear end surface 7r, and the lead connecting portions 6a and 6b are connected to the connecting portion arrangement surfaces 11a and 11b. Position each one. In this way, the lead connection portions 6a and 6b are positioned on the connection portion arrangement surfaces 11a and 11b by the cutout surfaces provided on the outer surface of the inlet base portion 7, so that the lead connection portions 6a and 6b are unnecessary from the outer surface of the inlet base portion 7. Protruding problems can be avoided, and the AC adapter main body 8 can be further reduced in size and size.

  Further, the restriction plate 12 is welded and fixed to the rear end surface 7r of the inlet base 7 by high frequency spot welding or the like. By fixing such a regulating plate 12 to the rear end surface 7r of the inlet base 7, even if the outlet L is repeatedly attached to or detached from the inlet 2 or forcibly attached or removed, it is press-fitted into the inlet base 7 by an outlet. It is possible to reliably prevent the pin unit portions 3a and 3b from coming off and contribute to improving the durability of the inlet 2. Thus, the inlet 2 shown in FIGS. 1 and 4 can be obtained.

  On the other hand, the assembled inlet 2 is assembled into the housing 23 of the AC adapter main body 8 as shown in FIG. In this case, since the opening 8o for mounting the inlet 2 is formed on the other end surface 8t in the longitudinal direction of the housing 23, the mounting portion 33a provided in the inlet 2 is formed at the edge of the opening 8o. 33b (engagement slits 33as, 33bs) is engaged. Since the housing 23 is a combination of upper and lower housing halves, the mounting portions 33a and 33b are mounted on one of the housing halves in advance. Further, the other ends Was and Wbs of the lead wires Wa and Wb led out from the inlet 2 are connected to predetermined positions of the circuit board 24 constituting the built-in circuit 9 of the AC adapter main body 8 by soldering as shown in FIG. . The inlet device 1 is configured through the above assembly.

  Therefore, according to such an inlet device 1 according to the present embodiment, it is provided with an inlet 2 having a pin unit portion 3a ... having a lead connection portion 6a ... and an inlet base portion 7 for press-fitting the pin unit portion 3a ... The lead wires Wa and Wb are connected to the lead connecting portions 6a through the crimping portions 6ax and the lead wires Wa and Wb are connected to the built-in circuit 9 of the AC adapter body 8 so that the outlet L is attached to and detached from the inlet 2. Even so, no stress is applied between the built-in circuit 9 (circuit board) and the inlet 2, and troubles such as poor contact between the built-in circuit 9 and the inlet 2 can be avoided. Further, the lead wires Wa, Wb are connected to the lead connecting portions 6a ... by the crimping portions 6ax ..., and the lead wires Wa, Wb are connected to the built-in circuit 9 of the AC adapter body 8, so that the position of the inlet 2 in the housing Is not affected by the built-in circuit 9 (circuit board). Therefore, the design position of the inlet 2 or the degree of freedom of design of the circuit board can be increased, the assembly of the inlet 2 to the housing is facilitated, and the assemblability and further the homogeneity at the time of assembly can be enhanced.

  As described above, the embodiment has been described in detail. However, the present invention is not limited to such an embodiment, and the detailed configuration, shape, material, quantity, and the like are within the scope not departing from the gist of the present invention. It can be changed, added, or deleted arbitrarily.

  For example, the inlet device 1 according to the modified embodiment shown in FIGS. 7 and 8 is also included in the present invention. FIGS. 7A and 7B respectively show a plan view and a rear view of the inlet device 1 in which the connection portion arrangement surfaces 11a and 11b are changed.

  7 are formed so that both side surfaces on the outer surface of the inlet base 7 are curved as shown in FIG. 7B, and the shape of the inlet base 7 in a rear view is an oval shape. It is a thing. The inlet device 1 shown in FIG. 7 has an advantage that the lead connecting portions 6a and 6b can be selected and arranged at arbitrary positions on both side surfaces of the inlet base portion 7 in accordance with the space state in which the inlet 2 is assembled.

  On the other hand, FIG. 8 shows the inlet device 1 in which the fixing method of the restriction plate 12 is changed. In FIG. 8, a plurality of guide pieces 41a, 41b, 41c, 41d having a L-shaped cross section are integrally formed on the rear end surface 7r of the inlet base 7, and the restricting plate 12 is attached to the guide pieces 41a from the direction of the arrow Fs. It is inserted by sliding. 7 and 8, the same parts as those in the embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals to clarify the configuration, and detailed description thereof is omitted.

FIG. 3 is a cross-sectional view taken along line AA in FIG. 3 in the inlet device according to the best embodiment of the present invention; A partial cross-sectional plan view of an AC adapter provided with the inlet device, A partial cross-sectional front view of the inlet device, A plan view of the inlet device, An exploded configuration diagram including a partial cross section of the inlet device, Rear view of the inlet base in the inlet device, The top view and rear view of an inlet device according to a modified embodiment of the present invention, The rear view of the inlet apparatus which concerns on other modified embodiment of this invention,

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1: Inlet apparatus, 2: Inlet, 3a: Pin unit part, 3b: Pin unit part, 4a: Pin part, 4b: Pin part, 5a: Connection part, 5b: Connection part, 6a: Lead connection part, 6b: Lead Connection portion, 6ax ...: crimping portion, 6ay ...: soldered portion, 7r: rear end surface, 7: inlet base, 8: AC adapter main body, 9: built-in circuit, 11a: connection portion arrangement surface, 11b: connection portion arrangement surface , 12: restriction plate, L: outlet, Wa: lead wire, Wb: lead wire, Waf: one end of lead wire, Wbf: one end of lead wire, Was: other end of lead wire, Wbs: other end of lead wire

Claims (3)

  An inlet device for an AC adapter having an inlet that is attached to and detached from an outlet connected to an AC power supply side, a pin portion that is attached to and detached from the outlet, a connecting portion that is bent from a rear end of the pin portion, and a rear end of the connecting portion At least two pin unit parts integrally formed in a U-shape with a lead connecting part that can be connected to the lead wire by at least a caulking part that is bent from the above, and the pin part that is press-fitted from the rear end surface by outsert And an inlet base having a connection portion arrangement surface formed by a notch surface for positioning the lead connection portion on the outer surface, and one end of the lead wire is connected to the lead connection portion by a caulking portion, and the lead Inlet device for AC adapter, characterized in that the other end of the wire is connected to a built-in circuit of the AC adapter main body   2. The inlet device for an AC adapter according to claim 1, wherein the lead connecting portion is connected by a soldered portion in addition to the connection by the caulking portion to the lead wire.   The inlet device for an AC adapter according to claim 1, wherein a restriction plate for preventing the pin unit portion from coming off is fixed to a rear end surface of the inlet base portion.

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