JP5065002B2 - Charging stand - Google Patents

Description

  The present invention mainly relates to a charging stand for setting a battery built-in device such as a mobile phone and charging a built-in battery.

The charging stand includes positive and negative output terminal portions that are in contact with the power supply terminal of the battery built-in device to be set. When a metal comes into contact with the positive and negative output terminals and shorts, a large short current flows. In addition, when the voltage at the positive and negative output terminal portions is high, there is a possibility of electric shock when touched with wet hands. Even if the voltage is low, there is a risk of low temperature burns if contacted for a long time. In order to solve this problem, a charging stand having a built-in switch for separating the output terminal portion from the charging circuit has been developed in a state where the portable device is not attached (see Patent Documents 1 and 2).
Japanese Utility Model Publication No. 3-1645 JP 2003-348209 A

  The charging stand of patent document 1 is shown in FIG. This charging stand 80 has a case 81 with a seesaw-type charging terminal 83 built therein. In order to tilt the charging terminal 83, an elastic portion 84 that is elastically deformed is provided in a part of the case 81. On the other hand, the battery built-in device 90 set on the charging stand 80 is provided with a protrusion 92 that elastically deforms the elastic portion 84. In the charging stand 80, when the battery built-in device 90 is set, the elastic portion 84 is elastically deformed and the seesaw type charging terminal 83 is tilted. The charging terminal 83 that tilts is brought into contact with the power supply terminal 91 of the battery built-in device 90 at one end and the charging circuit of the substrate 85 at the other end. The charging stand 80 can be used safely by separating the seesaw type charging terminal 83 from the charging circuit of the substrate 85 without setting the battery built-in device 90. However, this structure has a drawback that a contact failure between the seesaw type charging terminal and the charging circuit of the substrate is likely to occur. In order to prevent poor contact, the use of a dedicated contact increases the manufacturing cost. Further, since the charging terminal is tilted in a seesaw manner, there is a drawback that the structure becomes complicated.

  Furthermore, the charging stand of Patent Document 2 incorporates a dedicated switch such as a limit switch and a micro switch that are separately produced as a switch that can be turned on and off by pressing a plunger. Although this structure can improve the reliability of the switch, there is a drawback in that the component cost is increased.

  The present invention has been developed for the purpose of solving the above drawbacks. An important object of the present invention is to provide a charging stand that can be made extremely simple and can be mass-produced at low cost while effectively preventing contact failure of the switch.

The charging stand of the present invention has the following configuration in order to achieve the above-described object.
The charging stand includes a case 11 having a mounting portion 12 for mounting a battery built-in device 30 containing a rechargeable battery so as to be detachable in a fitted state, and is provided in the case 11 and set in the mounting portion 12. The spring wire 13 having a terminal portion 13A that is brought into contact with the power supply terminal 31 of the battery built-in device 30 and the battery built-in device 30 set in the mounting portion 12 are pressed and switched on and off, and the spring wire 13 is connected to the charging circuit 20. And a switch 14 connected to. In the charging stand, when the battery built-in device 30 is set in the mounting portion 12, the switch 14 is turned on, and the spring wire 13 is connected to the charging circuit 20 to charge the battery of the battery built-in device 30. The spring wire 13 has an elastic coil portion 13C wound in a coil shape connected to the attachment portion 16 of the case 11, and a terminal portion 13A connected to the elastic coil portion 13C. The switch 14 includes a conductive elastic metal wire 17 connected to the charging circuit 20, and an insulating plug 18 that is pressed by the battery-equipped device 30 to press the elastic metal wire 17. The elastic metal wire 17 is elastically deformed to come into contact with the elastic coil portion 13 </ b> C of the spring wire 13 and has one end connected to the attachment portion 16 of the case 11. The insulating access tool 18 is disposed so as to freely enter and exit the mounting portion 12 of the case 11, and is pressed by the battery built-in device 30 set in the mounting portion 12 to press the elastic metal wire 17, thereby elastic coil of the spring wire 13. It is made to contact part 13C. In this charging stand, when the battery built-in device 30 is mounted on the mounting portion 12 of the case 11 and the insulating door 18 is pressed, the elastic metal wire 17 is elastically deformed, and the unevenness of the elastic coil portion 13C of the spring wire 13 is detected. , The switch 14 is switched to the on state, and the charging circuit 20 is connected to the spring line 13 via the elastic metal wire 17 of the switch 14 that is switched to the on state.

  The charging stand according to claim 2 of the present invention connects the elastic metal wire 17 to the mounting portion 16 of the case 11 via the coil spring portion 17B.

  In the charging stand according to claim 3 of the present invention, the switch 14 connects one spring wire 13 to the charging circuit 20.

  In the charging stand according to claim 4 of the present invention, the protruding portion 17C is provided at a portion where the elastic metal wire 17 is bent and connected to the insulating input / output tool 18. Guides inside.

The charging stand of the present invention has a feature that it can be mass-produced at low cost as an extremely simple structure while effectively preventing contact failure of the switch. That is, the charging stand of the present invention uses an elastic coil portion provided so as to elastically deform a spring wire connected to the power supply terminal of the battery built-in device as a contact point of the switch and also makes contact with the elastic coil portion. One end of the elastic metal wire is connected to the mounting portion of the case, and the elastic metal wire is placed in the mounting portion of the case so as to freely enter and exit and is pressed by the battery built-in device set in the mounting portion. This is because the switch is composed of an insulating tool that is brought into contact with the elastic coil portion. This switch is a device with a built-in battery that is set in the case mounting part. Touch the switch to turn on the switch. The elastic metal wire that is pressed against and contacts the elastic coil portion of the switch through the insulating access tool rubs the surface of the elastic coil portion every time it comes into contact, thereby eliminating the contact failure. Particularly, since the elastic coil portion is a portion that elastically deforms the spring wire, the elastic coil portion is deformed each time the terminal portion of the spring wire is pushed by the battery built-in device, and the contact portion with the elastic metal wire is relatively changed. Further, the fact that the elastic coil portion is wound in a coil shape and has irregularities also has an effect of preventing poor contact with the elastic metal wire. That is, the charging stand according to the present invention deforms the elastic metal wire by setting the battery built-in device, and also deforms the elastic coil portion that contacts the elastic metal wire, and further coiles the portion that the elastic metal wire contacts. By using the concave and convex shape, it is possible to effectively prevent poor contact and stably charge the battery of the battery built-in device.
In addition, since the elastic coil part of the spring wire is used as a contact point and an elastic metal wire is provided so as to be in contact with the elastic coil part, and this is deformed by the insulating entry / exit tool, the overall structure is greatly simplified. Realize the feature of mass production at low cost.

  The charging stand according to claim 2 of the present invention has a feature that the elastic metal wire can be smoothly elastically deformed because the elastic metal wire is connected to the mounting portion of the case via the coil spring portion.

  In the charging stand according to claim 3 of the present invention, since one spring wire is connected to the charging circuit via the switch, a short structure and a low temperature burn can be prevented as a simple structure in which the switch is provided only on one side.

  In the charging stand according to claim 4 of the present invention, the elastic metal wire is provided with a protruding portion at a portion where the elastic metal wire is bent and connected to the insulating input / output device, and the protruding portion is guided inside the insulating input / output device. Therefore, the elastic metal wire and the insulating tool can be reliably and stably connected.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment described below exemplifies a charging stand for embodying the technical idea of the present invention, and the present invention does not specify the charging stand as follows.

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The charging stand 10 shown in FIGS. 2 to 5 is mounted so that a battery built-in device 30 containing a rechargeable battery (not shown) is detachable, and charges the built-in battery. The battery built-in device 30 is a mobile phone. However, the present invention does not specify a battery built-in device for charging a built-in battery, and includes, for example, a secondary battery such as an MD or CD playback or recording / playback machine, a digital camera, a game machine, or a pack battery. It can be any battery built-in device.

  The charging stand 10 includes a plastic case 11 having a mounting portion 12 for mounting a battery built-in device 30 containing a rechargeable battery so that the battery built-in device 30 can be removed in a fitted state. The ring wire 13 made of a metal wire having a terminal portion 13A that is in contact with the power supply terminal 31 of the battery built-in device 30 to be set and the battery built-in device 30 set in the mounting portion 12 are turned on and off, And a switch 14 for connecting the spring wire 13 to the charging circuit 20.

  The case 11 shown in the figure has a mounting portion 12 on the upper surface. The mounting portion 12 is a recess provided on the upper surface of the case 11 and opening upward. The battery built-in device 30 is set in a fixed position by fitting into the mounting portion 12 of the recess. The mounting portion 12 in the figure has a shape in which the battery built-in device 30 is set in a landscape orientation.

  The charging stand 10 shown in the figure incorporates a circuit board 15 in a case 11. The circuit board 15 connects a pair of spring wires 13. The circuit board 15 is connected to the charging circuit 20 via a connector (not shown). The charging base 10 shown in the figure does not include the charging circuit 20 in the case 11, but can also include a charging circuit.

  The spring wire 13 is made of a conductive and elastic wire. The spring wire 13 is provided with a mountain-shaped terminal portion 13 </ b> A that protrudes from the mounting portion 12 of the case 11. A locking portion 13B that locks to the inner surface of the case 11 is provided at the tip of the mountain-shaped terminal portion 13A. The spring wire 13 contacts the locking portion 13B with the inner surface of the case 11, and specifies the protruding position of the terminal portion 13A. In other words, the terminal portion 13 </ b> A is projected from the mounting portion 12 of the case 11 in a state where the locking portion 13 </ b> B is in contact with the inner surface of the case 11. In order to make this terminal portion 13A elastically protrude from the mounting portion 12, the terminal portion 13A is connected to an elastic coil portion 13C wound in a coil shape, and the end of the elastic coil portion 13C is connected to the attachment portion 16 of the case 11. It is connected to a certain circuit board 15 by a method such as soldering. The spring wire 13 is connected to the circuit board 15 in such a posture that the center line of the elastic coil part 13C is parallel to the circuit board 15, and the elastic coil part 13C elastically protrudes the terminal part 13A to the mounting part 12. The charging base 10 shown in the figure has a pair of spring wires 13 fixed to the circuit board 15 so that the terminal portion 13A is positioned inside the elastic coil portion 13C and the mountain-shaped terminal portion 13A is on the same surface. ing.

  The charging stand 10 shown in the figure has the switch 14 in contact with only one spring wire 13. The charging stand 10 connects the pair of spring wires 13 to the charging circuit 20 with the switch 14 turned on, and supplies positive and negative voltages from the charging circuit 20 to charge the battery of the battery built-in device 30. In the state where the switch 14 is turned off, one spring line 13 is disconnected from the charging circuit 20. Therefore, in this state, even if it contacts the terminal portion 13A of the spring wire 13 protruding from the mounting portion 12, no short circuit occurs, and no electric current is applied even if a human body comes into contact, and low temperature burns can be prevented. Thus, the charging stand 10 that connects one spring wire 13 to the charging circuit 20 with the switch 14 can simplify the circuit configuration. However, although the charging stand of the present invention is not shown, both spring wires can be connected to the charging circuit via a switch having the same structure.

  The switch 14 uses the elastic coil portion 13C of the spring wire 13 as a contact. The switch 14 includes an elastic metal wire 17 that elastically deforms and comes into contact with the elastic coil portion 13 </ b> C of the spring wire 13, and an insulating tool 18 that elastically deforms the elastic metal wire 17.

  One end of the elastic metal wire 17 is connected to the circuit board 15 which is the attachment part 16 of the case 11 and is connected to the charging circuit 20 via the circuit board 15. The illustrated elastic metal wire 17 is produced by processing a conductive metal wire into a shape that connects the arm portion 17A contacting the elastic coil portion 13C to the coil spring portion 17B. This elastic metal wire 17 is connected to the charging circuit 20 via the circuit board 15 by fixing the terminal end of the coil spring part 17B to the circuit board 15 which is the mounting part 16 of the case 11 by a method such as soldering. Yes. In a state where the elastic metal wire 17 is not pushed down by the insulating entry / exit tool 18, the arm portion 17A is not brought into contact with the elastic coil portion 13C of the spring wire 13, and the arm portion 17A is pushed down by the insulation entry / exit tool 18 to make the elastic coil portion 13C. It fixes to the circuit board 15 so that it may contact.

  The illustrated elastic metal wire 17 is connected to the circuit board 15 in such a posture that the center line of the coil spring portion 17B is parallel to the center line of the elastic coil portion 13C of the spring wire 13. Further, the elastic metal wire 17 is coupled to the circuit board 15 in a posture that intersects the center line of the arm portion 17A with the center line of the elastic coil portion 13C, preferably in a posture that is perpendicular to the center line. The elastic metal wire 17 can reduce contact failure by bringing the arm portion 17A into contact with the wire of the elastic coil portion 13C in parallel. Further, since the elastic coil portion 13C is wound in a coil shape and has irregularities on the surface, the elastic metal wire 17 can be brought into contact with the irregularities to reduce contact failure.

  Further, the elastic metal wire 17 is provided with a protruding portion 17 </ b> C at a portion connected to the insulating access tool 18. The protruding portion 17 </ b> C is inserted into a concave portion 18 </ b> A provided inside the insulating access tool 18. The elastic metal wire 17 having this structure is connected to the insulating tool 18 so as not to be displaced. However, the elastic metal wire does not necessarily need to be provided with a protruding portion that is connected to the insulating entry / exit tool, and the insulating entry / exit tool is disposed above the arm portion of the elastic metal wire, and the arm portion is pushed by the insulating entry / exit tool and deformed. You can also. Although not shown, a slit-like groove for guiding the arm portion may be provided in the insulating tool, and the arm portion may be guided here.

  The insulating access tool 18 is disposed so as to freely enter and exit the mounting portion 12 of the case 11. The case 11 is provided with a through-hole 19 into which the insulating tool 18 is inserted, and the insulating tool 18 is guided here. The insulating access tool 18 is produced by molding a plastic into a mountain shape. Furthermore, the insulating tool 18 is provided with a stopper 18B extending in both sides at the lower end so that it is inserted into the through hole 19 of the case 11 and does not come out upward. Furthermore, the insulating tool 18 is provided with a recess 18A for guiding the protruding portion 17C of the elastic metal wire 17 therein. The projecting portion 17C of the elastic metal wire 17 is guided to the recess 18A, and the insulating tool 18 protrudes elastically from the mounting portion 12 by the elasticity of the elastic metal wire 17. Since this charging stand 10 elastically protrudes the insulating tool 18 to the mounting portion 12 of the case 11 with the elastic metal wire 17, a dedicated elastic body for elastically protruding the insulating tool 18 to the mounting portion 12 is provided. There is no need. However, although not shown in the figure, for example, it is possible to adopt a structure in which the insulating tool is elastically protruded from the mounting portion of the case via an elastic arm formed integrally with the case.

  The insulation tool 18 is formed into a shape that elastically deforms the elastic metal wire 17 and contacts the elastic coil portion 13 </ b> C of the spring wire 13 when it is pushed by the battery built-in device 30 set in the mounting portion 12. In particular, the arm part 17A of the elastic metal wire 17 is elastically deformed in a state in which the battery built-in device 30 is set in the mounting part 12, and is molded into a shape that is pressed against the elastic coil part 13C of the spring wire 13 with a predetermined pressure. The The insulating tool 18 has a shape that protrudes high from the mounting portion 12, and can strongly press the arm portion 17 </ b> A of the elastic metal wire 17 against the elastic coil portion 13 </ b> C of the spring wire 13. However, if the insulation tool is too high, the force pushed up by the reaction of pushing down the elastic metal wire becomes strong, and the battery built-in device is pushed up from the mounting portion. Therefore, the height of the insulating tool 18 is such that the arm portion 17A of the elastic metal wire 17 is pressed against the elastic coil portion 13C of the spring wire 13 with a pressure that does not cause poor contact, while the elastic metal wire 17 reacts with the battery built-in device. 30 is a height that cannot be pushed up from the mounting portion 12.

  In the charging base 10 described above, the mounting portion 16 of the case 11 connecting the spring wire 13 and the elastic metal wire 17 is used as the circuit board 15. That is, the spring wire 13 and the elastic metal wire 17 are arranged at fixed positions of the case 11 through the circuit board 15 that is the attachment portion 16. However, the spring wire and elastic metal wire can be provided by integrally forming the mounting part inside the case and directly connecting to the case, or by arranging members other than the case and the circuit board as the mounting part. It can also be arranged at a fixed position of the case via the mounting portion.

The above charging stand 10 is used in the following state.
(1) State in which battery-equipped device is not set on charging base In this state, the insulating door 18 is not pushed down by the battery-equipped device 30 as shown in FIG. In other words, the elastic metal wire 17 is set at a position where the insulating tool 18 protrudes from the mounting portion 12. The elastic metal wire 17 in this state does not bring the arm portion 17 </ b> A into contact with the elastic coil portion 13 </ b> C of the spring wire 13. Therefore, the switch 14 having the elastic metal wire 17 and the elastic coil portion 13C as a contact is turned off. The switch 14 in the off state separates one spring wire 13, that is, the terminal portion 13 </ b> A from the charging circuit 20. Therefore, even if a metal contacts the pair of terminal portions 13A protruding from the mounting portion 12 of the case 11 in this state, there is no short circuit. Further, even if a human body comes into contact with the pair of terminal portions 13A, current is not supplied and low temperature burns are not caused.

(2) State in which battery built-in device is set on charging base As shown in FIG. 5, the battery built-in device 30 set in the mounting portion 12 pushes down the insulating access tool 18. The insulating entry / exit tool 18 to be pushed down pushes down the arm portion 17A of the elastic metal wire 17 so as to contact the unevenness of the elastic coil portion 13C of the spring wire 13. In this state, the switch 14 is turned on. The switch 14 in the on state connects the spring wire 13 to the charging circuit 20 via the elastic metal wire 17. Accordingly, the pair of terminal portions 13 </ b> A are connected to the charging circuit 20 to charge the battery of the battery built-in device 30.

It is sectional drawing of the conventional charging stand. It is a perspective view of the charging stand concerning one Example of this invention. It is a cross-sectional perspective view which shows the internal structure of the charging stand shown in FIG. It is a vertical longitudinal cross-sectional view of the charging stand shown in FIG. It is sectional drawing which shows the state which set the battery built-in apparatus to the charging stand shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Charging stand 11 ... Case 12 ... Mounting part 13 ... Spring wire 13A ... Terminal part
13B ... Locking part
13C ... Elastic coil part 14 ... Switch 15 ... Circuit board 16 ... Mounting part 17 ... Elastic metal wire 17A ... Arm part
17B ... Coil spring part
17C ... Projection 18 ... Insulation tool 18A ... Recess
18B ... Stopper 19 ... Through hole 20 ... Charging circuit 30 ... Battery built-in device 31 ... Power supply terminal 80 ... Charging stand 81 ... Case 83 ... Charge terminal 84 ... Elastic part 85 ... Substrate 90 ... Battery built-in device 91 ... Power supply terminal 92 ... Protrusion

Claims (4)

A case (11) having a mounting part (12) for mounting a battery built-in device (30) containing a rechargeable battery so that it can be removed in a fitted state, and a mounting part (12) provided in the case (11) 12) A spring wire (13) having a terminal portion (13A) to be in contact with a power supply terminal (31) of a battery built-in device (30) set in 12), and a battery built-in device set in the mounting portion (12) ( 30) and a switch (14) that is turned on and off to connect the spring wire (13) to the charging circuit (20), and the battery-equipped device (30) is set in the mounting portion (12). Then, the switch (14) is turned on and the spring wire (13) is connected to the charging circuit (20) to charge the battery of the battery built-in device (30).
The spring wire (13) is a coiled elastic coil part (13C) connected to the attachment part (16) of the case (11), and a terminal part connected to the elastic coil part (13C). (13A)
The switch (14) is elastically deformed to contact the elastic coil portion (13C) of the spring wire (13), and has one end connected to the mounting portion (16) of the case (11), and The conductive elastic metal wire (17) connected to the charging circuit (20) and the mounting portion (12) of the case (11) are detachably disposed and set in the mounting portion (12). Insulated access tool (18) that is pressed by the battery built-in device (30) and presses the elastic metal wire (17) to contact the elastic coil portion (13C) of the spring wire (13),
When the battery built-in device (30) is mounted on the mounting portion (12) of the case (11) and the insulating access tool (18) is pressed, the elastic metal wire (17) is elastically deformed and the spring wire (13 ) Of the elastic coil portion (13C) of the switch (14) is turned on, and the charging circuit (20) is connected via the elastic metal wire (17) of the switch (14) which is turned on. A charging stand connected to the spring wire (13).   The charging stand according to claim 1, wherein the elastic metal wire (17) is connected to a mounting portion (16) of the case (11) via a coil spring portion (17B).   The charging stand according to claim 1, wherein the switch (14) connects one spring wire (13) to the charging circuit (20).   The elastic metal wire (17) is provided with a protrusion (17C) at a portion where it is bent and connected to the insulating access tool (18), and this protrusion (17C) is provided on the insulating access tool (18). The charging stand according to claim 1, which is guided inward.

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