JP2005168105A - Terminal structure of charger for electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal structure of a charger for electronic equipment wherein a pushing force required for setting electronic equipment and an amount of high-temperature resin for use are reduced. <P>SOLUTION: The charger for electronic equipment is provided on the electronic equipment setting area of its case with openings for a charger-side terminal protrusion and an opening for a push button protrusion. A board mounting base member is disposed in the charger case with a fulcrum shaft provided substantially in the center of the board mounting base member taken as the center of see-saw rotation. Charger-side terminals are provided in proximity to one end of the board mounting base member so that the terminals face the openings for the charger-side terminal protrusion. A push button is provided in proximity to the other end so that the push button faces the opening for the push button protrusion. The board mounting base member is urged by a spring so that, when the electronic equipment is not set, the charger-side terminals are housed in the charger case. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a terminal structure of a charger for electronic equipment such as a mobile phone.

In chargers for various electronic devices such as mobile phones, terminals are housed in the case when not used for charging, and a terminal raising mechanism is provided to connect the terminals on the electronic device side and the charger side terminals when charging. ing.
In order to operate this terminal raising mechanism, the charger side terminal that protrudes from the charger case and the push button that is pushed in by attaching the mobile phone etc. to the charger are provided so far when the mobile phone is set. The charger side terminal was projected using the pushing action of the push button.
For example, FIG. 7A shows a cross-sectional view of a charger having a conventional structure, and FIG. 7B shows a state in which a mobile phone is mounted.
In the charger 110, when the mobile phone is not attached, the push button 132 is spring-biased by a spring 137 through the arm 138 so that the push button 132 protrudes from the opening.
When the mobile phone shown in FIG. 7A is not attached, the charger side terminal 133 is connected to the charger side terminal 133 with the end 138a of the arm 138 moving to the side of the charger side terminal 133. The spring 137 is biased by a spring 137 so that the portion 133 is pressed and the charger side terminal 133 is accommodated in the charger case 120.
As shown in FIG. 7B, when the cellular phone 101 is mounted on the charger, the push button 132 is pushed, the end 138a of the arm 138 moves, and the charger side terminal 133 is released to open the charger. The charger side terminal 133 protrudes from the portion 123 and is electrically connected to the mobile phone side terminal 103.
Therefore, the spring 137 is a strong spring that adds a force for pressing the torsion spring 135 and a force for projecting the push button 132 to accommodate the charger side terminal when the mobile phone is not attached. It was.
For this reason, when the push button is pushed in with the mobile phone, the mobile phone is pushed in against the force of a strong spring, and the push force is increased.
In Japanese Patent Application No. 2003-344613, the applicant moves the rod by pushing the swing button with a mobile phone, swings the swivel arm with this rod, and self-cleans the charging terminal to rub the charging terminal of the mobile phone. Although a technology for projecting while operating has been filed, this technology also uses two springs: a spring for projecting the charging terminal and a spring attached to the rod for projecting the swing button.
In addition, along with improvements in the functions of mobile phones, it is now possible to connect not only charging connectors but also USB (Universal Serial Bus) connectors in the charger, so the amount of components and wiring on the board inside the charger The calorific value is also increasing.
In addition, when signal terminals are added in addition to charging terminals, the overall terminal connection force increases accordingly, and the strength of the terminal support member that can withstand this, particularly high heat resistance against heat generation during charging. Strength has been demanded.

Japanese Patent Application No. 2003-344613

  In view of the above technical problem, an object of the present invention is to provide a charger terminal structure for an electronic device that reduces the pushing force required when the electronic device is mounted and reduces the amount of heat-resistant resin used.

  The technical gist of the present invention is an electronic device charger, wherein an electronic device mounting portion of a charger case includes a charger side terminal protruding opening and a push button protruding opening, and is an abbreviation of a board mounting base member. The board mounting base member is disposed in the charger case with a fulcrum shaft provided at the center as a center of rotation of the seesaw, and the charger side terminal is disposed near one end of the board mounting base member. A charger side terminal is arranged so as to face the opening for protrusion, and a push button is arranged near the other end so as to face the opening for pushing button. When the electronic device is not attached, the charger side The board mounting base member is spring-biased so that the terminal is housed in the charger case.

In this way, a charger side terminal such as a charging terminal or a signal terminal is connected to the push button whose upper end protrudes from the opening of the charger case to the outside via the board mounting base member, and the contact of this charger side terminal When the electronic device is not installed in the charger, the contact portion of the charger side terminal can be stored in the charger case, and the electronic device is placed in the charger case. For the first time, the push button is pressed in the case of the electronic device.
Taking a mobile phone as an example of the electronic device, when the mobile phone is mounted on the mobile phone mounting portion of the charger, the push button is pressed by the mobile phone.
Although the push button is provided at one end of the board mounting base member, the board mounting base member is mounted in the case so that the seesaw can be swung with the fulcrum shaft as a fulcrum, and the position of the push button is opposite to the fulcrum shaft. Since the charger side terminal is provided on the side, the charger side terminal protrudes in the reverse direction as the push button is pushed.

The charger side terminal may be attached through an elastic body such as a torsion spring in terms of connectivity. In this way, the charger side terminal and the push button are provided on both sides of the fulcrum shaft portion of the board mounting base member, and the fulcrum shaft portion is arranged near the center position of the push button and the charger side terminal. Thus, the protruding state and the storage state can be easily switched like a seesaw.
The position of the fulcrum shaft portion can minimize the spring force that biases the board mounting base member when the push button side of the board mounting base member and the charger side terminal side are balanced, but the spring force is appropriate. If so, there is no need to balance.
When the electronic device is not installed, the charger side terminal is housed in the case opening, but the push button side is for the purpose of rotating the board mounting base member to the seesaw. There is no need to be housed in.
Further, although the fulcrum shaft portion is constituted by a protrusion, a shaft and a bearing, the protrusion, the shaft and the bearing may be provided on either side of the board mounting base member or the charger case.
Here, the board mounting base member accommodates the charger-side terminal and is spring-biased with the fulcrum shaft portion as an axis so as to project the push button.
Then, the push button is provided at a position corresponding to the mobile phone case when the mobile phone is mounted on the mobile phone mounting portion, so that the push button is pushed into the push button opening when the mobile phone is mounted.
On the other hand, when the mobile phone is mounted on the mobile phone mounting part, the charger side terminal is pushed down and the push button side of the board mounting base member is lowered, and the charger side terminal is raised, so the charger side terminal opening It protrudes from the part.
For example, in a charger for a mobile phone, the charger side terminal such as the charging terminal and the signal terminal is provided at a position corresponding to the power receiving terminal and the signal terminal of the mobile phone that is the electronic device side terminal. When the mobile phone is mounted, the charger side terminal and the mobile phone side terminal come into contact with each other and become conductive.

In the invention according to claim 5, a hook-like hook portion is provided on the charger case side so as to contact the side portion of the electronic device, the electronic device faces the electronic device mounting portion of the charger case, and When the electronic device is pushed in the mounting direction, the electronic device side terminal is rubbed by the charger side terminal by sliding in the lateral direction so that the electronic device is pushed by the hook-shaped hook.
The hook-shaped hook portion of the hook is formed in the direction of the terminal of the mobile phone, and the length thereof is the side of the charger in which the mobile phone side terminal protrudes by the shifting operation when the mobile phone is shifted and locked. It is long enough to rub with the terminal.
Specifically, the length may be about one third of the length of the mobile phone side terminal.
When the cellular phone is removed, the push button protrudes by the spring force, and the charger side terminal is stored.
Thus, the push button is projected when the mobile phone is not attached, and the board mounting base member is urged by one torsion spring so as to accommodate the charger side terminal.
The spring for applying the elastic force for rotating and returning the board mounting base member is only this one torsion spring, and this spring only urges the board mounting base member supported by the shaft to a certain position. Only weak power is needed.
Therefore, the pushing operation of the pushing button can be performed with a very small pushing force, and the initial operation load when the mobile phone is mounted can be reduced.

Even if heat is generated in the circuit board, it is difficult for heat to be transferred from the board mounting base member to the charger case, and the charger side terminal is mounted on the board mounting base, so if only the board mounting base member is made heat resistant Well, the charger case is no longer required for heat resistance, and can be handled with inexpensive grade resin.
By forming the charger side terminal and the push button portion on the board mounting base member in this way, the board mounting base portion can be unitized, so that it can be designed independently from the case side.
Accordingly, it is possible to cope with the heat generated by using only the board mounting base member with the charging terminal mounted as a heat resistant resin.

  When wiring between the circuit board provided on the board mounting base member and the wiring on the charger case side with a flexible wiring member such as FFC (Flexible Flat Cable) or FPC (Flexible Printed Circit or Flexible Printed Cable), the board Even if the mounting base member repeatedly swings, disconnection due to repeated bending load between the circuit board of the board mounting base member and the wiring attached to the charger case can be prevented.

In the present invention, the seesaw structure is adopted, and the charger side terminal provided at the other end protrudes in response to the depression operation of the push button provided at one end of the board mounting base member serving as the seesaw. Therefore, the initial operating load of the push button has become very small.
In addition, the fact that the charger side terminal can be protruded and stored with one spring bias also contributes to the reduction of the initial operating load.
In this arrangement, if the fulcrum shaft portion is arranged near the center position of the charger side terminal and the push button of the board mounting base member, or if the weight is balanced between the charger side terminal side and the push button side, the spring force is further increased. Can weaken.

Since the initial operating load has been reduced, the strength of the lock part required when attaching the electronic device to the charger can also be reduced, and the hook part that constitutes the lock part can slide laterally when the electronic device is attached. Then, a self-cleaning amount can be secured.
Moreover, the structure is simple.

In a conventional charger having two charging terminals, it is only necessary to secure the strength on the terminal support side such as a charger case so that it can withstand about twice the connection force required for one terminal connection.
However, a signal terminal is added in addition to the charging terminal. For example, when three signal terminals are added, the terminal support side strength sufficient to withstand a total of five terminal connections in combination with the charging terminal is required. It becomes like this.
Therefore, when the terminal is supported by the resin case of the charger in such a case, the strength is reduced due to the heat generated during charging, and deformation may occur. Since this terminal is attached to the board mounting base member, it is only necessary to design the board mounting base member so as to ensure heat resistance, and heat is not conducted directly to the charger case. The degree of design freedom for is increased.

A mobile phone charger will be described as an example to which the electronic device charger terminal structure according to the present invention is applied.
1A is a perspective view of a mobile phone charger, and FIG. 1B is a cross-sectional view taken along line AA.
A board mounting base member 30 is mounted in the charger case 20 of the charger 10, and a fulcrum shaft part 31 is provided on the board mounting base member 30, and the fulcrum shaft part 31 is pivotally supported on a side surface inside the case 20. Thus, the board mounting base member 30 is swingably mounted like a seesaw with the fulcrum shaft portion 31 as an axis.
The board mounting base member 30 is formed of a heat resistant resin, and the circuit board 36 is mounted.
Further, in the charger case 20, a connector base portion 40 provided with connection connectors 41 and 42 and a hook 25 for locking the cellular phone are housed, and a hook portion 25a is formed on the hook 25.
FIG. 2 (a) shows a layout of these board mounting base member, connector base portion, and hook as viewed from the side, and FIG. 2 (b) shows a perspective view thereof.
The state where the circuit board is taken out is shown in the lower part of FIG.
A push button 32 is disposed near one end with the fulcrum shaft portion 31 of the board mounting base member 30 as the center of rotation.
The push button 32 is disposed in contact with a protrusion 30a provided on the board mounting base member 30 as shown in the cross-sectional view of FIG.
Charger side terminals 33 and 34 are provided on the opposite side of the push button 32 with the fulcrum shaft portion 31 of the board mounting base member 30 as the rotation center.
The charger-side terminal is attached to the circuit board 36 via a torsion spring 35 with solder or the like, and includes a charging terminal 33 and a signal terminal 34.
The connector base portion 40 is provided with a connection connector (USB connector) 41 and a connection connector 42, and a hook 25 is disposed above the connector.
The hook flange 25a protrudes outward from the hook opening 24 on the case side.
In FIG. 1 (a) and FIG. 1 (b), a push button protruding opening is provided at a position corresponding to the push button 32 of the mobile phone mounting portion (electronic device mounting portion) 21 for mounting the mobile phone on the upper surface of the case for charging. A portion 22 is provided, and a charger side terminal protruding opening 23 is provided at a position corresponding to the charger side terminals 33 and 34.
As a result, when the board mounting base member 30 is swung with the fulcrum shaft 31 as a fulcrum, if one of the push button 32 and the charger side terminals 33 and 34 protrudes outside the opening, the other is stored in the case. Operates on.

As shown in FIGS. 1B and 2, a torsion spring 37 is attached to the board attachment base member 30, and the charger side terminals 33 and 34 are accommodated in the case 20 when the mobile phone is not attached. The mounting base member is biased by a spring.
In FIG. 2B, the torsion spring 37 is shown as a perspective view for easy understanding.
When the cellular phone is mounted, the push button 32 protruding from the cellular phone is pushed into the opening 22, and accordingly, the charger side terminals 33 and 34 project toward the cellular phone side terminal, and contact points at the tips thereof. The parts 33a and 34a abut.
Thus, when the mobile phone is not attached, the contact portion of the charger side terminal is accommodated in the charger case.
The operation of the charger side terminal accompanying the mounting of the mobile phone on the charger will be described with reference to an enlarged cross-sectional view of the main part shown in FIG.
The figure is simplified for clarity, and the fulcrum shaft is shown as a perspective view.
FIG. 3A shows a state before the mobile phone is mounted, FIG. 3B shows a state in which the mobile phone has been mounted, and FIG. 3C shows a state in which the mobile phone has been mounted.
As shown in FIG. 3 (a), the push button 32 is provided at one end of the board mounting base member 30, and the charger side terminal 33 is disposed on the opposite side with the fulcrum shaft portion 31 of the board mounting base member 30 as the rotation center. 34 is provided.
The cellular phone 1 is pushed toward the cellular phone mounting portion 21 after positioning the convex portion 2 a over the claw portion 26 of the charger 10.
FIG. 3B shows a progressing state in which the push button 32 is pushed by the mobile phone 1.
The mobile phone 1 is positioned by placing the convex portion 2a on the claw portion 26 of the charger, and the push button 32 is pushed in by the case 2 of the mobile phone.
With this push-in, the board mounting base member 30 rotates and the charger side terminals 33 and 34 rise and project toward the mobile phone side terminal 3 from the charger side terminal opening 23.
The initial operation load for pushing the push button 32 and raising the charger side terminal 33 is caused by rotating the board mounting base member 30 around a fulcrum shaft portion 31 provided at a substantially central position in the longitudinal direction. Since only the projection 33 is projected, a force sufficient to resist the torsion spring 37 is sufficient, and the formation is very light.
In the example shown in FIG. 3, the spring that gives the rotation restoring force to the board mounting base member extends to the inner lower surface 20 a side of the charger case 20, and is elastic between the charger case inner lower surface 20 a and the board mounting base member 30. However, it may be extended to the charger case inner upper surface 20b side to give an elastic force between the charger inner upper surface 20b and the board mounting base member 30. A structure may be employed in which a spring is attached to this shaft by being fitted in a hole provided in the substrate mounting base member.
Since the charger side terminal 33 is provided at a position corresponding to the mobile phone side terminal 3, it is intended to attach the mobile phone to the charger as shown in the enlarged view of the vicinity of the charger side terminal in FIG. When the push button is pressed, the contact portion 33a of the charger side terminal 33 comes into contact with the mobile phone side terminal 3.
From this state, the cellular phone 1 is shifted to the claw portion 26 side of the charger 10 while the push button is pushed.
As a result, as shown in FIG. 6, the recess 2b of the mobile phone 1 is locked to the hook collar 25a.
FIG. 4B shows an enlarged view of the mobile phone 1 shifted to the claw portion 26 side in order to lock the recess 2b to the hook collar 25a.
In FIG. 4, the shift is greatly drawn so that the shift of the terminal on the mobile phone side can be easily understood.
In order to lock the hook collar, the cellular phone 1 is shifted from the state shown in FIG. 4 (B), which is the state before the cellular phone 1 is displaced, to the concave portion of the cellular phone as shown in FIG. 4 (B). The hook collar will be locked.
At this time, since the contact portions 33a and 34a of the charger side terminals 33 and 34 are pressed against the mobile phone side terminal 3 by the spring bias, the mobile phone side terminal 3 has a length t by the contact portions 33a and 34a. The self-cleaning that moves while being rubbed is performed.
By this self-cleaning, contact failure due to contamination of the surface of the mobile phone side terminal 3 and the contact portions 33a, 34a of the charger side terminals 33, 34 and formation of an insulating film is prevented.
Self-cleaning is performed while pushing the push button with a mobile phone, but since the initial operating load for pushing the push button is very light, self-cleaning can be performed with a light force.
In FIG. 6, the hook flange 25a is formed in the direction of the terminal 3 on the side of the mobile phone to be mounted, and the length thereof is such that when the mobile phone is shifted and locked, the mobile phone side terminal 3 is moved by this shifting operation. The charger-side terminals 33a and 34a in the protruding state are rubbed sufficiently, and the charger-side terminals 33a and 34a are long enough not to interfere with the case portion of the mobile phone.
When the mobile phone is attached to the charger locked on the hook, the state shown in FIGS. 4 (a) and 3 (c) is obtained.
When the cellular phone is removed from the state of FIG. 3C, the board mounting base member 30 is rotated by the force of the torsion spring 37, the push button 32 protrudes, and the charger side terminals 33 and 34 are accommodated. ) To return to the state before the mobile phone was installed.
Thus, the charger side terminal and the push button are provided on both sides of the board mounting base member, and have a simple structure in which the protruding state and the storing state are alternately switched like a seesaw with respect to the opening. .
And, since the positioning of the charger side terminal and the push button when the mobile phone is not attached is performed with a single spring, with the center position as the axis, the push button is pushed. The force required to do this can be very light, and with this, the strength required for the movable part of the charger can be reduced, and the cost can be reduced.

FIG. 5A shows the arrangement of the board mounting base member, the connector base portion, and the hook as viewed from above, and FIG. 5B shows the arrangement as viewed from below.
A circuit board 36 is attached to the board attachment base member 30, and heat is generated by energizing the circuit.
Therefore, although the board mounting base member 30 is formed of a heat resistant resin, the circuit board 36 that generates heat is provided on the board mounting base member 30, and the board mounting base member 30 and the charger case are mounted via the fulcrum shaft portion 31. Therefore, the heat of the circuit board 36 is not directly transmitted to the charger case, and the charger case does not need to be heat resistant.
Thus, it is not necessary to use expensive heat-resistant resin for the charger case, so that there is an effect of cost reduction.
Also, the wiring between the circuit board 36 provided on the board mounting base member and the wiring provided on the connector base 40 on the charger case side is connected by the FFC 43.
For this reason, the board mounting base member 30 is repeatedly swung for charging the mobile phone, and a bending load is repeatedly applied to the wiring between the circuit board 36 of the board mounting base member 30 and the wiring of the connector base portion 40. However, disconnection is prevented.

(A) The external appearance perspective view of the charger for portable telephones which applied the charger terminal structure concerning this invention is shown. (B) AA line sectional view is shown. (A) The side view of arrangement | positioning of a board | substrate mounting base member, a hook part, and a connector base part is shown. (B) The perspective view of arrangement | positioning of a board | substrate mounting base member, a hook part, and a connector base part is shown. The main part transparent view showing the operation of the charger side terminal when the mobile phone is attached to the charger, (a) is the state before the mobile phone is attached, (b) is the progress state of the attachment of the mobile phone ( C) shows a state where the mobile phone is completely attached. (A) shows the state before the mobile phone is shifted in the enlarged view near the charger side terminal, and (B) shows the state in which the mobile phone is shifted in the enlarged view near the charger side terminal. (A) The top view of arrangement | positioning of a board | substrate mounting base member, a hook part, and a connector base part is shown. (B) A bottom view of the arrangement of the board mounting base member, the hook portion, and the connector base portion is shown. Sectional drawing of a mobile telephone wearing state is shown. (A) An example of a conventional charger is shown. (B) A state where a mobile phone is mounted on a conventional charger.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 2 Mobile phone case 2a Mobile phone convex part 2b Mobile phone concave part 3 Mobile phone side terminal 10 Charger for mobile phone (charger for electronic equipment)
20 Charger case 20a Charger case inner lower surface 20b Charger case inner upper surface 21 Charger case mobile phone mounting part (charger case electronic device mounting part)
22 Push-button projecting opening 23 Charger-side terminal projecting opening 24 Hook opening 25 Hook 25a Hook collar 26 Claw 30 Substrate mounting base member 30a Substrate mounting base member pressing button abutting projection 31 Support shaft Part 32 Push button 33 Charger side terminal (charging terminal)
33a Charger side terminal contact part 34 Charger side terminal (signal terminal)
34a Charger-side terminal contact portion 35 Charger-side terminal torsion spring 36 Circuit board 37 Torsion spring 40 Connector base member 41 Connection connector 42 Connection connector (USB)
43 FFC

Claims (5)

  In the electronic device charger, the electronic device mounting portion of the charger case is provided with a charger side terminal protruding opening and a push button protruding opening, and a fulcrum shaft provided at a substantially central portion of the board mounting base member The board mounting base member is arranged in the charger case with the center of the seesaw rotation as the center, and near the one end of the board mounting base member so as to face the charger side terminal protruding opening. A charger side terminal is arranged, and a push button is arranged near the other end so as to face the opening for pushing the push button. When the electronic device is not installed, the charger side terminal is stored in the charger case. Thus, the terminal structure of the charger is characterized in that the board mounting base member is spring-biased.   2. The terminal structure of a charger according to claim 1, wherein the board mounting base member is made of a heat resistant resin.   The terminal structure of the charger according to claim 1 or 2, wherein a wiring connection is made between the electronic board attached to the board attachment base member and the charger case side by a flexible wiring member.   The charger terminal structure according to any one of claims 1 to 3, wherein the charger terminal includes a charging terminal and a signal terminal.   A hook-like hook portion is provided on the charger case side so as to abut on the side portion of the electronic device, and the electronic device side terminal is rubbed with the charger side terminal by sliding the electronic device laterally. The terminal structure of the charger according to claim 1, wherein

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