JP3137014B2 - External connection contact point structure of mobile phone and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone,
In particular, it relates to the structure of the external connection contact portion and a method of manufacturing the external connection contact portion.

[0002]

2. Description of the Related Art Generally, a portable telephone is used for charging by a charger and monitoring the installation state of an indoor unit.
A plurality of external connection contacts are exposed to the outside at the end of the housing case, and charging current is applied and the state of the mobile phone is monitored via these external connection contacts.

FIG. 10 shows an external connection contact portion structure of such a conventional portable telephone. A plurality of contact mounting grooves for mounting external connection contacts B formed by bending a thin metal plate are provided at an end of a housing case A. C are formed, and external connection contacts B are attached to these contact attachment grooves C in a state where the contact portions b are exposed to the outside. A printed wiring board D on which various functional elements are mounted is incorporated in the housing case A. Conventionally, the printed wiring board D is provided between the external connection contacts B and the conductor layer of the printed wiring board D. Each is connected by a lead wire E.

[0004]

However, according to such an external connection contact point structure of a conventional portable telephone,
For connection between the printed wiring board D and the external connection contact B,
Special lead wire E must be prepared and lead wire E
, The production cost of the mobile phone is relatively high.

In assembling the external connection contact portion structure, the external connection contacts B must be soldered one by one to the printed wiring board D. It is necessary to drop the contacts B into the contact mounting grooves C of the case A one by one and fix the external connection contacts B with a special tool. However, the work efficiency is degraded, which also causes the production cost to boil.

A first object of the present invention is to provide a printed wiring board incorporated in a housing case and a contact mounting groove in consideration of the current state of the external connection contact portion structure of a conventional portable telephone as described above. Between external connection contacts
An object is to obtain an inexpensive structure that does not require special components such as lead wires. A second object of the present invention is to simplify the assembling work,
An object of the present invention is to provide a method of manufacturing a mobile phone that can attach an external connection contact to a contact attachment groove of a housing case without using a special tool.

[0007]

In order to achieve the first object, the present invention relates to a state in which a printed circuit board on which a functional element is mounted is incorporated in a housing case, and a contact portion is exposed to the outside. Pre-fixed to the printed circuit board with solder
A plurality of external connection contacts having a lead portion
In the mobile phone to be mounted in a plurality of contact mounting grooves formed at the end of the case, each of the external connection contacts is bent in an “L” shape from the contact portion toward the inside of the housing case. The processed holding piece, the lead portion extending from the contact portion toward the printed wiring board, and fixed projections bent at a right angle from the tip of the lead portion, and these fixed projections are formed on the printed portion. The present invention proposes an external connection contact point structure of a mobile phone that is fixed by soldering while being inserted into a plurality of contact fixing holes formed in an end of a wiring board.

[0008] The second object mentioned above is according to the present invention.
The printed circuit board on which the functional element is mounted is incorporated into the housing case, and a plurality of contact mounting grooves formed at the end of the housing case are exposed to a plurality of contact mounting grooves. In a portable telephone in which external connection contacts are respectively attached and these external connection contacts are electrically coupled to the printed wiring board, a plurality of contact fixing holes are opened at an end of the printed wiring board, and a plurality of contact holes are formed from the contact portion. L "
A step of preparing an external connection contact having a holding piece bent into a letter shape, the lead portion extending from the contact portion toward the printed wiring board, and a fixing projection bent at a right angle from the tip of the lead portion. A contact mounting step of inserting these fixing protrusions into the contact fixing holes and fixing each external connection contact to the printed wiring board by soldering; and connecting the external connection contact fixed to the printed wiring board to the housing case. And assembling the printed wiring board into the housing case while inserting the printed wiring board into the corresponding contact mounting groove. In the following description of a preferred embodiment of the present invention, a step of punching a plurality of external connection contacts having the holding pieces, the lead portions, and the fixing projections into a single contact blank; While leaving the frame having the fractured choke portion at the connection portion with the contact, the contact blank is located on the end surface of the printed wiring board, and the fixing projections are set in the corresponding contact fixing holes at the end of the printed wiring board. After inserting into
A contact mounting step of fixing each external connection contact to the printed wiring board with solder, and after this contact mounting step, a breaking step of breaking the frame from the fractured choke portion,
An assembling step of inserting the printed wiring board into the housing case while inserting external connection contacts fixed to the printed wiring board into corresponding contact mounting grooves of the housing case. Explained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. 1 and 2 show the entirety of a mobile phone to which the present invention is applied. The housing of the mobile phone includes a housing case 1 formed of resin and a housing cover 2 for covering the rear surface of the housing case 1. The endless sealing rubber 3 interposed at the mating surface of the housing case 1 and the housing cover 2 prevents water from entering the inside.

That is, the housing case 1 and the housing cover 2
A printed wiring board 7 having a transmitting microphone 4, a receiving speaker 5, a liquid crystal display 6 for displaying a call state and a dial number mounted on the surface thereof is built in the space surrounded by. A plurality of button holes 1a in which a plurality of key tops 8 such as function buttons and dial buttons are respectively formed are formed on the surface of the housing case 1, and these key tops 8 correspond to the printed wiring board 7. It faces the contact part conductor 7a formed on the surface.

A large number of support claws 1b are integrally formed at the opening edge of the housing case 1 to be inserted into corresponding slots 3a of the endless seal rubber 3 which also serves as a non-slip rubber. The above-mentioned opening edge 2b of the housing cover 2 is pressed against the opposite end surface of the endless seal rubber 3 attached to the support claw 1b. The housing cover 2 is fixed to the housing case 1 by engaging an engaging hook 2c protrudingly formed at the opening edge 2b in a corresponding engaging groove 1c at the opening edge of the housing case 1. However, the housing cover 2 is securely fixed to the housing case 1 by the assembly screws 10 together with the battery cover 9 covering the lower part.

FIGS. 3 and 4 show the details of the external connection contact portion structure of the portable telephone according to the present invention. A plurality of contact mounting grooves 11 are arranged in the bottom wall 1d of the housing case 1 in the width direction thereof. The external connection contacts 12 are respectively mounted in the contact mounting grooves 11 formed and opened toward the housing cover 2 with the contact portions 12a exposed to the outside. That is, each of the external connection contacts 12 punched and bent from a thin metal plate includes a holding piece 12b bent into an “L” shape from the contact portion 12a toward the inside of the housing case 1; The lead portion 12c extending from the contact portion 12a toward the printed wiring board 7; and the fixing protrusion 1 bent at a right angle from the tip of the lead portion 12c.
2d.

That is, the holding piece 12 of each external connection contact 12
b is bent into the inside of the housing case 1 through the corresponding contact mounting groove 11 and comes into contact with the inner surface of the housing case 1, so that the contact portion 12 a protrudes more than necessary from the contact mounting groove 11. The end portion 12c of the endless seal rubber 3 passing through the inside of the contact mounting groove 11
Can reach the printed wiring board 7 by bypassing the portion 3b.

Further, a penetrating contact into which the fixing protrusion 12d of the corresponding external connection contact 12 can be inserted is provided at the end 7b of the printed wiring board 7 corresponding to the fixing protrusion 12d bent at a right angle from the lead portion 12c. A fixing hole 13 is formed, and a fixing protrusion 12 d is formed in these contact fixing holes 13.
Can be soldered. These contact fixing holes 13 aligned in a direction parallel to the contact mounting grooves 11 have the same arrangement pitch as the arrangement pitch of the contact mounting grooves 11. Therefore, the external connection contacts 1 corresponding to these contact fixing holes 13
2 are fixed by soldering, the external connection contacts 12 are in parallel with the contact mounting grooves 11 at the same arrangement pitch. Therefore, the printed wiring board 7 is fixed to the housing with fixing screws 14 (shown in FIGS. 2 and 3). By simply fixing the external connection contacts 12 to the body case 1, the external connection contacts 12 are located in the contact mounting grooves 11 of the housing case 1.

FIGS. 5 and 6 show a contact blank 12A used in the manufacturing method of the present invention. The contact blank 12A made of a thin metal plate has a contact blank 12A having the same pitch as the arrangement pitch of the contact mounting grooves 11. A plurality of positioning holes 15 are formed, and five external connection contacts 12 described above are punched at a constant pitch based on these positioning holes 15. Further, between the frame 16 of the contact blank 12A and each of the external connection contacts 12, a breaking choke portion 17 which is easily broken by bending the frame 16 is formed, and each of the external connection contacts is formed through the breaking choke portion 17. 12 is supported on the frame 16.

The structure of the external connection contact portion of the portable telephone according to the illustrated embodiment has the structure described above.
9 can be easily assembled by the steps shown in FIG. That is, as shown in FIG. 7, the fixing protrusions 12d of the plurality of external connection contacts 12 which are integrated with the frame 16 are inserted into the contact fixing holes 13 of the housing case 1, respectively, as shown in FIG. Then, the tip of each fixing protrusion 12 d protruding on the opposite side to the frame 16 may be fixed to the conductor layer of the printed wiring board 7 by soldering.

Thereafter, as shown in FIG. 8, when the frame 16 not soldered to the printed wiring board 7 is bent by about 90 as shown by a virtual line, each external connection contact 1
Since the breaking choke portion 17 connecting 2 is broken,
The external connection contacts 12 are separated from each other, and the electrical connection state is released. Since the fixing projections 12d are fixed to the printed wiring board 7 by soldering, the external connection contacts 12 after the soldering step maintain the alignment state before the frame 16 is folded, as shown in FIG. ,
Simply by dropping the printed wiring board 7 into the housing case 1, each external connection contact 12 is naturally attached to the corresponding contact mounting groove 11 of the housing case 1. Assembly can be completed only by completely fixing the case 1.

In the above description of the embodiment,
Although the example in which the plurality of external connection contacts 12 are processed into the contact blank 12A has been described, the present invention is not limited to this embodiment. For example, the guide means for the external connection contacts 12 is provided on the surface of the printed wiring board 7. Alternatively, a plurality of external connection contacts 12 manufactured independently of each other may be soldered independently from the beginning.

[0019]

As is apparent from the above description, according to the present invention, the external connection contacts are fixed to the printed wiring board by soldering, and these external connection contacts are formed on the housing case. Into the corresponding contact mounting groove
By omitting parts for electrically coupling the printed wiring board and the external connection contacts, the manufacturing cost can be reduced. Also, according to the manufacturing method of the present invention, after fixing the external connection contacts directly to the printed wiring board, the external connection contacts are attached to the contact mounting grooves in the step of fixing the printed wiring board to the housing case, so that skill is required. The assembly work can be performed efficiently without using any tools. In particular, in the manufacturing process using contact blanks, the external connection contacts can be fixed to the printed circuit board while maintaining the alignment of the processed external connection contacts, and these external connection contacts can be separated later, further improving work efficiency. There is an effect that can be done.

[Brief description of the drawings]

FIG. 1 is an overall exploded perspective view of a mobile phone according to the present invention.

FIG. 2 is an overall sectional view of the mobile phone.

FIG. 3 is an enlarged sectional view of an external connection contact portion of the mobile phone.

FIG. 4 is an enlarged exploded perspective view of an external connection contact portion of the mobile phone.

FIG. 5 is a plan view of a contact blank used in the mobile phone.

FIG. 6 is a sectional view of the contact blank taken along line 6-6 in FIG. 5;

FIG. 7 is an explanatory diagram of a contact mounting step showing a relationship between the contact blank and a printed wiring board.

FIG. 8 is an explanatory diagram of a soldering step showing a relationship between the contact blank and a printed wiring board.

FIG. 9 is an explanatory diagram of an assembling process showing a relationship between the printed wiring board and a housing case.

FIG. 10 is an enlarged exploded perspective view of an external connection contact portion of a conventional mobile phone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing case 1d Bottom wall 7 Printed wiring board 7b End part 11 Contact mounting groove 12 External connection contact 12a Contact part 12b Holding piece 12c Lead part 12d Fixing projection 12A Contact blank 13 Contact fixing hole 14 Fixing screw 16 Frame 17 Break choke part

Claims (3)

(57) [Claims] 1. A printed circuit board on which a functional element is mounted is incorporated into a housing case, and is fixed in advance to the printed circuit board by soldering with a contact portion exposed to the outside.
A plurality of external connection contacts having leads are connected to the housing case.
In the mobile phone to be mounted in a plurality of contact mounting grooves formed at the end of the terminal , each of the external connection contacts is bent into an “L” shape from the contact portion toward the inside of the housing case. A piece, the lead portion extending from the contact portion toward the printed wiring board, and fixed projections bent at a right angle from the tip of the lead portion, and these fixed projections are provided at ends of the printed wiring board. An external connection contact part structure for a mobile phone, wherein the external connection contact part structure is fixed by soldering while being inserted into a plurality of contact fixing holes formed in the part. 2. A printed wiring board on which a functional element is mounted is incorporated in a housing case, and a plurality of contact mounting grooves formed at an end of the housing case are exposed to the outside. A plurality of external connection contacts are attached to each other, and the external connection contacts are electrically coupled to the printed wiring board.A plurality of contact fixing holes are opened at an end of the printed wiring board, A holding piece bent from the contact portion into an “L” shape, the lead portion extending from the contact portion toward the printed wiring board, and an external portion having a fixing protrusion bent at a right angle from the tip of the lead portion. A step of preparing connection contacts; a step of inserting these fixing projections into the contact fixing holes and fixing each external connection contact to the printed wiring board with solder; Assembling the printed wiring board to the housing case while inserting the external connection contact fixed to the wiring board into the corresponding contact mounting groove of the housing case. . 3. A frame having a step of punching a plurality of external connection contacts having the holding piece, the lead portion, and the fixing projection into one contact blank, and a frame having a fractured choke portion at a connection portion with the external connection contacts. After leaving the contact blank on the end surface of the printed wiring board and inserting each fixing protrusion into the corresponding contact fixing hole at the end of the printed wiring board, each external connection contact is soldered. A contact mounting step of fixing the frame to the printed wiring board; a breaking step of breaking the frame from the broken choke portion after the contact mounting step; and an external connection contact fixed to the printed wiring board in the housing case. 3. The mobile phone according to claim 2, further comprising an assembling step of assembling the printed wiring board to the housing case while inserting the printed wiring board into the corresponding contact mounting groove. Manufacturing method.