JPH0719099Y2 - Electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an electronic device such as a thin radio receiver, and more particularly to an electronic device having an external connection jack such as an earphone jack. .

[Conventional technology]

In general, portable radio receivers are designed to obtain acoustic output from earphones in consideration of their usage environment, battery capacity, etc., and a plug / jack is used to connect the earphones to the receiver body. ing. The plugs and jacks are provided as individual parts whose shapes and dimensions are standardized.

In addition, with the development of semiconductor technology and the like, miniaturization and thinning of portable electronic devices have been promoted, and for example, in radio receivers, ultra-thin so-called card radios with a thickness of about several millimeters have already been marketed. ing. Further, in this ultra-thin type radio receiver, in order to secure the thin shape, as shown in FIG. 7, the ground contact 3, the core contacts 4, 5 are provided on the side surface of the case 2 of the receiver main body 1. A connector 7 is provided so as to be exposed and a guide groove 6 is formed in the case 2, and the ground contact 3 on the receiver body 1 side is provided.
Earphone-side connector having a structure in which a ridge 9 which is slidably fitted in the guide groove 6 on the receiver body 1 side is formed in a connector housing 8 in which a contact spring (not shown) arranged to be in contact with the core contacts 4 and 5 is provided. 10 is attached to the connector 7 on the receiver body 1 side.

[Problems to be solved by the invention]

As mentioned above, the ultra-thin type radio receiver uses a connector with a special structure to secure its thin shape, so it is possible to use widely-provided earphones with a plug. In addition, since the contact of the connector on the main body side of the receiver is exposed to the outside, there is a high possibility that the contact portion is damaged or the internal circuit connected to the contact is damaged. was there. In addition, it has been difficult to secure the mechanical strength of the jack portion provided on the device body side and realize an ultra-thin shape by adopting a general plug-jack connection structure.

In view of the above-mentioned problems, the present invention adopts a general plug-jack connection structure that uses a generally widely used plug such as a 2.5φ miniature plug, and is provided on the device body side. An object of the present invention is to provide an electronic device having a novel structure that secures the mechanical strength of the jack portion and realizes an ultra-thin shape, and that facilitates attachment and assembly of the plug / jack.

[Means for Solving Problems] In order to solve the above-mentioned problems, an electronic device according to the present invention includes a circuit board on which electronic components constituting an electronic circuit are arranged on at least one surface, and A frame having a substantially flat plate shape arranged so as to cover the surface of the circuit board on which the electronic component is arranged, and a substantially semicircular cross section having a predetermined length with an open end facing one side surface. The insertion groove is formed on one surface, and a protrusion that engages with an engagement hole provided on the circuit board is provided on the other surface opposite to the one surface on which the insertion groove is formed, and A jack housing in which a screw insertion hole penetrating from one surface to the other surface is bored, and a horizontal portion fitted to a positioning portion provided in a frame in which the screw hole is bored,
A metal fitting having an L-shaped cross section formed of a vertical portion provided with an opening, and a mounting plate having a screw insertion hole provided on the surface of the circuit board facing the surface on which the jack housing is mounted. A jack housing in which a projection provided on the jack mounting surface side of the circuit board is engaged with an engagement hole provided in the circuit board, and the horizontal portion is formed with an insertion groove. Of the L-shape so that the vertical portion faces one side surface of the jack housing and the opening is aligned with the opening end of the insertion groove to form a plug insertion hole. Metal fittings are arranged, and the mounting plate is arranged on the surface of the circuit board opposite to the surface on which the jack housing is mounted. The L-shaped metal fittings, the frame, the jack housing, the circuit board, and By fixing the fixing screws by inserting the fixing screws into the respective screw insertion holes provided in the mounting plate, the circuit board and the jack housing are mounted on the frame via the L-shaped metal fittings and the mounting plate, The jack having the plug insertion hole is formed.

[Action]

In the electronic device according to the present invention, the protrusion provided on the jack mounting surface side of the circuit board is engaged with the engaging hole provided on the circuit board to dispose the jack housing, and the horizontal portion is formed with the insertion groove. The plug housing is located on one surface of the jack housing, the vertical portion is opposed to one side surface of the shack housing, and the opening is aligned with the opening end of the insertion groove to form the plug insertion hole. The metal fitting is arranged, and the mounting plate is arranged on the surface of the circuit board opposite to the surface on which the jack housing is mounted. The L-shaped metal fitting, the frame,
The circuit board and the jack housing are mounted on the frame through the L-shaped metal fittings and the mounting plate by inserting and fixing the fixing screws into the respective screw insertion holes provided in the jack housing, the circuit board and the mounting plate. At the same time, a jack having a plug insertion hole is formed.
That is, the common fixing screw is used to mount the circuit board and the jack housing on the frame via the L-shaped metal fitting and the mounting plate.

Therefore, an electronic device including a thin plug / jack whose mechanical strength is guaranteed is configured.

〔Example〕

Hereinafter, an embodiment of an electronic device according to the present invention will be described in detail with reference to the drawings.

The embodiment shown in FIGS. 1 to 6 is one in which the present invention is applied to a so-called card type radio receiver.

In this embodiment, as shown in the external perspective view of FIG. 2, the receiver main body 20 is formed into a card-shaped ultrathin rectangular shape, a frequency display window 22 is formed on one side 21, and band switching is performed. A knob 23 is provided. Also, on one side 24 of the receiver body 20, a power switch button 25, a power display window
26, volume control dial 27, earphone jack 28 are arranged.

As shown in the exploded perspective view of FIG. 3, the receiver main body 20 includes a circuit board 29 on which various components constituting the receiver are arranged, and a component arrangement surface 29A side of the circuit board 29. A frame 30 having a substantially flat rectangular shape formed by molding a synthetic resin material arranged so as to cover the circuit board 29 and a frame.
The shield plates 31 and 32 and the decorative sheets 33 and 34, which are arranged so as to face each other with the 30 in between, are provided, and these are laminated and integrated.

On the circuit board 29, various electronic components 3 constituting the receiver are provided.
5, a battery 36 for power supply, a ferrite bar antenna 37, etc., a band changeover switch 38 which is operated to be changed by the band changeover knob 23, a volume control 39 which is variably operated by a volume control dial 27, and a jack 28 are provided. ing. In this embodiment, the volume control 39 and the jack 28, which are variably operated by the volume control dial 27, have the ferrite bar antenna 37 slanted with respect to the short side of the circuit board 29 in order to increase the length of the ferrite bar antenna 37. They are arranged in a triangular space formed by arranging them.

Here, each of the shield plates 31 and 32 is formed in a shape in which corresponding portions are cut out so as not to shield the portion of the ferrite bar antenna 37. In addition, the notch of each shield plate 31, 32 is the frame 3
The outer surface is made flush by changing the thickness of 0 and disposing the spacer sheet 40. The shield plates 31 and 32 also serve to reinforce the entire receiver body 20, and are stainless plates, for example.

In this embodiment, the earphone jack 28 is fitted with a general miniature plug 43 having a tip 41 and a sleeve 42 having a shape as shown in FIG. 4, and a plug insertion groove 44 that fits this plug 43. It is provided with a plate-shaped jack housing 45 in which is formed.

As shown in FIG. 1, the jack housing 45 has, on one surface 45A, a plug insertion groove 44 having a substantially semicircular cross section and having a predetermined length with an open end facing one side surface 45C. The other surface 45B facing the one surface 45A serves as a mounting surface to the circuit board 29.

Further, on the one surface 45A of the jack housing 45 in which the plug insertion groove 44 is formed, the chip contact spring 46, which is an electrode contact piece having a plurality of elasticity, and the plug insertion groove 44.
A sleeve contact spring 47 is attached to which the sleeve 42 inserted through the sleeve contacts. The above chip contact spring 46 and sleeve contact spring 47
Faces each contact portion 46A, 47A on one end side so as to slightly project into the plug insertion groove 44, and fixes the intermediate portion 46B, 47B on one surface 45A of the jack housing 45 by ultrasonic welding. Installed. Further, the terminal portions 46C, 47C on the other end side of the chip contact spring 46 and the sleeve contact spring 47 are projected to the side of the jack housing 45, and are led out onto the circuit board 29 to which the jack housing 45 is attached. . The tip contact spring 46 and the sleeve contact spring 47 are
The jack housing 45 is arranged in the notch grooves 46D and 47D formed on the one surface 45A so as not to project from the one surface 45A.

Further, the jack housing 45 shown in FIG.
As shown in the figure, a break contact spring 48 having a contact portion 48A that is in constant contact with the contact portion 46A of the chip contact spring 46 is provided. The break contact spring 48 is fixed to the jack housing 45 by ultrasonic welding, and the terminal portion 48B is led out to the other side surface of the jack housing 45.

Further, as shown in FIG. 5, the jack housing 45 is provided with mounting projections 51 and 52 having screw insertion holes 49 and 50 formed on the left and right side surfaces, respectively. Further, in the jack housing 45, in order to improve the mechanical strength by increasing the thickness of the portion where the plug insertion groove 44 is formed,
As shown in FIG. 6, a protrusion 53 and a plurality of positioning protrusions 54 are provided on the lower outer wall portion having a height corresponding to the thickness t of the circuit board 29.

On the other hand, in the circuit board 29 on which the jack housing 45 is arranged, a notch 55 and a positioning hole 56 are formed at portions corresponding to the projection 53 and the positioning projection 54 provided on the lower outer wall portion of the jack housing 45, respectively. Is being done,
Each terminal part of each contact spring 46, 47, 48 46C, 47C, 48
A connection land is formed at a position corresponding to B. Then, the jack housing 45 includes the protrusion 53 and the positioning protrusion.
54 is fitted into the notch 55 and the positioning hole 56, respectively, and the other surface 45B is provided on the surface of the circuit board 29 on which the electronic component 35 is attached.
Is provided as a mounting surface. In addition, each contact spring 46, 47, 48 provided on the jack housing 45
Each terminal part 46C, 47C, 48B projected on the circuit board 29 of
Are soldered to the connection lands provided on the surface of the circuit board 29 on which the electronic component 35 is attached, and are electrically connected to the circuit pattern on the circuit board 29.

As described above, the frame 30 is overlapped so as to cover the surface of the circuit board 29 to which the jack housing 45 is attached and to which the electronic component 35 is attached. That is, the frame 30 is
One surface 45A side of the jack housing 45 is butted. As shown in FIG. 1, in the portion of the frame 30 facing the jack housing 45, the jack housing 45
A plug escape groove 57 is formed at a position facing the plug insertion groove 44 having a semicircular cross section provided in the. This plug insertion groove 44
The plug escape groove 57 constitutes a plug insertion portion having a circular cross section.

Further, a notch 59 is provided at a portion of the frame 30 where the opening end side of the plug insertion groove 44 provided in the jack housing 45 faces.
Is formed, and the opening end side of the plug insertion groove 44 is exposed. Further, recesses 59A, 59B, which are located on one side of the frame 30 facing the circuit board 29 and on the other side of the frame 30 on both sides of the notch 59, serve as mounting portions for the metal fittings 58 for reinforcement.
Are formed. The reinforcing metal fitting 58 attached to the frame 30 via the recesses 59A and 59B has the plug insertion groove 44
It has a horizontal portion 62 narrower than the length and a vertical portion 64 provided with a circular opening 63, and is formed to have an L-shaped cross section. In the L-shaped metal fitting 58, the horizontal portion 62 is fitted in the concave portions 59A and 59B, the vertical portion 64 is opposed to the one side surface 45C of the jack housing 45, and the opening portion 63 formed in the vertical portion 64 is formed. The plug insertion groove 44 is fitted to the open end of the frame 30 and attached to the frame 30.

By the way, in the horizontal portion 62 of the L-shaped metal fitting 58 for reinforcement, the screw insertion holes 60 corresponding to the screw insertion holes 49, 50 formed in the respective mounting projections 51, 52 of the jack housing 45. , 61 are drilled. And this metal fitting 58 for reinforcement
Are fixed to the frame 30 as follows. That is, the reinforcing fixing plate 65 is arranged so as to face the horizontal portion 62 of the metal fitting 58 with the mounting projections 51, 52 of the jack housing 45 interposed therebetween. Then, from the side of the reinforcement fixing plate 65, this reinforcement fixing metal fitting 65
Fixing screws 66, 6 through the screw insertion holes 65a and 65b formed in the
7 is inserted into the screw insertion holes 49 and 50 formed in the mounting projections 51 and 52 of the jack housing 45, and is screwed into the screw insertion holes 60 and 61 of the reinforcing L-shaped metal fitting 58 side. As a result, the metal fitting 58 for reinforcement can be fixed to the frame 30.

In the recesses 59A and 59B into which the horizontal portion 62 of the L-shaped metal fitting 58 of the frame 30 is fitted, the screw insertion holes 70 and 60 corresponding to the screw insertion holes 60 and 61 formed in the horizontal portion 62 are provided. 71 is drilled.

The L-shaped metal fitting 58 for reinforcement is formed by zinc die casting.

As described above, in this embodiment, the common fixing screws 66 and 67 are sandwiched between the reinforcing metal fitting 58 and the reinforcing fixing plate 65 with the frame 30, the jack housing 45, and the circuit board 29 sandwiched therebetween.
Are integrally fixed by. Therefore, the mechanical strength of the earphone jack 28 portion is further increased.

Further, since the plug 43 is inserted / removed through the plug insertion opening 63 provided in the vertical portion 64 of the reinforcing metal fitting 58, the plug 43 may be twisted during insertion / removal. Sufficient durability can be obtained even with respect to forces other than the axial direction.

Further, as in this embodiment, a part of the frame 30 is also used as a part of the housing of the earphone jack 28, so that the thickness of the receiver main body 20 is reduced and the general plug 43 is used. be able to.

Furthermore, in the earphone jack 28, the contact springs 46, 47, 48, which are the electrode contact pieces, are desired to be outward when the jack housing is attached to the circuit board, so that electrical continuity of this electronic device is maintained. Inspection and visual inspection can be easily performed. At this time, each contact 46 on one end side of each contact spring 46, 47 which is an electrode contact piece to be used
By adjusting the degree of protrusion of A and 47A into the plug insertion groove 44 by using a tool, for example, the contact force of each contact portion 46A and 47A with respect to the plug 43 can be easily adjusted.

[Effect of device]

As described above, in the electronic device according to the present invention, the protrusion provided on the jack mounting surface side of the circuit board is engaged with the engaging hole provided on the circuit board to dispose the jack housing, and the horizontal portion is inserted. It is positioned on one surface of the jack housing in which the groove is formed, the vertical portion is opposed to one side surface of the jack housing, and the opening is aligned with the opening end of the insertion groove to form the plug insertion hole. An L-shaped metal fitting is provided, and a mounting plate is provided on the surface of the circuit board opposite to the surface on which the jack housing is mounted.
The circuit board and the jack housing are mounted on the frame through the L-shaped metal fittings and the mounting plate by inserting and fixing the fixing screws into the respective screw insertion holes provided in the jack housing, the circuit board and the mounting plate. At the same time, a jack having a plug insertion hole is formed. That is, since the circuit board and the jack housing are attached to the frame via the L-shaped metal fittings and the attachment plate by the common fixing screw, the thin plug which is easy to assemble and guarantees the mechanical strength. -An electronic device with a jack is configured.

Furthermore, when assembled as an electronic device, a plug jack having a plug insertion hole is necessarily formed, which facilitates assembly.

[Brief description of drawings]

1 to 6 show an embodiment of a card type radio receiver to which the present invention is applied, FIG. 1 is a vertical sectional side view of a jack portion, and FIG. 2 is a card type radio receiver. FIG. 3 is an exploded perspective view of a card type radio receiver, FIG. 4 is a plan view of a plug attached to the jack, and FIG. 5 is a plan view of a jack portion. FIG. 6 is a cross-sectional front view of the jack portion. FIG. 7 is an external perspective view of a conventional card type radio receiver. 20 …… Receiver body 28 …… Earphone jack 29 …… Circuit board 30 …… Frame 43 …… Plug 44 …… Plug insertion groove 45 …… Jack housing 58 …… L-shaped metal fittings 59A, 59B …… Concave 63 …… Plug insertion hole 66,67 …… Fixing screw

Claims (1)

[Scope of utility model registration request] 1. A circuit board on which electronic components constituting an electronic circuit are disposed on at least one surface, and a substantially flat plate shape disposed so as to cover the surface of the circuit substrate on which the electronic components are disposed. A frame and an insertion groove having a substantially semicircular cross-section having a predetermined length with an open end facing one side surface are formed on one surface,
A screw insertion hole that is provided with a protrusion that engages with an engagement hole provided in the circuit board on the other surface that faces the one surface where the insertion groove is formed, and that penetrates from the one surface to the other surface side A jack housing having a hole formed therein, a horizontal portion that fits into a positioning portion provided on a frame having a screw hole, and a metal fitting having an L-shaped cross section that includes a vertical portion provided with an opening, and the above circuit. A mounting plate having a screw insertion hole formed on a surface opposite to a surface of the board on which the jack housing is mounted, and a protrusion provided on the jack mounting surface side of the circuit board on the circuit board; The jack housing is disposed by engaging with the provided engagement hole, the horizontal portion is positioned on one surface of the jack housing having the insertion groove, and the vertical portion is on one side surface of the jack housing. Insert the above through the opening facing each other The above-mentioned L is formed by aligning the open ends of the grooves to form plug insertion holes.
An L-shaped metal fitting is disposed, and the mounting plate is disposed on a surface side of the circuit board opposite to a surface on which the jack housing is mounted, the L-shaped metal fitting, the frame, the jack housing, and the circuit. The circuit board and the jack housing are mounted on the frame through the L-shaped metal fittings and the mounting plate by inserting and fixing the fixing screws into the respective screw insertion holes provided in the circuit board and the mounting plate. Also, an electronic device formed by forming a plug / jack having the plug insertion hole.