JPH0413831Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a front operating device for a car stereo.

[Prior art]

The front operation section of the car stereo consists of a volume adjustment section consisting of a variable resistor for volume adjustment and various electronic components;
It consists of a balance adjustment section consisting of a variable resistor for balance adjustment and various electronic components, an equalizer adjustment section consisting of a sliding variable resistor for equalization adjustment and various electronic components, a tape changeover switch, various indicator lamps, etc. It consists of a cassette tape insertion indicator.

Conventionally, these car stereo front operation units were constructed by car stereo set manufacturers purchasing the above-mentioned parts that make up the car stereo front operation unit, and distributing these parts to form a space for inserting a cassette. The various parts that make up the front operation section were assembled and manufactured as a front operation section that was attached to a car stereo.

[Problem that the invention attempts to solve]

However, now that automobiles have become widespread and the demand for car stereos has increased accordingly, it is no longer possible for set manufacturers to purchase the various parts that make up the front control section of a car stereo, as in the past. It seems that each part was assembled and manufactured as a front operation unit attached to a car stereo.
There were difficult problems such as parts ordering, assembly, wiring work, quality control, etc. that required a lot of time and man-hours, and the manufacturing cost of the entire car stereo increased.

This invention was made in view of the above points, and when a set maker assembles a car stereo,
An object of the present invention is to provide a small car stereo front operating device that requires fewer assembly steps and is excellent in quality control and manufacturing cost reduction.

[Means for solving problems]

In order to solve the above problems, the present invention provides a car stereo front operation device that includes various electronic parts such as a volume adjustment section, a balance adjustment section, an equalizer adjustment section, and a cassette tape insertion display section, which constitute the front operation section of the car stereo. It is equipped with a rigid printed circuit board on which various electronic components are arranged and mounted as blocks on the surface, and a flexible circuit board on which integrated circuit elements constituting the equalizer adjustment section are mounted.
A recess for inserting a cassette tape is formed in a predetermined part on one side of the printed circuit board, and a flat cable is formed on the flexible circuit board with a lead pattern connected to the wiring pattern and terminal pattern formed on the flexible circuit board. A flexible board is arranged and fixed on the back side of the printed circuit board, and the terminal pattern of the flexible board and the corresponding terminal pattern of the printed circuit board are electrically connected, and the flexible board was bent to form a space behind the cassette tape insertion recess of the printed circuit board.

[Effect]

The front control device of the car stereo is as shown above.
It consists of a printed circuit board on which various electronic components are mounted in blocks for each part, and a flexible circuit board on which integrated circuit elements constituting the equalizer adjustment section are mounted, so when assembling the front operation device of the car stereo, each electronic component can be easily assembled. There is no need to connect with lead wires, which greatly reduces assembly man-hours. Furthermore, when a set maker assembles a car stereo, the front operating device can be treated as one component.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a diagram showing the structure of a car stereo front operating device according to the present invention, in which FIG. 1A is a front view and FIG. 1B is a plan view. As shown, printed circuit board 1
1, there are a variable resistor 12 for volume adjustment, a variable resistor 13 for balance adjustment, and a changeover switch 14 for changing the tape, etc., which constitute the front operation device of the car stereo.
5. Flexible board 16, for tape direction indication
An LED 17, an illumination lamp 18, a seven-element equalizer sliding variable resistor 19, and the like are mounted. As will be described later, the flexible board 16 includes a lead wire pattern section connected to each terminal of the car stereo front operation section circuit and a flat cable section provided with a wiring pattern, and the terminals of the lead wire pattern section are connected to the printed circuit board 11. An integrated circuit 21 constituting an equalizer amplifier circuit is mounted on the flexible substrate 16. In addition, 20 in the figure is a case 2 that accommodates a variable resistor 12 for volume adjustment, a variable resistor 13 for balance adjustment, and a sliding type variable resistor 19 for a seven-element equalizer.
2 is a lead wire consisting of three conducting wires. Also,
A cassette tape is attached to the upper end of the printed circuit board 11.
A recess 11q is formed as a space for inserting the CT. Hereinafter, each structure of the above-mentioned parts will be explained in detail using the drawings.

FIG. 2 is a circuit diagram showing the circuit configuration of the front operation section of the car stereo. As shown in the figure, the front operation circuit of the car stereo is comprised of a volume adjustment section 1, a balance adjustment section 2, an equalizer adjustment section 3, and a cassette tape insertion display section 4. The volume adjustment section 1 is equipped with a changeover switch 15 and a volume adjustment variable resistor 12 shown in FIG. 1, the balance adjustment section 2 is equipped with a balance adjustment variable resistor 13, etc., and the equalizer adjustment section 3 is equipped with an equalizer sliding It is equipped with a variable resistor 19, an integrated circuit element 21 constituting an amplifier circuit 21', etc., and the cassette tape insertion display section 4 is further equipped with a changeover switch 14, a direction display LED 17, illumination lamps 18, 18', etc. . Also,. The terminals of the front operation circuit of the car stereo are terminals 1 to 1 of the connection plug T1 of the flexible board 16 in FIG.
10, and the terminals A to C correspond to the terminals A to C of the terminal portion T2 of the lead wire 22.

FIG. 3 is a diagram showing the structure of the printed circuit board 11.
Figure a is a front view, and figure b is a back view. On the surface of the printed circuit board 11, a predetermined wiring pattern P,
A resistive element pattern and a current collecting conductor pattern are arranged, and when explained in comparison with FIG.
A changeover switch 14 is mounted in the part a, a changeover switch 15 in the part 11b, and a direction display LED 17 in the part 11c. In addition, the resistance element and current collecting conductor pattern of the variable resistor 12 for volume adjustment are placed in the 11d part, and the resistance element and current collecting conductor of the balance adjusting variable resistor 13 are placed in the 11e part.
Resistance elements of a seven-element equalizer sliding variable resistor 19 and a current collecting conductor pattern are arranged in the 1f portion. A predetermined wiring pattern P is provided on the back surface of the printed circuit board 11, and a terminal pattern 11g is also formed on the back surface of the printed circuit board 11.
and a terminal pattern 11h. As will be described later, a terminal pattern 16a (see FIG. 4) of the flexible substrate 16 is bonded to the terminal pattern 11g by soldering, and one end of a lead wire 22 is connected to the terminal pattern 11h by soldering. Note that a large number of holes 11 formed in the printed circuit board 11
r is a hole for attaching the case 20 to the printed circuit board 11 as described later.

FIG. 4 is a surface view showing the structure of the flexible substrate 16. The flexible board 16 is made of a thin resin material, and includes a wiring pattern part 161 having a predetermined wiring pattern P, a flat cable part 162 having a lead wire pattern RP and a plug part _T1 at the end, and a terminal pattern. 16a and terminal pattern 1
It consists of a terminal pattern part 163 on which 6b is applied,
Furthermore, there are soldering parts and plug parts on these patterns.
All except T ₁ are laminated with insulating material. As described above, the terminal pattern 16a is a terminal pattern that is connected to the terminal pattern 11g on the back side of the printed circuit board 11 by soldering, and the terminal pattern 16b constitutes the amplifier circuit 21' of the equalizer adjustment section 3 shown in FIG. Pin 2 of integrated circuit element 21
This is the terminal pattern to which 1a is connected.

FIG. 6 is a diagram showing the structure of the case 20.
is a front view, b is a plan view, c is a back view, d is a sectional view taken along line GG in b, and e is a view taken from the direction of arrow H in b. It is. Case 2
0 is an integrally molded resin material, and includes a recess 31 for housing the element of the variable resistor 12 for volume adjustment;
A recess 32 for accommodating the balance adjustment variable resistor 13, recesses 33 and 34 for accommodating the changeover switches 14 and 15, and seven variable resistor elements constituting the equalizer sliding variable resistor 19. Recesses 35 to 41 for storage and plate members 42 and 43 for placing the integrated circuit 21 and the like are provided. A hole 31a into which the operating shaft of the volume adjustment variable resistor 12 is inserted and a balance adjustment variable resistor 13 are provided in the center of each of the recesses 31 and 32.
A hole 32b into which an operating shaft is inserted is provided, and an operating lever for the resistor element of the equalizer sliding variable resistor 19 is provided in the center of each of the recesses 35 to 41 for accommodating the variable resistor element. Insertion hole 3
5a to 41a are provided. Changeover switch 1
Holes 33a, 34a through which the terminals of the changeover switches 14, 15 pass are provided in the recesses 33, 34 that accommodate the switches 4, 15. Further, the plate members 42 and 43 for housing the integrated circuit 21 and the like are provided with plate-shaped protrusions 42a and 43a, respectively, and the distance between the protrusions 42a and 43a is determined by the vertical dimension of the integrated circuit 21. 1 (see Figure 5). case 20
There is a hole 11 provided in the printed circuit board 11 on the back side of the
A large number of support rods 20a are provided for inserting the tips into r and fixing them by heat caulking.

When assembling a car stereo front operating device, first attach each component such as the variable resistor element for the volume adjustment variable resistor 12, the balance adjustment resistor 13, and the equalizer sliding variable resistor 19 to the surface of the printed circuit board 11. After mounting, the case 20 is placed over these parts, and the tip of the rod member 20a is heat-stamped to fix the case 20 to the printed circuit board 11. Thereafter, the direction indicating LED 17 is inserted into the recesses 33 and 34, and its terminals are soldered to the pattern of the printed circuit board 11 and attached. On the other hand, as shown in FIG.
The bent pins 21a of the integrated circuit element 21 are soldered and mounted. Thereafter, the terminal pattern 16a and the terminal pattern 11g are soldered to the back surface of the printed circuit board 11, and the flexible board 16 is electrically connected to the printed circuit board top 11. Next, as shown in FIG. 8 (side view showing the printed circuit board 11 and flexible circuit board 16), it is bent using double-sided adhesive tape PT. As a result, the printed circuit board 11
A space for inserting the cassette tape CT is secured in the upper part of the recess 11q, and since the double-sided adhesive tape is interposed in the double-sided bent portion, the wiring pattern portion 161 of the flexible substrate 16 is not bent into an acute angle. Since it can be bent gently, there is no need to worry about the wiring pattern breaking. In addition, in the above example, double-sided adhesive tape PT
The wiring pattern portion 161 was bent using
It goes without saying that the adhesive is not limited to double-sided adhesive tape, and other adhesive means may be used as long as the bent portion is gently bent and fixed.

The integrated circuit element 21 is fixed on the plate members 42 and 43 between the protrusions 42a and 43a by bonding both ends thereof with an adhesive. Further, the lead wire 22 has its end connected to the terminal pattern 11h on the back surface of the printed circuit board 11.
Connect and install. The flat cable portion 162 of the flexible substrate 16 is further fixed onto the printed circuit board 11 with adhesive tape or the like. The plug portion T1 of the flat cable 16 and the terminal portion T2 of the lead wire 22 are connected to the connector.

By configuring the car stereo front operating device as a single component as described above, the following advantages can be obtained compared to conventional car stereo front operating devices.

Conventionally, variable resistors for each adjustment, changeover switches,
There were more than 40 wires from various electronic components such as integrated circuits, and it was necessary to connect them one by one, but since only two connectors are required, the assembly manufacturer can reduce the number of assembly steps when assembling a car stereo. can be significantly reduced, and since each wiring is soldered onto one printed circuit board 11, the reliability of the solder is increased.

Conventionally, each electronic component is mounted individually, which increases the size of the car stereo front operation device, but since each electronic component is mounted on a single printed circuit board 11, the size can be reduced. It becomes possible to improve accuracy.

[Effect of idea]

As explained above, according to the present invention, the following excellent effects can be obtained.

It consists of a printed circuit board on which various electronic components are mounted in blocks for each part, and a flexible circuit board on which integrated circuit elements constituting the equalizer adjustment section are mounted. Ordering work can be significantly reduced.

Further, since there is no wiring work to connect each electronic component with lead wires, the number of assembly steps is greatly reduced, and quality control such as dimensional accuracy and soldering reliability is extremely facilitated.

Further, the front operation device of the car stereo can be made smaller and the manufacturing cost can be reduced.

Furthermore, since the flat cable portion is formed integrally with the flexible substrate, there is no need for complicated wiring work using lead wires when connecting this front operating device to other equipment.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the structure of a car stereo front operating device according to the present invention, in which Fig. 1a is a front view, Fig. 2b is a plan view, and Fig. 2 is a circuit showing the circuit configuration of the front operating part of the car stereo. Figure 3 shows the printed circuit board 11
FIG. 4 is a front view showing the structure of the flexible substrate 16, FIG. 5 is a diagram showing the external shape of the integrated circuit, and FIG. 2 shows the structure of the case 20, where a is a front view, b is a top view, c is a back view, and d is a back view.
is a cross-sectional view taken along the line GG in Figure b, Figure e is a view taken from the direction of arrow H in Figure b, and Figure 7 is a diagram showing a state in which integrated circuit elements are mounted on a flexible substrate.
FIG. 8 is a side view showing the printed circuit board and flexible circuit board portions. In the figure, 1...Volume adjustment section, 2...Balance adjustment section, 3...Equalizer adjustment section, 4...Cassette tape insertion display section, 11...Printed circuit board, 12...
... Volume resistor for volume adjustment, 13 ... Variable resistor for balance adjustment, 14, 15 ... Changeover switch, 15 ... Changeover switch, 16 ... Flexible board, 17 ... LED for direction display, 18 ... Lighting 19... Sliding type variable resistor for equalizer, 20... Case, 21... Integrated circuit element.

Claims (1)

[Scope of Claim for Utility Model Registration] A car stereo front operation device comprising various electronic components such as a volume adjustment section, a balance adjustment section, an equalizer adjustment section, and a cassette tape insertion display section, which constitute the front operation section of the car stereo, A rigid printed circuit board on which various electronic components are arranged and mounted as blocks for each section, and a flexible circuit board on which integrated circuit elements constituting the equalizer adjustment section are mounted, one side of the printed circuit board. A recess for inserting a cassette tape is formed in a predetermined part of the flexible board, and a flat cable part on which a lead pattern connected to a wiring pattern and a terminal pattern formed on the flexible board is integrally formed. The flexible substrate is arranged and fixed on the back surface of the printed circuit board, the terminal pattern of the flexible substrate and the corresponding terminal pattern of the printed circuit board are electrically connected, and the printed circuit board of the flexible substrate is A front operating device for a car stereo, characterized in that the board is bent so that a space is formed behind a recess for inserting a cassette tape.