JPH0419673Y2 - - Google Patents

Description

[Detailed Description of the Invention] The connection structure of the built-in microphone in the recording device of the present invention will be explained according to the following items.

A Industrial field of application B Overview of the invention C Prior art C-1 First conventional example [Figure 9] C-2 Second conventional example [Figure 10] D Problem that the invention attempts to solve E Problem Means for solving the problem F Example a Cassette tape recorder [Figures 1 and 2] b Cushion sheet [Figures 1 to 5] c Built-in microphone [Figures 2 to 4] d Flexible printed circuit board [Figures 2 to 8
Figure] d-1 Built-in microphone side end [Figures 2 to 5] d-2 Printed circuit board side end [Figures 2 and 3
Figures 6 to 8] d-3 Connection to printed circuit board [Figure 8] e Cover [Figures 1, 3, 5] G Effect of the invention (A Field of industrial application) ) The present invention relates to a novel built-in microphone.
Specifically, the connection between the microphone built in the recording device and the printed circuit board is made by a low-cost connection means, and the vibration is not transmitted to the built-in microphone through the connection means. This paper attempts to provide a connection structure for a built-in microphone in a new recording device.

(B Outline of the invention) The connection structure of the built-in microphone in the recording device of the present invention aims to reduce costs by connecting the built-in microphone and the printed circuit board with a flexible printed circuit board, and also has a flexible structure. By pressing at least a portion of the end of the printed circuit board on the built-in microphone side with the cushion sheet on which the built-in microphone is placed, vibrations transmitted through the flexible printed circuit board are absorbed by the cushion sheet. This prevents the signal from being transmitted to the built-in microphone.

(C. Prior Art) Several structures have been employed for connecting the built-in microphone and the printed circuit board in recording devices.

(C-1 First Conventional Example) [FIG. 9] FIG. 9 shows a first conventional example regarding the connection between the built-in microphone and the printed circuit board.

a is a built-in microphone, and wires d, d are connected between its lead terminals b, b and the printed circuit board c.
connected by.

(C-2 Second Conventional Example) [FIG. 10] FIG. 10 shows a second conventional example regarding the connection between the built-in microphone and the printed circuit board.

This connects a flexible printed circuit board e to a printed circuit board c, and connects this flexible printed circuit board e to a lead terminal b of a built-in microphone a.
b is connected by wire rods d and d.

(Problems to be solved by the invention D) The first conventional example (Fig. 9) described above can be adopted if the built-in microphone a and the printed circuit board c are close to each other. If the built-in microphone a and the printed circuit board c are supported by a member that moves relatively, such as if the distance between the built-in microphone a and the printed circuit board c is long, or if the built-in microphone a is attached to a rotating lid, If there is, it cannot be adopted.

Furthermore, in the second conventional example (Fig. 10), even if the built-in microphone a and the printed circuit board c are apart, the built-in microphone a and the printed circuit board c are It can be applied even when the wires d and d are supported by a member that moves, but the cost of the wires d and d is extra, and furthermore, the time and effort of soldering between the wires d and the flexible printed circuit board e is required. This becomes redundant and causes an increase in costs.

(E. Means for solving the problem) The connection structure of the built-in microphone in the recording device of the present invention was made to solve the above-mentioned problem, and the connection structure between the built-in microphone and the printed circuit board is designed to solve the above-mentioned problem. By connecting them with a flexible printed circuit board, material costs and connection man-hours can be reduced. This prevents vibrations from being transmitted to the built-in microphone via the flexible printed circuit board.

(F. Embodiment) Below, details of the connection structure of the built-in microphone in the recording device of the present invention will be explained according to the illustrated embodiment.

The illustrated embodiment is an application of the present invention to a cassette tape recorder.

(a cassette tape recorder) [Fig. 1, 2
Figure ] In the figure, 1 is a cassette tape recorder, and 2 is its outer casing. A mechanical deck, a printed circuit board on which various circuits are formed, a speaker, etc. are housed within this outer casing 2.

Reference numeral 3 designates a cassette lid that opens and closes the tape cassette mounting section in the outer casing 2, and is located at the position shown by the two-dot chain line in Figure 1 (the tape cassette mounting section is opened) and at the solid line (the tape cassette mounting section is opened). It is rotatably supported by the outer casing 2 so as to be rotatable between the closed position and the closed position.

A microphone mounting recess 4 having a substantially rectangular shape is formed at a position close to one side edge of the upper surface of the cassette lid 3 and close to the rotation axis.

Reference numeral 5 designates a lead-in hole formed at one end of the microphone mounting recess 4, that is, at the end closer to the rotation axis of the cassette lid 3.

Further, 6 is a screw insertion hole formed at the bottom of the microphone mounting recess 4.

Furthermore, two positioning holes 7, 7 and two positioning elongated holes 6, 6 are provided at the four corners of the bottom of the microphone mounting recess 4.
is formed. Furthermore, positioning notches 9, 9 are formed at positions lined up on both sides of the lead-in hole 5.

(b Cushion Sheet) [FIGS. 1 to 5] Reference numeral 10 denotes a cushion sheet on which a built-in microphone, which will be described later, is placed. The cushion sheet 10 is made of soft rubber and has a substantially rectangular shape that is sized to fit snugly into the microphone mounting recess 4 formed in the cassette lid 3.

A peripheral wall 11 is integrally formed on the outer peripheral edge of the upper surface of the cushion sheet 10, and positioning projections 12, 12, . . . are integrally formed on the four corners of the bottom surface. And this positioning protrusion 12,1
2, ... are fitted into the positioning holes 7, 7 and positioning elongated holes 8, 8 formed in the microphone mounting recess 4, whereby the cushion sheet 10 is positioned within the microphone mounting recess 4. .

Further, positioning protrusions 13, 13 are integrally protruded from one side edge of the cushion sheet 10,
These positioning protrusions 13, 13 are located in the microphone mounting recess 4.
This also helps in positioning the cushion sheet 10 within the microphone mounting recess 4 .

Then, with the cushion sheet 10 positioned within the microphone mounting recess 4, the microphone mounting recess 4 is opened.
A screw insertion hole 14 is formed at a location corresponding to the screw insertion hole 6 formed in the screw insertion hole 6 .

Reference numeral 15 denotes a microphone mounting portion, and a peripheral wall 16 is protruded from the periphery of the microphone mounting portion, and a notch 17 is formed in one surface of the peripheral wall 16. Such a microphone attachment part 15 is almost separated from other parts of the cushion sheet 10, and is connected to other parts only through a plurality of connecting pieces 18, 18, . . . .

Reference numeral 19 denotes an opening formed by partially cutting out the cushion sheet 10, and the opening 19 is formed at a location close to the side where the notch 17 of the microphone mounting portion 15 is formed.

Reference numeral 20 denotes a retraction hole formed at one end of the cushion sheet 10 to sandwich and draw in a flexible printed circuit board (described later) (see FIG. 5).
With the cushion sheet 10 positioned within the microphone mounting recess 4, the microphone mounting recess 4
It is located at a location corresponding to the lead-in hole 5 formed in the.

Reference numerals 21 and 21 are protrusions for positioning a flexible printed circuit board, which will be described later, and 22 is an LED holding recess.

(c Built-in Microphone) [Figures 2 to 4] 23 is a built-in microphone. The built-in microphone 23 has an outer shape that fits snugly into the microphone mounting portion 15 of the cushion sheet 10, and has lead terminals 24, 24 protruding from the side surface.

(d Flexible printed circuit board) [Figures 2 to 8] 25 is a flexible printed circuit board, which connects the built-in microphone 23 and the outer casing 2.
A connection is made to a printed circuit board 26 supported within.

(d-1 Built-in Microphone Side End) [FIGS. 2 to 5] A microphone connection portion 27 and an LED mounting portion 28 are formed at the end of the flexible printed circuit board 25 on the built-in microphone side.

The microphone connection part 27 consists of an approach part 29 curved into a substantially hairpin shape and a connection part 30 formed at the tip of the approach part 29.
Above is the lead terminal 2 of the built-in microphone 23.
The connection terminal portions 32, 32 of the conductive films 31, 31 connected to the conductive films 4, 24 are exposed. The ends of the lead terminals 24, 24 of the built-in microphone 23 are connected to the connection terminal parts 32, 32 by soldering, and such a connection part 30 is such that the built-in microphone 23 is connected to the cushion sheet. When the cushion sheet 10 is fitted into the microphone mounting part 15 of No. 10, the cushion sheet 10 is located in an opening 19 formed in the vicinity of the microphone mounting part 15.

An insertion hole 33 is formed in the LED mounting part 28, and the LED 3 is inserted between this insertion hole 33.
Connecting terminal portion 3 of conductive films 31, 31 connected to 4
2 and 32 are exposed. and,
The LED 34 is inserted into the insertion hole 33 up to the lead terminals 35, 35 protruding in opposite directions from the side surface of the middle part thereof, and in this state, the lead terminals 35, 35 are soldered to the connection terminal parts 32, 32. connected by.

The portion of the LED 34 that protrudes downward from the insertion hole 33 is fitted into the LED holding recess 22 formed in the cushion sheet 10.

In addition, the LED of the flexible printed circuit board 25
Positioning holes 36, 36 are formed in the mounting portion 28, and the positioning protrusions 21, 21 formed on the cushion sheet 10 are fitted into the positioning holes 36, 36, whereby the LED mounting portion 28 is positioned relative to the cushion sheet 10.

(d-2 Printed circuit board side end) [Figures 2, 3, 6 to 8] The printed circuit board side end of the flexible printed circuit board 25 has a shape as shown in Figure 7. are doing. To obtain this shape, first, it is formed as shown in FIG. 6, and then bent to form the shape shown in FIG. 7.

That is, as shown in FIG. 6, first, a slit 37 extending from the side opposite to the tip to the middle of the rectangular portion is formed, and the slit 37
The connecting part 38 of the two parts divided by
Engagement notches 40, 40 are formed on both side edges approximately corresponding to the depths of the slit 37 on the side that is not connected to the connecting portion 39, that is, on the side that becomes the connecting portion 39.

41, 41, . . . are connection terminal portions of the respective conductive films 31, 31, . . . and the two engagement notches 40, 4
They are exposed so as to be in contact with the tip (the part that becomes) of the line connecting 0.

Of the two divided parts, the part 42 connected to the connecting part 38 is connected to the slit 37.
A line extending from the back to the side (shown as a dotted line)
The sheet is folded in two along the same direction, and this state is fixed with an appropriate means such as adhesive or double-sided adhesive tape to form the shape shown in FIG.

(d-3 Connection to a printed circuit board) [Fig. 8] A notch 43 is formed at the edge of the printed circuit board 26 where the flexible printed circuit board 25 is connected. Among the formed conductive films, the flexible printed circuit board 25
Connecting terminal section 4 of the thing 44, 44, ... to be connected to
5, 45, . . . are arranged along the inner edge 43a of the notch 43.

Therefore, the connecting portion 39 on the printed circuit board side of the flexible printed circuit board 25 is connected to the engaging notch 4 of the flexible printed circuit board 25.
0 and 40 are located on both side edges 43b and 43b of the notch 43 formed in the printed circuit board 26, respectively, and a rear edge 43a.
is engaged until it comes into contact with. At this time, connection part 3
9 is positioned such that the exposed surface of the connecting terminal portions 41, 41, . . . When the connecting portion 39 comes into contact with the inner edge 43a of the notch 43, the connecting terminal portions 41, 41, . . . formed on the connecting portion 39 and the printed circuit board 2
The connection terminal parts 45, 45, ... formed in 6 come into contact with each other at an angle of 90° (8th
(see figure). Therefore, flexible printed circuit board 2
5 and the connecting terminal portions 45, 45, . . . of the printed circuit board 26 are connected by soldering. As a result, predetermined conductive films 31, 31, . . . of the flexible printed circuit board 25 and predetermined conductive films 44, 44, .
A connection will be made between the two.

(e Cover) [Figs. 1, 3, and 5] 46 is a cover for covering the microphone mounting recess 4 formed in the cassette lid 3. A boss portion 48 having a screw hole 47 is integrally formed on the back surface of the cover 46, and the cover 46 is connected to the microphone mounting recess 4.
The cushion sheet 10 is inserted into the peripheral wall 11 of the cushion sheet 10, and is inserted through the screw insertion hole 6 formed in the microphone mounting recess 4 and the screw insertion hole 14 formed in the cushion sheet 10. The attached mounting screws 49 are screwed into the screw holes 47 of the cover 46, thereby attaching the cover 46 to the cassette lid 3.

The connecting portion 3 of the flexible printed circuit board 25 is inserted into the lead-in hole 5 of the microphone mounting recess 4 and inserted into the lead-in hole 20 of the cushion sheet 10.
8 is pressed against the cushion sheet 10 by the edge of the cover 46 when the cover 46 is attached to the cassette lid 3 as described above.

Note that 50 is a display hole formed in the cover 46, and when the cover 46 is attached to the cassette lid 3, the LED 34 is exposed to the outside through the display hole 50.

(G. Effect of the invention) As is clear from the above description, the connection structure of the built-in microphone in the recording device of the present invention connects the built-in microphone and the printed circuit board using a flexible printed circuit board, and The built-in microphone is placed on a cushion sheet made of an elastic material, and at least a part of the end of the flexible printed circuit board on the side of the built-in microphone is pressed by the cushion sheet.

Therefore, according to the present invention, since the built-in microphone and the printed circuit board are connected by the flexible printed circuit board, the material cost and work hours for the connection are reduced, and the built-in microphone and the printed circuit board are connected. Even if the printed circuit board is attached to a member that is moved relative to it, no problem arises.

Additionally, flexible printed circuit boards have the problem of transmitting vibrations more easily than wire rods, but in this invention, at least a portion of the end of the flexible printed circuit board on the built-in microphone side is pressed into contact with an elastic cushion sheet. Therefore, vibrations transmitted through the flexible printed circuit board due to the rotation of the motor, etc. are absorbed by the cushion sheet, resulting in good vibration resistance.

As shown in the above embodiment, if a hairpin-shaped approach portion 29 is formed at the microphone connection portion of the flexible printed circuit board, even if vibrations are transmitted, this approach portion 29 will dampen the vibrations. Therefore, the vibration resistance is further improved.

[Brief explanation of the drawing]

Figures 1 to 8 show an example of an implementation in which the connection structure of the built-in microphone in the recording device of the present invention is applied to a cassette tape recorder.
The figure is a perspective view of the cassette tape recorder, Figure 2 is a perspective view with the cover of the microphone mounting section removed, Figure 3 is an exploded perspective view of the main parts, Figure 4 is a plan view of the main parts, and Figure 5 is a perspective view of the main part. The figure is an enlarged cross-sectional view taken along the line V-V in Figure 4 with the cover attached, Figures 6 and 7 show the connection part on the printed circuit board side of the flexible printed circuit board, and Figure 6 shows the connection part on the printed circuit board side of the flexible printed circuit board. FIG. 7 is a plan view just before the shape is completed, FIG. 8 is a perspective view showing the connection state between the flexible printed circuit board and the printed circuit board, and FIGS. 9 and 10 are views of the conventional recording device. FIG. 7 is a perspective view showing different examples of connection structures for built-in microphones. Explanation of symbols, 1...Recording device, 10...Cushion sheet, 23...Built-in microphone, 25
...Flexible printed circuit board, 26...Printed circuit board.

Claims (1)

[Claims for Utility Model Registration] The built-in microphone and the printed circuit board are connected by a flexible printed circuit board, and the built-in microphone is placed on a cushion sheet made of an elastic material, and the flexible printed circuit board is connected to the printed circuit board. A connection structure for a built-in microphone in a recording device, characterized in that at least a part of the end of the substrate on the side of the built-in microphone is pressed into contact with the cushion sheet.