JPH0731437Y2 - Electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is most suitable for application to electronic devices such as recording / reproducing devices, and in particular, electrical connection between a mechanical component and a printed circuit board. It is about structure.

[Outline of device]

This invention relates to electrically connecting a mechanical component of an electronic device such as a recording / reproducing device to a printed circuit board by mounting the mechanical component and the printed circuit board on both sides of a mounting base. It is possible to reduce the size and weight of the electronic device by directly connecting the connector with a connector.

[Conventional technology]

As is conventionally known, in a recording / reproducing apparatus such as a VTR, mechanical parts such as a rotating head drum in a recording / reproducing mechanism portion of a cassette tape are electrically connected to a printed circuit board by a harness (a bundle of electric wires).

[Problems to be solved by the invention]

At this time, in order to prevent the harness from being accidentally drawn to various movable parts or live parts and being disconnected or electrically shorted, it is necessary to wire the harness in the case with a margin. . Therefore, conventionally, the case becomes large in size, the weight of the harness is increased, and the cost of the harness is increased. In addition, in the mechanism for connecting the mechanical component to the printed circuit board by the harness, attachment / detachment of the mechanical component to / from the mounting substrate such as mechanical deck and connection / disconnection of the harness to the printed circuit board must be performed separately. It was troublesome to assemble and disassemble.

This invention has been made in order to solve the above problems, and enables a mechanical component and a printed circuit board to be directly connected by a connector without using a harness or a flexible printed circuit board. An electronic device is provided.

[Means for solving problems]

Of the pair of connectors which are provided at both sides of the mounting base body with mechanical parts detachably mounted from the direction perpendicular to the mounting base body and the printed circuit board, and which are inserted into each other from the direction perpendicular to the mounting base body. One of them is directly attached to the attachment surface side of the mechanical component to the attachment base, and
The other connector is attached to the printed board, and the pair of connectors are inserted and connected at the same time as the step of attaching the mechanical component and the printed board to the attachment base.

[Action]

According to the electronic device of this invention, since the connector is directly provided on the mounting surface side of the mounting base of the mechanical component that is mounted so as to face the printed circuit board by sandwiching the mounting base, without using a harness or a flexible printed circuit board. ,
The mechanical component and the printed circuit board can be directly connected by a connector. Moreover, attachment / detachment of the mechanical component to / from the mounting base and connection / disconnection of the connector can be performed simultaneously from the same direction.

〔Example〕

An embodiment in which the present invention is applied to a camera-integrated VTR will be described below with reference to the drawings.

First, referring to FIG. 5, the entire camera-integrated VTR 1 will be described. The camera lens 4 and the viewfinder 5 are attached to the front of the case 3 of the VTR main body 2, and the case 3
The optical block 6 of the camera is attached to the front side of the inside. Further, on the rear surface of the case 3, a battery case 8 containing a battery 7 is attached. Also, case 3
A shoulder pad 9 and a steering handle 10 are attached to the lower surface and the upper surface. The case 3 is provided with a VTR recording / reproducing section and a card board housing section.

Next, referring to FIG. 3 and FIG. 4, the internal structure of the case 3 will be described.

The case 3 is configured as a chassisless case made of a light metal such as a magnesium die cast. The ribs 13 are integrally provided along the inner surfaces of the upper and lower walls 3a and 3b of the case 3 and the inner surfaces of the front and rear partition walls 3c and 3d in the case 3 substantially along the center in the left-right direction. And case 3
Between the inner partition walls 3c and 3d, one side surface side of the rib 13 (right side in FIG. 4) is configured as the recording / reproducing mechanism section 14, and the other side surface side of the rib 13 (left side in FIG. 4) is the control circuit section 15. Is configured.

Then, on both the left and right sides of the rib 13, there are attached mechanical bases,
16 and a mother board 17 formed of a printed circuit board are screwed vertically in a state of being mutually positioned by a positioning means (not shown), and the mother board 17 has a recording / reproducing mechanism section 14 and a control circuit section 15. It is also used as a partition plate that partitions the space in an airtight manner. Incidentally, the inside of the recording / reproducing mechanism section 14 is constructed as a sealed structure as a dustproof measure, and in contrast to this, the inside of the control circuit section 15 is constructed as a structure that can be ventilated for heat dissipation of circuit components.

Then, in the recording / reproducing mechanism section 14, on the mechanical deck 16,
A rotary head drum 18, a pair of reel bases 19, a tape loading mechanism, a capstan and a pinch roller, a cassette mounting mechanism and various other mechanical parts are attached.
Tape cassette 20 attached by the cassette attachment mechanism
It is configured to record and reproduce the cassette tape inside. A tape cassette is attached to one side wall 3e of the case 3.
An opening / closing lid 21 for attaching and detaching 20 is provided.

A plurality of connectors 22 for input / output to / from the recording / reproducing mechanism section 14 are soldered to one side surface (a surface on the recording / reproducing mechanism section 14 side) 17a of the motherboard 17, and the other side surface (control circuit section). A plurality of connectors 23 for connecting the card substrate, a connector 24 for connecting the optical block 6 and the battery 7, and the like are soldered to the surface 15b) 17b. And
In the control circuit section 15, a plurality of card boards 26 made of a printed board are connected to a plurality of connectors 23 and vertically mounted. The optical block 6 and battery 7
Are connected to both connectors 24 by harnesses 25, respectively. A connector 27 directly attached to the rotary head drum 18 and other mechanical parts is directly connected to the connector 22, and the mother board 17 and a plurality of card boards 26 control the recording / reproducing mechanism section 14 and the optical block 6. A control circuit is configured. A plurality of card board insertion guides 28 are provided on the upper and lower sides of the control circuit section 15, respectively, and the plurality of card boards 26 are shown in FIG. From the left side, insert into each pair of upper and lower insertion guides 28 and connect multiple connectors.
Connect to 23.

By the way, as shown in FIG. 4, ventilation ports 30a and 30b as ventilation means penetrating the upper and lower walls 3a and 3b of the case 3 and the shoulder pad 9 are provided above and below the control circuit unit 15. Therefore, the inside of the control circuit unit 15 is always naturally ventilated by the introduction of the outside air from the lower ventilation port 30b and the discharge of the inside air from the upper ventilation port 30a, and the control circuit unit 15 is provided on the motherboard 17 and the plurality of card boards 26. Air cooling of the circuit components that are present is performed.

At this time, however, the recording / reproducing mechanism section 14 and the control circuit section 15 in the case 3 are airtightly partitioned by the mother board 17, so that the control circuit section 15 is mixed with the ventilation air. There is no possibility that dust or the like will enter the recording / reproducing mechanism section 14 and adhere to the cassette tape or the like to cause dropout or the like at the time of recording or reproducing.

Note that, as shown in FIG. 4, it is possible to install a blower 31 or the like in the control circuit unit 15 as necessary to forcibly ventilate the inside of the control circuit unit 15.

Next, referring to FIGS. 1 and 2, an electrical connection structure between the rotary head drum 18, which is one of the mechanical components, and the motherboard 17 will be described.

The rotary head drum 18 includes a fixed drum 33, a rotary shaft 35 rotatably supported in the center of the fixed drum 33 via a pair of ball bearings 34a and 34b, and a plurality of rotary heads (magnetic heads) 36. A rotary drum 37, which is fixed to one end of the rotary shaft 35, and a motor 38 that drives the rotary drum 37.
And a rotary transformer 39 that transmits an electric signal between the fixed drum 33 and the rotating drum 37. The pair of ball bearings 34a, 34b is a central cylindrical portion 3 integrally provided at the center of the bottom portion 33a of the fixed drum 33.
It is attached to both ends in 3b. Further, the motor 38 is arranged in the fixed drum 33, and the bottom portion 37a of the rotating drum 37 is disposed.
The motor rotor 38a is fixed to the rotary drum 37 and is rotated integrally with the rotary drum 37, and the motor stator 38b is fixed to the fixed drum 33. Further, the rotary transformer 39 is arranged inside the motor 38, and includes a transformer rotor 39a fixed to the bottom portion 37a of the rotating drum 37 and rotated integrally with the rotating drum 37, and a central cylindrical portion 33b of the fixed drum 33. It is configured by a transformer stator 39b fixed to the outer periphery. And the bottom of the fixed drum 33
33a is fitted in a through hole 40 that penetrates the mechanical deck 16 in its plate thickness direction (left and right direction in FIG. 1), and a flange portion 33c integrally provided on the outer periphery of the bottom portion 33a has a plurality of screws 41.
It is fixed to the mechanical device 16 by.

By the way, a pair of connectors 27a and 27b are directly attached to the attachment surface side 43 of the rotary head drum 18 to the mechanical deck 16. Both connectors 27a and 27b are fixed drum 33.
It is soldered to a pair of fan-shaped printed circuit boards 45a and 45b fixed to the bottom portion 33a therein, and is projected to the outside from a pair of window holes 46a and 46b provided in the bottom portion 33a. The one connector 27a is electrically connected to the motor stator 38b of the motor 38 via the printed circuit board 45a, and the other connector 27b is electrically connected to the transformer stator 39b of the rotary transformer 39 via the printed circuit board 45b. ing. The transformer rotor 39a of the rotary transformer 39 is electrically connected to the plurality of rotary heads 36 of the rotary drum 37.

When the rotary head drum 18 is attached to the mechanical deck 16 from the right side in FIG.
The pair of connectors 27a and 27b are configured to be directly connected to the pair of connectors 22a and 22b for connecting the rotary head drum provided on the one side surface 17a of the motherboard 17 in the through holes 40 of 16.

If the motor 38 of the rotary head drum 18 and the rotary transformer 39 are directly connected to the connectors 22a and 22b of the motherboard 17 by the connectors 27a and 27b, the motor 38 and the rotary transformer 39 are connected to each other. It can be electrically connected to the motherboard 17 without using a harness or a flexible printed circuit board. Further, attachment / detachment of the rotary head drum 18 to / from the mechanical device 16 and connection / disconnection of the connectors 27a / 27b to / from the connectors 22a / 22b can be performed simultaneously from the same direction.

Moreover, if the connection between these connectors 27a, 27b and 22a, 22b can be made in the through hole 40 penetrating the mechanical device 16 in the plate thickness direction, the motherboard 17 can be mounted very close to the mechanical device 16. .

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments and various effective modifications can be made based on the technical idea of the present invention.

The invention can also be applied to various electronic devices other than recording / reproducing devices such as VTRs and tape recorders.

[Effect of device]

As described above, the electronic device of the present invention uses a harness or a flexible printed circuit board by directly providing the connector on the mounting surface side of the mounting base of the mechanical component that is mounted facing the printed circuit board across the mounting base body. Since the mechanical parts and the printed circuit board can be directly connected by the connector without using the harness and the flexible printed circuit board, the electronic device can be reduced in size, weight and cost. Can be planned. Moreover, since attachment / detachment of the mechanical component and attachment / detachment of the connector can be simultaneously performed from the same direction, the mechanical component can be assembled and disassembled very easily.

Further, in particular, as shown in the embodiment, the connector can be connected in the through hole penetrating the mounting base in the plate thickness direction so that the printed circuit board can be mounted close to the mounting base. If so, it is possible to further reduce the size of the electronic device.

[Brief description of drawings]

The drawings show an embodiment of the present invention.
FIG. 2 is a sectional view of the main part, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 5, and FIG. Fig. 5 is an enlarged sectional view taken along the line IV-IV, and Fig. 5 is a side view of the entire camera-integrated VTR. In the reference numerals used in the drawings, 16 ... Mechanical device (mounting base) 17 ... Motherboard (printed circuit board) 18 ... Rotating head drum (mechanical component) 22a, 22b ... Connector 27a, 27b ... Connector 40 ... … Through hole 43… It is the mounting surface side.

Claims (2)

[Scope of utility model registration request] 1. A pair of mechanical parts and a printed circuit board which are detachably attached to the mounting base body in a direction perpendicular to the mounting base body, and which are inserted into each other in a direction perpendicular to the mounting base body. One of the connectors is directly attached to the attachment surface side of the mechanical component to the attachment base, and the other connector is attached to the printed circuit board, and the mechanical component and the printed circuit board are attached to the attachment base. An electronic device in which the pair of connectors are simultaneously inserted and connected to each other. 2. A structure for mounting the printed circuit board in the vicinity of the mounting base by providing a through-hole penetrating the mounting base in the plate thickness direction and connecting the two connectors in the through-hole. The electronic device according to claim 1, wherein the utility model is registered.