JP2000101207A - Printed circuit board structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printed circuit board structure capable of simplifying assembly and reducing man-hours for production and production costs, by directly performing connection or counter arrangement with external components away from a substrate surface for a prescribed distance. SOLUTION: A power supply input unit 1, a first sensor unit 10, a second sensor unit 11, an operating unit 7 and a high pressure output unit 5a formed on a printed circuit board 12 are held by an elastic jumper line 13 and installed perpendicularly to the substrate surface while being divided and bent from the substrate surface by a dividing line Lb. The first sensor unit 10, second sensor unit 11, operating unit 7 and high pressure output unit 5a are horizontally held by the jumper line 13 while dividing and bending the top ends by the dividing line Lb, and respectively directly connect or oppositely arrange the external parts located above the printed circuit board 12 to an inlet 1a, sensors 10a and 11a, operate signal terminals 8a-8d and high pressure output terminals 6a-6c accurately located and arranged at prescribed positions from the substrate surface. Thus, the production time and production costs are remarkably reduced and the assembly of the printed circuit board with high accuracy is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a printed circuit board structure in which a plurality of circuit units each having a unique function are integrally formed on a common substrate.

[0002]

2. Description of the Related Art A printed circuit board 12A used in a conventional image forming apparatus has a structure as shown in FIG.
A power supply control circuit unit 17 that takes in AC power and supplies various power supplies, an engine control circuit unit 18 that controls basic image forming operations, and a high voltage power supply circuit unit 19 that supplies high voltage power during charging, transfer, and development The power control circuit unit 17 is provided with an inlet 1a for taking in AC power, the engine control circuit unit 18 is provided with optical sensors 20a and 20b, and the high-voltage power supply circuit unit 19 is provided with , High voltage output terminal 19a,
19b is provided.

In the conventional printed circuit board 12A, as shown in FIG. 7, a lead wire 24 for supplying AC power is soldered to the inlet 1a, and the optical sensor 20a moves a recording paper as an object to be detected. Thereby, the opening / closing piece 21a that rotates so as to close the optical path of the optical sensor 20a that is normally open is held and arranged by the support member 22a,
Similarly, in the optical sensor 20b, an opening / closing piece 21b that rotates so as to close the optical path of the optical sensor 20b, which is normally in an open state, by the movement of a recording sheet as an object to be detected is held by a support member 22b. It is arranged. A spring 25 is pressed against the high-voltage output terminal 19a, a voltage is supplied from the high-voltage output terminal 19a to an external component via the spring 25, and a leaf spring 26 is pressed against the high-voltage output terminal 19b. A voltage is supplied to the external component from the high voltage output terminal 19b via 26.

[0004]

In the above-described conventional printed circuit board 12A, for example, in the case of the optical sensors 20a and 20b, an object to be detected is located between the optical sensors 20a and 20b and an object at a predetermined distance. In order to detect the presence / absence, it is necessary to dispose a complicated inclusion including the opening / closing pieces 21a and 21b and the supporting members 22a and 22b. In the high voltage output terminals 19a and 19b, the spring 25 and the leaf spring 2
6, it is necessary to supply a high voltage to an external component located at a predetermined distance from the high voltage output terminals 19a, 19b. In either case, the configuration is complicated, the manufacturing operation is complicated, and a problem occurs in manufacturing cost. .

The present invention has been made in view of the state of connection between a printed circuit board as described above and an external component located at a predetermined distance from the surface of the substrate, or the facing arrangement for a predetermined operation. Its purpose is to directly connect and oppose the external parts at a predetermined distance from the board surface without any intermediary, simplify the assembly work, reduce the number of man-hours and the manufacturing cost, and reduce the pattern at the time of assembly. An object of the present invention is to provide a printed circuit board structure that is not damaged and is robust against external force.

[0006]

According to one aspect of the present invention, there is provided a printed circuit board in which a plurality of circuit units each having a unique function are integrally formed on a common substrate. Wherein at least one of the plurality of circuit units is divided from the printed circuit board, and is held upright as a projecting piece integrally with the printed circuit board, and a plate surface of the projecting piece, or the projecting piece. A unit connection portion is formed on the plate surface of the bent piece, and an external component is connected to the unit connection portion. The projecting piece and the bent piece of the circuit unit are connected and held by an elastic jumper wire. It is characterized by having.

[0007] Similarly, to achieve the above object, a second aspect of the present invention is characterized in that, in the first aspect of the present invention, the elastic jumper wire is a coated elastic jumper wire.

[0008] Similarly, in order to achieve the above object, the invention according to claim 3 is the invention according to claim 2, wherein one end of at least one of the covering elastic jumper wires is formed in a through hole formed in the printed circuit board. Are inserted and arranged.

According to another aspect of the present invention, in order to achieve the above object, the plurality of circuit units may include an engine control circuit of a printer engine. And a DC power supply circuit unit and an AC power supply circuit unit.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the present invention is applied to an image forming apparatus will be described below with reference to FIGS. FIG. 1 is an explanatory plan view showing the configuration of a printed circuit board according to the present embodiment before assembly, FIG. 2 is a front explanatory view showing the configuration of the printed circuit board after assembly according to the present embodiment, and FIG. FIG. 4 is an explanatory diagram showing an example of a jumper wire used, FIG. 4 is an explanatory diagram showing an example of a covering jumper wire used in the present embodiment,
FIG. 5 is an explanatory diagram showing an example of the connection structure of the covering jumper wires according to the present embodiment.

The printed circuit board 12 before assembly according to the present embodiment.
Has a configuration as shown in FIG. 1 and has an inlet 1a on the plate surface of the printed circuit board 12, and a DC power supply unit 1, 24V, 5V, etc., which supplies a DC voltage, such as a power supply input unit 1 to which power supply power is input. A power supply unit 2; an engine control unit 3 for controlling basic image forming operations other than image processing; a high-voltage power supply unit 5 for supplying voltages for charging, transferring, and developing operations of an image forming unit; The high-voltage output unit 5a having the output terminals 6a to 6c is partitioned. Similarly, a first sensor unit 10 having a sensor 10a and a sensor 11
The second sensor unit 11 provided with a, an operation unit 7 for performing an operation operation, and an operation terminal unit 7a provided with operation signal terminals 8a to 8c are sectioned.

A cut line Lb is formed at the boundary between the power input unit 1 and the DC power supply unit 2. The power input unit 1 and the DC power supply unit 2 are resiliently jumped along the division line Lb. The power supply unit 1 is electrically and mechanically connected to each other by a line 13 so that the power supply unit 1 can be separated from the DC power supply unit 2 along the division line Lb. Similarly, a dividing line Lb is formed at the boundary between the high-voltage power supply unit 5 and the high-voltage output unit 5a, and the high-voltage power supply unit 5 and the high-voltage output unit 5a
Are electrically and mechanically connected to each other by an elastic jumper wire 13 so that the high-voltage output unit 5a can be separated from the high-voltage power supply unit 5 along the division line Lb. Further, the high-voltage output unit 5a is configured to be able to be divided into two by a dividing line Lb formed at the center position.

Similarly, a dividing line Lb is formed at the boundary between the first sensor unit 10 and the engine control unit 3, and the first sensor unit 1 is arranged along one dividing line Lb.
0 and the engine control unit 3 are electrically and mechanically connected to each other by an elastic jumper 13.
Along the line b, the first sensor unit 10 is configured to be splittable from the engine control unit 3.

The second sensor unit 11 and the operation unit 7 are arranged adjacent to each other via a division line Lb. A division line Lb is formed at the boundary between the second sensor unit 11 and the engine control unit 3. Along the dividing line, the second sensor unit 11 and the engine control unit 3 are electrically and mechanically connected to each other by an elastic jumper line 13, and along the dividing line Lb,
Can be separated from the engine control unit 3 and the operation unit 7. Further, in the second sensor unit 11, a dividing line lb is formed at a boundary between the tip end portion where the sensor 11a is provided and another portion, and two portions are elastic jumper lines 13 along the dividing line Lb, and the electric lines are electrically connected. In addition, the second sensor unit 11 is mechanically connected to each other, and is configured such that a tip portion can be divided from other portions.

A dividing line Lb is formed at the boundary between the operating unit 7 and the operating terminal unit 7a and the engine control unit 3, and the operating unit 7 and the operating terminal unit 7a are elastically arranged along one of the dividing lines Lb. Jumper wire 1
3, the operation unit 7 and the operation terminal unit 7a are electrically and mechanically interconnected with the engine control unit 3 and are separated from the engine control unit 3 and the second sensor unit 11 along the division line. It is configured to be possible. Further, a division line Lb is formed at the boundary between the operation unit 7 and the operation terminal unit 7a, and the operation unit 7 and the operation terminal unit 7a are electrically and electrically connected by the elastic jumper line 13 along the division line Lb. The operation terminal unit 7a is mechanically connected to each other, and is configured to be separable from the operation unit 7.

In the present embodiment, the power input unit 1,
The length of the first sensor unit 10, the second sensor unit 11, the operation unit 7, and the high-voltage output unit 5a in the direction in which they are divided and started is the height of the connected external components from the surface of the printed circuit board 12 from the plate surface. It is set according to. Also, the inlet 1a of the power input unit 1
Position, the position of the sensor 10a of the first sensor unit 10, the position of the sensor 11a of the second sensor unit 11, the positions of the operation signal terminals 8a to 8d of the operation terminal unit 7a,
The positions of the high-voltage output terminals 6a to 6c and the high-voltage output units 5a are set corresponding to the positions of the external components connected at the respective heights. Furthermore, printed circuit board 1
2, mounted components are mounted in advance by automatic soldering.

Meanwhile, as shown in FIG. 3, the elastic jumper wire 13 used in the present embodiment is formed so as to be wound in a loop shape or bent in a wavy shape to maintain elasticity. This elastic jumper wire 13 includes
The coating 15 can be applied as shown in FIG.

In the present embodiment, as shown in FIG. 2, the separate start-up of each unit and the external The parts are connected or assembled. That is, the power input unit 1 is divided from the DC power unit 2 along the dividing line Lb, bent at a right angle to the plate surface of the printed circuit board 12, held by the elastic jumper wire 13, and the power input line is connected to the inlet 1a by soldering. Connected. Similarly, the first sensor unit 10 is divided from the engine control unit 3 along the division line Lb, is refracted at right angles to the plate surface of the printed circuit board 12, is held by the elastic jumper line 13, and is recorded by an unillustrated recording medium. The leading end portion is divided by a dividing line Lb at a position where the sheet is conveyed so that the sensor 10a can detect the passage of the recording sheet.

The second sensor unit 11 is divided from the engine control unit 3 and the operation unit 7 along a dividing line, is refracted at right angles to the plate surface of the printed circuit board 12, and is held by the elastic jumper line 13. The leading end is divided by a dividing line Lb at a position where the recording paper is conveyed (not shown) so that the sensor 11a can detect the passage of the recording paper, and is disposed in a state where it is held at another portion by an elastic jumper line 13. .

Further, the operation unit 7 and the operation terminal unit 7a are divided from the engine control unit 3 along the division line Lb, bent at right angles to the plate surface of the printed circuit board 12, held by the elastic jumper line 13, and operated. The terminal unit 7a is divided from the operation unit 7 by the division line Lb, and the operation signal terminals 8a to 8d are arranged at predetermined positions and held by the operation unit 7 by the elastic jumper wire 13.

Then, the high-voltage output unit 5a is divided from the high-voltage power supply unit 5 by a dividing line Lb, is refracted at right angles to the plate surface of the printed circuit board 12, and
3, the high-voltage output unit 5a is divided at a substantially central position by a dividing line Lb, and the elastic jumper line 1 is moved so that the high-voltage output terminals 6a to 6c are at predetermined positions.
3 and is disposed.

In this embodiment, the power input unit 1, the first sensor unit 10, the second sensor unit 11, the operation unit 7, and the high-voltage output unit 5a formed on the printed circuit board 12 are divided into dividing lines. Divided from the surface of the printed circuit board 12 at the Lb portion, the elastic jumper wire 1
In the state held by 3, it is bent and rises at right angles to the plate surface of the printed circuit board 12, and the first sensor unit 10, the second sensor unit 11, the operation unit 7, and the high-voltage output unit 5 a are further divided by the dividing line Lb. The inlet 1a, the sensors 10a and 11a, the operation signal terminals 8a to 8d, and the high-voltage output terminals 6a to 6c are respectively separated from the front surface of the It is possible to accurately position and dispose it at a predetermined position at a predetermined height from above, and to connect external components to each of them or to oppose them.

Therefore, according to the present embodiment, the power input unit 1, the first sensor unit 10, the second sensor unit 11, the operation unit 7, and the high voltage output unit 5a formed on the printed circuit board 12 By a simple assembling process, the external components located above the printed circuit board 12 are directly connected with high precision without intermediary members, or are opposed to each other, so that the manufacturing time and the manufacturing cost are greatly reduced. Can be assembled with high accuracy. In addition, since the elastic jumper wire 13 is used, no stress is applied to the land at the time of refraction, and there is no occurrence of an accidental detachment of the send or the pattern, and by applying the coating 15 to the elastic jumper wire 13, the elastic jumper wire 13 is deformed by external force, A short circuit accident at the elastic jumper wire 13 can be completely prevented, and the covering portion can be inserted through the through-hole formed in the printed circuit board 12 to further stabilize the holding.

[0024]

According to the first aspect of the present invention, a plurality of circuit units each having a unique function are integrally formed on a common printed circuit board, and at least one of the plurality of circuit units is printed. Divided from the board,
An external component is connected to a unit connecting portion formed on the printed circuit board as a protruding piece integrally formed as a protruding piece, or on a plate surface of the protruding piece or on a plate surface of a bent piece obtained by bending the protruding piece, thereby connecting a circuit unit. The projecting pieces and bent pieces are connected and held by elastic jumper wires, so that the unit connection portion with the external component of each circuit unit can be easily positioned and arranged at a predetermined coordinate position above the printed circuit board, and the unit External parts can be easily and accurately connected directly to the connecting parts without the intervention of connecting members. The entire structure is also flexible and rigid with elastic jumpers, and the lands and patterns at the time of assembly are flexible. Is not damaged, and the manufacturing cost can be reduced.

According to the second aspect of the present invention, in addition to the effect obtained by the first aspect of the present invention, since the elastic jumper wire is a coated elastic jumper wire, it is possible to completely prevent a short-circuit contact of the jumper wire due to external vibration or the like. Can be prevented.

According to the third aspect of the invention, in addition to the effect obtained by the second aspect of the invention, at least one end of the coated elastic jumper wire is inserted and arranged in a through hole formed in the printed circuit board. Therefore, it is possible to more stably hold the coated elastic jumper wire without displacement.

According to the fourth aspect of the present invention, a plurality of circuit units including the engine control circuit unit, the DC power supply circuit unit, and the AC power supply circuit unit of the printer engine are obtained by the invention according to the first aspect. The effect obtained is realized.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view illustrating a configuration of a printed circuit board before assembly according to an embodiment of the present invention.

FIG. 2 is an explanatory front view showing a configuration of a printed circuit board after assembly according to the embodiment;

FIG. 3 is an explanatory diagram showing an example of a jumper line used in the embodiment.

FIG. 4 is an explanatory diagram showing an example of a covering jumper wire used in the embodiment.

FIG. 5 is an explanatory diagram showing an example of a connection structure of the covered jumper wires according to the embodiment.

FIG. 6 is an explanatory plan view showing a configuration of a conventional printed circuit board before assembly.

FIG. 7 is an explanatory front view showing a configuration after assembling a conventional printed circuit board.

[Description of Signs] 1 power input unit 1a inlet 2 DC power unit 3 engine control unit 5 high voltage power unit 5a high voltage output unit 6a to 6c high voltage output terminal 7 operation unit 7a operation terminal unit 8a to 8d operation signal terminal 10 first sensor Unit 11 Second sensor unit 10a, 11a Sensor 12 Printed circuit board 13 Elastic jumper wire

Claims (4)

[Claims] 1. A printed circuit board structure in which a plurality of circuit units each having a unique function are integrally formed on a common substrate, wherein at least one of the plurality of circuit units is a printed circuit board. And a unit connecting part is formed on the plate surface of the protruding piece, or on the plate surface of the bent piece obtained by bending the protruding piece, and is unitarily formed on the printed circuit board as a protruding piece. An external component is connected to the unit connection portion, and the projecting piece and the bent piece of the circuit unit are connected and held by an elastic jumper wire. 2. The printed circuit board structure according to claim 1, wherein said elastic jumper wire is a coated elastic jumper wire. 3. The printed circuit board according to claim 2, wherein one end of at least one of the covering elastic jumper wires is inserted through a through-hole formed in the printed circuit board. Construction. 4. The printed circuit board structure according to claim 1, wherein said plurality of circuit units are an engine control circuit unit of a printer engine, a DC power supply circuit unit, and an AC power supply circuit unit. A printed circuit board structure comprising: