JPH02106361A - Printed board - Google Patents

Abstract

PURPOSE:To reduce an electronic device in side and to simplify its assembling work by providing a printed board having two or more circuit groups for placing electronic components, and a conductive member bridged between dividers bending or cutting the groups. CONSTITUTION:A junction jumper 16 for bridging dividers 15 between PCBs 13 and 14 formed by dipping in a solder layer is attached to the PCBs 13, 14 by inserting various types of circuit elements 12, 17 to a printed board. The PCB 14 is bent in a direction of an arrow A to be divided at the divider 15 as a boundary, and attached to a PCB mounting plate 19 provided at a printing head 18. Since the PCBs 13, 14 are connected by the jumper 16, it is not necessary to connect the PCBs 13, 14 therebetween by a connector, leads, integrally mounted simply, and the head 18 can be reduced in size by mounting the relatively low element 12 on the PCB 12 and the relatively high element 17 on the PCB 14.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a printed circuit board used in various electronic devices.

[Prior Art] Printed circuit boards are currently one of the essential parts for mounting various circuit elements for controlling electronic equipment. It is common for a plurality of printed circuit boards to be used in one electronic device.

FIG. 5 shows the arrangement of three printed circuit boards used in a print head section of a liquid crystal printer, which will be described later. Moreover, FIG. 6 shows a schematic cross-sectional view of FIG.
The figure shows a side view of FIG.

A print head 1 used in a liquid crystal printer is a device that exposes a photoreceptor (not shown) inside the liquid crystal printer to light based on image data. This device selectively transmits light emitted from a halogen lamp (not shown) through the imaging lens array 4 and exposes the photoreceptor to the light. This print head 1 has three printed circuit boards (hereinafter P
5 to 7 (indicated by CB) are used. This PCB5~
7 is attached to the lamp unit 8 and head base 9 together with the above-mentioned liquid crystal shutter 2, light transmission rod 3, and imaging lens array 4, either directly or via spacers 10a, 10b, etc.

The PCB 5 is a circuit board for controlling the operation of the print head 1, and is equipped with a large number of necessary circuit elements, for example controlling the light amount of a halogen lamp and controlling the temperature of the liquid crystal shutter 2. PCB6 and 7 are LCD shutter 2 and heat seal 6
This is a board on which a circuit element is attached, which is connected to the micro-shutter via the micro-shutter. The PCBs 5 to 7 are electrically connected to each other by connectors, lead wires, etc. (not shown), and signals are exchanged. Such PCB attachment is not limited to the print head 1, but is similarly performed in devices within other electronic devices.

[Problems with conventional technology]

In recent years, electronic devices have tended to become smaller, and for example, the above-mentioned liquid crystal printers are also required to be smaller. For this reason, it is necessary to construct the print head 1 etc. compactly, and for example, the following problems occur when mounting the PCBs 5 to 7 as described above.

b) As particularly shown in FIGS. 5 and 7, when a high-height (large-outline) circuit element (for example, an electrolytic capacitor) 11 is mounted (mounted) on the PCBS, the print head 1 is The print head is not covered by the case.
The external size of the printer itself becomes larger, which goes against the trend of miniaturization of liquid crystal printers.

Since the three PCBs 5 to 7 are each individually attached to a predetermined position of the liquid crystal head 1, it takes time to attach the PCBs 5 to 7, making it impossible to assemble the print head 1 efficiently.

The above problems are not limited to liquid crystal printers (print heads) but also exist in other electronic devices.

[Object of the Invention] In view of the above-mentioned conventional drawbacks, the present invention provides a PCB that makes it possible to miniaturize electronic equipment and simplify assembly work.
The purpose is to provide

[Key points of the invention]

According to the present invention, the above object is achieved by
This is achieved by providing a printed circuit board that includes the above circuit groups, dividing portions for bending or cutting each of the circuit groups, and a conductive member bridged between the dividing portions.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The PCB of this embodiment and the PCB manufactured by the PCB manufacturing method are used by being attached to the print head 18 of a liquid crystal printer 34 shown in FIG. 2, which will be described later.

FIG. 1 is a diagram showing a state in which two PCBs attached to a print head are manufactured as one piece. These two PCB1
Attached to 3.14 are circuit elements for controlling the operation of the print head 18 and circuit elements for controlling opening and closing of the micro shutter. Also, PCB13.14 has PCB13,1
A relay jumper 16 is attached to bridge the divided portion 15 between the four. These two PCBs] 3 and 14 are integrally formed by cutting out the dividing part 15 and installing various types of resistors, capacitors, ICs, etc. shown in Figure (a) on a large printed board with printed wiring and numerous holes. It is created by inserting the circuit elements 12 and 17 and, for example, dipping them into a solder layer. PCB13.14 created in this way is
For example, when installing the print head 18 in Figure (b),
Fold B 14 in the direction of arrow A, and connect the PC with the dividing part 15 as the border.
B13. Divide (divide) 14. As shown in FIG. 1(b), the PCB mounting plate 1 provided on the print head 18
Attach to 9. At this time, PCB 13 is PCB mounting plate 19
The PCB 14 is fastened to the PCB mounting plate 1 through the spacer 20 by the oak 1-21' (see FIG. 3, which will be described later).
9 with screws 21.

FIG. 3 is a perspective view of the print head 18 with the PCBs 13, 14 attached. As shown in Fig. 1(b) and Fig. 3, both PCBs 13 and 14 are connected by relay jumper 16, so there is no need to connect each PCB 13 and 14 with connectors or lead wires after division. As mentioned above, it can be easily installed in one piece.

Further, the print head 18 used in this embodiment has an internal structure shown in FIG. That is, the print head consists of a light source unit 22 and a head base 23, and is connected to the above-mentioned PCB.
13 and 14 are covered with a cover 24 to prevent dust from entering. A light transmission rod 26 is provided in the light source unit 22 for irradiating light from a halogen lamp (not shown) to the liquid crystal shutter panel 25, and a micro shutter (not shown) formed in the liquid crystal shutter panel 25 is provided in the head base 23. An imaging lens array 27 on which the transmitted light enters is fixed by a spacer 28 under pressure. Also,
A TAB film 29 to which a micro-shutter drive circuit 29a is attached is connected to one end of the liquid crystal shutter panel 25. The other end of this TAB film 29 is the relay board 3
0, and the relay board 30 and the above-mentioned PCB 13 are connected by connectors 31, 32 and lead wires 33.

Therefore, the print head 18 has a configuration in which the TAB film 29 is disposed on the left side of the liquid crystal shutter panel 25 (with respect to FIG. 4), and the relay board 30 is further disposed on the left side.
Therefore, a large space B is formed at the upper left side of the print head 18. In this embodiment, print head 1
As shown in FIG. 1(b), a large space B is effectively utilized by arranging a tall (large size) circuit element 17 on a PCB 14 attached to the left side of the PCB 8.

Further, by arranging the circuit element 12 having a low height (small size) on the PCB 13, the print head 18 can be configured to be small. Therefore, as shown in FIG.
When the print head 18 described above is arranged together with the charger 36, developer 37, transfer device 38, and cleaner 39 near the circumferential surface of the photoreceptor drum 35 in the photoreceptor drum 35, the print head 18 is configured to be small as described above. For example, the height of the liquid crystal printer 34 can be reduced, and the size of the liquid crystal printer 34 can be reduced.

The liquid crystal printer 34 uses a paper feed roller 40 to transport the paper in the paper cassette 41 toward the transfer device 38, and the transfer device transfers, for example, a toner image formed on the photoreceptor drum 35 onto the paper. , a fixing device 42 thermally fixes the toner image onto a sheet of paper to form an image.

As described above, in this embodiment, the relatively low-height circuit element 12 is mounted on the PCB 13, and the high-height circuit element 17 is mounted on the PCB 14, so that the space within the print head 18 can be effectively utilized as described above. The head 18 can be made smaller. In addition, by manufacturing two PCBs 13 and 14 as one piece using the relay jumper 16 as in this embodiment, the printed circuit board can be used efficiently.

In this embodiment, the divided portion 15 is split as described above, but it may be bent. Further, in this embodiment, the PCB 13.14 is used as the print head 1 of the liquid crystal printer 34.
Although an example in which the present invention is applied to the print head 18 is shown, it is of course applicable to other devices that require high-density packaging and miniaturization, such as the print head 18 described above.

〔Effect of the invention〕

As described above in detail, according to the present invention, electronic devices such as liquid crystal printers can be downsized.

Furthermore, the PCB can be easily attached to the device, and assembly work can be easily performed.

In addition, PCs that are split or bent in advance with relay jumpers
By connecting PCBs, there is no need to use connectors, lead wires, etc. for electrical connections between PCBs, and costs can be reduced by reducing the number of parts.

[Brief explanation of drawings]

FIG. 1(a) is a diagram illustrating a method for manufacturing a PCB according to an embodiment, FIG. Fig. 2 is a schematic configuration diagram of a liquid crystal printer equipped with the above print head, Fig. 3 is a perspective view of Fig. 1 (b), Fig. 4 is a schematic sectional view of the above print head, and Fig. 5 is a FIG. 6 is a perspective view of a conventional print head, FIG. 6 is a schematic sectional view of the conventional print head, and FIG. 7 is a configuration diagram showing a state in which a PCB is attached to the conventional print head. 12.17...Circuit element, 13.14...PCB. 15...Division part, 16...Relay jumper, 18...Print head, 19...PCB mounting board, 20...Spacer, 21...Screw, 21'...Nut. Patent applicant: Casio Computer Co., Ltd.

Claims (3)

[Claims] (1) A printed circuit board having two or more circuit groups on which electronic components are mounted, a dividing portion for bending or cutting each circuit group, and a conductive member bridged between the dividing portions. (2) A divided part that can be bent or cut into a single board in advance so that it can be attached in accordance with the shape of a predetermined installation part, and two or more circuits on which electronic components are mounted with the divided part as a border. 1. A method of manufacturing a printed circuit board, characterized in that the divided portions are bent or cut after connecting the circuit groups with a conductive member. (3) A printed circuit board is used that has two or more circuit sections on which electrically conductive members are bridged between bent or cut divided sections and electronic components of different sizes are mounted, and a small circuit element is used in the printed circuit board. The circuit section mounted with the large circuit element is provided in the first arrangement section, which has a narrow arrangement space, and the circuit section, which carries the large circuit element, is provided in the second arrangement section, which has a large arrangement space. electronic equipment.