JPH02242527A - Movable power supply cable - Google Patents

Abstract

PURPOSE:To prevent electricity feeding from being disabled, and prevent heat radiation or firing so as to enhance the durability of the feeder cable by providing a protecting member along the outside of the curved face of a flexible printed board. CONSTITUTION:A feeder cable 10 comprises wires 1, 1, a connector 2, 2 for connecting the end portions of the wires 1, 1 to respective end portions of an FPC 3 which is printed only at its one face, connecting terminals 4, 4 and 5 for connecting the other end portions of the wires 1, 1 to a power source portion and an exposure lamp, respectively, and a protecting member 6 provided parallel to the FPC 3 and being longer than the FPC 3. Attachment of the protecting member 6 is thereby simplified and ensured and, even when the FPC 3 is shifted with the shift of the moveable body, the protecting member 6 provided along the outside of the curved face of the FPC 3 makes sliding contact with the burr and angles of the fixed portion so as to protect the FPC 3. There will thus be no danger of interruption of electricity feeding, heat generation or firing which may be caused by breakage of the pattern of the FPC, and so the durability of the feeder cable can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention mainly relates to a power supply cable for movable bodies such as copying machines and optical reading devices.

[Conventional technology]

2. Description of the Related Art In a duplicator or document reading device with a fixed document table, a power supply cable for supplying power to a movable body such as an exposure lamp provided in an optical scanner section is required to be highly flexible and durable.

Therefore, flexible pudding 1 with excellent properties
One substrate (hereinafter referred to as rFPCJ) is generally used.

Figure 14 shows the conventional FI-'C terminal processing method.
- An example is shown in which one end of the FPCIO I is lined with a printed board 102, and an electric wire 104 with one end connected to the connector 103 is inserted through the printed board 102.
The PC1O4 and the electric wire 104a (see FIG. 15) were directly soldered, and the end portion of the electric wire including the soldered portion 105 was covered with a heat shrink tube 106 for insulation.

Fl) A car F 108 is attached to one side of the CIOI using double-sided tape 107, as shown in detail in Fig. 15, to reinforce the FPCIOI and to attach the FP by sliding contact with other parts.
Prevents damage to Clor.

Similarly, attach printed board 1 to the other end of Fpc 101.
02', solder the terminal part of the electric wire 104' connected to the connection terminal 103' and the FPCIOI, and wrap the terminal part of the electric wire including the soldered part 105' in a heat shrink tube 1.
06'.

The electric wire 104 is connected to a movable part (not shown) via the connector 103, and the electric wire 104' is connected to a power supply part (not shown) via the connection terminal 103'.

FIG. 16 shows another example of the conventional FPC terminal processing method, in which printers 1 to 1 are placed at both ends of the FPCll.
The plates 112 and 112' are lined with each other, and board connectors 113i13' are soldered to the terminal parts 115 and 112', respectively.
It is soldered at 115'.

On the other hand, harness connectors 116 and 116' are respectively fixed to the terminal parts of the electric wires 114i14', and these harness connectors 11E3 and 11B' are connected to the board connector 1.
1''S, 113' to supply power to the movable part from a power source (not shown).

[Problem to be solved by the invention]

However, in such conventional power supply cables for movable parts, as the movable part moves, the curved outer surface of the FPC comes into sliding contact with the edges, corners, screws, etc. of the sheet metal of the fixed part, and the pattern of the FPC There is a risk of power supply not being possible due to a complete disconnection of the cable, or heat generation or ignition due to a reduction in the conductor width due to a partial disconnection, which not only significantly shortens the life of the power supply cable, but also poses a safety problem.

Furthermore, for reasons of cost, FPC printed only on one side is usually used for power supply cables for moving objects, rather than printed on both sides. When using such FI-'C to supply power to a moving body through a connector that can be electrically connected only on one side, if the power supply cable is bent into a U-shape, the front and back of the FPC will be reversed,
Therefore, there was a problem in that the connector had to be turned upside down and attached to the moving body, or the FPC had to be twisted once.

It is an object of the present invention to solve these conventional problems and provide a power supply cable for a movable body that has an extremely simple structure and is excellent in durability and safety.

[Means to solve the problem]

In order to achieve the object stated in item 1 above, a power supply cable for a movable body according to the present invention is a power supply cable for a movable body that curves and connects a power supply wire and a movable body via a flexible printed circuit board. A protective member is provided along the outside of the curved surface, and both ends of the protective member are attached to connectors that connect the electric wire and the FPC.

Preferably, the protective member can be attached to either the front or back side of the connector.

Furthermore, it is also possible to attach both the protection member and the FPC to the same attachment part of the connector.

[For production]

By configuring as described in item 1, the protective member can be installed easily and reliably, and even if the FPC moves with the movement of the movable body, it can be installed along the outside of the curved surface of the FPC,
Since this protective member slides into contact with the edges and corners of the fixed part and protects the FPC, there is no risk of power supply failure, heat generation, or fire due to disconnection of the FI)C pattern, greatly improving the durability of the power supply cable. ”

Furthermore, if the protective member can be attached to both the front and back sides of the connector, it is convenient because even when the connector is attached with the front and back reversed, the terminal portion of the protective member can always be attached from the same direction.

Furthermore, a protective member and FPC are attached to the same mounting part of the connector.
If both are installed together, there is no need to provide separate attachment parts for both on the connector, which simplifies the structure of the connector and significantly improves the workability of assembling the power cable. Become.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to a power supply cable for an exposure lamp provided in an optical system scanner of a copying machine will be described with reference to FIGS. 1 to 13 of the accompanying drawings.

FIG. 10 schematically shows the optical system of a conventional copying machine with a fixed document table. Below the contact glass 41 that constitutes the document table, there is an exposure lamp 43 equipped with a reflector 42 and a first mirror. 44 is a movable body shown in FIG.
A second mirror 46 and a third mirror 47 are attached to a second scanner 48 and are driven by a scanner motor 49 and a scanner wire 51 to reciprocate in the direction of the arrow to scan the original on the contact glass 41. scan.

A bottom plate 60 is provided below the first scanner 45 and the second scanner 48, and the bottom plate 60 partitions the upper optical system unit from the lower image forming section such as a photoreceptor.

In addition, in order to supply power to the exposure lamp 4B provided in the first scanner 45, a power supply cable 50 is bundled together with a signal optical fiber 52 and connected to a power supply section as shown in FIGS. 12 and 13. ing.

FIG. 1 shows an embodiment of the present invention.

+i(+electrical cable 10 according to this invention is an electric wire 1°1
, connectors 2, 2 are connected to both ends of the FP printed on only one side, and the other ends of the electric wires 1, 1 are connected to a power supply section and an exposure lamp (not shown), respectively. Connection terminals 4, 4 and 5 connected to the FPC
, ; and a longer protective member 6 provided in parallel with the protective member 6 .

As shown in FIG. 2, the electric wire 1 has a terminal 12 fixedly provided with an elastic contact piece 11 at its terminal end.
A semi-cylindrical contact portion 11a and a protrusion 11b for preventing disconnection are formed on the holder.

As shown in detail in FIGS. 2 and 3, the connector 2 consists of a flat box-shaped housing 21 and a locking member 22 that can be inserted and removed from one end of the housing 21. .

The housing 21 has an opening 21a into which the contact piece 11 of the terminal 12 fixed to the end of the electric wire 1 can be inserted, an opening 21b into which the locking member 22 can be inserted, and a protrusion 11b of the contact piece 11 that engages with the opening 21a. A locking portion 21c that prevents the extraction of the locking portion 21c, and an F to be described later.
A locking protrusion 21d that can be fitted into the locking hole 2ia (see FIG. 4) of P(,;; and a protrusion 21e having elasticity that acts as a retainer when the locking member 22 is inserted, as shown in FIG. 3). , is provided with a screw hole 21f that vertically penetrates the housing 21, and positioning pins 21g protruding from corresponding positions on both the front and back surfaces of the housing 21, while the FPC 2 is inserted into the locking member 22. It is provided with a slit 22a that can be used.

In addition, these screw holes 21f and positioning pins 2
The number of connectors 1g is not limited to one, but may be a plurality of connectors, and the shape of the connector 2 is preferably symmetrical when viewed from the direction of insertion of the FPC 3 (arrow A).

By doing this, even if the front and back of the connector are reversed when installing the connector, it is possible to always screw from the same direction, and even if there is a bottom hole 60 shown in Figure 8 below, the screw can be secured Work will not be interrupted.

On the other hand, as shown in FIG. 4, FPC 2; has a thin backing member 31 such as a polyester film attached to both ends to improve workability when inserting the extremely thin and flexible FPC into Surins 1 to 22a. , it also serves to reinforce the locking holes 6a provided at both ends of the FPC 3.

Inside the FPC 3, two conductor portions ``i2a, 32b'' are buried with a distance t of 3 awn or more, and each conductor portion ``i2a'', ``i2b'' has an exposed conductor portion 33a plated with solder at both ends. , 33b.

Further, as shown in FIG. 5, the protective member 6 is provided with through holes 6a and 3b symmetrically vertically and horizontally in the figure, corresponding to the screw holes 21f and the positioning pins 21g of the connector 2, respectively, at both ends. The material is made of a flexible flame-retardant material such as polyimide.

Since this embodiment has the above configuration, with the locking member 22 removed from the housing 21, the electric wire 1 is inserted through the opening 218 of the housing 21, and the slit of the locking member 22 is inserted through the opening 21b. FP with 22a inserted
C";, the protruding piece 11b of the contact piece 11 on the wire 1 side
At the point where the electric wire 1 passes over the protrusion having the locking part 21c of the housing 21, its tip engages with the locking part 21c, and locks the electric wire 1 so that it cannot be pulled out.

Once the locking hole 3a on the FPC"i side fits into the locking protrusion 21d on the housing 21 side, the FPC 3 is prevented from being pulled out. When the locking member 22 is inserted into the housing 21 in this state, The fitting between the protrusion 21d and the hole 3a becomes more secure, and the FPC filter is pressed downward as shown in FIG. 2, thereby exposing the conductor portion 33a.

The contact portion 11a of the contact piece 1A corresponds to the plating layer of the filter 3b.
are bitten into each other to ensure contact between the two, and at the position where the locking member 22 has been inserted for a predetermined length, the protrusion 21 on the housing 21 side
Q is locked to prevent its removal.

FIG. 6 shows a state in which the connector 2, in which the electric wire 1 and the FPC 3 are electrically connected in this manner, is attached to a copying machine.

In this case, the FP C3 is turned 180 degrees in the middle, and one connector 2 is attached to the optical system base 53, and the other connector 2 is attached to the moving first scanner 45 through the screw fixing hole 21f. 7, and one of the positioning pins 21g provided on both the front and back surfaces of the housing 21 is fitted into the positioning holes 5ESa and 45a provided on the optical system base 53 and the first scanner 45, respectively, and firmly fixed. be done.

In addition, with the through hole 6b of the protective member 6 fitted into the positioning pin 21g of the connector 2 and the through hole 6a aligned with the screw fastening hole 21f of the connector 2, the protective member 6 is secured to the connector 2 with double-sided tape or the like. Attach the FP (,;; to the optical system base 53 and the first
It follows the outside of the curved FPC when attached to the scanner 45.

When the first scanner 45 moves back and forth in the direction of the arrow in this state, the bent portions of the FPC 3 and the protection member 6 move left and right in the figure, and power is supplied to the exposure lamp 43 (10th time) provided on the first scanner 45. be done.

Next, FIGS. 7 to 9 show other embodiments of the present invention.

In this embodiment, FPC3; longer protection member 1
As shown in FIG. 7, the shape of the end portion of the FPC 3 is changed to be similar to the shape of the end portion of the FPC 3 shown in FIG. 4, and locking holes 16a are provided at both ends.

The end portion of the protective member 1 formed in this way and the end portion of the ppc 3 are overlapped with the locking hole 18a and the groove a almost aligned, and the slit 22 of the locking portion +422 of the connector 2 is inserted as shown in FIG. When inserted into the housing 21 through the opening 21b, the locking hole 6a on the FPC side will open.
and the lock hole 16a on the protection member 16 side are both connected to the housing 21.
It fits into the locking protrusion 21d on the side and prevents both from being pulled out.

When the locking member 22 is inserted into the housing 21 in this state, the fitting between the protrusion 21d and the locking holes 3a and 16a becomes even more reliable, and the locking member 22 is firmly fixed.

FIG. 9 shows the external appearance of the power supply cable assembled in this manner. According to this embodiment, there is no need to separately provide locking protrusions for the FPC 3 and the protection member 16 on the connector 2 side. , the structure of the connector 2 can be simplified and the ease of assembly can be further improved.

In addition, in these embodiments, the member filter 1 lining both ends of the FPC 3 can be made of a material with a different color from the FPC; or it can be colored in a different color. The identification of the backing member 31 becomes very clear during the assembly work.

Therefore, if the backing member 31 side is always positioned on the lock portion 22 side of the connector 2 during assembly, work errors such as incorrectly inserting the FPC 3 from the housing 21 side of the connector 2 can be prevented. I can do it.

Further, the holes 3a and 16a provided at both ends of the FPC and the protective portion 16 may be replaced with notches that can fit into the locking protrusion 21d on the connector 2 side, and the conductor portion 32a provided on the FPC 3. , 32b is not limited to two articles, and may be more than that.

Further, in the embodiment described in -J-, the present invention was explained for the case where power is supplied to an exposure lamp provided in an optical system scanner of a copying machine, but the present invention is not limited to this, and the present invention is not limited to this, but can be applied to an optical reading device or a 1-cut printer. F to moving parts such as the head of
``It can be used without any problems even when power is supplied using a PC.

〔Effect of the invention〕

As described above, according to the present invention, since the protective member is provided along the outside of the curved surface of the FPC, even if the FPC moves with the movement of the movable body, the protective member does not cover the fixed part. The FPC will not come into direct sliding contact with the edges or corners of the fixed part, and there will be no risk of the pattern breaking due to the FPC coming into direct contact with these areas.This will also prevent failure to supply power, heat generation, or fire, thereby increasing the durability of the power supply cable. It can greatly improve your sexuality.

Since the terminal parts of this protection system are attached to the connectors that connect the FPC and the electric wires, the protection members can be easily and reliably attached.

In addition, by making it possible to attach the protective member to both the front and back sides of the connector, it is convenient to be able to always attach the terminal part of the protective member from the same direction even when the connector is installed with the front and back reversed. .

Furthermore, by attaching the protective member and the FPC to the same attachment part of the connector, the structure of the connector can be simplified and the ease of assembly can be significantly improved.

[Brief explanation of drawings]

Fig. 1 is a front view showing one embodiment of the present invention, Fig. 2 is a sectional view showing the structure of a connector that connects the electric wire and FPC, and Figs. 3 (a), (b), and (c) are 4(a) and 4(b) are a plan view and a side view showing an example of an FPC; FIG. 5 is a plan view showing an example of a protective member; Figure 6 is a front view showing how the power supply cable according to the present invention is attached to an actual machine, Figure 7 is a plan view showing an example of a protective member in another embodiment of the present invention, and Figure 8 is a diagram showing how the power supply cable is attached to the connector. 9 is a front view showing the entire assembled state; FIG. 10 is an optical path diagram of the optical system of a copying machine to which the present invention is applied; FIG. 11 is the optical system. Perspective view showing the scanner section, 12th
The figure is a perspective view showing the normal power supply cable attached to the optical system scanner section, Figure 13 is an exploded perspective view thereof, Figure 14 is a front view showing an example of a conventional power supply cable, and Figure 15 is the 13 A front view showing an enlarged view of the stomach shown in Fig. 1.
FIG. 6 is a front view showing another example of a conventional power supply cable. 1...Electric wire 2...Connector 3...Flexible printed circuit board 1~board (FPC) 4.5...Connection terminal 6, 16--protective member 10 Power supply cable
11... Contact piece 12/terminal 21...
Connector housing 22...Connector locking member 31...FPC lining member 32a+ 32b-Conductor portion'33a, 33b Conductor exposed portion

Claims (1)

[Scope of Claims] 1. A power supply cable for a movable body that curves and connects a power supply wire and a movable body via a flexible printed circuit board printed only on one side, the cable being connected along the outside of the curved surface. A power supply cable for a movable body, characterized in that a protection member is provided, and both ends of the thin insulation member are attached to a connector that connects the electric wire and the flexible board. 2. The power supply cable for a movable body according to claim 1, wherein the protective member can be attached to either the front or back side of the connector. 3. The power supply cable for a movable body according to claim 1, wherein the protection member and the flexible printed circuit board can be attached to the same attachment part of the connector.