JP2006116764A - Electronic equipment - Google Patents

Abstract

An object of the present invention is to improve durability of a signal cable and prevent occurrence of disconnection.
A first structure including an electronic circuit, a second structure that movably supports the first structure, a signal cable connected to the electronic circuit, and a signal cable are held. A third end having a first end portion, a second end portion brought into contact with the first structure body, and a support shaft portion swingably engaged with the second structure body And a clamp member composed of a portion. Then, the clamp member is swung around the support shaft portion as a swing center as the first structure moves. In this case, even if the first structure is moved in the vertical direction, the wiring configuration of the single-core cable portion can be maintained, and no mechanical stress is applied to the single-core cable portion.
[Selection] Figure 1

Description

  The present invention relates to an electronic device.

  Conventionally, for example, in an electronic device such as a printer, a copier, a facsimile machine, and a multifunction machine, the flat cable is connected to another electronic device, a host device, a network, and the like. If stress is applied, stress may concentrate on the flat cable and breakage may occur. Therefore, a reinforcing plate is provided on the flat cable to prevent stress concentration or to disperse the stress, thereby improving the durability and reliability of the flat cable.

The reinforcing plate is adapted to bring the double-bend bent state deformation at one location of the flat cable closer to the single-bend bent state deformation at two locations of the flat cable as the movable portion reciprocates. Arranged. In addition, the said reinforcement board shall have a certain amount of elasticity, and shall have flexibility smaller than a flat cable (for example, refer patent document 1).
JP-A-6-55804

  However, in the conventional electronic device, as the processing speed increases and the density increases, the data transmission speed increases and the density increases, and it becomes difficult to reliably transmit the data with the flat cable. . Therefore, a signal cable is used in which a plurality of single-core cables are wound together and the shield network wires and the covered tube are covered with each single-core cable.

  Further, as the electronic device is downsized and the mounting density of the components inside the electronic device is increased, the mounting space of the structure including the electric circuit connected to the signal cable is reduced. Therefore, it is necessary to use a small connector, but when using a small connector, the shielded wire of the signal cable and a part of the covering tube must be peeled off, and a plurality of single-core cables must be separated and wired to the connector. I must. Therefore, the signal cable is covered with the shield mesh wire and the covered tube, and the portion with high bending rigidity, that is, the covered portion, and the shield mesh wire and the covered tube are peeled off, and the portion with low bending rigidity, that is, a single core. A cable portion is formed. As a result, when the movable part moves, mechanical stress is applied to the single-core cable part, the durability of the signal cable is lowered, and a disconnection occurs.

  An object of the present invention is to provide an electronic device that solves the problems of the conventional electronic device, improves the durability of the signal cable, and prevents the disconnection.

  Therefore, in the electronic device of the present invention, a first structure including an electronic circuit, a second structure that movably supports the first structure, and a signal connected to the electronic circuit A cable, a first end holding the signal cable, a second end abutted against the first structure, and a swingable engagement with the second structure And a clamp member comprising a third end portion provided with a support shaft portion.

  The clamp member is swung with the support shaft portion as a swing center as the first structure moves.

  According to the present invention, in an electronic device, a first structure including an electronic circuit, a second structure that movably supports the first structure, and a signal connected to the electronic circuit A cable, a first end holding the signal cable, a second end abutted against the first structure, and a swingable engagement with the second structure And a clamp member comprising a third end portion provided with a support shaft portion.

  The clamp member is swung with the support shaft portion as a swing center as the first structure moves.

  In this case, since the clamp member is swung around the support shaft portion as the first structure moves, even if the first structure is moved in the vertical direction, the single core is moved. The wiring form of the cable portion can be maintained.

  Therefore, even if the first structure moves, no mechanical stress is applied to the single-core cable portion, so that the durability of the signal cable can be improved and the occurrence of disconnection can be prevented. .

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this case, a color printer as an electronic apparatus will be described.

  FIG. 1 is a diagram showing a printer according to a first embodiment of the present invention.

  As shown in the figure, a paper feed cassette 11 as a medium accommodating portion for accommodating a recording medium (not shown) is disposed at the lower part of the apparatus main body, and the recording media are separated and fed one by one into the paper feeding cassette 11. A paper feed mechanism for paper is provided. The paper feed mechanism includes paper feed rollers 12 a and 12 b and a separation roller 13, and the recording medium fed by the paper feed mechanism is sent to a transport roller unit 14 disposed in the upper part. The recording medium sent out from the transport roller unit 14 is sent to the transport roller unit 15 and then transported by the transport belt 17 as the transport belt 17 as the transport member travels, and yellow, magenta, Passing between a plurality of image forming units 16Y, 16M, 16C, 16Bk that perform image formation of each color of cyan and black and transfer rollers 51Y, 51M, 51C, 51Bk as transfer devices, the transfer rollers 51Y, 51M, 51C and 51Bk use toner images as visible images of respective colors formed by the photosensitive drums 52Y, 52M, 52C, and 52Bk as image carriers in the image forming units 16Y, 16M, 16C, and 16Bk on a recording medium. Transfer to form a color toner image.

  Subsequently, the recording medium is sent to the fixing device 18 where the color toner image is fixed on the recording medium, and a color image is formed. The recording medium discharged from the fixing device 18 is transported by the transport roller 19 and then discharged from the apparatus main body by the discharge transport roller 20.

  In each of the image forming units 16Y, 16M, 16C, and 16Bk, each of the LED units 21Y, 21M, 21C, and 21Bk as an exposure device is used to form an electrostatic latent image on the photosensitive drums 52Y, 52M, 52C, and 52Bk. The image forming units 16Y, 16M, 16C, and 16Bk are arranged so as to face each other, and are movably supported by the holders 22Y, 22M, 22C, and 22Bk. Each of the LED units 21Y, 21M, 21C, and 21Bk is urged downward by an urging member (not shown), and is brought into contact with and positioned at each of the image forming portions 16Y, 16M, 16C, and 16Bk. Each holder 22Y, 22M, 22C, 22Bk is held by an upper frame 23 that can be freely opened and closed. Further, the LED units 21Y, 21M, 21C, and 21Bk are connected by signal cables 25 through the control unit 24 and the upper frame 23 in the apparatus main body.

  In the present embodiment, it is possible to switch between single-color printing and multi-color printing, and at the time of switching, a predetermined image forming unit among the image forming units 16Y, 16M, 16C, and 16Bk. Is brought into and out of contact with the conveyor belt 17. Along with this, the LED unit positioned and brought into contact with the image forming unit is moved while being supported by the holder in conjunction with the contact / separation operation.

  FIG. 2 is a detailed view of the signal cable according to the first embodiment of the present invention.

  As shown in the figure, the signal cable 25 is composed of a covering tube 25d, a covering portion 25a having a high bending rigidity covered by a shield mesh 25c for electrical shielding, and a plurality of single-core cable portions having a low bending rigidity. 25b.

  Next, the operation of the LED unit in a predetermined image forming unit will be described.

  FIG. 3 is a first diagram showing the operation of the LED unit in the first embodiment of the present invention, FIG. 4 is a second diagram showing the operation of the LED unit in the first embodiment of the present invention, and FIG. FIG. 6 is a diagram showing the operation of the cable clamp in the first embodiment of the present invention, FIG. 6 is a plan view of the cable clamp in the first embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along line AA in FIG. is there.

  In the figure, 21 is an LED unit as a first structure, 22 is a holder as a second structure that supports the LED unit 21 so as to be movable in the vertical direction, 23 is an upper frame, and 25 is an illustration of the LED unit 21. The signal cable 25 is held by a cable clamp 26 as a clamp member. The LED unit 21 functions as a movable part with respect to the signal cable 25.

  The LED unit 21 is connected to the control unit 24 (FIG. 1) via a signal cable 25. The cable clamp 26 is disposed so as to be swingable with respect to the holder 22, and has a first end portion 26a for holding the signal cable 25, and a first end portion below the first end portion 26a. 26a, a second end portion 26b formed in parallel with the first end portion 26a, a first connecting portion 26f for connecting the first and second end portions 26a, 26b. A third end portion 26c that supports the holder 22 in a swingable manner, a pair of support shaft portions 26g disposed on the third end portion 26c, and the first connecting portion 26f and the third end portion 26c. A second connecting portion 26h that connects the end portion 26c is provided. The first end portion 26a includes two arms 26i and 26j in order to hold the covering portion 25a of the signal cable 25. In the present embodiment, the predetermined positions of the arms 26i and 26j are as follows. A base portion is formed in an arc shape, and a holding portion 26m having a circular shape for holding the covering portion 25a is formed in the base portion.

  Then, as shown in FIGS. 6 and 7, a protrusion shape 27 is formed on the inner surface of the holding portion 26m. The protruding portion 27 is set so as to bite only into the covering tube 25d of the signal cable 25, so that the inner single-core cable is not damaged.

  The second end portion 26b is brought into contact with the LED unit 21, and the support shaft portion 26g is swingably engaged with a holding portion 22f formed at a substantially central portion in the length direction of the holder 22. Be made. Accordingly, the cable clamp 26 is swung as the LED unit 21 moves. That is, as the LED unit 21 moves in the direction of arrow A, the first and second ends 26a and 26b move in the directions of arrows B and C, and the LED unit 21 moves in the direction of arrow D. Accordingly, the first and second end portions 26a and 26b move in the directions of arrows E and F.

  As shown in FIG. 5, in the cable clamp 26, when the first end portion 26a is rotated with the support shaft portion 26g as the swing center, the center of the holding portion 26m is in the tangential direction of the locus CR1 drawn. An axis L1 of the signal cable 25 is set, and the axis L1 is inclined by a predetermined angle θ with respect to the axis L2 of the signal cable 25 held by the upper end portion 22a of the holder 22. As a result, the direction in which the signal cable 25 bends is always constant as the predetermined image forming unit is brought into contact with or separated from the transport belt 17.

  Further, when the radius of the locus is R1, and the radius of the locus CR2 drawn by the point where the second end portion 26b is in contact with the LED unit 21 is R2, if the radii R1 and R2 are the same or approximate values, Along with the separation operation, the distance Lv1 in which the center of the holding portion 26m moves in the vertical direction and the distance Lv2 in which the point of the second end portion 26b moves in the vertical direction become the same or approximate values. At this time, the distance Lh1 that the center of the holding portion 26m moves in the horizontal direction and the distance Lh2 that the point of the second end portion 26b moves in the horizontal direction are the same or approximate values.

  Next, the operation of the cable clamp 26 having the above configuration will be described.

  In the printer according to the present embodiment, it is possible to switch between single-color printing and multi-color printing, and at the time of switching, a predetermined image forming unit among the image forming units 16Y, 16M, 16C, and 16Bk. Is brought into and out of contact with the conveyor belt 17. Accordingly, the LED unit 21 positioned and brought into contact with the image forming unit is moved in the directions of arrows A and D while being supported by the holder 22 in conjunction with the contact / separation operation.

  As shown in FIG. 3, when the LED unit 21 moves downward (in the direction of arrow A), the cable clamp 26 is watched around the support shaft portion 26g by the elastic force of the bent and bent signal cable 25. It can be rotated around.

  As shown in FIG. 4, when the LED unit 21 moves upward (in the direction of arrow D), the cable clamp 26 supports the support shaft portion while keeping the second end portion 26 b in contact with the LED unit 21. It is rotated counterclockwise around 26g.

  Thus, in the present embodiment, the axis L1 is set in the tangential direction of the locus CR1 and is inclined by the angle θ with respect to the axis L2, so that the signal cable 25 is always bent in a certain direction. Then, the radii R1 and R2 are the same or approximate values, the distances Lv1 and Lv2 are the same or approximate values, and the distances Lh1 and Lh2 are the same or approximate values, so the LED unit 21 is moved in the vertical direction. Even if this is done, the wiring configuration of the single-core cable portion 25b can be maintained.

  Therefore, even if the LED unit 21 moves, no mechanical stress is applied to the single-core cable portion 25b, so that the durability of the signal cable 25 can be improved and the occurrence of disconnection can be prevented. it can.

  Next, a second embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st Embodiment, the description is abbreviate | omitted by providing the same code | symbol, and the effect of the same embodiment is used about the effect of the invention by having the same structure. .

  FIG. 8 is an exploded perspective view showing the main part of the printer according to the second embodiment of the present invention, FIG. 9 is a first view showing the operation of the LED unit according to the second embodiment of the present invention, and FIG. It is a 2nd figure which shows operation | movement of the LED unit in the 2nd Embodiment of this invention.

  As shown in the figure, engagement holes 22c made of elongated holes are formed at both ends of the holder 22 as the second structure, and engagement protrusions 21a are formed at both ends of the LED unit 21 as the first structure. Then, the LED unit 21 can be assembled to the holder 22 so as to be movable by engaging the engagement holes 22c with the engagement protrusions 21a. The LED unit 21 is urged downward in the figure by a coil spring (not shown) as an urging member. Further, a pair of engagement holes 22b for engaging the holder 22 and the cable clamp 26 are formed in the vicinity of one end of the holder 22, and the support shaft of the cable clamp 26 as the engagement hole 22b and the clamp member is formed. The cable clamp 26 can be pivotably attached to the holder 22 by engaging the portion 26g.

  A coil spring 28 as an urging member is attached to one of the pair of support shaft portions 26g, and the coil spring 28 applies a predetermined urging force to the LED unit 21 via the second end portion 26c. To urge downward. For this purpose, the coil spring 28 is provided with a coil portion 28a at the center, and both ends of the coil portion 28a are extended radially outwards as arms 28b and 28c at a predetermined angle. The coil portion 28a is fitted to one of the support shaft portions 26g, the arm 28b is locked to a stopper 26d formed on the third end portion 26c, and the arm 28c is fixed to the bottom portion 22d of the holder 22. Be locked.

  Therefore, as shown in FIG. 9, when the LED unit 21 moves downward (in the direction of arrow A), the cable clamp 26 is caused by the elastic force of the bent signal cable 25 and the biasing force of the coil spring 28. With the second end portion 26b pressed against the LED unit 21, the second end portion 26b is rotated clockwise around the support shaft portion 26g.

  Further, as shown in FIG. 10, when the LED unit 21 moves upward (in the direction of arrow D), the cable clamp 26 supports the support shaft portion while keeping the second end portion 26 b in contact with the LED unit 21. It is rotated counterclockwise around 26g.

  Thus, in the present embodiment, the second end portion 26 b is pressed against the LED unit 21 by the urging force of the coil spring 28, and the cable clamp 26 always follows without leaving the LED unit 21. Therefore, even if the LED unit 21 is moved in the vertical direction, the wiring configuration of the single-core cable portion 25b can be maintained.

  As a result, even if the LED unit 21 moves, no mechanical stress is applied to the single-core cable portion 25b, so that the durability of the signal cable 25 can be further improved and the occurrence of disconnection is prevented. be able to.

  Next, a third embodiment of the present invention will be described. In addition, about the thing which has the same structure as 1st, 2nd embodiment, the description is abbreviate | omitted by providing the same code | symbol, About the effect of invention by having the same structure, the effect of the embodiment Is used.

  FIG. 11 is a diagram showing the main part of the printer according to the third embodiment of the present invention, and FIG. 12 is a detailed view of a signal cable according to the third embodiment of the present invention.

  As shown in FIG. 12, the signal cable 25 includes a covered tube 25d, a covered portion 25a having a high bending rigidity covered by a shield mesh 25c for electrical shielding, and a plurality of single-core cables having a low bending rigidity. The shield net 25c is composed of a portion 25b, reversed at the tip, and overlaid on the covering tube 25d.

  Further, the holder 22 and the upper frame 23 as the second structure are formed of a conductive material, and the holder 22 and the upper frame 23 are made conductive by a contact member 29 formed of a conductive material. The cable clamp 26 as a clamp member is formed of a conductive material, holds the shield net 25c at the first end 26a, and the LED unit as the first structure at the second end 26b. Conducted with 21 frames. Therefore, the frame of the LED unit 21 is electrically connected to the ground terminal formed on the frame of the apparatus main body (not shown) via the cable clamp 26, the holder 22, the contact member 29, and the upper frame 23, and is grounded.

  The cable clamp 26, the holder 22 and the upper frame 23 may be formed of a conductive member such as metal, or may be formed by applying a conductive paint to a molded member.

  Thus, in the present embodiment, electrical noise generated in the signal cable 25 can be released through the ground terminal, so that data transmission can be stabilized. Therefore, the image quality can be improved.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a figure which shows the printer in the 1st Embodiment of this invention. It is detail drawing of the signal cable in the 1st Embodiment of this invention. It is a 1st figure which shows operation | movement of the LED unit in the 1st Embodiment of this invention. It is a 2nd figure which shows operation | movement of the LED unit in the 1st Embodiment of this invention. It is a figure which shows operation | movement of the cable clamp in the 1st Embodiment of this invention. It is a top view of the cable clamp in the 1st Embodiment of this invention. It is AA sectional drawing of FIG. It is a disassembled perspective view which shows the principal part of the printer in the 2nd Embodiment of this invention. It is a 1st figure which shows operation | movement of the LED unit in the 2nd Embodiment of this invention. It is a 2nd figure which shows operation | movement of the LED unit in the 2nd Embodiment of this invention. It is a figure which shows the principal part of the printer in the 3rd Embodiment of this invention. It is detail drawing of the signal cable in the 3rd Embodiment of this invention.

Explanation of symbols

21 LED unit 22 Holder 25 Signal cable 26 Cable clamps 26a to 26c First to third ends 26g Support shaft

Claims (6)

(A) a first structure comprising an electronic circuit;
(B) a second structure that movably supports the first structure;
(C) a signal cable connected to the electronic circuit;
(D) A first end for holding the signal cable, a second end abutted against the first structure, and a swingable engagement with the second structure. A clamp member comprising a third end portion provided with a support shaft portion;
(E) The electronic device according to claim 1, wherein the clamp member is swung around the support shaft portion as a swing center in accordance with the movement of the first structure. (A) The first end portion includes a holding portion that holds the signal cable,
(B) The axis of the signal cable set in the tangential direction of the locus drawn by the center of the holding portion when the clamp member swings is the signal cable held in the upper end portion of the second structure. The electronic device according to claim 1, wherein the electronic device is tilted by a predetermined angle with respect to the axis.   When the clamp member swings, the radius of the locus drawn by the center of the holding portion and the radius of the locus drawn by the point where the second end abuts the first structure are set to be the same or approximate values. The electronic device according to claim 2.   The electronic device according to claim 2, wherein a protrusion shape is formed on an inner surface of the holding portion.   The electronic device according to claim 1, wherein a biasing member that presses the first structure with a predetermined biasing force is disposed on the shaft support portion. (A) The clamp member is made of a conductive material and is electrically connected to a ground terminal, and (b) the first end holds a shield net of the signal cable. The electronic device according to item 1.

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