JP3642115B2 - Flat cable case body and electric vacuum cleaner using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flat cable casing for electrically connecting the hula Ttokeburu and electric vacuum cleaner equipped with a telescopic extension tube use it.
[0002]
[Prior art]
The conventional flat cable 1 is mainly used for a low voltage having a working voltage of 30 V or less, and has a configuration as shown in FIGS. That is, it has a three-layer structure of a plurality of conductor foils 3 made of a tin-plated copper body integrated on a polyester base body 2 with the same polyester adhesive and an insulating laminate 4 covering the conductor foil 3. It was. The laminate 4 was removed to expose the conductive foil 3 at both ends for electrical connection.
[0003]
Further, in general, reinforcing plates 5 having a thickness of about 0.3 mm are integrated at both ends in order to ensure the strength at the time of connection work. Further, the structure for electrically connecting the flat cable 1 and the lead wire 6 has a structure as shown in FIG. That is, the flat cable 1 is inserted and connected to a connector A10 composed of a case body A8 and a connection terminal A9 fixed by soldering to the printed circuit board 7, and the lead wire 6 is covered with the connection terminal B11 and assembled into the case body B12. Generally, the connector B13 is composed of a connector pin 13 and a housing 14 and is soldered and fixed to the printed circuit board 7 to be electrically connected.
[0004]
[Problems to be solved by the invention]
However, in such a conventional configuration, there is no problem with the portion covered with the laminate because the insulation between the conductor foils is ensured, but since the conductor foil is exposed at the electrical connection portion, the voltage used is In order to ensure a suitable insulation distance, it is necessary to provide a sufficient distance between the conductor foils.
[0005]
In other words, when using for high voltage, it is necessary to increase the distance between conductor foils to ensure safety compared to using at low voltage, and the conductor foils of flat cables are generally arranged in parallel. There were problems that the width dimension was increased, the material cost was increased, and the device could not be miniaturized.
[0006]
In addition, the electrical connection between the conventional flat cable and the lead wire is configured via a connector with a printed circuit board and connection terminals, which increases the number of parts and at the same time increases the height of the electrical connection part. There was a big obstacle to realizing the miniaturization of the equipment utilizing the thinness.
[0007]
SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and provides a flat cable structure that can secure an insulation distance without increasing the flat cable width dimension and improve safety even when used for high voltages. One purpose.
[0008]
A second object is to provide a flat cable case body having a structure capable of ensuring the insulation distance more reliably and improving safety, and at the same time achieving further miniaturization by combining with the flat cable. .
[0009]
A third object is to provide a vacuum cleaner including a telescopic extension tube that employs a flat cable and a flat cable case body and is small in size and reduced in manufacturing cost.
[0010]
[Means for Solving the Problems]
In order to achieve the first and second objects, a flat cable case body of the present invention includes a base body, a plurality of conductor foils integrally joined on the base body, and a laminate that covers the base body and the conductor foil. And the end laminate is peeled off to expose the conductor foil, and a comb-like end face is provided by providing notches between the plurality of conductor foils over a range equal to or greater than the peeling length of the laminate. wherein a plane portion for mounting the base member to form a wall portion fitted to the cutout portion provided at an end portion of the flat cable, and enables mounting the flat cable constituting a and the flat cable Therefore, the conductor foil can be prevented from being short-circuited on the base body, and a large insulation distance can be secured without increasing the dimension between the conductor foils. Further, when the flat cable is attached to the flat cable case body, the insulation distance between the conductor foils is surely and greatly increased by the wall surface portion, so that the size between the conductor foils can be minimized and the size can be reduced.
[0011]
In order to achieve the third object, the present invention includes an inner tube that is arranged to be movable in the axial direction in the outer tube, and one end fixed to the inner tube side and the other end fixed to a storage portion provided in the outer tube. It consists of a flat cable and the lead wire which fixed the connecting terminal to one end, and connects with the case body for flat cables of any one of the said Claims 1-6 as a lead wire except the range of the bending displacement of a flat cable Because the vacuum cleaner is equipped with a telescopic extension tube, the outer dimensions are not increased even if the length of the flat cable is limited to the range that needs to be bent and displaced. However, it is possible to provide a vacuum cleaner equipped with an expansion / contraction extension tube with a low production cost by minimizing the amount of use of a high flat cable.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The invention of claim 1, wherein of the present invention has a base body, and joined together on a base body and (strip-shaped) more conductive foil, and a laminate material covering the base member and the conductive foil, the end portion The laminate is peeled to expose the conductor foil, and further, a flat cable having a comb-like end face is provided by providing a notch portion between the plurality of conductor foils over a range equal to or greater than the peeling length of the laminate. a planar portion for mounting the base member, said forming a wall portion fitted to the cutout portion provided at an end portion of the flat cable, wherein since the attachable flat cable, the conductor foil base body on It is possible to prevent a short circuit, and to secure a large insulation distance without increasing the dimension between the conductor foils. Further, when the flat cable is attached to the flat cable case body, the insulation distance between the conductor foils is surely and greatly increased by the wall surface portion, so that the size between the conductor foils can be minimized and the size can be reduced.
[0013]
In the invention according to claim 2 of the present invention, the flat portion is inclined so as to rise from the abutment portion that abuts the end surface of the flat cable, the guide portion that guides both ends of the flat cable in the width direction, and the insertion port side to the back side. Forming a convex portion having a height greater than the thickness of the base body of the flat cable, providing the flat cable with a hole that fits the convex portion at the same position as the distance from the tip of the end surface to the convex portion, and Since the holding portions of the flat cable are provided at the left and right ends of the convex portion, the retaining structure between the flat cable and the case body can be formed by the convex portion and the hole.
[0014]
According to a third aspect of the present invention, there is provided a holding portion for holding a plurality of lead wires separated from each other on the opposite side of the flat portion of the case body, and the case body having an opening above the comb-shaped end surface of the flat portion. By making the upper side of the flat part open, the lead wire and the flat cable can be directly connected from the upper part by soldering or the like, and there is no need to interpose another connection terminal. Furthermore, it is possible to prevent the insulation distance from being reduced by the soldering work by the wall surface portion, and it is also possible to prevent the positional deviation at the time of setting by retaining.
[0015]
According to a fourth aspect of the present invention, there is provided a pressing portion that covers the upper surfaces of both ends of the notch portion of the comb-shaped end surface by providing a gap larger than the thickness of the flat cable between the flat surface portion on both sides of the wall surface portion. By forming, it can prevent that the comb upper end surface of a flat cable floats, and the workability | operativity of soldering improves.
[0016]
According to a fifth aspect of the present invention, in the case where the holding portion is not provided with an upper wall in the range for holding the covering portion of the lead wire, the range for holding the core wire is formed with an insertion hole portion. The conductor foil of the flat cable and the core wire of the lead wire can be brought close to each other without increasing the height of the wire, and the soldering workability can be improved.
[0017]
In the invention according to claim 6 of the present invention, the holding portion is an upper opening, and a lid body having a shape covering the holding portion and the wall surface portion is provided, so that the lead wire can be easily attached to the case body and positioning is ensured. I can do it. Further, since the lid body is formed of a heat resistant material, the wall surface and the guide portion of the case body are not damaged by heat during the soldering operation, and the insulation distance can be prevented from decreasing.
[0018]
The invention according to claim 7 of the present invention includes an outer tube, an inner tube disposed in the outer tube so as to be movable in the axial direction, and a storage portion in which one end is fixed to the inner tube and the other end is provided in the outer tube. The case for a flat cable according to any one of claims 1 to 6, comprising a fixed flat cable and a lead wire having a connection terminal fixed to one end thereof, and a lead wire other than a bending displacement range of the flat cable. Even if the length of the flat cable is limited to the range that needs to be bent and displaced, the outer dimensions are not increased, and this minimizes the use of flat cables, which are more expensive than lead wires. Thus, the expansion / contraction extension tube can be manufactured at a low manufacturing cost.
[0019]
【Example】
(Example 1)
A first embodiment of the present invention will be described below with reference to the drawings. First, in FIGS. 1 to 4, reference numeral 20 denotes a flat cable composed of a conductive foil 22 bonded and fixed on a base body 21, a laminate 23 and a reinforcing plate 24. A comb-like end face is formed by forming a notch 25 extending further in the anti-connection direction. Two round holes 26 are formed behind the notches 25.
[0020]
On the other hand, 27 is a case body provided with a flat surface portion 28 on which the reinforcing plate 24 of the flat cable 20 is placed and provided with a wall surface portion 29 at a position where it fits into the notch 25.
[0021]
The flat portion 28 has a contact portion 30 that contacts the tip of the comb-shaped end surface of the flat cable 20, a guide portion 31 that guides both ends in the width direction, and a case body 27 from the side where the flat cable 20 is inserted to the back side. Two protrusions 32 are provided which are inclined to become higher and have a height greater than the end thickness t (including the thickness of the reinforcing plate 24) of the flat cable.
[0022]
In addition, pressing portions 33 each having a gap T larger than the end thickness t of the flat cable 20 are provided between both sides of the wall portion 29 and the inside of the guide portion 31. Further, on the opposite side of the flat portion 28, a holding portion 36 that press-holds the covering portion 35 of the lead wire 34 and is separated from each other, and an insertion hole portion 38 that holds the core wire 37 of the lead wire 34 are integrally formed.
[0023]
The operation of the above-described configuration will be described. Since the cutout 25 of the flat cable 20 cuts into the laminate 23, the conductor foil 22 is not adjacent on the base body 21. For this reason, even when it is used for high voltage with increased insulation, it is not necessary to greatly increase the distance between the conductor foils, and the width dimension can be reduced.
[0024]
Further, when the flat cable 20 is attached to the case body 27, the wall surface portion 29 is fitted into the cutout portion 25, so that the conductor foil 22 is completely isolated by the wall surface portion 29, and the creeping distance is also the height of the wall surface portion 29. Therefore, even if the distance between the conductive foils is reduced, it becomes possible to withstand high voltage and further miniaturization can be achieved.
[0025]
At this time, as shown in FIG. 1, the cutout portion 25 bites into the laminate 23 1 to 2 mm deeper than the peeled portion, and at the same time, the length of the wall portion 29 needs to be substantially the same as the depth of the cutout portion 25.
[0026]
Further, when the flat cable 20 is inserted into the case body 27 from the direction of arrow A in FIG. 1, both side surfaces of the flat cable 20 in the width direction are pressed from above by the pressing portions 33, while the reinforcing plate 24 is deformed into a drum shape. The protrusion 32 is overcome and the tip of the comb-shaped end face abuts against the abutting portion 30. At the same time, the protrusion 32 is fitted and locked in the hole 26.
[0027]
In this way, the flat cable 20 can be reliably prevented from coming off from the case body 27 at the same time as the insertion is completed, so that the reliability of the electrical connection portion can be improved without disconnection even during assembly work, transportation, and after assembly. is there.
[0028]
(Example 2)
Next, a second embodiment of the present invention will be described with reference to FIGS.
[0029]
At the same time as providing a holding portion 36 for holding a plurality of lead wires 34 on the opposite side of the flat portion 28 of the case body 27, the upper side of the flat portion 28 is an opening. After inserting and attaching the lead wires 34 from the other end side, the core wire portion 35a of the lead wire 34 can be soldered to the conductor foil 22 of the flat cable 20, so that the number of parts can be reduced without requiring a separate connection terminal. Can be reduced. Further, since the wall portion 29 is provided, the creepage distance does not decrease even when soldering is performed.
[0030]
The presser portions 33 provided on both sides of the wall surface portion 29 of the case body 27 allow the comb-like end surface of the flat cable 20 to be in close contact with the flat portion 28 throughout the entire area, thereby improving the soldering workability.
[0031]
Further, since the lead wire 3 can be fixed by tightly attaching the core wire 36 onto the conductor foil 22 through the insertion hole 38, the solder is reliably deposited on both the core wire 36 and the conductor foil 22, and the reliability of the solder portion is increased.
[0032]
(Example 3)
Next, a third embodiment of the present invention will be described with reference to FIG. In addition, about the same component as the said Example, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0033]
The holding part 36 is formed with a cover 40 having an opening on the upper side of both the covering part 35 and the core wire part 36 of the lead wire 34, and is formed of a heat-resistant material, and a lid 40 is formed with a positioning part 39 for pressing the core wire part 36 of the lead wire 34 from above. An example provided separately will be shown. According to the present embodiment, it is easy to set the lead wire 34 to the case body 27, and at the same time, the core wire portion 36 is securely adhered to the conductor foil 22, and the wall surface portion 29 of the case body 27 and the upper surface of the guide portion 31 are the lid body. Since it is covered with 40, it is possible to prevent burning during soldering.
[0034]
(Example 4)
Next, a fourth embodiment of the present invention will be described with reference to FIGS. In addition, about the same component as the said Example, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0035]
In FIG. 6, reference numeral 41 denotes a power cord (not shown), a main body of a vacuum cleaner incorporating an electric blower (not shown), 42 a hose having a hand portion 43 connected to the main body 41, 44. Is a telescopic extension tube that is detachably engaged by a hand portion 43 and a buckle 45 and forms a receiving portion 47 in which a buckle 46 is arranged at the tip, and 48 is inserted into the receiving portion 47 and is detachable by the buckle 46. The power nozzle is engaged and provided with a terminal pin 49.
[0036]
Next, in FIG. 7, the expansion / contraction extension tube 44 includes an outer tube 50 connected to the hand portion 43 and an inner tube 51 that is inserted in the outer tube 50 so as to be movable in the axial direction, and is connected to the hand portion 43. Is provided with a terminal portion 54 for electrical connection. The lead wire 34 is disposed in the outer tube storage portion 55 extending in the axial direction of the outer tube 50, and the lead wire 34 and the case body 27 are electrically connected. It is electrically connected to the connected flat cable 20. The receiving portion 47 of the inner tube 51 is provided with a terminal (not shown) that is electrically connected to the power nozzle 48, and a lead in the inner tube side storage portion 56 that extends in the axial direction of the inner tube 51. The wire 34 is electrically connected to the flat cable 20 via the terminal of the receiving portion 47 and the case body 27.
[0037]
A roller 58 for changing the direction of the flat cable 20 by 180 ° is provided at the opening 57 at the distal end of the outer tube housing 55. A guide body 60 for slidably holding the inner tube 51 is fixed to the distal end expanded portion 59 of the outer tube 50, and a locking recess 62 formed on the upper surface of the inner tube 51 by a spring 61 is attached to the guide body 60. A push button 63 urged in the direction to be pushed into is rotatably attached.
[0038]
The operation of the telescopic extension tube configured as described above will be described.
[0039]
First, the expansion and contraction of the expansion / contraction extension tube can be freely performed by releasing the engagement with the inner tube 51 by pressing the push button 63. At this time, the flat cable 20 is bent and slid in the range of L while being guided by the roller 58.
[0040]
As described above, according to the expansion / contraction extension pipe according to the present invention, the expensive flat cable 20 is used only in the range where the bending displacement is necessary using the case body 27, and the inexpensive lead wire 34 is used in the other fixing range. Thus, the manufacturing cost of the entire extension pipe can be reduced, and at the same time, the external dimensions of the extension pipe can be reduced.
[0041]
【The invention's effect】
According to the invention of claim 1, wherein of the present invention as is clear from the above description, without increasing the distance between the conductor foil by providing the cutout portion, a small flat cable since it is to improve the insulation performance In addition, since the creepage distance can be forcibly secured by the wall surface portion formed in the flat cable case body , the flat cable can be further reduced in size and used at a high voltage.
[0042]
According to the second aspect of the present invention, the flat cable can be prevented from coming off with a simple configuration, and the reliability of the electrical connection portion can be improved.
[0043]
According to the third aspect of the present invention, it is possible to electrically connect the flat cable and the lead wire without using other parts such as connection terminals, thereby reducing the manufacturing cost and realizing the downsizing of the electrical connection portion. It is.
[0044]
According to the fourth aspect of the present invention, the flat cable is prevented from being lifted, the solder workability is improved, and the productivity is increased.
[0045]
According to the invention described in claim 5 of the present invention, the reliability of the soldering portion is enhanced by tightly holding the conductor foil of the flat cable and the core wire of the lead wire.
[0046]
According to the invention of claim 6, wherein the present invention is intended to increase the productivity of preventing getting scratched during soldering work at the same time to facilitate setting leads to the case body.
[0047]
According to the seventh aspect of the present invention, the amount of use of the flat cable can be minimized without increasing the outer dimension of the extension pipe, and therefore an easy-to-use expansion / contraction extension pipe can be provided at low cost. It increases the commercial value of vacuum cleaners.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a flat cable and a flat cable case according to first and second embodiments of the present invention. FIG. 2 is a cross-sectional view taken along the line aa in FIG. FIG. 4 is a cross-sectional view of FIG. 1. FIG. 5 is a perspective view of the flat cable case body according to the third embodiment of the present invention. Overall perspective view of the vacuum cleaner shown in FIG. 7 Cross-sectional view of the extension tube of the vacuum cleaner FIG. 8 Perspective perspective view of the conventional flat cable FIG. 9 Cross-sectional view of the flat cable Sectional view showing the electrical connection between a conventional flat cable and lead wire 【Explanation of symbols】
DESCRIPTION OF SYMBOLS 20 Flat cable 21 Base body 22 Conductor foil 23 Laminating material 25 Notch part 27 Case body 28 Plane part 29 Wall part 32 Convex part 33 Holding part 36 Holding part

Claims (7)

A base body, a plurality of conductor foils integrally bonded on the base body, and a laminate covering the base body and the conductor foil; and peeling the end laminate to expose the conductor foil; and a planar portion for mounting the base body constituting the flat cable with a comb-shaped end face a notch portion is provided from the end portion between the plurality of conductive foil over a range of more than molting length, the end of the flat cable A flat cable case body that is formed with a wall surface portion that fits into a notch portion provided in the portion and to which the flat cable can be attached . The flat part has an abutment part that abuts the end surface of the flat cable, a guide part that guides both sides of the flat cable end, and is inclined so that the back side is higher than the insertion port side and is larger than the thickness of the base body of the flat cable. becomes high to form a convex portion having a provided the protrusions and the fitting holes in the flat cable, and the flat cable of the pressing portion formed by providing claim 1, wherein the flat cable to the left and right ends of the projecting portions Case body. The case body for flat cables according to claim 1 or 2 , wherein a holding portion for holding a plurality of lead wires is provided on the opposite side of the flat portion of the case body, and the upper side of the comb-shaped end surface of the flat portion is opened. On both sides of the wall portion, provided a larger gap than the thickness of the flat cable between the flat portion, any one of claims 1 to 3 to form a pressing portion that covers the upper surface of both ends of the notch of the comb-like end face 1 A case for a flat cable according to the item. The flat cable case body according to claim 3 or 4 , wherein the holding portion does not provide an upper wall in a range for holding the covering portion of the lead wire and an insertion hole portion is formed in the range for holding the core wire. The flat cable case body according to claim 3, wherein the holding portion is an upper opening, a lid body having a shape covering the holding portion and the wall surface portion is provided, and the lid body is made of a heat resistant material. An outer tube, an inner tube that is arranged so as to be movable in the axial direction in the outer tube, a flat cable in which one end is fixed to the inner tube side and the other end is fixed in a storage portion provided in the outer tube, and a connection terminal is provided at one end The electric cleaning provided with the extension extension pipe which consists of a fixed lead wire and was connected with the case for flat cable according to any one of claims 1 to 6 as a lead wire outside the range of bending displacement of the flat cable Machine.

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