JP2018061092A - Electronic device with cord - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus in which there is little worry of breaking the cord, the storage space of cord is small and not bulky, and the cord can be stored simply.SOLUTION: An electronic apparatus with cord can store a cord easily and compactly with little worry of breaking the cord, by using an elastic cord in an electronic apparatus where the cord take-out part has a curved surface, and a recess for winding the cord, and having a connector housing part and/or a plug housing part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electronic device with a cord.

The electronic device mentioned here refers to a device with a cord for inputting / outputting power or signals. If you list typical ones, communication and audio equipment such as earphones, head-mounted displays, income, etc. from personal computers and smartphone peripherals including AC adapters, mice, external DVD players, etc., and hair dryers There are home appliances and power tools.
When carrying these devices, there are problems that the cords are obstructed when carrying them, and it takes time to store them, the capacity for storing the cords becomes large, and the load becomes bulky, and “breaks” and “squeezed” occur and break.
In order to solve these problems, for example, Patent Document 1 discloses a technique related to a charging device covered with an elastic body on which a cord can be wound. Patent Document 2 discloses a technique for storing a cable and a connector as a unit with a portion around which a cord is wound as an AC adapter for a mobile phone. However, according to the knowledge of the present inventors, the technique of Patent Document 1 has a problem that the boot portion protrudes and is difficult to store compactly. In the technique of Patent Document 2, the length of the cord is required to store the connector in the case. There was a problem that it was difficult to store the cable because of the need for extra space. In addition, there is a problem that the cord is pulled in various directions during use and is easily disconnected.

  In recent years, with the miniaturization of electronic devices, cases of carrying various electronic devices such as PCs, mobile phones, tablets, and smartphones are increasing. At this time, an AC adapter for charging, a battery for charging, and a cable connecting them are often carried around. Compared to the miniaturization of electronic equipment, the code has not evolved, and there is a strong need for "I want to reduce the bulk of the code" and "I want to make it easy to store."

JP 2003-040533 A Utility Model Registration No. 3142979

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic device that is less likely to be broken in a cord of an electronic device, has a small cord storage space, is not bulky, and can easily store a cord.

  The present inventors have an electronic device in which a cord extraction portion of an electronic device has a curved surface, has a recess for winding the cord, and has a connector storage portion and / or a power plug storage portion attached to the tip of the cord. By using an elastic cord for the device, the present invention succeeded in realizing an electronic device with a cord that is difficult to be disconnected and can be stored in a compact manner and that the cord can be easily stored.

That is, the present invention provides the following inventions.
(1) An electronic device with a cord having elasticity, having a recess for winding the cord, and having a portion for taking out the cord in the recess, and the cord taking-out portion further An electronic device with a cord having a curved surface in a winding direction and having a concave portion in which a connector portion or a plug portion at a tip of the cord is accommodated.
(2) The corded electronic device according to claim 1, wherein the cord has a stretchability of 10% or more.
(3) The corded electronic device according to (1) or (2), wherein a curved surface of the cord extraction portion from the electronic device has a curvature radius R> 1 mm.
(4) The cord take-out part is inclined with respect to the winding direction of the cord, and the direction in which the cord is easy to wind is determined. (1) to (3) Electronic device with cord.
(5) The corded electronic device according to (4), wherein a housing portion of the connector portion or the plug portion is 10 mm or more away from a corner portion nearest to the cord winding direction.
(6) When the length of the outermost circumference when the cord is wound is L1, the length of the cord from the cord take-out portion to the connector portion or the plug portion at the tip of the cord is a natural length L (L: The length from the cord take-out part to the base part of the connector part or the plug part when the connector part or the plug part fits in the connector housing part or the plug housing part without expansion or contraction of the cord when wound without being stretched ),
The corded electronic device according to any one of (1) to (5), which is shorter by L1 × 0.05 to L × maximum extension rate of stretchable electric wire (%) / 100 × 0.8.

  The electronic device with a cord of the present invention provides an electronic device that is hard to be disconnected, can be stored compactly, and can be easily stored.

It is a figure which shows the example of a smart phone and a portable adapter (small). It is a figure which shows the example of AC adapter (large sized) for PC. It is a figure which shows the example of a stick type AC adapter. It is the figure which showed the length of the outermost periphery of the code | cord | chord which concerns on this invention.

  The present invention will be specifically described below.

  The electronic device referred to in the present invention has a curved portion for taking out the cord, a recess for winding the cord, a connector storage portion and / or a power plug storage portion attached to the tip of the cord, It is an electronic device with a unique code.

  It is important that the cord extraction portion has a curved surface. If there is an acute angle, it will be easy to break during repeated winding and unwinding operations. The curvature radius R of the aspect is 1 mm or more, more preferably 5 mm or more, and further preferably 10 mm or more. In addition, the magnitude | size of R may differ in the right and left of a winding part. By taking out the cord obliquely and winding it in the inclined direction, it becomes easier to obtain a large curved surface, and bending fatigue that occurs during winding can be suppressed. At this time, it is important that there is no sharp surface so that R of other surfaces does not hit the corner. Preferably, R is 1 mm or more.

It is important that the winding portion of the cord is recessed. As an example, it is shown as reference numeral 2 in FIG.
The winding portion may be round, rectangular, or polygonal. However, it is important that the corner is rounded because it becomes easy to break when wound at an acute angle. The roundness is preferably R> 1 mm, R> 5 mm, and more preferably R> 10 mm.

It is important that the corded electronic device of the present invention has a connector housing portion and / or a power plug housing portion.
If there is no connector storage section or power plug storage section, the cord can be unwound even if it is wound, so the cord and connector section must be fixed using Velcro (registered trademark), etc., and easy storage is realized. Can not.
It is important that the connector storage portion or the power plug storage portion is at least 10 mm away from the nearest corner portion in the cord winding direction. When it is close to the corner, it is difficult to store, and the base of the connector portion is often bent at the time of storage, and disconnection is likely to occur.

The corded electronic device in the present embodiment is preferably provided with a power plug in addition to the connector. There are cases where the power plug is attached to the electronic device main body (FIG. 1) and cases where it is attached via a cord (FIG. 2). For example, when the electronic device is an AC adapter, the power plug is often used via a cord when the adapter body generates a large amount of heat.
First, an example in which the power plug is attached to the main body of the electronic device is shown in FIG. 1 or FIG. 3, but the power plug can be used by being rotated by 90 ° relative to the state in which the power plug is stored, ° By rotating it so that it can be used, it becomes easier to insert the power plug into the insertion port even if other plugs are in contact with the adjacent power plug insertion port.
Also, in order to reduce interference with the adjacent power plug outlet, the power plug should not be separated from the side surface of the electronic device, and the distance is recommended to be within 13 mm. More preferably, it is within 10 mm. In addition, the shape in which the plug is arranged so that the distance between both sides is within 10 mm is particularly preferable because interference with the adjacent power plug insertion port is reduced. An example showing the distance of the power plug from the surface close to the side surface of the electronic device is shown as reference numeral 3 in FIG.
As shown in FIG. 2, the power plug may be one that can accommodate the power plug.
When the power plug is attached via a cord, as shown in FIG. 2, by wrapping the cord for the power plug on the upper surface side of the main body and wrapping the cord on the connector side on the lower surface side, A cord can be stored, and a clean electronic device with a cord can be obtained.
In this case, the winding direction is not particularly limited, but by setting each direction in the opposite direction, the direction in which the cord is wound is the same while holding the main body, and it is easy to use.

It is essential that the cord used in the present invention expands and contracts.
Since it is difficult to adjust the length when it is wound unless it expands and contracts, the connector portion is less likely to fit into the planned storage location.
Specifically, if a non-stretchable cord is used, even if the connector is attached so that it fits the connector position after winding, if the cord is wound in multiple layers, the length when the cord is wound will change slightly. The connector part does not reach and rewinding becomes necessary, or the connector part is exceeded and the cord is lifted.
These problems can be solved by using a stretchable cord.
In particular, when attaching an elastic cord, when the length of the outermost cord when the cord is wound is L1 (measurement method will be described later), the connector portion or plug portion at the end of the cord from the cord take-out portion The length of the cord up to L1 × 5 (%) from the natural length L (the length that the connector part or plug part fits in the connector housing part or plug housing part when the cord is wound without stretching the cord) ) By shortening the above, it is possible to prevent the connector portion from being excessively long during winding. On the other hand, if the length is too short, the connector does not reach the connector housing portion, so it is preferable to adjust the length to L × the maximum extension rate of the stretchable wire (500 g load extension rate (%) / 100 × 0.8). If it is in the range up to the maximum extension of the L1 × extensible electric wire cord, it is easy to handle because it can be wound naturally and the length can be adjusted only at the outermost periphery. A method for measuring the 500 g load elongation rate will be described later.
The expansion / contraction rate of the stretchable electric wire used in the present invention is preferably 10% or more when a load of 500 g is applied, and recovers to less than 10% when the load is removed. Of course, those that stretch well and shrink well are preferable, and the elongation is 20% or more, more preferably 30% or more. Moreover, what recovers to less than 10% when a load is removed is preferable, and more preferably recovers to less than 5%.

How to fix to the code takeout part.
Since the outer diameter of the stretchable cord becomes thinner when stretched, it is important that the cord is not pulled out at the cord takeout portion.
The cord take-out part may be hardened with resin or may be stopped with an adhesive.
Repeated stretching and shrinking peels off at the interface with the resin and adhesive, making it easy to remove the cord. It may be tightened with an insulation lock. Moreover, you may crimp with a metal sleeve using a crimping tool. The cord may be damaged if it is crimped with metal, or tightened with a wire or an insulation lock. Therefore, if a rubber tube or a heat-shrinkable tube is interposed between the cord and the cord, the damage can be reduced.

  The cord used in the present invention may be the side that receives power from the outlet, the so-called temporary side, the secondary side after conversion, or both. Further, it may be a code for exchanging signals.

A stretchable cord can be obtained using a known method.
As a typical method, there is a method in which a conductor wire is spirally wound around a stretchable core material. When the conductor wire is wound and relaxed in a state where the core material is stretched, a stretchable cord having good stretchability can be obtained.

Two or more conductor wires are preferably wound.
The direction may be S / Z, S / S, or Z / Z as long as it is spirally wound.
Preferably, a plurality of conductor wires are all wound in the same direction. More preferably, a plurality of conductor wires are wound in the same direction, and the insulating fibers pass through the inner side (core material side) and the outer side (outer covering side) of the conductor in the opposite direction to the conductor wires, The conductor wire is restrained. Such a stretchable cord is hard to be disconnected because the conductor wires do not overlap and are not easily deformed locally even when stretched or bent.

  Hereinafter, the present invention will be described in detail based on examples and comparative examples, but the present invention is not limited to these examples.

  Bending R (power factor radius) of the take-out part 50: It was determined from the cross-sectional shape of the electronic device code take-out port (see the specific example of the take-out part in FIG.

Elasticity: Stretch a 30cm elastic cord vertically, mark it between 20cm, measure the distance (X) cm between the marks when a 500g load is attached to the lower end, and after removing the load The distance (Y) cm was measured, and the elongation rate and the recovery rate were determined by the following equations.
500 g load elongation rate expansion / contraction rate (%) = {(X-20) / 20)} × 100
Recovery rate (%) = {(XY) / (X-20)} × 100

  Outermost circumference distance (L1): A distance on the outermost circumference in a state where the cord is wound and the connector portion or the power supply coat portion is accommodated in the cord accommodation portion or the power supply cord portion. This distance refers to the portion indicated by the hunting portion marked in the area 2 in FIG. The length of the tape is 10-50% thinner than the width of the cord wrapping part, and the part indicating the boundary of the part corresponding to the hunting part in FIG. The distance was determined, and the distance between the marks was defined as the outermost length L1.

Example 1
Specially made stringing machine for core material ((1) Mechanism for supplying core material, (2) Core material is gripped and stretched along the V groove of two rolls with multiple V grooves along the shape of figure 8. A mechanism for feeding, (3) A mechanism for gripping and winding the core material along a V-shaped groove of a double roll having a plurality of V-grooves along the shape of figure 8, (4) Extending the core material In the state, the conductor wire is wound in parallel with the core material, and (5) In the state where the core material is stretched, the conductor wire is alternately passed through the inside and outside of the conductor wire in the direction opposite to the winding direction. Using a stringing machine (16 punches) equipped with a mechanism for winding the filamentous material, with a 1.7 mm diameter EPDM rubber (Okayasu Rubber Co., Ltd.) stretched twice, PVC PVC Wire AWG28 (UL1571 manufactured by Sumitomo Electric Co., Ltd.) was continuously wound in the state where the expanded state was maintained after turning EW167dt for 8 turns in the opposite direction to four in the Z direction. Using a 16 cord machine, 8 EW 330 dt insulation fibers were placed in the S direction and 8 in the Z direction, and the outer coating was pulled up to obtain a stretchable cord. The maximum elongation was 40%, and the recovery was 85%.

The elastic cord 20 was cut out by 80 cm, attached to the AC adapter case shown in FIG. 1 as an example, wound around four times so as not to sag, and the cord 20 was fixed with an adhesive tape at the tip of the connector 30. In this state, a paper tape having a width of 3 mm (the width of the cord wrapping portion is 13% thinner than 4 mm) is wound along the outermost peripheral cord, and a mark indicating the boundary of the hunting portion in the area indicated by reference numeral 2 in FIG. Wearing. The paper tape was removed, the distance between the marks was measured, and the outermost peripheral distance (L1) was determined to be 20 cm.
Further, the cord was unwound and the distance between the root of the plug portion and the cord extraction portion was determined to be 72 cm.

Next, the USBmicro connector 30 is attached to the tip of the elastic cord, and a heat shrink tube is attached to the 69.5 mm portion so that the distance from the connector base portion 41 to the cable take-out portion is 69 cm. A brass ring with an outer diameter of 4.5 mm was hung and a crimping tool was used to prevent caulking. The cord 20 was cut at the tip of the crimped portion 2 cm, the conductor was drawn out from the inside, and the two cores of the four cores were connected to the positive side and the negative side of the AC adapter, and an AC adapter case was attached.
The above 69 cm is 3 cm shorter than the natural length of 72 cm (L). The value of 3 cm was determined as follows:
Natural length L: When the cord is wound without being expanded or contracted, the connector portion or the plug portion just fits in the connector housing portion or the plug housing portion from the cord extraction portion to the base portion of the connector portion or the plug portion (the root of the connector portion) 1 is the length up to 31 in FIG. 1 and the root of the plug portion is shown as 41 in FIG.
From L1 (outermost circumference distance) × 0.05, L × maximum extension rate of stretchable wire (%) × 0.8 is shown. In this case, 20 cm (L1) × 0.05 = 1 cm 2 or more, 72 cm (L) × maximum elongation rate (40 (%)) / 100 × 0.8 = 23 cm or less, and in this case, 3 cm shorter.
The inside of the AC adapter was shaped so that the cord was taken out obliquely, and the bending R of the takeout part was 6 mm on the winding side and 2 mm on the opposite side.

The shape of the AC adapter is shown in FIGS.
FIG. 1 is a diagram illustrating an example of an AC adapter for a smartphone or a mobile phone, in which (1) shows a cross-sectional view seen from the connector housing portion side, and (2) shows a state in which a cord is extended. (3) is a plan view (symbol 10) viewed from the power cord side of the electronic apparatus 1 (AC adapter in this example), and (4) is another mounting position mode of the power plug. .
FIG. 2 is a view showing an example of an AC adapter for a personal computer. (1) shows a cross-sectional view of the power plug storage portion and the connector storage portion side, and (2) shows that both cords are extended. It is a figure which shows a state.
FIG. 3 is a view showing an example of a stick type AC adapter. (1) is a cross-sectional view of the stick-type AC adapter as viewed from the connector housing portion side, and (2) is a view of the power cord from the side where the cord is extended. FIG.
The primary side of the AC adapter has a shape with a female terminal to which a cord connected to a 100V outlet can be connected.

Comparative Example: Using a commercially available cable (AWG25-2C) (width 4 mm, thickness 2.5 mm), measuring the distance from the cable take-out part and the boot base 31 of the connector position to the 110 cm cord in the same manner as in Example 1. Then, after attaching the USBmicro (30) connector, the cable was attached to the AC adapter so that the distance from the connector root portion (31) to the cord extraction portion was 107 cm.
The length of the cord is 1.3 to 1.4 times longer than that of the elastic cord because the commercial cord does not stretch.

When the cord of the AC adapter thus completed was wound, in Example 1, it could be easily and neatly wound, and the USBmicro connector could be fitted into the connector housing.
On the other hand, the comparative example did not reach the connector housing portion at the first time, but was able to be wound up several times and finally set in the connector housing portion.

When the left and right bending tests were performed at an angle of 120 ° in the winding direction and 60 ° in the unwinding direction at a speed of once per second, the disconnection life of the finished AC adapter cord extraction part was 100,000 in both examples. Although the wire was not disconnected even after a lapse of time, the comparative example was disconnected at less than 10,000 times.

  Thus, it can be seen that the present invention realizes an electronic device with a cord (for example, an AC adapter) that is hard to be disconnected, has a small cord storage space, and can be easily stored.

  The present invention relates to communication and sound equipment such as an AC adapter, a mouse, an external DVD player such as a personal computer and a smartphone, an earphone, a head-mounted display, an intercom, and a household appliance such as a hair dryer, and a power tool. It is possible to provide an electric product that is difficult to break, has a small cord storage volume, and can easily store a cord.

DESCRIPTION OF SYMBOLS 1 Electronic device 2 Recess for accommodating cord 3 Distance from surface closer to side surface 10 Surface provided with power plug housing portion of electronic device 20 Cord 30 Connector 31 Connector housing portion 32 Connector base portion 40 Power plug 41 Power plug base 50 Cord outlet

Claims (6)

  An electronic device with a cord having elasticity, having a recess for winding the cord, and having a portion for taking out the cord in the recess, and further, the cord taking-out portion is wound A corded electronic device characterized by having a curved surface along a direction and having a recess for receiving a connector portion or a plug portion at the tip of the cord.   The corded electronic device according to claim 1, wherein the cord has elasticity of 10% or more.   The electronic device with a cord according to claim 1 or 2, wherein a curved surface of the cord extraction portion from the electronic device has a radius of curvature R> 1 mm.   The cord-attached electron according to any one of claims 1 to 3, wherein the cord take-out portion is inclined with respect to a winding direction of the cord and a direction in which the cord is easily wound is determined. machine.   The corded electronic device according to claim 4, wherein a housing portion of the connector portion or the plug portion is separated from a corner portion nearest to the cord winding direction by 10 mm or more. When the length of the outermost circumference when the cord is wound is L1, the length of the cord from the cord take-out portion to the connector portion or the plug portion at the tip of the cord is a natural length L (L: the cord is not expanded or contracted) The length from the cord take-out part to the base part of the connector part or the plug part when the connector part or the plug part fits in the connector housing part or the plug housing part without the expansion and contraction of the cord when wound on the cable)
The corded electronic device according to any one of claims 1 to 5, which is shorter by L1 × 0.05 to L × extension wire maximum elongation rate (%) / 100 × 0.8.

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