JP2023083087A - Power supply cable for pet camera - Google Patents

Abstract

To maintain flexibility of a power supply cable, and smoothly round the power supply cable.SOLUTION: A power supply cable for a pet camera is mounted on an installation surface and is connected to a pet camera for suppressing overturn due to external force from the side, and includes an electric wire having a conductor coated with an insulation material and having a circular or flat outer peripheral shape, a tube having flexibility and having inner-outer peripheral shape formed in a circle, and in which the electric wire is inserted to the inner diameter side, and a coil spring having a spirally wound elastic wire material and having inner-outer peripheral shape formed in a circle, and in which an outer diameter side is inserted to an inner diameter side of the tube with a first gap, and the electric wire is inserted to the inner diameter side with a second gap. The coil spring has a sparse coil part in which a pitch of an elastic wire material is longer than a pitch of an elastic wire material of a dense coil part provided in a part of the dense coil part with a narrower pitch of the elastic wire material.SELECTED DRAWING: Figure 7

Description

The present disclosure relates to power cables for pet cameras.

2. Description of the Related Art Conventionally, there has been known a network camera device placed indoors for photographing a pet (see, for example, Patent Document 1). This network camera device includes a water container for feeding water to the pet, a food container for feeding the pet, a camera unit for photographing the pet and acquiring the pet image, and connecting to a network. A network unit for performing data communication including transmission of pet images to a client, a control unit for controlling each unit of the device, and at least a camera unit are separated upward by a predetermined distance from the water container and/or the food container. A holding portion for holding.

JP 2013-223033 A

By the way, if a power cable used for a conventionally known AC adapter is used in the network camera device for photographing a pet (hereinafter simply referred to as a pet camera), pets such as cats and dogs can be mischievous. They can chew on the power cable. Therefore, a tube through which an electric wire covered with an insulating material is inserted, and an elastic wire rod are helically wound and inserted through the inner diameter side of the tube with a first gap and with a second gap on the inner diameter side. A power cable for a pet camera has been proposed, which includes a coil spring through which an electric wire is inserted. According to this pet camera power cable, when the pet bites the tube and the tip of the tooth penetrates the tube, the penetrating tooth hits the coil spring, and the coil spring escapes through the enlarged first gap, and the insulating material by the tooth rupture and penetration of the

However, a coil spring in which an elastic wire is tightly wound has a general characteristic that the entire length is extended by being rolled. For this reason, if you try to roll the power cable many times, the internal cable body does not stretch, and only the coil spring stretches. can accumulate), become inflexible, and make the entire power cable difficult to roll.

The present disclosure has been devised in view of the conventional situation described above, and an object of the present disclosure is to provide a power cable for a pet camera that maintains the flexibility of the power cable and can be smoothly rolled.

The present disclosure is a power cable for a pet camera that is placed on an installation surface and connected to a pet camera that suppresses overturning due to external force from the side, wherein the conductor is coated with an insulating material and has a circular or circular outer peripheral shape. A flat electric wire, a flexible tube having a circular inner and outer peripheries and an inner diameter side through which the electric wires are inserted; a coil spring that has a first gap on the radial side and is inserted through the inner diameter side of the tube, and has a second gap on the inner diameter side that allows the electric wire to pass through; To provide a power cable for a pet camera, in which a part of a dense coil part having a narrow pitch is provided with a sparse coil part in which the pitch of the elastic wire rod is longer than that of the elastic wire rod of the dense coil part.

Further, the present disclosure is a power cable for a pet camera that is placed on an installation surface and connected to a pet camera that suppresses overturning due to external force from the side, wherein the conductor is coated with an insulating material and has an outer peripheral shape A circular or flat electric wire, a flexible tube having a circular inner and outer peripheral shape, an inner diameter side through which the electric wire is inserted, and an elastic wire rod spirally wound to have a circular inner and outer peripheral shape. a coil spring that has a first gap on the outer diameter side and is inserted into the inner diameter side of the tube, and has a second gap on the inner diameter side that allows the electric wire to pass through the coil spring; Provided is a power cable for a pet camera, which is provided with a coil-excluded portion where the wire is exposed by shortening a spring.

According to the present disclosure, the power cable can be smoothly rolled while maintaining its flexibility.

1 is an external perspective view of a pet camera to which a power cable for a pet camera according to Embodiment 1 is connected, viewed from the front side; FIG. Side cross-sectional view of the main part of the pet camera to which the power cable for the pet camera is connected Appearance perspective view of the pet camera shown in FIG. 1 as seen from the rear side Top view of power cable Enlarged perspective view of the main part of the cable body Sectional view of the cable body cut along a plane orthogonal to the longitudinal direction Cross-sectional view of the cable body cut along a plane orthogonal to the longitudinal direction when the pet bites The side view which shows an example of an excess length absorption part The side view which shows the modification 1 of an excess length absorption part The side view which shows the modification 2 of an excess length absorption part The side view which shows the modification 3 of an excess length absorption part The side view which shows the modification 4 of an excess length absorption part Principal part side cross-sectional view of the extra length absorbing part shown in FIG. The side view which shows the modification 5 of an excess length absorption part The side view which shows the modification 6 of an excess length absorption part Explanatory diagram showing the biting action by a pet in order of increasing damage from (A) to (E) Side cross-sectional view of essential parts of a pet camera connected to a conventional power cable using a casing tube Side sectional view of essential parts of the pet camera connected to the power cable for the pet camera top view of rolled power cable Enlarged view of the main part showing the gap that occurs in the coil spring of the rolled power cable

Hereinafter, embodiments specifically disclosing a power cable for a pet camera according to the present disclosure will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially the same configurations may be omitted. This is to avoid unnecessary verbosity in the following description and to facilitate understanding by those skilled in the art. It should be noted that the accompanying drawings and the following description are provided for a thorough understanding of the present disclosure by those skilled in the art and are not intended to limit the claimed subject matter.

FIG. 1 is an external perspective view of a pet camera 11 to which a pet camera power cable 13 according to Embodiment 1 is connected, viewed from the front side. The power cable 13 for the pet camera according to Embodiment 1 (hereinafter simply referred to as "power cable 13") is suitably used for power supply to the pet camera 11, which is an indoor camera, for example. In other words, the power cable 13 can be used for all electrical products installed in a space where pets such as dogs and cats may come into contact.

Prior to the description of the power cable 13, the general configuration of the pet camera 11 used as an example of an electrical product to which the power cable 13 is connected will be described.

The pet camera 11 has a cylindrical base cabinet 17 below the upper cabinet 15 . The upper cabinet 15 has an imaging section 21 with a lens 19 . Lens 19 is arranged on cylindrical surface 25 of imaging housing 23 . The imaging unit 21 is tilt-rotated by a tilt mechanism (not shown) by an angle corresponding to the size of the imaging aperture 27 .

A plurality of pet detection sensors 29 are provided on the upper side surface of the upper cabinet 15 . Each of the plurality of pet detection sensors 29 (for example, an infrared sensor) is connected to a control unit (not shown) provided inside the upper cabinet 15, and outputs the detected heat source position to the control unit as the position of the pet. . Based on the input position of the pet, the control unit drives the tilt motor (not shown) or the pan motor 31 (see FIG. 2) so that the pet is positioned within the imaging area of the imaging unit 21, and the upper cabinet 15 is moved. Pan rotation is performed, and the imaging unit 21 is tilt-rotated.

FIG. 2 is a side cross-sectional view of the pet camera 11 to which the power cable 13 for the pet camera is connected. The pet camera 11 is placed on an installation surface 33 (see FIG. 16), and has a suction cup unit 35 that sticks to the installation surface 33, and has a fall prevention function (fall prevention function) that suppresses overturning due to external force from the side. prevention structure). The base cabinet 17 has a suction cup unit 35 inside. In the pet camera 11, the base cabinet 17 is installed on a flat installation surface 33 such as a chest of drawers 37 (see FIG. 16), a bookshelf, or a table top through a suction cup unit 35. As shown in FIG. In the suction cup 39 provided in the suction cup unit 35 , the internal space 41 opens at the outer peripheral portion of the upper opening portion 43 and the outer peripheral portion of the lower opening portion 45 . When the pet camera 11 is installed on the installation surface 33 by the user, the outer peripheral portion of the upper opening 43 of the suction cup unit 35 supports the load of the mechanical system (not shown) mounted in the pet camera. It is blocked by the holder 47 . The motor holder 47 is subjected to the load of the mechanism of the pet camera 11 including the pan motor 31 (not shown, see above). In addition, the overturn prevention structure (see above) of the pet camera 11 is such that the suction cup 39 having the upper opening 43 and the lower opening 45 and the outer periphery of the upper opening 43 are moved by the mechanism (not shown, see above). , the outer peripheral portion of the lower opening 45 is sealed by the installation surface 33 to function.

When the pet camera 11 is installed on the installation surface 33 and lifted by the user in the vertical direction, the motor holder 47 covering the upper opening 43 of the suction cup 39 rises. Then, the upper opening 43 of the internal space 41 of the suction cup 39 is opened, and the internal space 41 of the suction cup 39 is no longer a closed space. Therefore, the pet camera 11 can be easily lifted.

On the other hand, the pet camera 11 receives an external force from the side on the upper cabinet 15 when the pet snuggles up to it or touches it. At this time, the motor holder 47 placed on the suction cup unit 35 is tilted without being lifted vertically. When the motor holder 47 is tilted, the pet camera 11 is elastically deformed so that the outer periphery of the lower opening 45 of the suction cup 39 is peeled off from the installation surface 33 . This elastic deformation is deformation that increases the volume of the internal space 41 in the suction cup 39 . As a result, the suction cup 39 with the outer periphery of the lower opening 45 and the outer periphery of the upper opening 43 closed has a negative pressure in the internal space 41 compared to the atmospheric pressure, and the state of adsorption to the installation surface 33 is reduced. can be maintained. As a result, even if the pet camera 11 receives lateral external force, it is possible to prevent the pet camera 11 from overturning.

FIG. 3 is an external perspective view of the pet camera 11 shown in FIG. 1 as seen from the rear side. A power cable 13 for supplying power from the outside can be connected to the pet camera 11 having an overturn prevention function. A recess 49 for connecting one end of the power cable 13 is formed in a part of the base cabinet 17 in the circumferential direction. A DC jack 51 is attached to one terminal of the power cable 13 . The DC jack 51 is inserted from the recess 49 into a DC jack insertion port 53 (see FIG. 2) arranged at the bottom of the upper cabinet 15 and connected to the pet camera 11 . This enables electrical continuity between the power cable 13 and the pet camera 11 , so that power is supplied to the pet camera 11 via the power cable 13 .

4 is a plan view of the power cable 13. FIG. The DC jack 51 described above is attached to one end of the cable body 55 of the power cable 13 . The length of the cable body 55 is L, and the DC jack 51 has a jack housing 57 integrally molded with insulating resin. The jack housing 57 projects a jack 59 as an electrical contact portion at its tip. By inserting this jack 59 into the DC jack insertion port 53 , the pet camera 11 can be powered through the power cable 13 .

In the jack housing 57, a shaft-shaped wire lead-out portion 61 is formed in a direction orthogonal to the projecting direction of the jack 59. As shown in FIG. A wire 63 (see FIG. 5) connected to the jack 59 is led out of the jack housing 57 from the wire lead-out portion 61 . A portion of the electric wire 63 led out from the jack housing 57 is covered with a boot portion 65 integrally formed with the jack housing 57 . The boot portion 65 is tapered from a cylindrical portion having substantially the same outer diameter as that of the wire lead-out portion 61 of the jack housing 57 to a smaller diameter in the wire lead-out direction. The boot portion 65 is provided with a plurality of circumferential grooves in a multi-stage shape, thereby increasing the tensile strength and bending strength of the wire lead-out portion 61 while having flexibility.

The other terminal of the cable main body 55 is connected to an AC/DC converter (for example, an AC adapter 67). The AC adapter 67 has a rectangular parallelepiped adapter housing 69 made of insulating resin. The adapter housing 69 accommodates a conversion circuit (not shown) inside. The electric wire 63 of the cable body 55 is connected to the secondary power supply circuit in the conversion circuit of this adapter housing 69 .

The electric wire 63 is also covered by the same boot portion 65 as described above, which is integrally fixed to the adapter housing 69 even in the vicinity of the adapter housing 69 . The adapter housing 69 is provided with a pair of plug terminals 71 connected to the primary circuit of the conversion circuit protruding parallel to each other on one surface orthogonal to the surface to which the electric wire 63 is connected. The plug terminal 71 of the AC adapter 67 is inserted into, for example, an electrical outlet supplied with commercial power at home.

In the power cable 13 with the plug terminal 71 inserted into the outlet, AC power input from the plug terminal 71 is converted into DC power by a conversion circuit and fed to the pet camera 11 from the jack 59 .

Although the power cable 13 is described as a cable for secondary power supply in the first embodiment, the power cable 13 does not include the DC jack 51 or the AC adapter 67, and other types of cables are attached to both ends of the cable body 55. A connector may be connected. Moreover, the power cable 13 can be used not only for the secondary power source described above, but also for the primary power source by appropriately changing the specifications of the electric wire 63 .

FIG. 5 is an enlarged perspective view of the main part of the cable body 55. As shown in FIG. FIG. 6A is a cross-sectional view of the cable body 55 taken along a plane orthogonal to the longitudinal direction. FIG. 6B is a cross-sectional view of the cable body 55 taken along a plane orthogonal to the longitudinal direction when the pet bites. A cable body 55 of the power cable 13 is composed of an electric wire 63 , a tube 73 and a coil spring 75 .

The electric wire 63 is formed in a circular outer peripheral shape by covering a conductor 77 with an insulating material 79 . Note that the electric wire 63 may be formed in an outer peripheral shape other than circular as long as the conductor 77 is covered with an insulating material 79 . For example, the electric wire 63 may be formed in a flat outer peripheral shape by covering the conductor 77 with an insulating material 79 . The electric wire 63 may be single-core or multi-core. Conductor 77 may be solid, parallel, or stranded. The material of the conductor 77 may be copper, aluminum, or the like. The insulating material 79 may be made of fluororesin having good surface lubricity, vinyl chloride (that is, polyvinyl chloride; the same shall apply hereinafter), polyurethane, polyethylene, foamed polyethylene, or the like. In Embodiment 1, the electric wire 63 has two conductors 77 . In the electric wire 63 , each of the conductors 77 may be covered with an inner coating, and the outer periphery thereof may be collectively covered with an insulating material 79 . In addition, the electric wire 63 may be further covered with a jacket on the outer periphery of the insulating material 79 .

The tube 73 is flexible, has a circular inner and outer circumference, and has an inner diameter side through which the electric wire 63 is inserted. A soft tube is particularly preferably used for the flexible tube 73 . Examples of materials for the soft tube include soft vinyl (vinyl chloride, etc.), rubber, silicon rubber, and the like.

In Embodiment 1, the thickness of the tube 73 is set to, for example, 0.5 to 2.0 mm. Note that the thickness of the tube 73 is not limited to this.

Further, in Embodiment 1, the tube 73 is made of a transparent material such as soft vinyl. This transparent material may be any material as long as the coil spring 75 passed through it can be visually recognized. Note that the tube 73 does not have to be made of a transparent material.

The coil spring 75 is formed by spirally winding the elastic wire 81 to have a circular inner and outer peripheral shape. The coil spring 75 is inserted through the inner diameter side of the tube 73 with a first gap S1 (see FIG. 6A) on the outer diameter side. Also, the coil spring 75 has a second gap S2 (see FIG. 6) on the inner diameter side, through which the electric wire 63 is inserted. The material of the elastic wire 81 may be spring steel, phosphor bronze, stainless steel, hard resin, or the like. As an example, the coil spring 75 can have a wire diameter of φ0.3 to 2.0 mm and an outer diameter of φ4 to 10 mm. Note that the wire diameter and outer diameter of the coil spring 75 are not limited to these.

In Embodiment 1, the coil spring 75 is set such that adjacent wire rods are at a distance that prevents pet teeth 83 from penetrating the tube 73 (see FIG. 6B). Adjacent elastic wires may be in contact with each other. As an example, the coil spring 75 can have an average gap between elastic wires of 0 to 5.0 mm, more preferably 0 to 1.0 mm.

In the cable body 55, the electric wire 63, the coil spring 75, and the tube 73 are arranged concentrically in this order from the center side. Note that the cable body 55 is actually positioned inside the tube 73, where the coil spring 75 and the electric wire 63 are eccentric due to gravity or the like. The outer diameter of the electric wire 63 is D1. The coil spring 75 has an inner diameter of B2 and an outer diameter of D2. The tube 73 has an inner diameter of B3 and an outer diameter of D3.

A first gap S1 is provided between the inner diameter side of the tube 73 and the outer diameter side of the coil spring 75 by subtracting the outer diameter D2 of the coil spring 75 from the inner diameter B3 of the tube 73 . A second gap S2 is provided between the outer diameter side of the electric wire 63 and the inner diameter side of the coil spring 75 by subtracting the outer diameter D1 of the electric wire 63 from the inner diameter B2 of the coil spring 75 .

The first gap S1 of the cable body 55 of the power cable 13 is sufficient to move the coil spring 75 in the longitudinal direction of the ellipse in a deformed state in which the tube 73 is crushed radially inward to form an ellipse. distance is set.

The second gap S2 of the cable body 55 of the power cable 13 allows the electric wire 63 to move radially when the pet tooth 83 passing through the tube 73 reaches the inner diameter side of the coil spring 75. is set at a distance sufficient for

15A and 15B are explanatory diagrams showing the biting motions of a pet in the order of damage from (A) to (E). In this power cable 13, when the tube 73, which is the outermost material, is bitten by a pet from the outer diameter side (see FIG. 15A), the outer peripheral shape of the tube 73 made of a soft material is crushed and deformed into an oval or an ellipse. . On the inner diameter side of the tube 73 deformed into an ellipse or ellipse, a retraction space (that is, the first gap S1) in which the coil spring 75 can retract (shift or escape) expands in the major axis direction of the ellipse or ellipse. .

When the pet further chews the tube 73, the tip of the tooth 83 penetrates the tube 73 (see FIG. 15(B)). When the teeth 83 passing through the tube 73 hit the outer diameter side of the coil spring 75, the surface of the coil spring 75 having a circular outer peripheral shape harder than the tube 73 slides against the teeth 83 (see FIG. 15C). ). That is, the coil spring 75 shifts or escapes from the teeth 83 in the expanded first gap S1. The power cable 13 employs a soft material for the tube 73, and the outer diameter of the spring is sufficiently smaller than the inner diameter of the tube by providing the first gap S1, thereby increasing the space for the spring to escape. Further, since the tube 73 is also stretched when bitten, the coil spring 75 can escape through the enlarged first gap S1 (see FIG. 15(D)).

When the pet bites more strongly and deeply, the teeth 83 passing through the tube 73 enter between the adjacent elastic wires of the coil spring 75 (see FIG. 15(E)), but the coil spring 75 Since the outer diameter of the electric wire 63 is made sufficiently smaller than the inner diameter by providing the second gap S2, the electric wire 63 slips or escapes from the tooth 83 in the second gap S2, and the insulating material 79 is broken. and penetration are suppressed.

Due to these effects, the power cable 13 can protect the electric wires 63 more easily than the electric wires 63 with a protective cover made of only a resin or rubber tube. As a result, in the power cable 13 for the pet camera, it is possible to prevent the electric wire 63 from being broken due to the pet chewing on the electric wire 63, making it impossible to continue photographing the pet. At the same time, it is possible to prevent electric shocks of pets and fires caused by short circuits caused by electric shocks.

FIG. 16 is a side cross-sectional view of essential parts of pet camera 11 connected to a conventional power cable 87 using casing tube 85. As shown in FIG. A conventional power cable 87 that uses a flexible metal tube (for example, the casing tube 85) or the like is stiff and stiff, so it is difficult to bend and tends to have a large radius of curvature R1. In the conventional power cable 87, if the bent portion 89 with a large radius of curvature is forcibly bent small during wiring processing of the electric wire 63, the pet camera 11 may be tilted due to the elastic restoring force generated thereby. If the pet camera 11 is tilted in such a manner, the motor holder 47 may float to open the upper opening 43 of the suction cup unit 35, and the overturn prevention function may not work properly.

FIG. 17 is a side cross-sectional view of the pet camera 11 connected to the power cable 13 for the pet camera. On the other hand, the pet camera power cable 13 is more flexible and bendable than the conventional power cable 87, and the radius of curvature R2 is easily smaller than that of the conventional power cable 87 (R1>R2). In addition, the elastic restoring force that tends to return to a straight line generated in the bent portion 89 is small. Therefore, the power cable 13 does not cause the pet camera 11 to tilt due to the elastic restoring force generated in the bent portion 89, and the sucker unit 35 does not open. do not have. As a result, according to the power cable 13 for the pet camera, the sucker unit 35 can be maintained in the closed state, and the overturn prevention function of the pet camera 11 can be reliably exhibited.

The cable body 55 of the power cable 13 is provided between the DC jack 51 and the AC adapter 67 by inserting the outer diameter side of the tapered tip of the boot portion 65 into the inner diameter side at both ends of the coil spring 75 . The power cable 13 is provided between the DC jack 51 and the AC adapter 67 with both ends of the tube 73 covering the outer diameter side of the coil spring 75 having the tapered end of the boot portion 65 inserted into the inner diameter side. be done. It should be noted that the tube 73 may be formed in such a length that both ends thereof are not inserted into the boot portion 65 .

In addition to the structure described above, the power cable 13 for a pet camera according to Embodiment 1 includes the excess length absorbing portion 95 (for example, a sparse coil portion) shown in FIG. 1 in the coil spring 75 . The surplus length absorbing portion 95 is a portion that contracts with a looser coil pitch than the dense coil portion 93 . An arbitrary number of surplus length absorbing portions 95 are provided at arbitrary positions of the coil spring 75 . The surplus length absorbing portion 95 may be provided integrally with a portion of the coil spring 75 or may be provided separately from the coil spring 75 .

FIG. 7 is a side view showing an example of the excess length absorbing portion 95. As shown in FIG. Almost the entire length of the coil spring 75 is formed of a tightly coiled portion 93 in which the elastic wire rod 81 is in close contact. The surplus length absorbing portion 95 is provided integrally or separately on a portion of the dense coil portion 93 . The extra length absorbing portion 95 is provided in the dense coil portion 93 so that the pitch P of the elastic wire rods 81 is longer than the pitch P of the elastic wire rods 81 of the dense coil portion 93 . That is, in this example, the coil spring 75 spirally winds the same elastic wire rod 81, and continues to the dense coil portion 93 where the adjacent elastic wire rods are in close contact with each other, followed by the surplus length absorbing portion 95 with a long pitch P. be killed. That is, the dense coil portion 93 and the excess length absorbing portion 95 are integrally formed. Note that the dense coil portion 93 and the excess length absorbing portion 95 can be separate bodies.

Next, a modified example of the surplus length absorbing portion 95 will be described.

FIG. 8 is a side view showing Modification 1 of the surplus length absorbing portion 95. As shown in FIG. The excess length absorbing portions 95 are provided at both longitudinal ends of the dense coil portion 93 . The excess length absorbing portion 95 may be provided at one location on the coil spring 75 . In this case, one surplus length absorbing portion 95 reaches the jack 59 and the other surplus length absorbing portion 95 reaches the AC adapter 67 . Moreover, the surplus length absorbing portions 95 having the surplus length absorbing portions 95 at both ends are provided at a plurality of locations of the coil spring 75 . In this case, the coil spring 75 can intermittently arrange a plurality of surplus length absorbing portions 95 also in the intermediate portion in the longitudinal direction.

FIG. 9 is a side view showing Modification 2 of the surplus length absorbing portion 95. As shown in FIG. The surplus length absorbing portion 95 consists of only the one-end sparse coil 97 provided with the surplus length absorbing portion 95 at one end of the dense coil portion 93 and the dense coil portion 93 that is continuous with the surplus length absorbing portion 95 of the one-end sparse coil 97. and a close contact coil 99. In this case, the surplus length absorbing portion 95 is composed of at least two coils, a one-end sparse coil 97 and a tight coil 99 .

FIG. 10 is a side view showing Modification 3 of the surplus length absorbing portion 95. As shown in FIG. The surplus length absorbing portion 95 is composed of a double-ended sparse coil 101 in which the surplus length absorbing portion 95 is provided at both ends of the dense coil portion 93, and a pair of tight coils 99 that are in contact with and continue to both ends of the double-ended sparse coil 101. be done. In this case, the excess length absorbing portion 95 is composed of at least three coils 101 at both ends and two tight coils 99 . The excess length absorbing portions 95 may be provided at a plurality of locations on the coil spring 75 .

FIG. 11 is a side view showing Modification 4 of the surplus length absorbing portion 95. As shown in FIG. The surplus length absorbing portion 95 has a one-end sparse coil 97 and a one-end small-diameter close-contact coil 105 in which a small-diameter portion 103 having a diameter smaller than the diameter of the coil spring 75 of the close-coil portion 93 is provided at one end of the close-contact coil 99 . Then, the small-diameter portion 103 of the one-end small-diameter tight-fitting coil 105 is inserted into the inner diameter side of the excess length absorbing portion 95 in the one-end loose coil 97 . In this case, the surplus length absorbing portion 95 is composed of at least two, one one-end loose coil 97 and one one-end small-diameter tight-fitting coil 105 . The excess length absorbing portions 95 may be provided at a plurality of locations on the coil spring 75 .

FIG. 12 is a side cross-sectional view of the main part of the surplus length absorbing portion 95 shown in FIG. The surplus length absorbing portion 95 shown in FIG. 11 has an outer diameter of the small diameter portion 103 and an inner diameter of the surplus length absorbing portion 95 so as to smoothly slide at the connecting portion between the surplus length absorbing portion 95 and the small diameter portion 103. is preferably about 0.2 to 1.5 mm in the radial direction. Note that the clearance C between the outer diameter of the small diameter portion 103 and the inner diameter of the excess length absorbing portion 95 is not limited to this.

FIG. 13 is a side view showing Modified Example 5 of the surplus length absorbing portion 95. As shown in FIG. The surplus length absorbing portion 95 is configured by the coil exclusion portion 107 . The coil exclusion portion 107 is provided between the coil spring 75 and the electric wire 63 , and exposes the electric wire 63 by making the coil spring 75 shorter than the electric wire 63 . The coil exclusion portion 107 is provided so that the wire 63 is exposed by making the coil spring 75 shorter than the wire 63 . Although the coil spring 75 is in contact with the AC adapter 67 in the illustrated example, it may be in contact with the jack 59 . In this case, the excess length absorbing portion 95 may be fixed to the jack 59 , the AC adapter 67 or the electric wire 63 at the end of the coil spring 75 opposite to the coil removing portion 107 . The fixation is preferably single point. Further, if the coil exclusion portion 107 can be placed at an arbitrary position, the excess length absorbing portion 95 does not have to be fixed to any of the coil springs 75 .

FIG. 14 is a side view showing Modification 6 of the surplus length absorbing portion 95. As shown in FIG. The excess length absorbing portion 95 may be provided with coil removing portions 107 on both longitudinal sides of the coil spring 75 . In this case, the coil spring 75 may be fixed to the wire 63 with a second gap, for example, at the longitudinal center of the coil spring 75 . This fixation can be done, for example, by an elastic member that can expand and contract to some extent. Thereby, the coil spring 75 can be positioned while allowing movement with respect to the electric wire 63 .

Next, the action of the power cable 13 for the pet camera will be described.

The power cable 13 for the pet camera according to Embodiment 1 is connected to the pet camera 11 that is placed on the installation surface 33 and prevents overturning due to external force from the side. The pet camera 11 has a suction cup unit 35 that sticks to the installation surface 33 . When the pet camera 11 receives an external force from the side of the pet, the sucker unit 35 can be sucked to the installation surface 33 to prevent the pet camera 11 from overturning.

Specifically, the power cable 13 for a pet camera includes an electric wire 63 having a circular or flat outer peripheral shape in which a conductor 77 is covered with an insulating material 79, and a flexible, circular inner and outer peripheral shape. , a tube 73 through which an electric wire 63 is inserted on the inner diameter side, and an elastic wire rod 81 is spirally wound to form a circular inner and outer peripheral shape. and a coil spring 75 having a second gap S2 on the inner diameter side and through which the electric wire 63 is inserted. In the coil spring 75 , a surplus length absorbing portion 95 in which the pitch P of the elastic wire rods 81 is longer than the pitch P of the elastic wire rods 81 of the dense coil portion 93 is provided in a portion of the dense coil portion 93 where the elastic wire rods 81 are in close contact.

The power cable 13 for the pet camera has a flexible tube 73, for example, a soft tube, and the coil spring 75 is formed by winding an elastic wire rod 81. Therefore, the elastic restoring force at the time of bending is suppressed, and a large curvature is achieved. (ie, with a small radius of curvature).

As a result, the power cable 13 is softer and easier to bend than the conventional power cable 13 using a flexible metal tube (casing tube) or the like, so that the wiring process of the electric wire 63 is facilitated.

In addition, in the pet camera power cable 13 according to Embodiment 1, the coil spring 75 is provided in a part of the dense coil portion 93 where the pitch P of the elastic wire rods 81 is narrow. A surplus length absorbing portion 95 longer than the pitch P of the elastic wire 81 is provided.

The power cable 13 has a surplus length absorbing portion 95 in the coil spring 75 . That is, the coil spring 75 has a surplus length absorbing portion 95 in which the pitch P of the elastic wire 81 is wider than other portions. In other words, the excess length absorbing portion 95 is provided in a portion of the contact coil 99 to which the elastic wire rod 81 is in contact. The excess length absorbing portion 95 can ensure a large distance displacement in the compression direction due to the long pitch P compared to the close contact coil 99 whose distance displacement in the compression direction is almost zero.

18 is a plan view of the rolled power cable 13. FIG. FIG. 19 is an enlarged view of a main portion showing a gap generated in the coil spring 75 of the power cable 13 that is rolled up.

Here, as shown in FIG. 18, the amount of elongation of the coil spring 75 when the power cable 13 is wound will be considered. The extension amount ΔL of the coil spring 75 can be approximated by ΔL=(∫Δs×n)/2={(2×π×d)×L/(D×π)}/2. 19, n is the number of turns of the wound cable body 55 shown in FIG. 18, d is the average diameter of the coil spring 75, L is the length of the cable body 55 in the power cable 13 shown in FIG. 4, and D is the outer diameter (for example, about 100 mm) of the wound cable body 55 shown in FIG. According to the above formula, for example, the power cable 13 with d=Φ6.4 mm, D=100 mm, and L=1.5 m has an elongation amount ΔL of about 10 cm when wound. In this case, the clearance Δs is approximately 0.04 mm.

Therefore, the power cable 13 is provided with a shrinkable surplus length absorbing portion 95 (for example, a sparse coil portion) having a length of at least 10 cm or more, thereby reducing the elongation of the dense coil portion 93 that occurs when the power cable 13 is wound. can be absorbed. As a result, the coil spring 75, whose elongation is restrained by the cable body 55 (mainly the electric wire 63), accumulates stress in the elongation direction, reducing tension and suppressing difficulty in bending the entire power cable. can. As a result, the power cable 13 can be smoothly rolled while maintaining its flexibility.

Moreover, the power cable 13 for the pet camera may be provided with the surplus length absorbing portions 95 at both ends of the coil spring 75 in the longitudinal direction.

In this pet camera power cable 13 , there are long gap portions (that is, surplus length absorbing portions 95 ) at both ends of the coil spring 75 . In this power cable 13, the extension of the dense coil portion 93 can be absorbed by the surplus length absorption portions 95 at both ends in the longitudinal direction both when wound from the jack side and when wound from the AC adapter side. As a result, the power cable 13 is less likely to be stretched compared to the case where the excess length absorbing portion 95 is provided only on one side.

In the power cable 13 for a pet camera, the coil spring 75 has a one-end sparse coil 97 provided with a surplus length absorbing portion 95 at one end of the dense coil portion 93 and a surplus length absorbing portion 95 of the one-end sparse coil 97. and a close coil 99 consisting of only the close coil portion 93 that is continuous in contact with the coil.

In the power cable 13 for a pet camera, the coil spring 75 is configured by connecting the excess length absorbing portion 95 of the one-end sparse coil 97 to the close contact coil 99 in a continuous state. The one-end sparse coil 97 and the tight coil 99 are separate bodies. Therefore, the power cable 13 in this case is composed of at least two cables. In this power cable 13, the surplus length absorbing portion 95 can be easily and inexpensively provided in the middle portion in the longitudinal direction. Also, the power cable 13 can be easily provided with a plurality of surplus length absorbing portions 95 . In this power cable 13, the extension of the densely coiled portion 93 does not have to be absorbed at the ends in the longitudinal direction. It is possible to make it difficult to cause a difference in elongation absorption action due to a difference in

Also, in the power cable 13 for the pet camera, the coil spring 75 is in contact with and continues to both ends of the double-ended sparse coil 101 in which the excess length absorbing portions 95 are provided at both ends of the dense coil portion 93 . and a pair of contact coils 99.

In the power cable 13 for the pet camera, the coil spring 75 is composed of a double-end sparse coil 101 and a contact coil 99 connected to both ends of the double-end sparse coil 101 in a continuous contact state. The both-ends sparse coil 101 and the close contact coil 99 are separate bodies. Therefore, the power cable 13 in this case is composed of at least three cables. In this power cable 13, a plurality of surplus length absorbing portions 95 can be easily provided in the middle portion in the longitudinal direction. In addition, in this power cable 13, it is not necessary to absorb the elongation of the densely coiled portion 93 at one end in the longitudinal direction. It is possible to make it difficult to cause a difference in the elongation absorption action due to the difference in the winding direction.

Furthermore, in the power cable 13 for a pet camera, the coil spring 75 has a one-end sparse coil 97 and a one-end small-diameter close contact coil 105 having a small diameter portion 103 at one end of the close contact coil 99. The small-diameter portion 103 of the one-end small-diameter close contact coil 105 may be inserted into the inner diameter side of the excess length absorbing portion 95 .

In this power cable 13 for a pet camera, the coil spring 75 is composed of a one-end sparse coil 97 and a one-end small-diameter close contact coil 105 having a small diameter portion 103 at one end of the close contact coil 99 . The one-end sparse coil 97 and the one-end small-diameter tight-fitting coil 105 are connected by inserting the small-diameter portion 103 of the one-end small-diameter tight-fitting coil 105 into the inner diameter side of the excess length absorbing portion 95 of the one-end sparse coil 97 .

The one-end small-diameter tight coil 105 has a stepped portion 109 (see FIG. 12) at the boundary between the large-diameter dense coil portion 93 and the small-diameter small-diameter portion 103 . The extra length absorbing portion 95 of the one-end sparse coil 97 whose inner diameter side is inserted into the outer diameter side of the small diameter portion 103 contacts the stepped portion 109 of the one-end small-diameter tight-fitting coil 105 at its tip in the insertion direction.

Therefore, when the coil spring 75 is stretched by winding the power cable 13 , the surplus length absorbing portion 95 of the one-end sparse coil 97 is compressed between the stepped portion 109 and the dense coil portion 93 of the one-end sparse coil 97 . and the elongation will be absorbed.

In this power cable 13, the extra length absorbing portion 95 of the one-end loose coil 97 shrinks outside the small diameter portion 103, thereby absorbing the elongation of the dense coil portion 93 and making it difficult for the power cable 13 to be stretched. In addition, since the small-diameter portion 103 formed of the dense coil portion 93 exists on the inner diameter side of the excess length absorbing portion 95, even if the excess length absorbing portion 95 is bitten, the small diameter formed of the dense coil portion 93 The portion 103 can suppress penetration of the teeth 83 .

In the power cable 13 for the pet camera, a coil exclusion portion 107 is provided between the coil spring 75 and the electric wire 63 so that the electric wire 63 is exposed by making the coil spring 75 shorter than the electric wire 63 . good too.

In this power cable 13 for a pet camera, at least one end of the coil spring 75 in the longitudinal direction is provided with a coil exclusion portion 107 where the wire 63 is exposed by making the coil spring 75 shorter than the wire 63 . The end of the coil spring 75 can enter the coil exclusion portion 107 by movement or extension.

When the coil spring 75 is stretched by winding the power cable 13 , the end of the densely coiled portion 93 enters the coil exclusion portion 107 , thereby preventing accumulation of stress. This absorbs the elongation of the dense coil portion 93 and makes it difficult for the power cable 13 to be stretched. Since the power cable 13 can be configured using only the close contact coil 99 through which the teeth 83 are difficult to penetrate, the structure can be simplified.

Further, in the pet camera power cable 13 , coil exclusion portions 107 may be provided at both ends of the coil spring 75 between the coil spring 75 and the electric wire 63 .

In this power cable 13 for a pet camera, the coil spring 75 does not exist, and coil exclusion portions 107 are provided at both ends of the coil spring 75 for exposing the electric wire 63 . When the coil spring 75 is stretched by winding the power cable 13 , both ends of the dense coil portion 93 enter the coil exclusion portion 107 , thereby preventing accumulation of stress. This absorbs the elongation of the dense coil portion 93 and makes it difficult for the power cable 13 to be stretched. In addition, since the coil spring 75 has the coil exclusion portions 107 at both ends, it is possible to absorb the elongation of the dense coil portion 93 both when it is wound from the jack side and when it is wound from the AC adapter side. . As a result, compared to the case where the coil exclusion portion 107 is provided only on one side, it is possible to make it difficult to cause a difference in the effect of absorbing elongation due to a difference in the winding direction from the jack side or the AC adapter side.

Therefore, according to the power cable 13 for the pet camera according to the first embodiment, the power cable 13 can be smoothly rolled while maintaining its flexibility.

Although various embodiments have been described above with reference to the accompanying drawings, the present disclosure is not limited to such examples. It is obvious that a person skilled in the art can conceive of various modifications, modifications, substitutions, additions, deletions, and equivalents within the scope of the claims. It is understood that it belongs to the technical scope of the present disclosure. In addition, the constituent elements of the various embodiments described above may be combined arbitrarily without departing from the gist of the invention.

INDUSTRIAL APPLICABILITY The present disclosure is useful as a power cable for a pet camera that can be smoothly rolled while maintaining the flexibility of the power cable.

11 Pet camera 13 Power cable 33 Installation surface 63 Electric wire 73 Tube 75 Coil spring 77 Conductor 79 Insulating material 81 Elastic wire rod 93 Close coil part 95 Excess length absorbing part 97 Single end sparse coil 99 Close contact coil 101 Both ends sparse coil 103 Small diameter part 105 One end small diameter Close contact coil 107 Coil exclusion part

The present disclosure is a power cable for a pet camera that is placed on an installation surface and connected to a pet camera that suppresses overturning due to external force from the side, wherein the conductor is coated with an insulating material and has a circular or circular outer peripheral shape. A flat electric wire, a flexible tube having a circular inner and outer peripheries and an inner diameter side through which the electric wires are inserted; a coil spring that has a first gap on the radial side and is inserted through the inner diameter side of the tube, and has a second gap on the inner diameter side that allows the electric wire to pass through; A sparse coil portion in which the pitch of the elastic wire rods is longer than the pitch of the elastic wire rods of the dense coil portion is provided in a part of the dense coil portion having a narrow pitch, and the coil spring is provided at one end of the dense coil portion, The coil spring comprises a one-end sparse coil provided with the sparse coil portion, and a tight coil consisting only of the dense coil portion of the one-end sparse coil which is in contact with and continues to the sparse coil portion of the one-end sparse coil. and a one-end small-diameter tight-fitting coil having a small-diameter portion provided at one end of the tight-fitting coil, wherein the small-diameter portion of the one-end small-diameter tight-fitting coil is inserted into the inner diameter side of the loose coil portion of the one-end loose coil. , providing power cables for pet cameras.

Claims (7)

A power cable for a pet camera that is placed on an installation surface and connected to the pet camera that suppresses overturning due to external force from the side,
An electric wire having a circular or flat outer shape and having a conductor covered with an insulating material;
a flexible tube having a circular inner and outer peripheral shape and having an inner diameter side through which the electric wire is inserted;
An elastic wire rod is spirally wound to form a circular inner and outer peripheral shape, and the outer diameter side has a first gap and is inserted into the inner diameter side of the tube, and the inner diameter side has a second gap and the electric wire a coil spring that passes through the
The coil spring is provided with a sparse coil portion in which the pitch of the elastic wire rods is longer than the pitch of the elastic wire rods in the dense coil portion, in a part of the dense coil portion in which the pitch of the elastic wire rods is narrow.
Power cable for pet camera. The sparse coil portions are provided at both longitudinal ends of the coil spring,
A power cable for a pet camera according to claim 1. The coil spring includes: a one-end sparse coil having the sparse coil portion provided at one end of the dense coil portion; a tight coil consisting only of the dense coil portion that is continuous with the sparse coil portion of the one-end sparse coil; composed of
A power cable for a pet camera according to claim 1. The coil spring is composed of a double-ended sparse coil in which the sparse coil portions are provided at both ends of the dense coil portion, and a pair of the tight coils that are continuous in contact with both ends of the both-end sparse coils.
A power cable for a pet camera according to claim 3. The coil spring has the one-end sparse coil and a one-end small-diameter tight-fitting coil having a small-diameter portion provided at one end of the tight-fitting coil,
The small-diameter portion of the one-end small-diameter tight-fitting coil is inserted into the inner diameter side of the sparse coil portion of the one-end sparse coil,
A power cable for a pet camera according to claim 3. A power cable for a pet camera that is placed on an installation surface and connected to the pet camera that suppresses overturning due to external force from the side,
An electric wire having a circular or flat outer shape and having a conductor covered with an insulating material;
a flexible tube having a circular inner and outer peripheral shape and having an inner diameter side through which the electric wire is inserted;
An elastic wire rod is spirally wound to form a circular inner and outer peripheral shape, and the outer diameter side has a first gap and is inserted into the inner diameter side of the tube, and the inner diameter side has a second gap and the electric wire a coil spring that passes through the
Between the coil spring and the electric wire, a coil exclusion portion is provided in which the electric wire is exposed by making the coil spring shorter than the electric wire.
Power cable for pet camera. Between the coil spring and the electric wire, the coil exclusion part is provided at both ends of the coil spring,
A power cable for a pet camera according to claim 6.

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