JPH0412832Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention is a corner pole for a vehicle that is installed inside the bumper of a vehicle, has a telescopic multi-stage pole that extends upward from the installation point, and lights up a lamp at the tip to clearly indicate the corner of the vehicle to the driver. It is related to the device.

[Conventional technology]

This type of corner pole device for vehicles includes:
The drive cord connected to the end pole of the telescopic multi-stage pole is formed with easy teeth, and a drive gear is meshed with the drive cord, so that the telescopic multi-stage pole is extended and contracted by the drive of the gear. There is. The advantage of the above structure is that the drive cord is wound around the winding drum and the winding and unwinding operations control the expansion and contraction of the telescopic multi-stage pole.
The push-up force is large and reliable feeding is possible, so
This is advantageous in countermeasures against freezing and wind pressure while driving.

[Problem that the invention attempts to solve]

However, when using a drive cord with hook teeth as described above, there are the following problems. In other words, the drive cord uses a conductive material for power supply, such as a metal wire such as a copper wire, as the core wire, and the outer covering material is made of synthetic resin, but the core wire is not subject to repeated bending or Weak against local buckling. This is caused by the difference in the elastic limit due to the difference between the core wire material and the foreskin material.If bending force is applied to the drive cord and buckling occurs, if this is considered locally, the core wire and Both foreskin materials are subjected to compressive force on one side and tensile force on the other side, but since the foreskin material is made of synthetic resin,
Following compression and tension forces, it deforms in an elastic deformation region and has a restoring force.On the other hand, because of its rigidity, the core wire reaches a plastic deformation region, and one side stretches due to the tensile force during bending. Even if the drive code returns to the straight-ahead state, it will not restore to its original state. Since such a phenomenon occurs on other sides, if these are repeated, the core wire becomes locally brittle or deformed into thinner parts, leading to wire breakage. For this reason, although the drive cord is capable of driving a telescopic multi-stage pole, it is not possible to turn on the lamp, and it is not possible to discover the location of the disconnection or the cause of the power outage. This phenomenon is based on the difference in material between the core wire and the foreskin material, but what is particularly problematic is that the core wire does not pass through the center of the foreskin material (see Figures 5 a and b). ). This is a point that has been taken into account since the rack teeth are formed on one side of the drive cord, but for this reason, when bending force or buckling occurs in the drive cord, a large tensile force or compression force is applied to the core wire. This is the point that results in the application of force. Another problem when using the drive cord is that power must be supplied to the lamp from one end of the drive cord, and power must be supplied from the other end. In other words, the viewing angle of a vehicle's corner pole differs depending on the shape of the vehicle body, so a short one is about 30 cm, a long one is about 70 cm,
Naturally, the size of the drive cord will be larger accordingly. The relatively long drive cord can be wrapped around a drum, or it can be left hanging, but in either case, power must be supplied from the end of the cord. When the above drive cord is terminated using a drum type, a contact structure is required on the drum side to constantly supply power to the end of the drive cord, and when the drive cord is terminated using the drip type, the location where this is accommodated is required. A structure is required to prevent rainwater from splashing and to prevent dust. For this reason, the corner pole device has the drawbacks of a complicated structure and an increase in size. However, the corner pole device is an optional part that must be installed using the dead space inside the bumper so that it is not exposed to the outside, and it must be installed avoiding the genuine parts of the vehicle that are already installed. There is a destiny, and miniaturization is an important issue. The present invention was developed based on the above circumstances, and includes improvements to the structure of the drive cord so that the core wire is not affected by bending or buckling of the cord and maintains mechanical strength. This device is designed to satisfy the conditions for a corner pole device by making it possible to change the power supply mode so that power can be supplied even from the middle of the corner.

[Means to solve the problem]

Therefore, in the present invention, the drive cord connected to the tip pole of the telescopic multi-stage pole is formed with a rack tooth, and a drive gear is meshed with the rack tooth, and the telescopic multi-stage pole is driven by the gear. In the drive cord that allows the pole to expand and contract, the drive cord has a conductive core material in the center, a synthetic resin envelope covering the conductive core material, and has lug teeth formed therein. A part of the core material is exposed to the outside in the tooth groove area of the tooth,
The structure is such that power is supplied to the core material from the exposed portion.

[Effect]

Therefore, since the drive cord has a core wire located at its center, even if it is bent or buckled, the compressive and tensile forces applied to the core wire are relatively small and usually do not reach the plastic limit. , durability is improved, and since power can be supplied from the part of the core wire exposed at the position of the tooth groove of the rack teeth, it can be realized in a form that does not need to be taken from the end of the drive cord. With such advantages,
As a corner pole device, it can satisfy necessary conditions such as simplified structure and miniaturization.

【Example】

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In the figure, symbol B is a bumper, and this corner part has a telescopic multi-stage pole P.
is arranged, and a drive device H for extending and retracting it is installed in the bumper B. The drive device H is connected to the upper side 1 of the bumper B.
A drive unit housing 3 made of synthetic resin is suspended through a bracket 2, and a metal pole storage cylinder 5 is provided upright on one side of the housing 3, and its upper end is connected to the bumper B. It passes through the upper side part 1 of and opens upward. Housing 3 above
A neck fitting 4 is provided to surround the upper part of the pole storage tube 5, and by screwing the cap 6 into the neck fitting 4, the packing 2 is removed.
The pole storage tube 5 is fixed to the upper side portion 1 via 1 and 22. The above-mentioned telescopic multi-stage pole P has the above-mentioned pole storage cylinder 5.
cylindrical tip poles 7a each housed within;
It has an intermediate pole 7b and a proximal pole 7c, which are slidably fitted into each other. The tip pole 7a is provided with a socket 9 for mounting a lamp 8 therein, a lamp cover 10 is attached to the tip, and a drive cord 11 is connected to the base end. The drive cord 11 has a foreskin material 1 made of synthetic resin such as Jyuracon around the core wire 11a.
1b, a rack tooth 11c is formed on one side of the foreskin material 11b, and a part of the core wire 11a is exposed at the tooth groove of the rack tooth 11c. Such a drive code 11 is
Immediately after the foreskin material 11b is extruded against the core wire 11a by extrusion molding, the foreskin material 11b is molded by pressing the rack teeth 11c against it. In this case, the core wire 11a is located at the center of the drive cord 11, and the material is, for example, carbon fiber or conductive fibers with a similar function knitted in a cross, or an aggregate of a plurality of twisted fibers. used. The use of such a material is advantageous because it has high tensile strength and high elastic modulus, prevents the drive cord 11 from breaking, improves resilience when buckled, and strengthens the entire cord. be. In addition, since the core wire 11a is located at the center of the cord, its cross-sectional area can be increased.
It is possible to aim for a greater reinforcing effect. The drive cord 11 is bent in a right angle direction along a slide guide 12 provided at the lower part of the housing 3 and a drive gear 13 that meshes with the rack teeth 11c, and is inserted into a storage case 14 extending rearward from the lower part of the housing 3. It's becoming more and more guided. The housing 3 is equipped with a motor 15, which receives power from the vehicle via a power supply line 16.
5, a worm gear 18 that meshes with the worm 17, and a reduction gear train 19 that receives power from the worm gear 18, decelerates it, and transmits it to the drive gear 13. In addition, a gear 20 made of a conductive material that also serves as a power supply contact is prepared in line with the drive gear 13.
The easy tooth 11c is in contact with the exposed part of 1a.
The gears 20 are meshed with each other, and electric power is supplied to the gear 20. In such a configuration, when the drive gear 13 is driven by the motor 15 and is rotated forward or reverse at a speed reduced by the reduction gear train 19, the drive cord 11 pushes up or down the tip pole 7a. With this, drive code 11
are taken in and out of the storage case 14. on the other hand,
Rack tooth 11c in the drive cord 11
Since power is supplied to the core wire 11a through the gear 20 meshing with the core wire 11a, the lamp can be lit. As for the drive cord 11, as mentioned above, since the core wire 11a passes through the center of the cord, even if bending force or buckling is applied to the cord, the tensile force and compressive force applied to the core wire 11a are minimized. Because it is held in place, the elastic limit is not exceeded, the restoring force is ensured, and embrittlement is avoided.
Durability can be improved. Further, since power can be supplied from any part of the drive cord 11, a complicated and large structure unlike the conventional one is not required. Even if the core wire 11a is cut, the broken point can be identified by checking to what position the pole is pulled out and the lamp 8 goes out. In addition, in the above embodiment, in addition to the drive gear 13, a gear 20 for feeding power to the core wire 11a is provided.
However, the drive gear 13 may be made of a conductive material and may be used for both purposes by supplying power thereto. Further, a gear 20 is provided in the exposed portion of the core wire 11a.
In order to increase the strength and durability of this part, it is preferable to provide at least the exposed part of the core wire 11a with a durable coating made of a conductive material.

[Effect of the idea]

As described in detail above, the present invention improves the durability of the core wire against bending and buckling by improving the configuration of the drive cord, increases the strength of the cord, and allows By achieving this, there is no longer a need to supply power from the drive cord terminal as in the past, making it possible to downsize and simplify the device, and facilitate measures such as dustproofing and waterproofing.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention;
2 is a sectional view taken along the - line in FIG. 1, FIG. 3 is an enlarged sectional view of the main part, FIGS. Figures a and b are side and cross-sectional views of the drive cord. B... Bumper, P... Telescopic multi-stage pole, H...
...Drive device, 7a...Tip pole, 7b...Middle pole, 7c...Proximal pole, 8...Lamp, 1
1... Drive cord, 11a... Core wire, 11b
...Foreskin material, 11c...Rack teeth, 13...Drive gear, 20...Gear.

Claims (1)

[Scope of utility model registration request] The drive cord connected to the tip pole of the telescopic multi-stage pole has rack teeth, and the drive gear is meshed with the rack teeth.
In the structure in which the telescopic multistage pole is extended and retracted by driving the gear, the drive cord has a conductive core material in the center and is easily attached to a synthetic resin wrapper covering the conductive core material. A corner pole device for a vehicle, characterized in that a tooth is formed, a part of the core material is exposed to the outside in a tooth groove portion of the rack tooth, and power is supplied to the core material from the exposed portion. .