JP3022902U - Leg structure of tripod - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the legs of a tripod used for installing a camera, etc. so that the platform can be easily leveled on a slope and its height can be easily adjusted. [Structure] The three legs 2 are swingably attached to a pedestal 11 constituting the platform 1 via a joint 23. Of the three leg portions 2, one leg portion 2a serves as a telescopic shaft having a four-stage structure composed of four short tubes 21, and the other two leg portions 2b and 2c are set to 3
It is configured as a three-stage telescopic shaft composed of one short tube 21.
Then, a collet 22 is provided at the node of each short pipe 21, and the leg portion 2 expands and contracts when the collet 22 relaxes, and the extension and contraction of the leg portion 2 is restricted when tightening.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tripod used for installing a camera or the like at a desired place, and more particularly to a tripod leg structure that is convenient to carry and adapts to a slope.

[0002]

[Prior art]

 It is common to use a dedicated tripod as a support means such as a photographing device such as a camera or a video camera, a surveying instrument, or a telescope. A tripod of that kind has three legs that support the platform, and the platform and camera can be fixed to it.

In particular, as the structure of the leg portion, conventionally, there is a structure in which all the leg portions are extendable / contractible shafts, or one leg is an extendable / contractible shaft and the other two legs are fixed shafts. FIG. 4 shows an example of a tripod in which all the leg portions A, B, and C are telescopic axes, and FIG. 5 shows one of the three leg portions A, B, and C as the telescopic axis, and the remaining 2 This is an example in which the two legs B and C are fixed shafts composed of a single shaft.

According to such a tripod, the three legs A, B, C are expanded to a required distance at the installation location to make the platform D horizontal, and, for example, the platform D is not shown. The camera can be fixed to take pictures of landscapes.

[0005]

[Problems to be solved by the device]

 However, according to the above-mentioned conventional tripod with two fixed legs as the fixed shaft, it is difficult to carry because the two legs are always extended, and it is difficult to make the platform horizontal when using. In addition, there are drawbacks such that it is difficult to adjust the height.

On the other hand, a tripod with all legs extending and retracting is convenient to carry when the legs are contracted, and when used, the legs can be extended to make the tripod head have a desired height. Although there is an advantage, since the maximum length of all legs is the same, it is difficult to level the pan head on a slope and it is difficult to adjust the height.

In view of the above-mentioned circumstances, the present invention has as its main object to make it possible to easily level the pan head and easily adjust the height thereof, especially on a sloping ground.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a tripod having three legs for supporting a platform, each leg being configured as a multi-stage telescopic shaft in which short pipes are sequentially fitted. A tripod leg structure, characterized in that one of the parts has more short tubes than the other two and is configured as the longest axis that maximizes the length when extended Is.

In particular, in the present invention, one of the legs is a telescopic shaft having a four-stage structure composed of four short tubes, and the other two legs are telescopic shafts having a three-stage structure composed of three short tubes. .

[0010]

[Action]

 According to the present invention, all the legs are in a contracted state, which is the most suitable form for carrying, and by extending the legs, it is possible to support a camera platform to which a camera is fixed at a desired height.

In particular, when extended, one leg extends more than the other two legs, so that the platform can be easily leveled on a sloping ground, and its height can be easily adjusted.

[0012] For example, when setting up a camera in a mountainous area to take a picture of a landscape or a person, the platform can be easily leveled by expanding and contracting each leg to adjust the length. The height can be easily adjusted. Especially, if the leg with the longest axis is oriented to the lower side of the slope and the other leg is oriented to the upper side of the slope, the platform can be fully opened to the desired extent even if the leg is wide open and stability is increased. Can be height.

[0013]

[Embodiment of device]

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a tripod for a camera as an example of the present invention.

In the figure, 1 is a platform, 2 is a leg, and this tripod for a camera has a configuration in which the platform 1 is supported by three legs 2a, 2b, 2c.

The platform 1 is composed of a pedestal 11 on which the upper ends of the legs 2 are pivotally mounted, an elevator 12 penetrating the pedestal 11, and a pedestal 13 provided on the upper end of the elevator 12. Of these, a handle 14 is attached to the gantry 11, and a rack 12a that meshes with a worm (not shown) operated by the handle 14 is formed on the elevator 12. Then, by rotating the handle 14, the elevator 12 can be moved up and down along its axis.

The pedestal 13 is swingably attached to the upper end of the elevator 12, and can be fixed at a required pitch angle by an operating lever 15 called a tilt lock. Further, 16 is an adjusting screw for rolling the upper part of the pedestal 13, 17 is a release lever for attaching and detaching the camera, 18 is a screw for mounting the camera, 19 is a guide for guiding the elevator 12 up and down. It is an axis.

On the other hand, the leg portion 2 is configured as a multi-stage telescopic shaft in which a plurality of short tubes 21 are sequentially fitted. In particular, one leg 2a of the three legs 2 has a larger number of short tubes 21 than the other legs 2b and 2c, and is configured as the longest axis that maximizes the length when extended. For example, the leg portion 2a has four short pipes 21 sequentially fitted to form a four-stage structure, and the other leg portions 2b and 2c have three short pipes 21 sequentially fitted to form a three-stage structure.

The short tube 21 is a cylinder made of a synthetic resin or a metal made of aluminum or stainless steel, and is slidably fitted into the upper short tube 21, respectively. For example, each short tube 21 has a total length of about 20 cm, the innermost tube 21 has an inner diameter of about 15 mm, and the second step short tube 21 fitted therein has an outer diameter of about 14 mm. The outer diameter is gradually reduced so that the short tube 21 on the side can be fitted into the short tube 21 on the upper side.

Reference numeral 22 is a collet provided at a node of each short pipe 21, and the leg portion 2 can be expanded and contracted when the collet 22 is loosened, and the state is maintained when tightened. Reference numeral 23 is a joint fixed to the uppermost short pipe 21, and the upper end of the joint 23 is pivotally attached to the pedestal 11 so that the leg 2 swings around the elevator 12. . Further, reference numeral 24 is an inverted conical end fitting fixed to the lowermost short tube 21.

Next, FIG. 2 is a partial sectional view showing a part of the leg portion 2 in an enlarged manner. As shown in this figure, a screw 25 is formed on the outer periphery of the lower end of the short tube 21 on the upper side, and a collet 22 is screwed thereto. A C-shaped pressure ring 26 made of synthetic resin or the like is built in the lower side of the collet 22, and when the collet 22 is tightened, the pressure ring 26 is crimped to the outer peripheral surface of the lower short tube 21. Therefore, the movement of the short pipe 21 in the axial direction is regulated.

Further, while the sleeve 27 is fixed to the outer periphery of the upper end of the lower short tube 21, a step portion 28 is formed on the inner periphery of the lower end of the upper short tube 21 so that the lower portion of the short tube 21 extends when the leg 2 extends. The tube 21 is not separated from the short tube 21 on the upper side.

Next, FIG. 3 shows a usage state of the tripod configured as described above. In particular, FIG. 3 shows an example of use in which the tripod is installed on a sloping ground, at which time the camera f is fixed on the pedestal 13 of the platform 1. The leg 2a, which is the longest axis, is oriented toward the lower side of the slope, and the other legs 2b and 2c are oriented toward the upper side of the slope.

Then, since the leg portion 2a extends from the other leg portions 2b and 2c, the platform 1 can be easily leveled and its height can be easily adjusted.

Here, the platform 1 can be adjusted in height by the elevator 12 and can be adjusted in angle by the operation lever 15 or the like, but if the elevator 12 is too high or is not in the vertical state, There is a risk of becoming unstable and falling. However, according to the tripod for a camera of this example, since the leg portion 2a is extended from the other leg portions 2b and 2c as described above, it is easy to make the tripod head 1 horizontal and adjust its height easily. In addition to widening the legs 2 to obtain high stability, the platform 1 can be set to a desired and sufficient height even in this state.

Particularly, in the case of a tripod having no movable shaft for height adjustment such as the elevator 12 and a tilt lock mechanism such as the operation lever 15, the leg structure as in the present application can greatly improve the convenience. .

Although a specific example of the present invention has been described above, as another form of the present invention, the leg portion 2a may have a five-stage configuration and the other leg portions may have a four-stage configuration.

As another combination, the leg portions 2b and 2c have a two-stage configuration, whereas the leg portion 2a has three to five stages and the leg portions 2b and 2c have a three-stage configuration. In contrast, there are various configurations such that the leg portion 2a has 5 to 6 stages, and the leg portions 2b and 2c have 4 stages, while the leg portion 2a has 6 to 7 stages.

Further, although the collet 22 is used as the fixing means of the short pipe 21 which constitutes the leg portion 2 in the above-mentioned example, the short pipe is firmly fitted and its expansion and contraction is restricted by mutual frictional force. Alternatively, a screw for fixing may be screwed into the outer short pipe, and its tip may be crimped to the outer peripheral surface of the inner short pipe so that mutual sliding can be regulated. May be. Further, as the form of the short tube 21, a square tube or the like can be used in addition to the cylinder.

Although a tripod for a camera is illustrated in the drawing, it is needless to say that the present invention can be applied to a tripod for a surveying instrument or a telescope.

[0030]

[Effect of device]

 According to the present invention, since the three legs are constructed as a multi-stage telescopic shaft, it is convenient to carry, and when using, the three legs are extended so that the tripod can be properly installed at a desired place. You can

In particular, in the present invention, among the three legs, one leg has a larger number of short tubes than the other legs, and is configured as the longest shaft having the maximum length when extended. The effect is that the platform can be easily leveled on a sloping ground and its height can be easily adjusted. However, on a sloping ground, the legs can be opened wide to improve stability, and even in that state, the platform can be set to a desired and sufficient height.

Further, in the invention of claim 2, since one leg has a four-stage configuration and the other two legs have a three-stage configuration, the whole can be made compact when not in use, and the legs can be sufficiently extended when in use. it can.

[Brief description of drawings]

FIG. 1 is a perspective view showing a tripod for a camera as an example of the present invention.

FIG. 2 is a partial cross-sectional view showing an enlarged part of a leg portion of the tripod.

FIG. 3 is a side view showing a usage state of the tripod.

FIG. 4 is a side view showing a conventional tripod.

FIG. 5 is a side view showing a conventional tripod.

[Explanation of symbols]

 1 Platform 11 Platform 12 Elevator 13 Pedestal 2, 2a, 2b, 2c Leg 21 Short tube 22 Collet 23 Joint 24 Screw

Claims (2)

[Scope of utility model registration request] 1. A tripod having three legs for supporting a platform, each leg being configured as a multi-stage telescopic shaft into which short pipes are sequentially fitted, one of the legs being one of the legs. A tripod leg structure characterized in that it has a number of shorter tubes than the other two legs and is configured as the longest axis that maximizes the length when extended. 2. One of the three legs is a four-stage telescopic shaft composed of four short tubes, and the other two legs are three-stage telescopic shafts composed of three short tubes. The tripod leg structure described.