JP6838948B2 - Telescopic device - Google Patents

Description

The present invention relates to a technique for a telescopic device that can be expanded and contracted.

There is a telescopic device as a mechanism for adjusting the height or length of an object.

The telescopic device has various uses such as a device for supporting a camera device (monopod, tripod, etc.), a leg part of furniture such as a chair / table, a handle part of a cane / umbrella, and so on. There are issues to be solved.

Therefore, research and development on the telescopic device have been actively carried out. For example, Patent Document 1 proposes a telescopic device capable of preventing rattling of the lower tubular body at the time of fixing by the fixing means.

Japanese Patent No. 5825731

However, in the above-mentioned conventional technique, there is a problem that the device configuration of the telescopic device is complicated and the number of parts is increased.

Further, in the above-mentioned conventional technique, there is a problem that a protrusion is always present on the side portion of the telescopic device, which spoils the aesthetic appearance of the device and interferes with operation and use.
Further, in the above-mentioned conventional technique, since the operation system of the expansion / contraction device is distributed, there is a problem that the operation of extending / contracting the expansion / contraction device becomes complicated.

Therefore, in view of the above problems, it is an object of the present invention to provide a telescopic device capable of simplifying the device configuration, smartening the shape, and easily performing the telescopic operation.

One form of the telescopic device disclosed is a guide member having a tubular shape, and a first portion and a second portion that are connected to each other and move in synchronization with each other in the direction connecting both ends of the tubular shape. A telescopic device having a shaft member and a spiral groove in which the guide member is arranged inside the tubular shape and in a direction connecting both ends of the tubular shape, and inside the tubular shape. The first portion is a protrusion that fits into the linear groove, and has a linear groove arranged in a direction connecting both ends of the tubular shape. The first portion has a first protrusion that regulates rotation of the tubular shape in the circumferential direction, and the second portion has a second protrusion that is a protrusion that fits into the spiral groove. By moving the second protrusion along the spiral groove, the second portion is rotated in the circumferential direction of the tubular shape, and the first portion is rotated in the circumferential direction of the tubular shape. by regulating that, have a rotation restricting means to prevent further movement of the second portion along the groove of the spiral-shaped, and the grooves of the groove and the linear shape of the spiral shape, as lead are arranged to intersect, characterized in Rukoto to.

The disclosed telescopic device can be simplified in device configuration, smart in shape, and can be easily expanded and contracted.

It is a figure which shows the whole of the expansion / contraction apparatus which concerns on this embodiment. It is a figure which shows the guide member which concerns on this embodiment. It is a figure which shows the internal structure of the guide member which concerns on this embodiment. It is a figure which shows the shaft member which concerns on this embodiment. It is a perspective view which shows the connecting part (rotation regulation means) of the 1st part and 2nd part which concerns on this Embodiment. It is a top view which shows the connecting part (rotation regulation means) of the 1st part and 2nd part which concerns on this Embodiment. It is a figure explaining the operation of the shaft member (the 1st part and the 2nd part) which concerns on this embodiment.

A mode for carrying out the present invention will be described with reference to the drawings.
(Structure of telescopic device according to this embodiment)

The structure of the expansion / contraction device 1 according to the present embodiment will be described with reference to FIGS. 1 to 7. FIG. 1 is a diagram showing an overall image of the telescopic device 1. As shown in FIG. 1, the expansion / contraction device 1 has a guide member 2 and a shaft member 12, and the shaft member 12 has a first portion 14, a second portion 22, and a switch means 28.

FIG. 2 is a view showing the appearance of the guide member 2, and FIG. 3 is a view showing the cross-sectional shape of the guide member 2 (in (a) and (b), the cut end is changed). As shown in FIG. 2, the guide member 2 is a member having a cylindrical shape. As shown in FIGS. 3A and 3B, the guide member 2 has a spiral groove 4 and a linear groove 6 inside. The grooves 4 and 6 are arranged in the direction 8 connecting both ends of the tubular shape formed by the guide member 2. Further, the grooves 4 and 6 are preferably arranged from one end to the other end of the tubular shape formed by the guide member 2. Since the range of motion of the shaft member 12 described later depends on the installation length of the grooves 4 and 6, when the grooves 4 and 6 are arranged from one end to the other end of the tubular shape formed by the guide member 2, the shaft member 12 The range of motion increases.

The linear groove 6 is preferably composed of two grooves arranged at opposite positions inside the tubular shape formed by the guide member 2. This is because the ability of the guide member 2 to regulate the rotational movement of the tubular shape in the circumferential direction 10 of the first portion 14, which will be described later, can be enhanced. However, the linear groove 6 may be formed of, for example, two sets of two grooves (four grooves) arranged at opposite positions, and the arrangement and number of the grooves 6 are particularly limited. It is not something that is done.

FIG. 4 is a schematic view for explaining the configuration of the shaft member 12, and FIGS. 5 and 6 are perspective views for explaining the mode of the connecting portion of the first portion 14 and the second portion 22 included in the shaft member 12.・ It is a plan view. In FIG. 4, for convenience, the gear 20 included in the first portion 14 and the gear 26 included in the second portion 22, which will be described later, are not shown.

The shaft member 12 is a member that moves in the tubular shape formed by the guide member 2 in the direction 8 connecting both ends of the tubular shape. As shown in FIG. 4, the shaft member 12 has a first part 14 and a second part 22, and the first part 14 and the second part 22 are connected and move in synchronization with each other along the direction 8. To do. The movement of the first part 14 and the second part 22 in synchronization means that when one of them moves, the other also moves in the same direction as the other by the same distance, and conversely, the movement of either one. When is regulated, the other is regulated as well as the other.

As shown in FIG. 4, the first portion 14 has a first protrusion 16 which is a protrusion that fits into the linear groove 6 on the side portion, and the first protrusion 16 is the circumference of the first portion 14. The rotational movement in the direction 10 is regulated. The first protrusion 16 has, for example, a linear shape (square shape). It is preferable that the first protrusions 16 are provided in the same number as the linear grooves 6. This is because the ability to regulate the rotational movement of the first portion 14 in the circumferential direction 10 can be enhanced. Since the first portion 14 has the first protrusion 16, it can move only in the direction 8.

As shown in FIG. 4, the second portion 22 has a second protrusion 24 on the side, which is a protrusion that fits into the spiral groove 4. The second protrusion 24 has, for example, a spiral shape. By moving the second protrusion 24 along the spiral groove 4, the second portion 22 can be rotated in the circumferential direction 10 and the second portion 22 can be moved in the direction 8. If the second part 22 cannot be rotated in the circumferential direction 10, the second part 22 cannot move along the direction 8.

The first portion 14 has a rotation regulating means 18, and the rotation regulating means 18 restricts the second portion 22 from rotating in the circumferential direction 10 so that the second portion 22 moves along the direction 8. Make it impossible. The rotation regulating means 18 regulates the rotation of the second portion 22 in the circumferential direction 10 by synchronizing the movement of the second portion 22 in the circumferential direction 10 with the movement of the first portion 14 in the circumferential direction 10. To do. In the rotation regulating means 18, the mechanism provided by the first part 14 acts on the mechanism provided by the second part 22, so that the movement of the second part 22 in the circumferential direction 10 is caused by the movement of the first part 14 in the circumferential direction 10. Synchronize with the movement. Therefore, the second portion 22 needs to be provided with a mechanism for receiving the action by the rotation regulating means 18.

As shown in FIGS. 5 and 6, when the second portion 22 has the gear-shaped unevenness 26 at the connecting portion with the first portion 14, the rotation regulating means 18 has the first portion 14 on the gear-shaped unevenness 26. The gear-shaped unevenness 20 is fitted. By doing so, the rotation regulating means 18 synchronizes the movement of the second portion 22 in the circumferential direction 10 with the movement of the first portion 14 in the same direction 10. Since the movement of the first portion 14 in the circumferential direction 10 is regulated by the action of the first protrusion 16, the movement of the second portion 22 in the circumferential direction 10 is also regulated by the function of the rotation regulating means 18. To.

The rotation regulating means 18 is a form achieved by a mechanical mechanism as long as it is a means for synchronizing the movement of the second part 22 in the circumferential direction 10 with the movement of the first part 14 in the same direction 10. It may be a form achieved by an electric mechanism such as an electromagnet. That is, the rotation regulating means 18 may have any form (mechanism) as long as it is a means for synchronizing the movement of the second portion 22 in the circumferential direction 10 with the movement of the first portion 14 in the same direction 10. good.

Further, the shaft member 12 has a switch means 28, and the switch means 28 has "a regulated state in which the rotation regulating means 18 regulates the operation of the second portion 22" and "an operation of the second portion 22 by the rotation regulating means 18." Switch to "unregulated state" where the regulation has been lifted. That is, when the operation restriction of the second part 22 is released by the switch means 28, the shaft member 12 (first part 14, second part 22) can move along the direction 8.
FIG. 7 is a diagram illustrating the operation of the shaft member 12 (first portion 14 and second portion 22), but in FIG. 7, the gear 20 and the gear 26 are omitted for convenience.

As shown in FIG. 7B, in the present embodiment, when the first portion 14 is pulled away from the second portion 22, the guide member 2 (spiral groove 4) and the second protrusion 24 Due to the frictional force generated between the two, the gear-shaped irregularities 20 and 26 are separated from each other. That is, since the operation regulation by the rotation regulating means 18 is released from the second part 22, the shaft member 12 (first part 14, second part 22) guides in the direction in which the first part 14 is pulled. Move in the member 2.

On the other hand, as shown in FIG. 7A, when the first portion 14 is pushed toward the second portion 22, the gear-shaped irregularities 20 and 26 are in a fitted state. That is, the second portion 22 is in a state in which the movement regulation by the rotation regulating means 18 is effective and cannot move in the direction 8, so that the shaft member 12 (first portion 14, second portion 22) is the first portion. It is not possible to move in the guide member 2 from 14 toward the second portion 22.

Therefore, as shown in FIG. 7B, when the first portion 14 (gear-shaped irregularities 20 and 26) is separated from the second portion 22 by the switch means 28, the second portion 22 operates by the rotation regulating means 18. The regulation is released, and the guide member 2 can move while rotating in the circumferential direction 10. That is, when the operation restriction of the second part 22 is released by the switch means 28 and the first part 14 is pushed toward the second part 22, the shaft member 12 (first part 14, second part 22) becomes the second part. 1 Moves in the guide member 2 toward the direction in which the site 14 is pushed. Even when the operation restriction of the second part 22 is released by the switch means 28 and the first part 14 is pulled away from the second part 22, the shaft member 12 (first part 14, second part 22) remains. It moves in the guide member 2 in the direction of pulling the first portion 14.

As described above, the expansion / contraction device 1 is composed of the guide member 2 and the shaft member 12, the number of parts is small, and the device configuration can be simplified. Further, the telescopic device 1 has a structure for realizing expansion and contraction of the device arranged inside the guide member 2, and since unevenness does not appear on the outside, it does not spoil the appearance and is an obstacle during use and operation. Absent. Further, in the expansion / contraction device 1, since the operation system for selecting ON / OFF of the expansion / contraction operation is integrated in the switch means 28, the expansion / contraction operation can be easily performed.
(How to use the telescopic device according to this embodiment)

A method of using the telescopic device 1 will be described with reference to FIG. 7 and the like. The operator releases the movement restriction of the second part 22 in the circumferential direction 10 by the rotation regulating means 18, synchronizes the movements of the first part 14 and the second part 22 toward the direction 8, and causes the shaft member 12 to move. Move along direction 8. The operator can extend the telescopic device 1 by moving it in the direction of pulling out the shaft member 12 from the guide member 2, and contract the telescopic device 1 by moving it in the direction of pushing the shaft member 12 into the guide member 2. .. By doing so, the operator can cause the expansion / contraction device 1 to perform the expansion / contraction operation.

As shown in FIG. 7B, in the present embodiment, the operator pulls the first portion 14 in the direction away from the second portion 22, and guide member 2 (spiral groove 4) and the second protrusion 24. Due to the frictional force generated between them, the gear-shaped irregularities 20 and 26 are separated from each other. That is, the operator moves the shaft member 12 (first part 14, second part 22) in the guide member 2 in the direction in which the first part 14 is pulled, assuming that the operation regulation by the rotation regulating means 18 is released. Let me.

Further, the operator releases the operation restriction of the second part 22 by the rotation regulating means 18 by pulling the first part 14 (gear-shaped unevennesses 20 and 26) from the second part 22 by the switch means 28, and guides the user. The shaft member 12 can be moved in the member 2. That is, the operator lifts the operation restriction of the second part 22 by the switch means 28, pushes the first part 14 toward the second part 22, and pushes the first part 14 in the guide member 2. The shaft member 12 (first part 14, second part 22) is moved toward the direction.

After releasing the operation restriction of the second part 22 by the switch means 28, the operator pulls the first part 14 in the direction away from the second part 22, and in the guide member 2, the shaft member 12 in that direction. (1st part 14, 2nd part 22) may be moved.

The operator restricts the movement of the second portion 22 in the circumferential direction 10 by the rotation regulating means 18 so that the first portion 14 and the second portion 22 cannot move in the direction 8. By doing so, the operator can fix the length of the expansion / contraction device 1 without performing the expansion / contraction operation on the expansion / contraction device 1.

As shown in FIG. 7A, in the present embodiment, the operator pushes the first portion 14 toward the second portion 22, and fits the gear-shaped irregularities 20 and 26. By doing so, the operator puts the operation regulation into the second part 22 by the rotation regulating means 18, and the shaft member 12 (first part 14, second part 22) in the guide member 2 is first. The movement from the part 14 to the second part 22 is prevented. By doing so, the operator can fix the length of the expansion / contraction device 1 without performing the expansion / contraction operation on the expansion / contraction device 1.

As described above, the expansion / contraction device 1 is composed of the guide member 2 and the shaft member 12, the number of parts is small, and the device configuration can be simplified. Further, since the expansion / contraction device 1 has a configuration for realizing expansion / contraction of the device inside the guide member 2 so that unevenness does not appear on the outside of the device, the appearance of the device is not spoiled and the appearance of the device is not spoiled. Nothing that gets in the way during operation is placed on the outer part. Further, the expansion / contraction device 1 has a configuration in which the expansion / contraction operation can be easily performed because the operation system for selecting ON / OFF of the expansion / contraction operation is integrated in the switch means 28.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications are made within the scope of the gist of the present invention described in the claims.・ Can be changed.

1 Telescopic device 2 Guide member 4 Spiral groove 6 Linear groove 8 Direction connecting both ends of the cylinder 10 Circumferential direction of the cylinder 12 Shaft member 14 First part 16 First protrusion 18 Rotation regulating means 20 Gear 22 included in one part 22 Second part 24 Second protrusion 26 Gear 28 provided in the second part 28 Switch means

Claims (7)

A tubular guide member and
A telescopic device having a shaft member that is connected to each other and has a first portion and a second portion that move in synchronization with each other in the guide member in a direction connecting both ends of the tubular shape.
The guide member is arranged inside the tubular shape and in a direction connecting both ends of the tubular shape, and in a direction connecting the inside of the tubular shape and both ends of the tubular shape. With a linear groove to be arranged,
The first portion is a protrusion that fits into the linear groove, and has a first protrusion that restricts the first portion from rotating in the circumferential direction of the tubular shape in the guide member.
The second portion has a second protrusion that is a protrusion that fits into the spiral groove, and by moving the second protrusion along the spiral groove, the circumferential direction of the tubular shape is obtained. Rotate to
A rotation regulating means for preventing the second portion from moving along the spiral groove by restricting the first portion from rotating the second portion in the circumferential direction of the tubular shape. have a,
Telescopic device comprising a groove and the groove of the linear shape of the spiral-shaped, are arranged to cross to be connected, characterized in Rukoto. The rotation regulating means synchronizes the movement of the second part in the circumferential direction with the movement of the first part in the circumferential direction based on a mechanical mechanism, so that the second part becomes the circle. The telescopic device according to claim 1, wherein the rotation in the circumferential direction is restricted. The claim is characterized in that the rotation regulating means regulates the rotation of the second portion in the circumferential direction by engaging the gear included in the first portion and the gear included in the second portion. 2. The telescopic device according to 2. When the operation of pulling the first portion away from the second portion is performed, the gears provided by the first portion and the second portion are separated from each other, so that the restricted state by the rotation regulating means is released and the first portion is released. When the operation of pushing toward the second portion is performed, the rotation of the second portion in the circumferential direction is restricted by the meshing of the gears provided by the first portion and the second portion. The telescopic device according to claim 3. The rotation regulating means synchronizes the movement of the second part in the circumferential direction with the movement of the first part in the circumferential direction based on an electric mechanism including an electromagnet, thereby causing the second part. The telescopic device according to claim 1, wherein the device is restricted from rotating in the circumferential direction. The telescopic device according to any one of claims 1 to 5, wherein the shaft member has a switch means for switching a regulated state by the rotation regulating means to a non-regulated state. The telescopic device according to any one of claims 1 to 6, wherein the linear groove is composed of two grooves arranged at opposite positions.

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