JP2019042363A - Stretchable rod member structure - Google Patents

Abstract

A telescopic rod member structure is provided. A telescopic rod member structure according to the present invention includes a first tube and a second tube connected to the first tube. The first tube has a passage in the axial direction. The second tube is movably fitted into the passage of the first tube. The roller is rotatably disposed between the first tube and the second tube. The roller is brought into contact with the inside of the passage or the outside of the second tube. The second tube moves relative to the first tube, and the roller provides rolling friction to the first tube or the second tube. As a result, the present invention can be operated with less labor and has the effect of making the up-and-down movement more stable. It also has the effect of reducing wear of each member. [Selection] Figure 1

Description

The present invention relates to the field of rod members, and more particularly, to a telescopic rod member structure applied to a desk, chair or other similar device having a lifting (stretching) function.

A typical desk, a writing desk or a personal computer desk has a predetermined height. The user sits in a chair and performs reading, writing, operation of a personal computer, and the like. However, if the user is sitting in a chair for a long time, muscles and bones can not be extended, so they are easily fatigued. At present, there is an elevator whose height of the table surface can be adjusted, and mainly the leg of a liftable desk is configured in such a manner that an inner pipe is inserted into and connected to an outer pipe. The user can adjust the height of the table surface by adjusting the relative positional relationship between the two pipes by himself. In addition, the chair adopts the same structure and is equipped with the height adjustment function.

In addition, hubs are respectively joined to the ends of the outer pipe and the inner pipe in order to reduce the frictional action between the outer pipe and the inner pipe to be connected. The hub located on the outer pipe contacts the outside of the inner pipe. The hub located on the inner pipe contacts the inner surface of the outer pipe. Since the material of the hub is different from the material of the inner pipe and the outer pipe, wear and tear on the surfaces of the inner pipe and the outer pipe is reduced.

However, when the inner pipe moves relative to the outer pipe and the hub receives sliding friction, the hub is easily worn away. The abraded hub does not stably contact the outer pipe and the inner pipe, and the inner pipe swings relative to the outer pipe.

Furthermore, as another solution, a rib is provided on the inner surface of the outer pipe or the outer side of the inner pipe. As a result, the rib of the pipe comes in contact with the surface of the other pipe, and the contact surface is small, so the frictional force is reduced. However, the seed structure is for sliding friction and there is a clear wear between the parts.

Then, the present inventor considered that the above-mentioned fault could be improved, and as a result of earnestly examining, it came to the proposal of the present invention which effectively ameliorates the above-mentioned subject by rational design.

In the present invention, the rod member is composed of at least two tubes. As the tubes move relative to one another, the contact between the two tubes becomes rolling friction. This overcomes the disadvantage that sliding friction occurs due to the contact between the two prior art tubes relative to one another.

The present invention has been made to solve the problems of the prior art described above. That is, an object of the present invention is to provide a telescopic rod member structure which can be operated with less labor and has an effect of more stably moving up and down.

Another object of the present invention is to provide a telescopic rod member structure having an effect of reducing wear of each member.

In order to achieve the above object, the feature of the telescopic rod member structure according to the present invention comprises a first tube and a second tube connected to the first tube. A passage is provided in the axial direction of the first tube. The second tube is movably fitted within the passage of the first tube. A roller is rotatably disposed between the first tube and the second tube. The roller is at least in contact with the inside of the passage or the outside of the second tube, the second tube is moved relative to the first tube, and the roller is in the first tube or the second tube. Provide rolling friction against.

It is the schematic which shows the expansion-contraction rod member structure which concerns on 1st Embodiment of this invention. It is a schematic diagram showing height adjustment in a 1st embodiment of the present invention. It is the schematic which shows the expansion-contraction rod member structure which concerns on 2nd Embodiment of this invention. It is the schematic which shows the height adjustment in 2nd Embodiment of this invention. It is an external appearance perspective view which shows the expansion-contraction rod member structure which concerns on 3rd Embodiment of this invention. It is the schematic which shows the expansion-contraction rod member structure which concerns on 3rd Embodiment of this invention. It is an external appearance perspective view which shows the expansion-contraction rod member structure which concerns on 4th Embodiment of this invention. It is the schematic which shows the expansion-contraction rod member structure which concerns on 4th Embodiment of this invention. It is an appearance perspective view showing a hub and an adjustment member of the present invention. It is an external appearance perspective view which shows the other adjustment member of this invention. It is the schematic which shows the expansion-contraction rod member structure which concerns on 5th Embodiment of this invention. FIG. 6 is an external perspective view of the hub of the present invention fitted to another form roller.

Hereinafter, an embodiment of a telescopic rod member structure according to the present invention will be described with reference to the drawings. The embodiments described below do not limit the contents of the present invention described in the claims. Moreover, not all of the configurations described below are necessarily essential requirements of the present invention.

Embodiment

First Embodiment
First, as shown in FIGS. 1 and 2, the telescopic rod member structure of the present invention is used for supporting the work space 10 and adjusting the height of the work space 10. The number of rod members disposed on the bottom of the work space 10 is one or more. One end of the second tube 30 is connected to the work space 10. The work space 10 is a table surface, a seating surface of a chair, or another device or member that needs to be adjusted in height.

The rod member comprises at least a first tube 20 and a second tube 30. A passage 22 is provided in the axial direction of the first tube 20. The second tube 30 is movably fitted in the passage 22 of the first tube 20. At least one roller 40 is rotatably disposed on the first tube 20. One side of the roller 40 is used to contact the outer side 32 of the second tube 30.

Both the first tube 20 and the second tube 30 are square tubes. In the present embodiment, the four rollers 40 are respectively installed or positioned on each side of the first tube 20, and all the rollers 40 are brought into contact with the outer side 32 of each side of the second tube 30. .

The height of the work space 10 is adjusted by raising and lowering the second tube 30 with respect to the first tube 20, and the roller 40 provides a rolling friction action to the second tube 30; Due to the linear movement of the two tubes 30 relative to the first tube 20, low friction resistance is received, and at the same time, wear between the respective members is reduced.

Second Embodiment
As shown in FIGS. 3 and 4, in another embodiment of the present invention, at least one roller 40 is disposed at one end of the second tube 30. The roller 40 is located axially inside the first tube 20 and is in contact with the inside 24 of the first tube 20.

As shown in FIGS. 3 and 4, the first tube 20 and the second tube 30 are square tubes. In the present embodiment, four of the rollers 40 are mounted or positioned on each side of the second tube 30, respectively. All the rollers 40 are in contact with the inside 24 of each side of the first tube 20.

When the second tube 30 moves up and down with respect to the first tube 20, the roller 40 provides rolling friction action to the first tube 20, and the second tube 30 moves to the first tube 20. The linear movement provides low frictional resistance and at the same time reduces wear between the members.

Third Embodiment
As shown in FIGS. 5 and 6, the present embodiment comprises a socket 50 for mounting on the end 26 of the first tube 20. The roller 40 is rotatably mounted inside the socket 50. Thereby, the second tube 30 penetrates the socket 50, and the roller 40 contacts the outer side 32 of the second tube 30. The relative movement of the second tube 30 and the first tube 20 lowers the frictional resistance received and limits the lateral movement (rocking) of the second tube 30. Thereby, the movement of the second tube 30 becomes more stable.

Fourth Embodiment
As shown in FIGS. 7 and 8, the present embodiment includes a hub 60 for mounting on the end 34 of the second tube 30, the roller 40 is rotatably mounted on the hub 60, and The roller 40 contacts the inside 24 of the first tube 20 (see FIG. 8).

The hub 60 shown in FIG. 9 includes an engaging portion 62 connected to the mounting portion 64. The outer diameter of the engagement portion 62 is smaller than the outer diameter of the attachment portion 64. The surface of the hub 60 is provided with a slot 63, and the slot 63 is located between the engagement portion 62 and the attachment portion 64.

The hub 60 has an expansion hole 66. The extension hole 66 is extended from the bottom surface of the attachment portion 64 toward the engagement portion 62. A conical surface 68 is provided inside the expansion hole 66. A plurality of gaps 70 are provided outside the hub 60. A flexible portion 72 is provided between the two adjacent gaps 70. Both ends of the roller 40 are respectively mounted on the two adjacent flexible portions 72.

The embodiment of the present invention further includes the adjusting member 80. The adjusting member 80 has a cone head 82 and a thread portion 84.

The engaging portion 62 of the hub 60 shown in FIG. 8 is used to fit in the axial direction of the second tube 30. The mounting portion 64 and the rollers 40 project out of the end 34 of the second tube 30, and the roller 40 contacts the inside 24 of the first tube 20.

Incidentally, the adjusting member 80 is locked in the expansion hole 66 by the thread portion 84, and the cone head 82 corresponds to the conical surface portion 68. By adjusting the installation position (depth) of the adjusting member 80, the conical surface portion 68 is pushed by the cone head 82 to move the flexible portions 72 outward, and the rollers Achieve the fine adjustment effect of 40 positions. In other words, in the present embodiment, the outer diameter of the hub 60 is expanded outward by adjusting the adjusting member 80, and the roller 40 is more reliably brought into contact with the inner side 24 of the first tube 20. . Further, since the slot 63 is positioned between the engaging portion 62 and the attaching portion 64, the thread portion 84 and the expansion hole 66 are not loosened due to the change of the outer diameter of the attaching portion 64.

With further reference to FIG. 9, the end face of the cone head 82 of the adjustment member 80 has a drive arrangement 86. The drive arrangement 86 is a recessed hole and is used to receive torque. For example, a suitable hand tool may be coupled to the drive arrangement 86 to rotate the adjustment member 80. By the action of the torque, the position of the adjusting member 80 in the expanded hole 66 is adjusted.

There is a bore 88 in the drive arrangement 86, which is used to connect a pneumatic device (not shown). Also, the air pressure device is used to orientate the rod member after height adjustment. When the force of the air pressure device is lost, the rod member automatically returns to the initial position.

Referring to FIG. 10, the drive configuration 86 of the end face of the adjustment member 80 is a convex block, and the drive configuration 86 has the bore 88 for connecting to the air pressure device (shown in FIG. 10). ).

Since the driving structure 86 is a convex block structure, the user or the installation person uses an appropriate tool for the penetration structure provided in advance in the first tube 20 after assembling the rod member or in use. It penetrates and meshes with the drive structure 86. Thus, the adjustment member 80 is driven by applying an appropriate torque from the outside, and the adjustment member 80 achieves the adjustment effect of being positioned inside the expansion hole 66.

The technical means in which the combination of the socket 50 and the roller 40 shown in FIG. 11 is fitted to the first tube 20, and the combination in which the hub 60 is connected to the roller 40 is fitted to the second tube 30 The technical means may be applied to the rod member. Thereby, the stability of the relative movement of the second tube 30 to the first tube 20 is enhanced.

The roller 40 shown in FIG. 9 is a pin roller (needle roller). The roller 40 shown in FIG. 12 is a plate-like contact roller or a ball roller.

The above embodiments are only for explaining the technical concept and features of the present invention, and it is intended to make those skilled in the art understand and implement the contents of the present invention. It does not limit the scope of the claims. Accordingly, improvements or modifications having various similar effects without departing from the spirit of the present invention are intended to be included in the scope of the claims.

DESCRIPTION OF REFERENCE NUMERALS 10 work space 20 first tube 22 passage 24 inner 26 end 30 second tube 32 outer 34 end 40 roller 50 socket 60 hub 62 engagement portion 63 slot 64 attachment portion 66 extended hole 68 conical surface portion 70 gap 72 flexible portion 80 Adjustment Member 82 Cone Head 84 Thread 86 Driving Configuration 88 Bore

Claims (10)

A telescopic rod member structure connected to a work space and for adjusting the position of the work space, wherein
A first tube having a passage in the axial direction;
A second tube movably inserted into the passage of the first tube;
A roller rotatably disposed between the first tube and the second tube;
The roller is at least in contact with the inside of the passage or the outside of the second tube, the second tube is moved relative to the first tube, and the roller is in the first tube or the second tube. A telescopic rod member structure characterized by providing rolling friction.   The apparatus further comprises a socket, wherein the roller is rotatably mounted to the socket, the socket is mounted to an end of the first tube, the second tube penetrates the socket, and the roller is the second The telescopic rod member structure according to claim 1, characterized in that it is in contact with the outside of the tube.   The apparatus further comprises a hub, wherein the roller is rotatably mounted on the hub, the hub is mounted on an end of the second tube, and the roller is in contact with the inside of the first tube. The telescopic rod member structure according to claim 1.   It further comprises an adjustment member, the hub has an expansion hole, and the adjustment member is fitted in the expansion hole, the expansion hole has a conical surface, the adjustment member has a cone head, the cone 4. A head according to claim 3, characterized in that it corresponds to the position of said conical surface and causes the outer diameter of said hub to expand outwards and said roller to contact the inside of said first tube. The telescopic rod member structure according to claim 1.   A plurality of gaps are provided outside the hub, and a flexible portion is formed between two adjacent gaps of the hub, and the adjustment member is locked in a position in the expansion hole and pushes the flexible portion. The telescopic rod member structure according to claim 4, characterized in that it is moved outward to bring the roller into contact with the inside of the first tube.   The end face of the cone head of the adjusting member has a driving structure, and the driving structure is used to receive torque and adjust the adjusting member to correspond to the position of the expansion hole. The telescopic rod member structure according to claim 4.   The telescopic rod member structure according to claim 6, wherein the driving structure is a concave hole or a convex block.   The hub includes an engaging portion and an attaching portion, and an outer diameter of the engaging portion is smaller than an outer diameter of the attaching portion, and the engaging portion is used to be fitted into the second tube in the axial direction. The roller according to claim 3, wherein the roller is mounted on the mounting portion, and the mounting portion protrudes from an end of the second tube, and the roller is in contact with the inside of the first tube. Telescopic rod member structure.   A plurality of gaps are provided on the outside of the mounting portion, and a flexible portion is provided between two adjacent gaps, and both ends of the roller are respectively mounted on the two adjacent flexible portions, the flexible The telescopic rod member structure according to claim 8, characterized in that the roller is brought into contact with the inside of the first tube by moving the part outward.   The telescopic rod member structure according to claim 8, wherein the surface of the hub comprises a slot, and the slot is located between the engaging portion and the attaching portion.