Telescopic rod capable of being operated by one hand

Abstract

The utility model relates to a one-hand operation telescopic rod which comprises a main supporting rod and a telescopic rod body which are arranged side by side and connected into a whole through an upper sliding sleeve and a lower sliding sleeve. The main supporting rod is rotatably sleeved with an adjusting wheel outside the overlapping section of the two rods, a rack meshed with outer teeth of the adjusting wheel is fixed to the side, facing the main supporting rod, of the telescopic rod, and the telescopic rod is driven by the adjusting wheel to act. The outer tooth adjusting wheel is matched with the rack to drive the telescopic rod to stretch out and draw back, the telescopic rod stretches out and draws back in a non-rotating mode, the adjusting wheel is rotated by one hand to replace straight-up and straight-down telescopic motion, and the self-locking positioning function is achieved, so that the telescopic rod is particularly suitable for being used on the telescopic rod with medium and short strokes, and horizontal adjustment of table legs due to ground fall is met.

Description

Technical field:

[0001] The utility model belongs to the technical field of telescopic operation and self-locking of rods, and particularly relates to a telescopic rod operated by one hand. Background technology:

[0002] Existing telescopic poles are mostly used in lightweight support applications to achieve height or leg length balance adjustment. Typical applications are tent support poles and table support legs. The former has a long-stroke adjustment and often uses a sleeve structure, with step-by-step positioning using a spring bead and stepless positioning using a top screw or cam. For example, CN201320582290.6 discloses a telescopic connector and a telescopic connector for a tent, and CN201620386652.8 discloses a telescopic pole locking device and a telescopic pole, leg, and bracket using the device. Both of these public documents feature stepless adjustment and require both hands to operate. After unlocking the top screw or cam, both hands are required to coordinate the extension or compression operation.

[0003] As a table support leg, it only needs to meet the balance adjustment of the length of the legs. Generally, the adjustment stroke is short. For example, CN201320263445.X discloses a table leg with adjustable height and angle, which adopts threaded adjustment and telescopic movement. During adjustment, the two pipes need to rotate relative to each other. Generally, the adjustment foot needs to be lifted off the ground before it can be operated.

[0004] How to provide a solution for single-handed telescopic operation has become the research object of the present invention. Summary of the invention:

[0005] The utility model aims to design a single-handedly operated telescopic rod which is driven by the cooperation of an external-toothed adjusting wheel and a rack.

[0006] The technical solution of the utility model is achieved as follows: a one-handedly operated telescopic rod, characterized in that it includes a main support rod and a telescopic rod, which are arranged side by side and are connected into one body through an upper sliding sleeve and a lower sliding sleeve; the main support rod is rotatably provided with an adjusting wheel outside the overlapping section of the two rods, and the telescopic rod is fixed with a rack meshing with the outer teeth of the adjusting wheel on the side facing the main support rod, and the telescopic rod is driven to move by means of the adjusting wheel.

[0007] One side of the upper sliding sleeve is locked on the upper end of the telescopic rod, and the other side of the sliding sleeve is set on the main support rod; the lower sliding sleeve is riveted to the lower end of the main support rod and half wrapped around the telescopic rod; the lower sliding sleeve also forms an axial positioning for the adjusting wheel.

[0008] The upper sliding sleeve is made of plastic and has a blind hole and a through hole. The blind hole cover is arranged on the upper end of the telescopic rod, and the through hole sleeve is arranged on the main support rod; the lower sliding sleeve is a U-shaped sheet metal part, having a U-shaped bottom and a U-shaped clamping mouth, and the U-shaped clamping mouth is cut with a rectangular notch. With the help of the U-shaped bottom half wrapped around the outside of the telescopic rod, the U-shaped clamping mouth is riveted to the main support rod, and the adjusting wheel is constrained at the rectangular notch.

[0009] The adjusting wheel and the rack are provided with matched helical teeth or helical teeth.

[0010] The regulating wheel has axial grooves distributed on the spiral tooth or helical tooth surface.

[0011] The external toothed adjustment wheel of the utility model cooperates with the rack to drive the extension and retraction. The telescopic rod is a non-rotating extension. The adjustment wheel is rotated with one hand to exchange for a straight up and down telescopic movement. It has a self-locking position and is particularly suitable for use on medium and short stroke telescopic rods, and can meet the needs of, for example, horizontal adjustment of table legs due to ground differences. Description of the drawings:

[0012] The present invention will be further described below with reference to specific figures:

[0013] Figure 1 Schematic diagram of one-handed operation of the telescopic rod

[0014] Figure 2 Schematic diagram of the telescopic rod for one-hand operation

[0015] in

[0016] 1—Main support rod; 2—Telescopic rod;

[0017] 3—upper sliding sleeve; 31—through hole;

[0018] 4—lower sliding sleeve; 41—U-shaped bottom; 42—U-shaped clamping mouth; 43—rectangular notch;

[0019] 5—adjusting wheel; 51—helical teeth; 52—axial groove; 6—rack; Specific implementation method:

[0020] Reference Figure 1 and Figure 2 The telescopic rod is operated with one hand, which includes a main support rod 1 and a telescopic rod 2, which are arranged side by side and are connected into one body through an upper sliding sleeve 3 and a lower sliding sleeve 4; the main support rod 1 is rotatably sleeved with an adjusting wheel 5 outside the overlapping section of the two rods, and the telescopic rod 2 is fixed with a rack 6 meshing with the outer teeth of the adjusting wheel on the side facing the main support rod, and the telescopic rod 2 is driven to move with the help of the adjusting wheel 5; and the adjusting wheel 5 is positioned by the lower sleeve 4 and is only allowed to make rotational movement.

[0021] More specifically, one side of the upper sliding sleeve 3 is locked to the upper end of the telescopic rod 2, and the other side is slidably sleeved on the main support rod 1; the lower sliding sleeve 4 is riveted to the lower end of the main support rod 1 and half-wrapped outside the telescopic rod 2; the telescopic rod 2 is constrained to one side of the main support rod 1 by means of the upper sliding sleeve 3 and the lower sliding sleeve 4 without affecting the axial movement of the telescopic rod.

[0022] Furthermore, the upper sleeve 3 is molded from plastic and has a blind hole and a through hole 31. This blind hole cover is secured to the upper end of the telescopic rod 2, preventing the rod end from being exposed. The through hole 31 is sleeved onto the main support rod 1, allowing the upper sleeve 3 to slide up and down along with the rod, guided by the main support rod 1. The lower sleeve 4 is a U-shaped sheet metal component with a U-shaped base 41 and a U-shaped opening 42. The U-shaped opening 42 is cut with a rectangular notch 43. The U-shaped base 41 partially encloses the telescopic rod 2, while the U-shaped opening 42 is riveted to the main support rod 1, constraining the lower section of the telescopic rod 2. The rectangular notch 43 prevents the adjusting wheel 5 from axial movement.

[0023] In this embodiment, the optimal combination of upper sleeve 3 made of plastic and lower sleeve 4 made of sheet metal maintains a constant meshing clearance between adjusting wheel 5 and rack 6 while ensuring smooth sliding. Alternatively, both sleeves could be made of sheet metal or plastic. Alternatively, upper sleeve 3 could be locked to one side of main support rod 1. In this case, the telescopic rod would need to pass through the upper sleeve, requiring a longer design.

[0024] The adjustment wheel 5 and rack 6 can be mated using a well-established meshing scheme, such as helical teeth 51 or helical teeth. To improve the feel of adjustment, the adjustment wheel 5 has axial grooves 52 distributed on the helical teeth 51 or helical teeth. This increases friction during manual adjustment and facilitates the telescopic rod's extension and retraction.

Claims

1. A telescopic rod for single-hand operation, characterized by: It includes a main support rod and a telescopic rod, which are arranged side by side and connected into one body through an upper sliding sleeve and a lower sliding sleeve; the main support rod is rotatably provided with an adjusting wheel outside the overlapping section of the two rods, and the telescopic rod is fixed with a rack meshing with the outer teeth of the adjusting wheel on the side facing the main support rod, and the telescopic rod is driven to move by means of the adjusting wheel.

2. The one-handed telescopic rod according to claim 1, characterized in that: One side of the upper sliding sleeve is locked on the upper end of the telescopic rod, and the other side of the sliding sleeve is arranged on the main support rod; the lower sliding sleeve is riveted to the lower end of the main support rod and half wrapped around the telescopic rod; the lower sliding sleeve also forms an axial positioning for the adjusting wheel.

3. The one-handed telescopic rod according to claim 2, characterized in that: The upper sliding sleeve is made of plastic and has a blind hole and a through hole. The blind hole cover is arranged on the upper end of the telescopic rod, and the through hole sleeve is arranged on the main support rod; the lower sliding sleeve is a U-shaped sheet metal part with a U-shaped bottom and a U-shaped clamp, and the U-shaped clamp is cut with a rectangular notch. With the help of the U-shaped bottom half wrapped around the outside of the telescopic rod, the U-shaped clamp is riveted to the main support rod, and the adjusting wheel is constrained at the rectangular notch.

4. A one-handed telescopic rod according to claim 1, 2 or 3, characterized in that: The adjusting wheel and the rack are provided with matching helical teeth, or bevel teeth.

5. The one-handed telescopic rod according to claim 4, characterized in that: The regulating wheel has axial grooves distributed on the spiral tooth or bevel tooth surface.

Images