TWM576558U - Lifting seat tube with adjustable ascending stroke - Google Patents

Abstract

The present invention relates to a lifting seat tube comprising an outer tube, an inner tube and a limiting bushing. The inner tube is disposed on the outer tube in an up-and-down displacement manner and has a convex portion. The limiting bushing is disposed on the top end of the outer tube and is pierced by the inner tube in a manner of rotating in situ, and the limiting bushing is further provided. The utility model has a limiting portion, the limiting portion is located above the convex portion of the inner tube, and the top and bottom ends of the limiting portion have a height difference along the axial direction of the inner tube, so that by rotating the limiting bushing, The height difference of the limiting bushing is designed to match the convex portion of the inner tube. Once the limiting portion of the limiting bushing abuts against the convex portion of the inner tube, the inner tube cannot rise and achieve the effect of adjusting the stroke.

Description

Lifting seat tube with adjustable lifting stroke

This creation is related to the lifting seat tube, in particular to a lifting seat tube that can adjust the ascending stroke.

The height of the bicycle's seat cushion will affect the comfort and safety during riding. Therefore, the structure is equipped with an adjustable seat that can adjust the height of the seat cushion according to the rider's body shape, the rider's habit and the riding environment. The tube allows the rider to ride in the correct position for improved ride comfort and safety.

However, although the adjustable seat tube can reduce the height of the inner tube to save the storage space, after the inner tube height is lowered, it needs to be re-adjusted in the next use, and it takes time to find another suitable one. The height of the seat cushion, which will cause inconvenience and trouble to the rider.

The main purpose of this creation is to provide a lifting seat tube that allows the rider to quickly adjust to the height that suits his or her next use after the height is lowered.

In order to achieve the above main purpose, the lift base pipe of the present invention comprises an outer pipe, an inner pipe, and a limit bushing. The inner tube is partially permeable to the outer tube, and the top end of the inner tube is located outside the outer tube and is used for mounting a pad. The bottom end of the inner tube is located in the outer tube and has a a convex portion of the outer peripheral surface; the limiting bushing is rotatably disposed at a top end of the outer tube and is pierced by the inner tube; further, the limiting bushing has a limiting portion, wherein the limiting portion is located therein Above the convex portion of the tube, the top and bottom ends of the limiting portion have a height difference along the axial direction of the inner tube.

It can be seen from the above that after the inner tube rises to a desired height, the limiting bushing is rotated against the convex portion of the inner tube by the rotation of the limiting bushing to complete the inner tube height. Adjustment, so that the inner tube can be quickly adjusted to the position when it is reused again after storage, and no need for repeated adjustment, thereby saving operation time and increasing convenience of use.

Preferably, the limiting bushing has a sleeve, a ring and a bundle ring, and the sleeve is located in the outer tube and has the limiting portion, the collar abuts against the top end of the outer tube and is connected The sleeve is sleeved between a top end of the outer tube and a bottom end of the collar. Thereby, the collar can be rotated when the loop is released, and the sleeve is rotated together with the sleeve to make the limiting portion abut against the convex portion.

Preferably, the limiting portion may be a plurality of limiting grooves arranged in a stepped manner along the axial direction of the inner tube or a inclined surface extending straight or arc along the axial direction of the inner tube.

The detailed construction, features, assembly or use of the lifting seat tube provided by this creation will be described in the detailed description of the subsequent embodiments. However, those of ordinary skill in the art should understand that the detailed description and specific embodiments of the present invention are merely used to illustrate the present invention and are not intended to limit the scope of the patent application.

The applicant first explains here, in the entire specification, including the examples described below and the claims of the patent application, "upper", "lower", "top", "bottom", "inside", "outside" The terms related to directionality are based on the direction in the schema. In the following embodiments, the same reference numerals will be given to the same or similar elements or structural features thereof.

Referring to Fig. 1, the lifting seat tube 10 of the first embodiment of the present invention comprises an outer tube 20, an inner tube 30, and a limiting bushing 40.

The inner tube 30 is disposed through the outer tube 20 and is vertically displaced relative to the outer tube 20 by a set of pneumatic cylinders 50 (shown in FIG. 4). How to control the inner tube 30 to rise and lower by using the pneumatic cylinder 50 is a conventional technique. In order to save space, I will not repeat them here. The top end of the inner tube 30 is located outside the outer tube 20 and is mainly used for mounting a seat cushion (not shown). The bottom end of the inner tube 30 is located in the outer tube 20 and has three convex portions 32 (actually only at least one is The convex portions 32 are provided on the outer circumferential surface of the inner tube 30 and are arranged at equal intervals with respect to the axial center of the inner tube 30. Further, the convex portion 32 is elongated in the present embodiment, and the extending direction of the convex portion 32 Parallel to the axial direction of the inner tube 30.

The limit bushing 40 is bored by the inner tube 30 and has a sleeve 41, a collar 44 and a bundle ring 46, as shown in Figures 2 and 3:

The sleeve 41 is located in the outer tube 20 and has three limiting portions. The top and bottom ends of each limiting portion have a height difference along the axial direction of the inner tube 30. In this embodiment, each of the limiting portions The plurality of limiting portions 42 are arranged in a stepped manner along the axial direction of the inner tube 30, and each of the limiting portions is disposed above the convex portion 32 of the inner tube 30 in a one-to-one manner. Further, the outer peripheral surface of the tip end of the sleeve 41 has three engaging portions 43, and the engaging portions 43 are arranged at equal intervals with respect to the center of the sleeve 41.

The collar 44 abuts against the top end of the outer tube 20, and the inner peripheral surface of the bottom end of the collar 44 has three engaging grooves 45, and the engaging grooves 45 of the collar 44 are engaged with the sleeve 41 in a one-to-one manner. The engaging portion 43 enables the two to operate in synchronization.

The collar 46 sleeves the top end of the outer tube 20 with the bottom end of the collar 44. When the collar 46 is released, the collar 44 can be rotated, and the sleeve 44 re-drives the sleeve 41 to rotate together.

As can be seen from the above, when the rider wants to adjust the height of the seat cushion, first open the air cylinder 50 to drive the inner tube 30 to a desired height, then close the air cylinder 50 to position the inner tube 30, and then release the collar 46. Then, by rotating the collar 44 to rotate the sleeve 41 together, one of the limiting slots 42 of the sleeve 41 is embedded in the convex portion 32 of the inner tube 30. For example, in FIG. 4, the sleeve 41 is used most. The upper limit groove 42 is embedded in the convex portion 32 of the inner tube 30. As shown in FIG. 5, the sleeve 41 is embedded with the convex portion 32 of the inner tube 30 by the lowermost limit groove 42, and finally confirmed. The adjustment is completed after the height of the inner tube 30 is no problem and the bundle ring 46 is re-tensioned.

After the end of the ride, the rider can use the pneumatic cylinder 50 to minimize the height of the inner tube 30 for storage (as shown in Fig. 3), because the limit bushing 40 has already met the needs of the rider. While being adjusted to the positioning, the fitting between the convex portion 32 of the inner tube 30 and the limiting groove 42 of the limiting bush 40 is utilized in the next use, and the rising height of the inner tube 30 is restricted to the same rider. There is no need to re-adjust the height of the seat cushion, which saves operating time and increases ease of use.

On the other hand, the structure of the limiting portion and the convex portion may be differently changed. In the second embodiment of the present invention, the limiting portion is a slope 52 extending along the axial direction of the inner tube 30 (as shown in FIG. 6). The inclined surface may extend straight or arcuately and is not limited. The convex portion 54 may be a cylinder (as shown in FIG. 6), a sphere (not shown) or a square key (not shown). By the cooperation between the two, the rising height of the inner tube 30 can also be restricted to achieve the effect of adjusting the stroke.

10‧‧‧ Lifting seat tube

20‧‧‧External management

30‧‧‧Inside

32‧‧‧ convex

40‧‧‧ Limit bushing

41‧‧‧Sleeve

42‧‧‧Limited

43‧‧‧Care Department

44‧‧‧ collar

45‧‧‧ snap groove

46‧‧‧Bundle

50‧‧‧ pneumatic cylinder

52‧‧‧Slope

54‧‧‧ convex

Fig. 1 is a perspective view showing the appearance of a lift base pipe according to a first embodiment of the present invention. Fig. 2 is a partially exploded perspective view showing the lift base pipe of the first embodiment of the present invention. Figure 3 is a partial cross-sectional view of the lifter tube of the first embodiment of the present invention, mainly showing the inner tube at the lowest position. The fourth figure is similar to the third figure, mainly showing that the convex portion of the inner tube is embedded in the uppermost limit groove. Figure 5 is similar to Figure 4, which mainly shows that the convex portion of the inner tube is embedded in the lowermost limit groove. Fig. 6 is a partially enlarged view of the lift base pipe of the second embodiment of the present invention.

Claims (6)

A lifting seat tube includes: an outer tube; an inner tube that is vertically movably disposed on the outer tube, the top end of the inner tube being located outside the outer tube, the bottom end of the inner tube being located in the outer tube, and a peripheral portion of the inner tube has a convex portion; and a limiting bushing rotatably disposed at a top end of the outer tube and pierced by the inner tube, the limiting bushing has a limiting portion The limiting portion is located above the convex portion of the inner tube, and the top and bottom ends of the limiting portion have a height difference along the axial direction of the inner tube, and the limiting bushing abuts the limiting portion The convex portion of the inner tube. The lifting seat tube of claim 1, wherein the limiting bushing has a sleeve, a ring and a bundle ring, the sleeve is located in the outer tube and has the limiting portion, the collar abuts At the top end of the outer tube and connecting the sleeve, the bundle ring is sleeved between the top end of the outer tube and the bottom end of the sleeve. The lifting seat tube of claim 2, wherein the outer peripheral mask of the sleeve has a latching portion, and the inner peripheral mask of the sleeve has an engaging groove, and the engaging portion of the sleeve is embedded in the collar The snap groove. The lifting seat tube according to any one of claims 1 to 3, wherein the limiting portion is a plurality of limiting grooves arranged in a stepped manner along an axial direction of the inner tube. The lifting seat tube of any one of claims 1 to 3, wherein the limiting portion is a slope extending along an axial direction of the inner tube. The lifting seat tube according to claim 1, wherein the convex portion has an elongated shape, and the convex portion extends in a direction parallel to an axial direction of the inner tube.