CN2519040Y - Non-round rods with adjustable length - Google Patents

Abstract

A non-circular rod-shaped object with adjustable length is composed of an external tube with non-circular cross-section and at least one side hole, a slide tube with a lower part on its internal surface, a spring in said slide tube, an internal rod with cross-section matched with said external tube and with one end pivoted to said external tube and another end able to be extended or retracted but not twisted, and the multiple push-pull units with the same number as the side holes on said external tube. When the sliding cylinder is pushed to a stop point by the spring, the pushing part can force the pushing part inwards to enable the pushing part to push the inner rod tightly, and when the sliding cylinder moves to the direction of the spring, the pushing part can not push the inner rod tightly, so that the inner rod and the outer tube can slide relatively.

Description

Non-round rods with adjustable length

technical field

The utility model relates to a rod-shaped object, and furthermore, relates to a non-circular rod-shaped object whose length can be adjusted.

Background technique

In daily life, rods with adjustable length are often seen, such as handles of garden shears, mops, and rakes, or brackets of pogo sticks, scooters, and foldable bicycles. With the adjustable length rod, it can be adjusted to the most suitable length according to the usage conditions (such as the handle of garden shears), or it can be condensed into a shorter and smaller storage volume when not in use ( Such as the bracket of the bouncing pole), very convenient.

Utility model content

The main purpose of the present utility model is to provide a non-circular rod-shaped object with adjustable length, the length of which can be easily and quickly changed according to requirements.

In order to achieve the purpose of exposing, the non-circular rod with adjustable length provided by the utility model includes: an outer tube with a non-circular cross-section, and at least one side hole penetrating through the tube wall near one end; A cylinder whose cross-section fits the outer tube is sheathed on the end of the outer tube provided with the side hole, and can slide axially between a first position and a second position; the inner wall of the sliding tube corresponds to each One side of the side hole has a pressing portion, and the end of the pressing portion corresponding to the second position is more protruding from the center of the sliding cylinder than the end corresponding to the first position; a spring is sleeved on the outer tube And located inside the slider, one end corresponding to the second position of the slider is against the outer tube, and the other end is against the slider, so that the slider can be pushed against the first position; an inner rod , the section fits the outer tube, one end of which is pivotally inserted into the outer tube by the end of the outer tube provided with the side hole, the two can be relatively stretched but not relatively twisted; They are respectively arranged at one of the side hole positions; when the slider is at the first position, the resisting member can be pressed inward by the more protruding end of the pressing part, so that the resisting member is pressed against the inner rod and The inner rod cannot slide; when the sliding cylinder is at the second position, the resisting member presses down against the inner rod so that the inner rod can slide axially.

Wherein: the inner surface of the pressing part of the sliding cylinder facing the center of the sliding cylinder is an inclined plane from the end corresponding to the first position toward the end of the second position gradually approaching the center of the sliding cylinder; the resisting member has a high coefficient of friction block, and the inner surface is a plane roughly parallel to the outer peripheral surface of the inner rod, and the outer surface is a slope roughly parallel to the inner surface of the pressing part.

Wherein: the edge of the pressing portion of the sliding cylinder is at the end corresponding to the first position, which is an inclined plane gradually approaching the center of the sliding cylinder from the end corresponding to the first position toward the end of the second position, and the edge of the pressing portion One end corresponding to the second position is a plane roughly parallel to the axial direction of the outer tube; the inner rod is respectively provided with at least two positioning holes at different axial positions on the side corresponding to the side hole of the outer tube. The resisting member is a ball, which can lock the side hole of the outer tube and the positioning hole of the inner tube at the same time when it is pressed by the aforementioned plane of the pressing part on the outside.

Wherein: the outer tube is provided with two side holes, and the two side holes are located on two opposite sides.

Wherein: the cross-sections of the outer tube, the sliding cylinder and the inner rod are generally elliptical.

Wherein: the outer tube is covered with a ring, and the inner wall of the sliding cylinder has a shoulder, and the two ends of the spring are respectively against the ring and the shoulder.

Description of drawings

Promptly enumerate two preferred embodiments below in conjunction with accompanying drawing and further illustrate the utility model, wherein:

Fig. 1 is the three-dimensional exploded view of the first preferred embodiment of the utility model;

Fig. 2 is an axial sectional view of the first preferred embodiment of the present invention, wherein the sliding cylinder is in the first position;

Fig. 3 is a sectional view along section line 3-3 in Fig. 2;

Figure 4 is similar to Figure 2, except that the sliding cylinder is in the second position;

Fig. 5 is a diagram of the use state of the first preferred embodiment of the utility model;

Fig. 6 is a three-dimensional exploded view of a second preferred embodiment of the present invention;

Fig. 7 is an axial sectional view of the second preferred embodiment of the present invention, wherein the sliding cylinder is in the first position;

Figure 8 is a cross-sectional view along line 8-8 in Figure 7; and

Fig. 9 is similar to Fig. 7, except that the sliding cylinder is in the second position.

Detailed ways

Please refer to Fig. 1 to Fig. 4 (note: the directions hereinafter are indicated according to the drawings), the non-circular rod 10 with adjustable length in the first preferred embodiment of the present invention includes:

An outer tube 20 (only its top end is shown in the figure), the cross-section is generally oval (or in other words, a rectangle with a circular arc shape), and its outer peripheral surface is provided with two upper rings inwardly recessed near the top end. ditch 21, and an upper convex ring 22 is formed on the inner wall surface corresponding to each of the upper ring grooves 21; a small distance from the two upper ring grooves 21 is provided with two lower ring grooves 23, the same Ground, the lower convex rings 24 are also formed on the inner wall surface corresponding to the lower ring grooves 23; the pipe wall of the outer tube 20 is provided with two opposite rectangular side holes between the upper ring groove 21 and the lower ring groove 23. 25 are located at the two ends of the long axis of the section of the outer tube 20 respectively. An upper ring 26 and a lower ring 27, the cross-section and inner diameter are all matched with the outer pipe 20, and the inner walls of the two 26, 27 respectively have two annular convex lines 28, 29, and the upper ring 26 is sleeved At the top of the outer tube 20, the two upper ring grooves 21 are embedded and positioned by the two ring-shaped convex strips 28, and the lower ring ring 27 is sleeved slightly below the top of the outer tube 20. The strip 29 is embedded in the two lower ring grooves 23 for positioning.

A sliding cylinder 30, the cross-section is (approximately) elliptical corresponding to the outer tube 20, its outer diameter remains unchanged from top to bottom, but the inner diameter is larger in the lower half and smaller in the upper half (that is, the upper half is smaller). half of the cylinder wall is thicker), so that a downward annular shoulder surface 31 is formed at the approximate center of the inner wall surface; in addition, the upper half section of the inner wall surface of the sliding cylinder 30 is provided at the two ends of the long axis of the section. There is a pressing part 32 , and each pressing part 32 faces the inner surface of the center of the sliding cylinder 30 , and is a slope from the top edge of the sliding cylinder 30 downwards and inclined toward the center. The sliding cylinder 30 is sleeved at the top end of the outer tube 20 (approximately between the upper ring 26 and the lower ring 27), and can be positioned at a relatively upper first position ( Fig. 2) and a relatively lower second position (Fig. 4). There is no relative twist between the sliding cylinder 30 and the outer tube 20 (because it is not circular), and the two pressing portions 32 in the sliding cylinder 30 are respectively facing the two side holes 25 of the outer tube 20 .

A spring 40 is adapted to the shape of the outer tube 20 and the sliding tube 30 and coiled in an elliptical shape; The top edge of the lower ring 27 is against the annular shoulder 31 of the slider 30, and the slider 30 can be pushed up to the aforementioned first position without external force, as shown in FIG. 2 .

An inner rod 50 (only its bottom end is shown in the figure) is a hollow pipe body in this embodiment, and its cross-section is also generally oval, and the bottom end is formed by the top end of the outer tube 20 (the upper ring 26) The protruding rings 22 and 24 are inserted into the outer tube 20, and their outer peripheral surfaces lightly touch the inner wall of the outer tube 20, and can slide smoothly along the axial direction.

The two resisting pieces 60 are blocks with a high coefficient of friction (rubber blocks are used in this embodiment), which are respectively arranged at the positions of the two side holes 25 of the outer tube 20, and can be slightly displaced in the radial direction at this position, each resisting Both inner and outer sides of the catch 60 protrude beyond the wall of the outer tube 20, and the inner surface is parallel to the longitudinal plane of the outer peripheral surface of the inner rod 50, while the outer surface is parallel to the inner surface of the pressing part 32 of the slider 30. inclined plane.

The operation mode and actuation principle of the above-mentioned rod 10 are as follows:

When no external force is applied, as shown in Fig. 2 and Fig. 3, the slider 30 is pushed up to the aforementioned first position by the spring 40, so that the pressing portion 32 on the inner wall surface of the slider 30 has the most protruding bottom. Align the side hole 25 of the outer tube 20, and press the resisting member 60 (rubber block) to the limit, so that the inner surface of the two resisting members 60 presses the opposite sides of the outer peripheral surface of the inner rod 50 , the high friction force produced by the viscosity of the rubber makes it difficult for the inner rod 50 to slide up and down, while maintaining the length protruding out of the outer tube 20 at that time, that is, together with the outer tube 20 to form a rod 10 of predetermined length.

When wanting to adjust the length, grasp the sliding cylinder 30 and make it (against the elastic force of the spring 40) slide down to the aforementioned second position, as shown in Figure 4, because the pressing part 32 of the sliding cylinder 30 is downward The shape is inclined and protruding inside, so after moving down, the less protruding top part faces the resisting member 60, so that the outer side of the resisting member 60 will not be strongly pressed, and there is a slight space for radial movement, that is, no The inner rod 50 will be clamped. At this time, the user can pull up the inner rod 50 or insert it down (referring to the relative displacement with the outer tube 20 ), so that the rod 10 becomes longer or shorter.

When the inner rod 50 and the outer tube 20 are relatively stretched to an appropriate length, the user can release the slider 30 and let the slider 30 be pushed back to the first position by the spring 40, because the wedge-shaped pressing part 32 When shifting, it is like gradually protruding inward, so the resisting member 60 parallel to the inner side can be pressed inwardly until the resisting member 60 presses against the inner rod 50, making the inner rod 50 unable to move again. The material is moved, and the rod-shaped object 10 is fixed at the adjusted length. When adjusting, the inner rod 50 and the outer tube 20 can be positioned at any position within the possible range, so that the rod 10 can be adjusted to the most suitable length.

It must be added that, in the structure of the disclosed embodiment, the outer tube 20 is additionally sleeved with the upper ring 26 and the lower ring 27, and its functions include: restricting the sliding cylinder 30, beautifying the outer tube 20 end, and for the bottom of the spring 40 to rely on, etc., it is a practical consideration in production and product design. In other words, if the flange can be directly formed on the outer tube 20 to limit the slider 30 or For the spring 40 to lean against, that is, the upper ring 26 or the lower ring 27 in the above example is required.

In addition, the protruding rings 22 and 24 on the inner surface of the outer tube 20 can reduce the friction area when the inner rod 50 slides.

The utility model can buckle a C-shaped clasp (not shown) at the bottommost end of the inner rod 50, so that the bottom end of the inner rod 50 is stopped by the protruding ring 24 without being pulled out of the outer tube.

Furthermore, in the previous disclosed embodiment, the two opposite sides of the inner rod 50 are clamped with two resisting members 60, so that the rod-shaped object 10 has better stability when the length is locked, but the utility model can also use only one resisting member piece against the inner rod.

Please refer to Fig. 5, it is the usage status of the rod-shaped object 10 of the present embodiment whose length can be adjusted. The height of the plant can be easily adjusted to an appropriate length by the handle of the gardening shears 90 (that is, the rod 10 of the present invention), which is convenient and economical.

Then please refer to Fig. 6 to Fig. 9 again, it is the adjustable length non-circular rod 70 provided by the second preferred embodiment of the present utility model, its components, combination and actions are mostly the same as those of the previous embodiment (Note: The following is a further detailed description of the differences, while the same parts are only briefly explained and will not be repeated), including:

An outer tube 71 is provided with an upper ring 72 and a lower ring 73 at the top, and two opposite circular side holes 74 are provided between the two rings 72 and 73 .

A sliding tube 75 is sleeved on the top of the outer tube 71 and can slide between the first position (Fig. 7) and the second position (Fig. 9): the inner wall of the sliding tube 75 fits in each side hole of the corresponding outer tube 71 One side of 74 is provided with a pressing portion 76, and the edge top side of each pressing portion 76 is an inclined plane from top to bottom toward the center, and turns downward to become a vertical plane parallel to the axial direction; the pressing portion A space 77 for avoiding delay is formed above the 76;

A spring 78 is sleeved on the outer tube 71 and located inside the sliding tube 75, and can push the sliding tube 75 to the first position at ordinary times (FIG. 7).

An inner rod 81 is pivotally inserted into the outer tube 71 with the bottom end downward, and is also a hollow tube body. Two opposite circular positioning holes 82 are respectively provided near the top (note: only the positioning holes 82 near the bottom are shown in the figure), and their diameters are smaller than the side holes 74 .

Two resisting pieces 83, which are round balls in this embodiment, have a diameter smaller than the side hole 74 but larger than the positioning hole 82, and are respectively arranged at the positions of the two side holes.

The positioning and adjustment principles of the rod 70 are as follows: as shown in Figure 7 and Figure 8, when the positioning hole 82 of the inner rod 81 is aligned with the side hole 74 of the outer tube 71, the sliding cylinder 75 can be supported by the spring 78 Resist at the first position, block the vertical side of the pressing part 76 against the outer side of the resisting member 83, and press the resisting member 83 so that it is locked in the positioning hole 82, so that the two resisting members 83 locks the outer tube 71 and the inner rod 81 at the same time, and fixes the rod 70 at a corresponding length.

When the length is to be adjusted, the sliding cylinder 75 is also moved down to the second position, so that the pressing part 76 of the sliding cylinder 75 is moved below the side hole 74 of the outer tube 71, so that the retreat space 77 is on the opposite side. Hole 74, at this time, push and pull the inner rod 81 to force the resisting member 83 to move outward to the outside of the inner rod 81, so that the inner rod 81 and the outer tube 71 can slide relative to each other without hindrance, as shown in FIG. 9 . During the expansion and contraction process, the user can release the sliding cylinder 75, but the sliding cylinder 75 will still be kept at the position because the resisting member 83 is blocked above the pressing part 76 of the sliding cylinder 75 (it can roll in situ at this position). The second position will not be moved up for the time being.

When the inner rod 81 slides to another set of positioning holes 82 to align with the two side holes 74 of the outer tube 71, since the sliding cylinder 75 is still pushed up by the spring 78, it can be immediately pushed up by the top of the pressing part 76. side beveled side, push the resisting piece 83 inward into the positioning hole 82 of the inner rod 81, and then press the vertical side to block the outside, so that the inner rod 81 and the outer tube 71 are repositioned, and the rod 70 becomes into different lengths.

It must be added that, in this embodiment, only a pair of positioning holes 82 are provided at the top and bottom ends of the inner rod 81, so the rod 70 can only be adjusted and positioned to double length (that is, the inner rod 81 is fully extended into the or completely extracted), however, the utility model can of course offer more pairs of positioning holes 82 on the inner rod 81, so that the inner rod 81 can choose to position the shaft at the top of the outer tube 71 in multiple places, so that the rod 70 can be Adjusts to various lengths.

Claims (6)

1. A non-circular rod with adjustable length, comprising: An outer tube, non-circular in cross-section, having at least one side hole extending through the tube wall near one end: A sliding tube, the section of which matches the outer tube, is sleeved on the end of the outer tube provided with the side hole, and can slide between a first position and a second position in the axial direction; the inner wall of the sliding tube is on the There is a pressing part corresponding to the side of each side hole, and the end of the pressing part corresponding to the second position is more protruding from the center of the sliding cylinder than the end corresponding to the first position; A spring is sleeved on the outer tube and located inside the slider, one end corresponding to the second position of the slider is against the outer tube, and the other end is against the slider, so that the slider can be pushed arrive at the first position; an inner rod, the section of which matches the outer tube, one end of which is pivotally inserted into the outer tube by the end of the outer tube provided with the side hole, the two can be relatively stretched but not relatively twisted: and Resisting pieces equal in number to the side holes of the outer tube are respectively arranged at a position of the side holes. 2. The length-adjustable non-circular rod according to claim 1, wherein: the pressing part of the sliding cylinder faces the inner surface of the center of the sliding cylinder, and is formed by one end corresponding to the first position One end toward the second position is gradually approaching the inclined surface of the center of the sliding cylinder; the resisting member is a block with a high friction coefficient, and the inner surface is roughly parallel to the outer peripheral surface of the inner rod, while the outer surface is roughly parallel to the Press against the sloped surface on the inner side of the section. 3. The length-adjustable non-circular rod according to claim 1, wherein: the edge of the pressing part of the slider is formed by the end corresponding to the first position. One end of the first position moves towards the second position and one end gradually approaches the inclined surface of the center of the sliding cylinder, and the edge of the pressing part corresponding to the second position is a plane roughly parallel to the axial direction of the outer tube; The side of the outer tube with the side hole is provided with at least two positioning holes located at different axial positions; Determine the side hole of the outer tube and the positioning hole of the inner tube. 4. The length-adjustable non-circular rod according to claim 1, wherein: the outer tube is provided with two side holes, and the two side holes are located on two opposite sides. 5 . The length-adjustable non-circular rod according to claim 1 , wherein: cross-sections of the outer tube, the sliding tube and the inner rod are generally elliptical. 6. The length-adjustable non-circular rod according to claim 1, wherein: the outer tube is covered with a loop, and the inner wall of the slider has a shoulder, the The two ends of the spring are against the ring and the shoulder respectively.

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