CN206303326U - Cane feet with adjustable and corrected angles - Google Patents

Abstract

The utility model discloses a can change and lead walking stick foot stool of positive angle, include: a bushing, the center of which forms a cylindrical space through a cylindrical side wall; the ball seat is provided with a spherical top wall, and the center of the spherical top wall is provided with a through pivot hole; the ball seat is combined with the bottom end of the liner by a part of the spherical top wall; a bolt, a bolt rod of the bolt is penetrated and pivoted in the penetrating and pivoting hole and the columnar space, and the bolt rod is connected with a supporting rod of which the bottom end penetrates into the columnar space through a penetrating and pivoting component; and the guide ring is sleeved on the bolt rod of the bolt and is positioned between the head of the bolt and the plane of the ball seat. The utility model discloses a ball seat, bush and the bracing piece that the bolt and the pivot subassembly that wear and combine, this bush and this bracing piece can change the angle along the spherical roof of this ball seat, and the spherical roof of this ball seat overlaps in a guide ring contact of this bolt with a plane and pivot, according to leading this bracing piece and bush automatically, makes it be perpendicular with this ball seat and is connected.

Description

Cane feet with adjustable and corrected angles

technical field

The utility model relates to crutches, in more detail, is a structure that can change and guide the angle of the crutch foot, so that the angle of the crutch rod and the foot can be changed, and the two can automatically return to a vertical structure.

Background technique

The underarm crutch 1 shown in FIG. 1 has a support rod 2 and a foot seat 3 connected to the bottom end of the support rod 2 . The support rod 2 and the foot base 3 are fixedly connected. When the user walks with the crutch 1, the crutch 1 will be vertically or obliquely supported on the ground. When the crutch 1 is perpendicular to the ground, the bottom surface of the foot base 3 is in full contact with the ground, which can provide stable support. When the crutch 1 is inclined to the ground, the foot base 3 only touches the ground with a partial bottom surface, and the support is unstable. Except armpit crutches, other crutches, arm support crutches, etc. that have the support bar 2 and the foot seat 3 as fixed connection also have the above problems.

Utility model content

The utility model aims at the problem of unstable support of the above-mentioned crutches and walking sticks, and provides a crutch foot seat that can change and guide angles.

The utility model is a crutch foot seat which can change and guide the angle, comprising:

A bushing, the center of the bushing forms a columnar space through a cylindrical side wall, and a gasket is arranged around the inner circumference of the bottom end of the bushing;

A ball seat has a spherical top wall, the center of the spherical top wall has a pivot hole, the inner wall of the spherical top wall has a plane surrounding the pivot hole, the ball seat is combined with a part of the spherical top wall the bottom end of the bushing, the gasket is in contact with the outer wall surface of the spherical top wall;

A bolt, the head of the bolt is facing downwards, the bolt rod is pivoted through the pivot hole of the ball seat and the columnar space of the bushing, the bolt rod is connected to a bottom end through a pivot assembly and penetrates into the columnar space space support rods; and

A pilot ring is threaded through the shank of the bolt and is located between the head of the bolt and the plane of the ball seat, and the ring surface of the pilot ring contacts the plane.

Wherein, the bottom of the bush forms a hierarchical space through an arc concave annular surface and a layered inner wall; the gasket is fixed in the layered inner wall; the part of the spherical top wall is combined in the layered space.

Wherein, the inner edge of the lower end of the layered inner wall has a chamfer, and there is a gap between the chamfer and the spherical top wall.

Wherein, a gap is formed between the spherical top wall and the arc concave ring surface of the bushing.

Wherein, the part where the gasket contacts the spherical top wall is an arc-shaped contact surface.

Wherein, the pivot hole is a tapered hole with a wide top and a narrow bottom.

Wherein, the ball seat further includes an annular side wall connected to the spherical top wall, the annular side wall is combined with a base, and the base has a horizontal bottom surface.

The utility model has the advantages of:

Based on the contact between the spherical top wall of the ball seat and the washer of the bushing, the bushing can change the angle around the central axis on the spherical top wall, and the support rod based on the crutch is connected to the bushing through the pivot assembly The angle of the support rod of the crutch can also be changed, and the foot base is always kept perpendicular to the ground, and the base of the foot base is always in full contact with the ground to stably support the crutch.

When the base of the crutch is not supported on the ground, the plane of the spherical top wall of the ball seat can be used to guide the guide ring to be horizontal, thereby automatically aligning the support rod and bushing of the crutch so that it is aligned with the base Connect vertically.

The arc-shaped contact surface of the washer in the bush is in annular contact with the spherical top wall of the ball seat, reducing the contact area between the washer and the spherical top wall, reducing the wear of the two, and making the two still have a stable contact relation.

The gap formed between the arc-concave annular surface and the chamfer of the bushing and the spherical top wall respectively has the function of reducing the relative contact area and relative friction between the bushing and the spherical top wall.

The pivot hole of the ball seat is a tapered hole with a wide top and a narrow bottom, so that the support rod has a sufficient inclination angle.

The spring provides the elastic buffering effect of the support rod, reducing the reaction force transmitted to the support rod when the foot is on the ground.

The foot seat of the utility model can be applied to armpit crutches, arm support crutches, walking sticks or other walking aids.

Description of drawings

Fig. 1 is the appearance diagram of underarm crutches in the prior art.

Fig. 2 is the appearance drawing of walking stick of the present utility model.

Fig. 3 is a three-dimensional exploded view of the foot seat of the present invention.

Fig. 4 is a three-dimensional combined sectional view of the foot base of the present invention.

Fig. 5 is one of the combined sectional views of the foot base of the present invention.

Fig. 6 is the second combination sectional view of the foot base of the present invention.

In the figure: 1-armpit crutch; 2-support rod; 3-foot seat; 10-crutch; 11-support rod; 12-foot seat 13-grip; 20-bush; 21-cylindrical side wall ;22-column space; 23-arc concave ring; 24-layered inner wall; 25-layer space; 26-supporting part; 27-washer; 28-contact surface; 29-chamfer; 31-spherical top wall; 32-annular side wall; 33-pivot hole; 34-plane; 35-gap; 36-gap; 37-base; 38-bottom; 40-bolt; 41-pivot assembly; 42 -spring; 43-end sleeve; 44-washer; 45-guiding ring; 46-nut; 47-bolt rod; 48-flange;

detailed description

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the utility model and implement it, but the examples given are not intended to limit the utility model.

As shown in FIG. 2 , it is an appearance view of a crutch with a crutch foot seat that can change and guide angles provided by the utility model. The crutch 10 includes a support rod 11 , a foot base 12 connected to the bottom of the support rod 11 , and a handle 13 connected to the top of the support rod 11 .

As shown in Figures 3 to 5, the foot base 12 includes:

A bushing 20, the center of the bushing 20 forms a columnar space 22 through a cylindrical side wall 21, the columnar space 22 runs through the top and bottom of the bushing 20, and the bottom of the bushing 20 passes through an arc recess The annular surface 23 and the first-order layered inner wall 24 form a layered space 25; the layered space 25 communicates with the columnar space 22; the cylindrical side wall 21 protrudes toward the center with a supporting portion 26; the layered inner wall 24 A washer 27 is fixed in the middle, and the washer 27 is an annular structure made of a wear-resistant material. The inner edge of the lower end of the washer 27 has an arc-shaped contact surface 28 . The lower inner edge of the layered inner wall 24 has a chamfer 29 .

A ball seat 30 is a hollow seat body formed by connecting a spherical top wall 31 and a vertical annular side wall 32 . A center of the spherical top wall 31 has a pivot hole 33 . The pivot hole 33 is a tapered hole with a wide top and a narrow bottom. The inner wall of the spherical top wall 31 has a plane 34 surrounding the pivot hole 33 . The ball seat 30 is combined with a part of the spherical top wall 31 in the step space 25 of the bushing 20 . The washer 27 in the hierarchical space 25 is in contact with the outer wall surface of the spherical top wall 31 through the arc-shaped contact surface 28, and a gap is formed between the spherical top wall 31 and the arc concave annular surface 23 of the bushing 20. Clearance 35. A gap 36 is also formed between the chamfer 29 of the layered inner wall 24 and the outer surface of the spherical top wall 31 . The annular sidewall 32 of the ball seat 30 is combined with a base 37 having a horizontal bottom surface 38 .

A bolt 40 passes through the pivot hole 33 of the ball seat 30 and enters the columnar space 22 of the bushing 20 with the head facing downward. The bolt 40 is connected to the support rod 11 of the crutch 10 through a pivot assembly 41; the pivot assembly 41 includes a spring 42, an end sleeve 43, a washer 44 and a nut 46; the bolt 40 is located in the columnar space 22 The bolt rod 47 in the middle passes through the spring 42, the end sleeve 43, and the washer 44 in sequence, and is locked with the nut 46 at the end of the bolt rod 47. The top end of the spring 42 abuts against the end sleeve 43 , and the bottom end is supported by the supporting portion 26 of the bushing 20 . The end cover 43 is further combined with the inside of the bottom end of the support rod 11 of the crutch 10 . The bottom end of the support rod 11 is pivoted in the columnar space 22 of the bushing 20 , and a rubber washer 49 is fixed on the cylindrical sidewall 21 of the bushing 20 , and the rubber washer 49 contacts the outer wall of the support rod 11 .

A pilot ring 45 is threaded through the bolt rod 47 of the bolt 40, and is interposed between the flange portion 48 of the bolt 40 and the plane 34 of the ball seat 30, the ring surface of the pilot ring 45 and the plane 34 contacts.

As shown in FIGS. 5 and 6 , based on the contact between the spherical top wall 31 of the ball seat 30 and the washer 27 of the bushing 20 , the bushing 20 can change the angle around the central axis on the spherical top wall 31 , Based on the connection of the support rod 11 of the crutch 10 with the bushing 20 through the pivot assembly 41, the angle of the support rod 11 of the crutch 10 can also be changed, and the guide ring 45 also tilts following the bolt 40, so that the The guide ring 45 is not in full contact with the plane 34 . Accordingly, when the user uses the crutch 10, if the supporting rod 11 of the crutch 10 presents an inclined angle to the ground, the ball seat 30 and the base 37 remain perpendicular to the ground, and the bottom surface of the base 37 is still fully in contact with the ground. , providing comprehensive support. The spring 42 is compressed to form a buffering effect on the support rod 11 , reducing the reaction force transmitted to the support rod 11 when the foot seat 12 touches the ground.

When the foot base 12 leaves the ground, for example, the user lifts the crutch 10, based on the release of the spring 42, the guide ring 45 will automatically return to the plane 34 along the plane 34 of the ball seat 30. According to the state of contact, guide the pivot assembly 41 and the support rod 11 to a vertical state, so as to achieve the purpose of automatically aligning the support rod 11 and the bushing 20 to be vertical.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the utility model, and the protection scope of the utility model is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present utility model are all within the protection scope of the present utility model. The scope of protection of the utility model shall be determined by the claims.

Claims (7)

1. A crutch foot seat that can change and guide the angle, it is characterized in that it includes: A bushing, the center of the bushing forms a columnar space through a cylindrical side wall, and a gasket is arranged around the inner circumference of the bottom end of the bushing; A ball seat has a spherical top wall, the center of the spherical top wall has a pivot hole, the inner wall of the spherical top wall has a plane surrounding the pivot hole, the ball seat is combined with a part of the spherical top wall the bottom end of the bushing, the gasket is in contact with the outer wall surface of the spherical top wall; A bolt, the head of the bolt is facing downwards, the bolt rod is pivoted through the pivot hole of the ball seat and the columnar space of the bushing, the bolt rod is connected to a bottom end through a pivot assembly and penetrates into the columnar space space support rods; and A pilot ring is threaded through the shank of the bolt and is located between the head of the bolt and the plane of the ball seat, and the ring surface of the pilot ring contacts the plane. 2. The crutch foot seat according to claim 1, wherein the angle can be changed and corrected, wherein, the bottom of the bush forms a hierarchical space through an arc-shaped concave ring surface and a layered inner wall; the layered shape The washer is fixed in the inner wall; the part of the spherical top wall is combined in the hierarchical space. 3. The crutch foot seat according to claim 2, wherein the lower end inner edge of the layered inner wall has a chamfer, and there is a gap between the chamfer and the spherical top wall. gap. 4 . The crutch foot seat with variable and corrected angles according to claim 2 , wherein a gap is formed between the spherical top wall and the arc concave ring surface of the bushing. 5 . The crutch foot seat with variable and corrected angles according to claim 1 , wherein, the part where the washer contacts the spherical top wall is an arc-shaped contact surface. 5 . 6 . The crutch foot seat according to claim 1 , wherein the angle can be changed and corrected, wherein the pivot hole is a tapered hole with a wide top and a narrow bottom. 7. The crutch foot seat according to claim 1, wherein the angle can be changed and corrected, wherein, the ball seat further comprises an annular side wall connected to the spherical top wall, and the annular side wall is connected to a combined with the base, and the base has a horizontal bottom surface.