CN213490257U - Combined type extension length adjusting mechanism - Google Patents

Abstract

The utility model provides a modular extension length adjustment mechanism, including being responsible for, be responsible for including upper segment pipe, lower segment pipe, prolong its axial on the upper segment pipe and be provided with a plurality of interval distribution's mounting hole F, have the spring catch on the lower segment pipe, the spring catch is installed in mounting hole F, the high fine setting subassembly of upper end fixedly connected with of upper segment pipe. According to the strength defect of light materials such as aluminum profiles, the lower section pipe is designed by matching the spring pin with the mounting hole F, the distance between the mounting holes F is not too close to meet the strength requirement, meanwhile, the matching of the lower section pipe and the upper section pipe is mainly used for roughly adjusting the vertical height, and the structure of the height fine adjustment assembly matched with the ratchet wheel, the pawl, the ratchet bar and the ratchet stop belongs to a fine adjustment type, so that when the height fine adjustment assembly is applied to a crutch, the comfortable height for walking of a human body can be effectively adjusted.

Description

Combined type extension length adjusting mechanism

Technical Field

The utility model relates to a combination formula extension length adjustment mechanism, concretely relates to combination formula extension length adjustment mechanism.

Background

The walking stick is mainly used for walking invariable or the injured weak group of shank, the walking stick of walking stick structure is used for old person or person of mountain-climbing more, the walking stick on the current market is the stick-shaped structure that a single one is used for assisting the walking mostly, this kind of structure can not satisfy people's use under the real complex condition, especially the injured person of shank needs the supplementary walking of hand support walking stick to bring very big inconvenience for life and work in long-time walking process, the supplementary running gear price of human ectoskeleton is higher again simultaneously, it is indemnable to the people of underarm. Therefore, the multifunctional crutch is designed. To multi-functional walking stick, need adjust its height that supports the position, combine together coarse adjusting and fine setting for the realization, specially designed the utility model discloses.

Disclosure of Invention

The utility model is not enough to prior art, the utility model provides a modular extension length adjustment mechanism, according to the intensity shortcoming of light material self such as aluminium alloy, lower section pipe is by spring catch and mounting hole F complex design, mounting hole F's interval should not be too close, in order to satisfy the intensity requirement, and simultaneously, lower section pipe and the main coarse adjusting of upper segment pipe height from top to bottom, the ratchet of high fine setting subassembly, the pawl, the ratchet bar, ratchet dog matched with structure belongs to the fine setting type, when using to the walking stick, accomplish more effectual regulation to the comfortable height of human walking, adopt this kind of locking mode of heterotypic ratchet pawl more firm reliable simultaneously, it can not appear rocking to compare the fixed mode of spring catch compacter, give shank or ankle wounded's further protection. Two adjusting modes are adopted, so that the processing cost and the process flow of the special ratchet wheel and pawl structure are saved on the basis of ensuring the service performance of the crutch.

In order to achieve the above object, the utility model provides a following technical scheme: modular extension length adjustment mechanism, including being responsible for, be responsible for including upper segment pipe, lower segment pipe, extend its axial on the upper segment pipe and be provided with a plurality of interval distribution's mounting hole F, have the spring catch on the lower segment pipe, the spring catch is installed in mounting hole F, the high fine setting subassembly of upper end fixedly connected with of upper segment pipe.

On the basis of the scheme, preferably, the height fine adjustment assembly comprises a stand column, the stand column is provided with two strip-shaped through holes which are arranged in parallel, a sliding block A is arranged in each strip-shaped through hole and fixedly connected with a connecting piece on the supporting part, ratchet bars are arranged on two side walls in the length direction of each strip-shaped through hole, flanges are arranged at intervals of tooth parts of the ratchet bars, a fixed shaft A is fixedly arranged on the sliding block A and is positioned in each strip-shaped through hole, a ratchet wheel which is in rotating fit with the fixed shaft A is arranged on each fixed shaft A, a pawl is arranged on each sliding block, a connecting rod is fixedly arranged on each ratchet wheel, ratchet wheel stop blocks are arranged on two sides of each connecting rod, a ratchet wheel tooth groove A, and a slope surface A inclined upwards in an inclined direction towards the flange is arranged on one side of the upper end of the ratchet bar towards the flange, and a slope surface B inclined downwards in an inclined direction towards the ratchet bar is arranged on one side of the lower end of the flange towards the ratchet bar.

In addition to the above-described embodiments, the ratchet tooth grooves B and C are preferably V-shaped.

On the basis of the scheme, preferably, the upper end and the lower end of the flange are fixedly connected with the upper end and the lower end of the ratchet bar respectively.

In addition to the above-mentioned aspect, preferably, the lower end of the main pipe is screwed with a support leg.

Compared with the prior art, the beneficial effects of the utility model are that:

1. through angle modulation and shank supporting part matched with design, fix the shank on the shank supporting part, rotate thigh fixed part, fix thigh fixed part and thigh mutually, can regard as the artificial limb to use, can liberate both hands, it is convenient to bring life and work, adjusts the support of shank supporting part and the angle of horizontal plane through angle modulation ware, can carry out angle modulation according to the shank state of an illness, adjusts the comfort level at any time, and the application is wide. Meanwhile, the supporting part can be detached and mounted on the supporting part to form the crutch, so that the diversity of functions of the crutch is realized.

2. The angle modulation adopts the push type profile of tooth to adjust (the radial normal running fit's of axial motion condition between pivot B and the supporting part), and the even profile of tooth meshing card of angle distribution makes more firmly not hard up after supporting the atress, and the terminal surface of pivot B is equipped with limit structure and prevents that tooth piece structure A from being extruded the sleeve by the spring.

3. In the scheme, the plug-in type quick grafting structure formed by matching the plug pin 13 with the corresponding mounting hole can be quickly switched between a hand-held type (conventional crutch) and a support type (artificial limb type) crutch, so that the effect of one rod with multiple purposes is achieved.

4. The anti-loosening structure which is formed by the spring A, the sliding block, the limiting sliding block and the blind hole and has a protection effect on the plug pin prevents the shank supporting part from being connected with the connecting shaft and between the shank supporting part and the fixing shaft in a loosening manner, and the structure is firmer.

5. The height about the main coarse adjustment of cooperation of lower segment pipe and upper segment pipe, height fine setting subassembly's ratchet, pawl, ratchet dog matched with structure belong to the fine setting type, accomplish more effective regulation to the comfortable height of human walking, adopt this kind of locking mode of heterotypic ratchet pawl more firm reliable simultaneously, compare the fixed mode of spring catch compacter can not appear rocking, give shank or ankle wounded's further protection. Two adjusting modes are adopted, so that the processing cost and the process flow of the special ratchet wheel and pawl structure are saved on the basis of ensuring the service performance of the crutch.

Drawings

FIG. 1 is a schematic structural diagram of the present invention

FIG. 2 is a schematic view of the assembly of a thigh securing portion and a lower leg support portion;

FIG. 3 is a schematic view of a thigh fixing part;

FIG. 4 is a schematic view of the calf support and angle adjuster assembly;

FIG. 5 is a schematic view of the structure of the lower leg support;

FIG. 6 is a schematic view of the structure of the angle adjuster;

FIG. 7 is a schematic view of the structure of the connector;

FIG. 8 is a perspective view of the support portion;

FIG. 9 is a front view of the support portion;

FIG. 10 is a schematic view of the assembly of the slider A and the ratchet stop;

fig. 11 is a cross-sectional view of fig. 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention, and herein, detachable fixation means that the original performance of the component is not damaged and can be disassembled.

As shown in fig. 1-11, a multi-function crutch, comprising,

a support part 1;

the thigh fixing part 2 is characterized in that two ends of the lower end of the thigh fixing part are in rotating fit with the supporting part through a rotating shaft A5, and the upper end of the thigh fixing part is provided with a fixing part for fixing a thigh;

the angle regulator 4 is fixed on the supporting part, the shank supporting part is fixed on the angle regulator, the angle regulator comprises a rotating shaft B6 and a sleeve 7, the axis of the rotating shaft B is parallel to the axis of the rotating shaft A, a tooth block structure A8 is fixedly arranged at the end part of the rotating shaft B, a tooth block structure B9 is fixedly arranged on the inner wall of the sleeve, the tooth block structure A is meshed with the tooth block structure B, a spring 10 is arranged in the sleeve, the spring is positioned between the bottom of the sleeve and the end surface of the rotating shaft B, a limiting structure 11 for preventing the tooth block structure B from sliding out of the sleeve is arranged on the end surface of the rotating shaft B, wherein,

the rotating shaft B is axially fixed and radially matched with the supporting part in a rotating way, and the sleeve pipe is axially moved and radially matched with the supporting part in a fixed way, or

The rotating shaft B and the supporting part are in axial movement and radial rotation fit, and the sleeve and the supporting part are fixedly connected in the axial direction;

and the lower leg supporting part 3 is detachably and fixedly arranged on the radial direction of the rotating shaft B, and a connecting part 14 detachably connected with the lower leg supporting part is arranged on the supporting part.

In the scheme, the thigh fixing part and the supporting part are in rotating fit through the rotating shaft A, so that the thigh fixing part can rotate relative to the supporting part, the rotating angle is arbitrary, and the adjustment is convenient.

Through angle modulation and shank supporting part matched with design, fix the shank on the shank supporting part, rotate thigh fixed part, fix thigh fixed part and thigh mutually, can regard as the artificial limb to use, can liberate both hands, it is convenient to bring life and work, adjusts the support of shank supporting part and the angle of horizontal plane through angle modulation ware, can carry out angle modulation according to the shank state of an illness, adjusts the comfort level at any time, and the application is wide. Meanwhile, the supporting part can be detached and mounted on the supporting part to form the crutch, so that the diversity of functions of the crutch is realized.

Wherein, angle modulation adopts push type profile of tooth to adjust (the radial normal running fit's of axial motion condition between pivot B and the supporting part), and the even profile of tooth meshing card of angle distribution is died and is made more firm not hard up after supporting the atress, and the terminal surface of pivot B is equipped with limit structure and prevents that tooth piece structure A from being extruded the sleeve by the spring.

The connecting part is a fixed shaft 14 fixed on the supporting part, the fixed shaft is provided with a mounting hole A arranged in the radial direction, the shank supporting part is provided with a mounting hole B15, and a bolt penetrates through the mounting hole A and the mounting hole B to fix the shank supporting part and the fixed shaft to form the crutch.

The connecting shaft 12 is fixedly arranged on the rotating shaft B in the radial direction, a mounting hole C is formed in the connecting shaft, and a bolt penetrates through the mounting hole C and the mounting hole B to fixedly connect the shank supporting part and the connecting shaft.

In the scheme, the plug-in type quick grafting structure formed by matching the plug pin 13 with the corresponding mounting hole can be quickly switched between a hand-held type (conventional crutch) and a support type (artificial limb type) crutch, so that the effect of one rod with multiple purposes is achieved.

The shank supporting part is provided with a blind hole 16 arranged along the axial direction of the shank supporting part, the side wall of the shank supporting part is provided with a strip-shaped hole 17 arranged along the axial direction of the shank supporting part, a sliding block 18 is arranged in the blind hole, the side wall of the sliding block is provided with a limiting sliding block 19 arranged in the strip-shaped hole, a spring A20 is arranged between the bottom of the sliding block and the bottom of the blind hole, and the spring A, the sliding block and the bottom of the blind hole form elastic.

In this scheme, through the locking structure that moves that has the guard action to the plug pin that spring A, slider, spacing slider, blind hole formed, it is not hard up to prevent to be connected between shank supporting part and the connecting axle and shank supporting part and the fixed axle, and the structure is more firm.

The supporting part is provided with a mounting hole D21, the rotating shaft A penetrates through the mounting hole D, fixing rods 23 are radially and fixedly mounted at two ends of the rotating shaft A, a U-shaped part 24 is fixedly mounted at the upper end of each fixing rod, two ends of the U-shaped part are respectively fixedly connected with one fixing rod, a sub-buckle is fixedly mounted on one fixing rod, a female buckle with an elastic cord is fixedly mounted on the other fixing rod, and a fixing part for fixing a thigh is surrounded by the sub-buckle and the female buckle after buckling. The primary and secondary buckles can be replaced by adhesive buckles, wherein the number of the U-shaped parts can be more than one.

In this scheme, should be axial fixity radial pivoted cooperation relation between pivot A and the supporting part, realize the angular adjustment of fixed part, under the fixed condition of shank supporting part rigidity, can be through the regulation fixed very high comfort level to thigh position.

The U-shaped part is sleeved with a soft cushion 25 which is in flexible contact with the thigh to protect the thigh.

Have the mounting hole E22 that supplies pivot B to pass on the supporting part, the axis of mounting hole E and mounting hole D is in same vertical face, and mounting hole E is located the below of mounting hole D, the connecting axle passes the concave part 26 that supplies the knee to put into of the supporting part side that sets up, the concave part agrees with the knee, improve the comfort level of knee department, play complementary fixed action to the knee part simultaneously, the protection knee, the shank is protected simultaneously, the concave part cooperates with the U-shaped portion, the U-shaped portion is fixed thigh upper end, the concave part is spacing near the knee department to the thigh, the concave part can cooperate with the son at dead lever middle part, female buckle or the buckle formula elastic cord that bonds form the fixed knot structure to the thigh lower extreme, can reduce the quantity of U-shaped portion, reduce the whole weight of walking stick, and save cost. When the rotating shaft B is pressed, the connecting shaft is transversely deviated, the installation of the shank supporting part is not influenced in the allowable range of the matching distance between the connecting shaft and the supporting part, and the transverse deviation does not exceed the distance of one tooth thickness.

The support part comprises a main tube 27, the lower end of which is in threaded connection with a support foot 28.

The main pipe comprises an upper section pipe 30 and a lower section pipe 29, a plurality of mounting holes F31 distributed at intervals are formed in the upper section pipe along the axial direction of the upper section pipe, a spring pin 32 is arranged on the lower section pipe and is mounted in the mounting holes F, and the overall height of the multi-stage adjusting support part is achieved. The rotating shaft A and the rotating shaft B are fixed at the upper end of the upper-section pipe.

In the technical scheme of this application, the material of all spare parts is with the light as the preference, reduces holistic weight.

The upper end of the upper section pipe is fixedly connected with a height fine adjustment assembly, the height fine adjustment assembly comprises a stand column 33, the stand column is provided with two strip-shaped through holes 34 which are arranged in parallel, a slide block A35 is arranged in each strip-shaped through hole, the slide block A is fixedly connected with a connecting piece 36 on a supporting part, a thigh fixing part and a shank fixing part are arranged on each connecting piece, ratchet bars 37 are arranged on two side walls in the length direction of each strip-shaped through hole, and flanges 38 are arranged at intervals between the ratchet bars and tooth parts of the ratchet bars, a fixed shaft A39 is fixedly arranged on each slide block A, a ratchet 40 which is in rotating fit with the fixed shaft A is arranged on each fixed shaft A, a pawl for limiting rotation of the ratchet is arranged on each slide block, a connecting rod 41 is fixed on each ratchet, ratchet stoppers 42 are arranged on two sides of each connecting rod, a ratchet tooth, the ratchet tooth socket B and the ratchet tooth socket C are V-shaped, the design of the V-shape ensures that the pawl and the ratchet cannot be locked, when the slide block moves up and down, the pawl can slide along two slope surfaces of the V shape under the action of the self elastic force and generate friction force for limiting the rotation of the ratchet, one side of the upper end of the ratchet bar towards the flange is provided with a slope surface A46 inclining upwards towards the flange, when the slide block A moves upwards, the slope surface A enables the ratchet stop block to approach the flange, so that the pawl is clamped in the ratchet tooth socket C, at the moment, the ratchet stop block is positioned at the interval between the ratchet bar and the flange and can be lowered to the lowest point by moving the slide block, one side of the lower end of the flange towards the ratchet bar is provided with a slope surface B47 inclining downwards towards the ratchet bar, the slope surface B enables the ratchet stop block to approach the ratchet bar, so that the pawl slides into the ratchet tooth socket B, then the sliding block A is moved upwards, the pawl moves in the ratchet tooth groove B and props against the ratchet wheel by the elastic force of the pawl, so that the sliding block A can drive the ratchet wheel stop block to slide upwards along the edge of the ratchet rack, the sliding block A is moved downwards at the opening sliding to the ratchet tooth groove A, and the ratchet wheel stop block can be moved into the ratchet tooth groove A. In this scheme, the distance between ratchet axis and the flange should be greater than ratchet axis and the radial length of ratchet dog to guarantee that the ratchet dog can not the level or upwarp the phenomenon and lead to the card to die, can't be in domatic B department with the problem of ratchet dog direction ratchet. Because the self intensity shortcoming of light materials such as aluminium alloy, the lower section pipe is by spring catch and mounting hole F complex design, mounting hole F's interval should not be too close, consequently, the height about the main coarse adjustment of lower section pipe and upper segment pipe of cooperation, the ratchet of high fine setting subassembly, the pawl, the ratchet bar, ratchet dog matched with structure belongs to the fine setting type, accomplish more effective regulation to the comfortable height of human walking, adopt this kind of locking mode of heterotypic ratchet pawl more firm reliable simultaneously, it is compacter to compare the fixed mode of spring catch, fine setting in-process can not appear rocking, give shank or ankle wounded's further protection. Two adjusting modes are adopted, so that the processing cost and the process flow of the special ratchet wheel and pawl structure are saved on the basis of ensuring the service performance of the crutch. In the scheme of this application, when the ratchet dog is located ratchet tooth's socket A, the downward atress is because ratchet tooth's socket A blocks, is obstructed, and during normal regulation, the ratchet dog can only upwards remove between ratchet tooth's socket A, makes the ratchet dog touch the domatic A of upper end when reaching the highest, and the direct domatic B department of going down to the bottommost of ratchet dog carries out unidirectional modulation again.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (5)

1. Modular extension length adjustment mechanism, its characterized in that, including being responsible for, is responsible for including upper segment pipe, lower section pipe, prolongs its axial on the upper segment pipe and is provided with a plurality of interval distribution's mounting hole F, has the spring catch on the lower section pipe, and the spring catch is installed in mounting hole F, and the upper end fixedly connected with height fine setting subassembly of upper segment pipe.

2. The combined type extension length adjusting mechanism of claim 1, wherein the height fine-adjusting assembly comprises a vertical column, the vertical column is provided with two parallel strip-shaped through holes, a slide block A is arranged in each strip-shaped through hole, the slide block A is fixedly connected with a connecting piece on the supporting part, two side walls of each strip-shaped through hole in the length direction are provided with a ratchet bar and flanges arranged at intervals with tooth parts of the ratchet bar, a fixed shaft A is fixedly arranged on the slide block A and is positioned in each strip-shaped hole, a ratchet wheel which is matched with the fixed shaft A in a rotating manner is arranged on the fixed shaft A, a pawl is arranged on the slide block, a connecting rod is fixed on the ratchet wheel, ratchet wheel stop blocks are arranged on two sides of the connecting rod, a ratchet wheel A for limiting the ratchet wheel stop blocks to move downwards is arranged on the ratchet bar, a ratchet wheel tooth socket B and a ratchet, a slope surface B inclined downwards towards the ratchet bar is arranged on one side of the lower end of the flange towards the ratchet bar.

3. The combined extension length adjustment mechanism of claim 1, wherein the ratchet tooth grooves B and C are V-shaped.

4. The modular extension length adjustment mechanism of claim 1, wherein the upper and lower ends of the rib are fixedly connected to the upper and lower ends of the ratchet bar, respectively.

5. The modular extension length adjustment mechanism of claim 1, wherein the lower end of the main tube is threaded with a support foot.

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