CN201375646Y - Walk aid appliance for escalading obstacle - Google Patents

Abstract

The utility model relates to an improved walk aid appliance for escalading obstacle with high difficulty. The walk aid appliance consists of a front frame body, a back frame body, at least two back wheels and at least one front wheel. The front wheels are supported by retaining frames of the front wheels; and the retaining frames can be disassembled and are connected with the frame body to support at least one front wheel so as to move between a forward low position and a backward high position relative to the frame body. When under the forward low position, the retaining frames support the frame body on a surface. Further more, the walk aid appliance also comprises a temporary forward support unit which is positioned above the frame body, when at least one of the front wheels is under backward high position, the temporary forward support unit supports the surface frame body on the surface. The temporary forward support unit is connected to the frame body, therefore, when the frame body is supported by at least one of the front wheels at the forward position, the bottom part of the temporary forward support unit has a certain distance from a support surface.

Description

Barrier is climbed up and over walking aid

Technical field

This utility model relates to a kind of walking aid, the particularly a kind of walking aid that can climb up and over the certain altitude barrier.

Background technology

Current common walking aid can be crossed some highly lower barriers easily, as: protrude the slabstone on ground or the like a little on the sewer well lid high slightly, the road surface on threshold, the footpath than ground.But user is when using existing walking aid to cross the barrier with further height, and for example: kerb, step highway section, terraced fields or the like often need to spend sizable strength.Do not establishing disabled's designated lane or climbing up and in the imperfect as yet environment of the special auxiliary equipment of this type of barrier, this barrier is seen everywhere, thereby has caused many puzzlements to disabled.

When ongoing walking aid wheel ran into the barrier (height barrier) with certain altitude, such as kerb, the forward movement of walking aid was forced to stop.In this case, want to cross such obstacle, the sizable angle that just walking aid must be receded, thus the front-wheel of walking aid is lifted to the highly top of barrier.Then, under heeling condition, move forward walking aid, also can be elevated on the barrier up to trailing wheel.Walking aid is receded, may cause handle to move backward, until the top of trailing wheel even the back of trailing wheel.This posture causes the stability of walking aid to reduce; Simultaneously, because the walking aid front-wheel that tilts moves forward on barrier, and trailing wheel is still on former support ground, therefore in this case, and walking aid even the body weight that might can't bear disabled.The disabled that need the dependence walking aid to walk still need other support when the climbing barrier thing, this obviously is extremely inconvenient.In addition, walking aid is when climbing up and over the process medium dip, and its center of gravity is transferred to the trailing wheel of walking aid.This back of center of gravity has certain danger to transfer, user may together with walking aid in the lump backward overturning on ground.Particularly for the personage at advanced age, promptly walking aid uses most of personage of crowd, just is easy to disequilibrium when the climbing barrier thing originally.Moreover and since advanced age the personage skeletal structure generally all be highly brittle a little less than, trip and just may cause very serious consequence.Personage's wrestling at advanced age may cause that pelvis breaks, fracture etc., and then causes needs to restore for a long time; And in some cases, the wrestling in addition can cause the infringement that can't remedy.

Summary of the invention

Goal of the invention of the present utility model is in order to overcome the weak point of existing walking aid, for providing a kind of obstacle, disabled climb up and over walking aid, in climbing up and over, increase the comfort level of user, and reduce the risk of falling down as kerb, rugged road surface equal altitudes barrier process.

The technical solution of the utility model is: a kind of obstacle is climbed up and over walking aid, converts for disabled climb up and over the height barrier, and this barrier is climbed up and over walking aid and comprised:

The front and back support body;

Handle is positioned at above the support body, and user can holds handle, promotes walking aid walking forward on the road surface;

At least two trailing wheels are positioned at the support body back segment, provide support when walking on the road surface for support body;

At least one front-wheel is positioned at the support body leading portion;

A front-wheel retainer is connected on the support body, and is detachable, is used to front-wheel to provide support, thereby guarantees that walking aid can move around between a high position in move ahead relatively low level and the back of support body, is reached for the purpose that support body provides support; With

At least one support unit that temporarily moves ahead, be positioned at the support body leading portion, currently take turns that to be positioned at the back be that support body provides support when a high position on the barrier surface,, between this interim support unit and the road surface of walking certain distance is arranged so if front-wheel is positioned at the low order position that moves ahead.

Described front-wheel adopts pivotally connected mode to be connected on the walking aid support body by a retainer centring point, and front-wheel can be moved around along an arcual route between a high position in move ahead low level and back.

Described obstacle is climbed up and over walking aid and is in when moving ahead low level, and the wheel shaft of its front-wheel is positioned at the vertical line front of retainer centring point, and current the wheel is positioned at the back when a high position, and wheel shaft is positioned at the back of this vertical line.

The front-wheel that described obstacle is climbed up and over walking aid is in when moving ahead low level, and the support unit that temporarily moves ahead is positioned at the top of front-wheel, and when front-wheel was in the back to a high position, the support unit that temporarily moves ahead was positioned at the place ahead of front-wheel.

Described obstacle is climbed up and over walking aid and also is provided with a bolt mechanism by the user operation, front-wheel can be locked in preceding line position by this bolt mechanism, user is as long as remove the locking of bolt mechanism to front-wheel, and front-wheel just can pro-line position and back mobile between the position.

Described front-wheel can adopt universal wheel.

Described obstacle is climbed up and over walking aid can also be provided with gigback, is returned to preceding line position in order to impel front-wheel.

The front-wheel that described obstacle is climbed up and over walking aid is positioned at when moving ahead low level, distance between its interim support unit bottom and the walking road surface must not be less than 10 centimetres, preferably between 10 centimetres to 20 centimetres, its position can be regulated and parallel with front-wheel according to the support body position.

Described universal wheel, it constitutes structure and comprises:

A center wheel bone can center on a main axis rotation, contains a plurality of bracing frame slotted hole structures on the wheel bone, and the purpose of design of bracing frame slotted eye is intended to connect the rolling element bracing frame, thereby for providing support along the rolling element of taking turns the distribution of bone outer rim;

A plurality of rolling elements are installed to the back shaft that is connected rolling element main body and two ends on the lug and form with one by an intermediate host, two isolating conical end in the left and right sides respectively, the center side of intermediate host to cross-sectional diameter greater than end diameter;

A plurality of U-shaped rolling element bracing frames, each bracing frame all has two lugs, is used for the back shaft of back-up roller kinetoplast, and like this, the intermediate host of rolling element is supported between lug, and conical end is then supported in the outside of lug.

Described U-shaped rolling element bracing frame designs for cooperating the bracing frame slotted eye, and purpose is in order to guarantee that U-shaped rolling element bracing frame can slide into bracing frame slotted eye the inside along the direction that is parallel to wheel bone axis.

The present invention is simple in structure, and is easy to operate, and when walking aid travelled on the level land or only need to cross the little barrier of threshold and so on, the front-wheel of walking aid played a supportive role to the walking aid support body.When walking aid ran into kerb equal altitudes barrier as the curbside, the forward movement of front-wheel was hindered, and is forced to stop.Because front-wheel is connected on the walking aid support body by a front-wheel retainer, so front-wheel can move with respect to support body.When user promoted walking aid forward, front-wheel moved backward with respect to the walking aid support body, and line direction changes the back into to direction in the past.Like this, when front-wheel touches the height barrier, in fact can't really stop the forward movement of walking aid, walking aid is able to success and climbs up barrier.

When front-wheel is forced to leave lower position when moving ahead, and move on to the back to the higher position time, the front end of walking aid support body descends, and touches the upper surface of barrier up to the supporting construction that moves ahead.At this moment, the unit of being responsible for support walking aid support body no longer is the front-wheel that also is positioned on the original ground, but is positioned at the lip-deep supporting construction that moves ahead of barrier.Walking aid still keeps stable and the state upwards of being kept upright, thus the body weight that can bear user.The effective wheel base that does not reduce simultaneously front and back wheel from.

When front-wheel is in the back during to the position, the walking aid support body by the front-wheel support bar with front-wheel to the direction of travel tractive.The pull strength that wheel is pulled to the barrier top that is applied on the wheel by the front-wheel support bar decomposites a component that makes progress, and is used for lifting front-wheel.Therefore, user only need promote walking aid forward, just can easily front-wheel be pulled to kerb and get on.The design of this walking aid comprises a gigback, and front-wheel can be returned to the original low level that moves ahead by gigback.Gigback preferably adopts the mode of spring to impel front-wheel to turn back to preceding line direction, guarantees that this return action can almost finish automatically.

In sum, this invention provides a convenient safe walking aid for climbing up and over the barrier with certain altitude, has increased the comfort level of user, and has reduced the risk of falling down.

Description of drawings

Fig. 1 is the 3 D stereo sketch map of this utility model;

Fig. 2-Fig. 6 climbs up and over the continuous position of walking aid in climbing barrier thing process for obstacle shown in Figure 1 and changes, and each position all shows with a graphics and a side view respectively;

Figure 7 shows that the local enlarged diagram of leading portion of the present utility model, front-wheel is in the low level that moves ahead among this figure;

Figure 8 shows that the local enlarged diagram of leading portion of the present utility model, front-wheel is in the back to a high position among this figure;

The continuous position that Fig. 9-Figure 11 shows that this utility model is folded up this process of storage state changes sketch map;

Figure 12 shows that universal wheel assembly drawing of the present utility model;

Figure 13 shows that some parts of universal wheel of the present utility model.

The specific embodiment

For further understanding content of the present invention and highlighting advantage of the present invention, now be elaborated as follows with the specific embodiment:

Walking aid 1 shown in Figure 1 is an enforcement example according to this invention.This walking aid comprises a support body 2, and support body 2 is made up of leading portion 3 and back segment 4.On the back segment 4 of support body 2 handle 5 has been installed, therefore, user can hold up hand propelled walking aid 1 on bearing surface 7 forward the walking, preceding line direction such as arrow 6 sign.

In addition, the support body back segment 4 of walking aid 1 also adopts two trailing wheels 10, for the walking aid of walking on bearing surface 7 provides support.Be separated from each other between two trailing wheels 10, thereby make disabled in use, may stand in or both feet are placed between the two-wheeled.

The walking aid of this invention must have a front-wheel at least, is positioned at support body the place ahead.By way of example, walking aid can have two trailing wheels and one to be positioned at intermediary front-wheel.Walking aid in this enforcement example preferably adopts two front-wheels 8, can increase the stability of walking aid 1 climbing barrier thing.

According to this invention, the walking aid front-wheel is connected on the support body by the front-wheel retainer.The front-wheel retainer is supporting the weight of front-wheel, so that front-wheel can move between a high position in move ahead low level and back with respect to support body; Front-wheel is positioned at and supports the support body that is positioned on the walking road surface when moving ahead low level.Shown in this enforcement example, the front-wheel retainer is the support arm 9 of an inverse-U-shape rack type, be installed on the support body 2 by retainer centring point 13, support the weight of two front-wheels 8, like this, front-wheel just can move ahead low level and back between a high position along an arcual path movement, front-wheel is in when moving ahead low level, supports the support body 2 be positioned on the walking road surface 7; Be in the back when a high position, walking aid is being climbed up and over the height barrier.In Fig. 1, the front-wheel 8 of walking aid 1 is in the low level that moves ahead.

In the embodiment of one of selection scheme, the front-wheel retainer can also adopt modes such as linked system or guidance system, by some rational slotted eyes designs, for providing to move, supports on the front-wheel wheel shaft, so that front-wheel moves around between a high position in move ahead relatively low level and the back of support body.

The walking aid of this invention comprises that also is installed in the forward support unit that temporarily moves ahead of support body (must have at least), and when front-wheel was in the back to a high position, this support unit that temporarily moves ahead can provide support to the support body that is positioned on the walking road surface; When the support unit that temporarily moves ahead is connected on the support body, needs and to guarantee,, must maintain a certain distance between the bottom of interim support unit and the walking road surface when the walking aid support body is when being provided support by the front-wheel that is positioned at the low level that moves ahead.

As shown in the figure, walking aid 1 has two wheels as the support unit 11 that moves ahead temporarily.Support unit can have multiple different choice, both can adopt shapes such as sphere or slide block, and also can make to provide sliding support or rotatably supported other arbitrary shapes or form to the walking aid support body that is positioned on the walking road surface.

Must be noted that for ease of the clearer this invention of explaining clearly the walking aid in the diagram has carried out simplifying to be handled.In actual applications, for instance, walking aid can be installed parking brake, trailing wheel and/or front-wheel is braked, and be equipped with a stayed surface, obtains above user can be sitting in having a rest.Stayed surface then can adopt built-in, as adopts detachable basketry or the like, is connected on the support body of walking aid.

Fig. 2-shown in Figure 6 is that the walking aid among Fig. 1 is implemented the continuous position of example in climbing barrier thing process and changed sketch map.Coming out with the 3D perspective representation respectively in walking aid each position when climbing up and over, and is aided with a side view, this shows the position relation of walking aid and barrier in the whole process.

Under normal operating position, when walking aid by a quite smooth supporting surface or when overcoming the lower barrier of height as threshold and so on, the front-wheel of walking aid is in the low level that moves ahead.Support to the walking aid support body is finished jointly by the front-wheel and the trailing wheel that are positioned on the walking road surface.When walking aid runs into higher barrier, the kerb on the curbside for example, the forward movement of front-wheel is hindered.At this moment, the position of walking aid as shown in Figure 2.

When walking aid ran into kerb, the direction pressure forward that the walking aid user is applied on the walking aid was reacted on front-wheel by kerb, thereby had become direction pressure backward.Under the effect of this power, front-wheel moves backward with respect to the walking aid support body, and the back is transferred on a high position, as shown in Figure 3 from the low level that moves ahead in its position.Therefore, though front-wheel has been subjected to obstruction, in fact do not hinder walking aid to continue to move forward, thereby make walking aid can successfully climb up and over kerb.

Along with the walking aid support body moves forward, the support unit that temporarily moves ahead (must have at least) is pulled to the top of barrier, as Fig. 2-shown in Figure 4.In position shown in Figure 2, the structure of supporting frame weight is a front-wheel.Because next, front-wheel will leave the low level that moves ahead, and moves to a high position backward with respect to support body, and front-wheel just no longer plays a supportive role to the walking aid support body is anterior.The support body front portion loses the support of front-wheel, and the position reduces, and up to the support unit that moves ahead, also is support wheel in the present embodiment, touches the upper surface of barrier, as shown in Figure 1.

In this position, what support retainer no longer is front-wheel on the plane, but is positioned at the lip-deep support unit of barrier.This just guarantees that walking aid can continue to move forward to stablize erect posture, thus the body weight of bearing user.

Implement in example this typical case, the support unit that temporarily moves ahead is installed in than the front-wheel position of front more also that is in when moving ahead low level.Adopt this design, when front-wheel leaves when moving ahead low level, the support unit that moves ahead just has been positioned at the barrier top.Therefore, the support unit that moves ahead only need move down slightly even need not to move and just can touch barrier, thereby the walking aid support body is played a supporting role, and simultaneously, the center of gravity of support body only to direction of travel minimum skew has taken place.Moreover, this design has also significantly reduced to finish from front-wheel and has left the low level that moves ahead to moving ahead support unit this needed time of support unit transformation process of supporting frame again.

In the ideal case, support unit and the walking aid vertical dimension between the road surface of being walked before the climbing barrier thing that moves ahead preferably just in time equals the height of barrier.Because the feasible support unit that moves ahead of this height can slide into above the barrier naturally, and provide support just at once the walking aid support body.As if owing to can not all kerbs all be a variety of causes such as equal height, this idea may realize never but in actual applications.

In view of this factor, advise that above-mentioned vertical dimension need preferably to equal the average height of climbing barrier thing, for example, the average height of kerb is 15 centimetres.If the obstacle height that actual needs is climbed up and over is less than 15 cm distance that move ahead between support unit and the road surface, walking aid is when climbing up and over kerb so, and its support body can turn forward slightly; If the obstacle height that actual needs is climbed up and over is greater than 15 cm distance that move ahead between support and the road surface, walking aid support body in the climbing barrier thing will recede slightly so.

Best, the support unit that moves ahead can adopt curved surface or make colyliform, thereby is convenient to the surface that walking aid slips over barrier.And, when the height of barrier a little more than between pilot unit (support unit moves ahead temporarily) and the walking road surface apart from the time, adopt the support unit that moves ahead of curved surface or band angled surface also to make the climbing barrier thing become easier.

Implement in the example the typical case, the bottom of interim support unit (must have at least, hereinafter will de-emphasize) and the distance that supports between the road surface are at least 10 centimetres, between 10 centimetres to 20 centimetres, are the best with 15 centimetres preferably.Moving ahead keeps such distance between support unit and the support road surface, just can successfully deal with most of barriers basically.

In the example of even more idealization, this support unit that temporarily moves ahead preferably can be adjusted its position with respect to the support body of walking aid, thereby make this support unit that moves ahead, just its bottom or its contact surface that contact with barrier surface, and the distance between the normal road surface of support walking aid can be adjusted variation when normal use.Like this, just can most of barriers have been overcome by adjusting above-mentioned distance.For example, when walking aid need be climbed up and over higher or lower relatively barrier usually, this distance can be adjusted to the height that equals these barriers, thereby reduce the gradient of walking aid support body in the obstacle detouring process as far as possible.

When the walking aid support body moved on on the kerb, as Fig. 3-shown in Figure 4, front-wheel moved to the back to the position.In this exemplary embodiments, front-wheel 8 is connected on the support body 2 by support 9, and support 9 is to take the mode of pivotal mounting to be connected on the support body.When front-wheel is in the back during to a high position, front-wheel is by support 9 tractive forwards.By tractive the mode that wheel is drawn on the kerb with respect to being shifted onto on the kerb, wheel to be more prone to.When user when direction of travel promotes the walking aid support body forward, act on a power above the barrier that wheel is drawn on the wheel by support arm, can decomposite the component of a vertical direction, impel wheel to move up.Therefore, user only need promote walking aid forward, and front-wheel just can be drawn on the kerb, thereby need not to make or have much ado.

In the time of above front-wheel moves to barrier, the effect by gigback just can turn back to the low level that moves ahead with front-wheel.Shown in the enforcement example in, gigback 12 has adopted spring mode, impels front-wheel to be returned to the low level that moves ahead.Spring shown in the figure is the vapour-pressure type spring, is made up of a compression cylinder and a piston rod, and an end of piston rod is connected on the support body 2, and the other end then is connected on the support 9.When front-wheel moved to the back to a high position, the vapour-pressure type spring was subjected to the compression of support and support body.Accumulative pressure just can be used for front-wheel is turned back to the low level that moves ahead in cylinder.If accumulate in spring inner enough pressure is arranged, user does not just need expressly the walking aid support body to be receded so, thereby front-wheel is turned back on the low level that moves ahead.In this case, user only need reduce to be applied to the downward active force on the support body, for example, reduces the dependence of health to walking aid, and like this, the front portion of walking aid support body is just raised, thereby spring element just can impel wheel to turn back to the low level that moves ahead.By this method, user just can have been held up handle always when the climbing barrier thing.

Return with the connection of mechanism's medi-spring and also can take other modes.The indispensable element spring of gigback also can be connected to other positions of front-wheel wheel shaft and support body.And spring both can use helical spring, and spring one end is connected on the retainer that supports front-wheel, and the other end then is connected to the support body back segment, and by this connected mode, when front-wheel breaks away from original moving ahead during low level, spring just is compressed; Can certainly adopt torque spring, by centring point on the front-wheel retainer and the coaxial installation of retainer, an end is connected on the front-wheel retainer, and the other end then is connected on the walking aid support body.

In addition, gigback can also adopt the form of hand-operated lever mechanism, and user is manually finished the playback of front-wheel by oneself operation.

By this form, user can select front-wheel is turned back to a high position from the back time of the low level that moves ahead according to actual needs.

For example, when trailing wheel was conflicted barrier, as shown in Figure 5, behind the barrier, the back segment with walking aid lifted user a little earlier, and then trailing wheel is moved to above the barrier, allows gigback that front-wheel is reset to the low level that moves ahead at last again on climbing up and over.As shown in Figure 6, the walking aid support body of climbing up and over barrier is subjected to being positioned at the together support of the front and back wheel on the road surface that the upper surface by barrier newly constitutes again.Therefore walking aid whole near and the process of climbing barrier thing in constantly provide support auxiliary.

In addition, when trailing wheel was conflicted barrier, the walking aid user also can be selected to allow gigback that front-wheel is reset to the low level that moves ahead earlier, then the support body back segment is raised on the barrier together with trailing wheel, and oneself also climbs up and over barrier at last.In this way, the user both hands need not to leave handle and just can successfully climb up and over barrier.

Also can arrive as shown in Figure 6 position by other method.Therefore, user just can have been climbed up and over barrier freely by walking aid.And, since adopt to climb up and over mechanism design very simple, this invention provides effective scheme for low-cost production.Generally speaking, the walking aid that this invention provides can help disabled to climb up and over the height barrier easily, improves comfort, and reduces the risk of falling down.

Fig. 7 and shown in Figure 8 be the leading portion partial enlarged drawing of the enforcement example walking aid of this invention.Wherein, the front-wheel 51 among Fig. 7 is in the low level that moves ahead, and the front-wheel 51 among Fig. 8 is in the back to a high position.

Fig. 7 and Fig. 8 have all only embodied the profile to the leading portion part 50 of support body.Move ahead a support unit and a linking arm 56 are arranged on the support body 50, and the support unit that moves ahead in this enforcement example adopts the form of support wheel 55, and support wheel 55 and linking arm 56 are connected on the front-wheel retainer 52 that supports front-wheel 51 by the centring point 53 of retainer.Gigback is made up of a spring element 54, and the one end is connected on the front-wheel retainer 52, and the other end then is connected on the support body leading portion 50 of walking aid.

When front-wheel 51 is in when moving ahead low level, spring 54 is in or contiguous extended state, preferably can provide a point pressure for the front-wheel that support is positioned at the low level that moves ahead.

As shown in Figure 7, front-wheel is in the low level that moves ahead, and at this moment wheel shaft 60 positions of front-wheel 51 are positioned at the front of a vertical line 57, and this vertical line is by the centring point 53 of support and connection arm 56 or front-wheel retainer 52.Here can adopt abutment (not showing in the drawings), prevent that arm shape retainer 52 from rotating (are clockwise directions with respect to centring point 53) forward.Therefore, when front-wheel 51 is positioned at moving ahead during low level as shown in the figure, if support body is subjected to the active force on the vertical direction, for example, user rests on health on the walking aid, by abutment front-wheel can't be rotated around centring point, to such an extent as to leave the low level that moves ahead.

When walking aid was walked forward, 58 pairs of front-wheels 51 of kerb apply an active force, and were as shown in arrow 59.When this power reaches a certain size, will push away the low level that moves ahead to front-wheel 51; When front-wheel retainer 52 passed through perpendicular elements 57, this masterpiece was used for support body leading portion 50, and it is slightly upwards lifted.

As shown in Figure 8 be the walking aid leading portion, at this moment, the position of its front-wheel 51 on kerb 58, be in the back to a high position.On this position, spring element 54 is in compressive state, and front-wheel retainer 52 is had an active force, impels front-wheel 51 to move on the low level that moves ahead.The amount of force of spring can guarantee that preferably user does not need walking aid is applied any active force downwards, and wheel just can be got back on the position that moves ahead in automatic rotation under the effect of gigback.Therefore, the walking aid user only need reduce to be applied to the power that is directed downwards on the handle, just wheel can be turned back on the preceding line position.

Implement in the diagram of example this typical case, (walking aid of this invention must have a front-wheel to front-wheel at least, hereinafter will de-emphasize) retainer 52 adopts pivotally connected mode to be connected on the walking aid support body by retainer centring point 53, so, front-wheel 51 just can move around along an arcual route between a high position in move ahead low level and back.

During line position, its wheel shaft 60 is positioned at the front by the vertical line 57 of retainer centring point 53 before front-wheel 51 is positioned at; When front-wheel 51 was in the back to a high position, wheel shaft 60 was located in the back of this vertical line 57.Therefore, front-wheel 51 in the past line position move on to the back in the process of position, front-wheel retainer 52 positions just and the vertical line 57 by centring point overlap, thereby centring point is upwards lifted.And when walking aid is walked forward, as long as front-wheel is subjected to a very little active force, the situation of line position before will causing breaking away from.Overcome this point and allow wheel shaft pass through vertical line, just require user that support body is applied direction active force forward in addition, perhaps also can reduce to be applied to the downward power on the support body, thereby produce one " threshold ", stop front-wheel to break away from preceding line position.Therefore, when walking aid runs into comparatively coarse surface, for example: carpet or doormat etc. just can prevent that by this method front-wheel from the danger of preceding line position taking place to break away from.

Equally, when the front-wheel of walking aid is positioned at preceding line position, and the front-wheel wheel shaft is when being positioned at vertical line front by front-wheel retainer centring point, if the walking aid support body is applied a power vertically downward, just can force front-wheel to be moved back into preceding line position, thereby support body is played a supportive role.

The current wheel is positioned at when moving ahead the position, front-wheel wheel shaft and by preferably only keeping a bit very short distance between the vertical line of centring point, so user only need tilt the support body of walking aid a little, just can be with front-wheel after line position move in the past to the position.

In other embodiment, all right bolt mechanism of design and installation of walking aid, user can be locked in front-wheel on the preceding line position by operating this bolt mechanism.When the locking of this bolt mechanism is disengaged, front-wheel just can the pro-line position and the back between the position, move around.

On line position before front-wheel is locked in, just can prevent where necessary that front-wheel from moving to the back on the position.For example, when user promotes walking aid forward and walks on the rough surface of gravel road and so on or landform, perhaps when barriers such as kerb get off.

The support unit that moves ahead preferably is installed in the position of front-wheel front, and parallel with front-wheel.Like this, when front-wheel was conflicted barrier, the support unit that moves ahead just had been positioned at the barrier top.According to the distance that moves ahead between support unit and the walking ground, support unit may contact with the barrier surface or only need reduce certain distance a little and just can contact with the barrier surface, thereby support body is played a supporting role.And support body is subjected to the position of support unit supports and front-wheel and is in support body is supported when moving ahead low level position in alignment or approaching substantially mutually.Because walking aid is subjected to continuously supporting, therefore increased the stability of walking aid when the climbing barrier thing.

The support body preferred design of walking aid becomes an inverted V-shaped frame structure that Open Side Down, with reference to the walking aid side view, form by at least one foreleg and two back legs, should leave a segment distance between two back legs, in the middle of user may stand in, grip the handle that is installed in inverted V-shaped support body top.In a further embodiment, support body can be the two frame structures of inverted V-shaped, be made up of two forelegs and two back legs altogether, and the purpose of two forelegs is intended to further improve the stability of walking aid.

The support body preferred design of walking aid becomes Foldable type, launches to be user mode, folds up the storage state that is.As Fig. 9-shown in Figure 11, the enforcement example of walking aid in this invention, expression to be support body fold into the continuous variation of main positions the storage state procedure from deployed condition.The two frame structures of inverted V-shaped have designed a hinge mechanism, and the foreleg of walking aid and back leg draw in hinge mechanism, fold up thereby make back leg can head on the support body foreleg.Shown in this exemplary embodiments, when support body was in the storage state of packing up, the back leg of walking aid made the center of gravity of walking aid be positioned in the middle of the wheel with respect to the position of foreleg, and keeps the walking aid erect posture.Like this, when support body was in the storage state, what walking aid need occupy only was the wheel size, unusual conserve space, and can being placed on easily in the narrow and small storage space, or locate to have deposited along wall of porch etc.

The design of front-wheel retainer is best compact succinct, and for example, the length of linking arm is a little short, and the distance between centring point and the wheel shaft is substantially equal to the radius length of wheel.The use of compact front-wheel retainer can make whole walking aid look more succinct, also can fold up simultaneously to leave in the compact limited storage space.The length that distance between centring point and the front-wheel wheel shaft preferably is a bit larger tham the front-wheel radius.

In this enforcement example, relative position between front-wheel wheel shaft and the walking aid support body is basic fixed always.In ideal embodiment, front-wheel preferably adopts universal wheel.Universal wheel is also referred to as omnidirectional wheel usually, be a kind of can be to the wheel of any direction walking.Coating some video disc shapes or columned minor structure around this wheel, vertical mutually with the rotating direction of wheel.Adopt this design to be intended to guarantee that wheel can roll on the one hand with all strength, still can very finish broadside freely but then.

The employing of universal wheel has been removed front-wheel from and has been equipped with necessity of deflecting roller in addition, but gives this walking aid more flexibility simultaneously.Because universal wheel allows walking aid one edge straight line moving, carry out front-wheel pro-line position on one side and the back moves around between the position, therefore adopt universal wheel be convenient to very much to adjust front-wheel and the height barrier that need climb up and between the position concern.

The preceding wheel diameter of walking aid is preferably between 20 centimetres to 30 centimetres, is the best with 25 centimetres.Adopt this size to be convenient to walking aid and climb up and over the barrier of height, for example threshold etc. less than wheel footpath.

As another aspect of this invention, the front-wheel of walking aid adopts universal wheel 100, is made up of a centre wheel bone 101 that is positioned at the front end centre position, around the front-wheel main axis rotation.A plurality of bracing frame slotted eyes 102 are contained in wheel bone 101 the insides, are used to connect U-shaped rolling element bracing frame 103, along the outer ring distribution of wheel bone, for rolling element provides support.The explosive view of universal wheel as shown in figure 12.Be installed to the state on the walking aid as Fig. 1-universal wheel black box shown in Figure 6, shown in Figure 13 is some parts of universal wheel.

The bracing frame slotted eye distributes along the outer ring of wheel bone, be used for supporting be evenly distributed on the one side of crossing main shaft with the wheel bone center hub be one group of rolling element of radiation profile and be evenly distributed on the another side that crosses main shaft with the wheel bone center hub be radiation profile another the group rolling element.From side view, can see, each rolling element of first group of rolling element overlaps with the rolling element of each adjacent diagonal position of second group respectively, guarantee wheel under any circumstance, can both effectively contact with ground by the intermediate host part of at least one rolling element.

Each U-shaped rolling element bracing frame 103 is made up of two lugs that are parallel to each other 104 respectively, i.e. the two legs of U-shaped bracing frame 103.An opening is respectively arranged above the lug 104, be used for back-up roller kinetoplast back shaft 106.Interconnect by an intermediate frame part 105 between two lugs.The shape of intermediate frame part is the bracing frame slotted eye 102 of match wheel bone 101 and design, by this design, inside U-shaped rolling element bracing frame 103 just can slide into the bracing frame slotted eye along the direction that is parallel to wheel bone axis.In addition, perhaps as another kind of selection scheme, also can bracing frame be fixed in the bracing frame slotted eye by using fastening methods such as screw.Each rolling element 107 all is made up of an intermediate host 108 and two conical end that are separated from each other 109, and the intermediary side cross-sectional diameter of intermediate host 108 is greater than end diameter.Under installment state, the intermediate host of rolling element is supported on two lugs 104 and between two conical end 109 of lug outer end.These three rolling element parts interconnect by the rolling element back shaft (106) of two lugs picking-ups of a velamen U-shaped rolling element bracing frame.

Walking aid is preferably installed one or more guard shields 110, is used for to providing protection to small part wheel carrier and/or part roll body.

Bracing frame slotted eye and front-wheel wheel bone can make up by different ways.For example, can connect or adopt advanced metal working process that they are carried out machined by the casting mode and connect according to standard technology.The wheel bone can mix the various hardware of employing and plastic components is made, and just can form the wheel bone as long as pass through connection in order mutually.For example, central hub can adopt metals such as cast iron, aluminum or rustless steel to make, and support section then can adopt the plastic components manufacturing.Wheel bone and bracing frame slotted eye can adopt one or more plastic materials to constitute an integral body, also can constitute the monolithic wheel bone by connected mode.Generally speaking, be raw material preferably with suitable plastic material, will take turns bone and organic whole of bracing frame slotted eye formation by the processing mode of injection moulding.

Because rolling element is supported in the U-shaped rolling element bracing frame that designs for the bracing frame slotted eye on the match wheel bone, therefore, as long as just rolling element can be installed on the wheel bone by very simple mode.In addition,, only bracing frame need be taken off, just can change rolling element if the situation of damage or wearing and tearing appears in rolling element, simple to operation.

This invention is not limited only to the listed enforcement example of enumerating in the presents, but comprise the various transformations in claim, carried out of with good grounds this invention.

Claims (9)

1, a kind of barrier is climbed up and over walking aid, comprise front frame body, back frame body, two trailing wheels are located at the back frame body lower end, at least one front-wheel, it is characterized in that also including a front-wheel retainer, be connected on the walking aid front frame body, detachable, connect front-wheel and provide support for it, at least one support unit that temporarily moves ahead, be positioned at the front frame body leading portion, the current wheel is positioned at the back when a high position, and the support unit that temporarily moves ahead is that the lip-deep support body of barrier provides support, the current wheel is positioned at when moving ahead the position, between this interim support unit and the walking road surface certain distance arranged.

2, barrier according to claim 1 is climbed up and over walking aid, it is characterized in that described front-wheel adopts pivotally connected mode to be connected on the front frame body by a retainer centring point, front-wheel can be moved around along an arcual route between a high position in move ahead low level and back.

3, barrier according to claim 2 is climbed up and over walking aid, it is characterized in that being in when moving ahead low level when described front-wheel, and the wheel shaft of its front-wheel is positioned at the vertical line front of retainer centring point, and current the wheel is positioned at the back when a high position, and the wheel shaft of front-wheel is positioned at the back of this vertical line.

4, climb up and over walking aid according to claim 1 or 2 or 3 described barriers, it is characterized in that described obstacle climbs up and over the front-wheel of walking aid and be in when moving ahead low level, the support unit that temporarily moves ahead is positioned at the top of front-wheel, and when front-wheel was in the back to a high position, the support unit that temporarily moves ahead was positioned at the place ahead of front-wheel.

5, barrier according to claim 4 is climbed up and over walking aid, it is characterized in that described obstacle climb up and over walking aid also be provided with the locking front-wheel bolt mechanism.

6, barrier according to claim 5 is climbed up and over walking aid, it is characterized in that also being provided with a gigback and impels front-wheel to be returned on the preceding line position, and this gigback comprises a spring structure.

7, barrier according to claim 6 is climbed up and over walking aid, it is characterized in that current the wheel is positioned at when moving ahead low level, distance between its interim support unit bottom and the walking road surface must not be less than 10 centimetres, the position of its interim support unit is that support body is regulated relatively, and is parallel with front-wheel when being in when moving ahead low level interim support unit.

8, climb up and over walking aid according to claim 1 or 2 or 3 described barriers, it is characterized in that described front-wheel can be universal wheel, the formation of described universal wheel comprises:

A center wheel bone can center on a main axis rotation, contains a plurality of bracing frame slotted hole structures on the wheel bone, and the purpose of design of bracing frame slotted eye is intended to connect the rolling element bracing frame, thereby for providing supporting along the rolling element of taking turns the distribution of bone outer rim;

A plurality of rolling elements are installed to the bolster that is connected rolling element main body and two ends on the lug and form with one by an intermediate host, two isolating conical end in the left and right sides respectively, the center side of intermediate host to cross-sectional diameter greater than end diameter;

A plurality of U-shaped rolling element bracing frames, each bracing frame all has two lugs, is used for the bolster of back-up roller kinetoplast, and like this, the intermediate host of rolling element is supported between lug, and conical end is then supported in the outside of lug.

9, barrier according to claim 8 is climbed up and over walking aid, it is characterized in that U-shaped rolling element bracing frame cooperates the bracing frame slotted eye, can slide into bracing frame slotted eye the inside along the direction that is parallel to wheel bone axis in order to guarantee U-shaped rolling element bracing frame.

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