CN213157124U - Locking mechanism and folding seat and folding wheelchair using same - Google Patents

Abstract

The utility model provides a locking mechanism and utilize this locking mechanism's folding seat chair and folding wheelchair, locking mechanism unblock and locking only need same power supply, folding seat chair and folding wheelchair unblock and folding and open and lock all only need same drive power, have the advantage such as design exquisiteness, simple structure, the utility model discloses a locking mechanism, including mounting and scalable member, two mounting holes about having on the mounting; the telescopic rod piece comprises a central rod and 2 telescopic rods arranged at two ends of the central rod, the telescopic rods can move along the length direction of the central rod, an elastic piece is arranged between the 2 telescopic rods, locking pins are arranged at the opposite ends of the 2 telescopic rods, a sleeve is connected onto the central rod piece, pushing pieces are connected with two ends of the sleeve, the pushing pieces are sleeved outside the two locking pins, and the pushing pieces are V-shaped or trapezoidal.

Description

Locking mechanism and folding seat and folding wheelchair using same

Technical Field

The utility model discloses locking mechanical system especially relates to a locking mechanical system that only needs same driving source can unblock and locking.

Background

The utility model discloses a utility model patent of application number 2020107924913, the name is a novel collapsible wheelchair provides a novel collapsible wheelchair, but it only provides the folding mode of wheelchair, and does not restrict the locking mechanical system of folding wheelchair, consequently the utility model provides a locking mechanical system can be used for this folding wheelchair's locking and unblock, also can be used for other folding mechanical system's unblock and locking.

Disclosure of Invention

The utility model aims at providing a locking mechanism which can be used for unlocking and locking a folding mechanism, wherein the unlocking and locking of the locking mechanism only need the same power source and has the advantages of exquisite design, simple structure and the like; the telescopic rod piece comprises a central rod and 2 telescopic rods arranged at two ends of the central rod, the telescopic rods can move along the length direction of the central rod, an elastic piece is arranged between the 2 telescopic rods, lock pins are arranged at the end parts of the 2 telescopic rods, a sleeve is connected onto the central rod piece, pushing pieces are connected to two ends of the sleeve, the pushing pieces are sleeved outside the two lock pins, and the pushing pieces are V-shaped or trapezoidal.

In the technical scheme, the pushing member can transversely move along the central rod only by pulling the sleeve, the pushing members at two ends of the sleeve are V-shaped or trapezoidal, the distance of the pushing member on the central rod can be changed along with the transverse movement of the pushing member on the central rod, the pushing member is sleeved outside the 2 lock pins, so that the two lock pins can be changed along with the change of the distance of the pushing member on the central rod, when the distance of the pushing member on the central rod is shortened, the distance between the two lock pins is shortened, the elastic member is compressed, the 2 shrinkage rods inwards shrink along the central rod to be separated from the mounting holes of the fixing members, the locking mechanism is unlocked, when the distance of the pushing member on the central rod is lengthened, the two lock pins drive the 2 shrinkage rods to outwards move under the elastic force of the elastic member until the shrinkage rods stretch into the mounting holes, the locking mechanism locks again.

Preferably, the device further comprises a driving device, wherein the driving device comprises a telescopic push rod, and the sleeve is connected to the tail end of the push rod.

In the technical scheme, the telescopic push rod of the driving device is used for pushing and pulling the sleeve, and the distance of the pushing piece on the central rod is changed, so that the unlocking and the locking of the locking mechanism are realized, and the unlocking and the locking of the locking mechanism only need the same power source.

Preferably, the elastic member is a spring.

The utility model also provides a folding mechanism with aforementioned locking mechanical system, folding mechanism includes folded piece and folding support, folding support one end is articulated with the fixed end, the other end with the folded piece is articulated, the bracing piece group includes first bracing piece and second bracing piece, the bracing piece group with locking mechanical system links to each other.

In the technical scheme, the folding piece, the folding bracket and the fixed end form a four-bar linkage mechanism, the locking mechanism is connected with the supporting rod group, and the folding mechanism is folded, unlocked, opened and locked only by the same driving force.

Preferably, the telescopic rod of the locking mechanism is installed in the folding member, and the first support rod or the second support rod is provided with an extension end hinged to the telescopic rod.

In this technical scheme, through extension end and scalable member articulated, can increase folding mechanism's stability.

The utility model provides a be equipped with locking mechanical system's folding seat chair, folding seat chair includes bottom frame, seat frame and folding support, folding support includes first bracing piece and second bracing piece, first bracing piece with the second bracing piece articulate in bottom frame with between the seat frame, the quantity of mounting be 2 and install in both ends about the seat frame, locking mechanical system install in the seat frame lower part just scalable member install in between 2 mountings.

In the technical scheme, the locking mechanism is applied to the folding seat, so that the folding, unlocking, opening and locking of the seat can be realized by only using the same power source, the mechanical structure can be greatly reduced, and the product competitiveness is increased.

Preferably, an extending end is arranged on the first supporting rod or the second supporting rod, and the extending end is hinged to the telescopic rod piece.

In this solution, the stability of the seat can be increased by fitting the locking mechanism and the extension end together.

Preferably, the folding seat further comprises a seat back, a third support rod and a fourth support rod, the seat back is hinged to the seat frame, one end of the third support rod is hinged to the telescopic rod piece, the other end of the third support rod is hinged to the fourth support rod, and the fourth support rod is fixedly connected with the seat back.

In this technical scheme, can realize that seat and back of the chair once fold and a key are folded, the folding and the unblock of whole product and open and the locking all only need same power supply, design benefit, simple to use.

Preferably, the folding seat further comprises an elastic damping member, the elastic damping member is installed between the seat frame and the central rod, the elastic damping member is in a stretching state, and the pulling force of the elastic damping member counteracts the gravity when the folding seat is folded.

This technical scheme has optimized the product, prevents that the seat from appearing the card pause and the phenomenon of suddenly falling downwards when folding.

The utility model discloses still provide one kind and be equipped with folding seat's folding wheelchair, folding wheelchair still includes and removes the chassis, remove the chassis with folding seat connects.

This technical scheme provides a new locking form for folding wheelchair, can realize once folding and the key formula of wheelchair folding, and the folding and the unblock and the opening and the locking of wheelchair all only need same power supply.

The utility model provides a pair of locking mechanical system and utilize this locking mechanical system's folding seat chair and folding wheelchair can bring following at least one kind of beneficial effect:

1. the unlocking and locking of the locking mechanism of the utility model only need the same power source, and has the advantages of simple structure, ingenious design and the like;

2. the utility model relates to a folding mechanism, folding seat chair and folding wheelchair folding and unblock and open and the locking all utilize same power supply, have advantages such as simple structure, design benefit, low cost.

Drawings

The above features, technical characteristics, advantages and modes of realisation of the new collapsible wheelchair will be further explained in the following, in a clearly understandable manner, with reference to the accompanying drawings, which illustrate preferred embodiments.

Fig. 1 is a schematic structural diagram of a locking mechanism of the present invention.

Fig. 2 is a schematic side view of a locking mechanism according to the present invention.

Fig. 3 is a schematic perspective view of a locking mechanism of the present invention.

Fig. 4 is a schematic structural diagram of the locking mechanism of the present invention when unlocked.

Fig. 5 is a schematic perspective view of a foldable seat of the present invention.

Fig. 6 is a schematic side view of the foldable seat of the present invention.

Fig. 7 is a schematic side view of the folded seat of the present invention.

Fig. 8 is a schematic view illustrating the folding principle of the folding seat of the present invention.

Fig. 9 is a schematic view illustrating the folded seat of the present invention.

The reference numbers illustrate:

100. a locking mechanism; 200. folding the seat; 10, a fixing piece; 20. a telescopic rod;

40. a four-bar linkage; 50. a four-bar linkage; 60. a chair back;

12. mounting holes; 21. a center pole; 22. a retracting lever; 23. a lock pin; 24. a chute;

25. an elastic member; 26. a sleeve; 27. a pusher member; 33. a push rod; 34. a drive device;

35. a frame; 41. a bottom frame; b fixing piece; 43. a first support bar;

44. a second support bar; 45. seat frames; the extension end; 51. a third support bar;

53. a fourth support bar; and 54, bending the pipe.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure of the product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In this document, upper, lower, left, right, front and right refer to upper, lower, left, right, front and right of the described drawings, which do not fully represent actual circumstances.

In a first embodiment, the present invention relates to a locking mechanism 100, as shown in fig. 1-4, comprising a fixing member 10 and a retractable rod 20, the fixing member 10 has two left and right mounting holes 12, the retractable rod 20 is installed between the two mounting holes 12, when the locking mechanism 100 is locked, the retractable rod 20 is installed between the two mounting holes 12, and when the locking mechanism 100 is opened, the retractable rod 20 is separated from the mounting holes 12 and can move.

The retractable rod 20 comprises a central rod 21, 2 retractable rods 22, 2 locking pins 23, an elastic member 25, and a sliding groove 24, wherein the central rod 21 is a hollow rod structure, the 2 retractable rods 22 are installed in the central rod 21 and at the left and right ends of the central rod 21, the retractable rods 22 are movable along the length direction of the central rod 21, the elastic member 25 is installed in the middle of the central rod 21 and connected with the left and right 2 retractable rods 22, the end portions of the 2 retractable rods 22 are provided with the locking pins 23, the retractable rods 22 can move along the length direction of the central rod 21 by pulling the locking pins 23, the central rod 21 is further provided with the sliding groove 24, and the locking pins 23 can slide in the sliding groove 24.

The utility model relates to a locking mechanical system 100 still includes sleeve pipe 26 and impeller 27, sleeve pipe 26 overlaps in the middle of central rod 21, impeller 27 overlaps the outside at two lockpins 23, impeller 27 is V-arrangement or trapezoidal, promotes sleeve pipe 26 forward, then impeller 27 narrows in the distance on central rod 21, impeller 27 drives lockpin 23 along central rod 21 inward movement, 2 lockpins 23 drive 2 shrink poles 22 inward movement, elastic component 25 is in the compression state; the sleeve 26 is pulled back, the distance of the pushing member 27 on the central rod 21 is widened, the 2 contracting rods 22 move outwards under the elastic force of the elastic member 25, and the 2 locking pins 23 are also moved outwards.

Preferably, the pushing member 27 is symmetrical to the left and right about the sleeve 26.

When the locking mechanism 100 is locked, the 2 retractable rods 22 of the retractable rod 20 extend into the 2 mounting holes 12, and the retractable rod 20 is fixed.

When the locking mechanism 100 needs to be opened, the sleeve 26 is pushed forward, the pushing member 27 drives the contracting rod 22 to move inwards to be separated from the mounting hole 12 through the 2 locking pins 23, the telescopic rod 20 can move between the fixing members 10, and the elastic member 25 is in a compressed state.

When the locking mechanism 100 needs to be locked again, the pushing member 27 loses pressure on the lock pin 23 by pulling the sleeve 26 backwards, and when the sleeve 26 pulls the telescopic rod 20 to move to the mounting hole 12, the two ends of the telescopic rod 20 lose pressure, and the two telescopic rods 22 extend into the mounting hole 12 to be locked under the elastic force of the elastic member 25.

Preferably, the elastic member 25 of the present invention is made of a spring, and may be other elastic elements.

In the present embodiment, the driving sleeve 26 drives the contraction rod 22 to unlock, and the force of the driving sleeve 26 may be manual force or driving force of a driving device.

In the second embodiment, on the basis of the first embodiment, as shown in fig. 1 to 4, the locking mechanism 100 of the present invention further includes a driving device 34, the driving device 34 and the fixing member 10 are both mounted on a frame 35, the driving device 34 has a retractable push rod 33, the push rod 33 is connected to the sleeve 26, the push rod 33 is extended or shortened under the control of the driving device 34, and at the same time, the push member 27 is driven to move, so as to unlock and lock the locking mechanism 100.

The utility model discloses an unlocking and locking of locking mechanical system 100 all only need same power supply.

In concrete embodiment three, on the basis of concrete embodiment two, the utility model provides a folding mechanism with aforementioned locking mechanical system still, folding mechanism includes folded piece and folding support, folding support one end is articulated with the fixed end, the other end with the folded piece is articulated, the bracing piece group includes first bracing piece and second bracing piece, the bracing piece group with locking mechanical system links to each other.

The folding piece, the folding bracket and the fixed end form a four-bar linkage mechanism, the locking mechanism is connected with the supporting rod group, and the folding, unlocking and unlocking of the folding mechanism only need the same driving force.

Preferably, the telescopic rod of the locking mechanism is installed in the folding member, and the first support rod or the second support rod is provided with an extension end hinged to the telescopic rod.

Through extending the end and being articulated with scalable member, drive arrangement only needs the scalable member of drive to drive folding support is folding, so can increase folding mechanism's stability.

In a fourth embodiment, as shown in fig. 5-7, the locking mechanism 100 is used with a folding seat 200.

The folding seat 200 includes a bottom frame 41 and a seat frame 45, the B fixing members 42 are connected to left and right sides of the bottom frame 41, the fixing members 13 are connected to left and right sides of the seat frame 45, the locking mechanism 100 is installed between the seat frame 45 and the fixing members 13, and the telescopic rod 20 of the locking mechanism 100 can move and lock between the left and right fixing members 13.

The B fixing part 42 and the fixing part 13 are hinged to each other to form a first supporting rod 43 and a second supporting rod 44, the B fixing part 42, the fixing part 13, the first supporting rod 43 and the second supporting rod 44 form a four-bar linkage 40, the first supporting rod 43 and the second supporting rod 44 swing upwards to open the seat, and the first supporting rod 43 and the second supporting rod 44 swing downwards to fold the seat.

In particular, the B fixing member 42 and the fixing member 13, the first support bar 43 and the second support bar 44 form a four-bar linkage, the number of the B fixing member 42 and the fixing member 13, the number of the first support bar 43 and the number of the second support bar 44 are 2, one end of the second support bar 44 hinged to the seat frame 45 further has an extension end 47, and the 2 extension ends 47 are hinged to two ends of the central rod 21 of the telescopic rod member 20.

The first support bar 43 and the second support bar 44 constitute a folding bracket of the folding seat 200, and are also a main body bracket of the folding seat 200.

In this embodiment, when the foldable seat 200 is in the open state, the push rod 33 of the driving device 34 extends, the pushing member 27 moves forward, the lock pin 23 drives the retractable rod 22 to retract inward, the retractable rod 20 is separated from the fixing member 13, the locking mechanism 100 is unlocked, the push rod 33 extends continuously, the retractable rod 20 is driven to move continuously, the retractable rod 20 drives the first support rod 43 and the second support rod 44 to swing downward through the extension end 47, and the seat is folded, so that the present invention realizes that one driving force can complete the unlocking and folding of the foldable seat 200.

When folding seat 200 is in fold condition, push rod 33 of drive arrangement 34 shortens, sleeve 26 drives scalable member 20 rearward movement, drives first bracing piece 43 and second bracing piece 44 upswing through extending end 47, folding seat 200 opens this moment, sleeve 26 drives impeller 27 rearward movement simultaneously and loses the suppression to lockpin 23, shrink pole 22 is outside movement under the elastic force effect of elastic component 25, until 2 shrink poles 22 stretch into about mounting hole 12 of two mounting 13, folding seat 200 locks, consequently the utility model discloses a drive power can accomplish opening and locking of folding seat 200.

Meanwhile, the locking and unlocking of the locking mechanism 100 of the present invention only needs one power source, which is the driving device 34.

Preferably, the driving device 34 can be a push rod motor, a gas spring, and other braking components.

In a fifth embodiment, as shown in fig. 5-7, the foldable seat 200 further includes a seat back 60, a bent tube 54, a third support rod 51 and a fourth support rod 53, the seat back 60 is hinged to one end of the bent tube 54, the other end of the bent tube 54 is fixedly connected to the seat frame 45, one end of the third support rod 51 is hinged to the central member 21 of the telescopic rod 20, the other end of the third support rod 51 is hinged to the fourth support rod 53, the other end of the fourth support rod 53 is fixedly connected to the seat back, and the extension end 47, the third support rod 51, the fourth support rod 53 and the bent tube 54 form a four-bar linkage 50.

As shown in fig. 8-9, which are schematic diagrams illustrating the folding seat 200 according to the present invention, the four-bar linkage 40 and the four-bar linkage 50 are connected in series via the extension end 47 and the elbow 54, so that a driving force is applied to move the four-bar linkage 40 and the four-bar linkage 50 simultaneously, i.e. only one driving force is required to fold and unfold the seat frame 45 and the backrest 60 simultaneously.

And because the extension end 47 and the locking mechanism 100 are hinged together, the present invention achieves that only one driving force is needed to achieve the unlocking and folding as well as opening and locking of the folding seat 200 of the present invention. Can realize the utility model relates to a folding seat 200 once folds and a key is folding.

The specific motion principle is as follows:

when the utility model relates to a folding seat 200 is opened, during the shrink pole 22 both ends of scalable member 20 stretched into mounting hole 12 respectively, then four-bar linkage 40 was fixed as folding seat 200's main part support, and seat frame 45 and back of the chair 60 are the form of opening.

When the folding seat 200 of the present invention is folded, the push rod 33 of the driving device 34 extends, and drives the push member 27 to move forward through the sleeve 26, the push member 27 presses the lock pin 23 to drive the retractable rod 22 to retract inward, the locking mechanism 100 is unlocked, the push rod 33 extends continuously, and drives the retractable rod 20 to move continuously, the retractable rod 20 drives the first support rod 43 and the second support rod 44 to swing downward through the extension end 47, and then the seat frame 45 is folded; the second support rod 44 swings downward while the extending end 47 swings upward, driving the retractable rod 22 to swing upward, and pushing the fourth support rod 53 to swing forward through the third support rod 51, thereby pushing the chair back 60 to rotate forward around the rotation point 31 to fold the chair back 60, and at this time, the whole folding chair 200 is in a folded state.

Vice versa will be once more the utility model relates to a when folding seat 200 is opened, drive arrangement 34's push rod 33 shortens, and sleeve pipe 26 drives scalable member 20 rearward movement, drives first bracing piece 43 and second bracing piece 44 upswing through extending end 47, and folding seat 200 begins to open this moment, extend end 47 downstream, extend end 47 drives fourth bracing piece 53 rearward swing through third bracing piece 51, revolutes rotation point 31 rearward through driving the back of the chair and rotates the back of the chair 60 and open, and impeller 27 rearward movement simultaneously loses the suppression to lockpin 23, and shrink rod 22 outwards moves under the elastic force of elastic component 25, until 2 shrink rod 22 stretch into about two mounting hole 12 of mounting 13, folding seat 200 is the form of opening and is locked.

The utility model relates to a folding seat chair 200 only needs a drive power can realize the unblock of seat chair with folding or open and the locking, and the unblock also is same driving source with the locking application.

In concrete embodiment six, on concrete embodiment four basis, will the utility model relates to a folding seat chair 200 increases a removal chassis and can become a collapsible wheelchair, the utility model discloses do not do specifically to the form that removes the chassis and restrict, only need realize portable function can.

In the seventh embodiment, on the basis of the fourth embodiment, when the folding seat 200 is folded, the push rod 33 extends, since the sleeve 26 is forward, a certain distance exists between the central rod 21 and the sleeve 26, at this time, the folding seat 200 is folded downward, and under the influence of gravity, the folding seat 200 will fall downward until the central rod 21 hits the inner end of the sleeve 26, in order to solve this problem, an elastic damping member is added between the seat frame 45 and the central rod 21, the elastic damping member is in a stretching state, and the central rod 21 is always under a pulling force, and the pulling force can counteract the influence of gravity when the seat is folded.

To sum up, the utility model provides a pair of locking mechanical system only needs the action that same power supply can realize unblock and locking, the utility model provides an utilize this locking mechanical system's folding seat chair and folding wheelchair all have only to need a drive power can realize the unblock simultaneously and fold and open and lock two actions, and the unblock also is same with the driving source that the locking was exerted, consequently the utility model has the advantages of the design is exquisite, simple structure etc.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A locking mechanism comprises a fixing piece and a telescopic rod piece, wherein the fixing piece is provided with a left mounting hole and a right mounting hole; the telescopic rod piece is characterized by comprising a central rod and 2 telescopic rods arranged at two ends of the central rod, wherein the telescopic rods can move along the length direction of the central rod, an elastic piece is arranged between the 2 telescopic rods, lock pins are arranged at the ends of the 2 telescopic rods, a sleeve is connected onto the central rod piece, pushing pieces are connected with two ends of the sleeve, the pushing pieces are sleeved outside the two lock pins, and the pushing pieces are V-shaped or trapezoidal.

2. The locking mechanism of claim 1, further comprising a drive device, said drive device comprising a retractable push rod, said sleeve being attached to an end of said push rod.

3. A locking mechanism according to claim 2, wherein the resilient member is a spring.

4. A folding seat comprising the locking mechanism of any one of claims 1-3, further comprising a bottom frame, a seat frame, and a folding bracket comprising a first support bar and a second support bar hinged between the bottom frame and the seat frame, wherein the number of the fixing members is 2 and installed at both left and right ends of the seat frame, wherein the locking mechanism is installed at a lower portion of the seat frame and the retractable bar member is installed between the 2 fixing members.

5. A folding seat according to claim 4, wherein said first or second support bar is provided with an extension end, said extension end being hingedly connected to said telescopic bar.

6. A folding seat according to claim 5, further comprising a seat back, a third support bar and a fourth support bar, wherein said seat back is hinged to said seat frame, said third support bar is hinged at one end to said telescopic bar, said third support bar is hinged at the other end to said fourth support bar, and said fourth support bar is fixedly connected to said seat back.

7. A folding seat according to claim 6, further comprising an elastic damping member mounted between the seat frame and the center rod, the elastic damping member being in tension, the tension of the elastic damping member counteracting the force of gravity when the folding seat is folded.

8. A folding wheelchair provided with a folding seat as claimed in claim 7, further comprising a moving chassis connected to the folding seat.

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