TWI692426B - Multifunctional back type trolley - Google Patents

Abstract

A multifunctional back-type trolley, mainly composed of a carrier, a push handle, a tail plate, four wheel sets and a strap device, wherein the carrier has a front section and a first pivot mechanism and a front section group It is connected to the rear section, and the front section can be folded into each other through the first pivot mechanism and the rear section; the push handle is set on the rear section with two second pivot mechanisms, and the push handle can pivot the first pivot mechanism as the axis; the four-wheel group They are respectively pivotally arranged on the front section and the rear section; the strap device is connected with the push handle, and the other side of the back plate is provided with a strap; the tail plate is arranged on the front section and on the side away from the rear section, and the tail plate can be pivotally connected It is a pivotal displacement of the axis, which is folded on the front section or perpendicular to the front section, so that the user carries the trolley on the body with the strap device and places the items on the tailboard for transportation.

Description

Multifunctional back type trolley

The present invention relates to a trolley, and particularly refers to a multifunctional trolley that can be carried on the back.

According to the new patent case No. M433995 of the Republic of China Certificate No., it discloses a retractable multi-section adjustable cart, which is mainly composed of two main frames and one sub-frame, of which the two main frames and sub-frames The frame has a loading surface, and the auxiliary frame has a track, and the two main frames are respectively slidable in the track of the auxiliary frame, so that the two main frames can slide along the track to a storage position And a deployed position, and when the two main frames are in the storage position, the loading surface of the two main frames will be under the loading surface of the sub-frame; when the two main frames are in the deployed position, the 2. The load surface of the main frame and the load surface of the auxiliary frame will form a larger load surface; by this, the user can adjust the overall load of the cart according to the size of the use site, the size of the goods or the amount of the goods The size of the surface is convenient for use in various situations.

However, although this type of cart can slide along the sub-frame through the two main frames, thereby reducing the volume occupied by the cart during storage, the sub-frame of this cart is for this The second main frame slips, so the volume of the sub-frame itself is relatively large, so even if such a cart can slide the two main frames to reduce the volume of the cart when stored, it is still due to the sub-car The large rack makes the effect of reducing the volume occupied by the cart limited. Furthermore, this kind of cart is a lying cart, so the user cannot make appropriate changes in response to the environment and use requirements, for example: lying The cart is not easy to move in a narrow space, which makes the user unable to use it flexibly.

In view of this, how to solve the above-mentioned problems is the primary problem to be solved by the present invention.

The main purpose of the present invention is to provide a multi-function back-type trolley, which can be pivoted through the design of the push handle, the front section and the rear section, and each wheel set, so that the present invention when stored, compared with the conventional push The car can also effectively reduce the volume consumed during storage. In addition, the multifunctional back-type trolley provided by the present invention can also be changed into an upright trolley or a lying trolley, so that users can use it flexibly according to the environment and usage requirements.

To achieve the foregoing objective, the present invention provides a multifunctional back-type trolley, including: a carrier, having a front section and a rear section assembled with the first section by a first pivot mechanism, and the front section can pass through the The first pivot mechanism and the rear section are folded to each other; one push handle, two second pivot mechanisms are set on the rear section, the push handle can pivot the first pivot mechanism as the axis; four wheel sets, respectively It is pivotally arranged on the front section and the rear section, and each wheel set has a wheel seat provided with a wheel, and each wheel set pivots to a storage position and a use position through its wheel seat, and when each wheel set When in the storage position, each wheel set is horizontal with the carrier, and is located below the carrier; when each wheel set is in the use position, each wheel set is perpendicular to the carrier; The strap device has a back plate, and the strap device is connected to the push handle with one side of the back plate, and the other side of the back plate is provided with a back strap; a tail plate is provided at the front section and away from the It is on one side of the rear section, and the tail plate can be pivotally displaced at the pivot point of the pivot, and is folded on the front section or is perpendicular to the front section.

However, it is not difficult to obtain an in-depth understanding from the following detailed descriptions and drawings of the selected embodiments.

11: front

12: After

13: Side tube

14: casing

15: positioning hole

2: push handle

21: Post

3: wheel set

31: Wheel

32: Wheel seat

33: The first bomb hits the seat

34: Limit seat

35: bump

36: groove

37: The first elastic piece

4: Extension frame

41: Side bar

42: pole

5: The first pivot mechanism

51: pivot lever

52: Second pivot seat

53: Positioning piece

54: The first bump

55: Second bump

56: arc slot

57: Steel sheet

58: accommodating space

581: Set hole

591: limit film

592: Fourth elastic piece

6: Second pivot mechanism

61: Fixed seat

611: Shaft

62: The first pivot seat

621: access hole

63: The second bomb hits the seat

64: slider

641: Card block

66: third elastic

7: Positioning unit

71: Positioning button

72: Guide post

73: Stop

74: Extension

75: second elastic piece

76: Pressing part

8: Tail plate

9: Strap device

91: backplane

92: Strap

93: Buckle

95: Support frame

951: Feet

952: Notch

96: buckle

97: fixings

98: The first buckle

99: second buckle

91: Buckle 9

A: Storage location

B: Use location

C: Expanded position

D: Collapse position

E: folded position

F: horizontal position

G: direct push position

Figures 1 and 2 are schematic views of the three-dimensional structure of the present invention.

Figures 3 and 4 are three-dimensional partial schematic diagrams of the present invention, used to show the assembly relationship of the support frame, the limiting piece and the fourth elastic member.

Figures 5, 6, and 7 are three-dimensional partial schematic diagrams of the present invention, which are used to show the assembly relationship of the wheel seat, the first elastic abutment seat and the limit seat.

Figures 8, 9, and 10 are partial cross-sectional schematic diagrams of the present invention, used to show the assembly relationship between the positioning unit and the positioning hole.

Figures 11, 12, and 13 are schematic plan perspective views of the first pivot mechanism of the present invention.

Figures 14 and 15 are partially enlarged schematic views of the present invention, used to show the assembly relationship between the fixing member and the snap bolt.

Fig. 16 is an exploded perspective view of the second pivot mechanism of the present invention.

Figures 17, 18, and 19 are schematic views of the planar use of the second pivot mechanism of the present invention.

FIG. 20 is a schematic view of the use state of the present invention.

FIG. 21 is a schematic perspective view of the present invention in a reclining trolley mode.

FIG. 22 is a schematic flow chart of the reclining trolley mode of the present invention.

Fig. 23 is a perspective schematic view of the present invention in an upright trolley mode.

Figure 24 is a schematic flow chart of the vertical trolley mode of the present invention.

Please refer to Figures 1 to 24. The figures shown are preferred embodiments of the present invention. This is for illustrative purposes only and is not limited by the described embodiments in the patent application.

As shown in Figures 1 to 4, the present invention provides a multifunctional back-type trolley, which is mainly composed of a carrier, a push bar 2, four wheel sets 3, four extension frames 4, and a strap device 9 , Where: the stage has a generally frame-shaped front section 11 and a generally frame-shaped rear section 12, and the rear section 12 is connected to the front section 11 with a first pivot mechanism 5 so that the front section 11 and the rear section 12 They can be pivotally displaced by the first pivot mechanism 5 respectively. The front section 11 and the rear section 12 are composed of a plurality of pipes, respectively, and have two side pipes 13 and two sleeves 14 spanning the two side pipes 13, the two sleeves 14 are respectively hollow, and at both ends An insertion hole (not shown in the figure) is formed through the inside; at least one set of tubes 14 is provided with four positioning holes 15.

The push rod 2 is generally in a zigzag shape and has two connecting rods 21, which are respectively disposed on the rear section 12 with a second pivot mechanism 6.

The strap device 9 has a back plate 91, and the strap device 9 is assembled with the push handle 2 on one side of the back plate 91, and a pair of straps 92 is provided on the other side of the back plate 91, whereby the user The multifunctional back-type trolley can be carried by the pair of straps 92. In this embodiment, four buckles 93 are provided on one side of the back plate 91, and the strap device 9 has a plurality of buckles 96. The strap device 9 passes through the four buckles 93 and the push handle 2 The buckle 96 is connected.

The front section 12 is pivotally provided with a tail plate 8 on a side away from the rear section 11, and the tail plate 8 can be pivotally displaced at the pivot point of the pivot section, and is folded on the front section or perpendicular to the front section.

The four wheel sets 3 are pivotally arranged on the front section 11 and the rear section 12, respectively, and each wheel set 3 has a wheel seat 32 provided with a wheel 31, and each wheel set 3 pivots to a wheel through its wheel seat 32 Storage position A And a use position B, and when each wheel set 3 is in the storage position A, each wheel set 3 and its corresponding front section 11 and rear section 12 are horizontal; when each wheel set 3 is in the use position B Each wheel set 3 is perpendicular to its corresponding front section 11 and rear section 12 and is located below its corresponding front section 11 and rear section 12.

Preferably, the first pivoting mechanism 5 is hollow and has an accommodating space 58, and a limiting piece 591 and a fourth elastic member that springs against the limiting piece 591 are disposed in the accommodating space 58 In 592, the limiting 591 pieces partially penetrate the accommodating space 58 and are exposed to the outside of the first pivoting mechanism 5, and there are two communicating with the accommodating space 58 on the first pivoting mechanism 5 A set of holes 581; a support frame 95 with its two legs 951 set in the two sets of holes 581, and when the two legs 951 set in the two sets of holes 581, the fourth elastic member 592 snaps against the limiting piece 591, so that the limiting piece 591 and the two missing grooves 952 of the two legs 951 snap against each other.

As shown in FIGS. 5 to 7, each wheel set 3 is composed of a wheel seat 32 provided with a wheel 31, a first snap-in seat 33, and a limiting seat 34. The limiting seat 34 and the first The elastic seat group 33 is connected to each side tube 13, and the wheel seat 32 is slidably disposed between the limiting seat 34 and the first elastic seat 33 and can pivot; the limiting seat 34 is provided on the There are four protrusions 35, and the wheel base 32 is provided with four grooves 36 corresponding to the protrusions 35, and a first elastic member 37 springs against the first spring abutment base 33 and the wheel base 32, The groove 36 of the wheel base 32 and the convex block 35 of the limit seat 34 are mutually locked, so that the wheel base 32 can be pivoted and positioned at the storage position A or the use position B without Pivot at will.

In addition, as shown in FIGS. 8 to 10, the four extension frames 4 have a side rod 41 and two support rods 42 located on the side of the side rod 41, each extension frame 4 is disposed at the front section 11 and the rear end 12 On both sides, and two supporting rods 42 are respectively slidably arranged in the two sleeves 14, and one of the supporting rods 42 of each of the extension frames 4 is respectively provided with a positioning unit 7 corresponding to each of the positioning holes 15; Each positioning unit 7 has a positioning button 71 and a guide post 72, and the positioning button 71 has a stop portion 73 and an extension 74 away from the positioning hole 15, the positioning button 71 with its extension 74 is slidably disposed on the guide post 72, and a second elastic member 75 is sleeved on the outer edge of the extending portion 74, and the second elastic member 75 pushes the blocking portion 73 to make the positioning button 71 Move along the guide post 72 in the direction of the positioning hole 15, and stop the stopping portion 73 on the outer edge of the positioning hole 15 facing the stopping portion 73, and make the stopping portion 73 on One of the pressing portions 76 protrudes into the positioning hole 15 to engage with each other.

As shown in FIGS. 11 to 13, the first pivot mechanism 5 has four pivot rods 51, and a second pivot seat 52 is pivotally provided on each pivot rod 51, and each second pivot The seat 52 is combined with the two side pipes 13 of the front section 11 and the two side pipes 13 of the rear section 12, so that the front section 11 and the rear section 12 can respectively use the second pivot seat 52 to use the pivot rod 51 as The axis is pivotally displaced between an expanded position C and a collapsed position D.

Wherein, each pivoting rod 51 is respectively fixed with a positioning member 53, and the positioning member 53 respectively forms two first raised portions 54 and two second raised portions 55 arranged alternately with the two first raised portions 54, so that An arc groove 56 is formed between each of the first raised portions 54 and each of the second raised portions 55, and the two first raised portions 54 are more raised than the two second raised portions 55 and away from the pivot rods 51. In addition, two arc-shaped steel sheets 57 corresponding to the arc slots 56 are provided in each of the second pivoting seats 52, and when each of the second pivoting seats 52 uses each of the pivoting rods 51 as the pivot axis When swinging, the arc-shaped steel sheet 57 can pass through the second bulging portions 55 through its own elastic margin, but cannot pass through the first bulging portions 54, whereby when the second pivoting seats 52 pivot to In the deployed position C, each of the steel pieces 57 is located in each of the arc grooves 56 and is blocked by each of the first bulging portions 54, so that each of the second pivoting seats 52 cannot be pivoted by the pivoting rod to which it pivots 51 is the axis pivoting in the clockwise direction; when the second pivot base 52 pivots to the retracted position D with each pivot rod 51 as the axis, each of the steel pieces 57 is located in each of the arc slots 56 and blocked by each of the first bulging portions 54 so that each of the second pivoting seats 52 cannot pivot clockwise in the counterclockwise direction with the pivot rod 51 to which it pivots.

It is worth mentioning that, as shown in FIGS. 14 to 15, a fixing member 97 is further pivotally provided on one side of the front section 11, and the fixing member 97 is provided with a first buckling portion 98 and a second buckling portion 99. The rear section 12 is provided on one side corresponding to the fixing member 97 with a locking bolt 991 that can be interlocked with the first buckling portion 98 and the second buckling portion 99, and when the first buckling portion 98 and the buckle When the closing bolt 991 is fixed, the front section 11 and The rear section 12 is maintained at the deployed position C; when the second buckle portion 99 and the buckle pin 991 are fastened, the front section 11 and the rear section 12 are maintained at the retracted position D, thereby passing through the fixing member The design of 97 cooperating with the snap pin 991 ensures that the front section 11 and the rear section 12 can be kept in the deployed position C or the retracted position D without pivoting at will.

Referring to FIGS. 16 to 19, the two second pivot mechanisms 6 are mainly composed of two fixed seats 61 and two first pivot seats 62 composed of two shells, and the two fixed seats 61 are respectively disposed on the On the rear section 12, the two first pivoting seats 62 are respectively pivotally mounted on the two fixing seats 61, and are respectively assembled with the connecting rod 21 of the push handle 2, so that the push handle 2 can use the second fixing seat 61 as an axis The heart pivots.

Wherein, the two first pivoting seats 62 have a chamber, the two first pivoting seats 62 are respectively provided with connecting holes 621 communicating with the chambers on the two sides, and the two first pivoting seats 62 A pivot hole 621 is pivotally connected to a shaft 611 of each of the fixing seats 61, and a second elastic abutment seat 63 fixed to the shaft 611 is provided in each of the chambers A slide button 64 is slidably disposed on one side of each of the resilient seats 63 away from the shaft 611, and a third elastic member 66 is provided between each of the slider 64 and the two second resilient seats 63, and when each When the third elastic member 66 springs against each of the sliding buttons 64 and each of the second springs against the seat 63, one protruding portion 64 of each of the sliding buttons 64 protrudes out of the other connecting hole 621; The button 64 is formed with two clamping blocks 641 on one side facing the other connecting hole 621, and the two first pivoting seats 62 are formed with four clamping blocks 641 on the inner edge of the chamber The two first pivoting seats 62, and when the two first pivoting seats 62 pivot about the shaft 611 of each of the fixing seats 61, the two first pivoting seats 62 pass through each of the locking blocks 641 and each The cooperation of the slot 67 can be positioned at a folding position E, a lateral pushing position F and a pushing position G.

When the present invention composed of the above-mentioned structures is actually used, as shown in FIG. 20, the user can carry the multi-function backable trolley on the body through the strap device 9 and load the items on the tailgate And the supporting frame 95, so that people can conveniently carry items in a narrow space (for example: in an elevator); in addition, the user can also change the trolley provided by the present invention to another two types of trolleys according to the use requirements mode.

Lying trolley: As shown in Figures 21 and 22, the user first presses the limiting piece 591 exposed outside the first pivot mechanism, so that the limiting piece 591 no longer interacts with the groove of the support frame 95 Click to disassemble the support frame 95, and then pivot the tail plate toward the front section with its pivot as the axis, so that the tail plate is folded to the front section, and then the front section is replaced by the first section A pivot rod 51 of a pivot mechanism is pivotally deployed for the axis, so that the front section and the rear section form the loading surface with each other, and then the handle is pivoted to the horizontal thrust position with each fixed seat as the axis, And pivot each wheel group to the use position B with the side tube as the axis, the user can place the article on the loading surface to load the cargo; of course, the user can pass the extension frame 4 through its supporting rod 42 Slide along each of the sleeves 14 to expand the area of the stage for loading items.

Upright trolley: As shown in Figures 23 and 24, the user first pivots the tail plate vertically to the front section, and then presses the limit piece 591 exposed outside the first pivot mechanism to make the limit position The piece 591 no longer interlocks with the groove of the support frame 95, so as to remove the support frame 95, and then pivots the rear section with the pivot rod 51 of the first pivot mechanism as an axis to make the The front section and the rear section form the loading surface with each other, and then the push handle is pivoted to the straight thrust position G (that is, parallel to the tail plate and located on the opposite side of the tail plate) with each fixing base as the axis , And pivot the two wheels near the tail plate to the use position B with the side tube as the axis, the user can place the article on the tail plate and lean against the loading surface to load the goods.

It can be seen from the foregoing description that the advantage of the present invention is that it can be pivoted through the design of the handle 2, the front section 11 and the rear section 12, and each wheel set 3, so that the present invention when stored, compared to the conventional cart It can also effectively reduce the volume consumed during storage. In addition, the multifunctional back-type trolley provided by the present invention can also be changed into an upright trolley or a lying trolley, so that users can use it flexibly according to the environment and usage requirements.

However, the disclosures of the above embodiments are only used to illustrate the present invention, not to limit the present invention. Therefore, the replacement of equivalent elements should still belong to the scope of the present invention.

In summary, when the person who is familiar with this skill understands that the present invention can indeed achieve the aforementioned objectives, and actually complies with the provisions of the Patent Law, he applies for it in accordance with the law.

11: front

12: After

13: Side tube

14: casing

15: positioning hole

2: push handle

21: Post

3: wheel set

4: Extension frame

41: Side bar

42: pole

5: The first pivot mechanism

51: pivot lever

581: Set hole

6: Second pivot mechanism

8: Tail plate

9: Strap device

91: backplane

92: Strap

93: Buckle

95: Support frame

951: Feet

952: Notch

97: fixings

98: The first buckle

99: second buckle

991: Fastening bolt

A: Storage location

Claims (8)

A multifunctional back-type trolley includes: a carrier with a front section and a rear section assembled with the first section by a first pivot mechanism, and the front section can communicate with the rear section through the first pivot mechanism Folded, the front section and the rear section are respectively composed of a plurality of pipe parts with two side pipes and two sleeves spanning the two side pipes, the first pivot mechanism has four pivot rods, and each pivot joint A second pivot seat is provided on the upper pivot of the rod, and each second pivot seat is connected with the two side pipes of the front section and the two side pipes of the rear section, so that the front section and the rear section can respectively pass through the second pivot The swivel base is pivotally displaced between an unfolded position and a retracted position with each pivot rod as an axis; a push handle is set on the rear section with two second swing mechanisms, and the push handle can be The two pivot pendulum mechanism is an axis pivot pendulum; four wheel sets are respectively pivotally arranged on the front section and the rear section, and each wheel set has a wheel seat provided with a wheel, and each wheel set pivots through its wheel seat To a storage position and a use position, and when each wheel set is in the storage position, each wheel set is horizontal to the carrier and is below the carrier; when each wheel set is in the use position At this time, each wheel set is perpendicular to the stage; a strap device has a back plate, and the strap device is connected to the push handle assembly on one side of the back plate, and the other side of the back plate is provided There is a strap; a tail plate, which is arranged on the front section and on a side away from the rear section, and the tail plate can be pivotally displaced by the pivot of its pivot joint, and is folded on the front section or is perpendicular to the front section shape. The multi-function backable trolley according to claim 1, wherein each wheel seat of the wheel set has a first snap-in seat and a limit seat respectively, and the limit seat is connected with the first snap-in seat And arranged on each side tube, the wheel seat is slidably arranged between the limit seat and the first elastic abutment seat and can be pivoted; the limit seat is provided with at least two protrusions, and the wheel seat is There are two grooves corresponding to the four protrusions, and a first elastic member springs between the first spring abutment seat and the wheel seat, so that the groove of the wheel seat and the protrusions of the limit seat interlock with each other In this way, the wheel base can be positioned at the storage position or the use position. The multifunctional back-type trolley according to claim 1, wherein the two sleeves are respectively hollow, and an insertion hole penetrating through the inside is opened at both ends; at least one set of tubes is provided with at least one positioning hole There are also four extension frames with one side rod and two support rods located on one side of the side rod respectively, each of the extension frames is disposed on both sides of the front section and the rear end, and the two support rods are respectively slidably disposed on the In the two sleeves, one of the rods of each extension frame is respectively provided with a positioning unit corresponding to the positioning hole. The multi-function backable trolley according to claim 3, wherein each of the positioning units has a positioning button and a guide post, and the positioning button has a stopper and an extension away from the positioning hole, The positioning button is slidingly arranged on the guide post with its extension part, and a second elastic member is sleeved on the outer edge of the extension part, and the second elastic member pushes the stopper part to make the positioning button move along the The guide post moves in the direction of the positioning hole, and the stopper is stopped on the outer edge of the positioning hole facing the stopper, and a pressing portion on the stopper protrudes to the Locate inside the holes and engage with each other. The multifunctional back-type trolley according to claim 1, wherein each pivoting rod is respectively provided with a positioning member, and the positioning member respectively forms two first raised portions and two The second raised portions of the two first raised portions are alternately arranged, so that an arc groove is formed between each of the first raised portions and each of the second raised portions, and the two first raised portions are compared with the second second raised portions It is more swelled away from each of the pivot rods, and two arc-shaped steel sheets corresponding to the arc slots are respectively disposed in each of the second pivot seats, and when each of the second pivot seats is provided with each of the pivot rods When the axis is pivoted to the deployed position, each of the steel plates is located in each of the arc slots and is blocked by each of the first ridges, so that each of the second pivot seats cannot be pivotally connected by the pivot The rod pivots in the clockwise direction of the axis; when the second pivot base pivots to the collapsed position with each pivot rod as the axis, each of the steel pieces is located in each of the arc slots and is affected by each The first bulge is blocked, so that each second pivoting base cannot pivot clockwise in the counterclockwise direction with the pivot rod to which it pivots. The multifunctional back-type trolley according to claim 1, wherein the push handle is set on the rear section with the two second pivot mechanisms, and the two second pivot mechanisms are mainly composed of two fixed seats and two first The pivot seat is composed of the two fixed seats respectively arranged on the rear section, the two first pivot seats are respectively pivotally arranged on the two fixed seats, and are connected with the push handle, so that the push handle can be fixed by the two The seat pivots about the axis. The multifunctional back-type trolley according to claim 6, wherein the two first pivoting seats have a compartment, and the two first pivoting seats are respectively provided with a connection with the compartment on both sides of the two first pivoting seats A hole is provided, and the two first pivoting seats are respectively pivotally connected to a shaft of each of the fixed seats through one of the connecting holes, and a second elastic abutment seat fixed to each of the shafts is provided in each of the chambers, A sliding button is slidably disposed on one side of the two second elastic abutting seats away from each of the shafts, and a third elastic member is provided between each sliding button and the two second elastic abutting seats, and when each of the two The third elastic member respectively springs against the sliders and the second springs At this time, one protruding portion of each of the sliding buttons protrudes out of the other connecting hole; each of the sliding buttons is formed with at least one clamping block on one side facing the other connecting hole, and the two first pivots The inner edge of the swivel seat is formed with at least two snap grooves that can cooperate with the snap block, and when the two first pivot seats pivot about the shaft of each fixed seat, the The two first pivoting seats can be positioned in a folded position, a laterally pushed position and a continuously pushed position through the cooperation of the clamping block and the two clamping grooves. The multifunctional back-type trolley according to claim 1, wherein the first pivoting mechanism is hollow and has an accommodating space, and a limiting piece and a resilient piece are arranged in the accommodating space The fourth elastic piece of the position piece is further provided with two assembly holes communicating with the accommodating space on the first pivot mechanism; a support frame is set in the two assembly holes with its two legs, and When the two leg sets are disposed in the two set holes, the fourth elastic member springs against the limiting piece, so that the limiting piece and the two missing grooves of the two legs are mutually locked.

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