CN2174384Y - Collapsible structure for handle bars of hand cart - Google Patents

Abstract

The utility model relates to a simple collapsible structure for pushing rods of handcarts. Both sides of a goods plate shaped by the injection of plastics are respectively provided with symmetrical straight-rod placing slots, and the inner edge walls of the opening ends of the two straight-rod placing slots are respectively provided with a pressure-bearing element. The pressure-bearing arm plate of the inner edge of the pressure-bearing element is exposed out of the inner edge wall of the straight-rod placing slot of the goods plate, and a movable joint pivoted at the other end of the straight-rod placing slot of the goods plate is pivoted with a pushing rod. A telescoping and buckling element is arranged between the straight-rod of the pushing rod and the pivoting edge of the telescopic rod. When the pushing rod is folded and guided in the straight-rod placing slot and the telescoping and buckling element and the pressure-bearing element on the inner edge wall of the straight-rod placing slot are adjacent, the telescoping and buckling element can generate a compression force with the buckling joint of an elastic arm plate. The adjacent buckling point is compressed and moved inward, and the telescopic rod is easy to be folded.

Description

Collapsible structure for handle bars of hand cart

The relevant a kind of hand barrow of the utility model, especially the trolley pole that refers to a kind of hand barrow is when amounting to importing straight-bar putting groove, pressure parts by inner wall provides the flexible buckling element that is hubbed between straight-bar and expansion link to form open state, makes bipole body be easy to fold and is its characteristic person.

Hand barrow in prior art, the below that generally lies in the glove plate is articulated with the runner that can promote, glove plate upper limb is provided with the drive-connecting shaft that articulates for the go-cart rod end, and be arranged at the top of glove plate with suitable joint, but utilize glove plate upper limb face stacked items, be transported to suitable position, this trolley pole is not when using, utilize turning joint the trolley pole bending can be put glove plate upper limb face position, when not using at ordinary times, this handcart system is flat on the appropriate location on floor, the glove plate upper limb face of this hand barrow is put because of the bending that trolley pole is arranged, almost be difficult in the upper limb space of this hand barrow to utilize as the piling up of article, only under the situation that this trolley pole does not bend, can pile up and put a little article; The design of this hand barrow outside carrying work, takes up space very much; This is positioned between trolley pole and glove plate is as the person of folding by the adjustment of a turning joint.

At known baggage handling bassinet structure, it lies between the bipole body that can fold, be pivoted with respectively and be the spherical fastening point of pearl, after stretching, utilize the spherical snapping point of this pearl as the fastening between the body of rod, when folding, by the strength of hand, this snapping point is pressed down, utilize the strength of bestowing between the body of rod again, impel this pearl ball to fasten point and be moved to non-fastening place, to reach to the stretching between pull bar and to fold purpose; The only enforcement of this skill, needing in abutting connection with edge between this bipole body is less, and the thickness of the body of rod needs the thin beginning be easy to reach, otherwise should be with the fastening point of ball shape as the fastening effect that is difficult between the edge portion that fastens pivot joint reaching good.

The purpose of this utility model provides a kind of hand barrow, and its car bar retracting structure is improved, thereby is convenient to its horizontal or vertically-arranged and carries.

Its feature of trolley pole retracting structure that the utility model provides ties up in glove plate two sides of hand barrow and is provided with the straight-bar putting groove that can import storing for trolley pole, is respectively equipped with pressure parts in putting groove edge open end inner wall position; In between the straight-bar of trolley pole and expansion link, be provided with flexible buckling element, when trolley pole is amounted to importing straight-bar putting groove position, when the flexible buckling element of this trolley pole contacts with pressure parts, the snapping point pressurized that impels this flexible buckling element is to intrinsic displacement, and then impels rod member to do the suitable displacement location person that folds.

Its feature of trolley pole retracting structure that the utility model provides, tie up to the pressure parts that is hubbed at glove plate straight-bar putting groove open end inner wall in this, its thickness setting with a pressure parts fit adjacent wall is inverted U-shaped, and be provided with a radius arm plate in inner edge, utilize radius arm plate and in-to-in anchor fitting to articulate the inner wall position that is positioned the straight-bar putting groove as set; This pressure parts utilizes the flexible buckling element adjacency that is subjected to pressure arm plate and trolley pole of outer rim.

Its feature of trolley pole retracting structure that the utility model provides, tie up to expansion link in hub setting in trolley pole and the flexible buckling element between straight-bar, it lies in the hub setting of expansion link port inner edge an elastic arm plate, this elastic arm plate is provided with the snapping point in an end, this snapping point is positioned at athwartship plane, and to be positioned at outer edge be a beveled edge face, the leading edge face is shorter, rear surface is longer, longitudinal surface is an arc surface, this trolley pole is when amounting to the straight-bar putting groove position that imports glove plate two sides, snapping point that should flexible buckling element is when being contacted by element, and generation presses retraction inside, impels this expansion link to be easy to be pressed into the person of folding.

Its feature of trolley pole retracting structure that the utility model provides, tie up to and articulate intermarginal in the straight-bar and the expansion link of trolley pole, be provided with a port distance piece at straight-bar outer rim port and inner edge pipe face position, be provided with an inner edge distance piece at expansion link inner edge port and inner edge pipe position, this inner edge distance piece system moves together with expansion link, and the port position of straight-bar is fixed in this port distance piece system, and this expansion link utilizes the setting of two distance pieces, when folding displacement, have and be easy to the guide function that stretches.

Its feature of trolley pole retracting structure that the utility model provides ties up in the straight-bar inner edge of trolley pole and is provided with the snapping point, when this snapping point system is pressed into summit, straight-bar inside for expansion link, as locating, provides hand barrow to be easy to portable by this snapping point.

Fig. 1 is a block diagram of the present utility model, the trolley pole that shows this hand barrow state that is vertical setting.

Fig. 2 is a block diagram of the present utility model, shows that the trolley pole of this hand barrow is the state of setting of amounting to.

Fig. 3 is a block diagram of the present utility model, shows that this hand barrow is collapse state.

Fig. 4 is a section-drawing of the present utility model, shows that the trolley pole hub setting is in the straight-bar putting groove location state diagram of glove plate.

Fig. 5 is a part block diagram of the present utility model, shows that glove plate leading edge pressure parts is provided with graph of a relation.

Fig. 6 is a section-drawing of the present utility model, shows that trolley pole imports straight-bar putting groove position, and flexible buckling element and pressure parts are adjacency state structural relation figure.

Fig. 7 is a section-drawing of the present utility model, shows the another kind of fixed form of pressure parts.

Fig. 8 is a section-drawing of the present utility model, shows that flexible buckling element is button pin-jointed structure figure at ordinary times.

Fig. 9 is a section-drawing of the present utility model, shows between flexible buckling element and pressure parts to be the adjacency state constructional drawing.

Figure 10 is a section-drawing of the present utility model, shows the snapping inter-module constructional drawing that expansion link inwardly pushes.

The relevant simple and easy retracting structure of a kind of hand barrow trolley pole of the utility model system, as shown in Figures 1 to 4, two sides that this hand barrow 10 lies in glove plate 12 are provided with symmetrical straight-bar putting groove 36, inner edge activity space 20 lower ends in straight-bar putting groove 36, be articulated with turning joint 13 and trailing wheel 15 respectively by a rotating shaft 17, these turning joint 13 upper ends are articulated with trolley pole 11, this trolley pole 11 utilizes activity space 20, can be the usefulness of perpendicular positioning, and amount to the straight-bar putting groove that is directed in glove plate 12 2 sides 36 positions as the carrying article; This trolley pole 11 is when importing straight-bar putting groove 36, this trolley pole 11 by the pressure parts 21 of the flexible buckling element 32 of 33 of straight-bar 30 and expansion links and straight-bar putting groove 36 inner walls 57 in abutting connection with the time, should stretch buckling element 32 pressurizeds to intrinsic displacement, make the expansion link 33 of trolley pole 11 be easy to be pressed into and fold the location, this trolley pole 11 is with the shortest hub setting state, is beneficial to horizontal or stands or portable.

Please consult Fig. 5 again, 6, glove plate 12 2 sides of the present utility model are the straight-bar putting groove 36 of symmetry, be positioned at outer rim open port position and be provided with a pressure parts 21, this pressure parts 21 is the structure setting that cooperates front-wheel 14 in diagram, (shown in Figure 7 in addition, system independent with a screw as locking), this pivot joint combine component mainly is that the neighbour is provided with a pivot connecting seat 18 in the open port inboard of straight-bar putting groove 36, these pivot connecting seat 18 central authorities are provided with a through hole 54, this through hole 54 passes for front-wheel 14 upper limb screw assembliess 27, and in the through hole of pivot connecting seat 18 up and down edge respectively hub setting have on one, following backplate 41,40, screwed togather locking in inner edge by a packing ring 42 and nut 43; When 43 pairs of upper limb screw assembliess 27 of this nut screw togather locking, simultaneously pressure parts 21 is done to articulate the location, this pressure parts 21 is to utilize the radius arm plate 23 of acies down, hub setting is in in-to-in hub setting groove, when nut 43 screws togather fixedly, pressure parts 21 is fixed in pivot connecting seat 18 positions by the pressure of upper guard board 41;

At pressure parts 21 of the present utility model, for another shown in Figure 7, this pressure parts 21 is also mismatched the setting of front-wheel, the outer rim open port inboard of putting groove 36 in straight-bar is provided with a pivot connecting seat 18, these pivot connecting seat 18 inner edges can be inserted for radius arm plate 23 ends of pressure parts 21, this radius arm plate 23 is provided with the circular hole that can supply screw to pass, and the mat screw is fixed in pivot connecting seat 18 positions with pressure parts 21;

This pressure parts 21 is to be a reverse U shape setting, in inner edge arm plate 22 and be subjected to the spacing of 24 of pressure arm plates, is the thickness setting of fit adjacent wall 25; This pressure parts 21 is positioned at inner edge arm plate 22 lower edges and is extended with radius arm plate 23, and this radius arm plate 23 is positioned pivot connecting seat 18 inner edge positions with screw, in the upper limb of pivot connecting seat 18 loam cake 26 that is pivoted, provides glove plate upper limb face 38 to keep smooth; This pressure parts 21 is by the setting that is subjected to pressure arm plate 24, and when trolley pole 11 imported straight-bar putting groove 36, flexible buckling element 32 pressurizeds that 33 of straight-bar 30 and expansion links are provided were to intrinsic displacement, and convenient trolley pole 11 folds short length.

Trolley pole 11 structures of the present utility model, see also Fig. 1, shown in 6 and 9, two straight-bars 30 of this trolley pole 11 lie in an end and articulate with turning joint 13 respectively, 30 of two straight-bars are articulated with location cross bar 31, in addition end articulates with two ends of expansion link 33 respectively, for the body of rod length of convenient trolley pole 11 is stretched to optimum height, transport as loading, this expansion link 33 is stretchable to suitable height, can shorten the length of trolley pole 11 after the use, convenient horizontal or collection or portable, be provided with a flexible buckling element 32 in this straight- bar 30 and 33 of expansion links, before the buckling element 32 that should stretch is provided with, for the stretching of convenient expansion link 33 and fold, be provided with a port distance piece 51 in straight-bar outer rim port and inner edge pipe face position, and be provided with an inner edge distance piece 52 in the expansion link inner edge port and the inner edge pipe position of expansion link 33, the internal diameter system of this port distance piece 51 cooperates the external diameter setting of expansion link 33, and internal diameter slides for expansion link 33; This is located at the inner edge distance piece 52 of expansion link inner edge port and inner edge pipe position, the horizontal cutting margin surface adjacent with the internal diameter of straight-bar 30 is to be a cambered surface, utilize the vertex and the straight-bar 30 internal diameter adjacency of this cambered surface,, and can produce the deflection situation at present in guiding in formed resistance minimum of when guiding;

The stretching that this straight-bar 30 and expansion link are 33 with fold, the adjacent flexible buckling element 32 that is pivoted with in the inside of expansion link 33 ports of system, should flexible buckling element 32 be that a end by elastic arm plate 44 is provided with snapping point 45, the elastic arm plate 44 curved arc setting that takes the shape of the letter U, end is held on the inner edge tube wall of expansion link 33 in addition; After the buckling element 32 that should stretch was provided with the location, the pipe wall position that is positioned at 45 settings of snapping point was provided with a through hole 55, and this through hole 55 provides the snapping point 45 with elasticity strength to keep the strength of stretching out outward;

Snapping point 45 that should flexible buckling element 32, shown in diagram, it is to be athwartship plane to be positioned at outer edge be a beveled edge face 48, and leading edge face 46 is short arcwall face, and rear surface 47 is established and is the arcwall face of length; This snapping point 45 is longitudinal surface, the position system that is arranged in beveled edge face 48 is an arc surface (being shown in Fig. 6), provide trolley pole 11 when amounting to straight-bar putting groove 36 positions that import glove plate 12 2 sides, when the snapping point 45 of this flexible buckling element 32 contacts with pressure parts 21, generation presses and retraction inside, make flexible buckling element 32 form open state, can provide expansion link 33 to be pressed into the length that folds to the shortest;

At the snapping point 45 that flexible buckling element 32 of the present utility model is provided with in elastic arm plate 44 1 ends, acies was cylindric in another kind lay in, and outer rim is the setting of semi-round ball bead-like body, has to be similar to known pearl globoid;

This is for the straight-bar 30 of expansion link 33 hub settings, be positioned at the position that is mutual fastening between bipole body and be provided with a through hole 60, with provide bipole body at ordinary times snapping be one, as shown in Figure 8, be 33 of straight-bar 30 and expansion links, by flexible buckling element 32 bipole body is articulated to fasten at ordinary times and be one, should stretch buckling element 32 when fastening pivot joint, system utilizes snapping point 45 to detain to the through hole 55 of expansion link 33 and the through hole 60 of straight-bar 30, and before this snapping point 45, rear surface 46,47 height is all had a few distance apart from the external diameter of straight-bar 30, what this snapping point 45 was very safe is one with the bipole body snapping, can not produce the situation that gets loose easily;

When trolley pole 11 is amounted to, this trolley pole 11 utilizes turning joint 13 to import straight-bar putting groove 36 positions of glove plate 12 2 side symmetries, when importing the location, as shown in Figure 2, be positioned at the elasticity buckling element 39 of a straight-bar putting groove 36 inboards, provide trolley pole 11 to be positioned straight-bar putting groove 36 positions, can not produce the situation that gets loose arbitrarily; This has imported the trolley pole 11 that is positioned straight-bar putting groove 36 positions, is positioned at the body of rod of straight-bar putting groove 36 leading edge open ends, and the length that obviously surpasses glove plate 12 is a lot of, is positioned at glove plate 12 outer fringe positions for convenient expansion link 33 folds; When this trolley pole 11 is positioned at straight-bar putting groove 36 positions in importing, this flexible buckling element 32 that is positioned at 30 of expansion link 33 and straight-bars and pressure parts 21 in abutting connection with after, this flexible buckling element 32 is that pressurized produces and opens shape; As Fig. 6, shown in 9, should stretch buckling element 32 when importing, beveled edge face 48 by snapping point 34 has arcwall face longitudinally, with pressure parts 21 in abutting connection with the time, through hole 60 retractions to straight-bar 30, the adjacent acies of this beveled edge face 48 and leading edge face 46 is lower than the internal diameter of straight-bar 30, when expansion link 33 folds passing, the beveled edge face 48 of this snapping point 45 produces guiding easily, directly be directed in the internal diameter (as shown in figure 10) of straight-bar 30, this expansion link 33 continues inwardly to promote, when the sink node position, what this straight-bar 30 was positioned at that snapping point 45 slides axially is provided with a snapping point 53(as shown in figure 11 in addition), the rear surface 47 of this snapping point 45 and the arcwall face that the adjacent edge face of beveled edge face 48 is had are located with the snapping point 53 generation snappings of straight-bar 30, and the snapping strength system of this position is greater than the moment that weight produced of hand barrow 10, when hand barrow 10 portables, this snapping point 53 can not produce the situation that gets loose with the snapping of snapping point 45.

Trolley pole retracting structure of the present utility model, straight- bar 30 and 33 of expansion links by trolley pole 11 are provided with a flexible buckling element 32, and one pressure parts 21 is set in the straight-bar putting groove 36 inner edge positions that trolley pole 11 is directed in glove plate 12 2 sides, provide flexible buckling element 32 importing the location simultaneously by this pressure parts 21, make and fasten some generation open state, and then provide expansion link 33 directly to be pressed into the length that shortens trolley pole 11, be positioned at glove plate 12 outer fringe positions, make hand barrow 10 be easy to horizontal or stand and put or portable.

The utility model is illustrated respectively by above-mentioned embodiment, significantly the trolley pole retracting structure of known hand barrow is done the actv. improvement, meets the purpose of practicality, and structure also has its originality.

Claims (4)

1, the simple and easy retracting structure of hand barrow car bar includes:

One glove plate, make with plastic rubber ejaculate molding, be provided with the straight-bar putting groove of symmetry in two sides, this straight-bar putting groove inner edge is provided with the activity space for the turning joint hub setting, outer rim is an open port, this two straight-bars putting groove neighbour is provided with a pivot connecting seat in the open port inner wall, this pivot connecting seat articulates fixing for a pressure parts;

Two turning joints are that hub setting is in the activity space position of glove plate straight-bar putting groove respectively, and an end is located by a rotating shaft cross-under, and end is articulated with trolley pole in addition;

One trolley pole is to be articulated with turning joint respectively by two straight-bar ends, and this two straight-bars upper end articulates with expansion link respectively, fastens pivot joint by flexible buckling element between this straight-bar and expansion link;

It is characterized in that this glove plate two sides symmetry straight-bar putting groove outer rim respectively is provided with a pivot connecting seat, this pivot connecting seat is articulated with a pressure parts that is inverted U, this pressure parts hub setting is in the adjacent wall position, and the laminating arms plate system that is positioned at the adjacent wall outer rim is positioned on the wall edge of straight-bar putting groove inner wall; Be by a flexible buckling element snapping between the straight-bar of this trolley pole and expansion link, should flexible buckling element be the expansion link inner edge pipe inside of hub setting in expansion link, by one have snapping point the U type the hub setting of elastic arm plate wherein, this elastic arm plate one end is held on the inner edge tube wall, and the snapping point of other end passes through hole and communicates with the through hole of straight-bar adjacent position; Pressure parts by these glove plate two straight-bar putting groove outer rim hub settings, when trolley pole is amounted to the straight-bar putting groove position that is directed in the glove plate, this is positioned at straight-bar and contacts pressurized to intrinsic displacement with flexible buckling element between expansion link with pressure parts, is easy to expansion link and shortens to the straight-bar pressing.

2, the simple and easy retracting structure of hand barrow trolley pole as claimed in claim 1, it is characterized in that, this is hubbed at the pressure parts of glove plate straight-bar putting groove outer rim pivot connecting seat position, system is a reverse U shape setting, in inner edge arm plate and be subjected to spacing between the pressure arm plate, system cooperates the thickness setting of the adjacent wall of hub setting location, is positioned at inner edge arm plate lower edge and is extended with the radius arm plate, and this radius arm plate is positioned pivot connecting seat inner edge position person with screw.

3, the simple and easy retracting structure of hand barrow trolley pole as claimed in claim 1, it is characterized in that, the flexible buckling element of this hub setting between straight-bar and expansion link, its be adjacent inside in the expansion link port with one take the shape of the letter U curved arc the hub setting of elastic arm plate wherein, one end of this elastic arm plate is provided with the snapping point, and end is held on the inner edge tube wall of expansion link in addition; Snapping point that should flexible buckling element a kind ofly lies in athwartship plane to be positioned at outer edge is a beveled edge face, and the leading edge face is established the arcwall face that is short, and rear surface is established the arcwall face that is long; This snapping point is longitudinal surface, and the position system that is positioned at the beveled edge face is an arc surface person.

4, the simple and easy retracting structure of hand barrow trolley pole as claimed in claim 1, it is characterized in that the flexible buckling element of this hub setting between straight-bar and expansion link, the snapping point that is pivoted in flexible buckling element one end, acies is cylindric in a kind of the lying in, and outer rim is the semi-round ball bead-like body person of setting.

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