CN215913584U - Telescopic pull rod assembly - Google Patents

Abstract

The utility model provides a telescopic pull rod assembly which comprises an upper pull rod and a lower pull rod, wherein the upper pull rod is inserted into the lower pull rod and can move up and down in the lower pull rod, the telescopic pull rod assembly further comprises a cross rod, the cross rod is fixedly connected with the lower pull rod, a locking piece and an elastic piece are arranged in the cross rod, the locking piece can move in the cross rod, the elastic piece is positioned on one side of the locking piece and connected with the locking piece, and the locking piece can move under the driving of the elastic piece and can lock and fix the upper pull rod and the lower pull rod. The telescopic pull rod assembly disclosed by the utility model is simple in structure, and can be used for simply and effectively realizing locking and unlocking of the upper pull rod and the lower pull rod.

Description

Telescopic pull rod assembly

Technical Field

The utility model relates to the technical field of telescopic rods, in particular to a telescopic pull rod assembly.

Background

The existing tool boxes are mostly in single use scenes, so that the conventional tool boxes can meet the use requirement only by carrying one handle. However, in recent years, with the need for users to carry more and more specialized tools and move tasks, the tool box needs to have the function similar to a luggage box: not only can accommodate a plurality of tools, but also is convenient to move. The tool box is completely different from the use environment of the luggage case, a plurality of tools can be contained in the tool box, the tool box can be dragged and moved to a designated work place at any time, and meanwhile, a reliable connection mode is required among the box bodies to guarantee that the tool box can be carried with a plurality of boxes to carry out moving operation. Therefore, the tool box is generally provided with wheels and a pull rod, the pull rod has a telescopic function to meet the use scenes of different heights, the pull rod needs to be retracted when the tool box is placed in vehicles such as a pickup truck, and the pull rod needs to be extended when the tool box is normally pulled for use. Because of the service environment in building site and the load of toolbox all put forward higher requirement to reliability, the fastness of flexible pull rod, if directly with the pull rod application on the suitcase then can not satisfy actual user demand completely on the toolbox.

However, the existing telescopic pull rod on the market is generally complex in structure, and unlocking and locking of the pull rod can be realized only after interaction of a plurality of parts. For example, patent No. CN209478149U discloses a telescopic tool box pull rod, which mainly achieves the purpose of unlocking and locking by matching an inclined surface on a bolt with an inclined surface on a pressing block, when the inclined surface on the pressing block is pressed down, the inclined surface on the bolt is forced to move toward the middle to achieve the purpose of unlocking, and when the pressing block is released, the bolt is bounced off from both ends under the action of a middle spring, and the pressing block returns to its original position through the inclined surfaces. The locking/unlocking structure is complex in structure, and functions by the friction of the inclined plane between the plastic parts, so that unlocking hand feeling is not ideal, and the movement of the bolt and the pressing block is not smooth.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a telescopic pull rod assembly, which aims to overcome the defects in the prior art, has a simple structure and can lock and unlock an upper pull rod and a lower pull rod more simply and effectively.

The utility model provides a telescopic pull rod assembly which comprises an upper pull rod and a lower pull rod, wherein the upper pull rod is inserted into the lower pull rod and can move up and down in the lower pull rod, the telescopic pull rod assembly further comprises a cross rod, the cross rod is fixedly connected with the lower pull rod, a locking piece and an elastic piece are arranged in the cross rod, the locking piece can move in the cross rod, the elastic piece is located on one side of the locking piece and connected with the locking piece, and the locking piece can move under the driving of the elastic piece and can lock and fix the upper pull rod and the lower pull rod.

Furthermore, the upper pull rod is provided with a positioning hole, the locking piece can move under the driving of the elastic piece and is inserted into the positioning hole, and the locking piece is provided with a protruding part for shifting the locking piece.

Furthermore, the number of the upper pull rods and the number of the lower pull rods are two, the two upper pull rods are arranged oppositely, the two lower pull rods are arranged oppositely, the two upper pull rods are respectively inserted into the two lower pull rods, and two ends of the cross rod are respectively connected with the two lower pull rods.

Further, the cross rod comprises a first main body part and sleeving parts arranged at two ends of the first main body part, the sleeving parts at two ends of the first main body part are respectively sleeved and fixed on the two lower pull rods, and the locking piece and the elastic piece are arranged in the first main body part.

Furthermore, a first perforation is arranged on the sleeving part, a second perforation is arranged on the lower pull rod corresponding to the first perforation, and the elastic piece can sequentially penetrate through the first perforation and the second perforation and then is inserted into the positioning hole.

Furthermore, the telescopic pull rod assembly also comprises a handle, and two ends of the handle are respectively fixedly connected with the tops of the two upper pull rods; the cross bar is hollow in the middle, and an opening is formed in the bottom of the cross bar; the locking piece is middle fretwork design just be provided with the strengthening rib on the locking piece.

Furthermore, the quantity of locking piece is two, two the locking piece sets up relatively, the elastic component presss from both sides and locates two between the locking piece, the both ends of elastic component respectively with two the locking piece supports and leans on, the elastic component can drive two the locking piece moves towards the direction of keeping away from each other and inserts respectively to two on the upper tie the locating hole.

Furthermore, the locking piece comprises a second main body part and a plug pin part which are connected with each other, the plug pin part is located on one side, away from the elastic piece, of the second main body part, a step is formed at the joint of the plug pin part and the second main body part, a stopping part is arranged in the cross rod and located on one side, away from the elastic piece, of the second main body part, and the step can abut against the stopping part.

Furthermore, a protruding rod is arranged at one end, close to the elastic piece, of the locking piece, and the elastic piece is sleeved on the protruding rod.

Furthermore, a through hole is formed in the cross rod corresponding to the position of the protruding portion, and the protruding portion penetrates through the through hole and then is exposed outside.

Furthermore, the positioning holes comprise a first positioning hole and a second positioning hole, the first positioning hole and the second positioning hole are respectively arranged at the upper end and the lower end of the upper pull rod, and the locking pieces can be respectively inserted into the first positioning hole and the second positioning hole.

According to the telescopic pull rod assembly provided by the utility model, through the mutual matching between the locking piece and the elastic piece, the locking piece can move under the driving of the elastic piece and lock and fix the upper pull rod and the lower pull rod; when the unlocking is needed, the unlocking can be easily realized only by pinching and stirring the convex part on the locking piece with a hand to enable the locking piece to move reversely. The telescopic pull rod assembly not only can simply and effectively realize locking and unlocking of the upper pull rod and the lower pull rod, is good in operation hand feeling, stable and reliable in structure, capable of bearing heavy objects, small in number of parts, simple in structure, capable of reducing assembly procedures and saving cost.

Drawings

Fig. 1 is a schematic perspective view of a telescopic handle assembly according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of the telescopic handle assembly in fig. 1 after the upper rod is extended upwards.

Fig. 3 is a schematic diagram of the exploded structure of fig. 1.

Fig. 4 is a schematic cross-sectional view of fig. 1.

FIG. 5 is a schematic structural diagram of a locking member according to an embodiment of the utility model.

Fig. 6 is a schematic structural diagram of a cross bar in an embodiment of the utility model.

Fig. 7 is a bottom view of fig. 6.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms of orientation, up, down, left, right, front, back, top, bottom, and the like (if any) referred to in the specification and claims of the present invention are defined by the positions of structures in the drawings and the positions of the structures relative to each other, only for the sake of clarity and convenience in describing the technical solutions. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

As shown in fig. 1 to 4, the retractable tie bar assembly provided by the embodiment of the present invention can be mounted on a tool box (not shown). The telescopic pull rod assembly comprises an upper pull rod 1, a lower pull rod 2 and a cross rod 3, wherein the upper pull rod 1 is inserted into the lower pull rod 2 and can move up and down in the lower pull rod 2, and the cross rod 3 is fixedly connected with the lower pull rod 2. Be equipped with locking piece 4 and elastic component 5 in the horizontal pole 3, locking piece 4 can remove in horizontal pole 3, and elastic component 5 is located one side of locking piece 4 and links to each other with locking piece 4, and locking piece 4 can remove and fix upper pull rod 1 and 2 locks of lower link under the drive of elastic component 5.

Further, in the present embodiment, the upper rod 1 is provided with a positioning hole 11, the locking member 4 can be driven by the elastic member 5 to move and be inserted into the positioning hole 11, and the locking member 4 is provided with a protrusion 41 for toggling the locking member 4.

In particular, in the present embodiment, the upper pull rod 1, the lower pull rod 2 and the cross rod 3 are all hollow structures, which not only can reduce the weight, but also can save the material cost. The inner cavity of the lower pull rod 2 can be used as a track for the upper pull rod 1 to move up and down, and the bottom of the lower pull rod 2 is used for connecting a tool box or other heavy objects. When the upper pull rod 1 and the lower pull rod 2 need to be locked and fixed, the locking piece 4 is driven by the elastic piece 5 to move and be inserted into the positioning hole 11 on the upper pull rod 1 through the mutual matching between the locking piece 4 and the elastic piece 5, so that the automatic locking and fixing between the upper pull rod 1 and the lower pull rod 2 are realized; when the unlocking is needed, the unlocking can be easily realized only by pinching and stirring the convex part 41 on the locking piece 4 by hands to enable the locking piece 4 to move reversely.

Further, in the present embodiment, the elastic member 5 is a spring, but the elastic member 5 may be other devices having elasticity, such as elastic silicone rubber, elastic rubber, and the like.

Further, as shown in fig. 4 and 6, in the present embodiment, the cross bar 3 is provided with a through hole 34 at a position corresponding to the protrusion 41, and the protrusion 41 is exposed after passing through the through hole 34, so that the user can easily grasp the protrusion 41 with the hand. In the present embodiment, the through hole 34 is disposed on the top wall of the cross bar 3, however, in other embodiments, the through hole 34 may be disposed on the side wall of the cross bar 3 or other positions on the cross bar 3.

Further, as shown in fig. 1 to 4, the number of the upper pull rods 1 and the lower pull rods 2 is two, the two upper pull rods 1 are arranged oppositely, the two lower pull rods 2 are arranged oppositely, the two upper pull rods 1 are respectively inserted into the two lower pull rods 2, and two ends of the cross rod 3 are respectively connected with the two lower pull rods 2.

Further, as shown in fig. 1 to 4, the telescopic pull rod assembly further includes a handle 6, and both ends of the handle 6 are respectively fixedly connected to the tops of the two upper pull rods 1.

Specifically, as shown in fig. 3, the handle 6 may be fixedly connected to the upper pull rod 1 through a first fixing member 71, and the first fixing member 71 may be a screw, a rivet, or the like. The handle 6 can be used as a handle for a user to pull the telescopic handle assembly, and since the two upper rods 1 are connected into a whole by the handle 6, the two upper rods 1 can be moved up or down together by pulling or pushing the handle 6 up or down.

Further, the cross rod 3 can be hollow in the middle and the bottom of the cross rod 3 is provided with an opening, so that the inner locking piece 4 can be conveniently mounted and dismounted. As shown in fig. 4 and fig. 6, in the present embodiment, the cross bar 3 includes a first main body portion 31 and two sleeve portions 32 disposed at two ends of the first main body portion 31, the sleeve portions 32 are hollow structures, the sleeve portions 32 at two ends of the first main body portion 31 are respectively fixed on the two lower pull rods 2, and the locking member 4 and the elastic member 5 are disposed in the first main body portion 31.

Specifically, as shown in fig. 3, the sleeve part 32 may be fixedly connected to the lower link 2 by a second fixing member 72, and the second fixing member 72 may be a screw, a rivet, or the like.

Further, as shown in fig. 3 and 7, in the present embodiment, the socket portion 32 is provided with a first through hole 321, the lower rod 2 is provided with a second through hole 21 at a position corresponding to the first through hole 321, and the elastic element 5 can be inserted into the positioning hole 11 after sequentially passing through the first through hole 321 and the second through hole 21.

Further, as shown in fig. 3 and 4, in this embodiment, the number of the locking members 4 is two, the two locking members 4 are disposed opposite to each other, the elastic member 5 is sandwiched between the two locking members 4, two ends of the elastic member 5 respectively abut against the two locking members 4, and the elastic member 5 can drive the two locking members 4 to move in directions away from each other and respectively insert into the positioning holes 11 of the two upper pull rods 1.

Specifically, as shown in fig. 4, when the upper pull rod 1 moves up and down, when the position of the positioning hole 11 on the upper pull rod 1 coincides with the positions of the first through hole 321 and the second through hole 21, the elastic member 5 drives the two locking members 4 to move respectively towards the left and right sides and to be inserted into the positioning holes 11 on the two upper pull rods 1, so as to realize automatic locking and fixing between the upper pull rod 1 and the lower pull rod 2; when needing the unblock, hold between the hand and pinch boss 41 on two locking pieces 4 and stir inwards, two locking pieces 4 move towards the direction that is close to each other this moment and break away from in the locating hole 11 on two upper draw bars 1 respectively, and elastic component 5 is compressed and is held up power to easily remove the locking between upper draw bar 1 and the lower draw bar 2, upper draw bar 1 can reciprocate again, and the user can loosen the hand after the unblock.

Further, lock piece 4 also can be provided with the strengthening rib for middle fretwork design and lock piece 4 to save material, increase of strength. As shown in fig. 4 to 7, in the present embodiment, the locking member 4 includes a second main body portion 42 and a latch portion 43 connected to each other, the latch portion 43 is located on a side of the second main body portion 42 away from the elastic member 5, a size of the latch portion 43 is smaller than a size of the second main body portion 42, and a step 44 is formed at a connection portion of the latch portion 43 and the second main body portion 42. The stop portion 33 is arranged in the cross bar 3, the stop portion 33 is located on one side of the second main body portion 42 away from the elastic member 5, and the step 44 can abut against the stop portion 33.

Specifically, since the lock member 4 is always under the elastic force of the elastic member 5, in order to prevent the lock member 4 from moving in a direction away from the elastic member 5 all the time, the stopper portion 33 is provided in the cross bar 3 to limit the movement of the lock member 4. Of course, in this embodiment, the protrusion 41 abuts against the inner wall of the through hole 34 to limit the movement of the locking member 4.

Further, as shown in fig. 5, in the present embodiment, the locking member 4 is provided with a protruding rod 45 at an end close to the elastic member 5, and the elastic member 5 is sleeved on the protruding rod 45, so as to prevent the elastic member 5 from falling off from the locking member 4.

Further, as shown in fig. 7, in the present embodiment, a buckle 35 is provided in the cross bar 3, and the lock member 4 is clamped in the buckle 35, so as to prevent the lock member 4 from falling off from the cross bar 3.

Further, as shown in fig. 3, in the present embodiment, the positioning hole 11 includes a first positioning hole 111 and a second positioning hole 112, the first positioning hole 111 and the second positioning hole 112 are respectively disposed at the upper end and the lower end of the upper pull rod 1, and the locking member 4 can be respectively inserted into the first positioning hole 111 and the second positioning hole 112.

Specifically, when the upper pull rod 1 is retracted downward, the upper pull rod 1 moves downward until the locking member 4 is inserted into the first positioning hole 111, and the retractable pull rod assembly is retracted (i.e. in the state shown in fig. 1), so as to be convenient to store; when the upper pull rod 1 extends upwards, the upper pull rod 1 moves upwards until the locking member 4 is inserted into the second positioning hole 112, and the telescopic pull rod assembly is in an extended state (i.e. the state shown in fig. 2), so that the telescopic pull rod assembly is convenient to pull and use.

According to the telescopic pull rod assembly provided by the embodiment of the utility model, through the mutual matching between the locking piece 4 and the elastic piece 5, the locking piece 4 can move under the driving of the elastic piece 5 and is inserted into the positioning hole 11 on the upper pull rod 1, so that the locking and fixing between the upper pull rod 1 and the lower pull rod 2 are realized; when the unlocking is needed, the unlocking can be easily realized only by pinching and stirring the convex part 41 on the locking piece 4 by hands to enable the locking piece 4 to move reversely. The telescopic pull rod assembly not only can simply and effectively realize locking and unlocking of the upper pull rod 1 and the lower pull rod 2, is good in operation hand feeling, stable and reliable in structure, capable of bearing heavy objects, small in number of parts and simple in structure, reduces assembly procedures and saves cost.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (8)

1. A telescopic pull rod assembly comprises an upper pull rod (1) and a lower pull rod (2), wherein the upper pull rod (1) is inserted into the lower pull rod (2) and can move up and down in the lower pull rod (2), the telescopic pull rod assembly is characterized by further comprising a cross rod (3), the cross rod (3) is fixedly connected with the lower pull rod (2), a locking piece (4) and an elastic piece (5) are arranged in the cross rod (3), the locking piece (4) can move in the cross rod (3), the elastic piece (5) is located on one side of the locking piece (4) and connected with the locking piece (4), and the locking piece (4) can move under the driving of the elastic piece (5) and can lock and fix the upper pull rod (1) and the lower pull rod (2); a positioning hole (11) is formed in the upper pull rod (1), the locking piece (4) can move under the driving of the elastic piece (5) and is inserted into the positioning hole (11), and a protruding part (41) used for shifting the locking piece (4) is arranged on the locking piece (4); through holes (34) are formed in the positions, corresponding to the protruding portions (41), of the cross rod (3), and the protruding portions (41) are exposed to the outside after penetrating through the through holes (34).

2. The retractable pull rod assembly of claim 1, wherein the positioning hole (11) comprises a first positioning hole (111) and a second positioning hole (112), the first positioning hole (111) and the second positioning hole (112) are respectively disposed at upper and lower ends of the upper pull rod (1), and the lock member (4) is respectively insertable into the first positioning hole (111) and the second positioning hole (112).

3. The telescopic handle assembly of claim 1, wherein the number of the upper handle (1) and the lower handle (2) is two, the two upper handles (1) are oppositely arranged, the two lower handles (2) are oppositely arranged, the two upper handles (1) are respectively inserted into the two lower handles (2), and two ends of the cross rod (3) are respectively connected with the two lower handles (2).

4. The telescopic pull rod assembly of claim 3, wherein the cross rod (3) comprises a first main body portion (31) and sleeving portions (32) arranged at two ends of the first main body portion (31), the sleeving portions (32) at two ends of the first main body portion (31) are respectively sleeved and fixed on the two lower pull rods (2), and the locking member (4) and the elastic member (5) are both arranged in the first main body portion (31).

5. The telescopic handle assembly of claim 3, further comprising a handle (6), wherein both ends of the handle (6) are fixedly connected to the tops of the two upper rods (1); the cross rod (3) is hollow in the middle, and an opening is formed in the bottom of the cross rod (3); the locking piece (4) is designed to be hollow in the middle, and reinforcing ribs are arranged on the locking piece (4).

6. The telescopic handle assembly of claim 1, wherein the number of the locking members (4) is two, the two locking members (4) are arranged oppositely, the elastic member (5) is clamped between the two locking members (4), two ends of the elastic member (5) respectively abut against the two locking members (4), and the elastic member (5) can drive the two locking members (4) to move in a direction away from each other.

7. The retractable draw bar assembly of claim 1, wherein the locking member (4) comprises a second main body portion (42) and a plug portion (43) connected to each other, the plug portion (43) is located on a side of the second main body portion (42) away from the elastic member (5), a step (44) is formed at a connection position of the plug portion (43) and the second main body portion (42), a stopping portion (33) is arranged in the cross bar (3), the stopping portion (33) is located on a side of the second main body portion (42) away from the elastic member (5), and the step (44) can abut against the stopping portion (33).

8. The retractable lever assembly of claim 1, wherein the locking member (4) has a protruding rod (45) at an end thereof adjacent to the resilient member (5), and the resilient member (5) is disposed around the protruding rod (45).

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