Pull rod assembly and tool box

Abstract

The utility model provides a pull rod assembly and a tool box. The pull rod assembly comprises a first sleeve and a second sleeve which are arranged in parallel. The moving rod component is telescopically mounted in the first sleeve and the second sleeve; the hollow cross beam is fixed between the first sleeve and the second sleeve, and an opening is formed in the upper end face of the hollow cross beam; the limiting component is arranged in the hollow cross beam, comprises an unlocking key and is exposed out of the hollow cross beam through the opening; the torsion spring is fixed in the unlocking key and comprises a first torsion spring arm and a second torsion spring arm; and the first locking pin and the second locking pin are fixedly connected with the first torsion spring arm and the second torsion spring arm of the torsion spring respectively. The unlocking mechanism is simple in structure and convenient to produce and assemble, unlocking operation is convenient, the first locking pin and the second locking pin can oppositely slide and move under the driving of the torsion spring only by pressing down the unlocking key, and limiting locking of the moving rod component is relieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pull rod assembly technical field, specifically to a pull rod assembly and tool box. BACKGROUND

[0002] In order to improve the portable of the box or large movable goods (for example, tool box, luggage, cosmetic box, mobile sound, etc.), usually add the telescopic pull rod assembly on the luggage, so that the user can walk straight and pull the luggage behind.

[0003] In the prior art, the pull rod assembly usually includes a first rod and a second rod that can be telescoped into the first rod, in order to shrink the second rod into the first rod, the user usually has to press the release button to release the limiting member in the locked state. But the existing pull rod assembly design is more complex, and the number of parts is large, which is not conducive to production and assembly. SUMMARY

[0004] The utility model aims at overcoming the defects of prior art, provides a kind of pull rod assembly and tool box, can solve the problem of complex structure of limiting member in prior art, many parts, not conducive to production and assembly.

[0005] In order to achieve the above object and other objects, the utility model is realized by including the following technical scheme: as the first aspect, the utility model provides a kind of pull rod assembly, including parallelly arranged first sleeve and second sleeve;Movable rod component, can be telescoped in the first sleeve and second sleeve;Hollow crossbeam is fixed between the first sleeve and the second sleeve, and the upper end face is provided with opening;Limiting member is arranged in the hollow crossbeam, including unlocking key, and is exposed to the hollow crossbeam through the opening;Torsion spring is fixed in the unlocking key, including first torsion spring arm and second torsion spring arm, and the first torsion spring arm and the second torsion spring arm are respectively arranged towards the second sleeve and the first sleeve;First locking pin and second locking pin are fixedly connected with the first torsion spring arm and the second torsion spring arm of the torsion spring respectively.

[0006] In an embodiment, the first locking pin / second locking pin includes a locking protrusion and a torsion spring arm mounting groove;The torsion spring arm mounting groove is arranged on the upper end face away from the locking protrusion side, for fixedly installing the first torsion spring arm / second torsion spring arm.

[0007] In an embodiment, the middle section of the first locking pin / second locking pin is provided with a limiting step for limiting the displacement of the second locking pin / first locking pin.

[0008] In an embodiment, the first locking pin / second locking pin is a Z-shaped member to form the limiting step.

[0009] In an embodiment, the moving rod member comprises a first moving rod and a second moving rod arranged in parallel, and a handle connecting the first moving rod and the second moving rod; the first moving rod and the second moving rod are respectively telescopically installed in the first sleeve and the second sleeve; the handle is offset relative to the longitudinal axes of the first moving rod and the second moving rod in a direction away from the box body.

[0010] In an embodiment, a first limiting hole is arranged on the upper inner side of the first / second moving rod, and a second limiting hole is arranged on the lower inner side of the first / second moving rod; the shapes of the first limiting hole and the second limiting hole match the shape of the locking protrusion.

[0011] In an embodiment, the unlocking button is in a strip shape, and an installation groove is arranged on the inner side of the unlocking button for installing the torsion spring.

[0012] In an embodiment, the hollow cross beam comprises a beam body for bearing the limiting member and a cover arranged on the beam body, and the opening is arranged on the upper end face of the cover.

[0013] In an embodiment, the lower ends of the first sleeve and the second sleeve are respectively provided with fixing holes for cooperating with fasteners on the box body.

[0014] As a second aspect, the utility model provides a tool box which comprises the pull rod assembly of the first aspect.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] 1. The limiting member of the utility model only comprises an unlocking button, a torsion spring and a pair of locking pins, and has a simple structure, is convenient to produce and assemble, and is convenient to operate; by only pressing the unlocking button, the first torsion spring arm and the second torsion spring arm can be deformed and opened under the pressure, thereby driving the first locking pin and the second locking pin to slide and displace in the axial direction and release the limiting locking of the moving rod member; by releasing the unlocking button, the first torsion spring arm and the second torsion spring arm drive the first locking pin and the second locking pin to slide and reset in the opposite axial direction under the elastic force, thereby realizing the limiting locking of the moving rod member.

[0017] 2. The locking protrusion arranged on the locking pin in the utility model can increase the locking strength of the pin body on the moving rod member; the torsion spring arm installation groove arranged on the locking pin can facilitate the installation and fixation of the torsion spring arm.

[0018] 3. The limiting step designed on the locking pin in the utility model can be used for limiting the displacement of the other locking pin, and can avoid excessive deformation of the torsion spring.

[0019] 4、The locking pin is designed as Z-shaped, can conveniently form a limiting step in the middle section of the locking pin, and can ensure that the thickness of the two end pin bodies reaches the required strength;

[0020] 5、The handle is offset relative to the longitudinal axis of the first moving rod and the second moving rod in the direction away from the box body, which can conveniently drag the box body backward by the operator;

[0021] 6、The hollow beam comprises a beam body and a cover, and the design can conveniently install the limiting member. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A perspective structural schematic view of a pull rod assembly of the utility model is shown.

[0023] Figure 2 A back view schematic view of a pull rod assembly of the utility model is shown.

[0024] Figure 3 An exploded view of a pull rod assembly of the utility model is shown (the limiting member is in a locked state).

[0025] Figure 4 An exploded view of a pull rod assembly of the utility model is shown (the limiting member is in a locked state).

[0026] Figure 5 An inside structure schematic view of an unlocking button of the utility model is shown. DETAILED DESCRIPTION

[0027] Please refer to Figures 1-5 The embodiments of the utility model are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification.

[0028] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not define the limiting conditions for the implementation of the utility model, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0029] Unless otherwise defined, technical terms or scientific terms used herein have the same meaning as is commonly understood by one of ordinary skill in the art to which this application belongs. As used herein, the articles "a", "an" and "the" are intended to mean that there is at least one of the particular element. The terms "including" and "comprising" are used herein to mean that existing features can be present, but not excluded, and that additional features can be present. The terms "first", "second", and the like, as used herein do not have any sequence or technical meaning. The term "connect" or "connected" as used herein, unless otherwise specified, means that the elements connected directly and indirectly.

[0030] In order to avoid confusion with the present application, some technical features known in the art are not described.

[0031] As shown in Figure 1 , the present embodiment provides a pull rod assembly 100, comprising a pair of parallel arranged sleeves (i.e. a first sleeve 110 and a second sleeve 120), a hollow cross beam 130 fixed on the sleeves, a limiting member 140 arranged in the hollow cross beam 130, and a movable rod member 150 telescopically installed in the sleeves.

[0032] Please refer to Figure 2 , the first sleeve 110 and the second sleeve 120 are symmetrically arranged, and only the first sleeve 110 will be described below, but it should be understood that the second sleeve 120 has the same structure and operates the same. The lower end of the first sleeve 110 is provided with a fixing hole 111, and the box body is usually provided with a fastener matched with the fixing hole 111, and the first sleeve 110 is fixedly connected with the box body through the fixing hole 111 and the fastener.

[0033] Please refer to Figure 3 , the hollow cross beam 130 extends rigidly between the upper portions of the first sleeve 110 and the second sleeve 120, and includes a beam body 131 for carrying the limiting member 140 and a cover 132 covering the beam body 131, and the beam body 131 and the cover 132 can be fixedly connected by screws, buckles or the like. An opening 1321 is formed on the upper end face of the cover 132, for exposing the unlocking button 144 of the limiting member 140, so as to achieve the purpose of touching and pressing the unlocking button 144 to unlock the pull rod assembly.

[0034] Please refer to Figure 3 and Figure 4The limiting member 140 is arranged in the hollow beam 130 and comprises a first locking pin 141, a second locking pin 142, a torsion spring 143 and an unlocking button 144. The first locking pin 141 and the second locking pin 142 are arranged in the beam body 131 and can be slidably displaced along the axial direction (i.e. left and right movement). The first locking pin 141 and the second locking pin 142 have the same structure and operate in the same way, and only the first locking pin 141 will be described below. The first locking pin 141 comprises a locking protrusion 1411, a torsion spring arm mounting groove 1412 and a limiting step 1413. The locking protrusion 1411 is arranged on one side close to the first sleeve 110. The torsion spring arm mounting groove 1412 is arranged on the upper end face away from the locking protrusion 1411, and is used to fixedly mount the first torsion spring arm 1431 of the torsion spring 143. The limiting step 1413 is arranged on the middle section of the first locking pin 141, and is used to limit the displacement of the second locking pin 142. Specifically, the first locking pin 141 can be designed as a Z-shaped member to form the limiting step 1413. The first torsion spring arm 1431 of the torsion spring 143 is inclined towards the second locking pin 142, and the second torsion spring arm 1432 of the torsion spring 143 is inclined towards the first locking pin 141. Please refer to Figure 5 The unlocking button 144 is in the shape of a long strip, and an installation groove 1441 is arranged on the inner side of the unlocking button 144, which is used to mount the body of the torsion spring 143.

[0035] Please refer to Figure 3 The moving rod member 150 comprises a first moving rod 151 and a second moving rod 152 arranged in parallel, and a handle 153 connecting the first moving rod 151 and the second moving rod 152. The first moving rod 151 and the second moving rod 152 are arranged symmetrically left and right, and are respectively telescopically mounted in the first sleeve 110 and the second sleeve 120. The first moving rod 151 and the second moving rod 152 have the same structure and operate in the same way, and only the first moving rod 151 will be described below. The first moving rod 151 is provided with a first limiting hole 1511 on the inner side of the upper part, and a second limiting hole 1512 on the inner side of the lower part. The shapes of the first limiting hole 1511 and the second limiting hole 1512 match the shape of the locking protrusion 1411. When the locking protrusion 1411 extends into the first limiting hole 1511, the moving rod member 150 is limited in the fully contracted state. When the locking protrusion 1411 extends into the second limiting hole 1512, the moving rod member 150 is limited in the fully stretched state.

[0036] The handle 153 rigidly extends between the top of the first and second moving rods 151, 152. In the present embodiment, the handle 153 is offset relative to the longitudinal axis of the first and second moving rods 151, 152 in a direction away from the box to facilitate hand-held dragging by an operator.

[0037] In summary, the telescopic operation of the pull rod assembly 100 is achieved as follows: when the moving rod member 150 needs to be stretched or retracted from the fully retracted state or the fully stretched state, the first and second torsion spring arms 1431, 1432 of the torsion spring 143 are deformed to open to both sides under pressure, thereby driving the first and second locking pins 141, 142 to move towards each other, moving the locking protrusions 1411 of the first and second locking pins 141, 142 out of the first and second moving rods 151, 152, and out of the first and second sleeves 110, 120 through the through holes 112 in the first and second sleeves 110, 120, thereby unlocking the moving rod member 150. After unlocking, the handle 153 can be pulled up or pressed down to stretch or retract the moving rod member 150. To facilitate operation, the handle 153 can usually be pulled up or pressed down at the same time as the unlocking button 144 is pressed down, and the unlocking button 144 can be released after pulling or pressing. The first and second torsion spring arms 1431, 1432 of the torsion spring 143 are inwardly retracted under the action of the elastic force to restore the original state, driving the first and second locking pins 141, 142 to move away from each other, so that the locking protrusions 1411 of the first and second locking pins 141, 142 have a tendency to move into the first and second sleeves 110, 120 through the through holes 112 in the first and second sleeves 110, 120. When the second or first limiting hole 1512, 1511 of the moving rod member 150 moves to the through hole 112, the locking protrusion 1411 extends into the second or first limiting hole 1512, 1511, thereby limiting and locking the moving rod member 150.

[0038] Therefore, the present application effectively overcomes the shortcomings of the prior art and has high industrial utilization value. The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not intended to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed by the present application should be covered by the claims of the present application.

Claims

1. A drawbar assembly characterized by, Comprising a first sleeve and a second sleeve arranged in parallel; a movable rod member telescopically installed in the first sleeve and the second sleeve; a hollow crossbeam fixed between the first sleeve and the second sleeve, and having an opening formed on an upper end surface thereof; a limiting member arranged in the hollow crossbeam, comprising an unlocking button exposed to the hollow crossbeam through the opening; a torsion spring fixed in the unlocking button, comprising a first torsion spring arm and a second torsion spring arm, the first torsion spring arm and the second torsion spring arm being arranged towards the second sleeve and the first sleeve respectively; a first locking pin and a second locking pin fixedly connected with the first torsion spring arm and the second torsion spring arm of the torsion spring respectively.

2. The pull rod assembly of claim 1, wherein, The first / second locking pin comprises a locking protrusion and a torsion spring arm mounting groove; the torsion spring arm mounting groove is arranged on the upper end surface away from the locking protrusion, and is used for fixedly mounting the first / second torsion spring arm.

3. The pull rod assembly of claim 2, wherein, A limiting step is arranged on the middle section of the first / second locking pin, and is used for limiting the displacement of the second / first locking pin.

4. The pull rod assembly of claim 3, wherein, The first / second locking pin is a Z-shaped member, so as to form the limiting step.

5. The pull rod assembly of claim 2, wherein, The movable rod member comprises a first movable rod and a second movable rod arranged in parallel, and a handle connected with the first movable rod and the second movable rod; the first movable rod and the second movable rod are telescopically installed in the first sleeve and the second sleeve respectively; the handle is offset relative to the longitudinal axis of the first movable rod and the second movable rod, and is offset away from the box body.

6. The pull rod assembly of claim 5, wherein, A first limiting hole is arranged on the upper inner side of the first / second movable rod, and a second limiting hole is arranged on the lower inner side; the shapes of the first limiting hole and the second limiting hole are matched with the shape of the locking protrusion.

7. The pull rod assembly of claim 1, wherein, The unlocking button is in a strip shape, and has an inner mounting groove arranged therein, and is used for mounting the torsion spring.

8. The pull rod assembly of claim 1, wherein, The hollow crossbeam comprises a beam body for bearing the limiting member, and a cover arranged on the beam body; the opening is arranged on the upper end surface of the cover.

9. The pull rod assembly of claim 1, wherein, The lower end of the first sleeve and the second sleeve is provided with a fixing hole, and is fixed with a fastener on the box body.

10. A kit characterized in that, The pull rod assembly comprises the pull rod assembly according to any one of claims 1 to 9. The pull rod assembly comprises the pull rod assembly according to any one of claims 1 to 9.

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