Pull rod assembly and tool box with same

Abstract

The utility model provides a pull rod assembly and a tool box with the same. The pull rod assembly comprises a sleeve, a moving rod member; a hollow cross beam; the limiting component is arranged in the hollow cross beam and comprises a first locking pin, and a first rack is arranged on the side, close to the second sleeve, of the limiting component; a second rack is arranged on the side, close to the first sleeve, of the second locking pin; the gear is arranged between the first rack and the second rack; one end of the elastic piece is fixed to the hollow cross beam, and the other end of the elastic piece is fixed to the end, close to the second sleeve, of the first locking pin; the unlocking shifting piece is arranged on the upper end face of the second locking pin and exposed out of the hollow cross beam through the opening. The unlocking mechanism is simple in structure, convenient to produce and assemble and convenient to unlock, the first locking pin and the second locking pin can slide oppositely under the driving of the gear only by shifting the unlocking shifting piece, and limiting and locking of the moving rod component are relieved.

Description

Technical Field

[0001] This utility model relates to the field of pull rod assembly technology, specifically to a pull rod assembly and a toolbox having the same. Background Technology

[0002] To improve the portability of cases or large portable items (such as toolboxes, suitcases, cosmetic cases, portable speakers, etc.), a retractable pull rod is usually added to the case, so that users can walk upright and pull the case behind them.

[0003] In existing technologies, pull rod assemblies typically include a first rod and a second rod that can retract into the first rod. To retract the second rod into the first rod, the user usually has to press a release button to release the locking mechanism. However, the current pull rod assemblies have complex locking mechanism designs with numerous parts, which is not conducive to production and assembly. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a pull rod assembly and a toolbox with it, which can solve the problems of complex structure and numerous parts of the limiting component in the prior art, which are not conducive to production and assembly.

[0005] To achieve the above and other objectives, this utility model is implemented through the following technical solution: As a first aspect, this utility model proposes a pull rod assembly, including a first sleeve and a second sleeve arranged in parallel; a movable rod member, telescopically installed inside the first sleeve and the second sleeve; a hollow crossbeam, fixed between the first sleeve and the second sleeve, with an opening on its upper end face; a limiting member, disposed inside the hollow crossbeam, including a first locking pin, with a first rack disposed on the side near the second sleeve; a second locking pin, with a second rack disposed on the side near the first sleeve; a gear, disposed between the first rack and the second rack; an elastic element, one end fixed to the hollow crossbeam, and the other end fixed to the end of the first locking pin near the second sleeve; and an unlocking paddle, disposed on the upper end face of the second locking pin, and exposed through the opening in the hollow crossbeam.

[0006] In one embodiment, the first locking pin and / or the second locking pin are Z-shaped components.

[0007] In one embodiment, the first locking pin has a first locking protrusion at one end near the first sleeve; the second locking pin has a second locking protrusion at one end near the second sleeve; the first locking protrusion and the second locking protrusion are located on the same horizontal plane.

[0008] In one embodiment, the first rack is located on the upper end face of the first locking pin, and the second rack is located on the lower end face of the second locking pin.

[0009] In one embodiment, the hollow beam includes a beam body for supporting the limiting member and a cover covering the beam body, the opening being disposed on the upper end surface of the cover.

[0010] In one embodiment, the beam body is provided with a gear frame for limiting the installation of the gear and a mounting groove for fixing the elastic element.

[0011] In one embodiment, a fixing piece is provided on the upper surface of the cover.

[0012] In one embodiment, a direction indicator is provided on the upper surface of the cover.

[0013] In one embodiment, the movable rod component includes a first movable rod and a second movable rod arranged in parallel, and a handle connecting the first movable rod and the second movable rod; the first movable rod and the second movable rod are respectively telescopically installed in the first sleeve and the second sleeve; the handle is offset away from the housing relative to the longitudinal axis of the first movable rod and the second movable rod.

[0014] As a second aspect, the present invention provides a toolbox including a lever assembly as described in the first aspect.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. The limiting component design of this utility model includes only a pair of locking pins, gears, elastic elements, and unlocking paddles. It has a simple structure, is easy to manufacture and assemble, and is convenient to operate. Simply by moving the unlocking paddle, the second locking pin can be moved, and under the action of the gears, the first and second locking pins slide opposite each other along their axial direction, releasing the limiting lock on the moving rod component and compressing the elastic element. When the unlocking paddle is released, the elastic element, under the action of elastic force, moves the first locking pin, and under the action of the gears, the first and second locking pins slide opposite each other along their axial direction to reset, thus achieving the limiting lock on the moving rod component.

[0017] 2. At least one of the first locking pin and the second locking pin of this utility model is designed as a Z-shaped component so that a space for installing a gear can be formed at the intersection of the racks of the first locking pin and the second locking pin, while ensuring that the first locking protrusion and the second locking protrusion are located on the same horizontal plane.

[0018] 3. The hollow crossbeam of this utility model, including the beam body and the cover, is designed to facilitate the installation of the limiting components;

[0019] 4. The gear frame design of this utility model can limit the gear installation in the beam body, preventing the gear from being moved away from its original position by the movement of the first locking pin and the second locking pin, thus causing the unlocking operation to fail.

[0020] 5. The fixing plate of this utility model is used in conjunction with the unlocking lever, which can be moved towards the fixing plate by pinching with two fingers, making the unlocking operation faster and easier; the direction indicator design can indicate the operating direction of the unlocking lever.

[0021] 6. In this utility model, the handle is offset away from the box body relative to the longitudinal axis of the first and second moving rods, which makes it convenient for the operator to drag the box body backward. Attached Figure Description

[0022] Figure 1 The diagram shown is a three-dimensional structural schematic of a tie rod assembly according to this utility model.

[0023] Figure 2 The diagram shown is a schematic diagram of the back of a pull rod assembly according to this utility model.

[0024] Figure 3 The diagram shown is an exploded view of the structure of a tie rod assembly according to this utility model.

[0025] Figure 4 This diagram shows the limiting component in the present invention in a locked state.

[0026] Figure 5 This diagram shows the limiting component in the present invention in the unlocked state.

[0027] Figure 6 The diagram shown is a schematic representation of the internal structure of the beam body in this utility model. Detailed Implementation

[0028] Please see Figures 1-6 The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0029] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0030] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “a,” “an,” or “the,” as used herein, do not indicate a limitation of quantity, but merely indicate the presence of at least one. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The numbering of components in this specification, such as “first,” “second,” etc., is solely for distinguishing the described objects and has no sequential or technical meaning. The term “connection” in this invention, unless otherwise specified, includes both direct and indirect connections.

[0031] To avoid confusion with this utility model, some technical features known in the art have not been described.

[0032] like Figure 1 As shown, this embodiment provides a pull rod assembly 100, including a pair of parallel sleeves (i.e., a first sleeve 110 and a second sleeve 120), a hollow crossbeam 130 fixed on the sleeves, a limiting member 140 disposed in the hollow crossbeam 130, and a movable rod member 150 telescopically installed in the sleeves.

[0033] Please combine Figure 2 The first sleeve 110 and the second sleeve 120 are arranged symmetrically on both sides. The following structural description only refers to the first sleeve 110, but it should be understood that the second sleeve 120 has the same structure and operates in the same way. The lower end of the first sleeve 110 is provided with a fixing hole 111. Usually, the box body is provided with fasteners that cooperate with the fixing hole 111. The first sleeve 110 is fixedly connected to the box body through the fixing hole 111 and the fasteners.

[0034] Please combine Figures 3-6 The hollow crossbeam 130 rigidly extends between the upper parts of the first sleeve 110 and the second sleeve 120, and includes a beam body 131 for supporting the limiting member 140 and a cover 132 covering the beam body 131. The beam body 131 and the cover 132 can be fixedly connected by screws, buckles, or other means. The beam body 131 is provided with a gear frame 1311 for limiting the installation of the gear 143 and an installation groove 1312 for fixing the installation of the elastic member 144. An opening 1321 is provided on the upper end surface of the cover 132 to expose the unlocking lever 145 of the limiting member 140, so as to enable the extension and retraction unlocking of the pull rod assembly 100 by touching and moving the unlocking lever 145.

[0035] Furthermore, to facilitate the operation of the unlocking lever 145, a fixing piece 1322 can be provided on the upper surface of the cover 132. This design allows the unlocking lever 145 to be moved towards the fixing piece 1322 by pinching with two fingers, making the operation quick and effortless. Furthermore, to indicate the operating direction of the unlocking lever 145, a direction indicator 1323 can be provided on the upper surface of the cover 132.

[0036] The limiting member 140 is disposed within the hollow crossbeam 130 and includes a first locking pin 141, a second locking pin 142, a gear 143, an elastic element 144, and an unlocking paddle 145. The first locking pin 141 and the second locking pin 142 are disposed within the beam body 131 and can slide and shift (i.e., move left and right) along the axial direction of the beam body 131. The first locking pin 141 has a first locking protrusion 1411 at one end near the first sleeve 110 for limiting and locking the moving rod member 150; the first locking pin 141 has a fixing seat 1412 at one end near the second sleeve 120 for fixing one end of the elastic element 144; the upper end surface of the first locking pin 141 near the second sleeve 120 has a first rack 1413 that meshes with the gear 143. The second locking pin 142 has a second locking protrusion 1421 at one end near the second sleeve 120 for limiting and locking the moving rod component 150; a second rack 1423 that meshes with the gear 143 is provided on the lower end face of the second locking pin 142 near the first sleeve 110. The gear 143 is limited and installed in the gear frame 1311 and is located between the first rack 1413 and the second rack 1423. The other end of the elastic member 144 is fixed to the groove wall of the mounting groove 1312. The unlocking paddle 145 is fixedly disposed on the upper end face of the second locking pin 142 and can be integrally formed with the second locking pin 142.

[0037] To ensure that the first locking protrusion 1411 and the second locking protrusion 1421 are located on the same horizontal plane, and that the intersection of the first locking pin 141 and the second locking pin 142 can form a space for installing the gear 143, the first locking pin 141 and the second locking pin 142 can be designed as Z-shaped components.

[0038] It should be noted that in this embodiment, the intersection of the first locking pin 141 and the second locking pin 142 is arranged vertically, so the first rack 1413 is located on the upper end face of the first locking pin 141, and the second rack 1423 is located on the lower end face of the second locking pin 142. However, in some embodiments, the intersection of the first locking pin 141 and the second locking pin 142 can be arranged front-to-back, in which case the first rack 1413 is located on the rear / front end face of the first locking pin 141, and the second rack 1423 is located on the front / rear end face of the second locking pin 142.

[0039] Please review Figure 3 The movable rod component 150 includes a first movable rod 151 and a second movable rod 152 arranged in parallel, and a handle 153 connecting the first movable rod 151 and the second movable rod 152. The first movable rod 151 and the second movable rod 152 are arranged symmetrically from left to right and are telescopically installed in the first sleeve 110 and the second sleeve 120, respectively. The first movable rod 151 and the second movable rod 152 have the same structure and operate in the same way. The following structural description refers only to the first movable rod 151. The upper inner side of the first moving rod 151 is provided with a first limiting hole 1511, and the lower inner side is provided with a second limiting hole 1512; the shapes of the first limiting hole 1511 and the second limiting hole 1512 match the shape of the locking protrusion 145; when the locking protrusion 145 extends into the first limiting hole 1511, the moving rod member 150 is limited to a fully retracted state; when the locking protrusion 145 extends into the second limiting hole 1512, the moving rod member 150 is limited to a fully extended state.

[0040] The handle 153 extends rigidly between the tops of the first moving rod 151 and the second moving rod 152. In this embodiment, the handle 153 is offset away from the housing relative to the longitudinal axis of the first moving rod 151 and the second moving rod 152 to facilitate sequential hand-held dragging by the operator.

[0041] In summary, the telescopic operation of the lever assembly 100 provided in this embodiment is as follows: When the movable lever member 150 is limited to a fully retracted state or a fully extended state and needs to be stretched or retracted, by moving the unlocking paddle 145, the second locking pin 142 is moved toward the first sleeve 110, causing the second locking protrusion 1421 to move out of the second movable lever 152 and the second sleeve 120; at the same time, the second rack 1423 moves toward the first sleeve 110 and drives the gear 143 to rotate in the gear frame 1311, thereby driving the first rack 1413 to move toward the second sleeve 120, causing the first locking protrusion 1411 to move out of the first movable lever 151 and the first sleeve 110 at the same time, thus unlocking the movable lever member 150. After unlocking, pulling upward or pressing downward on the handle 153 can stretch or retract the movable lever member 150; at this time, the elastic element 144 is in a compressed state.

[0042] For ease of operation, the handle 153 can usually be pulled upwards or pressed downwards while the unlocking lever 145 is toggled. After the pull or press occurs, the unlocking lever 145 is released. Upon release, the elastic element 144 extends and returns to its original position towards the first sleeve 110 under the action of elastic force, causing the first locking pin 141 to move towards the first sleeve 110, making the first locking protrusion 1411 tend to move into the first sleeve 110 through the through hole 112; simultaneously, the first rack 1413 drives the gear 143 in... The gear carrier 1311 rotates, thereby driving the second rack 1423 to move toward the second sleeve 120, causing the second locking protrusion 1421 to tend to move into the second sleeve 120 through the through hole 112; when the second limiting hole 1512 or the first limiting hole 1511 of the moving rod member 150 moves to the through hole 112, the first locking protrusion 1411 and the second locking protrusion 1421 then extend into the second limiting hole 1512 or the first limiting hole 1511, completing the limiting and locking of the moving rod member 150.

[0043] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A tie rod assembly, characterized in that, include The first and second sleeves are set in parallel. The movable rod component is telescopically installed inside the first sleeve and the second sleeve; A hollow crossbeam is fixed between the first sleeve and the second sleeve, and an opening is provided on its upper end face. The limiting component is disposed within the hollow crossbeam, including... The first locking pin has a first rack on the side near the second sleeve; The second locking pin has a second rack on the side near the first sleeve; A gear is disposed between the first rack and the second rack; The elastic element has one end fixed to the hollow crossbeam and the other end fixed to the end of the first locking pin near the second sleeve. The unlocking lever is located on the upper surface of the second locking pin and protrudes from the hollow crossbeam through the opening.

2. The tie rod assembly according to claim 1, characterized in that, The first locking pin and / or the second locking pin are Z-shaped components.

3. The tie rod assembly according to claim 2, characterized in that, The first locking pin has a first locking protrusion at one end near the first sleeve; the second locking pin has a second locking protrusion at one end near the second sleeve; the first locking protrusion and the second locking protrusion are located on the same horizontal plane.

4. The tie rod assembly according to claim 2 or 3, characterized in that, The first rack is located on the upper end face of the first locking pin, and the second rack is located on the lower end face of the second locking pin.

5. The tie rod assembly according to claim 1, characterized in that, The hollow beam includes a beam body for supporting the limiting member and a cover covering the beam body, with the opening located on the upper end surface of the cover.

6. The tie rod assembly according to claim 5, characterized in that, The beam body is provided with a gear frame for limiting the installation of the gear and a mounting groove for fixing the elastic element.

7. The tie rod assembly according to claim 5, characterized in that, A fixing piece is provided on the upper surface of the cover.

8. The tie rod assembly according to claim 5, characterized in that, A direction indicator is provided on the upper surface of the cover.

9. The tie rod assembly according to claim 1, characterized in that, The movable rod component includes a first movable rod and a second movable rod arranged in parallel, and a handle connecting the first movable rod and the second movable rod; the first movable rod and the second movable rod are respectively telescopically installed in the first sleeve and the second sleeve; the handle is offset away from the housing relative to the longitudinal axis of the first movable rod and the second movable rod.

10. A toolbox, characterized in that, Includes the tie rod assembly as described in any one of claims 1 to 9.

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