CN214904399U - Pull rod and draw-bar box - Google Patents

Abstract

The utility model discloses a draw bar and draw-bar box, including draw bar, box and at least one locking mechanism, the draw bar includes first telescopic link, second telescopic link and handle, the lockpin device that the handle both ends connect respectively this first telescopic link and this second telescopic link and be equipped with the locking mechanism, the handle has stretching out position and condensation position according to the different states that this first telescopic link and this second telescopic link stretch out or condense from this box; the locking mechanism comprises a lock pin device and a locking piece, the locking piece is fixedly arranged on the box body, and the lock pin device is arranged on the handle and matched with the locking piece. When the handle is in the retracted position, the detent mechanism locks into the lock member, and when the handle is in the extended position, the detent mechanism disengages from the lock member. The utility model discloses can avoid setting up the damage phenomenon such as deformation that pops out and cause such as draw-bar box or equipment box in the fall that delivery or other scenes appear of pull rod.

Description

Pull rod and draw-bar box

Technical Field

The utility model relates to a flexible pull rod application, concretely relates to pull rod and draw-bar box.

Background

The draw-bar box is the indispensable instrument of our daily trip, and current draw-bar box is generally that the pull rod is installed on the box, and the pull rod can stretch out the box and drag the box motion, and the pull rod also can contract in the box when needing the delivery, however at the in-process of normal delivery, when the draw-bar box meets the striking or falls, the pull rod often pops out and causes the box to damage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pull rod and draw-bar box to solve the at least partial problem that exists among the above-mentioned prior art.

In order to solve the above problems, according to an aspect of the present invention, there is provided a pull rod, comprising a first telescopic rod, a second telescopic rod and a handle, wherein two ends of the handle are respectively connected to a lock pin device of the first telescopic rod and the second telescopic rod, the lock pin device is provided with a locking mechanism, and the handle has an extended position and a retracted position according to different states of the first telescopic rod and the second telescopic rod; the locking mechanism comprises a lock pin device and a locking piece, the locking piece is fixedly arranged on equipment such as a box body, and the lock pin device is arranged on the handle and is matched with the locking piece; the handle is in the retracted position, the detent mechanism locks into the lock, the handle is in the extended position, and the detent mechanism disengages from the lock.

In one embodiment, the latch mechanism further includes a driving member, the latch device includes a latch member and a reset member, the reset member is engaged with the latch member and drives the latch member to move toward the latch member, and the driving member is engaged with the latch member and drives the latch member to move away from the latch member.

In one embodiment, the locking mechanism further comprises a control member, and the control member is arranged on the handle and is matched with the driving member to drive the driving member to move.

In one embodiment, the handle includes a base and a cover, the cover cooperates with the base to form a receiving space, the driving member is installed in the receiving space, the base is provided with at least one installation groove, and the reset member and the latch member are movably installed in the installation groove.

In one embodiment, the latch member includes a locking tongue and a guide post, the guide post is installed in the installation groove and engaged with the driving member, and the locking tongue extends in a direction perpendicular to the guide post and is engaged with the locking member.

In one embodiment, the bottom of the mounting groove is further provided with a locking hole, the upper end of the locking member is provided with a clamping portion, the clamping portion is matched with the locking hole and can movably extend into the locking hole, and the lower end or the side portion of the locking member is provided with a locking hole matched with the lock tongue.

In one embodiment, the engaging portion is provided with a guide surface, and the latch tongue of the latch member is provided with an inclined surface engaged with the guide surface.

In one embodiment, the locking mechanism further comprises a guide plate for movably mounting the locking pin member in the mounting groove, wherein the guide plate is provided with a guide groove, and the guide post penetrates into the guide groove and can move along the guide groove.

In one embodiment, the driving member is provided with at least one driving groove, the guide post is movably connected to the driving groove, and one side wall of the driving groove is used for pushing the guide post to move.

In one embodiment, the drive member is provided with at least one first drive surface and the control member is provided with at least one sliding surface cooperating with the first drive surface.

In one embodiment, the driving member includes a first driving rod and a second driving rod, and the pull rod is provided with two of the locking pin devices, and the first driving rod and the second driving rod are respectively matched with the two locking pin devices and are respectively provided with one of the driving grooves.

In one embodiment, one end of the first drive rod engages the first telescoping rod and the other end of the first drive rod provides the first drive surface, and one end of the second drive rod engages the second telescoping rod and the other end of the second drive rod provides the second drive surface.

In one embodiment, the control member comprises a holding part and at least one pushing part, the upper end of the pushing part is fixedly connected with the holding part, and the lower end of the pushing part forms a sliding surface matched with at least the first driving surface; preferably, one of the pushing portions forms two sliding surfaces, and the two sliding surfaces are respectively matched with the driving surface of the first driving rod and the driving surface of the second driving rod.

In one embodiment, a first pushing portion and a second pushing portion are disposed at the bottom of the holding portion, and two ends of the first pushing portion and the second pushing portion are respectively provided with an inclined sliding surface and are respectively matched with the first driving surface of the first driving rod and the first driving surface of the second driving rod.

In one embodiment, the first driving rod is further provided with a first opening, the second driving rod is further provided with a second opening, a second driving surface is further respectively provided in the first opening and the second opening, the second driving surface in the first opening of the first driving rod and the first driving surface of the second driving rod are matched with two sliding surfaces of one pushing portion, and the second driving surface in the second opening of the second driving rod and the first driving surface of the first driving rod are matched with two sliding surfaces of the other pushing portion.

According to the utility model discloses an on the other hand still provides a draw-bar box, draw-bar box includes box and foretell pull rod and locking mechanism, set up on the box the locking piece, first telescopic link with the second telescopic link telescopically install in on the box.

The utility model discloses under the prerequisite that does not change pull rod basic function, increase mechanical locking structure in inside, in the action that the pull rod normally resets and withdraws, embedding mechanical locking mechanism locks the handle of pull rod on equipment such as the box, and then avoids its falling that appears in delivery or other scenes to pop out and be higher than the damage phenomenon such as the equipment surface that causes deformation such as case face, and its structural style is simple and does not increase the loaded down with trivial details extra operation of user.

Drawings

Fig. 1 is a perspective view of a draw-bar box according to an embodiment of the present invention.

Fig. 2 is a partially exploded view of the draw-bar box of fig. 1.

Fig. 3 is an enlarged view of a portion a of fig. 2.

Fig. 4 is a perspective view of a control member according to an embodiment of the present invention.

Fig. 5 is a perspective view of a drive member according to an embodiment of the present invention.

Fig. 6 is an assembly view of a control member and a driving member according to an embodiment of the present invention.

Fig. 7 is a cross-sectional view of a draw-bar box according to an embodiment of the present invention.

Fig. 8 is an enlarged view of a portion B of fig. 7.

Fig. 9 is a perspective view of a slot guide plate according to an embodiment of the present invention.

Fig. 10 is a perspective view of a detent arrangement according to an embodiment of the present invention.

Fig. 11 is a perspective view of a locking member according to an embodiment of the present invention.

100, a draw-bar box; 1. a pull rod; 2. a box body; 3. a locking mechanism; 11. a handle; 21. a groove; 111. a cover body; 112. a base; 12. a first telescopic rod; 13. a second telescopic rod; 31. A locking pin arrangement; 32. a locking member; 33. a drive member; 34. a control member; 311. a locking pin member; 312. a reset member; 3111. a base; 3112. a latch bolt; 3113. a guide post; 3114. moving the surface; 321. a fastening part; 3211. a guide surface; 322. a lock tongue hole; 331. a first drive lever; 332. a second drive lever; 3311. A first driving section; 3312. a first end face; 3321. a second driving section; 3322. a second end face; 333. Spacing; 341. a pushing part; 342. a grip portion; 3411. a first sliding surface; 3412. a second sliding surface; 3413. pushing the surface; 334. a drive slot; 3341. a drive face; 1121. mounting grooves; 1122. a locking hole; 11221. the outlet of the locking hole; 11222. the outlet of the locking hole; 35. a guide groove plate; 351. a guide groove; 3511. a guide groove; 3512. an engaging groove.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the sake of clarity, the structure and operation of the present invention will be described with the aid of directional terms, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be understood as words of convenience and not as words of limitation.

An aspect of the utility model relates to a pull rod, this pull rod include first telescopic link, second telescopic link and handle, and first telescopic link and second telescopic link are connected respectively and are equipped with locking mechanism's lockpin device to the handle both ends, and lockpin device cooperates with locking mechanism's locking piece, the handle according to first telescopic link with the different states of second telescopic link have stretching out position and condensation position. The detent mechanism locks into the detent when the handle is in the retracted position and disengages from the detent when the handle is in the extended position.

The utility model discloses another aspect still relates to a draw-bar box, and this draw-bar box includes pull rod, box and at least one locking mechanical system. The pull rod comprises a first telescopic rod, a second telescopic rod and a handle. The two ends of the handle are respectively connected with the first telescopic rod and the second telescopic rod, and the handle has an extending position and a condensing position according to different extending or condensing states of the first telescopic rod and the second telescopic rod from the box body. The locking mechanism comprises a lock pin device and a locking piece, the locking piece is fixedly arranged on the box body, and the lock pin device is arranged on the handle and matched with the locking piece. When the handle is in the retracted position, the detent mechanism locks into the detent member, and when the handle is in the extended position, the detent mechanism disengages the detent member. The utility model discloses under the prerequisite that does not change pull rod basic function, increase mechanical locking structure in inside, in the action that the pull rod normally resets and withdraws, embedding mechanical locking mechanism locks the handle of pull rod on the box, and then avoids its falling that appears in delivery or other scenes to pop out and be higher than the damage phenomena such as the case face causes deformation, and its structural style is simple and does not increase the loaded down with trivial details extra operation of user.

Embodiments of the draw-bar box of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a perspective view of a draw-bar box 100 according to an embodiment of the present invention, fig. 2 is a partially exploded perspective view of the draw-bar box 100 of fig. 1, and fig. 3 is an enlarged view of a portion a of fig. 2. as shown in fig. 1 to 3, the draw-bar box 100 includes a draw-bar 1, a box body 2, and a locking mechanism 3. The pull rod 1 is arranged on the box body 2 and can extend out of and contract from the box body 2, and the locking mechanism 3 is arranged on the pull rod 1 and the box body 2 and is used for locking the pull rod 1 and the box body 2 mutually.

Specifically, as shown in fig. 2 to 3, the pull rod 1 includes a first telescopic rod 12, a second telescopic rod 13 and a handle 11, and two ends of the handle 11 are respectively connected to the first telescopic rod 12 and the second telescopic rod 13. A groove 21 is formed in the middle of the top of the case 2, and the handle 11 can be inserted into the groove 21 and has an extended position and a retracted position according to the state that the draw bar 1 is extended from the case 2. The locking mechanism 3 comprises a lock pin device 31, a locking piece 32, a driving piece 33 and a control piece 34, wherein the locking piece 32 is fixedly arranged in the groove 21 at the top of the box body 2, and the driving piece 33, the lock pin device 31 and the control piece 34 are arranged on the handle 11. When the pull rod 1 is not pulled out, the handle 11 is embedded into the groove 21, the handle 11 is located at the condensation position, the lock pin device 31 is locked into the lock piece 32, the pull rod 1 and the box body 2 are mutually locked, the whole pull rod box 100 is simple in appearance, meanwhile, the pull rod is not prone to being mistakenly popped out, and the pull rod is not prone to being damaged in the process of consignment and transportation. When the draw bar 1 is extended from the box body 2, the handle 11 is in the extended position, the detent mechanism 31 is disengaged from the detent member 32, and the handle 11 is unlocked from the box body 2.

It should be noted that in other embodiments, the locking mechanism may include only the detent mechanism and the blocking member, and the locking mechanism may be unlocked by directly operating the detent mechanism in cooperation with the blocking member.

With continued reference to fig. 3, the handle 11 includes a cover 111 and a base 112, the cover 111 covers the base 112 and forms a certain accommodating space to accommodate the driving part 33 and the locking pin device 31 of the locking mechanism 3, the locking pin device 31 is installed on the base 112, the driving part 33 is installed between the base 112 and the cover 111 and includes a first driving rod 331 and a second driving rod 332, and the first driving rod 331 and the second driving rod 332 can move left and right within a certain range to drive the locking pin device to move. The first driving rod 331 cooperates with the first telescopic rod 12 and controls the movement of the first telescopic rod 12, and the second driving rod 332 cooperates with the second telescopic rod 13 and controls the movement of the second telescopic rod 13. The control member 34 is disposed on the cover 111 and cooperates with the driving member 33 to control the driving member 33. Specifically, the control member 34 is disposed at the middle portion of the cover 111 to be conveniently engaged with the first driving rod 331 and the second driving rod 332 of the driving member 33 at the same time, so that the first telescopic rod 12 and the second telescopic rod 13 are driven to operate by the first driving rod 331 and the second driving rod 332.

Fig. 4 is a perspective view of the control member 34 according to an embodiment of the present invention, and referring to fig. 4 in combination with fig. 8, the control member 34 includes a holding portion 342 and at least one pushing portion 341, and preferably, the holding portion 342 and the pushing portion 341 are integrally formed. The holding portion 342 is mounted on the cover 111, and specifically, the cover 111 has a holding portion mounting groove 1121, the upper end of the holding portion mounting groove 1121 is open, and the holding portion 342 is movably mounted in the holding portion mounting groove 1121. The pushing portion 341 is fixedly connected to the holding portion 342 at its upper end and contacts the driving member 33 at its lower end. The pushing portion 341 gradually increases from bottom to top to form a trapezoid and forms a first sliding surface 3411 and a second sliding surface 3412 with opposite inclination angles on two sides, respectively, and the first sliding surface 3411 and the second sliding surface 3412 are used for matching with a driving surface of the driver 33, which will be described in detail later.

In the embodiment shown in fig. 4, the pushing portions 341 are provided in two, the two pushing portions 341 are similar in shape and are formed in a trapezoidal shape as a whole, and a cylinder 3413 is further provided between the two pushing portions 341. However, it should be noted that in other embodiments, the pushing portion 341 may be provided as only one, for example, two pushing portions 341 shown in fig. 4 are combined into one, that is, the two pushing portions 341 are connected into a whole without a gap-provided cylinder 3413 in between.

Fig. 5 is a perspective view of the driving member 33 according to an embodiment of the present invention, and fig. 6 is a schematic view showing the engagement of the control member 34 with the driving member 33. As shown in fig. 5-6 in conjunction with fig. 3, one end of the first driving rod 331 is engaged with the first telescopic rod 12, the other end of the first driving rod 33 is provided with a first driving surface 3311, one end of the second driving rod 332 is engaged with the second telescopic rod 13, the other end of the second driving rod 332 is provided with a first driving surface 3311, and the first driving surface 3311 is used for being engaged with the first sliding surface 3411 or the second sliding surface 3412 of the control member 34.

In the embodiment shown in fig. 5, the first driving rod 331 is further provided with a first opening 333, the second driving rod is further provided with a second opening 3313, one second driving surface 3321 is further provided in each of the first opening 3313 and the second opening 3314, the second driving surface 3321 of the first driving rod 331 and the first driving surface 3311 of the second driving rod 332 cooperate with the first sliding surface 3411 and the second sliding surface 3412 of one of the pushing portions of the control member 34, and the second driving surface 3321 of the second driving rod 332 and the first driving surface 3311 of the first driving rod 331 cooperate with the first sliding surface 3411 and the second sliding surface 3412 of the other pushing portion of the control member 34. When unlocking, the grip portion 342 of the control member 34 is pressed, and the first sliding surface 3411 and the second sliding surface 3412 thereof are driven to move downwards and drive the first driving rod 331 and the second driving rod 332 to move outwards by cooperating with the first driving surface 3311 and the second driving surface 3321, so as to drive the locking pin device to move for unlocking.

Although the above-mentioned embodiment describes that the first driving rod 331 and the second driving rod 332 are provided with the first driving surface and the second driving surface, it should be noted that, in another embodiment, the first driving rod 331 and the second driving rod 332 may be provided with only one first driving surface 3311 at the end, and the control member 34 may be provided with only one pushing portion 341 and respectively engaged with the first driving surface 3311 of the first driving rod 331 and the first driving surface 3311 of the second driving rod 332 by using sliding surfaces formed at both sides of the one pushing portion 341, and drive the first driving rod 331 and the second driving rod 332 to move left and right respectively when the control member 34 moves downward, so as to drive the corresponding latch device to move.

Fig. 7 is a sectional view of a draw-bar box according to an embodiment of the present invention, fig. 8 is an enlarged view of a portion B of fig. 7, and referring to fig. 7 and 8, the base 112 is provided with at least one mounting groove 1121 for mounting the latch device 31, a vertically downward locking hole 1122 is provided at the bottom of the mounting groove 1121, and the locking hole 1122 is a through hole. The locking hole 1122 is connected to the mounting groove 1121 and is located at one side of the bottom of the mounting groove 1121. It will be appreciated that the latch aperture 1122 may be sized and shaped substantially identical to the latch member 32, or that the latch aperture 1122 may be slightly larger than the latch member 32 to facilitate entry of the latch member 32 into the latch aperture 1122.

The latch mechanism 31 of an embodiment of the present invention will now be described with continued reference to fig. 7-8. As shown in fig. 7 to 8, the latch means 31 includes a latch member 311 and a restoring member 312 and are installed in the handle 11 of the drawbar 1. Specifically, reset element 312 and latch element 311 are mounted within mounting slot 1121 of base 112, with one end of reset element 312 abutting one side of mounting slot 1121 and the other end of reset element 312 abutting latch element 311. The rear end of lock pin piece 311 is connected piece 312 that resets, and the front end of lock pin piece 311 sets up spring bolt 3112, and lock piece 32 is equipped with lockhole 1122 with spring bolt 3112 complex, and when piece 312 that resets is in natural state, spring bolt 3112 can stretch into lockhole 1122 and lock.

It is understood that in another embodiment, reset element 312 may not be directly connected to latch element 311, and reset element 312 only needs to be able to apply a pushing force to latch element 311, for example, one end of reset element 312 is connected to the side wall of mounting slot 1121 away from latch hole 1122, and the other end of reset element 312 applies a pushing force to latch element 311 toward latch hole 1122 through a slider-like device.

The locking hole 1122 may be disposed at the left side or the right side of the bottom of the mounting groove 1121, for example, the guiding post 3113 of the locking pin 311 is installed in the driving groove 334 of the first driving rod 331 of the driving member 33 and is driven by the first driving rod 331 to move leftward, so that the reset member 312 needs to apply an opposite pushing force to the locking pin 311 to enter the locking hole of the locking member 32, that is, the reset member 312 is installed at the left side of the mounting groove 1121 and applies a force to the locking pin 311 at the right side of the mounting groove 1121, and the locking hole 1122 is also disposed at the right side of the mounting groove 1121. Of course, it will be understood by those skilled in the art that in other embodiments, the locking hole 1122 can be disposed at the bottom right side of the mounting groove 1121, and corresponds to the position of the locking member 32 to facilitate the locking member 32 entering the mounting groove 1121 through the locking hole 1122.

Furthermore, in the embodiment shown in fig. 8, the restoring member 312 is a spring, it is understood that the restoring member 312 is not limited to be in the form of an elastic member, and for example, it may also be configured as a magnetic strip or a magnetic block, such as a plurality of magnetic strips or magnetic blocks disposed on the base 3111, another magnetic strip or magnetic block disposed in the hole of the latch 3112 and attracted thereto, the latch device 31 moves downward to the position of the latch hole, and the magnetic strips in the latch hole and the magnetic strips on the base 3111 attract each other to allow the latch 3112 to be locked into the latch hole.

Fig. 10 is a perspective view of a latch member 311 according to an embodiment of the present invention. As shown in fig. 10, the latch member 311 includes a base 3111, a latch 3112 and a guiding post 3113, the base 3111, the latch 3112 and the guiding post 3113 are integrally formed, the latch 3112 is disposed at one end of the base 3111, the guiding post 3113 is disposed at the top of the base 3111, and the guiding post 3113 can extend out of the mounting groove 1121 and can be movably mounted in the handle 11 after the latch device 31 is mounted in the mounting groove 1121 of the base 112. The force applied to the guiding post 3113 can push the guiding post 3113 to move in the mounting groove 1121 and drive the locking pin 311 to move, for example, the guiding post 3113 is extended out of the handle 11, the guiding post 3113 can be manually pushed to move left and right, the guiding post 3113 can be disposed in the driving groove 334 of the driving member 33, and the driving member 33 can push the guiding post 3113 to move when moving. Specifically, movement of the first driver 33 to the left drives the guide post 3113 to the left and out of engagement with the left latch 32, and movement of the second driver 33 to the right drives the guide post 3113 to the right and out of engagement with the right latch 32. In this embodiment, the base 3111 is in the shape of a rectangular parallelepiped and is integrally installed inside the installation groove 1121, and the shape of the base 3111 is integrally larger than the guide post 3113 and the locking member 32 so that the whole locking pin device 31 is in a stable state during operation.

The outside end downward sloping of spring bolt 3112 forms inclined plane 3114, inclined plane 3114 and spring bolt 3112 up end form the wedge, pull rod 1 pulls out the back from box 2, latch device 31 is located the unblock position, pull rod 1 moves down the in-process of condensing box 2, thereby through inclined plane 3114 and the inclined plane cooperation of lock 32 promote spring bolt 3112 to move left, reset piece 312 is compressed, removal face 3114 on the spring bolt 3112 slides until breaking away from spigot surface 3211 on the lock 32 along the spigot surface 3211 on the lock 32, continue the downward application of force in pull rod 1, inclined plane 3114 breaks away from spigot surface 3211, spring bolt 3112 moves down to the position of the lockhole of lock 32, reset piece 312 promotes base 3111 and drives spring bolt 3112 and moves into in the spring bolt hole, pull rod 1 and box 2 are locked each other.

It should be noted that, although the latch member 311 includes the base 3111, the latch tongue 3112 and the guide post 3113 in the above embodiment, in other embodiments, the latch member may include only the latch tongue and the guide post, and the latch tongue is directly disposed at the bottom or the side of the guide post.

Fig. 11 is a perspective view of a locking member 32 according to an embodiment of the present invention. While the locking member 32 is shown in fig. 11 as being fixedly mounted at its lower end in the recess 21 of the housing 2, in the embodiment shown in fig. 11, the locking member 32 is a square locking post, it will be appreciated that the locking member 32 may have other shapes, such as a cylinder. The upper end of the lock 32 forms an engaging portion 321, one side of the engaging portion 321 forms a guide surface 3211, the guide surface 3211 is inclined in the horizontal direction at an angle substantially the same as the inclined surface 3114 of the lock pin device 31, and the inclined surface 3114 and the guide surface 3211 engage with each other to drive the lock pin 311 of the lock pin device 31 to move in a direction away from the lock hole 3. In the process of retracting the drawbar 1 downward into the box body, the engaging portion 321 extends into the mounting groove 1121. The lock part 32 still is equipped with the lockhole 322, and the lockhole 322 can be followed and transversely run through whole lock part formation through-hole, also can be a trough-shaped, as long as can satisfy in the lockhole is gone into to the abundant card of spring bolt 3112, the shape of lockhole is unrestricted, can be similar with spring bolt 3112, also can be other shapes, as long as satisfy that spring bolt 3112 is stable in spring bolt 3112 downthehole can. Preferably, the hole of the latch 3112 is slightly larger than the outer contour of the latch 3112 to make the latch 3112 easier to move into the hole.

In the process that the pull rod 1 is condensed in the box body 2, namely in the process that the handle 11 is downwards embedded into the groove 21, the locking piece 32 firstly enters the handle 11 and is matched with the locking pin piece 311 of the locking pin device 31, the locking pin piece 311 is forced to backwards compress the resetting piece 312 to move, when the pull rod 1 continuously moves downwards and the locking pin piece 311 of the locking pin device 31 is aligned with the locking hole of the locking piece 32, the resetting piece 312 drives the locking pin piece 311 to extend into the locking hole of the locking piece 32, the mutual locking of the pull rod 1 and the box body 2 is realized, and therefore the pull rod 1 is prevented from extending out of the box body 2 and being damaged in the processes of carrying, consignment and the like.

When the draw bar 1 needs to be pulled out from the box body 2, the driving piece 33 is controlled by the pressing control piece 34 to drive the locking pin piece 311 of the locking pin device 31 to be separated from the locking hole of the locking piece 32, and the draw bar 1 is unlocked from the box body 2. Specifically, the control member 34 controls the first driving rod 331 of the driving member 33 to move leftward, so as to drive the latch member 311 to move leftward, compress the reset member 312 and withdraw from the locking hole 1122 of the latch member 32 for unlocking, and similarly, the control member 34 controls the second driving rod 332 of the driving member 33 to drive the latch member 311 on the other side to move rightward, compress the reset member 312 on the other side and withdraw from the locking hole 1122 of the latch member 32 on the other side for unlocking, so as to pull the drawbar 1 out of the case 2.

Referring back to fig. 3, in the embodiment shown in fig. 3, two latch mechanisms are provided on the handle 11, which are identical in structure and are respectively engaged with the first driving lever 331 and the second driving lever 332, that is, the first driving lever 331 drives the latch device 31 of one latch mechanism 3 on the left side in the figure to move leftward, the second driving lever 332 drives the latch device 31 of the other latch mechanism 3 on the right side in the figure to move rightward, and the two are operated simultaneously to lock the pull rod 1 in the box 2 more stably, it is understood that in other embodiments, a single latch mechanism or a plurality of latch mechanisms 3 may be provided.

Referring back to fig. 8, the first driving rod 331 and the second driving rod 332 are further provided with a driving groove 334, a side of the driving groove 334 on the first driving rod 331 away from the first telescopic rod 12 is defined as a force-bearing surface 3341, a side of the driving groove 334 on the second driving rod 332 away from the second telescopic rod 13 is defined as a force-bearing surface 3341, the guide post 3113 of the locking pin member 311 can extend out of the mounting groove 1121 and can be movably connected to the driving groove 334, when the first driving rod 331 moves to the left, when the force-bearing surface 3341 drives the latch member 311 to move leftward to retreat from the locking hole of the locking member 32 to withdraw the drawbar 1 from the housing 2, when the holding portion 342 of the control member 34 is pressed, the pushing portion 341 moves downward and drives the first driving rod 331 to move leftward, the force-bearing surface 3341 in the driving groove 334 moves leftward and drives the guiding post 3113 to move leftward, and the guiding post 3113 moves leftward to compress the reset member 312 and disengage from the locking hole of the locking member 32, so as to unlock the lock. The moving direction of the second driving rod 332 is opposite to the moving direction of the first driving rod 331, but the operation principle of the locking mechanism 3 controlled by the second driving rod 332 is the same as that of the locking mechanism 3 of the first driving rod 331, and the description thereof is omitted.

Fig. 9 is a perspective view of a guide plate 9 according to an embodiment of the present invention. Optionally, the locking mechanism 3 further includes a slot guide plate 35, and the slot guide plate 35 is fixedly installed at the opening of the installation slot 1121 and fixes the base 3111 of the locking pin device 31 in the installation slot 1121. In the embodiment shown in fig. 9, the slot guide plate 35 is mounted to the base 112 by screws. It is understood that the guide slot plate 35 may not be used, and the locking pin member 311 may be installed in the installation slot 1121 in other manners, for example, a guide rail may be installed in the installation slot 1121, a slider is installed on the base 3111 of the locking pin member 311, and the locking pin member 311 is installed in the guide rail of the installation slot 1121 through the slider and can slide left and right in the installation slot 1121.

In this embodiment, the guide groove plate 35 is provided with a guide groove 351 extending from the upper surface of the guide groove plate 35 to the lower surface of the guide groove plate 35, the guide groove 351 includes a guide groove 3511 and an engaging groove 3512, the width of the guide groove 3511 is slightly larger than the diameter of the guide post 3113 so as to facilitate the movement of the guide post 3113 in the guide groove 3511, and the guide groove 3511 provides a movement track for the guide post 3113 so that the guide post 3113 can be accurately locked into the lock hole. The width of the engaging groove 3512 is wider than that of the guide groove 3511 so as to facilitate the entry of the engaging portion 321 of the lock member 32, and after the lock member 32 is locked to the lock member 32, the upper end of the lock member 32 can be engaged with the engaging groove 3512 so as to stabilize the entire lock mechanism 3.

In this embodiment, the widths of the guide groove 3511 and the engaging groove 3512 of the guide groove plate 35 are smaller than the width of the base 3111 of the locking pin device 31, after the locking pin device 31 is installed in the installation groove 1121, the guide groove plate 35 can fix the locking pin device 31 in the installation groove 1121 up and down, that is, when the base 112 moves up and down, the guide groove plate 35 and the installation groove 1121 drive the locking pin device 31 to move up and down together, and the locking pin device 31 can move left and right along the guide groove 3511 in the installation groove 1121.

It should be noted that, although the draw bar 1 of the present invention is described in the above embodiments by taking the draw bar box as an example, it should be understood that the draw bar 1 of the present invention is not limited to be applied to the draw bar box, but can be applied to other devices requiring dragging movement, such as a sound box, a tool box, etc.

For example, in one embodiment, the pull rod 1 may be disposed on a sound box, and the sound box is equipped with the pull rod 1 of the present invention and the bottom thereof may be provided with a roller, for example, to drag the sound box to move through the pull rod. The first telescopic rod 12 and the second telescopic rod 13 of the pull rod 1 can be arranged on a box body or in the box body of a sound box and can extend out of or be condensed on the sound box, so that the handle has an extending position and a condensing position, the handle 11 of the pull rod 1 is provided with a lock pin device 31, the top of the sound box is provided with a lock piece 32, when the pull rod 1 extends out of the sound box, namely the handle 11 is in the extending position, the lock pin device 31 is separated from the lock piece 32, when the pull rod 1 is condensed behind the sound box, namely the handle 11 is in the condensing position, the lock pin device 32 is locked into the lock piece 32, so that the pull rod 1 is locked on the sound box.

For example, in another embodiment, the draw bar 1 may be disposed on a tool box, and the tool box is equipped with the draw bar 1 of the present invention and may be provided with a roller at the bottom, for example, to drag the tool box to move through the draw bar 1. The first telescopic rod 12 and the second telescopic rod 13 of the pull rod 1 can be arranged on or in a box body of a tool box and can be extended or contracted from the tool box so that the handle 11 has an extended position and a contracted position, the handle 11 of the pull rod 1 is provided with a lock pin device 31, the top of the tool box is provided with a locking piece 32, when the pull rod 1 extends out of the tool box, namely the handle 11 is in the extended position, the lock pin device 31 is separated from the locking piece 32, when the pull rod 11 is contracted in the tool box, namely the handle 11 is in the contracted position, the lock pin device 31 is locked into the locking piece 32, so that the pull rod 1 is locked on the tool box.

The preferred embodiments of the present invention have been described in detail, but it should be understood that various changes and modifications can be made by those skilled in the art after reading the above teaching of the present invention. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims (16)

1. A pull rod is characterized by comprising a first telescopic rod, a second telescopic rod and a handle, wherein two ends of the handle are respectively connected with the first telescopic rod and the second telescopic rod and are provided with a lock pin device of a locking mechanism, the lock pin device is matched with a locking piece of the locking mechanism, and the handle has an extending position and a condensing position according to different states of the first telescopic rod and the second telescopic rod;

when the handle is in the retracted position, the detent mechanism locks into the lock,

when the handle is in the extended position, the detent mechanism disengages the lockout member.

2. The drawbar of claim 1, wherein the detent mechanism further includes an actuating member, the detent arrangement includes a detent member and a reset member, the reset member engages the detent member and drives the detent member toward the detent member, and the actuating member engages the detent member and drives the detent member away from the detent member.

3. The drawbar of claim 2, wherein the locking mechanism further includes a control member disposed on the handle and cooperating with the drive member to drive the drive member in motion.

4. The pull rod of claim 3, wherein the handle includes a base and a cover, the cover cooperates with the base to form an accommodation space, the driving member is mounted in the accommodation space, wherein the base is provided with at least one mounting groove, and the reset member and the latch member are movably mounted in the mounting groove.

5. The drawbar of claim 4, wherein the latch member includes a locking tongue and a guide post, the guide post being mounted in the mounting slot and engaging the drive member, the locking tongue extending in a direction perpendicular to the guide post and engaging the locking member.

6. The pull rod of claim 5, wherein a locking hole is further formed in the bottom of the mounting groove, a clamping portion is arranged at the upper end of the locking piece, the clamping portion is matched with the locking hole and can movably extend into the locking hole, and a locking hole matched with the lock tongue is formed in the lower end or the side portion of the locking piece.

7. The drawbar according to claim 6, wherein the engaging portion is provided with a guide surface, and the locking tongue of the locking pin member is provided with an inclined surface that cooperates with the guide surface.

8. The drawbar of claim 5, wherein the locking mechanism further comprises a guide plate movably mounting the detent member in the mounting slot, wherein the guide plate is provided with a guide slot through which the guide post passes and is movable along the guide slot.

9. The pull rod of claim 5, wherein the driving member has at least one driving slot, the guide post is movably connected to the driving slot, and one of the side walls of the driving slot is used for pushing the guide post to move.

10. A drawbar according to claim 9, characterized in that the drive member is provided with at least one first drive surface and the control member is provided with at least one sliding surface which cooperates with the first drive surface.

11. The tie rod of claim 10 wherein said drive member includes a first drive rod and a second drive rod, and wherein said tie rod is provided with two of said detent arrangements, said first drive rod and said second drive rod respectively engaging said two detent arrangements and each providing one of said drive slots.

12. The pull bar of claim 11, wherein one end of the first drive rod engages the first telescoping rod and the other end of the first drive rod provides the first drive surface, and wherein one end of the second drive rod engages the second telescoping rod and the other end of the second drive rod provides the second drive surface.

13. The pull rod of claim 11, wherein the control member includes a holding portion and at least one pushing portion, an upper end of the pushing portion is fixedly connected with the holding portion, and a lower end of the pushing portion forms a sliding surface at least matching with the first driving surface; preferably, one of the pushing portions forms two sliding surfaces, and the two sliding surfaces are respectively matched with the driving surface of the first driving rod and the driving surface of the second driving rod.

14. The drawbar according to claim 13, wherein a first pushing portion and a second pushing portion are provided at the bottom of the grip portion, and an inclined sliding surface is provided at each of both ends of the first pushing portion and the second pushing portion and respectively engaged with the first driving surface of the first driving rod and the first driving surface of the second driving rod.

15. The drawbar of claim 13, wherein the first drive rod is further provided with a first opening, the second drive rod is further provided with a second opening, one second drive surface is further provided in each of the first opening and the second opening, the second drive surface in the first opening of the first drive rod and the first drive surface of the second drive rod engage the two sliding surfaces of one of the pusher portions, and the second drive surface in the second opening of the second drive rod and the first drive surface of the first drive rod engage the two sliding surfaces of the other pusher portion.

16. A draw-bar box, characterized in that it comprises a box body and a draw-bar according to any one of claims 1 to 15, and a locking mechanism, said box body being provided with said locking member, said first telescopic bar and said second telescopic bar being telescopically mounted on said box body.

Images