Crossbar, retractable pull rod assembly and tool box

Abstract

The present application discloses a crossbar, a retractable pull rod assembly and a tool box. The retractable pull rod assembly includes two opposite connecting rods, a crossbar sleeved at the ends of the two connecting rods and a pull rod that can be relatively retracted in the connecting rods. The crossbar includes a crossbar body and a button part, a gear part, a driving part and an elastic part arranged in the crossbar body. The button part, the gear part and the driving part are mutually connected in transmission. The button part can drive the driving part to retract in the crossbar body through the gear part, and the driving part can automatically return to its position through the elastic part, so that the connecting rod and the pull rod are mutually unlocked and locked. The retractable pull rod assembly of the present application has a simple structure, is smoother to use, and improves the feel of use.

Description

Technical Field

[0001] The present application relates to the technical field of tool boxes, and in particular to a cross bar, a telescopic pull rod assembly and a tool box. Background Art

[0002] A toolbox is a container for storing tools and various household sundries. It can be used for various purposes such as production, household, maintenance, fishing, etc. and is widely used. Toolboxes include mobile toolboxes, which are moved by telescopic rods. However, the existing telescopic rods have complex structures and are not smooth in extension, which reduces the user experience. Summary of the invention

[0003] The present application provides a cross bar, a telescopic pull rod assembly and a tool box to solve the problems that the existing telescopic pull rod has a complex structure, is not smooth in extension and retraction, and reduces the user experience.

[0004] In order to solve the above technical problems, the present application proposes a retractable pull rod assembly, comprising two opposite connecting rods, a cross bar mounted on the ends of the two connecting rods and a pull rod which can be relatively retracted in the connecting rods. The cross bar comprises a cross bar body and a button part, a gear part, a driving part and an elastic part arranged in the cross bar body. The button part, the gear part and the driving part are connected to each other by transmission. The button part can drive the driving part to retract into the cross bar body through the gear part, and the driving part can automatically return to its position through the elastic part, thereby unlocking and locking the connecting rod and the pull rod to each other.

[0005] Wherein, button racks are arranged at both ends of the button member, and the button racks are meshed with the gear of the gear member.

[0006] Among them, a vertical guiding structure is arranged in the body of the cross bar, and the vertical guiding structure includes a vertical protrusion and a vertical guiding groove, the vertical protrusion is formed on the guide column, and the vertical guiding groove is formed on the button member; a limiting rib is also formed in the body of the cross bar, and the limiting rib is located between the body of the cross bar and the driving member.

[0007] The gear member is a driving gear, which is located between the button member and the driving member and is meshed with the button member and the driving member.

[0008] Among them, the driving member is a driving block, and the end face of the driving block facing the cross bar is provided with a driving rack and the end thereof is provided with a protrusion, which can protrude from the cross bar body; a limiting part is provided on the protrusion, and the limiting part is always located in the cross bar body.

[0009] Among them, a connecting rod notch is provided on the connecting rod, a pulling rod notch is provided on the pulling rod, and a cross bar notch is provided on the cross bar; when the button member is pressed, the protrusion is retracted into the cross bar body, and the connecting rod and the pulling rod are unlocked from each other; when the button member is released from being pressed, the protrusion extends out of the cross bar body and is located in the connecting rod notch, the pulling rod notch and the cross bar notch, and the connecting rod and the pulling rod are locked from each other.

[0010] Wherein, a horizontal guide structure is arranged in the body of the crossbar, and the horizontal guide structure comprises a horizontal protrusion and a horizontal guide groove, the horizontal protrusion is formed on the connecting column, and the horizontal guide groove is formed on the driving member.

[0011] The elastic member is a spring, and both ends of the spring are respectively connected to the driving member; when the driving member is retracted in the crossbar body, the spring is compressed.

[0012] Among them, a buckle is provided at one end of the connecting rod, and a slot is opened on the cross bar, and the buckle is snapped into the slot; a limiting column is provided in the pull rod, and the end of the limiting column close to the cross bar protrudes from the pull rod, and a limiting slot is provided on the cross bar, and the limiting column and the limiting slot can be engaged with each other.

[0013] In order to solve the above technical problems, the present application proposes a toolbox, including a toolbox body and a retractable rod assembly, wherein the retractable rod assembly is arranged on the toolbox body, and the retractable rod assembly is the retractable rod assembly described above.

[0014] In order to solve the above technical problems, the present application proposes a cross bar, which includes a cross bar body and a button part, a gear part, a driving part, and an elastic part arranged in the cross bar body. The button part, the gear part and the driving part are connected to each other through transmission. The button part can drive the driving part to retract into the cross bar body through the gear part, and the driving part can automatically return to its position through the elastic part.

[0015] The beneficial effects of the present application are as follows: Different from the prior art, the present application provides a retractable pull rod assembly, in which a button part, a gear part and a driving part are mutually connected in transmission, and the button part can drive the driving part to retract into the cross bar body through the gear part; the two ends of the elastic part are connected with driving parts, and the driving part can automatically return to its position through the elastic part, so that the connecting rod and the pull rod can be mutually unlocked and locked. Through the above method, not only the pull rod unlocking and locking is realized, but also the structure is simple, making the pull rod unlocking and locking process smoother, improving the smoothness of the retractable pull rod assembly, and greatly improving the user's feel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 is an exploded schematic diagram of the retractable pull rod assembly of the present application;

[0018] Figure 2 is a partial cross-sectional view of the retractable pull rod assembly of the present application in a locked state;

[0019] Figure 3 is a partial cross-sectional view of the retractable pull rod assembly of the present application in an unlocked state;

[0020] Figure 4 yes Figure 1 The partial explosion diagram shown;

[0021] Figure 5 This is a schematic diagram of the structure of the retractable pull rod assembly of the present application. Figure 1 ;

[0022] Figure 6 yes Figure 5 Enlarged view of part A in the middle;

[0023] Figure 7 It is a structural schematic diagram of the cover plate of the present application;

[0024] Figure 8 This is a schematic diagram of the structure of the retractable pull rod assembly of the present application. Figure 2 ;

[0025] Fig. 9 yes Figure 8 Enlarged view of middle part B;

[0026] Fig.10 It is a structural schematic diagram of the crossbar of this application.

[0027] Figure numbers: 11, cross bar; 111, connecting column; 112, guide column; 113, limiting groove; 114, clamping groove; 115, cross bar notch; 12, connecting rod; 121, buckle; 122, connecting rod notch; 13, pull rod; 131, limiting column; 132, pull rod notch; 14, handle; 3, button member; 31, button rack; 4, driving member; 41, driving block; 411, protrusion; 412, driving rack; 413, limiting part; 42, elastic member; 5, gear member; 51, driving gear; 6, horizontal guide structure; 61, horizontal protrusion; 62, horizontal guide groove; 7, vertical guide structure; 72, vertical guide groove; 8, cover plate; 81, limiting rib. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The following describes in detail a cross bar, a telescopic pull rod assembly and a tool box provided by the present invention in conjunction with the embodiments.

[0032] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 is an exploded schematic diagram of the retractable pull rod assembly of the present application; Figure 2 is a partial cross-sectional view of the retractable pull rod assembly of the present application in a locked state; Figure 3 It is a partial cross-sectional view of the retractable pull rod assembly of the present application in an unlocked state.

[0033] In one embodiment, the retractable pull rod assembly includes a cross bar 11, two connecting rods 12 and two pull rods 13. The two connecting rods 12 are arranged opposite to each other, and the two connecting rods 12 are used to connect a tool box (not shown in the figure) and wheels (not shown in the figure), etc. The two ends of the cross bar 11 are respectively sleeved at the end positions of the two connecting rods 12 to achieve the connection between the cross bar 11 and the two connecting rods 12. The two pull rods 13 are arranged opposite to each other, and the pull rods 13 can be correspondingly retracted in the connecting rods 12, that is, the pull rods 13 can be pulled out or retracted relative to the connecting rods 12. When the tool box needs to be moved, the pull rod 13 is pulled out from the connecting rod 12 to increase the length of the pull rod 13 so that the user can move the tool box. When the tool box does not need to be moved, the pull rod 13 is partially retracted into the pull rod 13 to reduce the overall height and size of the tool box.

[0034] The crossbar 11 includes a crossbar body (not shown in the figure), in which a button member 3, a driving member 4, a gear member 5 and an elastic member 42 are arranged, and the button member 3, the driving member 4 and the gear member 5 are connected to each other by transmission. The button member 3 can drive the driving member 4 to retract into the crossbar body through the gear member 5, so that the connecting rod 12 and the pull rod 13 are unlocked from each other; the driving member 4 can automatically return to its original position through the elastic member 42, so that the connecting rod 12 and the connecting rod 13 are locked.

[0035] In order to clearly describe the specific operation process of the telescopic pull rod assembly, a first direction and a second direction are defined. When the user presses the button member 3 and the button member 3 slides along the first direction close to the inside of the cross bar 11, the button member 3 is connected to the gear member 5, and the button member 3 drives the two gear members 5 to approach each other along the second direction; at the same time, the gear member 5 is connected to the drive member 4, and the gear member 5 drives the two drive members 4 to approach each other along the second direction, so that the two drive members 4 are retracted into the cross bar body, thereby realizing the mutual unlocking of the connecting rod 12 and the pull rod 13, wherein the pull rod 13 is in a state that can be pulled out or retracted, that is, the telescopic pull rod assembly is in an unlocked state. At the same time, in the process of the two drive members 4 approaching each other, the elastic member 42 is subjected to force and is in a compressed state, just as Figure 3 shown.

[0036] When the user releases the pressure on the button member 3, the elastic member 42 returns to its original position automatically. During this process, the elastic member 42 pushes the two driving members 4 away from each other in the second direction, so that the ends of the two driving members 4 are respectively pressed against the surface positions of the relatively arranged pull rods 13, until the driving member 4 is inserted into the predetermined area of ​​the pull rod 13 (not shown in the figure), thereby achieving mutual locking between the connecting rod 12 and the pull rod 13. At the same time, in the process of pushing the two driving members 4 away from each other, the driving member 4 drives the gear member 5 to move, and the gear member 5 drives the button member 3 to return to its original position away from the cross bar 11 in the first direction. The above-mentioned pull rod 13 is in a locked state, that is, the telescopic pull rod assembly is in a locked state, just as Figure 2 shown.

[0037] Thus, through the cooperation between the button member 3, the driving member 4, the gear member 5 and the elastic member 42, not only the unlocking and locking of the pull rod 13 is realized, but also the structure is simple. At the same time, the button member 3 and the driving member 4 are driven by the gear member 5, that is, the gear member 5 is engaged between the button member 3 and the driving member 4, so that the sliding of the button member 3 and the movement of the two driving members 4 are smoother, and then the unlocking and locking process of the pull rod 13 is smoother, thereby improving the smoothness of the retractable pull rod assembly and greatly improving the user's feel.

[0038] The button member 3, the driving member 4 and the gear member 5 are all arranged in the cross bar 11, so that the internal structure is more compact, and the cross bar 11 can also provide a translation track for the driving member 4, so that the driving member 4 can reciprocate horizontally along the second direction to avoid its movement from being offset. The first direction and the second direction can be arranged vertically. Of course, in other embodiments, the first direction and the second direction may not be arranged vertically, which is not limited here. For example, the first direction can be a vertical direction, and the second direction can be a horizontal direction.

[0039] Specifically, see Figure 4 , Figure 4 yes Figure 1 The partial explosion diagram shown. Figures 1 to 3 , button racks 31 are provided at both ends of the button member 3, and the button racks 31 are meshed with the gear member 5, so that the button member 3 moves more smoothly, improves the smoothness of the retractable pull rod assembly, and greatly improves the user's feel.

[0040] The button rack 31 extends in the same direction as the direction in which the button member 3 moves toward the crossbar 11. For example, the button rack 31 can extend in the first direction. The button rack 31 can be integrally formed with the button member 3, or the button rack 31 can be disposed on a connecting plate (not shown in the figure), and the connecting plate is disposed on both ends of the button member 3, which is not limited here.

[0041] See also Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the structure of the retractable pull rod assembly of the present application. Figure 1 ; Figure 6 yes Figure 5 In one embodiment, in combination with Figure 1A vertical guide structure 7 is provided in the crossbar body, and the vertical guide structure 7 plays a guiding role, and can limit the sliding movement of the button member 3 along the first direction, prevent it from being offset, improve the smoothness of pressing the button member 3, and further improve the smoothness of the movement of the telescopic pull rod assembly, and improve the user experience. The vertical guide structure 7 can be any structure, as long as it can limit the sliding movement of the button member 3 along the first direction, and its specific structure is not limited.

[0042] Specifically, the vertical guide structure 7 includes a vertical protrusion (not shown in the figure) and a vertical guide groove 72, which cooperate with each other to provide a guide for the button 3 to move along the first direction. A guide column 112 is provided in the crossbar body, and the guide column 112 is vertically arranged along the first direction.

[0043] For example, in a specific embodiment, the vertical protrusion is formed on the guide column 112, and the vertical guide groove 72 is formed on the button member 3. When the button member 3 moves relative to the cross bar 11, the vertical protrusion slides in the vertical guide groove 72 along the first direction, limiting the button member 3 to move in the first direction and preventing it from deviating. In this embodiment, there are two concave vertical guide grooves 72 on both sides of the button member 3, and four guide columns 112 are provided in the cross bar 11. The vertical protrusion is located in the corresponding vertical guide grooves 72 to limit the button member 3 to slide upward in the first direction.

[0044] As in another specific embodiment, a vertical protrusion is formed on the button member 3, and a vertical guide groove 7 is formed on the guide column 112. During the sliding movement of the button member 3 relative to the cross bar 11, the vertical protrusion slides in the vertical guide groove 72 along the first direction, thereby limiting the button member 3 to move along the first direction and preventing it from being offset.

[0045] See also Figure 7 , Figure 7 is a schematic diagram of the structure of the cover plate of the present application. In one embodiment, combined with Figure 1 A limiting rib 81 is formed in the crossbar body, wherein the limiting rib 81 is located in the area between the crossbar body and the driving member 4. The limiting rib 81 can limit the driving member 4 from tilting during the translation process along the second direction, thereby maintaining the horizontal reciprocating motion of the driving member 4 along the second direction.

[0046] Specifically, the crossbar 11 further includes a cover plate 8, which is disposed on the crossbar 11 to form the crossbar body, wherein the limiting ribs 81 are disposed in the cover plate 8. The limiting ribs 81 in the cover plate 8 cooperate with the crossbar body to further ensure that the driving member 4 does not tilt or tilt during the translation of the driving member 4 in the second direction, thereby maintaining the driving member 4 to be able to reciprocate horizontally smoothly.

[0047] The cover plate 8 is detachably connected to the cross bar 11, so that the cover plate 8 is stably connected to the cross bar 11. A plurality of screw columns (not shown in the figure) are formed inside the cover plate 8, and the fixing screws are passed through the cross bar 11 and connected to the screw columns on the cover plate 8, so that the cover plate 8 can be firmly installed on the cross bar 11, so as to protect the internal components of the cross bar 11 and enable them to move reliably inside.

[0048] The button member 3 is inserted through the cover plate 8 and can slide in the cross bar 11 along the first direction. The cover plate 8 can not only protect the internal structure of the cross bar 11, such as the button member 3, the driving member 4 and the gear member 5, but also has an aesthetic effect, and can limit the upward displacement distance of the button member 3 away from the cross bar 11 in the first direction.

[0049] Please read back Figures 1 to 4 In one embodiment, the gear member 5 is a driving gear 51, and the driving gear 51 is located between the button member 3 and the driving member 4, wherein the driving gear 51 is respectively engaged with the button member 3 and the driving member 4. The driving gear 51 is respectively engaged with the button member 3 and the driving member 4, so that the button member 3 slides and the driving member 4 translates more smoothly, thereby making the movement of the retractable pull rod assembly smoother; and the unlocking and locking movements of the pull rod 13 are more reliable, the action is more direct, and the use feel is better.

[0050] Please read back Figures 1 to 4 In one embodiment, the driving member 4 is a driving block 41, and a driving rack 412 is provided on the end face of the driving block 41 facing the cross bar 11, wherein the driving rack 412 can be integrally formed with the driving block 41, or the driving rack 412 is provided on a connecting plate (not shown in the figure), and the connecting plate is provided on the end face of the driving block 41 facing the cross bar 11, which is not limited here.

[0051] For example, when button racks 31 are provided at both ends of the button member 3 and the gear member 5 is a driving gear 51, the driving gear 51 is meshed and connected with the button rack 31 and the driving gear 412 respectively. By pressing the button member 3 down along the first direction close to the cross bar 11, the button rack 31 on the button member 3 drives the two driving gears 51 to rotate close to each other along the second direction; during the rotation of the two driving gears 51, the driving gear 51 drives the driving rack 412 to move, so that the driving block 41 moves close to the elastic member 42, thereby making the two driving blocks 41 simultaneously close to the elastic member 42 along the second direction, and compressing the elastic member 42. At this time, the pull rod 13 is in an unlocked state, and the pull rod 13 can be pulled out or retracted, that is, the telescopic pull rod assembly is in an unlocked state.

[0052] After the user releases the button member 3, the elastic member 42 returns to its original state under compression, and the elastic member 42 pushes the two drive blocks 41 away from each other at the same time; in addition, when the drive blocks 41 move away from each other, the two drive racks 412 both drive the drive gear 51 in the opposite direction to rotate away from each other in the second direction, and the drive gear 51 drives the button rack 31 to move, so that the button member 3 returns to its position away from the cross bar 11 in the first direction. When the drive block 41 hits the surface of the pull rod 13 and is supported, the gear member 5 stops rotating. When the pull rod 13 is pulled and the drive block 41 can be inserted into the predetermined area of ​​the pull rod 13, the pull rod 13 is in a locked state, that is, the telescopic pull rod assembly is in a locked state.

[0053] Therefore, through the meshing connection between the above-mentioned driving gear 51 and the button rack 31 and the meshing connection between the driving gear 51 and the driving rack 412, not only the sliding of the button member 3 and the translation of the two driving blocks 41 are smoother, thereby making the movement of the retractable pull rod assembly smoother; but also the unlocking and locking movement of the pull rod 13 is more reliable, the action is more direct, and the feel of use is better.

[0054] In addition, the end of the driving block 41 is provided with a protrusion 411. When the telescopic pull rod assembly is in a locked state, the protrusion 411 can protrude from the cross bar body and lock the pull rod 13, that is, fix the pull rod 13 and the connecting rod 12. When the telescopic pull rod assembly is in an unlocked state, the protrusion 411 is located inside the cross bar body, releasing the lock between the pull rod 13.

[0055] Please read back Figure 3 and Figure 4 Furthermore, a limiting portion 413 is provided on the protruding portion 411. No matter whether the telescopic pull rod assembly is in a locked state or an unlocked state, the limiting portion 413 is always located in the inner space of the cross bar body, and the limiting portion 413 can limit the excessive protrusion of the protruding portion 411 of the driving block 41. When the driving block 41 is engaged with the pull rod 13, the limiting portion 413 is engaged with the inside of the cross bar 11 to prevent the protruding portion 411 from excessively moving into the inside of the pull rod 13.

[0056] In one embodiment, please refer to Figures 1 to 3 The connecting rod 12 is provided with a connecting rod notch 122, the pull rod 13 is provided with a pull rod notch 132, and the cross bar 11 is provided with a cross bar notch 115. When the button member 3 is pressed, the protrusion 411 on the driving block 41 is sequentially retracted from the pull rod notch 132, the connecting rod notch 122 and the cross bar notch 115 into the cross bar body. When the button member 3 is released from being pressed, the protrusion 411 extends out of the cross bar body and is sequentially located in the cross bar notch 115, the connecting rod notch 122 and the pull rod notch 132, so that the protrusion 411 on the driving block 41 is quickly inserted into the pull rod notch 132, thereby realizing mutual locking between the connecting rod 12 and the pull rod 13.

[0057] Please read back Figures 1 to 3 At least two groups of pull rod notches 132 may be provided between the two pull rods 13, wherein the pull rod notches 132 may be one group, two groups or multiple groups. When the pull rod notches 132 may be multiple groups, the pull rod 13 may be extended to different lengths according to the positions of the pull rod notches 132, so that the user can adjust the extended length of the pull rod 13 according to different usage environments, which is convenient for the user to use. If two groups of pull rod notches 132 are provided between the two pull rods 13, the locking of the pull rod 13 after being pulled out a certain distance and the retraction of the pull rod 13 a certain distance are both related to the distance between the two groups of pull rod notches 132. The distance between the adjacent pull rod notches 132 is not limited and can be determined according to actual conditions.

[0058] When the protrusion 411 in the driving block 41 is engaged with the pull rod 13 , the limiting portion 413 on the protrusion 411 is engaged with the cross bar notch 115 of the cross bar 11 to prevent the end of the driving block 41 from excessively moving into the pull rod 13 through the pull rod notch 132 .

[0059] See also Figure 8 and Fig. 9 , Figure 8 This is a schematic diagram of the structure of the retractable pull rod assembly of the present application. Figure 2 ; Fig. 9 yes Figure 8 In one embodiment, in combination with Figure 1 A horizontal guide structure 6 is provided in the crossbar body. The horizontal guide structure 6 can play a guiding role, can limit the translational movement of the driving member 4 along the second direction, prevent it from deflecting, improve the smoothness of the translation of the driving member 4, and thus improve the smoothness of the movement of the telescopic pull rod assembly. The above-mentioned horizontal guide structure 6 can be any structure, as long as it can limit the translational movement of the driving member 4 along the second direction, and its specific structure is not limited.

[0060] Specifically, the horizontal guide structure 6 includes a horizontal protrusion 61 and a horizontal guide groove 62, which cooperate with each other to provide a guide for the driving member 4 to move along the second direction. A connecting column 111 is provided in the crossbar body, and the connecting column 111 is vertically arranged along the first direction.

[0061] In a specific embodiment, the horizontal protrusion 61 is formed on the connecting column 111, and the horizontal guide groove 62 is formed on the driving member 4. During the translation of the driving member 4 relative to the crossbar 11, the horizontal protrusion 61 translates in the horizontal guide groove 62, thereby preventing the driving member 4 from being offset when it translates in the second direction. In this embodiment, when the driving member 4 is a driving block 41, the two driving blocks 41 are symmetrically provided with horizontal guide grooves 62 on both end surfaces along the second direction, and two groups of connecting columns 111 are symmetrically provided in the crossbar body, and the horizontal protrusions 61 on the connecting columns 111 are all accommodated in the horizontal guide grooves 62 to limit the translation of the two driving blocks 41 in the second direction.

[0062] As in another specific embodiment, a horizontal protrusion 61 is formed on the driving member 4, and a horizontal guide groove 62 is provided on the connecting column 111. During the translation of the driving member 4 relative to the cross bar 11, the horizontal protrusion 61 slides in the horizontal guide groove 62, limiting the translation of the driving member 4 along the second direction to prevent it from being offset.

[0063] See also Figures 1 to 3 In one embodiment, the elastic member 42 may be a spring (not shown in the figure), and both ends of the spring are respectively connected to the driving member 4. When the protrusion 411 of the driving member 4 is retracted into the crossbar body, the two driving members 4 compress the springs respectively, so that the springs are in a compressed state. When the protrusion 411 of the driving member 4 extends out of the crossbar body, the spring returns to its original state.

[0064] Also, see Figure 1 , Figure 5 and Figure 8 The retractable pull rod assembly also includes a handle 14, which is connected to one end of the two pull rods 13 away from the connecting rod 12. The handle 14 can be used to drag the tool box, pull out or retract the pull rod 13, etc. Optionally, the handle 14 is connected to both ends of the pull rod 13 by rivets. The connecting rod 12 can be made of plastic or metal or alloy material, etc., which is not limited here. The pull rod 13 can be made of metal or alloy material, etc., which is not limited here. The above-mentioned connecting rod 12 and pull rod 13 can both be arranged in a tubular shape.

[0065] In one embodiment, please refer to Figure 1 , Figure 5 and Figure 8A buckle 121 is provided at one end of the connecting rod 12, and a slot 114 is provided on the cross bar 11. The slot 114 of the cross bar 11 and the buckle 121 of the pull rod 13 are engaged with each other to realize the connection between the cross bar 11 and the two connecting rods 12. In order to improve the stability between the cross bar 11 and the two connecting rods 12, the buckle 121 is configured as an inverted buckle (not shown in the figure), and the end of the inverted buckle is inclined toward the bottom of the connecting rod 12, wherein the inverted buckle is engaged in the slot 114, reducing the risk of the cross bar 11 coming out, thereby improving the stability of the connection between the cross bar 11 and the two connecting rods 12.

[0066] In one embodiment, please refer to Figure 3 , Figure 8 and Fig. 9 A limiting column 131 is provided in the pull rod 13, and one end of the limiting column 131 close to the cross bar 11 protrudes from the pull rod 13. The cross bar 11 is provided with a limiting groove 113. The limiting column 131 cooperates with the limiting groove 113 to limit the pull rod 13 and prevent the pull rod 13 from overextending. The limiting column 131 can be integrally formed with the pull rod 13, or the limiting column 131 is connected to the pull rod 13, which is not limited here.

[0067] Compared with the prior art, in the telescopic pull rod assembly of this embodiment, the button member 3, the gear member 5 and the driving member 4 are mutually connected in transmission, and the button member 3 can drive the driving member 4 to retract into the cross bar body through the gear member 5; the driving member 4 is connected to both ends of the elastic member 42, and the driving member 4 can automatically return to its position through the elastic member 42, so that the connecting rod 1 and the pull rod 13 are mutually unlocked and locked. Through the above method, not only the unlocking and locking of the pull rod 13 is realized, but also the structure is simple, making the unlocking and locking process of the pull rod 13 smoother, improving the smoothness of the telescopic pull rod assembly, and greatly improving the user's feel.

[0068] In one embodiment, the toolbox includes a toolbox body and a retractable rod assembly, and the retractable rod assembly is arranged on the toolbox body, making the toolbox more convenient to use, thereby improving the use experience of the toolbox. It should be noted that the retractable rod assembly in this embodiment is the retractable rod assembly described in the above embodiment, and will not be repeated here.

[0069] See also Fig.10 , Fig.10 It is a schematic diagram of the structure of the crossbar of the present application. In one embodiment, the crossbar 11 includes a crossbar body (not shown in the figure), and a button member 3, a driving member 4, a gear member 5 and an elastic member 42 are arranged in the crossbar body, and the button member 3, the driving member 4 and the gear member 5 are connected to each other. For example, the button member 3 can drive the driving member 4 to retract into the crossbar body through the gear member 5, and the driving member 4 is connected to both ends of the elastic member 42, and the driving member 4 can automatically return to its position through the elastic member 42. In the above manner, the crossbar 11 can be unlocked or locked in an external tool device, such as a tool cart.

[0070] The number of the crossbar 11 can be one, two or more. When the crossbar 11 is used in the tool cart, the crossbar 11 can be provided with a storage board, etc. The crossbar 11 can be unlocked or locked on the tool cart through its own structure, so that the placement of the storage board can be adjusted. Of course, the crossbar 11 can also be used in other devices, which is not limited here.

[0071] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A retractable pull rod assembly, characterized in that: It comprises two opposite connecting rods, a cross rod sleeved on the ends of the two connecting rods and a pull rod which can be relatively telescopic in the connecting rods, the cross rod comprises a cross rod body and a button member, a gear member, a driving member and an elastic member arranged in the cross rod body, the button member, the gear member and the driving member are mutually connected in transmission, the button member can drive the driving member to retract in the cross rod body through the gear member, the driving member can automatically return to its position through the elastic member, so that the connecting rod and the pull rod are mutually unlocked and locked; The gear member is a driving gear, which is located between the button member and the driving member, and is meshed with the button member and the driving member at the bottom, and the driving gear is suspended at the bottom; a horizontal guide structure is provided in the crossbar body, and the horizontal guide structure includes a horizontal protrusion and a horizontal guide groove, the horizontal protrusion is formed on the connecting column, and the horizontal guide groove is formed on the driving member; The button member is provided with button racks at both ends, and the button racks are meshed with the gear of the gear member; The elastic member is horizontally arranged and connected between the two driving members.

2. The telescopic pull rod assembly according to claim 1, characterized in that: A vertical guiding structure is arranged in the cross bar body, and the vertical guiding structure includes a vertical protrusion and a vertical guiding groove, wherein the vertical protrusion is formed on the guide column, and the vertical guiding groove is formed on the button member; a limiting rib is also formed in the cross bar body, and the limiting rib is located between the cross bar body and the driving member.

3. The telescopic pull rod assembly according to claim 1, characterized in that: The driving member is a driving block, and the end surface of the driving block facing the cross bar is provided with a driving rack and the end thereof is provided with a protrusion, and the protrusion can protrude from the cross bar body; a limiting portion is provided on the protrusion, and the limiting portion is always located in the cross bar body.

4. The telescopic pull rod assembly according to claim 3, characterized in that: The connecting rod is provided with a connecting rod notch, the pulling rod is provided with a pulling rod notch, and the cross bar is provided with a cross bar notch; when the button member is pressed, the protrusion is retracted into the cross bar body, and the connecting rod and the pulling rod are unlocked from each other; when the button member is released from being pressed, the protrusion extends out of the cross bar body and is located in the connecting rod notch, the pulling rod notch and the cross bar notch, and the connecting rod and the pulling rod are locked from each other.

5. The telescopic pull rod assembly according to claim 1, characterized in that: The elastic member is a spring, and both ends of the spring are respectively connected to the driving member; when the driving member is retracted in the cross bar body, the spring is compressed.

6. The telescopic pull rod assembly according to claim 1, characterized in that: A buckle is provided at one end of the connecting rod, and a slot is provided on the cross bar, and the buckle is snapped into the slot; a limiting column is provided in the pull rod, and one end of the limiting column close to the cross bar protrudes from the pull rod, and a limiting slot is provided on the cross bar, and the limiting column and the limiting slot can be snapped into each other.

7. A tool box, characterized in that: It comprises a tool box body and a retractable pull rod assembly, wherein the retractable pull rod assembly is arranged on the tool box body, and the retractable pull rod assembly is the retractable pull rod assembly according to any one of claims 1 to 6.

8. A crossbar, characterized in that: The crossbar comprises a crossbar body and a button member, a gear member, a driving member, and an elastic member arranged in the crossbar body. The button member, the gear member, and the driving member are in transmission connection with each other. The button member can drive the driving member to retract into the crossbar body through the gear member, and the driving member can automatically return to its original position through the elastic member. The gear member is a driving gear, which is located between the button member and the driving member, and is respectively engaged with the button member and the driving member at the bottom thereof, and the driving gear is suspended at the bottom thereof; a horizontal guide structure is arranged in the crossbar body, and the horizontal guide structure comprises a horizontal protrusion and a horizontal guide groove, the horizontal protrusion is formed on the connecting column, and the horizontal guide groove is formed on the driving member; The button member is provided with button racks at both ends, and the button racks are meshed with the gear of the gear member; The elastic member is horizontally arranged and connected between the two driving members.

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