Draw-bar hinge structure of draw-bar box

Abstract

The technical scheme belongs to the technical field of draw-bar boxes, and particularly relates to a draw bar hinge structure of a draw-bar box, which comprises a box body, a draw bar and a connecting rod, the draw bar and the connecting rod are arranged on a side plate of the box body, a mounting groove is formed in the side plate of the box body, mounting holes are formed in the left side and the right side of the mounting groove, and two ends of the connecting rod respectively penetrate through the corresponding mounting holes. The lower end of the pull rod is hinged in the mounting groove through a connecting rod; the connecting rod is provided with a strip-shaped groove, the strip-shaped groove penetrates through the end faces of the two ends of the connecting rod in the length direction of the connecting rod, and an abutting part and a limiting part protrude out of the inner wall of the side plate of the box body and are located on the two opposite sides of the mounting groove respectively. After the connecting rod axially slides along the strip-shaped groove relative to the abutting part, the connecting rod sequentially penetrates through the corresponding mounting hole and the pull rod, at the moment, the connecting rod is located between the abutting part and the limiting part, compact and efficient limiting and fixing are achieved, the stability and durability of the connecting rod structure are enhanced, the length needed by the connecting rod is shortened, and the material cost is reduced. And the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The technical scheme relates to the technical field of trolley cases, in particular to a trolley hinge structure of a trolley case. BACKGROUND

[0002] A trolley case is a luggage case designed with a trolley and wheels, which is convenient for users to move in a dragging manner, usually equipped with a lock and multiple storage spaces, and is often suitable for travel or daily carrying. The existing folding trolley case has the function of folding and storing, saves storage space, and is convenient to carry, and is widely used when buying vegetables or carrying, as a carrying tool to assist in carrying objects.

[0003] For example, Chinese patent CN217446914U discloses a cable-stayed folding vegetable-buying cart, which is combined and connected to include a box body bottom plate, a box body side plate, a box body front end plate, and a box body back plate with an open top. The box body bottom plate is provided with a hinge shaft on one side, which can be rotated and turned over. The box body back plate is fixedly connected with a fixed plate body on the outside. The fixed plate body is provided with a receiving groove on both sides. The receiving groove is provided with a stretching rod inside. The stretching rod is provided with a rectangular cylinder on the outside of the lower end. The rectangular cylinder is provided with a strip-shaped groove at the lower end. The strip-shaped groove is in the shape of a gourd. A connecting rod is provided through the middle of the strip-shaped groove. The connecting rod is rotatably connected to both sides of the receiving groove. The stretching rod is set to be adjustable in inclination. The stretching rod and the box body can be adjusted in stretching angle. The box body and the stretching rod are not easily damaged.

[0004] In order to realize the inclination adjustment, the existing stretching rod needs to be provided with a connecting rod at the middle of the strip-shaped groove at the lower end, which is used as a hinge point to connect the stretching rod. The connecting rod is provided at both ends of the box body. Since it needs to bear a certain load, it is preferably made of high-strength metal material, and the length requirement is relatively high, which increases the material cost and leads to high cost. Therefore, it needs to be improved. SUMMARY

[0005] In order to solve the problem of high cost caused by the long length of the connecting rod for hinge fixing of the stretching rod, the technical scheme provides a trolley hinge structure of a trolley case.

[0006] The purpose of the technical scheme is achieved as follows:

[0007] A trolley hinge structure of a trolley case, comprising a box body, a trolley and a connecting rod arranged on the side plate of the box body, wherein the side plate of the box body is formed with a mounting groove, the mounting groove is provided with mounting holes on both sides, the connecting rod is provided with mounting holes on both ends, and the trolley is hingedly connected to the mounting groove through the connecting rod.

[0008] The connecting rod is provided with a strip-shaped slot which penetrates through the end faces of the connecting rod along the length direction of the connecting rod, the inner wall of the side plate of the box body is provided with an abutting part and a limiting part, the abutting part and the limiting part are respectively located on the opposite sides of the mounting slot, and the connecting rod is embedded with the abutting part through the strip-shaped slot;

[0009] When the connecting rod slides along the axial direction relative to the abutting part, the connecting rod is sequentially arranged in the corresponding mounting hole and the pull rod, and at this time, the connecting rod is located between the abutting part and the limiting part.

[0010] Through the above technical scheme, when the pull rod hinge structure of the pull rod box is normally used, the lower end of the pull rod is hingedly connected in the mounting slot on the front side of the box body, the pull rod can be telescopic adjusted and hidden in the mounting slot, the pull rod can be rotated forwardly relative to the box body around the connecting rod as the hinge axis, so as to facilitate pulling the box body and reduce the deformation degree of the box body; the position of the strip-shaped slot of the connecting rod is moved backward to be close to the abutting part, the opening of the strip-shaped slot is aligned with the abutting part for embedding, and then the connecting rod is abutted on the abutting part and pushed forward along the axial direction, so that the connecting rod slides and then the one end thereof passes through the mounting hole on one side, the pull rod and the mounting hole on the other side in sequence downwardly, until the end is abutted on the limiting part and stopped, at this time, the connecting rod is separated from the abutting part, the other end thereof along the sliding direction is abutted on the side wall of the abutting part, and the compact and efficient limiting and fixing are realized through the limiting part and the abutting part, the length required by the connecting rod is shortened, the material cost is reduced, and then the production cost is reduced.

[0011] Preferably, the connecting rod is a circular pipe.

[0012] Through the above technical scheme, since the connecting rod is selected as a circular pipe, the hollow structure is formed in the connecting rod, the shape of the strip-shaped slot tends to be a circular slot, more space is provided in the sliding process to reduce the friction and resistance when sliding along the axial direction, the connecting rod is more easily embedded with the abutting part, the operation is more smooth, the circular pipe design can more effectively utilize the raw materials, compared with other shapes, the space is larger, the hollow structure reduces the amount of materials used, thereby improving the material utilization rate and reducing the production cost.

[0013] Preferably, the shape of the strip-shaped slot is rectangular.

[0014] Through the above technical scheme, the square slot is matched with the abutting part, the swing of the connecting rod after being embedded is reduced, the shape of the square slot is relatively simple, the square slot can be more easily manufactured through mechanical processing or mold forming, the complexity in the manufacturing process and the required time are reduced, and the production cost is reduced.

[0015] Preferably, the connecting rod comprises a connecting section and abutting sections arranged on both sides of the connecting section.

[0016] The two opposite side walls corresponding to the strip-shaped slot are provided with the abutting sections, the end portions of the two abutting sections are matched to form the opening, and the abutting sections have edges for abutting against the box to limit rotation.

[0017] Through the above technical solution, the edges on the two abutting sections cooperate to form a limiting plane, which can tightly abut against the box to provide additional support for the connecting rod, so that the pull rod will not be rotated when in use, has good stability, reduces the wear of the connecting rod during long-term use, and prolongs the service life.

[0018] Preferably, the opposite sides of the slot opening of the strip-shaped slot have inclined surfaces, and the two inclined surfaces are matched to make the opening outwardly flared.

[0019] Through the above technical solution, the two inclined surfaces are matched to make the opening outwardly flared, which makes it easier and smoother to align and fit the abutting part, so that it is guided to embed along the inclined direction of the inclined surface, improving the efficiency and accuracy of assembly.

[0020] Preferably, the abutting part has a first plane, which is arranged on one side of the abutting part along the embedding direction of the connecting rod;

[0021] The mounting hole on one side of the mounting slot opening direction penetrates through the front side wall of the box, and the inner wall of the mounting hole opposite to the penetration end has a second plane;

[0022] The span distance between the first plane and the second plane along the sliding direction of the connecting rod is less than the thickness of the connecting section.

[0023] Through the above technical solution, since the span distance between the first plane and the inner wall of the mounting hole is less than the thickness of the connecting section, the first plane will be depressed during the sliding of the connecting rod through the mounting hole, and the abutting part will be deformed, so that the connecting rod can smoothly pass through the mounting hole. Once the connecting rod is separated from the abutting part, the abutting part recovers, so that the side wall of the connecting section and the side wall of the abutting part are relatively aligned to form the abutting limiting on this side, limit the swing of the connecting rod under stress, and achieve stable limiting state to improve the installation stability.

[0024] Preferably, the abutting part and the limiting part are arranged in position and the spacing distance of the opposite side walls is adapted to the length of the connecting rod.

[0025] Through the above technical solution, when the connecting rod is located between the abutting part and the limiting part and clamped in the two mounting holes, the two ends can be stably abutted, limited and fixed when sliding to the specified position, reducing the axial swing and looseness of the connecting rod under stress, and further improving the stability.

[0026] Preferably, the box has a reinforcing rib, the limiting part and the abutting part are arranged on the reinforcing rib, and the limiting plane abuts against the reinforcing rib.

[0027] By the above technical scheme, the reinforcing rib is an important structure in the box structure for increasing strength and stability, by arranging the limiting part and the abutting part on the reinforcing rib, the structural strength of these components can be further enhanced, and external force and impact can be better resisted; the connecting rod abuts against the reinforcing rib through the edge, and the reinforcing rib is arranged protruding perpendicularly to the mounting hole to limit the size of the hole diameter of the mounting hole, so as to reduce the swing range of the connecting rod in the mounting hole after installation, and further improve the installation stability and strength.

[0028] The technical scheme has the following prominent and beneficial technical effects compared with the prior art:

[0029] 1. According to the technical scheme, the opening of the strip-shaped groove on the connecting rod is aligned with the abutting part, the abutting part is embedded into the strip-shaped groove, and then the connecting rod is pushed forward along the strip-shaped groove to slide forward, so that the connecting rod passes through the first mounting hole, the through hole on the pull rod and the second mounting hole in sequence, and then one end of the connecting rod abuts against the limiting part and the other end abuts against the abutting part, so that the limiting and fixing are realized, the stability and durability of the connecting rod structure are enhanced, the length of the connecting rod required is shortened, the material cost is reduced, and then the production cost is reduced;

[0030] 2. According to the technical scheme, the span distance of the plane one with respect to the inner wall of the mounting hole in the sliding direction of the connecting rod is less than the thickness of the connecting section, the abutting part is deformed by the downward pressure of the connecting rod sliding on the plane one, the abutting part is elastically restored when the connecting rod is fixed in the mounting hole, the abutting part is in abutting contact with the connecting rod to limit the swing of the connecting rod under stress, and the stable limiting state of the connecting rod is achieved, so that the installation stability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0032] Figure 2 It is a schematic diagram of the front part structure of the box in the embodiment;

[0033] Figure 3 It is a schematic diagram of the Figure 2 another perspective view;

[0034] Figure 4 It is a schematic diagram of the Figure 3 partial enlarged view;

[0035] Figure 5 It is a partial sectional view of the embodiment;

[0036] Figure 6 It is a schematic diagram of the Figure 5 partial enlarged view;

[0037] Figure 7 Another partial cross-sectional view of the embodiment;

[0038] Figure 8 A partial enlarged view of the embodiment; Figure 7

[0039] Figure 9 A schematic view of the overall structure of the connecting rod in the embodiment, in which the connecting rod is a circular tube;

[0040] Figure 10 A schematic view of the overall structure of the connecting rod in the embodiment, in which the connecting rod is a circular tube;

[0041] The figure shows: 1, box; 2, pull rod; 3, mounting groove; 4, connecting rod; 41, connecting section; 42, abutting section; 5, strip-shaped groove; 7, abutting portion; 8, mounting hole; 9, limiting portion; 10, edge; 11, plane one; 12, reinforcing rib; 13, inclined surface; 14, plane two. DETAILED DESCRIPTION

[0042] The specific embodiments of the technical solution will be described in further detail below with reference to the accompanying drawings.

[0043] Embodiment:

[0044] Referring to Figure 1 and Figure 2 , a pull rod hinge structure of a pull rod box includes a box 1 and a pull rod 2. The box 1 is foldable, and a mounting groove 3 is formed on the front side of the box 1. The mounting groove 3 includes two mounting grooves 3, and the grooves are vertically through to the lower end of the box 1. The pull rod 2 is located on the front side of the box 1 and includes two rod body portions. The pull rod 2 is adapted to the mounting groove 3 and is correspondingly embedded. Two connecting rods 4 are arranged between the box 1 and the pull rod 2, one for each mounting groove 3. The two rod body portions at the lower end of the pull rod 2 are correspondingly embedded in the mounting groove 3 to hinge, so that the pull rod 2 can rotate forward or backward relative to the box 1 around the connecting rod 4.

[0045] Referring to 9 and Figure 10 Each connecting rod 4 has a strip-shaped groove 5 that is through both ends along the length direction of the connecting rod 4. When the connecting rod 4 is a circular rod, the strip-shaped groove 5 is formed by cutting the side wall along the length direction of the circular rod. The shape of the strip-shaped groove 5 can also be set as a square groove or other shapes that are adapted to the abutting portion 7.

[0046] The connecting rod 4 includes a connecting section 41 and two abutting sections 42 integrally formed on both sides of the connecting section 41. The strip-shaped groove 5 has corresponding abutting sections 42 formed on the opposite side walls. The strip-shaped groove 5 has a slot corresponding to the side wall of the connecting rod 4, and the channel width of the slot is adapted to the thickness of the abutting portion 7.​

[0047] The opposite sides of the slot mouth of the strip-shaped slot 5 are provided with inclined surfaces 13, and the inclined surfaces 13 on the opposite sides face each other and are inclined in a direction matched to make the opening of the strip-shaped slot 5 outwardly flared. Each abutting section 42 is provided with an edge 10, and is arranged at the outer side edge of the corresponding inclined surface 13. The two edges 10 on the connecting rod 4 are parallel and in the same plane, forming a rotation limiting plane.

[0048] Referring to Figure 4 The opposite side walls of each mounting slot 3 are provided with mounting holes 8, and the hole positions of the two mounting holes 8 are aligned. The mounting holes 8 can pass through to the rear side of the box body 1. The box body 1 is provided with an abutting portion 7 which is in the form of a sheet and has the ability to elastically deform. The abutting portion 7 is located between the two mounting slots 3 and is arranged to protrude towards the side away from the slot mouth of the mounting slot 3. The opening 6 of the connecting rod 4 is aligned with the abutting portion 7, so that the strip-shaped slot 5 is fitted with the abutting portion 7 and axially slides along the length direction of the abutting portion 7 to the position of the mounting hole 8. The box body 1 is further provided with a limiting portion 9 which is located on the same side as the abutting portion 7 and is arranged in alignment with the abutting portion 7. The spacing distance between the limiting portion 9 and the opposite side walls of the abutting portion 7 is adapted to the length of the connecting rod 4. After the connecting rod 4 is sequentially arranged in the two mounting holes 8, the connecting rod 4 is limited between the abutting portion 7 and the limiting portion 9.

[0049] Referring to Figure 5 , Figure 6 , Figure 7 and Figure 8 The limiting mode of the connecting rod 4 is specifically that the abutting portion 7 has a first plane 11 which is arranged as the side end face of the abutting portion 7 in the fitting direction of the connecting rod 4. The span distance of the first plane 11 with respect to the inner wall of the mounting hole 8 along the sliding direction of the connecting rod 4 is 1-2 mm, and the thickness thereof is preferably 1.5 mm in the present application. The span distance is smaller than the thickness of the limiting portion 9 or the pipe wall of the connecting rod 4 in the form of a circular tube, and the span distance α is preferably 1.5 mm. When the connecting rod 4 slides, one end of the connecting rod 4 presses the first plane 11 downward when passing through the first mounting hole 8, so that the abutting portion 7 deforms to be sufficient to pass through the mounting hole 8. After passing through the two mounting holes 8 and the pull rod 2, the abutting portion 7 is abutted against the limiting portion 9. At this time, the connecting section 41 is separated from the abutting of the first plane 11, the abutting portion 7 elastically recovers, and the side wall of the abutting portion 7 forms abutting limiting to the other end of the connecting rod 4. The box body 1 is provided with a reinforcing rib 12, and the limiting portion 9 and the abutting portion 7 are arranged on the reinforcing rib 12. The two edges 10 of the connecting rod 4 are abutted against the reinforcing rib 12. When the pull rod 2 pulls the box body 1, the connecting rod 4 always receives the force away from the span distance.

[0050] The specific working process of the present scheme is as follows:

[0051] The technical scheme is characterized in that the lower end of the pull rod 2 is hingedly connected in the mounting groove 3 on the front side of the box body 1, the pull rod 2 is hidden in the mounting groove 3 after being extended or retracted to reduce space, the pull rod 2 rotates around the connecting rod 4 relative to the box body 1, and the pull rod 2 is independently inclined to the front side to facilitate pulling the box body 1; the opening 6 on the connecting rod 4 is moved close to the abutting part 7, the abutting part 7 is embedded in the strip-shaped groove 5, the connecting rod 4 is pushed to slide forward along the strip-shaped groove 5, one end of the connecting rod 4 passes through the first mounting hole 8, the through hole on the pull rod 2 and the second mounting hole 8 in sequence and slides to stop until the end abuts against the limiting part 9 on the other side, at this time, the connecting rod 4 has been separated from the abutting part 7, the other end of the connecting rod 4 abuts against the side wall of the abutting part 7 in the sliding direction, compact and efficient limiting and fixing are realized, the stability and durability of the structure of the connecting rod 4 are enhanced, the length of the connecting rod 4 required is shortened, the material cost is reduced, and the production cost is further reduced.

[0052] The basic principle and main features of the technical scheme and the advantages of the technical scheme are shown and described above. It should be understood by those skilled in the art that the technical scheme is not limited to the above-mentioned embodiments, the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the technical scheme, various changes and improvements of the technical scheme can be made without departing from the spirit and scope of the technical scheme, and these changes and improvements all fall within the scope of the claimed technical scheme. The scope of protection of the technical scheme is defined by the appended claims and their equivalents.

Claims

1. A trolley hinging structure of a trolley case, comprising a case body (1) and a trolley (2) and a connecting rod (4) arranged on the side plate of the case body (1), the side plate of the case body (1) is formed with a mounting groove (3), the left and right sides of the mounting groove (3) are provided with mounting holes (8), the two ends of the connecting rod (4) are respectively arranged in the corresponding mounting holes (8), and the lower end of the trolley (2) is hingedly arranged in the mounting groove (3) through the connecting rod (4), characterized in that: the connecting rod (4) is provided with a strip-shaped groove (5) penetrating through the end faces of the two ends of the connecting rod (4) along the length direction of the connecting rod (4), the inner wall of the side plate of the case body (1) is provided with an abutting portion (7) and a limiting portion (9), the abutting portion (7) and the limiting portion (9) are respectively located on the opposite sides of the mounting groove (3), and the connecting rod (4) is embedded with the abutting portion (7) through the strip-shaped groove (5). When the connecting rod (4) slides along the axial direction relative to the abutting portion (7), the connecting rod (4) is sequentially arranged in the corresponding mounting hole (8) and the trolley (2), and at this time, the connecting rod (4) is located between the abutting portion (7) and the limiting portion (9). The connecting rod (4) is a circular pipe.

2. The trolley joint structure of the trolley case according to claim 1, characterized in that: The shape of the strip-shaped groove (5) is rectangular.

3. The trolley joint structure of the trolley case according to claim 1, characterized in that: The connecting rod (4) comprises a connecting section (41) and abutting sections (42) arranged on the two sides of the connecting section (41).

4. The draw hinge structure of a draw-along case according to claim 3, characterized in that: The opposite two side walls of the strip-shaped groove (5) are correspondingly formed into the abutting sections (42), and the abutting sections each have an edge (10) for abutting on the case body (1) to limit rotation. The opposite two sides of the slot of the strip-shaped groove (5) have inclined surfaces (13), and the two inclined surfaces (13) are matched to make the opening of the strip-shaped groove (5) outwardly flared.

5. The draw hinge structure of a draw-along case according to claim 2 or 3, characterized in that: The abutting portion (7) has a first plane (11) arranged on one side end face of the abutting portion (7) in the embedding direction of the connecting rod (4).

6. The draw hinge structure of a draw-along case according to claim 4, wherein: The side of the mounting hole (8) towards the slot direction of the mounting groove (3) penetrates the front side wall of the case body (1), and the inner wall of the side of the mounting hole (8) opposite to the penetrating end has a second plane (14). The span distance between the first plane (11) and the second plane (14) in the sliding direction of the connecting rod (4) is smaller than the thickness of the connecting section (41). The abutting portion (7) and the limiting portion (9) are arranged in position and the interval distance of the opposite side walls is adapted to the length of the connecting rod (4).

7. The draw hinge structure of a draw-along case according to claim 1, characterized in that: The case body (1) has a reinforcing rib (12), the limiting portion (9) and the abutting portion (7) are arranged on the reinforcing rib (12), and the edge (10) abuts on the reinforcing rib (12).

8. The draw hinge structure of a draw-along case according to claim 4, wherein: ​

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