Connecting piece and folding hand buggy applying same

Abstract

A connecting piece comprises a body, the body is provided with a vertically-through stand column inserting hole, the outer wall of the body transversely extends to form a first inserting part and a second inserting part, and the first inserting part and the second inserting part are distributed in a crossed mode and used for being connected with a supporting rod in an inserted mode. At least one of the first center line of the first inserting part and the second center line of the second inserting part deviates from the circle center of the stand column inserting hole, and the first center line of the first inserting part and the second center line of the second inserting part deviate from the circle center of the stand column inserting hole in the same direction. The sum of the distance between the first center line of the first inserting part and the center of the stand column inserting hole and the distance between the second center line and the center of the stand column inserting hole is larger than or equal to the thickness of the supporting rod. The connecting piece can be universally used on the stand column, and the supporting rod in the X-shaped hinge piece can be a straight pipe. The utility model further discloses a folding hand buggy applying the connecting piece.

Description

Technical Field

[0001] This utility model relates to the field of outdoor products technology, and in particular to a connector and a folding handcart using the connector. Background Technology

[0002] In daily life, whether it's camping, shopping, or moving production materials, we often need to move luggage or other items, and handcarts are frequently used in this process. In order to minimize the space occupied by handcarts when not in use, handcarts that are small in size and easy to operate are becoming increasingly popular in the market.

[0003] Currently, there are many types of foldable handcarts on the market. Existing foldable handcarts typically use two methods to avoid interference between the connecting tubes during folding: bending the connecting tubes or using multiple types of connectors. Bending the connecting tubes means using one type of connector, but the connecting tube itself needs to be bent. Using multiple types of connectors means using at least two types of connectors, but the connecting tube itself does not need to be bent. For example, a patent application with application number 2023104868830 discloses a modular convergent folding trailer frame, including a modular vertical support assembly and a modular side folding assembly connected to the modular vertical support assembly. The modular vertical support assembly includes at least one set of universally configured first columns. Each set of first columns includes two first columns arranged along the width direction of the frame body. Outer column top seats, outer column bases, and outer column slides are respectively provided at the upper and lower ends and the middle part of the first columns. The outer column top seats and outer column slides each have two connecting tubes. The two pipe fittings are connected at 90°. From the drawings of this patent application, it can be seen that the outer column slide and the outer column top seat have different structures. The axes of the two pipe fittings connecting parts of the outer column slide pass through the center of the first column insertion hole, while the axes of the two pipe fittings connecting parts of the outer column top seat do not pass through the center of the first column insertion hole. In addition, the modular side folding assembly includes two sets of X-type hinges. The X-type hinges are formed by two universally configured side frame cross tubes cross-hinged by axle pins. The inner ends of the side frame cross tubes in the two sets of X-type hinges are rotatably connected by cross tube connecting assemblies. The outer ends of the side frame cross tubes in the two sets of X-type hinges are respectively hinged to the corresponding outer column top seat and outer column slide.

[0004] However, the two methods mentioned above either require incompatible connectors or require bending of the connecting tubes, resulting in higher development and production costs for folding handcarts. Utility Model Content

[0005] The first technical problem to be solved by this utility model is to provide a highly versatile connector in light of the current state of the technology.

[0006] The second technical problem to be solved by this utility model is to provide a folding handcart that uses the above-mentioned connector, in view of the current state of the prior art.

[0007] The technical solution adopted by this utility model to solve the first technical problem mentioned above is as follows: a connector includes a body, wherein the body is provided with a vertically penetrating column insertion hole for inserting a column, and a first insertion part and a second insertion part extend laterally on the outer wall of the body. The first insertion part and the second insertion part are intersecting and are respectively used for inserting support rods. At least one of the first center line of the first insertion part and the second center line of the second insertion part deviates from the center of the column insertion hole, and the deviation directions of the first center line of the first insertion part and the second center line of the second insertion part relative to the center are opposite. Under the same circumstances, the sum of the distance between the first center line of the first plug-in portion and the distance between the second center line of the second plug-in portion and the center of the column socket is greater than or equal to the thickness of the support rod; or when the first center line of the first plug-in portion and the second center line of the second plug-in portion deviate from the center in opposite directions, the difference between the distance between the first center line of the first plug-in portion and the distance between the second center line of the second plug-in portion and the center of the column socket is greater than or equal to the thickness of the support rod.

[0008] The first center line of the first connector and the second center line of the second connector deviate from the center of the circle in the same direction, meaning that both the first center line of the first connector and the second center line of the second connector deviate from the center of the circle in a clockwise or counterclockwise direction. The second center line of the first connector and the second center line of the second connector deviate from the center of the circle in opposite directions, meaning that one of the first center line of the first connector and the second center line of the second connector deviates from the center of the circle in a clockwise direction, and the other deviates from the center of the circle in a counterclockwise direction.

[0009] Preferably, the extending direction of the first insertion part and the extending direction of the second insertion part are perpendicular to each other. Using the above scheme, the included angle between the first insertion part and the second insertion part is 90 degrees, and the connector can be used for rectangular folding parts, such as folding handcarts and folding chairs. In other embodiments, the included angle between the first insertion part and the second insertion part can be 60 degrees or 120 degrees, for example, when the included angle between the first insertion part and the second insertion part is 60 degrees, the connector can be used for equilateral triangular folding parts; for example, when the included angle between the first insertion part and the second insertion part is 120 degrees, the connector can be used for equilateral hexagonal folding parts.

[0010] Preferably, the first insertion portion and the second insertion portion are located at the same height on the outer wall of the main body.

[0011] Preferably, the first center line of the first plug-in portion and the second center line of the second plug-in portion are both deviated from the center of the post insertion hole, wherein the first center line of the first plug-in portion deviates inward and the second center line of the second plug-in portion deviates outward. With this scheme, the sum of the distances from the first center line of the first plug-in portion to the center of the post insertion hole and the distances from the first center line of the second plug-in portion to the center of the post insertion hole is greater than or equal to the thickness of the support rod. The different directions of deviation between the first center line of the first plug-in portion and the second center line of the second plug-in portion facilitate the generation of a deviation commensurate with the thickness of the support rod while minimizing the deviation from the center of the post insertion hole. The less the first center line and the second center line deviate from the center of the post insertion hole, the stronger the connector. In other embodiments, for example, when the diameter of the post insertion hole is much larger than its thickness, both the first center line and the second center line can simultaneously deviate inward or outward, generating a deviation commensurate with the thickness of the support rod.

[0012] Preferably, the first and second insertion parts are provided with insertion slots for inserting support rods, and the two opposite side walls of the insertion slots are provided with shaft holes for connecting the support rods.

[0013] A connector includes a body having a vertically penetrating post insertion hole for inserting a post, and a first insertion portion and a second insertion portion extending laterally on the outer wall of the body, both the first insertion portion and the second insertion portion being used to insert a support rod, characterized in that:

[0014] At least one of the first center line of the first plug-in portion and the second center line of the second plug-in portion deviates from the center of the column insertion hole. When the two connectors are sleeved on the column facing each other, the first center line of the first plug-in portion above the column is parallel to the second center line of the second plug-in portion below the column, and the horizontal distance between the first center line and the second center line is greater than or equal to the thickness of the support rod.

[0015] The second center line of the second plug portion located above the column is parallel to the first center line of the first plug portion located below the column, and the horizontal distance between the second center line and the first center line is greater than or equal to the thickness of the support rod.

[0016] The technical solution adopted by this utility model to solve the second technical problem mentioned above is as follows: a folding handcart includes a column, with two connectors inserted into the top and bottom of the column respectively. The connector located at the top of the column is denoted as the upper connector, and when the upper connector is fitted onto the column, it has a downward-facing insertion groove. The connector located at the bottom of the column is denoted as the lower connector, and it is positioned below the upper connector and facing it. When the lower connector is fitted onto the column, it has an upward-facing insertion groove. Preferably, the upper connector is fixed to the upper end of the column, and the lower connector is slidably mounted on the column.

[0017] Preferably, the folding handcart includes two uprights arranged at intervals, each upright being provided with an upper connector and a lower connector; at least one set of X-shaped hinges is provided between the two uprights, each X-shaped hinge including two cross-arranged support rods hinged together by a pivot pin, the outer ends of the support rods in the X-shaped hinge being hinged to the upper connector and the lower connector of the corresponding upright respectively.

[0018] Preferably, the folding handcart includes four uprights located at the four corners of a rectangle, each upright being provided with an upper connector and a lower connector; wherein two sets of X-shaped hinges are provided between two adjacent uprights with shorter intervals, and four sets of X-shaped hinges are provided between two adjacent uprights with longer intervals.

[0019] Compared with the prior art, the advantages of this utility model are as follows: the first and second insertion parts on the connector are designed to be offset, and the sum or difference of the distance between the first center line of the first insertion part and the center line of the second insertion part and the center line of the second insertion part is offset from the center of the column insertion hole is exactly greater than or equal to the thickness of a support rod; when the two connectors are arranged opposite to each other on the column, vertically, the first insertion part of the upper connector corresponds to the second insertion part of the lower connector, and the distance between the orthographic projection of the first insertion part of the upper connector on the horizontal plane and the orthographic projection of the second insertion part of the lower connector on the horizontal plane is exactly greater than or equal to the thickness of a support rod; the outer end of the support rod in the X-shaped hinge is hinged to the first insertion part in the upper connector and the second insertion part in the lower connector respectively, so that the support rod in the X-shaped hinge does not need to be bent; the connectors of this utility model can be universally used on columns and the support rod in the X-shaped hinge can be a straight tube;

[0020] The folding handcart of this utility model is assembled from four uprights. Every two uprights and the X-shaped hinges inserted between the two uprights together form a vertical plane. In this vertical plane, connectors are respectively provided at the upper left, lower left, upper right and lower right. The first insertion part of the upper left connector is directly opposite the second insertion part of the upper right connector, and the distance between their center lines is greater than or equal to the thickness of one support rod. The second insertion part of the lower left connector is directly opposite the first insertion part of the lower right connector, and the distance between their center lines is greater than or equal to the thickness of one support rod. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the connector structure in an embodiment of this utility model;

[0022] Figure 2 This is a structural schematic diagram of the connector from another angle in an embodiment of this utility model;

[0023] Figure 3 This is a top view of the connector in an embodiment of the present utility model;

[0024] Figure 4 This is a structural diagram of two connectors facing each other and sleeved on a column in an embodiment of the present utility model, where the solid line represents the upper connector and the dashed line represents the lower connector.

[0025] Figure 5 This is a schematic diagram of the structure of the folding handcart in the embodiment of this utility model;

[0026] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0027] Figure 7 for Figure 5 Enlarged view of point B in the middle;

[0028] Figure 8 for Figure 5 A schematic diagram of the structure of the four upper connecting parts of the folding handcart. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] like Figures 1-4The diagram shows a preferred embodiment of the connector 1 of this utility model. The connector 1 includes a body 11 with a vertically penetrating column insertion hole 111 for inserting a column 2. A first insertion portion 12 and a second insertion portion 13 extend laterally from the outer wall of the body 11. The first insertion portion 12 and the second insertion portion 13 are intersecting and respectively used to insert a support rod 3. The first insertion portion 12 and the second insertion portion 13 are located at the same height on the outer wall of the body 11, and the extending directions of the first insertion portion 12 and the second insertion portion 13 are perpendicular. The first insertion portion 12 and the second insertion portion 13 are designed to be staggered; the first center line 12a of the first insertion portion 12 and the second center line 13a of the second insertion portion 13 are both offset from the center O of the column insertion hole 111. Figure 3 As shown, the first center line 12a of the first plug-in part 12 deviates inward, and the second center line 13a of the second plug-in part 13 deviates outward. The distance between the first center line 12a of the first plug-in part 12 and the center O of the column plug hole 111 is L1, and the distance between the second center line 13a of the second plug-in part 13 and the center O of the column plug hole 111 is L2. The sum of the distance L1 between the first center line 12a of the first plug-in part 12 and the distance L2 between the second center line 13a of the second plug-in part 13 and the center O of the column plug hole 111 is equal to the thickness D of the support rod 3. In this embodiment, the sum of L1 and L2 is equal to the thickness D; however, considering that the two support rods 3 rotate and generate friction during the unfolding and folding of the folding trolley, a shim needs to be placed between the two support rods 3 at their hinge point. Therefore, the sum of L1 and L2 will be slightly greater than the thickness D of the support rod 3, which is equal to the thickness D of the support rod 3 plus the thickness of the shim.

[0031] like Figure 4 As shown, two connectors 1 are fitted onto the column 2 facing each other. The solid line represents the connector 1 located above, and the dashed line represents the connector 1 located below. The first center line 12a of the first insertion part 12 on the connector 1 above the column 2 (see...) Figure 4 The dotted line is parallel to the second center line 13a of the second insertion part 13 located on the connector 1 below the column 2 (see...). Figure 4 The double-dotted line), and the horizontal distance (L1+L2) between the first center line 12a and the second center line 13a (not shown in the figure) is equal to the thickness D of the support rod 3; similarly, the second center line 13a of the second insertion part 13 located on the connector 1 above the column 2 (see double-dotted line), and the horizontal distance between the first center line 12a and the second center line 13a ...not shown in the figure) is equal to the thickness D of the support rod 3; similarly, the second center line 13a of the second insertion part 13 located on the connector 1 above the column 2 (see double-dotted line) is equal to the thickness D of the support rod 3. Figure 4 The dotted line is parallel to the first center line 12a of the first insertion part 12 located on the connector 1 below the column 2 (see...). Figure 4 The distance (L1+L2) between the second center line 13a and the first center line 12a in the horizontal direction is equal to the thickness D of the support rod 3.

[0032] The first insertion part 12 and the second insertion part 13 are provided with insertion grooves 14 that open downwards and are used to insert the support rod 3. The two opposite side walls of the insertion groove 14 are provided with shaft holes 141 for connecting the support rod 3. The outer side wall of the insertion groove 14 is provided with a clearance hole for the support rod 3 to move.

[0033] To more clearly illustrate the function of connector 1, this utility model also provides a... Figures 5-8 The folding handcart shown includes four uprights 2 located at the four corners of a rectangle and X-shaped hinges located between adjacent uprights 2.

[0034] like Figures 5-7 As shown, the connector 1 of this utility model is a universal component. Two mirror-image connectors 1 are inserted into the top and bottom of each column 2. The connector 1 located at the top of the column 2 is designated as the upper connector 1a, with the upper part of the column 2 inserted into the column insertion hole 111 of the upper connector 1a, and the opening of the insertion groove 14 on the upper connector 1a facing downwards. The connector 1 located at the bottom of the column 2 is designated as the lower connector 1b, with the lower part of the column 2 inserted into the column insertion hole 111 of the lower connector 1b. The lower connector 1b is located below the upper connector 1a and faces the upper connector 1a, with the opening of the insertion groove 14 on the lower connector 1b facing downwards. Facing upwards; the second insertion portion 13 of the upper connector 1a and the first insertion portion 12 of the lower connector 1b are vertically opposite each other, and the distance between the orthographic projection of the second insertion portion 13 of the upper connector 1a and the orthographic projection of the first insertion portion 12 of the lower connector 1b on the horizontal plane is equal to the thickness D of the support rod 3; the first insertion portion 12 of the upper connector 1a and the second insertion portion 13 of the lower connector 1b are vertically opposite each other, and the distance between the orthographic projection of the first insertion portion 12 of the upper connector 1a and the second insertion portion 13 of the lower connector 1b on the horizontal plane is also equal to the thickness D of the support rod 3. The upper connector 1a is fixed to the upper end of the column 2, and the lower connector 1b is slidably mounted on the column 2.

[0035] like Figure 5 As shown, the X-type hinge includes two cross-arranged support rods 3 hinged together by a pivot pin 4. The support rods 3 include an inner straight tube 31 near the interior of the folding handcart and an outer straight tube 32 away from the interior of the folding handcart. In this embodiment, there is a deviation of support rod thickness D between the outer ends of the inner straight tube 31 and the outer straight tube 32 on the left side of the X-type hinge. The lateral distance between the first insertion part 12 of the upper connector 1a and the second insertion part 13 of the lower connector 1b on the same column 2 is exactly equal to the aforementioned deviation, so that the outer end of the inner straight tube 31 in the X-type hinge is precisely inserted into the first insertion part 12 on the upper connector 1a (e.g., ...). Figure 6 As shown), the outer end of the outer straight tube 32 is inserted precisely into the second insertion part 13 on the lower connector 1b (as shown). Figure 7(As shown). Both the outer ends of the inner straight tube 31 and the outer straight tube 32 are provided with connecting holes. After the outer ends of the inner straight tube 31 and the outer straight tube 32 are inserted into the corresponding insertion slots 14, the shaft pin 4 passes through the shaft hole 141 on the insertion slot 14 and the connecting hole on the straight tube to connect the X-shaped hinge to the column 2. The connection method of the outer ends of the inner straight tube 31 and the outer straight tube 32 on the right side of the X-shaped hinge is similar to the above.

[0036] There is also a deviation of the support rod thickness D between the outer end of the inner straight tube 31 and the outer straight tube 32 on the upper side of the X-type hinge. Figure 8 As shown, the four columns 2 are equipped with identical upper connectors 1a at their upper ends. The corresponding insertion parts of adjacent upper connectors 1a are staggered to match the deviation between the outer ends of the inner straight tube 31 and the outer straight tube 32 on the upper side of the X-type hinge. The matching between the outer ends of the inner straight tube 31 and the outer straight tube 32 on the lower side of the X-type hinge and the lower connector 1b is similar to the above. The outer ends of the inner straight tube 31 and the outer straight tube 32 on the upper side of the X-type hinge are also the outer ends of the inner straight tube 31 on the left side of the X-type hinge and the outer straight tube 32 on the right side of the X-type hinge, respectively; the outer ends of the inner straight tube 31 and the outer straight tube 32 on the lower side of the X-type hinge are also the outer ends of the inner straight tube 31 on the left side of the X-type hinge and the outer straight tube 32 on the right side of the X-type hinge, respectively.

[0037] In this embodiment, two sets of X-shaped hinges are provided between two adjacent columns 2 with a short interval, and four sets of X-shaped hinges are provided between two adjacent columns 2 with a long interval. In this embodiment, the included angle between the first insertion part 12 and the second insertion part 13 is 90 degrees, so the connector 1 can be used for rectangular folding parts, such as folding chairs, folding tables, and the aforementioned folding handcarts; in other embodiments, the included angle between the first insertion part 12 and the second insertion part 13 can be 60 degrees or 120 degrees, for example, when the included angle between the first insertion part 12 and the second insertion part 13 is 60 degrees, the connector 1 can be used for equilateral triangular folding parts; for example, when the included angle between the first insertion part 12 and the second insertion part 13 is 120 degrees, the connector 1 can be used for equilateral hexagonal folding parts.

Claims

1. A connector (1), comprising a body (11), wherein the body (11) is provided with a vertically penetrating post insertion hole (111) for inserting a post (2), and a first insertion portion (12) and a second insertion portion (13) extending laterally on the outer wall of the body (11), wherein the first insertion portion (12) and the second insertion portion (13) are intersectingly distributed and respectively used for inserting a support rod (3), characterized in that: At least one of the first center line (12a) of the first plug-in portion (12) and the second center line (13a) of the second plug-in portion (13) is offset from the center (O) of the post socket (111). When the first center line (12a) of the first plug-in part (12) and the second center line (13a) of the second plug-in part (13) deviate from the center (O) in the same direction, the sum of the distance (L1) of the first center line (12a) of the first plug-in part (12) from the center (O) of the post hole (111) and the distance (L2) of the second center line (13a) of the second plug-in part (13) from the center (O) of the post hole (111) is greater than or equal to the thickness (D) of the support rod (3); or When the first center line (12a) of the first plug-in part (12) and the second center line (13a) of the second plug-in part (13) deviate from the center (O) of the column socket (111) in opposite directions, the difference between the distance (L1) of the first center line (12a) of the first plug-in part (12) from the center (O) of the column socket (111) and the distance (L2) of the second center line (13a) of the second plug-in part (13) from the center (O) of the column socket (111) is greater than or equal to the thickness (D) of the support rod (3).

2. The connector (1) according to claim 1, characterized in that: The extension direction of the first plug-in portion (12) is perpendicular to the extension direction of the second plug-in portion (13).

3. The connector (1) according to claim 2, characterized in that: The first plug-in portion (12) and the second plug-in portion (13) are located at the same height on the outer wall of the body (11).

4. The connector (1) according to claim 2, characterized in that: The center line of the first plug-in part (12) and the center line of the second plug-in part (13) are both deviated from the center (O) of the column socket (111), wherein the center line of the first plug-in part (12) deviates inward and the center line of the second plug-in part (13) deviates outward.

5. The connector (1) according to any one of claims 2 to 4, characterized in that: The first insertion part (12) and the second insertion part (13) are provided with insertion grooves (14) for inserting the support rod (3), and the two opposite side walls of the insertion groove (14) are provided with shaft holes (141) for hinged to the support rod (3).

6. A connector (1), comprising a body (11), wherein the body (11) is provided with a vertically penetrating post insertion hole (111) for inserting a post (2), and a first insertion portion (12) and a second insertion portion (13) extending laterally on the outer wall of the body (11), wherein both the first insertion portion (12) and the second insertion portion (13) are used to insert a support rod (3), characterized in that: At least one of the first center line (12a) of the first plug-in part (12) and the second center line (13a) of the second plug-in part (13) is deviated from the center (O) of the column insertion hole (111). When the two connectors (1) are sleeved on the column (2) facing each other, the first center line (12a) of the first plug-in part (12) above the column (2) is parallel to the second center line (13a) of the second plug-in part (13) below the column (2), and the horizontal distance between the first center line (12a) and the second center line (13a) is greater than or equal to the thickness (D) of the support rod (3). The second center line (13a) of the second plug part (13) located above the column (2) is parallel to the first center line (12a) of the first plug part (12) located below the column (2), and the distance between the second center line (13a) and the first center line (12a) in the lateral direction is greater than or equal to the thickness (D) of the support rod (3).

7. A folding handcart, comprising a column (2), wherein two connectors (1) as described in claim 1 or 6 are respectively inserted into the top and bottom of the column (2), the connector (1) located at the top of the column (2) is referred to as the upper connector (1a), and in the state where the upper connector (1a) is sleeved on the column (2), the upper connector (1a) has a downward-facing insertion groove (14); The connector (1) located at the bottom of the column (2) is referred to as the lower connector (1b). The lower connector (1b) is located below the upper connector (1a) and is arranged facing the upper connector (1a). When the lower connector (1b) is fitted onto the column (2), the lower connector... The component (1b) has an upward-facing insertion slot (14).

8. The folding handcart according to claim 7, characterized in that: The upper connector (1a) is fixed to the upper end of the column (2), and the lower connector (1b) is slidably mounted on the column (2).

9. The folding handcart according to claim 8, characterized in that: It includes at least two columns (2) arranged at intervals, each of which is provided with an upper connector (1a) and a lower connector (1b); at least one set of X-type hinges is provided between the two columns (2), the X-type hinges include two cross-arranged support rods (3) hinged together by axle pins (4), the outer ends of the support rods (3) in the X-type hinges are respectively hinged to the upper connector (1a) and the lower connector (1b) of the corresponding column (2).

10. The folding handcart according to claim 9, characterized in that: It includes four columns (2) set at the four corners of a rectangle, each column (2) is provided with an upper connector (1a) and a lower connector (1b); two sets of X-shaped hinges are provided between two adjacent columns (2) with shorter intervals, and four sets of X-shaped hinges are provided between two adjacent columns (2) with longer intervals.

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