Double-pipe tool-free quick-release connecting mechanism and dining car

Abstract

The utility model discloses a double-pipe tool-free quick release type connecting mechanism and a dining car, the double-pipe tool-free quick release type connecting mechanism comprises a pipe connecting piece, the pipe connecting piece is provided with a first pipe cavity and a second pipe cavity, the first pipe cavity and the second pipe cavity are opened towards the two sides, and the second pipe cavity is provided with a first through hole and a first inner lock hole; the first connecting pipe is fixedly inserted into the first pipe cavity; the second connecting pipe is provided with a second through hole and a second inner lock hole and can be movably connected with the second pipe cavity in an inserted mode; by arranging the elastic piece and the hand screw, tool-free quick disassembly and quick connection of the second connecting pipe and the pipe connecting piece can be achieved, the connecting mechanism is applied to the dining car, tool-free quick disassembly of the front foot pipe and the rear foot pipe of the dining car can be achieved, meanwhile, the front foot pipe and the rear foot pipe can be quickly inserted and locked back in the follow-up assembly process, and the service life of the dining car is prolonged. After the front foot pipe and the rear foot pipe are disassembled by a large part, the size of the whole dining car can be reduced by a large half, the storage cost and the logistics cost when a factory leaves a factory can be effectively reduced, meanwhile, a consumer receives products by himself / herself, the products can be rapidly assembled without complex installation procedures, and the dining car is very convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of walking-assist dining carts, and in particular to a double-tube tool-free quick-release connection mechanism and a dining cart. Background Art

[0002] At present, in the field of dining carts with walking assistance functions, most of them adopt the method of fixed assembly by front leg tubes and rear leg tubes. If the factory completely disassembles them in daily shipment and warehousing, it will be very troublesome for consumers to assemble them all independently after purchasing them. However, if the packaging volume of the whole piece is increased a lot, it will also increase the warehousing cost and logistics delivery cost. Moreover, when consumers receive them later, it is inconvenient to carry such a large volume when they go out, and it is also difficult to put them in the trunk and take them away when driving out on a daily basis. Therefore, the above problems need to be solved. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a double-tube tool-free quick-release connection mechanism and a dining cart to solve the technical problems mentioned in the background technology.

[0004] In order to solve the technical problem, the utility model adopts the following technical solution:

[0005] A double-tube tool-free quick-release connection mechanism comprises: a tube connector, the tube connector having a first tube cavity and a second tube cavity opening toward both sides, wherein the second tube cavity is provided with a first through hole and a first inner locking hole; a first connecting tube, fixedly plugged into the first tube cavity; a second connecting tube, provided with a second through hole and a second inner locking hole and capable of being movably plugged into the second tube cavity; and also comprising a spring piece and a hand screw, wherein the spring piece is embedded in the second connecting tube and can pass through the first inner locking hole and the second inner locking hole through an elastic insertion shaft on one side thereof, and the hand screw can pass through the first through hole and the second through hole in sequence, thereby realizing rapid locking and unlocking of the second connecting tube and the second tube cavity.

[0006] Specifically, a third through hole is formed on the first tube cavity, a fourth through hole is formed on the first connecting tube, and a fixing bolt passes through the third through hole and the fourth through hole to fix the first connecting tube and the tube connecting tube.

[0007] Specifically, an expansion fixing piece is provided at an outer side of the pipe connector and at a position coaxial with the first through hole, and the expansion fixing piece can increase the fixing stroke of the hand screw.

[0008] Specifically, an internal nut is further provided in the expansion fixing piece, and the internal nut can be threadedly connected with the free end of the hand screw.

[0009] Specifically, a dining cart comprises a front leg tube and a rear leg tube, wherein the front leg tube is provided with a front wheel, and the rear leg tube is provided with a rear wheel, wherein the rear leg tube is fixed at one side of the front leg tube, and one end of the front leg tube extends upward to form an armrest, wherein a dining tray assembly is connected to the lower end of the armrest, and wherein the front leg tube and the rear leg tube are both provided with the aforementioned double-tube tool-free quick-release connection mechanism.

[0010] Specifically, the first connecting tube on the front leg tube extends upward to form a handrail, the lower end of the second connecting tube on the front leg tube is equipped with a front wheel, one end of the first connecting tube on the rear leg tube is fixedly connected to one end of the first connecting tube on the front leg tube, and the lower end of the second connecting tube on the rear leg tube is equipped with a rear wheel.

[0011] Specifically, the pipe connector on the front leg tube is a three-way structure, a fixed pipe is connected between the two pipe connectors, and the pipe connector on the rear leg tube is a double-way structure.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model provides a double-tube tool-free quick-release connecting mechanism and a dining cart. The connecting mechanism can help the second connecting pipe and the pipe connecting piece to achieve tool-free quick release and quick connection by arranging spring pieces and hand screws. The connecting mechanism is applied to dining carts, so that the front leg pipe and the rear leg pipe of the dining cart can be quickly disassembled without tools, and can be quickly plugged in and locked back during subsequent assembly. After disassembling a large part of the front leg pipe and the rear leg pipe, the volume of the entire dining cart can be reduced by more than half, and the storage cost and logistics cost when leaving the factory can be effectively reduced. At the same time, consumers can receive the products themselves and can quickly assemble them without going through complicated installation procedures, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 :The overall structure of a double-tube tool-free quick-release connection mechanism Figure 1 ;

[0015] Figure 2 :The overall structure of a double-tube tool-free quick-release connection mechanism Figure 2 ;

[0016] Figure 3 :It is an overall structural assembly drawing of a dining car;

[0017] Figure 4 :It is an exploded view of the overall structure of a dining car;

[0018] Figure 5 : A radial cross section of a double-tube tool-free quick-release connection mechanism Figure 1 ;

[0019] Figure 6 : A radial cross section of a double-tube tool-free quick-release connection mechanism Figure 2 ;

[0020] In the figure: pipe connector 1, first tube cavity 11, second tube cavity 12, first through hole 121, first inner locking hole 122, first connecting tube 2, second connecting tube 3, second through hole 31, second inner locking hole 32, spring piece 4, hand screw 5, elastic plug shaft 41, third through hole 111, fourth through hole 21, front leg tube 5, rear leg tube 6, front wheel 51, rear wheel 61, armrest 7, dining plate assembly 8, expansion fixing piece 123, internal nut 123a. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0022] refer to Figures 1 to 6 :

[0023] The utility model discloses a double-tube tool-free quick-release connection mechanism, including a tube connector 1, wherein the tube connector 1 has a first tube cavity 11 and a second tube cavity 12 opening toward both sides, and the preferred tube connector 1 is a three-way tube and a two-way tube, wherein the second tube cavity 12 is provided with a first through hole 121 and a first inner locking hole 122; it also includes a first connecting tube 2 and a second connecting tube 3, wherein the first connecting tube 2 is fixedly plugged into the first tube cavity 11; the fixing method can be welding or bolt connection, the second connecting tube 3 is provided with a second through hole 31 and a second inner locking hole 32 and can be movably plugged into the second tube cavity 12; it also includes a spring piece 4 and a hand screw 5, wherein the hand screw 5 can pass through the first through hole 121 and the second through hole 31 in sequence, wherein the spring piece 4 is embedded in the second connecting tube 3 and can pass through the first inner locking hole 122 and the second inner locking hole 32 through the elastic plug shaft 41 on one side thereof to connect the second connecting tube 3 and the tube connector 1, because an elastic property of the spring piece 4, the spring screw 5 can be used to connect the second connecting tube 3 and the tube connector 1. When unlocking is needed, first loosen and pull out the hand screw 5, then press the elastic plug shaft 41 in the inner direction of the first inner locking hole 122 and the second inner locking hole 32 coaxially to make it disengage from the first inner locking hole 122, so that the second connecting tube 3 can be pulled out. After the second connecting tube 3 is pulled out, the elastic plug shaft 41 still extends out of the second inner locking hole 32, and the other end of the spring sheet 4 can directly use its elastic abutment to abut against the inner wall of the second connecting tube 3. Thus, the spring sheet 4 and the hand screw 5 are used to realize tool-free quick locking and unlocking of the second connecting tube 3 and the second tube cavity 12. As mentioned above, it should be noted that there is no clear dividing line between the first tube cavity 11 and the second tube cavity 12. The two tube cavities can be connected or not connected, and can be conveniently designed according to the production mold.

[0024] Specifically, the first tube cavity 11 is provided with a third through hole 111, the first connecting tube 2 is provided with a fourth through hole 21, and the fixing bolt passes through the third through hole 111 and the fourth through hole 21 to fix the first connecting tube 2 and the tube connecting tube.

[0025] Specifically, among various products that use connecting pipes as connecting frames, most of them use round pipes as the main frame. Because the thickness of the pipe wall is limited, various through holes are prone to loosening when connected with the hand screw 5 using threads. Here, an expansion fixing member 123 is provided on the outer side of the pipe connector 1 at a position coaxial with the first through hole 121. The expansion fixing member 123 can increase the fixing stroke of the hand screw 5. As one of the embodiments, the expansion fixing member 123 is also provided with an internal nut 123a, and the internal nut 123a can be screwed with the free end of the hand screw 5. As other optional embodiments, a redundant N-shaped fixing plate is also provided on the outer side of the expansion fixing member 123, and an additional screw hole is provided on the fixing plate, thereby realizing that the hand screw 5 is screwed with this screw hole when it passes through the first through hole 121. In this way, the hand screw 5 has three screw holes connected to it, and is not easy to loosen.

[0026] The utility model patent also discloses a dining car, including a front leg tube 5 and a rear leg tube 6, wherein the front leg tube 5 is provided with a front wheel 51, and the rear leg tube 6 is provided with a rear wheel 61, wherein the rear leg tube 6 is fixed on one side of the front leg tube 5, and one end of the front leg tube 5 extends upward to form an armrest 7, and a dining tray assembly 8 is connected to the lower end of the armrest 7, and the front leg tube 5 and the rear leg tube 6 are both provided with the aforementioned double-tube tool-free quick-release connection mechanism.

[0027] Specifically, the first connecting tube 2 on the front leg tube 5 extends upward to form a handrail 7, a front wheel 51 is installed at the lower end of the second connecting tube 3 on the front leg tube 5, one end of the first connecting tube 2 on the rear leg tube 6 is fixedly connected to one end of the first connecting tube 2 on the front leg tube 5, and a rear wheel 61 is installed at the lower end of the second connecting tube 3 on the rear leg tube 6.

[0028] Specifically, the pipe connector 1 on the front leg tube 5 is a three-way structure, a fixed pipe is connected between the two pipe connectors 1, and the pipe connector 1 on the rear leg tube 6 is a double-way structure.

[0029] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A double-tube tool-free quick-release connection mechanism, characterized in that: include: A tube connector, the tube connector having a first tube cavity and a second tube cavity open toward both sides, wherein the second tube cavity is provided with a first through hole and a first inner locking hole; A first connecting tube, fixedly plugged into the first tube cavity; The second connecting tube is provided with a second through hole and a second inner locking hole and can be movably plugged into the second tube cavity; It also includes a spring piece and a hand screw, wherein the spring piece is embedded in the second connecting tube and can pass through the first inner locking hole and the second inner locking hole through an elastic plug shaft on one side of the spring piece, and the hand screw can pass through the first through hole and the second through hole in turn, thereby realizing the rapid locking and unlocking of the second connecting tube and the second tube cavity.

2. A double-tube tool-free quick-release connection mechanism as claimed in claim 1, characterized in that: The first tube cavity is provided with a third through hole, the first connecting tube is provided with a fourth through hole, and the fixing bolt passes through the third through hole and the fourth through hole to fix the first connecting tube and the tube connecting tube.

3. A double-tube tool-free quick-release connection mechanism as claimed in claim 2, characterized in that: An expansion fixing piece is provided on an outer side of the pipe connector at a position coaxial with the first through hole, and the expansion fixing piece can increase the fixing stroke of the hand screw.

4. A double-tube tool-free quick-release connection mechanism as claimed in claim 3, characterized in that: An internal nut is also provided in the expansion fixing piece, and the internal nut can be threadedly connected with the free end of the hand screw.

5. A dining cart, comprising a front leg tube and a rear leg tube, wherein the front leg tube is provided with a front wheel, the rear leg tube is provided with a rear wheel, the rear leg tube is fixed to one side of the front leg tube, one end of the front leg tube extends upward to form an armrest, the lower end of the armrest is connected to a dining tray assembly, wherein: The front leg tube and the rear leg tube are both provided with a double-tube tool-free quick-release connection mechanism as described in any one of claims 1 to 4.

6. A dining car as claimed in claim 5, characterized in that: The first connecting tube on the front leg tube extends upward to form an armrest, the lower end of the second connecting tube on the front leg tube is equipped with a front wheel, one end of the first connecting tube on the rear leg tube is fixedly connected to one end of the first connecting tube on the front leg tube, and the lower end of the second connecting tube on the rear leg tube is equipped with a rear wheel.

7. A dining car as claimed in claim 5, characterized in that: The pipe connector on the front leg tube is a three-way structure, a fixed pipe is connected between the two pipe connectors, and the pipe connector on the rear leg tube is a double-way structure.

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