Hotel service cart convenient to use in narrow space and comfortable to hold

Abstract

The utility model discloses a hotel service cart convenient to use in a narrow space and comfortable to hold. The hotel service cart comprises a bearing plate frame, and a plurality of idler wheels are installed at the bottom of the bearing plate frame. The bearing plate frame is at least provided with two handrails, the two handrails are installed on the two opposite sides of the bearing plate frame and located at the same horizontal position, and a worker only needs to move towards the handrails in the opposite directions when needing to steer by a large margin; one handrail is at least provided with two inclined holding rod parts, the two inclined holding rod parts are in mirror symmetry in the vertical direction, the two close ends of the two inclined holding rod parts are directly or indirectly connected and are arranged as fixed ends, and the two opposite ends of the inclined holding rod parts are installed and fixed on the bearing plate frame and are arranged as free ends; the two inclined holding rod parts which are in mirror symmetry in the vertical direction are specifically designed, the formed approximate inverted-V-shaped structure better conforms to the natural angle of the palm and the wrist when a hotel worker grabs the handrail, the pressure of the wrist is relieved, and the more comfortable grabbing hand feeling is provided for the worker.

Description

Technical Field

[0001] The utility model belongs to the field of service carts, and particularly relates to a hotel service cart which is convenient to use in narrow spaces and has a comfortable grip feeling. Background Art

[0002] Hotel service carts are generally used by staff to provide various services such as meal delivery, item delivery, cleaning, etc. They are usually equipped with a supporting and accommodating structure for placing items, rollers, handrails, etc., and can be conveniently pushed through the hotel by hand.

[0003] For example, the patent document with the application number CN201922473529.6 discloses a hotel convenient storage meal cart. A heating rack and a cold dish rack are fixedly installed on the handrail rack, and the heating rack is located above the cold dish rack. A support plate is arranged below the cold dish rack, and rubber shock-absorbing mechanisms are arranged at the four corners between the support plate and the cold dish rack, and the rubber shock-absorbing mechanisms are fixedly connected to the support plate and the cold dish rack. A plurality of springs are arranged at the middle position between the support plate and the cold dish rack.

[0004] Another example is the patent document with the application number CN200810244081.4, which discloses a service cart with double-opening drawers, including a vehicle frame. One or more tool trays are arranged on the vehicle frame. Handrails are arranged on the side of the upper tool tray. Universal wheels are arranged at the bottom of the lower tool tray. A double-opening drawer installed on the vehicle frame is arranged below the upper tool tray and can be opened in two directions, forward and backward respectively.

[0005] The main body structures of the handrails in the above-mentioned prior arts are all horizontal straight rods, which do not fit well with the natural state of the human hands when grasping items forward, easily form a large pressure on the wrists and are not convenient for the staff to apply force to push the service cart forward. At the same time, most hotel corridors are relatively narrow. It is more inconvenient for a service cart with a handrail arranged on one side to make a large turn, and it needs to occupy most of the hotel corridor for a short time, affecting the passage of other people such as guests. Summary of the Invention

[0006] In view of the problems in the related technologies, the utility model provides a hotel service cart which is convenient to use in narrow spaces and has a comfortable grip feeling, so as to overcome the above-mentioned technical problems existing in the related prior arts.

[0007] The technical solution of the utility model is realized as follows:

[0008] A hotel service cart which is convenient to use in narrow spaces and has a comfortable grip feeling includes a supporting plate frame, and a plurality of rollers are installed at the bottom of the supporting plate frame;

[0009] At least two handrails are installed on the supporting plate frame, and the two handrails are installed on opposite sides of the supporting plate frame and are located at the same horizontal position;

[0010] At least one of the armrests has at least two obliquely-gripping rod portions. The two obliquely-gripping rod portions are mirror-symmetrical in the vertical direction. The two ends of the two obliquely-gripping rod portions that are close to each other are directly or indirectly connected, which is set as the fixed end. The two ends of the obliquely-gripping rod portions that are away from each other are fixedly installed on the support plate frame, which is set as the free end.

[0011] Preferably, the free ends of the two obliquely-gripping rod portions extend sequentially in the horizontal direction, then extend in the same direction perpendicular to the obliquely-gripping rod portions, and then extend downward to form insertion portions adapted to the slots.

[0012] The top surface of the support plate frame is recessed downward to form two slots adapted to the insertion portions.

[0013] Preferably, at least part of the outer peripheral wall of the insertion portion forms an interference fit with the inner peripheral wall of the slot, and through holes are provided at the bottom of the slot.

[0014] More preferably, the free ends of the two obliquely-gripping rod portions extend in opposite horizontal directions respectively to form two symmetrical transition segments.

[0015] The free ends of the two transition segments extend in the same direction perpendicular to the obliquely-gripping rod portions to form two symmetrical turning segments.

[0016] The free ends of the two turning segments extend downward and expand to form two strengthening segments.

[0017] The outer peripheral dimensions of the free ends of the two strengthening segments are reduced and extend downward to form the two insertion portions.

[0018] Preferably, the two fixed ends of the two obliquely-gripping rod portions that are close to each other are integrally formed and connected. The middle top of the two obliquely-gripping rod portions is recessed downward to form a groove.

[0019] The two obliquely-gripping rod portions are suspended outside the service vehicle.

[0020] Preferably, the obliquely-gripping rod portion is an arc-shaped structure with the middle bent obliquely upward.

[0021] Preferably, a plurality of anti-slip ridges are provided on the top surface and the bottom surface of the obliquely-gripping rod portion along the length direction. The plurality of anti-slip ridges are arranged in parallel, and the anti-slip ridges protrude from the outer surface of the obliquely-gripping rod portion.

[0022] Preferably, the interior of the armrest is a hollow structure.

[0023] Preferably, the support plate frame includes a plurality of support plates arranged up and down. The plurality of support plates are connected and supported by a plurality of insertion pipes. Side plates are detachably installed between adjacent insertion pipes.

[0024] The top surface of the uppermost supporting plate is provided with the slot, and the bottom surface of the uppermost supporting plate is provided with a plurality of downwardly protruding insertion bumps;

[0025] The top surface of the lowermost supporting plate is provided with the insertion bumps, and a plurality of the rollers are installed on the bottom surface of the lowermost supporting plate;

[0026] The top surface and the bottom surface of the middle supporting plate are respectively provided with a plurality of upwardly and downwardly protruding insertion bumps;

[0027] The insertion bump is integrally formed with the supporting plate;

[0028] The insertion bump has at least one positioning groove extending from the fixed end to the free end, the positioning groove is formed by being recessed into the interior of the insertion bump, and the positioning groove includes an L-shaped recess with an L-shaped horizontal cross-section and a U-shaped recess with a U-shaped horizontal cross-section;

[0029] The first end of the L-shaped recess extends to the free end of the insertion bump, the first end of the U-shaped recess extends to the fixed end of the insertion bump, and the second end of the L-shaped recess is connected to a part of the second end of the U-shaped recess;

[0030] There is at least one U-shaped recess with opposite openings between adjacent insertion bumps. The insertion tube is a hollow structure that penetrates up and down and is provided with a plate slot recessed inward along the length direction. The insertion tube is sleeved on the insertion bump, and the inner wall at the pipe orifice of the insertion tube forms an interference fit with part or all of the outer side wall of the insertion bump. The horizontal cross-section of the plate slot is U-shaped, and the plate slot is clamped in the U-shaped recess;

[0031] The openings of the plate slots between adjacent insertion tubes are opposite, and both sides of one side plate are respectively slidably clamped in two opposite plate slots.

[0032] Preferably, the insertion bump is a hollow three-stage cylindrical structure. The outer peripheral width of the three-stage cylinder gradually decreases from the fixed end to the free end of the insertion bump, and is respectively set as a wide-stage cylinder, a middle-stage cylinder, and a narrow-stage cylinder. The three-stage cylinders are connected by inclined surfaces;

[0033] The wide-stage cylinder is provided with the U-shaped recess, and the middle-stage cylinder and the narrow-stage cylinder are provided with the L-shaped recess.

[0034] Advantages of the present utility model:

[0035] Compared with the prior art, the present utility model specifically designs two obliquely gripped rod parts that are vertically mirror-symmetrical. The formed approximate inverted V-shaped structure is more in line with the natural angles of the palm and wrist when hotel staff grasp the handrail, reducing the pressure on the wrist and providing a more comfortable grasping feel for the staff;

[0036] On the other hand, considering that the corridors of most hotels are relatively narrow and it is inconvenient for staff to push the service cart for large-angle turning, the present utility model installs two handrails at the relative positions of the supporting plate frame. When the staff needs to make a large-angle turn, they only need to walk towards the handrail in the opposite direction, without having to push and turn the service cart significantly for large-angle turning. The movement is more stable, and the items on the service cart are not easily spilled, toppled, or dropped. At the same time, it also avoids the problem that the service cart needs to occupy most of the hotel corridor for a short time during large-angle turning, and other people such as guests can walk through normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural diagram of the present utility model;

[0038] Figure 2 is one of the schematic structural diagrams of the present utility model;

[0039] Figure 3 is the second schematic structural diagram of the present utility model;

[0040] Figure 4 is the third schematic structural diagram of the present utility model;

[0041] Figure 5 is one of the schematic structural diagrams of the supporting plate of the present utility model;

[0042] Figure 6 is Figure 5 an enlarged view of part A of

[0043] Figure 7 is the second schematic structural diagram of the supporting plate of the present utility model;

[0044] Figure 8 is Figure 7 an enlarged view of part B of

[0045] Figure 9 is the schematic structural diagram of the insertion tube of the present utility model.

[0046] MARKING DESCRIPTION:

[0047] 1. Handrail;

[0048] 101. Oblique grip rod part; 101a. Anti-slip convex strip; 102. Transition section; 103. Steering section; 104. Reinforcement section; 105. Insertion part; 106. Groove;

[0049] 2. Supporting plate;

[0050] 201. Slot; 201a. Air hole; 202. Insertion convex block; 202a. L-shaped depression; 202b. U-shaped depression; 202c. Narrow-step cylinder; 202d. Medium-step cylinder; 202e. Wide-step cylinder;

[0051] 3. Insertion tube; 301. Plate slot

[0052] 4. Side plate

[0053] 5. Roller Specific implementation manner

[0054] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0055] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0056] As Figures 1 to 9 shown, a hotel service cart that is convenient to use in a narrow space and has a comfortable grip includes a supporting plate frame, and a plurality (four) of rollers 5 are installed at the bottom of the supporting plate frame.

[0057] At least two handrails 1 are installed on the supporting plate frame, and the two handrails 1 are installed on opposite sides of the supporting plate frame and are located at the same horizontal position; specifically, the two handrails 1 in this embodiment are installed at opposite positions on the top surface of the supporting plate frame.

[0058] One of the handrails 1 has two inclined grip portions 101, the two inclined grip portions 101 are vertically mirror-symmetrical, and the two ends of the two inclined grip portions 101 that are close to each other are directly or indirectly connected, which is set as the fixed end, and the two ends of the inclined grip portions 101 that are away from each other are fixedly installed on the supporting plate frame, which is set as the free end.

[0059] Compared with the prior art, in this embodiment, two inclined grip portions 101 that are vertically mirror-symmetrical are specifically designed, and the formed approximate inverted V-shaped structure is more in line with the natural angles of the palm and wrist when hotel staff grasp the handrail 1, reducing the pressure on the wrist and providing a more comfortable gripping feel for the staff;

[0060] On the other hand, considering that the corridors of most hotels are relatively narrow and it is inconvenient for the staff to push the service cart for large-angle turning, in this embodiment, two handrails 1 are installed at the relative positions of the supporting plate frame. When the staff needs to make a large-angle turn, they only need to walk towards the handrail 1 in the opposite direction, without having to push and turn the service cart significantly for large-angle turning. The movement is more stable, and the items on the service cart are not easily spilled, toppled, or dropped. At the same time, it also avoids the problem that the service cart needs to occupy most of the hotel corridor for a short time during large-angle turning, and other people such as guests can walk through normally.

[0061] The handrail 1 can be installed and fixed to the supporting plate frame by means of screws, gluing, etc. In this embodiment, the free ends of the two inclined grip portions 101 extend horizontally in sequence, then extend in the same direction perpendicular to the inclined grip portion 101, and then extend downward to form a plug-in portion 105 adapted to the slot 201; the top surface of the supporting plate frame is recessed downward to form two slots 201 adapted to the plug-in portion 105, and the installation of the handrail 1 can be completed by plugging.

[0062] Specifically, at least part of the outer peripheral wall of the plug-in portion 105 forms an interference fit with the inner peripheral wall of the slot 201, and the connection is relatively stable. If the bottom of the slot 201 is a closed structure, when the plug-in portion 105 is pressed and inserted into the slot 201, the air in the slot 201 will be squeezed, and a slight blockage may be formed during assembly. Therefore, a through hole 201a is provided at the bottom of the slot 201 in this embodiment for the air in the slot 201 to be discharged from the through hole 201a during assembly.

[0063] In this embodiment, the free ends of the two inclined grip portions 101 extend horizontally in opposite directions respectively to form two symmetrical transition sections 102; the free ends of the two transition sections 102 extend in the same direction perpendicular to the inclined grip portion 101 to form two symmetrical turning sections 103; a structure with smooth transition is designed to avoid stress concentration areas as much as possible.

[0064] The free ends of the two turning sections 103 extend downward and expand to form two strengthening sections 104. This position is the main stress-bearing position. By increasing the size of this position, the structural strength is improved, and at the same time, it serves as a limiting structure for the plug-in portion 105 to be installed in place, avoiding structural cracking caused by excessive force when assembling the handrail 1 to press down the plug-in portion 105.

[0065] The outer peripheral dimensions of the free ends of the two strengthening sections 104 "suddenly" shrink towards the center in the horizontal direction and extend downward to form the two plug-in portions 105, and the connection structure between the fixed end of the plug-in portion 105 and the free end of the strengthening section 104 is a horizontal toroidal surface.

[0066] The outer peripheral dimensions of the two plug-in parts 105 gradually decrease from the fixed end to the free end, facilitating the alignment and insertion of the plug-in part 105 into the slot 201.

[0067] In this embodiment, the fixed ends of the two inclined grip rod parts 101 close to each other are integrally formed and connected. A groove 106 is formed by the downward depression at the middle top of the two inclined grip rod parts 101. The functions are as follows: First, hotels generally have multiple service carts and need to number the service carts for convenient management. The groove 106 can be used by hotels to paste the service cart numbers. Second, staff often use the handrail 1 to hang some small items. The design of the groove 106 can limit the sliding of small items.

[0068] The two inclined grip rod parts 101 are suspended outside the service cart, reserving space for hanging items.

[0069] In this embodiment, the inclined grip rod part 101 is an arc-shaped structure bent obliquely upward in the middle. Compared with the straight inclined grip rod part 101, it is more in line with the shape of the palm after being circled.

[0070] Anti-slip convex strips 101a are provided along the length direction on the top surface and the bottom surface of the inclined grip rod part 101. The multiple anti-slip convex strips 101a are arranged in parallel. The anti-slip convex strips 101a protrude from the outer surface of the inclined grip rod part 101, increasing the friction force at this position with the palm when the palm circles the inclined grip rod part 101, facilitating the staff to apply force to push this embodiment

[0071] The handrail 1 can be prepared by blow molding process. The inside of the handrail 1 is a hollow structure, reducing the weight of this embodiment.

[0072] In this embodiment, the support plate frame includes three rectangular support plates 2 arranged vertically. The three support plates 2 are connected and supported by eight insertion tubes 3. Side plates 4 are detachably installed between adjacent insertion tubes 3.

[0073] Slots 201 are provided at the four corners of the top surface of the uppermost support plate 2, and downwardly protruding insertion bumps 202 are provided at the four corners of the bottom surface of the uppermost support plate 2;

[0074] Upwardly protruding insertion bumps 202 are provided at the four corners of the top surface of the lowermost support plate 2, and four rollers 5 are installed on the bottom surface of the lowermost support plate 2;

[0075] Upwardly and downwardly protruding insertion bumps 202 are respectively provided at the four corners of the top surface and the bottom surface of the middle support plate 2;

[0076] The insertion bump 202 is integrally formed with the support plate 2;

[0077] The plugging bump 202 has two positioning grooves extending from the fixed end towards the free end. The positioning grooves are formed by being recessed into the interior of the plugging bump 202. The positioning grooves include an L-shaped recess 202a with an L-shaped horizontal cross-section and a U-shaped recess 202b with a U-shaped horizontal cross-section.

[0078] The first end of the L-shaped recess 202a extends to the free end of the plugging bump 202. The first end of the U-shaped recess 202b extends to the fixed end of the plugging bump 202. The second end of the L-shaped recess 202a is connected to a part of the second end of the U-shaped recess 202b.

[0079] Between adjacent plugging bumps 202, there is a U-shaped recess 202b with its opening facing each other. The plugging tube 3 is a hollow structure that penetrates up and down and has a plate slot 301 recessed inward along its length direction. The plugging tube 3 is sleeved outside the plugging bump 202. The inner wall at the pipe orifice of the plugging tube 3 forms an interference fit with a part of the outer side wall of the plugging bump 202. The horizontal cross-section of the plate slot 301 is U-shaped, and the plate slot 301 is clamped in the U-shaped recess 202b.

[0080] The openings of the plate slots 301 between adjacent plugging tubes 3 face each other. Both sides of a side plate 4 are slidably clamped in two opposite plate slots 301 respectively.

[0081] There are certain alignment accuracy requirements for the openings of the plate slots 301 for inserting both sides of the side plate 4. This requirement is transformed and completed during production preparation, that is, for the plugging bumps 202 integrally formed with the supporting plate 2, the manufacturer has highly accurately aligned the U-shaped recesses 202b of adjacent plugging bumps 202 during the mold design of the supporting plate 2. Thus, the plate slots 301 clamped in the U-shaped recesses 202b of the plugging bumps 202 also have high-precision alignment, so as to ensure the smooth insertion of the side plate 4.

[0082] Secondly, based on the above design, the width of the plate slot 301 can be designed to be relatively small without reserving a tolerance space for the alignment and installation of the side plate 4, that is, it is relatively close to the width of the side plate 4. After the side plate 4 is installed, it is more stable and is not likely to generate noise due to bumping. In this embodiment, the sound during pushing and walking is smaller, meeting the low-noise requirements of hotels.

[0083] Again, if the U-shaped recess 202b of the plug-in bump 202 extends to the top end of the plug-in bump 202, it needs to be specifically aligned when assembling the insertion tube 3. Moreover, the structure of the thinner side of the U-shaped recess 202b has relatively weak structural strength and is not easy to be designed too high or too protruding, and is easily damaged by bumps. Therefore, in this embodiment, it is designed at the fixed end of the plug-in bump 202, which does not affect its above-mentioned "alignment" function. At the same time, the L-shaped recess 202a connected to it is designed, and the structure is relatively open, which is convenient for the insertion tube 3 to be quickly inserted into the plug-in bump 202, and then the insertion tube 3 can be guided to slide down and inserted into the U-shaped recess 202b by using the structure.

[0084] Finally, in this embodiment, the stacking layers and the number of installation side plates 4 can be selectively stacked according to actual needs, and the assembly method is diversified, making it more flexible to use.

[0085] In this embodiment, the plug-in bump 202 is a hollow three-layer stepped cylinder structure. The outer peripheral width of the three-layer stepped cylinder gradually decreases from the fixed end to the free end of the plug-in bump 202, and is respectively set as the wide stepped cylinder 202e, the middle stepped cylinder 202d, and the narrow stepped cylinder 202c. The three-layer stepped cylinders are connected by inclined surfaces to facilitate the quick assembly of the insertion tube 3.

[0086] The U-shaped recess 202b is arranged on the wide stepped cylinder 202e, and the L-shaped recess 202a is arranged on the middle stepped cylinder 202d and the narrow stepped cylinder 202c.

[0087] According to the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A hotel service cart that is convenient to use in narrow spaces and has a comfortable grip, characterized in that, It includes a supporting plate frame, and a plurality of rollers are installed at the bottom of the supporting plate frame; At least two armrests are installed on the supporting plate frame, and the two armrests are installed on opposite sides of the supporting plate frame and are located at the same horizontal position; One of the armrests has at least two inclined grip rod parts, and the two inclined grip rod parts are mirror-symmetrical in the vertical direction. The two ends of the two inclined grip rod parts that are close to each other are directly or indirectly connected, which is set as the fixed end, and the opposite ends of the inclined grip rod parts are fixedly installed on the supporting plate frame, which is set as the free end.

2. The hotel service cart that is convenient to use in a narrow space and has a comfortable grip according to claim 1, wherein The free ends of the two inclined grip rod parts extend horizontally in sequence, then extend in the same direction perpendicular to the inclined grip rod parts, and then extend downward to form a plug-in part adapted to the plug slot; The top surface of the supporting plate frame is recessed downward to form two plug slots adapted to the plug-in parts.

3. The hotel service cart according to claim 2, which is convenient to use in a narrow space and has a comfortable grip, is characterized in that At least a part of the outer peripheral wall of the plug-in part forms an interference fit with the inner peripheral wall of the plug slot, and a through air hole 201a is provided at the bottom of the plug slot.

4. The hotel service cart according to claim 2, which is convenient to use in a narrow space and has a comfortable grip, is characterized in that, The free ends of the two inclined grip rod parts extend in opposite horizontal directions respectively, forming two symmetrical transition sections; The free ends of the two transition sections extend in the same direction perpendicular to the inclined grip rod parts, forming two symmetrical turning sections; The free ends of the two turning sections extend downward and expand, forming two strengthening sections; The outer peripheral dimensions of the free ends of the two strengthening sections are reduced and extend downward, forming the two plug-in parts.

5. The hotel service cart that is convenient to use in a narrow space and has a comfortable grip according to any one of claims 1 to 4, wherein The fixed ends of the two inclined grip rod parts that are close to each other are integrally connected, and the middle top of the two inclined grip rod parts is recessed downward to form a groove; The two inclined grip rod parts are suspended outside the service vehicle.

6. The hotel service cart that is convenient to use in a narrow space and has a comfortable grip according to any one of claims 1 to 4, characterized in that, The inclined grip rod part is an arc-shaped structure with the middle bent obliquely upward.

7. The hotel service cart that is convenient to use in narrow spaces and has a comfortable grip according to any one of claims 1 to 4, characterized in that, Anti-slip convex strips are provided on the top surface and the bottom surface of the inclined grip rod part along the length direction, and a plurality of the anti-slip convex strips are arranged in parallel, and the anti-slip convex strips protrude from the outer surface of the inclined grip rod part.

8. The hotel service cart that is convenient to use in a narrow space and has a comfortable grip according to any one of claims 1 to 4, characterized in that, The interior of the armrest is a hollow structure.

9. The hotel service cart which is convenient to use in a narrow space and has a comfortable grip according to any one of claims 2 to 4, characterized in that, The supporting plate frame includes a plurality of supporting plates arranged up and down, and the plurality of supporting plates are connected and supported by a plurality of insertion tubes. Side plates are detachably installed between adjacent insertion tubes; The plug slot is provided on the top surface of the uppermost supporting plate, and a plurality of downward protruding plugging convex blocks are provided on the bottom surface of the uppermost supporting plate; The plugging convex blocks are provided on the top surface of the lowermost supporting plate, and a plurality of the rollers are installed on the bottom surface of the lowermost supporting plate; A plurality of upward and downward protruding plugging convex blocks are respectively provided on the top surface and the bottom surface of the middle supporting plate; The plugging convex block is integrally formed with the supporting plate; The plugging convex block has at least one positioning groove extending from the fixed end to the free end direction, the positioning groove is recessed into the interior of the plugging convex block, and the positioning groove includes an L-shaped depression with an L-shaped horizontal cross-section and a U-shaped depression with a U-shaped horizontal cross-section; The first end of the L-shaped depression extends to the free end of the plugging convex block, the first end of the U-shaped depression extends to the fixed end of the plugging convex block, and the second end of the L-shaped depression is connected to a part of the second end of the U-shaped depression; There is at least one U-shaped depression with opposite openings between adjacent plugging bumps. The plugging tube is a hollow structure that penetrates up and down and is provided with a plate slot that is recessed inward along the length direction. The plugging tube is sleeved outside the plugging bumps. The inner wall at the pipe orifice of the plugging tube forms a transition fit with part or all of the outer side walls of the plugging bumps. The horizontal cross-sectional shape of the plate slot is U-shaped, and the plate slot is clamped in the U-shaped depression; The openings of the plate slots between adjacent plugging tubes are opposite, and both sides of one side plate are respectively slidably clamped in two opposite plate slots.

10. The hotel service cart according to claim 9, which is convenient to use in a narrow space and has a comfortable grip, is characterized in that, The plugging bump is a hollow three-step cylinder structure. The outer circumferential width of the three-step cylinder gradually decreases from the fixed end to the free end of the plugging bump, and is respectively set as a wide-step cylinder, a middle-step cylinder, and a narrow-step cylinder. The three-step cylinders are connected by inclined surfaces; The wide-step cylinder is provided with the U-shaped depression, and the middle-step cylinder and the narrow-step cylinder are provided with the L-shaped depression.

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