A plastic cabinet body formed by integral injection molding

Abstract

A plastic cabinet with an integral injection-molded body includes a supporting base plate and a locking frame. Four uprights are located at the four corners between the supporting base plate and the locking frame. A right side panel, a left side panel, and a back panel are located between the supporting base plate, the locking frame, and the uprights. A front panel is fixedly connected to the two uprights at the front of the locking frame. Screw-fitting protrusions and transverse reinforcing ribs for installing drawer slides are provided on the inner surfaces of the right side panel and the left side panel. Vertical clearance notches are provided at the four corners of the upper locking frame, extending along the uprights to the upper surface of the supporting base plate. A fixing structure for easy installation of the top cover is provided at the upper end of the locking frame. Locking holes are provided on the front panel. The supporting base plate, right side panel, left side panel, back panel, uprights, vertical clearance notches, front panel, and locking frame are an integral molding structure.

Description

Technical Field

[0001] This invention relates to the field of medical trolley technology, specifically to a cabinet for a plastic trolley. Background Technology

[0002] Cart cabinets are indispensable in nursing carts in the medical field and various storage carts in daily life. There are two main types of existing food cart cabinets. The first type is a cabinet with an integral structure welded from stainless steel plates. This type of cabinet can only have a simple box structure. The installation of drawer slides requires additional fixed support welding parts. The addition and use of extension parts on the cart are greatly limited. At the same time, this type of cabinet can only be produced in small batches, which results in high manufacturing costs and long production cycles. Moreover, the appearance quality, such as the smoothness and aesthetics of the welding joints, cannot meet the requirements of hospitals and other users.

[0003] The second type involves the applicant producing plastic-pressed, assembled trolley cabinets. Both CN202010890774.1 "A Medical Trolley with Front and Rear Interlocking Top Plate" and CN202010890585.4 "Rear Connecting Profile of a Split-Assembled Medical Trolley" describe the applicant's development of split-type press-molded trolley cabinets. While these designs have many advantages, they suffer from low overall compressive strength, especially in lateral impact resistance. In actual use, the cabinet is prone to disintegration when subjected to unexpected lateral impacts. Furthermore, the left and right side panels, bottom panel, back panel, and front frame all require different molds for pressing, necessitating numerous pressing equipment and precise assembly of each part, demanding high pressing accuracy. Currently, hospitals are placing higher demands on medical trolley technology, hoping to develop integrally pressed plastic trolley cabinets that improve overall compressive and impact resistance while controlling manufacturing costs.

[0004] Because medical trolley cabinets require drawers of different sizes to be installed inside, and special connection structures for installing extension parts for different purposes to be added externally, if the structural design is unreasonable, it will not only affect the overall compressive strength and lateral impact resistance of the cabinet, but also prevent the smooth installation of drawer slides, extension parts, etc., and make it impossible to demold. More seriously, it will cause deformation of the overall cabinet pressing parts, resulting in a low yield rate. Therefore, the structural design of the overall pressed plastic medical cabinet is very critical. So far, there are no relevant reports in the entire medical trolley industry, which is also a problem that the industry urgently needs to solve but has not yet solved. Summary of the Invention

[0005] The purpose of this invention is to provide a plastic cabinet with integral injection molding, which can meet the new market requirements mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A plastic cabinet with an integral injection-molded body is characterized by: a supporting base plate and a locking frame; four uprights positioned at the four corners between the supporting base plate and the locking frame; a right side panel, a left side panel, and a back panel positioned between the supporting base plate, the locking frame, and the uprights; a front horizontal panel fixedly connected to the locking frame and the two front uprights; a right-hand rotating protrusion and a right-hand horizontal reinforcing rib for installing drawer slides on the inner side of the right side panel; the inner side structure of the left side panel corresponding to the inner side structure of the right side panel; vertical clearance notches at the four corners of the upper locking frame extending along the uprights to the upper surface of the supporting base plate; a fixing structure for easy installation of the top cover at the upper end of the locking frame; and lock holes on the front horizontal panel. The supporting base plate, right side panel, left side panel, back panel, uprights, front horizontal panel, and locking frame are an integrally molded structure.

[0007] Furthermore, side holes are provided on the left and / or right side panels to allow for the installation of the sub-platform.

[0008] Furthermore, the vertical clearance notch has a U-shaped cross-section with the opening facing inward.

[0009] Furthermore, the cross-sectional shape of the vertical clearance notch is a quadrilateral notch or an arc notch, with the notch facing inward.

[0010] Furthermore, the longitudinal section of the engagement frame is U-shaped or "I"-shaped, which includes an upper reinforcing side, a vertical side, a lower reinforcing side, and a groove. The width of the upper reinforcing side is less than or equal to the width of the lower reinforcing side, and the upper reinforcing side, the vertical side, and the lower reinforcing side form the groove.

[0011] Another structural design for the left and right side panels involves a left-hand spiral protrusion and a left transverse reinforcing rib on the inner side of the left side panel. A left short horizontal rib and a side vertical rib are located above or below the left-hand spiral protrusion. The left-hand spiral protrusion and the left short horizontal rib are connected to the side vertical rib to form a composite reinforcement. The structure of the inner side of the right side panel is the same as that of the left side panel, wherein the left-hand spiral protrusion corresponds to the right-hand spiral protrusion, and the right transverse reinforcing rib corresponds to the left transverse reinforcing rib.

[0012] Furthermore, the supporting base plate includes a base plate body, with downwardly extending edges around the base plate body, caster sleeves at the center of the four corners of the base plate body, circumferentially distributed slow-release ribs around the caster sleeves, and bottom longitudinal reinforcing ribs and bottom transverse reinforcing ribs on the back of the base plate body.

[0013] Furthermore, the four corners of the supporting base plate are provided with rounded edges, and the lower end face of the supporting base plate is provided with concave cross reinforcing ribs, which can greatly improve the stiffness of the supporting base plate.

[0014] Furthermore, a horizontal transverse inner extension reinforcing rib is provided on the inner side of the interlocking frame located on the back plate, and a longitudinal anti-deformation process pull plate is provided on the inner side of the horizontal transverse inner extension reinforcing rib and the front horizontal plate. Triangular ribs are provided at intervals between the horizontal transverse inner extension reinforcing rib and the inner side of the back plate. The setting of the horizontal transverse inner extension reinforcing rib, the longitudinal anti-deformation process pull plate and the triangular rib can reduce the amount of thermal deformation of the pressed part during demolding, and ensure the final one-time molding yield of the present invention.

[0015] Furthermore, the fixing structure is an insert-type snap-fit ​​or a side screw fastening structure.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The supporting base plate, right side plate, left side plate, back plate, uprights, vertical clearance notches, front horizontal plate, and interlocking frame are designed as a single integrated connection structure. This integrally molded plastic cabinet structure design facilitates the integration of screw-on protrusions for installing drawer slides and horizontal reinforcing ribs on the inner surfaces of the left and right side plates through molding. The upper ends of the left side plate, right side plate, back plate, and four uprights are fixedly connected as one unit through the interlocking frame. The lower ends of the left side plate, right side plate, back plate, and four uprights are fixedly connected to the supporting base plate. The interlocking frame connects to the four uprights at the four corners. The joints of the columns are all designed with vertical clearance notches. This structure greatly improves the compressive strength and side impact resistance of the entire medical cabinet. A horizontal inner extension reinforcing rib is set on the inner side of the interlocking frame located on the back panel. A longitudinal anti-deformation process pull plate is set on the inner side of the horizontal inner extension reinforcing rib and the front horizontal plate. Triangular ribs are set at intervals between the horizontal inner extension reinforcing rib and the inner side of the back panel. The setting of the horizontal inner extension reinforcing rib, the longitudinal anti-deformation process pull plate and the triangular rib can reduce the amount of thermal deformation of the pressed part during demolding, ensuring the final one-time molding yield of the invention.

[0017] The pressing scheme of this invention involves setting the interlocking frame downwards. The inner cavity mold core of this invention adopts a three-piece mold core with a centering and moving assembly structure. The middle mold core is fixed on the mold base, and the left and right sides of the middle mold core are designed with symmetrical inclined surfaces. When the left moving mold core and the left moving mold core move synchronously to the position of assembling with the middle mold core, a composite inner mold core is formed. The structure of the composite inner mold core corresponds to the inner cavity structure design of this invention. The outer mold cavity is formed by the left outer template, the right outer template, the upper outer template, and the side plate of the composite inner mold core when they are enclosed at the extension limit position. The outer mold of this invention adopts a three-dimensional four-sided telescopic enclosure. The applicant has applied for patent protection for the composite mold with left and right moving assembly of the inner mold in another case. The specific structure and working principle are described in detail in the title "A Processing Mold for Integrated Molding of Box Body", and will not be described in detail here.

[0018] The base plate has downward-extending edges around its perimeter, and caster sleeves are located at its four corners. Circumferentially distributed cushioning ribs surround the caster sleeves, and longitudinal and transverse bottom reinforcing ribs are located on the back of the base plate. This design not only improves the overall strength of the medical cabinet but also enhances the impact resistance of the caster sleeves. When encountering obstacles or uneven ground during movement, it effectively absorbs the impact force, preventing the caster sleeves from cracking and ensuring the stability of the connection between the casters and the supporting base plate.

[0019] According to the applicant's own testing, the lateral compressive strength of this integral plastic medical cabinet structure, without the top panel connected, is significantly improved compared to the existing assembled structures. The assembled cabinet will fall apart under the aforementioned lateral pressure. The integral structure of this patent will crack under the aforementioned lateral pressure.

[0020] This improvement in lateral compressive strength is something that the applicant and those skilled in the art could not have predicted. This effect is related to the overall structural design, the structural design of the supporting base plate, the right side plate, the left side plate, the back plate, the columns, the front horizontal plate, the interlocking frame, and the structural design between them. Attached Figure Description

[0021] Figure 1 This is a three-dimensional front view of the connection diagram of the present invention; Figure 2 This is a front view of the present invention; Figure 3 for Figure 2 Enlarged view of the central AA section; Figure 4 This is a right-side view of the present invention; Figure 5 This is a top view of the present invention; Figure 6 This is a bottom view of the present invention; Figure 7 This is a schematic diagram of another three-dimensional structure of the present invention, with casters installed.

[0022] In the diagram: 1-Supporting base plate; 2-Right side plate; 3-Left side plate; 4-Back plate; 5-Column; 6-Vertical clearance notch; 7-Front horizontal plate; 8-Interlocking frame; 9-Fixing structure; 11-Base plate body; 12-Downward extension edge; 13-Caser sleeve; 14-Relief rib; 15-Bottom transverse reinforcing rib; 16-Bottom longitudinal reinforcing rib; 17-Inwardly concave cross reinforcing rib; 18-Arched edge; 21-Right-hand joint protrusion; 22-Right transverse reinforcing rib; 31-Side hole; 32-Left-hand joint protrusion; 33-Left transverse reinforcing rib; 34-Left short horizontal rib; 35-Side vertical rib; 71-Lock hole; 81-Upper reinforcing edge; 82-Vertical edge; 83-Lower reinforcing edge; 84-Slot; 85-Horizontal transverse inner extension reinforcing rib; 86-Longitudinal anti-deformation process pull plate; 87-Triangular rib. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1: A plastic cabinet formed by integral injection molding, such as... Figure 1-6 As shown, the structure includes a supporting base plate 1 and a snap-fit ​​frame 8. Four uprights 5 are positioned at the four corners between the supporting base plate 1 and the snap-fit ​​frame 8. A right side plate 2, a left side plate 3, and a back plate 4 are positioned between the supporting base plate 1, the snap-fit ​​frame 8, and the uprights 5. A front horizontal plate 7 is fixedly connected to the snap-fit ​​frame 8 and the two front uprights 5. On the inner side of the right side plate 2, there is a right-hand rotating protrusion 21 and a right transverse reinforcing rib 22 for installing drawer slides. The inner side structure of the left side plate 3 corresponds to the inner side structure of the right side plate 2. Vertical clearance notches 6 are provided at the four corners of the upper snap-fit ​​frame 8. The vertical clearance notches 6 extend along the uprights 5 to the upper surface of the supporting base plate 1. A fixing structure 9 for easy installation of the top cover is provided at the upper end of the snap-fit ​​frame 8. A lock hole 71 is provided on the front horizontal plate 7. The supporting base plate 1, right side plate 2, left side plate 3, back plate 4, uprights 5, front horizontal plate 7, and snap-fit ​​frame 8 are an integrated integral molded structure.

[0025] The supporting base plate 1 includes a base plate body 11, with downwardly extending edges 12 around the base plate body 11, caster sleeves 13 at the four corners of the base plate body 11, circumferentially distributed relief ribs 14 around the caster sleeves 13, bottom transverse reinforcing ribs 15 and bottom longitudinal reinforcing ribs 16 on the back of the base plate body 11, arc edges 18 at the four corners of the supporting base plate 1, and concave cross reinforcing ribs 17 on the lower end face of the supporting base plate 1. This can significantly improve the stiffness of the supporting base plate 1.

[0026] A horizontal transverse inner extension reinforcing rib 85 is provided on the inner side of the interlocking frame 8 located on the back plate 4. A longitudinal anti-deformation process pull plate 86 is provided on the inner side of the horizontal transverse inner extension reinforcing rib 85 and the front horizontal plate 7. A triangular rib 87 is provided between the horizontal transverse inner extension reinforcing rib 85 and the inner side of the back plate 4. The setting of the horizontal transverse inner extension reinforcing rib 85, the longitudinal anti-deformation process pull plate 86 and the triangular rib 87 can reduce the amount of thermal deformation of the pressed part during demolding, and ensure the final one-time molding yield of the present invention.

[0027] The fixing structure 9 is an insert-type snap-fit ​​or a side screw fastening structure.

[0028] Example 2: The difference from Example 1 lies in the structure of the inner surfaces of the left side plate 3 and the right side plate 2. In this example, as shown... Figure 7 As shown, a left-hand spiral protrusion 32 and a left transverse reinforcing rib 33 are provided on the inner side of the left side plate 3. A left short horizontal rib 34 and a side vertical rib 35 are provided above or below the left-hand spiral protrusion 32. The left-hand spiral protrusion 32 and the left short horizontal rib 34 are connected to the side vertical rib 35 to form a composite reinforcement. The structure of the inner side of the right side plate 2 is the same as that of the left side plate 3. The left-hand spiral protrusion 32 corresponds to the right-hand spiral protrusion 21; the right transverse reinforcing rib 22 corresponds to the left transverse reinforcing rib 33.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic cabinet formed by integral injection molding, characterized in that: The system includes a support base plate (1) and a snap-fit ​​frame (8). Four uprights (5) are positioned at the four corners between the support base plate (1) and the snap-fit ​​frame (8). The right side plate (2), left side plate (3), and back plate (4) are positioned between the support base plate (1), the snap-fit ​​frame (8), and the uprights (5). The front horizontal plate (7) is fixedly connected to the snap-fit ​​frame (8) and the two front uprights (5). On the inner side of the right side plate (2), there is a right-hand rotating protrusion (21) for installing drawer slides and a right transverse reinforcing rib (22). The inner side of the left side plate (3) is... The structure corresponds to the inner side structure of the right side plate (2). Vertical clearance notches (6) are provided at the four corners of the upper engagement frame (8). The vertical clearance notches (6) extend along the column (5) to the upper surface of the support base plate (1). A fixing structure (9) is provided at the upper end of the engagement frame (8) to facilitate the installation of the top cover. Locking holes (71) are provided on the front horizontal plate (7). The support base plate (1), right side plate (2), left side plate (3), back plate (4), column (5), front horizontal plate (7) and engagement frame (8) are an integrated integral molding structure.

2. The plastic cabinet with integral injection molding as described in claim 1, characterized in that: in The left side plate (3) and / or the right side plate (2) are provided with side holes (31) for avoiding the installation of the sub-platform.

3. The plastic cabinet with integral injection molding as described in claim 1, characterized in that: The vertical clearance notch (6) has a U-shaped cross-section with the opening facing inward.

4. The plastic cabinet with integral injection molding as described in claim 1, characterized in that: The vertical clearance gap (6) has a cross-sectional shape that is either a quadrilateral gap or a circular arc gap, with the gap facing inward.

5. A plastic cabinet with integral injection molding as described in claim 1, characterized in that: The longitudinal section of the bite frame (8) is U-shaped or "I"-shaped. It includes an upper reinforcing edge (81), a vertical edge (82), a lower reinforcing edge (83), and a groove (84). The width of the upper reinforcing edge (81) is less than or equal to the width of the lower reinforcing edge (83). The upper reinforcing edge (81), the vertical edge (82), and the lower reinforcing edge (83) together form the groove (84).

6. A plastic cabinet integrally injection molded according to claim 1, characterized in that: in The inner side of the left plate (3) is provided with a left-handed connecting protrusion (32) and a left transverse reinforcing rib (33). A left short horizontal rib (34) and a side vertical rib (35) are provided above or below the left-handed connecting protrusion (32). The left-handed connecting protrusion (32) and the left short horizontal rib (34) are connected with the side vertical rib (35) to form a composite reinforcing body. The structure of the inner side of the right plate (2) is the same as that of the left plate (3). The left-handed connecting protrusion (32) corresponds to the right-handed connecting protrusion (21); the right transverse reinforcing rib (22) corresponds to the left transverse reinforcing rib (33).

7. A plastic cabinet with integral injection molding as described in claim 1, characterized in that: The supporting base plate (1) includes a base plate body (11), with downwardly extending edges (12) around the base plate body (11), caster sleeves (13) at the center of the four corners of the base plate body (11), circumferentially distributed slow-release ribs (14) around the caster sleeves (13), and bottom transverse reinforcing ribs (15) and bottom longitudinal reinforcing ribs (16) on the back of the base plate body (11).

8. A plastic cabinet with integral injection molding as described in claim 7, characterized in that: The support base plate (1) has rounded edges (18) at its four corners, and a concave cross reinforcing bar (17) is provided on the lower end surface of the support base plate (1).

9. A plastic cabinet formed by integral injection molding according to claim 1, characterized in that: A horizontal transverse inner extension reinforcing rib (85) is provided on the inner side of the bite frame (8) located on the back plate (4). A longitudinal anti-deformation process pull plate (86) is provided on the inner side of the horizontal transverse inner extension reinforcing rib (85) and the front face horizontal plate (7). A triangular rib (87) is provided between the horizontal transverse inner extension reinforcing rib (85) and the inner side of the back plate (4).

10. A plastic cabinet integrally injection molded according to claim 1, characterized in that: The fixing structure (9) is an insert-type buckle or a side screw fastening structure.

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