Hollow molded frame socket structure and manufacturing method and assembled plug rod

Abstract

The present invention relates to a socket structure, and more particularly to a socket structure, a manufacturing method, and an assembly rod for a hollow molded frame of a portable bed used for field medical treatment, camping, disaster relief, and the like. The socket structure comprises an upper cylindrical hole provided on the lower surface of the upper frame surface of the frame; an upper recessed groove is provided on the upper end surface of the upper cylindrical hole; a lower cylindrical hole is provided on the upper surface of the lower frame surface of the frame, and a lower recessed groove is provided on the lower end surface of the lower cylindrical hole; the lower cylindrical hole corresponds to the center of the upper cylindrical hole in upper and lower directions; a support tube, the upper and lower ends of which are fixed in the upper and lower cylindrical holes respectively; an annular edge is provided on the upper end edge of the support tube to fit the upper recessed groove; a tube portion of the support tube is inserted from the upper cylindrical hole into the lower cylindrical hole, and the annular edge is embedded in the upper recessed groove; and a fixing sleeve comprises a tubular portion embedded in the gap between the lower cylindrical hole and the support tube. Compared with the prior art, the present invention solves the problem of overly narrow blow-molded frames being torn by being pulled apart, has a simple structure, is easy to manufacture and install, and provides a more stable assembly rod.

Description

Technical Field

[0001] The invention relates to a socket structure, in particular to a socket structure of a hollow formed frame of a portable bed used for field medical treatment, camping, disaster relief and resettlement, and a manufacturing method and an assembling plug rod. Background Art

[0002] Currently, the box-type beds on the market are manufactured using a hollow molding process. The main components of the bed body and legs are made of engineering plastics and molded, so the production efficiency is high and large quantities can be supplied in a short time. The bed board is in the shape of a box cover, which is folded and matched to form a box body. The box body is equipped with legs, and the mattress, infusion pole, bedside cabinet and other components are modularized. Since this box-type bed does not require additional packaging when folded, it indirectly reduces the handling weight of the bed and facilitates the rapid deployment and use of the bed.

[0003] Although this box-type bed has many advantages as mentioned above, it has long had problems with poor firmness, such as shaking and tilting after being subjected to force when inserting accessories such as infusion poles, safety guardrails, and even mosquito net poles around the bed. This once affected the promotion and use of this bed.

[0004] The main factors affecting the firmness of the plug-in parts can be referred to as Figure 1 and Figure 3 As shown in the figure, this type of box-lid-shaped bed frame has a hollow side frame of a certain height. If the rod insertion holes are directly blow-molded into the bed frame, the depth of the holes will exceed the material's stretch ratio, which will inevitably cause the holes to break and prevent the mold from forming. Even if the bed frame is wide enough, the thickness is not enough. If the rod insertion holes are not deep enough, the rods will still wobble. While meeting the customer's specified product frame dimensions, how to ensure the stability of the inserted rods by designing a reasonable hole structure in this blow-molded frame is a challenge.

[0005] Figure 3 The design shown here attempts to create a recessed area on the frame where the rod is to be inserted, with a pre-embedded nut. A threaded rod is installed at the insertion end of the rod, and the contact surface with the box panel is increased to improve stability. However, in actual use, the rod's stability is still poor and it tends to tilt under load. Later attempts to strengthen the support by adding upper and lower hardware fixings increased the structural complexity and user convenience. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the existing technology and to facilitate the production of a socket structure suitable for blow-molded frame stabilization and plug-in rods through reasonable structural improvements and corresponding manufacturing methods. Of course, its structure is not limited to the frame of a portable bed, nor is it limited to the width of the frame, nor is it limited to the material of the frame, thereby providing good equipment for rescue, camps, etc.

[0007] In order to achieve the above purpose, a socket structure of a hollow molded frame is designed, which is characterized by comprising

[0008] An upper cylindrical hole is provided on the lower surface of the upper frame surface of the frame; an upper sink is provided on the upper end surface of the upper cylindrical hole;

[0009] A lower cylindrical hole is provided on the upper surface of the lower frame of the frame, and a sinking groove is provided on the lower end surface of the lower cylindrical hole; the lower cylindrical hole corresponds to the center of the upper cylindrical hole in the vertical direction;

[0010] The support tube has its upper and lower ends fixed in the upper cylindrical hole and the lower cylindrical hole respectively; the upper edge of the support tube is provided with an annular edge that fits the upper sink groove; the tube portion of the support tube is inserted from the upper cylindrical hole into the lower cylindrical hole, and its annular edge is embedded in the upper sink groove;

[0011] The fixing sleeve comprises a tubular portion, which is embedded in the gap between the lower cylindrical hole and the supporting tube; the fixing sleeve also comprises an outer flange arranged on the bottom edge of the tubular portion, and the outer flange is embedded in the sinking groove.

[0012] Furthermore, the fixing structure between the support tube and the fixing sleeve is connected by bonding; and / or the support tube and the fixing sleeve are tightly embedded; and / or the bottom end of the support tube is located below the outer flange, and the bottom end of the support tube is provided with a stamped flange for supporting the outer flange; and / or arch feet that are symmetrically arched outward are provided on the outer wall of the support tube located below the outer flange.

[0013] Furthermore, the depth of the upper cylindrical hole is ≤ the width from the hole edge of the upper cylindrical hole to the edge of the corresponding side frame; the depth of the lower cylindrical hole is ≤ the width from the hole edge of the lower cylindrical hole to the edge of the corresponding side frame.

[0014] Furthermore, the outer diameter of the support tube at the location where the support tube is fitted with the fixing sleeve is smaller than the outer diameter of the remaining portion of the support tube.

[0015] Furthermore, the inner diameter of the lower cylindrical hole is greater than the inner diameter of the upper cylindrical hole.

[0016] Furthermore, the outer contour of the upper cylindrical hole is generally T-shaped; the outer contour of the lower cylindrical hole is generally in an inverted T-shape.

[0017] Furthermore, the inner diameter of the upper cylindrical hole near the bottom end is smaller than the inner diameter of the rest of the upper cylindrical hole.

[0018] Furthermore, the upper end surface of the fixing sleeve is an inclined surface with a higher inner circle and a lower outer circle.

[0019] Furthermore, the manufacturing method of the jack structure is characterized by adopting the following steps:

[0020] a. When hollow blow molding the frame, the bottom surface of the upper frame and the top surface of the lower frame of the frame where the rod needs to be connected are blow molded to form injection-shaped holes;

[0021] b. Cut off the bottom of the two columnar holes to form upper and lower injection holes that are corresponding to each other;

[0022] c. The support tube is inserted into the upper cylindrical hole and the lower cylindrical hole;

[0023] d. The fixing sleeve is embedded in the support tube and the lower cylindrical hole from bottom to top, and the support tube and the fixing sleeve are fixed.

[0024] Furthermore, the insertion rod assembled with the socket structure includes an insertion rod body, characterized in that:

[0025] An annular retaining ring is provided on the outer wall of the inserting rod body near the lower part;

[0026] The distance between the bottom surface of the annular retaining ring and the inserting rod body is greater than or equal to the height of the supporting tube.

[0027] Compared with the prior art, the present invention solves the problem of an overly narrow frame being torn by stretching, because the upper and lower surfaces of the frame are provided with columnar holes that meet the stretching ratio; at the same time, the support tube and the fixing sleeve are inserted therebetween, so that the upper and lower parts of the plug-in portion of the plug-in rod form a relatively strong plug-in structure supported by the board wall, so as to support various accessories such as infusion rods, guardrails, mosquito net rods, etc.; the present invention solves the long-standing technical problems with a relatively simple structure, is easy to manufacture and install, and the assembled rods are more stable, making it very suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a three-dimensional diagram of a box-type bed installed with a mosquito net, manufactured using a hollow molding process.

[0029] Figure 2 This is a three-dimensional diagram of the box bed when the box is folded in half.

[0030] Figure 3 The utility model relates to a plug-in structure for an existing plug-in rod and a box-type bed frame.

[0031] Figure 4 It is a top view of a box-type bed adopting the plug-in structure of the present invention after being folded in half.

[0032] Figure 5 for Figure 4 An enlarged view of the AA cross-sectional view shown in FIG.

[0033] Figure 6 It is the frame of the injection-shaped hole groove formed during blow molding in Example 2.

[0034] Figure 7It is a cross-sectional view of a frame provided with upper and lower injection-shaped holes in the present invention.

[0035] Figure 8 It is a cross-sectional view of the support tube in the present invention.

[0036] Figure 9 It is a cross-sectional view of the fixing sleeve in the present invention.

[0037] Figure 10 This is a cross-sectional view of the support tube and the fixing sleeve after assembly in the present invention.

[0038] Figure 11 for Figure 10 Bottom view of .

[0039] Figure 12 It is a cross-sectional view of the jack structure in the present invention.

[0040] Figure 13 It is a cross-sectional view of the socket structure with the insertion rod installed in the present invention. DETAILED DESCRIPTION

[0041] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0042] Example 1

[0043] See also Figure 4 、 Figure 5 and Figures 7 to 12 , mainly a hollow molding frame jack structure of engineering plastic blow molding, characterized in that,

[0044] An upper cylindrical hole 2-1 is provided on the lower surface of the upper frame surface 1-1 of the frame; an upper sink 2-11 is provided on the upper end surface of the upper cylindrical hole 2-1;

[0045] A lower cylindrical hole 2-2 is provided on the upper surface of the lower frame 1-2 of the frame, and a sinking groove 2-21 is provided on the lower end surface of the lower cylindrical hole 2-2; the lower cylindrical hole 2-2 corresponds to the center of the upper cylindrical hole 2-1 in the vertical direction;

[0046] The upper and lower ends of the support tube 3 are fixed in the upper cylindrical hole 2-1 and the lower cylindrical hole 2-2 respectively; the upper edge of the support tube 3 is provided with an annular edge 3-1 that fits into the upper sink 2-11; the tube portion of the support tube 3 is inserted from the upper cylindrical hole 2-1 into the lower cylindrical hole 2-2, and the annular edge 3-1 is embedded in the upper sink 2-11;

[0047] The fixing sleeve 4 includes a tubular portion 4-1, which is embedded in the gap between the lower cylindrical hole 2-2 and the support tube 3; the fixing sleeve 4 also includes an outer flange 4-2 provided on the bottom edge of the tubular portion, and the outer flange 4-2 is embedded in the sinking groove 2-21.

[0048] The present invention's design first creates cylindrical holes in the upper and lower frames that meet the material's tensile strength, preventing breakage and ensuring smooth molding. Support tubes 3 are then inserted into these holes, and with the help of a retaining sleeve, a support structure with significant support strength and insertion depth is constructed. To achieve excellent anti-tilt performance, for example, the frame height of a box-type bed should ideally be no less than 50 mm. Of course, it can also be applied to other blow-molded frames that require rod insertion but lack sufficient strength.

[0049] Furthermore, the fixing structure between the support tube 3 and the fixing sleeve 4 is bonded; and / or the support tube 3 and the fixing sleeve 4 are tightly fitted; and / or the bottom end of the support tube 3 is located below the outer flange 4-2, and the bottom end of the support tube 3 is provided with a stamped flange for supporting the outer flange 4-2; and / or the outer wall of the support tube 3 below the outer flange 4-2 is symmetrically provided with arch feet 3-2 that are arched outward. The arch feet 3-2 are provided on at least one symmetrical side of the bottom end of the support tube 3. Figure 11 There are 4 arch feet evenly distributed 3-2 in the middle.

[0050] Furthermore, the depth of the upper cylindrical hole 2-1 is ≤ the width from the hole edge of the upper cylindrical hole to the edge of the corresponding side frame; the depth of the lower cylindrical hole 2-2 is ≤ the width from the hole edge of the lower cylindrical hole to the edge of the corresponding side frame.

[0051] Furthermore, the outer diameter of the support tube 3 where it assembles with the fixing sleeve 4 is smaller than the outer diameter of the rest of the support tube 3. This design not only facilitates the support tube 3 to pass through the lower cylindrical hole 2-2 during assembly, but also facilitates its height positioning when assembled with the fixing sleeve 4. Furthermore, the upper end surface of the fixing sleeve 4 is inclined, with the inner circle higher and the outer circle lower, which facilitates the insertion of the fixing sleeve 4 into the lower cylindrical hole 2-2.

[0052] Furthermore, the inner diameter of the lower cylindrical hole 2 - 2 is larger than the inner diameter of the upper cylindrical hole 2 - 1 , providing sufficient installation space for the fixing sleeve 4 .

[0053] Furthermore, the outer contour of the upper cylindrical hole 2-1 is generally T-shaped; the outer contour of the lower cylindrical hole 2-2 is generally in an inverted T-shape.

[0054] Furthermore, the inner diameter of the upper cylindrical hole 2-1 near the bottom is smaller than the inner diameter of the rest of the upper cylindrical hole 2-1, which facilitates the installation of the support tube 3 while ensuring the stability of the support tube 3 after installation.

[0055] Furthermore, the upper end surface of the fixing sleeve 4 is an inclined surface with a higher inner circle and a lower outer circle, which facilitates the fixing sleeve 4 to pass into the lower cylindrical hole 2-2.

[0056] Furthermore, the materials used for the support tube 3 and the fixing sleeve 4 include metal and plastic.

[0057] Although the present invention is mainly directed to a blow-molded narrow-frame jack structure, it is also applicable to jack structures made of other materials.

[0058] Example 2

[0059] The manufacturing method of the jack structure is characterized by adopting the following steps:

[0060] a. When hollow blow molding the frame, the bottom surface of the upper frame and the top surface of the lower frame of the frame where the rod needs to be connected are blow molded to form injection-shaped holes 2, see Figure 6 ;

[0061] b. Cutting off the bottoms of the two columnar holes 2 to form upper injection-shaped holes 2-1 and lower injection-shaped holes 2-2 that are connected to each other;

[0062] c. The support tube 3 is inserted into the upper cylindrical hole 2-1 and the lower cylindrical hole 2-2;

[0063] d. The fixing sleeve 4 is embedded in the support tube 3 and the lower cylindrical hole 2-2 from bottom to top, and the support tube 3 and the fixing sleeve 4 are fixed.

[0064] Example 3

[0065] The plug rod assembled with the socket structure includes a plug rod body, characterized in that an annular retaining ring 5-1 is provided on the outer wall near the lower part of the plug rod body 5; the distance from the bottom surface of the annular retaining ring 5-1 to the plug rod body 5 is greater than or equal to the height of the support tube 3, so that the plug rod body 5 is easily inserted into place, see Figure 13 In this example, the insertion rods include various rods such as infusion rods, guardrail rods, mosquito net rods, etc.

Claims

1. A socket structure of a hollow molded frame, characterized in that: An upper columnar hole (2-1) is provided on the lower surface of the upper frame surface (1-1) of the frame; an upper sink groove (2-11) is provided on the upper end surface of the upper columnar hole (2-1); A lower cylindrical hole (2-2) is provided on the upper surface of the lower frame (1-2) of the frame, and a sinking groove (2-21) is provided on the lower end surface of the lower cylindrical hole (2-2); the lower cylindrical hole (2-2) corresponds to the center of the upper cylindrical hole (2-1) in the upper and lower directions; The support tube (3) has its upper and lower ends fixed in the upper cylindrical hole (2-1) and the lower cylindrical hole (2-2) respectively; the upper edge of the support tube (3) is provided with an annular edge (3-1) that fits in the upper sink groove (2-11); the tube portion of the support tube (3) is inserted from the upper cylindrical hole (2-1) into the lower cylindrical hole (2-2), and its annular edge (3-1) is embedded in the upper sink groove (2-11); The fixing sleeve (4) comprises a tubular portion (4-1), wherein the tubular portion (4-1) is embedded in the gap between the lower columnar hole (2-2) and the support tube (3); the fixing sleeve (4) further comprises an outer flange (4-2) provided at the bottom edge of the tubular portion, wherein the outer flange (4-2) is embedded in the sinking groove (2-21); the fixing structure between the support tube (3) and the fixing sleeve (4) adopts one or more of bonding connection and tight embedding; the bottom end of the support tube (3) is located below the outer flange (4-2), and the bottom end of the support tube (3) is provided with a stamped flange for supporting the outer flange (4-2); and the outer wall of the support tube (3) located below the outer flange (4-2) is symmetrically provided with arch feet (3-2) that are inclined outward.

2. The jack structure of a hollow molded frame according to claim 1, characterized in that: The depth of the upper cylindrical hole (2-1) is less than or equal to the width from the hole edge of the upper cylindrical hole to the edge of the corresponding side frame; The depth of the lower cylindrical hole (2-2) is less than or equal to the width from the hole edge of the lower cylindrical hole to the edge of the corresponding side frame.

3. The jack structure of a hollow molded frame according to claim 1, characterized in that: The outer diameter of the support tube (3) at the assembly point with the fixing sleeve (4) is smaller than the outer diameter of the rest of the tube portion of the support tube (3).

4. The jack structure of a hollow molded frame according to claim 1, characterized in that: The inner diameter of the lower cylindrical hole (2-2) is greater than the inner diameter of the upper cylindrical hole (2-1).

5. The jack structure of a hollow molded frame according to claim 1, characterized in that: The outer contour of the upper cylindrical hole (2-1) is generally T-shaped; the outer contour of the lower cylindrical hole (2-2) is generally in an inverted T-shape.

6. The jack structure of a hollow molded frame according to claim 1, characterized in that: The inner diameter of the upper cylindrical hole (2-1) near the bottom end is smaller than the inner diameter of the rest of the upper cylindrical hole (2-1).

7. The jack structure of a hollow molded frame according to claim 1, characterized in that: The upper end surface of the fixed sleeve (4) is an inclined surface with a higher inner circle and a lower outer circle.

8. A method for manufacturing the jack structure according to any one of claims 1 to 7, characterized in that: Use the following steps: a. When hollow blow molding the frame, blow molding is performed on the bottom surface of the upper frame and the top surface of the lower frame of the frame where the rod needs to be connected to form injection-shaped holes (2); b. Cutting off the bottoms of the two columnar hole grooves (2) to form an upper injection-shaped hole (2-1) and a lower injection-shaped hole (2-2) that are connected in the upper and lower directions; c. The support tube (3) is inserted into the upper cylindrical hole (2-1) and the lower cylindrical hole (2-2); d. The fixing sleeve (4) is embedded in the support tube (3) and the lower cylindrical hole (2-2) from bottom to top; The supporting tube (3) and the fixing sleeve (4) are fixed.

9. A plug rod assembled with the socket structure according to any one of claims 1 to 7, comprising a plug rod body, characterized in that: An annular retaining ring (5-1) is provided on the outer wall near the lower portion of the inserting rod body (5); The distance between the bottom surface of the annular retaining ring (5-1) and the inserting rod body (5) is greater than or equal to the height of the supporting tube (3).

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