Detachable inner frame structure for supporting steel sheet

Abstract

The utility model discloses a detachable inner frame structure for supporting a steel sheet. The detachable inner frame structure comprises the detachable steel sheet and a supporting frame, the supporting frame comprises a plurality of supporting frames detachably connected with the periphery of the detachable steel sheet, the detachable steel sheet comprises clamping parts located on the peripheral edge of the detachable steel sheet, and clamping grooves allowing the clamping parts to be inserted from the side edges of the clamping parts in a sliding mode are formed in the sides, close to the supporting frame, of the supporting frames. According to the utility model, the structure is simple and convenient, the supporting frame can be conveniently detached and reused so as to reduce the production cost, the detachable steel sheet is light and thin in size so as to reduce the storage space, and the supporting frame matched with the detachable steel sheet can be detached so as to realize rapid switching production of the steel sheet and improve the production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of steel screen printing, in particular to a detachable inner frame structure for supporting a steel sheet. Background Art

[0002] SMT (Surface Mount Technology), also known as surface mounting or surface mounting technology, is the most popular technology and process in the current electronic assembly industry. It is a circuit assembly technology that mounts pinless or short-lead surface mounting components on the surface of a printed circuit board or other substrate, and assembles them by soldering through methods such as reflow soldering or dip soldering.

[0003] The core of SMT processing is to use a steel mesh with preset mesh holes for solder paste printing. The steel mesh structure includes a steel sheet and a mesh frame composed of frames surrounding the steel sheet. In the manufacturing and use of existing SMT templates, the gluing method is usually used. This method is specifically: the SMT template steel sheet, generally a metal sheet, especially a steel sheet is placed on the mesh frame, and the steel sheet is fixed to the mesh frame with an adhesive, and a force away from the center of the mesh frame is applied to the frame of the mesh frame, so that tension is formed on the surface of the steel sheet. However, due to the problem of glue curing, the tension of the steel sheet in the SMT template will be further reduced during use and scrapped, which causes a certain waste of resources. Moreover, since the glue-fixed mesh frame cannot be reused, each steel sheet needs to be equipped with a corresponding mesh frame, which also leads to an increase in the production cost of the enterprise.

[0004] Therefore, it is necessary to provide a detachable inner frame structure for supporting steel sheets to solve the above problems. Utility Model Content

[0005] In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide a detachable inner frame structure for supporting steel sheets. The structure is simple and convenient for detachable and reusable supporting frame to reduce production costs. The detachable steel sheets are light and thin in size to reduce storage space, and the matching support frame is detachable to realize rapid switching of steel sheet production and improve production efficiency.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is: a detachable inner frame structure for supporting a steel sheet, comprising a detachable steel sheet and a supporting frame; the supporting frame comprises a plurality of supporting side frames detachably connected to the detachable steel sheet on all sides, the detachable steel sheet comprises a clamping portion located on its four edges, and a clamping groove is provided on one side of the supporting side frame close to the supporting frame for the clamping portion to slide and insert from its side.

[0007] Furthermore, the snap-fitting portion includes a bent portion bent toward the bottom of the removable steel sheet, and an acute angle is formed between the straight line in the length direction of the bent portion and the lower surface of the removable steel sheet, and the snap-fitting groove includes a snap-fitting surface, a contact surface and an inclined surface, and the snap-fitting surface is inclined upward in the direction away from the removable steel sheet. When the snap-fitting portion is connected to the snap-fitting groove, the contact surface abuts against the upper surface of the removable steel sheet, and the inclined surface abuts against the bent portion.

[0008] Furthermore, the length of the buckle surface matches the length of the bending portion, so that the connection between the snap groove and the snap-fit ​​portion is more stable.

[0009] Furthermore, the clamping part is a clamping piece, and the clamping piece is a cylindrical clamping strip, and the clamping strip is spot-welded to the lower surface of the edge of the detachable steel sheet, and the clamping groove is provided with a downwardly concave limiting surface, and the limiting surface is arranged in an arc shape, and the height of the opening on the clamping groove is less than the diameter of the clamping strip. The limiting surface has a limiting effect on the clamping strip on the detachable steel sheet that slides into the inside of the clamping groove from the side edge, and the downwardly concave limiting surface can well ensure that when the supporting frame is pulled horizontally, the clamping part is separated from the clamping groove, and when the supporting frame is pulled to move in a direction away from the detachable steel sheet, the clamping part and the clamping groove can be fully engaged, and ensure that the detachable steel sheet will not be separated from the supporting frame, and can obtain sufficient tension on its surface for subsequent solder paste printing.

[0010] Furthermore, the multiple supporting frames are connected head to tail through a connecting assembly. The connecting assembly is provided to detachably connect the four supporting frames head to tail, thereby ensuring that the detachable steel sheet is positioned inside the supporting frame, which is convenient for subsequent handling and solder paste printing.

[0011] Furthermore, the connection assembly includes a moving block and a connecting angle piece covered thereon, one end of the moving block extends into the connecting groove at the bottom of the supporting frame, and the other end is located in the receiving groove provided at the bottom of the connecting angle piece, the moving block is connected to the connecting angle piece by bolts, and the connecting angle piece is provided with a steel sheet yielding groove for the corner of the detachable steel sheet to be placed in. The connecting angle piece and the part of the moving block located in the connecting angle piece are provided with a plurality of bolt holes, and the bolts penetrate through two bolt holes correspondingly provided above and below so that the connecting angle piece and the moving block can be detachably connected, which is convenient for assembling the supporting frame and the detachable steel sheet; the moving block is provided with a guide block matching the connecting groove, and the bottom of the connecting groove is provided with a limiting block supporting the moving block, which can effectively prevent the moving block from falling off from the connecting groove, thereby ensuring the assembly effect of the supporting frame and the detachable steel sheet.

[0012] Furthermore, the engaging groove is extended toward the center line of the width direction of the supporting frame, so that the engaging groove has a sufficient depth in the direction parallel to the width of the supporting frame to meet the insertion requirements of the engaging portion on the detachable steel sheet, and the engaging of the detachable steel sheet is more stable.

[0013] Furthermore, the snap-fitting groove is opened toward one side of the detachable steel sheet, so as to provide a moving space for the detachable steel sheet to be inserted into the snap-fitting groove from one end of the supporting frame in the length direction and move along the length direction of the supporting frame, thereby avoiding interference during the movement of the detachable steel sheet, which may result in the snap-fitting portion on the detachable steel sheet being unable to be fully inserted into the snap-fitting groove.

[0014] Beneficial effects of the utility model:

[0015] In the utility model, the detachable steel sheet and the supporting frame cooperate with each other, the clamping part on the detachable steel sheet is detachably connected to the clamping groove, the structure is simple, and the supporting frame can be detachably reused to reduce production costs. The detachable steel sheet is light and thin in size to reduce storage space, and the detachable supporting frame matched therewith can realize rapid switching of steel sheet production and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an isometric view of the overall structure of an embodiment of the utility model;

[0017] Figure 2 It is a partial structural cross-sectional schematic diagram of an embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the connection between the clamping groove and the clamping portion of an embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of another connection between a snap-fitting groove and a snap-fitting portion according to an embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the connection between another engaging groove and the engaging portion of an embodiment of the utility model;

[0021] Figure 6 This is a schematic diagram of the structure of a connection assembly according to an embodiment of the utility model;

[0022] In the figure: 1. detachable steel sheet; 11. snap-fitting part; 111. bending part; 112. snap-fitting part; 2. supporting frame; 21. supporting frame; 211. snap-fitting groove; 2111. snap-fitting surface; 2112. limiting surface; 2113. contact surface; 2114. inclined surface; 212. connecting groove; 213. limiting block; 3. connecting assembly; 31. connecting angle piece; 32. bolt hole; 33. steel sheet making way groove; 34. accommodating groove; 35. moving block; 36. guide block. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0024] See attached Figures 1 to 6 As shown, a detachable inner frame structure for supporting a steel sheet in this embodiment comprises a detachable steel sheet 1 and a support frame 2; the support frame 2 comprises a plurality of support frames 21 detachably connected to the detachable steel sheet 1 on four sides, and the four support frames 21 are detachably connected to the corresponding detachable steel sheet 1 on four sides, so that after tension is formed on the surface of the detachable steel sheet 1 and printing is successful, the next detachable steel sheet 1 that needs solder paste printing can be quickly disassembled and replaced, which effectively improves the printing efficiency of the detachable steel sheet 1. At the same time, the support frames 21 will not be damaged during disassembly, thereby realizing the reusability of the support frames 21 and effectively reducing the production cost of the enterprise;

[0025] The removable steel sheet 1 includes a snap-in portion 11 located at the edges thereof, and a snap-in slot 211 is provided on one side of the support frame 21 close to the support frame 2 for the snap-in portion 11 to slide into from the side thereof. The snap-in portion 11 and the snap-in slot 211 are slidably connected along the length direction of the support frame 21, and are in a snap-in state along the width direction of the support frame 21, so that when the support frame 21 is pulled to move in a direction away from the removable steel sheet 1, the snap-in portion 11 and the snap-in slot 211 can be fully snap-in, and ensure that the removable steel sheet 1 will not be separated from the support frame, and that its surface can obtain sufficient tension for subsequent solder paste printing.

[0026] The clamping portion 11 includes a bending portion 111 bent toward the bottom of the detachable steel sheet 1, and an acute angle is formed between the straight line in the length direction of the bending portion 111 and the lower surface of the detachable steel sheet 1. The clamping groove 211 includes a clamping surface 2111, a contact surface 2113 and an inclined surface 2114. The clamping surface 2111 is inclined upward in a direction away from the detachable steel sheet 1. When the clamping portion 11 is connected to the clamping groove 211, the contact surface 2113 abuts against the upper surface of the detachable steel sheet 1, and the inclined surface 2114 abuts against the bending portion 111.

[0027] A locking structure is formed between the buckle surface 2111 on the locking groove 211 and the bent portion 111 on the locking portion 11, and the bent portion 111 on the detachable steel sheet 1 moves from one end of the locking groove 211 along the length direction of the locking groove 211 until the bent portion 111 is completely located in the locking groove 211. At this time, the supporting frame 21 is pulled to move in a direction away from the detachable steel sheet 1, and the locking portion 11 and the locking groove 211 can be fully engaged, ensuring that the detachable steel sheet 1 will not detach from the supporting frame and that its surface can obtain sufficient tension for subsequent solder paste printing.

[0028] The length of the buckle surface 2111 matches the length of the bent portion, so that the connection between the locking groove 211 and the locking portion 11 is more stable.

[0029] The clamping portion 11 is a clamping piece 112, and the clamping piece 112 is a cylindrical clamping strip, which is spot welded to the lower surface of the edge of the detachable steel sheet 1. The clamping groove 211 is provided with a downwardly concave limiting surface 2112, and the limiting surface 2112 is arranged in an arc shape. The height of the opening on the clamping groove 211 is smaller than the diameter of the clamping strip.

[0030] The limiting surface 2112 has a limiting effect on the clamping strip on the detachable steel sheet 1 that slides from the side of the clamping groove 211 into the interior thereof. The downwardly recessed limiting surface 2112 can well ensure that when the supporting frame 21 is pulled horizontally, the clamping portion 11 disengages from the clamping groove 211. When the supporting frame 21 is pulled in a direction away from the detachable steel sheet 1, the clamping portion 11 can be fully engaged with the clamping groove 211, ensuring that the detachable steel sheet 1 will not be separated from the supporting frame and that its surface can obtain sufficient tension for subsequent solder paste printing.

[0031] It should be noted that, in some embodiments, the snap-in strip is not limited to being cylindrical, but can also be semicircular, arc-shaped or square, as long as it can move smoothly in the snap-in groove 211. The cylindrical shape selected in the present application can better enable it to move smoothly in the snap-in groove 211 with an arc-shaped limiting surface 2112, and it is more convenient for the staff to disassemble the detachable steel sheet 1 and the support frame 2.

[0032] The multiple support frames 21 are connected head to tail through the connection assembly 3. The connection assembly 3 is provided to detachably connect the four support frames 21 head to tail, thereby ensuring that the detachable steel sheet 1 is positioned inside the support frame 2, which is convenient for subsequent handling and solder paste printing.

[0033] In some embodiments, the length of the clamping portion 11 is smaller than the length of the corresponding side, and is symmetrically arranged along the center line of the detachable steel sheet 1. The outer edges of the four corners consisting of the portion of the detachable steel sheet 1 that exceeds the clamping portion 11 and the adjacent exceeding portions are covered by connecting corner pieces 31, which can ensure that the detachable steel sheet 1 is safer during the connection and transportation process.

[0034] The snap-fitting groove 211 is opened along the length direction of the supporting frame 21, and the length of the snap-fitting groove 211 is the same as the length of the snap-fitting portion 11, which further ensures the snap-fitting effect between the detachable steel sheet 1 and the supporting frame 21 while also reducing the production materials of the supporting frame 21, thereby reducing the production cost.

[0035] The connecting assembly 3 includes a moving block 35 and a connecting angle piece 31 covered thereon, one end of the moving block 35 extends into the connecting groove 212 at the bottom of the supporting frame 21, and the other end is located in the accommodating groove 34 opened at the bottom of the connecting angle piece 31, the moving block 35 is connected to the connecting angle piece 31 by bolts, and the connecting angle piece 31 is provided with a steel sheet making way groove 33 for the corners of the detachable steel sheet 1 to be placed.

[0036] The connecting angle piece 31 and the movable block 35 are provided with a plurality of bolt holes 32 in the portion located inside the connecting angle piece 31, and the bolts penetrate through two corresponding bolt holes 32 above and below so that the connecting angle piece 31 and the movable block 35 can be detachably connected, which is convenient for assembling the supporting frame 21 and the detachable steel sheet 1; the movable block 35 is provided with a guide block 36 matching the connecting groove 212, and the bottom of the connecting groove 212 is provided with a limiting block 213 supporting the movable block 35, which can effectively prevent the movable block 35 from falling off from the connecting groove 212, thereby ensuring the assembly effect of the support frame 2 and the detachable steel sheet 1.

[0037] The engaging groove 211 extends toward the center line of the width direction of the supporting frame 21. The engaging groove 211 has a sufficient depth in a direction parallel to the width of the supporting frame 21 to meet the insertion requirements of the engaging portion 11 on the detachable steel sheet 1, and the engaging of the detachable steel sheet 1 is more stable.

[0038] The snap-fitting groove 211 is opened toward one side of the detachable steel sheet 1. A moving space is provided for the detachable steel sheet 1 to be inserted into the snap-fitting groove 211 from one end of the supporting frame 21 in the length direction and to move along the length direction of the supporting frame, thereby avoiding interference during the movement of the detachable steel sheet 1, which may result in the inability of the snap-fitting portion 11 on the detachable steel sheet 1 to be fully inserted into the snap-fitting groove 211.

[0039] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A detachable inner frame structure for supporting a steel sheet, characterized in that: It includes a detachable steel sheet and a support frame; the support frame includes a plurality of supporting frame frames detachably connected to the detachable steel sheet on all sides; the detachable steel sheet includes a snap-in portion located on its four edges; a snap-in groove for the snap-in portion to slide and insert from its side is provided on one side of the supporting frame close to the support frame; the snap-in portion includes a bent portion bent toward the bottom of the detachable steel sheet; an acute angle is formed between a straight line in the length direction of the bent portion and a lower surface of the detachable steel sheet; the snap-in groove includes a snap-in surface, a contact surface and an inclined surface; the snap-in surface is inclined upward in a direction away from the detachable steel sheet; when the snap-in portion is connected to the snap-in groove, the contact surface abuts against the upper surface of the detachable steel sheet, and the inclined surface abuts against the bent portion.

2. A detachable inner frame structure for supporting a steel sheet according to claim 1, characterized in that: The length of the buckle surface matches the length of the bent portion.

3. The detachable inner frame structure for supporting a steel sheet according to claim 1, characterized in that: The clamping part is a clamping piece, and the clamping piece is a cylindrical clamping strip. The clamping strip is spot welded to the lower surface of the edge of the detachable steel sheet. A downwardly concave limiting surface is provided on the clamping groove, and the limiting surface is arranged in an arc shape. The height of the opening on the clamping groove is smaller than the diameter of the clamping strip.

4. The detachable inner frame structure for supporting a steel sheet according to claim 1, characterized in that: The multiple supporting frames are connected head to tail through a connecting component.

5. A detachable inner frame structure for supporting a steel sheet according to claim 4, characterized in that: The connecting assembly includes a moving block and a connecting angle piece covered thereon, one end of the moving block extends into a connecting groove at the bottom of the supporting frame, and the other end is located in a receiving groove opened at the bottom of the connecting angle piece, the moving block is connected to the connecting angle piece by bolts, and the connecting angle piece is provided with a steel sheet yielding groove for the corners of the detachable steel sheet to be placed in.

6. A detachable inner frame structure for supporting a steel sheet according to claim 1, characterized in that: The engaging groove is extended toward the center line of the width direction of the supporting frame.

7. The detachable inner frame structure for supporting a steel sheet according to claim 1, characterized in that: The engaging groove is opened toward one side of the detachable steel sheet.

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