Screen frame structure

Abstract

The embodiment of the utility model provides a screen frame structure. The screen frame structure comprises a frame, a swing rod and an elastic assembly. The key points of the utility model are as follows: two opposite first inner side walls of the inner cavity of the frame body of the frame are respectively provided with a first clamping groove; the upper end of the swing rod is in running fit with the pivoting hole, the lower end of the swing rod is located in the inner cavity and is provided with a second outer side wall corresponding to the first inner side wall, and a second clamping groove corresponding to the first clamping groove is formed in the second outer side wall; the elastic assembly comprises two mounting blocks, an elastic body and an elastic piece, one mounting block is matched with one second clamping groove, the other mounting block is matched with one first clamping groove corresponding to the second clamping groove, and the elastic body is matched in the other first clamping groove and abuts against the lower end of the elastic piece and the inner side wall of the other first clamping groove; the two ends of the elastic piece abut against the two installation blocks respectively. Through the structural design, the positioning precision of the elastic piece is improved, the service life of the elastic piece is prolonged, the structural strength of the screen frame is improved, and installation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing screen, in particular to a screen frame structure. BACKGROUND

[0002] SMT processing adopts steel screen for solder paste printing. When the printing machine performs solder paste printing, the printing machine tensions the steel screen through the screen frame to ensure the processing quality. The existing screen frame includes a frame body and a movable rod. The frame body has an installation space formed therein. The movable rod is rotatably connected to the top of the frame body in the up-down direction. The upper end of the movable rod extends out of the frame body and is connected to the steel screen. The lower end of the movable rod is located in the installation space and has an elastic structure on each side thereof. The elastic structures abut against the frame body and the movable rod to drive the movable rod to rotate, so that the movable rod drives the steel screen to move to loosen or tension the steel screen. However, the above structure is easy to be damaged and has a short service life. SUMMARY

[0003] In view of the deficiencies of the prior art, the embodiments of the present application provide a screen frame structure which improves the positioning accuracy of the spring by setting two installation blocks matched with the first and second clamping grooves respectively and an elastic member abutting against the two installation blocks, thereby improving the structural stability and service life.

[0004] The screen frame structure comprises a frame, a swing rod connected to the frame, and an elastic assembly.

[0005] The frame comprises a frame body. The top surface of the inner cavity of the frame body is downwardly provided with an opening communicating with the inner cavity. The opening is formed with a pivot hole. The opposite first inner side walls of the inner cavity are respectively formed with a first clamping groove.

[0006] The upper end of the swing rod is rotatably matched with the pivot hole and extends out of the inner cavity from the opening. The lower end of the swing rod is located in the inner cavity and has a second outer side wall corresponding to the first inner side wall. The second outer side wall is formed with a second clamping groove corresponding to the first clamping groove.

[0007] The elastic assembly comprises two installation blocks, an elastic body, and an elastic member. One of the installation blocks is matched with the second clamping groove. The other installation block is matched with the first clamping groove corresponding to the second clamping groove. The elastic body is matched in the other first clamping groove and abuts against the lower end of the elastic member and the inner side wall of the other first clamping groove. The two ends of the elastic member abut against the two installation blocks respectively.

[0008] Further, the two first inner side walls are integrally protruded inwardly to form a positioning block respectively. The two positioning blocks and the bottom wall of the inner cavity form the two first clamping grooves. The second outer side wall is integrally protruded to form a limiting block corresponding to the positioning block. The limiting block, the second outer side wall, and the bottom wall of the inner cavity form the second clamping groove.

[0009] Further, the first and second clamping grooves and the two mounting blocks extend along the length direction of the frame body, the two mounting blocks are respectively in gap cooperation with the first and second clamping grooves, and the two inner side walls of the two mounting blocks close to each other are respectively provided with at least one mounting hole, and the two ends of the elastic member are respectively in gap cooperation with the two mounting holes and respectively abut against the inner walls of the two mounting holes.

[0010] Further, each of the mounting blocks is provided with a plurality of mounting holes which are uniformly distributed along the length direction of the frame body, the mounting holes are blind holes, and one mounting hole of each of the mounting blocks corresponds to one mounting hole of another mounting block, and the elastic member has a plurality of elastic members, and the two ends of one elastic member are respectively in gap cooperation with the corresponding two mounting holes.

[0011] Further, the two first inner side walls are respectively outwardly recessed to form a first recess, one first recess forms one first clamping groove, and the second outer side wall is recessed to form a second recess corresponding to the first recess, and the second recess forms the second clamping groove.

[0012] Further, the two first inner side walls are respectively integrally outwardly protruded to form a positioning block, the two positioning blocks and the bottom wall of the inner cavity form the two first clamping grooves, the lower end of the swing rod has a third outer side wall opposite to the second outer side wall, the third outer side wall is integrally outwardly protruded to form a stop block above the positioning block, and the stop block can abut against the positioning block when the swing rod swings downward.

[0013] Further, the elastic member is a spring, and the elastic body is an air bag.

[0014] Further, the inner cavity penetrates through the two end faces of the frame body, the frame body is a profiled material, the top face of the profiled material is downwardly recessed to form a mounting groove, the opening is downwardly formed from the top face of the mounting groove, the profiled material has a plurality of profiled materials, the plurality of profiled materials are connected in a head-to-tail manner through a connecting corner piece, and the upper end of the swing rod forms a hook portion for connecting a steel mesh and located in the mounting groove.

[0015] Further, the outer side wall of the frame body is integrally extended outwardly to form a reinforcing portion, the reinforcing portion is hollow, and a partition plate is arranged in the middle portion of the accommodating cavity, the two ends of the partition plate are respectively connected with the opposite two inner side walls of the accommodating cavity, so that the partition plate divides the accommodating cavity into two independent chambers which are arranged in an up-down manner.

[0016] The net frame structure provided by the embodiment of the present application improves the positioning accuracy of the elastic member by setting two installation blocks matched with the first and second clamping slots respectively and the elastic member abutting against the two installation blocks, on the one hand, the stress direction of the elastic member tends to be the axial direction of the elastic member, which can improve the service life of the spring, on the other hand, the swing rod structure strength can be improved, and the tension and stability of the steel net are further improved, in addition, when the elastic member is installed, the elastic member can be pre-installed, then the installation block is clamped to install the elastic member and the installation block in the inner cavity of the frame body, so that the elastic member is installed conveniently.

[0017] Other features and advantages of the present application will be described in the following description, or can be inferred from the description, or can be determined without doubt, or can be known by implementing the above-mentioned technology disclosed in the present application.

[0018] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application, it should be understood that the following drawings only show some embodiments of the present application, therefore, should not be regarded as a limitation to the scope, for those skilled in the art, without paying creative labor, other related drawings can also be obtained according to these drawings.

[0020] Figure 1 It is a partial perspective exploded view of the net frame structure of the embodiment of the present application;

[0021] Figure 2 It is a partial perspective exploded view of the net frame structure of the embodiment of the present application; Figure 1 It is a A-A direction sectional view of the net frame structure of the embodiment of the present application;

[0022] Figure 3 It is a A-A direction sectional view of the net frame structure of the embodiment of the present application; Figure 2 It is a front view and side view of the installation block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described in combination with the drawings in the embodiments of the present application.

[0024] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance.

[0025] As Figures 1 to 3 shown in the drawings, the embodiment of the present application provides a screen frame structure, which is applied to an SMT printer and used for tensioning a steel screen 5, the steel screen 5 is used for tin paste printing, and the screen frame structure comprises a frame 1, a swing rod 2 connected to the frame 1 and an elastic assembly 3 connected to the frame 1.

[0026] The frame 1 comprises a frame body 11, a top surface of an inner cavity 111 of the frame body 11 is downwardly provided with an opening 1111 which is communicated to the inner cavity 111, the opening 1111 is formed with a pivot hole 1112, the inner cavity 111 penetrates through two end surfaces of the frame body 11 to form a port 14 at each of the two end surfaces of the frame body 11, the frame body 11 is a profile material in a strip shape and a mounting groove 12 is formed in the top surface of the frame body 11, the mounting groove 12 forms an accommodation space; the opening 1111 is downwardly provided from the top surface of the mounting groove 12, there are a plurality of profile materials, the plurality of profile materials are connected end to end through a connecting corner piece 4 to be assembled into the frame 1 in a rectangular shape, specifically, each of two adjacent ports 14 is matched with a connecting corner piece 4 to realize the connection of the two adjacent profile materials; a first clamping groove 1114 is further formed at the middle part of each of the two first inner side walls 1113 of the inner cavity 111, specifically, the two first inner side walls 1113 are respectively integrally protruded inwardly to form a positioning block 1115, and the two positioning blocks 1115 form the two first clamping grooves 1114 together with the bottom wall of the inner cavity.

[0027] Optionally, an outer side wall of the frame body 11 is integrally extended outwardly to form a reinforcing part 13, the reinforcing part 13 is hollow and a partition plate 131 is arranged at the middle part of the accommodation cavity of the reinforcing part 13, the partition plate 131 is integrally formed with the profile material, and the two ends of the partition plate 131 are respectively connected with the two inner side walls of the accommodation cavity, so that the partition plate 131 divides the accommodation cavity into two independent chambers 132 which are distributed in an up-down manner, the independent chambers 132 are in a closed loop structure, and the strength of the frame body 11 can be improved to prevent deformation by arranging the reinforcing part 13.

[0028] The upper end of the swing rod 2 is rotationally matched with the pivot hole 1112 and extends out of the inner cavity 111 from the opening 1111, the upper end of the swing rod 2 forms a hook part 24 which is used for connecting the steel screen 5 and is located in the mounting groove 12, the lower end of the swing rod 2 is located in the inner cavity 111 and has a second outer side wall 21 which corresponds to the first inner side wall 1113, the second outer side wall 21 forms a second clamping groove 22 corresponding to the first clamping groove 1114, specifically, the middle part of the second outer side wall 21 integrally protrudes to form a limiting block 221 corresponding to the positioning block 1115, and the limiting block 221 forms the second clamping groove 22 together with the second outer side wall 21 and the bottom wall of the inner cavity 111. Of course, in other embodiments, the following structure can also be adopted: the two first inner side walls 1113 are respectively recessed outwardly to form a first recess (not shown), the first recess forms a first clamping groove 1114, and the second outer side wall 21 is recessed to form a second recess (not shown) corresponding to the first recess, the second recess forms a second clamping groove 22, and the specific structure can be selected according to actual needs.

[0029] The elastic assembly 3 comprises two mounting blocks 31, an elastic body 32 and elastic members 33. One mounting block 31 is matched with the second clamping groove 22, and the other mounting block 31 is matched with a first clamping groove 1114 corresponding to the second clamping groove 22. The elastic body 32 is matched in the other first clamping groove 1114 and abuts against the lower end of the elastic member 33 and the inner side wall of the other first clamping groove 1114. The two ends of the elastic member 33 respectively abut against the two mounting blocks 31, that is, the elastic member 33 is abutted between the two mounting blocks 31, so as to improve the positioning accuracy of the elastic member 33. On the one hand, the stress direction of the elastic member 33 tends to be the axial direction of the elastic member 33, so as to improve the service life of the spring. On the other hand, the two mounting blocks 31 and the hook portion 24 of the swing rod 2 jointly bear stress, which is equivalent to increasing the thickness of the material in the stress direction of the hook portion 24, that is, the strength of the hook portion 24 is enhanced, so that the hook portion 24 can bear greater force without deformation, further improving the structural strength of the swing rod 2, and achieving the purpose of improving the tension and stability of the steel mesh 5. In addition, by arranging the two mounting blocks 31, when the elastic member 33 is installed, the elastic member 33 can be pre-assembled, and then the mounting blocks 31 are clamped to assemble the elastic member 33 and the mounting blocks 31 into the inner cavity 111 of the frame body 11, so that the spring is convenient to install.

[0030] The first clamping groove 1114, the second clamping groove 22 and the two mounting blocks 31 extend along the length direction of the frame body 11. The two mounting blocks 31 are gap matched with the first clamping groove 1114 and the second clamping groove 22 respectively. In order to further improve the positioning accuracy, at least one mounting hole 311 is arranged in the inner side wall of each mounting block 31 close to each other. The two ends of the elastic member 33 are respectively matched with the two mounting holes 311 to realize the positioning of the elastic member 33 and respectively abut against the inner walls of the two mounting holes 311. In the embodiment, a plurality of mounting holes 311 are arranged in the middle of the inner side wall of each mounting block 31 and uniformly distributed along the length direction of the frame body 11. The mounting hole 311 is a blind hole. Specifically, there are seven mounting holes 311 in each mounting block 31, and one mounting hole 311 in one mounting block 31 corresponds to one mounting hole 311 in the other mounting block 31. There are seven elastic members 33, and the two ends of one elastic member 33 are respectively gap matched with the corresponding two mounting holes 311 and respectively abut against the inner walls of the two mounting holes 311. By arranging a plurality of elastic members 33, sufficient tension can be provided to the swing rod 2, so as to ensure that the swing rod 2 can tension the steel mesh 5, and further improve the tension and stability of the steel mesh 5.

[0031] More specifically, the lower end of the swing lever 2 has a third outer side wall 23 opposite the second outer side wall 21, the third outer side wall 23 integrally projects outward to form a stop block 231 above the positioning block 1115, the elastic member 33 is a spring, and the elastic body 32 is an air bag connected with an air pipe to realize inflation and deflation of the air bag. When the swing lever 2 swings downward, the stop block 231 can abut against the positioning block 1115 to limit downward movement of the swing lever 2, and the maximum opening angle of the hook portion 24 can be limited when the air bag is inflated, so as to prevent the air bag from being squeezed due to excessive inflation when the air pressure is too high, so as to prevent the swing lever 2 from being excessively squeezed by the spring, so as to cause the spring to lose elasticity due to plastic deformation, and further affect the tension of the steel mesh 5.

[0032] When the steel mesh 5 is clamped, the lower end of the swing lever 2 swings upward under the elastic force of the spring to drive the hook portion 24 to swing toward the reinforcing portion 13, so that the hook portion 24 tightens the steel mesh 5 toward the reinforcing portion 13. At this time, the steel mesh 5 is in a tension state. When the steel mesh 5 is removed, the air pipe inflates the air bag to squeeze the lower end of the swing lever 2 in the direction of the spring to compress the spring, so that the upper end of the swing lever 2 swings away from the reinforcing portion 13 to loosen the steel mesh 5. When the swing lever 2 loosens the steel mesh 5, the steel mesh 5 can be removed.

[0033] The net frame structure provided by the embodiment of the present application improves the positioning accuracy of the elastic member by arranging two mounting blocks matched with the first and second clamping grooves respectively and the elastic member abutting against the two mounting blocks. On the one hand, the stress direction of the elastic member tends to be the axial direction of the elastic member, which can improve the service life of the spring. On the other hand, the swing lever structure strength can be improved, and the tension and stability of the steel mesh can be further improved. In addition, when the elastic member is installed, the elastic member can be pre-installed, and then the mounting blocks are clamped to install the elastic member and the mounting blocks in the inner cavity of the frame body together, so that the elastic member is installed conveniently.

[0034] In the several embodiments provided by the present application, it should be understood that each functional module in the various embodiments can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0035] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wire frame structure, characterized in that, Includes a frame and a swing arm and elastic components connected to the frame; The frame includes a frame body, and the top surface of the inner cavity of the frame body is provided with an opening communicating with the inner cavity. The opening forms a pivot hole, and the two opposite first inner sidewalls of the inner cavity are respectively provided with a first slot. The upper end of the swing rod is rotatably engaged with the pivot hole and extends out of the inner cavity from the opening. The lower end of the swing rod is located inside the inner cavity and has a second outer wall corresponding to the first inner wall. The second outer wall forms a second slot corresponding to the first slot. The elastic component includes two mounting blocks, an elastic body, and an elastic element. One mounting block engages with a second slot, and the other mounting block engages with a first slot corresponding to the second slot. The elastic body engages within the other first slot and abuts against the lower end of the elastic element and the inner sidewall of the other first slot. Both ends of the elastic element abut against the two mounting blocks respectively.

2. The wire frame structure according to claim 1, characterized in that, The two first inner sidewalls extend inward to form a positioning block, and the two positioning blocks and the bottom wall of the inner cavity form two first slots. The second outer sidewall extends inward to form a limiting block, and the limiting block and the second outer sidewall and the bottom wall of the inner cavity form a second slot.

3. The wire frame structure according to claim 1, characterized in that, The first slot, the second slot, and the two mounting blocks extend along the length of the frame. The two mounting blocks are respectively fitted with the first slot and the second slot with a clearance. The two inner sidewalls of the two mounting blocks that are close to each other are respectively provided with at least one mounting hole. The two ends of the elastic member are respectively fitted with the two mounting holes and respectively abut against the inner wall of the two mounting holes.

4. The wire frame structure according to claim 3, characterized in that, Each mounting block has a plurality of mounting holes evenly distributed along the length of the frame. The mounting holes are blind holes, and one mounting hole of each mounting block corresponds to one mounting hole of another mounting block. There are multiple elastic elements, and the two ends of one elastic element are respectively clearance-fitted with the two corresponding mounting holes.

5. The wire frame structure according to claim 1, characterized in that, The two first inner sidewalls are respectively recessed outward to form a first groove, and the first groove forms a first slot. The second outer sidewall is recessed corresponding to the first groove to form a second groove, and the second groove forms a second slot.

6. The wire frame structure according to claim 1, characterized in that, The two first inner sidewalls extend inward to form a positioning block, and the two positioning blocks and the bottom wall of the inner cavity form two first slots. The lower end of the swing rod has a third outer sidewall opposite to the second outer sidewall. The third outer sidewall extends outward to form a stop block located above the positioning block. When the swing rod swings downward, it can abut against the positioning block.

7. The wire frame structure according to claim 1, characterized in that, The elastic element is a spring, and the elastic body is an airbag.

8. The wire frame structure according to claim 1, characterized in that, The inner cavity extends through both ends of the frame. The frame is a profile with its top surface recessed downwards to form a mounting groove. The opening is formed from the top surface of the mounting groove downwards. There are multiple profiles, which are connected end to end by connecting corner pieces. The upper end of the swing rod forms a hook for connecting the steel mesh and is located in the mounting groove.

9. The wire frame structure according to claim 1, characterized in that, The outer side wall of the frame extends outward to form a reinforcing part. The reinforcing part is hollow and a partition is provided in the middle of its receiving cavity. The two ends of the partition are respectively connected to the two opposite inner side walls of the receiving cavity, so that the partition divides the receiving cavity into two independent chambers distributed vertically.

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