A frame spacer for a display frame

By installing detachable frame pads on the display frame or LED display screen, the problem of mismatched display frame dimensions is solved, enabling effective assembly of different display elements and improving the display effect.

CN224329700UActive Publication Date: 2026-06-05SDAKO CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SDAKO CO LTD
Filing Date
2025-05-16
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In existing LED display platforms, the display frames cannot be fully spliced ​​due to mismatched dimensions, causing difficulties in construction.

Method used

Design a frame spacer that allows for the adjustment of the external dimensions of the display body by detachably setting the frame spacer on the display frame or LED display screen, enabling it to be assembled with display frames or LED displays of different sizes.

Benefits of technology

It enables the effective assembly of display frames or LED displays of different shapes and sizes, reducing the difficulty of construction and improving the display effect.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224329700U_ABST
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Abstract

The utility model relates to a kind of frame gaskets suitable for display frame, the frame gasket has gasket thickness size, N pieces the frame gasket is detachably connected on first display body, the first display body has first width size and first height size, when N pieces the frame gasket is set in the transverse position of the first display body, the transverse width size of the first display body is the sum of the first width size and N pieces the gasket thickness size, when N pieces the frame gasket is set in the longitudinal position of the first display body, the longitudinal height size of the first display body is the sum of the first height size and N pieces the gasket thickness size, the second display body has second width size and second height size, the second width size of the second display body is equal to the transverse width size of the first display body, the second height size of the second display body is equal to the longitudinal height size of the first display body.
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Description

Technical Field

[0001] This utility model relates to a gasket structure, specifically a detachable frame gasket that is mounted on a first display body so that the first display body and the second display body have the same external dimensions. The first display body is a display frame or an integrated LED display screen, and the second display body is a display frame or an integrated LED display screen. Background Technology

[0002] As we all know, LED displays, with their superior performance, are now widely used in various display fields, such as in showrooms and exhibitions.

[0003] like Figure 1 As shown, in the current exhibition field, the construction of an LED display platform generally consists of two parts: an LED display screen 1 and a display frame 2. Several LED display screens 1 are spliced ​​together to form an overall LED display screen 3. The display frame 2 is installed on one side of the overall LED display screen 3. When in use, the overall LED display screen 3 is powered on and illuminates to display promotional images and information. An advertising cloth 4 is installed on the display frame 2, and the advertising cloth 4 displays static information.

[0004] The advantages of the aforementioned LED display platform in practical use are described in detail below.

[0005] First, the aforementioned LED display platform includes an image display section and an advertising cloth display section. The image display section uses the overall LED display screen 3 to emit light and display promotional images and information, while the advertising cloth display section uses the advertising cloth 4 to display static information. The overall display methods are diverse and can significantly improve the display effect.

[0006] Secondly, since the display frame 2 combined with the advertising cloth 4 also has a display function, the display frame 2 can replace part of the display function of the overall LED display screen 3. However, since the cost of the display frame 2 is relatively low, the structure of the display frame 2 can significantly reduce the cost of the traditional LED display platform, thereby significantly reducing the overall display cost.

[0007] The use of display frame 2 provides many conveniences for setting up exhibitions, and can improve the display effect and reduce the display cost. However, the above-mentioned display frame 2 still has many shortcomings in specific use, which are described below.

[0008] like Figure 2As shown, in practice, display frames 2 generally have various external dimensions, such as display frame 2A with dimensions of 486MM*992MM and display frame 2B with dimensions of 500MM*1000MM. Since display frames 2A and 2B have different external dimensions, there will inevitably be a situation where the display frames are mismatched in size and cannot be completely spliced ​​together when they are assembled. This is the main drawback of traditional display frames. Utility Model Content

[0009] The technical solution adopted by this utility model is: a frame pad suitable for display frames, characterized in that: the frame pad has a pad thickness dimension, and N frames of the frame pad are detachably connected to the first display body, where N is greater than or equal to 1.

[0010] The first display body has a first width dimension and a first height dimension.

[0011] When N frame pads are positioned laterally on the first display body, the lateral width of the first display body is the sum of the first width and the thickness of the N pads.

[0012] When N frame pads are positioned longitudinally on the first display body, the longitudinal height of the first display body is the sum of the first height dimension and the thickness dimension of the N pads.

[0013] When N1 of the frame pads is positioned laterally on the first display body and N2 of the frame pads is positioned longitudinally on the first display body, the lateral width of the first display body is the sum of the first width and the thickness of N1 of the pads, and the longitudinal height of the first display body is the sum of the first height and the thickness of N2 of the pads, wherein the sum of N1 and N2 equals N.

[0014] The second display body has a second width dimension and a second height dimension.

[0015] When the second display body is assembled with the first display body, the second width dimension of the second display body is equal to the lateral width dimension of the first display body, and the second height dimension of the second display body is equal to the longitudinal height dimension of the first display body.

[0016] The first display body is a display frame or an overall LED display screen, and the second display body is the display frame or the overall LED display screen. The display frame is equipped with an advertising cloth that displays advertising information, and the overall LED display screen displays image information.

[0017] The beneficial effects of this utility model are as follows: The design concept of this utility model is to place N frame pads between the first display body and the second display body so that the first display body and the second display body have the same external dimensions, so as to achieve the purpose of assembling the first display body and the second display body with different external dimensions together. Attached Figure Description

[0018] Figure 1 This is a 3D schematic diagram of an existing LED display platform.

[0019] Figure 2 This is the front view of an existing LED display platform.

[0020] Figure 3 This is a schematic diagram showing the position of the frame gasket of this utility model.

[0021] Figure 4 This is another schematic diagram of the position of the frame gasket of this utility model.

[0022] Figure 5 This is a schematic diagram of the assembly of the first display body and the second display body of this utility model.

[0023] Figure 6 The first display element of this utility model is a display frame, and the second display element is an assembly diagram of an overall LED display screen.

[0024] Figure 7 The first display body of this utility model is an integrated LED display screen, and the second display body is an assembly diagram of the display frame.

[0025] Figure 8 This is a schematic diagram of an advertising cloth set on the display frame of this utility model.

[0026] Figure 9 This is a schematic diagram of how the frame gasket is detachably connected to the first display body via a frame connection structure.

[0027] Figure 10 This is a schematic diagram of how the first display body and the second display body are assembled together using a frame connection structure and frame spacers.

[0028] Figure 11 This utility model uses a frame connection structure to detachably connect the frame gasket to the first display body, and at the same time, uses the frame connection structure and frame gasket to assemble the first display body and the second display body together.

[0029] Figure 12 This is a schematic diagram showing the assembly bolt of this utility model passing through the gasket fixing hole of the frame gasket between the first frame beam and the second frame beam.

[0030] Figure 13 This is a schematic diagram showing the position of the frame gasket of this utility model.

[0031] Figure 14 This is a schematic diagram of the gasket stacking structure of this utility model.

[0032] Figure 15 This is a three-dimensional schematic diagram of the first embodiment of the frame gasket of this utility model.

[0033] Figure 16 This is another perspective view of the first embodiment of the frame gasket of this utility model.

[0034] Figure 17 This is a schematic diagram of the external protrusion of this utility model inserted into the first display body assembly hole or the second display body assembly hole.

[0035] Figure 18 This is a schematic diagram of the magnetic attractor of this utility model.

[0036] Figure 19 This is a schematic diagram of another embodiment of the magnetic chuck of this utility model.

[0037] Figure 20 This is a three-dimensional schematic diagram of the second embodiment of the frame gasket of this utility model.

[0038] Figure 21 This is another three-dimensional schematic diagram of the second embodiment of the frame gasket of this utility model.

[0039] Figure 22 This is a three-dimensional schematic diagram of the third embodiment of the frame gasket of this utility model.

[0040] Figure 23 This is another three-dimensional schematic diagram of the third embodiment of the frame gasket of this utility model.

[0041] Figure 24 This is a three-dimensional schematic diagram of the fourth embodiment of the frame gasket of this utility model.

[0042] Figure 25 This is another three-dimensional schematic diagram of the fourth embodiment of the frame gasket of this utility model. Detailed Implementation

[0043] like Figures 3 to 25 As shown, a frame pad 100 suitable for display frames is provided. The frame pad 100 has a pad thickness dimension T, and N frames of the frame pad 100 are detachably connected to a first display body 10, where N is greater than or equal to 1.

[0044] The first display body 10 has a first width dimension W1 and a first height dimension H1.

[0045] like Figures 3 to 4 As shown, when N frame pads 100 are positioned laterally on the first display body 10, the lateral width dimension WB1 of the first display body 10 is the sum of the first width dimension W1 and the thickness dimension T of the N pads, WB1 = W1 + N * T.

[0046] When N frame pads 100 are positioned in the longitudinal direction of the first display body 10, the longitudinal height dimension HB1 of the first display body 10 is the sum of the first height dimension H1 and the thickness dimension T of the N pads, HB1 = H1 + N * T.

[0047] When N1 of the frame pads 100 is positioned laterally on the first display body 10, and N2 of the frame pads 100 is positioned longitudinally on the first display body 10.

[0048] The lateral width dimension WB1 of the first display body 10 is the sum of the first width dimension W1 and the thickness dimension T of the N1 pads, WB1 = W1 + N1 * T.

[0049] The longitudinal height dimension HB1 of the first display body 10 is the sum of the first height dimension H1 and the thickness dimension T of the N2 pads, HB1 = H1 + N2 * T. Wherein, the sum of N1 and N2 is equal to N, N1 + N2 = N.

[0050] like Figure 5 As shown, the second display body 20 has a second width dimension W2 and a second height dimension H2.

[0051] When the second display body 20 is assembled with the first display body 10, the second width dimension W2 of the second display body 20 is equal to the lateral width dimension WB1 of the first display body 10. The second height dimension H2 of the second display body 20 is equal to the longitudinal height dimension HB1 of the first display body 10.

[0052] In other words, the design concept of this application is to place N frame pads 100 between the first display body 10 and the second display body 20, so that the first display body 10 and the second display body 20 have the same external dimensions, so as to achieve the purpose of assembling the first display body 10 and the second display body 20 with different external dimensions together.

[0053] like Figures 6 to 8 As shown, the first display body 10 is a display frame 30 or an overall LED display screen 40, and the second display body 20 is the display frame 30 or the overall LED display screen 40. The display frame 30 is provided with an advertising cloth 31, which displays advertising information, and the overall LED display screen 40 displays image information.

[0054] like Figure 7 As shown, in actual implementation, the overall LED display screen 40 is composed of several LED display screens 41 spliced ​​together.

[0055] In specific implementation, the first width dimension W1 is not equal to the second width dimension W2, or the first height dimension H1 is not equal to the second height dimension H2, or the first width dimension W1 is not equal to the second width dimension W2, and the first height dimension H1 is not equal to the second height dimension H2.

[0056] In specific implementation, the first width dimension W1 is 486MM, the first height dimension H1 is 992MM, the second width dimension W2 is 500MM, the second height dimension H2 is 1000MM, and the shim thickness dimension T is 4MM or 8MM.

[0057] like Figures 9 to 12 As shown, in specific implementation, the frame gasket 100 is provided with a frame connection structure 200.

[0058] like Figure 9 As shown, the frame connection structure 200 enables the frame pad 100 to be detachably connected to the first display body 10.

[0059] like Figure 10 As shown, the frame connection structure 200 enables the first display body 10 and the second display body 20 to be assembled together using the frame spacer 100.

[0060] like Figures 11 to 13 As shown, the frame connection structure 200 allows the frame pad 100 to be detachably connected to the first display body 10. At the same time, the frame connection structure 200 also allows the frame pad 100 to be used to assemble the first display body 10 and the second display body 20 together.

[0061] In practice, there are various structures that can achieve the function of the frame connection structure 200. The following describes a preferred embodiment of the frame connection structure 200.

[0062] The frame connection structure 200 includes a gasket fixing hole 210 and a mounting bolt 230.

[0063] The gasket fixing hole 210 is provided on the frame gasket 100. Corresponding to the gasket fixing hole 210, several first display body assembly holes 220 are provided around the first display body 10.

[0064] Corresponding to the gasket fixing hole 210, several second display body assembly holes 240 are provided around the second display body 20.

[0065] The first display body 10 includes a first frame beam 11, and the second display body 20 includes a second frame beam 21. A plurality of first display body mounting holes 220 are provided on the first frame beam 11, and a plurality of second display body mounting holes 240 are provided on the second frame beam 21.

[0066] like Figure 9 As shown, when the frame gasket 100 is detachably connected to the first display body 10 through the frame connection structure 200, the mounting bolt 230 passes through the gasket fixing hole 210 and the first display body mounting hole 220, and the mounting bolt 230 detachably fixes the frame gasket 100 to the first display body 10.

[0067] like Figure 10 As shown, when the first display body 10 and the second display body 20 are assembled together by means of the frame connection structure 200 and the frame spacer 100.

[0068] The mounting bolt 230 is simultaneously inserted into the first display body mounting hole 220, the second display body mounting hole 240, and the gasket fixing hole 210. The first frame beam 11 and the second frame beam 21 are sandwiched between the mounting bolt 230 and the frame gasket 100.

[0069] Through the above-described connection, the first display body 10 and the second display body 20 can be detachably assembled together via the mounting bolt 230 and the frame gasket 100.

[0070] like Figures 11 to 13 As shown, the frame pad 100 is detachably connected to the first display body 10 via the frame connection structure 200. At the same time, the first display body 10 and the second display body 20 are assembled together via the frame connection structure 200 and the frame pad 100.

[0071] Several frame gaskets 100 are disposed between the first frame beam 11 and the second frame beam 21, and several other frame gaskets 100 are disposed on the inner side of the first frame beam 11 or the second frame beam 21.

[0072] The mounting bolt 230 passes through the first display body mounting hole 220, the second display body mounting hole 240, and the fixing holes 210 of several other frame gaskets 100. The first frame beam 11, the second frame beam 21, and several frame gaskets 100 between the first frame beam 11 and the second frame beam 21 are sandwiched between the mounting bolt 230 and several other frame gaskets 100.

[0073] Through the above connection, the first display body 10 and the second display body 20 can be detachably assembled together by the mounting bolt 230 and several other frame gaskets 100, while several frame gaskets 100 are placed between the first display body 10 and the second display body 20.

[0074] like Figure 11 As shown, in practice, a frame pad 100 can also be placed between the first frame beam 11 and the second frame beam 21.

[0075] like Figure 12 As shown, the mounting bolt 230 can also be simultaneously inserted into the gasket fixing holes 210 of several frame gaskets 100 between the first frame beam 11 and the second frame beam 21.

[0076] In practice, the gasket fixing hole 210 is a threaded hole, and the mounting bolt 230 is a bolt.

[0077] like Figure 14 As shown, in specific implementation, the frame pad 100 is provided with a pad stacking structure 300, which allows N frame pads 100 to be stacked together, so as to facilitate the stacking of N frame pads 100, and at the same time facilitate the storage and transportation of the frame pads 100.

[0078] like Figure 15 , 16 As shown, the gasket stacking structure 300 includes an outer boss 310 and an inner cavity 320, wherein the outer boss 310 protrudes from one side of the frame gasket 100, and the inner cavity 320 is recessed on the other side of the frame gasket 100.

[0079] When N frame gaskets 100 are stacked together, the outer protrusion 310 of one frame gasket 100 is inserted into the inner cavity 320 of another frame gasket 100, so that N frame gaskets 100 can be stacked together.

[0080] In practice, the gasket fixing hole 210 is located on the top of the outer boss 310, and the gasket fixing hole 210 is connected to the inner cavity 320.

[0081] In practice, the outer protrusion 310 is cylindrical, the inner cavity 320 is a cylindrical inner cavity, and the gasket fixing hole 210 is a circular hole.

[0082] like Figure 17As shown, in a specific implementation, the outer protrusion 310 can be inserted into the first display body assembly hole 220 or the second display body assembly hole 240 to achieve the positioning between the frame pad 100 and the first display body 10 or the second display body 20, so as to facilitate assembly.

[0083] like Figure 18 , 19 As shown, in a specific implementation, the gasket stacking structure 300 also includes a magnetic 330, which is disposed on the frame gasket 100.

[0084] When N frame pads 100 are stacked together, the magnetic body 330 of one frame pad 100 is magnetically attracted to the magnetic body 330 of another frame pad 100, so as to facilitate the stacking of N frame pads 100.

[0085] When the frame pad 100 is connected to the first display body 10, the magnetic body 330 is magnetically attracted to the first frame beam 11 to facilitate the positioning between the frame pad 100 and the first display body 10. At the same time, it facilitates the assembly and disassembly of the frame pad 100.

[0086] In practical implementation, the frame pad 100 is provided with a magnet hole 331, and the magnetic attractor 330 is disposed in the magnet hole 331. In practice, the magnetic attractor 330 is disposed at the upper and lower ends of the frame pad 100 respectively.

[0087] like Figure 15 , 16 As shown in Figures 20 and 21, in a specific implementation, the frame pad 100 is provided with a fabric groove 400. When the frame pad 100 is connected to the first display body 10, the edge of the advertising cloth 31 can be inserted into the fabric groove 400 to facilitate the assembly and fixing of the advertising cloth 31.

[0088] When the frame pad 100 on the first display body 10 is disassembled, or when the N stacked frame pads 100 are separated, the gusset groove 400 can be easily disassembled or separated. Specifically, a human finger can be inserted into the gusset groove 400 to facilitate disassembly or separation.

[0089] The card slot 400 is located on the side of the frame pad 100.

[0090] In practice, the frame pad 100 is a rectangular cube, and the camber groove 400 is symmetrically arranged on both sides of the frame pad 100.

[0091] like Figure 20 , 21As shown below, this is one embodiment of the cam groove 400. Specifically, the cam groove 400 includes a groove body 410 and an opening 420. The opening 420 is connected to one side of the groove body 410. The frame pad 100 is connected to the first display body 10. The outer surface of the first frame beam 11 covers the opening 420. The cam groove 400 is formed by the outer surface, the side wall 411 of the groove body 410, and the bottom surface 412 of the groove.

[0092] like Figure 15 , 16 As shown in Figure 18, this is a first preferred embodiment of the frame gasket 100, such as... Figure 19 , 20 As shown in Figure 21, this is a second preferred embodiment of the frame gasket 100, wherein the two types of frame gaskets 100 can be used individually or together.

[0093] In practical implementation, the frame gasket 100 can also be designed as other structures, as described below.

[0094] like Figure 22 , 23 As shown, this is a third preferred embodiment of the frame pad 100. The thickness T of the pad 100 is 8 mm. The magnetic body 330 includes a magnetic block 332 and a central iron plate 333. The central iron plate 333 also has a pad fixing hole 210.

[0095] like Figure 24 , 25 As shown, this is the fourth preferred embodiment of the frame pad 100. The thickness T of the pad is 4 mm. The magnetic body 330 includes an end iron plate 334 and a central iron plate 333. The central iron plate 333 also has a pad fixing hole 210.

[0096] In the third and fourth preferred embodiments described above, the central iron plate 333 corresponds to the magnetic block on the display frame 30 or the overall LED display screen 40 to achieve magnetic positioning. In the third preferred embodiment described above, the magnetic block 332 can be magnetically attracted to the display frame 30 or the overall LED display screen 40. In the third and fourth preferred embodiments described above, the frame pads 100 can be stacked together, so that the overall thickness of the pads can be 12 mm, 16 mm, 20 mm, etc. In addition, when the frame pads 100 are stacked together in the third and fourth preferred embodiments, the magnetic block 332 can provide magnetic attraction between the pads.

Claims

1. A frame pad suitable for display frames, characterized in that: The frame spacer has a spacer thickness dimension, and N such frame spacers are detachably connected to the first display body, where N is greater than or equal to 1. The first display body has a first width dimension and a first height dimension. When N frame pads are positioned laterally on the first display body, the lateral width of the first display body is the sum of its width and the thickness of the N pads. When N frame pads are positioned longitudinally on the first display body, the longitudinal height of the first display body is the sum of its height and the thickness of the N pads. When N1 of the frame pads is positioned laterally on the first display body and N2 of the frame pads is positioned longitudinally on the first display body, the lateral width of the first display body is the sum of the first width dimension and the thickness dimension of N1 of the pads, and the longitudinal height of the first display body is the sum of the first height dimension and the thickness dimension of N2 of the pads, wherein the sum of N1 and N2 equals N; The second display body has a second width dimension and a second height dimension. When the second display body is assembled with the first display body, the second width dimension of the second display body is equal to the lateral width dimension of the first display body, and the second height dimension of the second display body is equal to the longitudinal height dimension of the first display body; The first display body is a display frame or an overall LED display screen, and the second display body is the display frame or the overall LED display screen. The display frame is equipped with an advertising cloth that displays advertising information, and the overall LED display screen displays image information.

2. A frame pad suitable for display frames as described in claim 1, characterized in that: The frame pad is provided with a frame connection structure, through which the frame pad can be detachably connected to the first display body; through the frame connection structure, the first display body and the second display body can be assembled together using the frame pad; through the frame connection structure, the frame pad can be detachably connected to the first display body, and at the same time, through the frame connection structure, the first display body and the second display body can be assembled together using the frame pad.

3. A frame pad suitable for display frames as described in claim 1, characterized in that: The frame gasket is provided with a frame connection structure, which includes a gasket fixing hole and a mounting bolt. The gasket fixing hole is provided on the frame gasket and corresponds to the gasket fixing hole. Several first display body mounting holes are provided around the first display body and correspond to the gasket fixing hole. Several second display body mounting holes are provided around the second display body. The first display body includes a first frame beam and the second display body includes a second frame beam. Several first display body mounting holes are provided on the first frame beam and several second display body mounting holes are provided on the second frame beam.

4. A frame pad suitable for display frames as described in claim 3, characterized in that: When the frame gasket is detachably connected to the first display body through the frame connection structure, the mounting bolt passes through the gasket fixing hole and the first display body mounting hole, and the mounting bolt detachably fixes the frame gasket to the first display body. When the first display body and the second display body are assembled together through the frame connection structure and using the frame gasket, the mounting bolt is simultaneously inserted into the first display body assembly hole, the second display body assembly hole and the gasket fixing hole, and the first frame beam and the second frame beam are sandwiched between the mounting bolt and the frame gasket. The frame gasket is detachably connected to the first display body through the frame connection structure. At the same time, when the first display body and the second display body are assembled together through the frame connection structure and using the frame gasket, several frame gaskets are placed between the first frame beam and the second frame beam, and several other frame gaskets are placed inside the first frame beam or the second frame beam. The mounting bolt passes through the mounting hole of the first display body, the mounting hole of the second display body, and the gasket fixing hole of several other frame gaskets. Several frame gaskets between the first frame beam, the second frame beam, and the first frame beam and the second frame beam are sandwiched between the mounting bolt and several other frame gaskets.

5. A frame pad suitable for display frames as described in any one of claims 1 to 4, characterized in that: The frame gasket is provided with a gasket stacking structure, which includes an outer boss and an inner cavity. The outer boss protrudes from one side of the frame gasket, and the inner cavity is recessed on the other side of the frame gasket.

6. A frame pad suitable for display frames as described in claim 1, characterized in that: The frame gasket is provided with a frame connection structure, which includes gasket fixing holes and mounting bolts. The gasket fixing holes are located on the frame gasket, corresponding to the gasket fixing holes. Several first display body mounting holes are provided around the first display body, corresponding to the gasket fixing holes. Several second display body mounting holes are provided around the second display body. The first display body includes a first frame beam, and the second display body includes a second frame beam. Several first display body mounting holes are located on the first frame beam, and several second display body mounting holes are located on the second frame beam. The frame gasket is provided with a gasket stacking structure, which includes an outer boss and an inner cavity. The outer boss protrudes from one side of the frame gasket, and the inner cavity is recessed on the other side of the frame gasket.

7. A frame pad suitable for display frames as described in claim 6, characterized in that: The gasket fixing hole is located on the top of the outer boss, and the gasket fixing hole is connected to the inner cavity.

8. A frame pad suitable for display frames as described in claim 6, characterized in that: The stacked pad structure also includes a magnetic attractor disposed on the frame pad. When N of these frame pads are stacked together, the magnetic element of one frame pad is magnetically attracted to the magnetic element of another frame pad. When the frame pad is attached to the first display body, the magnetic accumulator is magnetically attached to the first frame beam.

9. A frame pad suitable for display frames as described in claim 6, characterized in that: The frame pad is provided with a fabric slot, and when the frame pad is connected to the first display body, the edge of the advertising cloth can be inserted into the fabric slot.

10. A frame pad suitable for display frames as described in claim 9, characterized in that: The caulking groove includes a groove body and an opening. The opening is connected to one side of the groove body. The frame pad is connected to the first display body. The outer surface of the first frame beam covers the opening. The caulking groove is formed by the outer surface, the side wall of the groove body, and the bottom surface of the groove.