Printing film tray

By designing the detachable bracket and pallet structure, the existing impression tray is easily deformed or damaged during the demolding operation, achieving the stability and accuracy of the impression, and simplifying the operation process.

CN222130284UActive Publication Date: 2024-12-10泰康仙林鼓楼医院有限公司
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Patent Information

Application Number
CN202420600989.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-26
Publication Date
2024-12-10
Estimated Expiration
2034-03-26

AI Technical Summary

Technical Problem

The existing impression tray dedicated to oral dental implants has a simple structure, which can easily lead to impression deformation or tray damage during the demolding operation.

Method used

A film printing tray including a bracket and a tray is designed, the bracket consisting of a first side plate, a second side plate and a bottom plate structure, and the tray has a cavity for accommodating the bracket, which simplifies the loading and unloading process through a detachable structure. , ensure the accuracy and stability of the impression.

Benefits of technology

Effectively prevent the impression from displaced during operation, simplifying the loading, unloading and disassembly of the impression, avoiding tray damage, and improving the accuracy and stability of the impression production.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a printing film tray, which belongs to the technical field of medical assistance and comprises a bracket and a tray. The supporting groove comprises a first side plate, a second side plate and a bottom plate structure located between the first side plate and the second side plate, the first side plate and the second side plate are connected through the bottom plate structure, a gap is formed between the first side plate and the second side plate, and a groove body used for containing impression materials is formed through the first side plate, the second side plate and the bottom plate structure. The tray is provided with a cavity which is used for containing the bracket. That is to say, the first side plate, the second side plate and the bottom plate form the supporting groove with the groove body, and the groove body can be used for containing the impression material so as to ensure the accuracy of the impression. The supporting groove is borne by the tray with the cavity, the stabilizing effect is achieved, and displacement of the impression in the operation process is prevented. The supporting groove and the tray which are of a detachable structure can effectively simplify the assembling, disassembling and disassembling processes, complete impression is obtained, and the tray is effectively prevented from being damaged.
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Description

Technical Field

[0001] The embodiments of the present application relate to the field of medical auxiliary technology, and specifically to a film printing tray. Background Art

[0002] In the field of oral implants, impression trays are an important tool for obtaining an accurate model of the patient's mouth. Usually, during the impression process, the mold mud is placed in the tray, and then the tray is placed in the patient's mouth for impression operation to obtain a model that matches the patient's oral structure.

[0003] However, most of the existing impression trays for oral implants have a relatively simple structure, and during the demoulding operation, the impression tray is turned over on the table to remove the impression, which may cause deformation of the impression or even damage the tray. Utility Model Content

[0004] The embodiment of the present application provides an impression tray. After the impression is completed, the bracket is separated from the cavity of the tray, and the first side plate, the second side plate and the bottom plate structure of the bracket are disassembled in sequence to obtain a complete impression in the bracket body.

[0005] The embodiments of the present application provide the following technical solutions to solve the above technical problems:

[0006] The present application embodiment provides a printing film tray, comprising:

[0007] A bracket, the bracket comprising a first side plate and a second side plate, and a bottom plate structure located between the first side plate and the second side plate, the first side plate and the second side plate are connected through the bottom plate structure, and there is a gap between the first side plate and the second side plate, and a groove body for accommodating an impression material is formed by the first side plate, the second side plate and the bottom plate structure;

[0008] A tray is provided with a cavity, and the cavity is used to accommodate the bracket.

[0009] Beneficial effects of the embodiments of the present application: The printing film tray provided in the embodiments of the present application includes a bracket and a tray. Among them, the bracket includes a first side panel and a second side panel, and a bottom plate structure located between the first side panel and the second side panel, the first side panel and the second side panel are connected through the bottom plate structure, and there is a gap between the first side panel and the second side panel, and a groove body for accommodating the printing material is formed by the first side panel, the second side panel and the bottom plate structure. The tray has a cavity, and the cavity is used to accommodate the bracket. That is to say, by forming a bracket with a groove body composed of the first side panel, the second side panel and the bottom plate structure, the groove body can be used to accommodate the printing material to ensure the accuracy of the printing. The tray with a cavity carries the bracket, so as to achieve a stable effect and prevent the displacement of the printing during operation. The bracket and tray with a detachable structure can effectively simplify the loading and unloading and disassembly process to obtain a complete printing, and effectively prevent damage to the tray.

[0010] In a possible implementation manner, at least two first plug blocks are provided on the first side plate, and the first side plate is connected to the bottom plate structure through the first plug blocks;

[0011] At least two second plug blocks are disposed on the second side plate, and the second side plate is connected to the bottom plate structure via the second plug blocks.

[0012] In a possible implementation, the bottom plate structure includes a first bottom plate and a second bottom plate, and an inner edge of the first bottom plate is connected to an outer edge of the second bottom plate.

[0013] In a possible implementation manner, a slide groove is provided on the inner edge of the first bottom plate, and the slide groove is used to connect with the second bottom plate.

[0014] In a possible implementation manner, slide rails are provided on all outer edges of the second bottom plate, and the slide rails are located in the slide grooves of the second bottom plate, so that the second bottom plate is connected to the first bottom plate;

[0015] Alternatively, a sliding block is provided on at least part of the outer edge of the second bottom plate, and the sliding block is located in the sliding groove of the first bottom plate, so that the second bottom plate is connected to the first bottom plate.

[0016] In a possible implementation manner, a first slot is provided on one side of the first bottom plate close to the outer edge, and the first slot is used to connect with the first plug block on the first side plate;

[0017] A second slot is provided on one side of the second bottom plate close to the inner edge, and the second slot is used to connect with the second plug block on the second side plate.

[0018] In a possible implementation manner, a positioning seat is further provided on a surface of the bottom plate structure facing away from the bracket, and the bottom plate structure is connected to the bottom of the cavity of the tray via the positioning seat.

[0019] In a possible implementation, the positioning seat includes a first mounting seat and a second mounting seat;

[0020] The first mounting seat is located on a surface of the first bottom plate facing away from the bracket, and the first mounting seat is close to an inner edge of the first bottom plate;

[0021] The second mounting seat is located on a surface of the second bottom plate facing away from the bracket, and the second mounting seat is close to an outer edge of the second bottom plate.

[0022] In a possible implementation, a through positioning hole is provided on the bracket, the positioning hole is located at the bottom end of the cavity, and the positioning hole is used to fix the positioning seat so that the bottom surface of the bottom plate structure fits with the cavity of the tray.

[0023] In a possible implementation manner, the bracket further includes a handle.

[0024] In addition to the technical problems solved by the present application, the technical features that constitute the technical solution, and the beneficial effects brought about by the technical features of the technical solution described above, other technical problems that can be solved by a printing film tray provided by the present application, other technical features included in the technical solution, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application for those skilled in the art by referring to specific embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a tray for a printing film tray provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the bracket structure of the printing film tray provided in an embodiment of the present application;

[0028] Figure 3 An exploded view of the bracket of the printing film tray provided in an embodiment of the present application;

[0029] Figure 4 A bottom view of the bracket of the printing film tray provided in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100- bracket; 110- slot body;

[0032] 120-first side plate; 130-second side plate; 140-bottom plate structure; 150-first bottom plate; 160-second bottom plate; 170-positioning seat;

[0033] 121-first plug-in block; 131-second plug-in block;

[0034] 141-first slot; 142-second slot;

[0035] 151-chute;

[0036] 161-slider;

[0037] 171-first mounting seat; 172-second mounting seat;

[0038] 200-tray; 210-cavity; 220-positioning hole; 230-handle. DETAILED DESCRIPTION

[0039] At present, the structure of the existing impression tray for oral implants is relatively simple. The mold mud is placed in the tray, and then the tray is sent into the patient's mouth to make an impression and repeat the operation many times, and finally a model that matches the patient's mouth is obtained. However, the demoulding operation is the most complicated. The impression is usually poured out by inverting the tabletop, but this may cause the impression to deform or even damage the tray.

[0040] In view of this, the embodiment of the present application is provided with a bracket having a slot body composed of a first side plate, a second side plate and a bottom plate structure, and a tray for carrying the bracket cavity. The bracket is supported by the tray, and the brackets support each other to achieve a stable effect, effectively preventing the displacement of the mold during operation. The bracket with a detachable structure simplifies the process of loading and unloading and disassembly, making the operation more convenient, helping to easily remove the completed mold after the mold is made, and effectively preventing damage to the tray.

[0041] Figure 1 A schematic diagram of the structure of a printing film tray provided in an embodiment of the present application, Figure 2 A schematic diagram of the bracket structure of the printing film tray provided in an embodiment of the present application, Figure 3 An exploded view of the bracket of the printing film tray provided in an embodiment of the present application, Figure 4 A bottom view of the bracket of the printing film tray provided in an embodiment of the present application.

[0042] The embodiment of the present application provides a printing film tray 200, which includes a bracket 100 and a tray 200. The bracket 100 includes a first side plate 120 and a second side plate 130, and a bottom plate structure 140 located between the first side plate 120 and the second side plate 130. The first side plate 120 and the second side plate 130 are connected through the bottom plate structure 140, and there is a gap between the first side plate 120 and the second side plate 130. The first side plate 120, the second side plate 130 and the bottom plate structure 140 form a groove body 110 for accommodating the printing material. The tray 200 has a cavity 210, and the cavity 210 is used to accommodate the bracket 100.

[0043] like Figure 1 As shown, the tray 200 has a cavity 210 and a handle 230. The cavity 210 is used to accommodate the bracket 100, so that the bracket 100 is firmly placed on the tray 200, and the bracket 100 is not easily displaced or dropped. The tray 200 can provide a stable support for the bracket 100 to prevent the mold mud in the bracket 100 from having an incomplete impression. The setting of the handle 230 makes it convenient for the operator to grasp and move the tray 200.

[0044] like Figure 2 As shown, the bracket 100 may include a first side plate 120, a second side plate 130 and a bottom plate structure 140. There is a certain interval between the first side plate 120 and the second side plate 130, and one end of the first side plate 120 and the second side plate 130 is detachably connected to the bottom plate structure 140. The first side plate 120, the second side plate 130 and the bottom plate structure 140 form a trough body 110 for accommodating mold mud, which ensures that the mold material is fully accommodated and the accuracy of mold making is ensured.

[0045] Combination Figure 1 and Figure 2 It can be understood that the bracket 100 can be placed in the cavity 210 of the tray 200, and the outer surface of the bracket 100 is tightly fitted with the inner surface of the cavity 210, which can not only enhance the stability between the bracket 100 and the tray 200, but also ensure the uniform distribution of the impression material in the slot 110, thereby further improving the accuracy of the impression.

[0046] In some embodiments of the present application, at least two first plug blocks 121 are provided on the first side plate 120, and the first side plate 120 is connected to the bottom plate structure 140 through the first plug blocks 121. At least two second plug blocks 131 are provided on the second side plate 130, and the second side plate 130 is connected to the bottom plate structure 140 through the second plug blocks 131.

[0047] In a possible implementation, at least two first plug-in blocks 121 are provided on the first side plate 120, but it is not limited to two first plug-in blocks 121, for example, three or four first plug-in blocks 121. Figure 3 As shown, the first side plate 120 is provided with three first plug blocks 121, and the three first plug blocks 121 are symmetrically arranged along the center of the first side plate 120. Similarly, the second side plate 130 is provided with at least two second plug blocks 131, but is not limited to two second plug blocks 131, for example, three or four second plug blocks 131. In the example of the present application, Figure 3 As shown, three second inserting blocks 131 are disposed on the second side plate 130 , and the three second inserting blocks 131 are symmetrically arranged along the center of the second side plate 130 .

[0048] In the example of the present application, the first plug block 121 and the second plug block 131 may be rectangular, but are not limited to rectangles, and may be other shapes. It should be noted that the shape, position and number of the first plug block 121 and the second plug block 131 are not limited to the above settings, and may be asymmetrical settings, for example. It is understood that the symmetrical arrangement of the first plug block 121 and the second plug block 131 has a more stable effect.

[0049] Combination Figure 2 and Figure 3 As shown, the first side plate 120 is connected to the bottom plate structure 140 through the first plug block 121, and the second side plate 130 is connected to the bottom plate structure 140 through the second plug block 131. Due to the detachable connection between the first plug block 121, the second plug block 131 and the bottom plate structure 140, the operator can easily disassemble and assemble the bracket 100 when it needs to be cleaned, repaired or replaced, which greatly improves work efficiency and convenience.

[0050] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the bottom plate structure 140 includes a first bottom plate 150 and a second bottom plate 160, and the inner edge of the first bottom plate 150 is connected to the outer edge of the second bottom plate 160. In a possible implementation, a slide groove 151 is provided on all inner edges of the first bottom plate 150, and a slide rail is provided on all outer edges of the second bottom plate 160, and the inner edge of the first bottom plate 150 is connected to the outer edge of the second bottom plate 160 through the slide rail and the slide groove 151, and the slide rail and the slide groove 151 realize the function of limiting.

[0051] In another possible implementation, a slide groove 151 is provided on the entire inner edge of the first base plate 150, and a slide rail is provided on a part of the outer edge of the second base plate 160. The inner edge of the first base plate 150 is connected to the outer edge of the second base plate 160 through the slide rail and the slide groove 151, and the limiting function is achieved through the slide rail and the slide groove 151.

[0052] In another possible implementation, a slide groove 151 may be provided on part of the inner edge of the first bottom plate 150, and a slider 161 may be provided on at least part of the outer edge of the second bottom plate 160. The first slider 161 on the second bottom plate 160 is located in the slide groove 151 of the first bottom plate 150, and the inner edge of the first bottom plate 150 is connected to the outer edge of the second bottom plate 160 through the slider 161 and the slide groove 151, and the limiting function is achieved through the slider 161 and the slide groove 151.

[0053] In some embodiments of the present application, a first slot 141 is provided on one side of the first bottom plate 150 close to the outer edge, and the first slot 141 is used to connect with the first plug block 121 on the first side plate 120. A second slot 142 is provided on one side of the second bottom plate 160 close to the inner edge, and the second slot 142 is used to connect with the second plug block 131 on the second side plate 130.

[0054] like Figure 3 As shown, a first slot 141 is provided on one side of the first base plate 150 close to the outer edge, and the first base plate 150 and the first side plate 120 are vertically connected through the first slot 141 and the first plug block 121. A second slot 142 is provided on one side of the second base plate 160 close to the inner edge, and the second base plate 160 and the second side plate 130 are vertically connected through the second slot 142 and the second plug block 131, so as to prevent the bracket 100 from loosening or deforming during use.

[0055] In the embodiment of the present application, the number of the first slots 141 on the first base plate 150 may be two, but is not limited to two. Figure 3 As shown, the number of the first slots 141 on the first base plate 150 is three. The number of the second slots 142 on the second base plate 160 may be two, but is not limited to two. Figure 3 As shown, the number of the second slots 142 on the second base plate 160 is three.

[0056] In a possible implementation, the first slot 141 on the first bottom plate 150 and the second slot 142 on the second bottom plate 160 may also be arranged along all edges. It is understandable that the opening positions of the first slot 141 and the second slot 142 on the bottom plate structure 140 need to be consistent with the first plug block 121 on the first side plate 120 and the second plug block 131 on the second side plate 130.

[0057] In some embodiments of the present application, a positioning seat 170 is further provided on the side of the bottom plate structure 140 facing away from the bracket 100, and the bottom plate structure 140 is connected to the bottom of the cavity 210 of the tray 200 through the positioning seat 170. Figure 4As shown, the bottom plate structure 140 is also provided with a positioning seat 170 connected to the bottom of the cavity 210 of the tray 200, and the positioning seat 170 is used to accurately position and firmly connect the bottom plate structure 140 and the bottom of the cavity 210 of the tray 200. The number of positioning seats 170 on the bottom plate structure 140 can be set to any number, such as two, three or four. In the embodiment of the present application, the number of positioning seats 170 is three, and the positioning seats 170 are arranged symmetrically along the bottom plate structure 140.

[0058] In the embodiment of the present application, the shape of the positioning seat 170 is rectangular, but is not limited to a rectangle, and can also be a circle, etc. It should be noted that the number, shape and position of the positioning seat 170 can be but are not limited to the above settings, and the number, shape and position of the positioning seat 170 can be set according to actual needs.

[0059] In one possible implementation, Figure 3 and Figure 4 As shown, the positioning seat 170 includes a first mounting seat 171 and a second mounting seat 172, wherein the first mounting seat 171 is disposed on a surface of the first bottom plate 150 that faces away from the bracket 100, and the first mounting seat 171 is close to the inner edge of the first bottom plate 150. The second mounting seat 172 is disposed on a surface of the second bottom plate 160 that faces away from the bracket 100, and the second mounting seat 172 is close to the outer edge of the second bottom plate 160.

[0060] It can be understood that when the inner edge of the first bottom plate 150 and the outer edge of the second bottom plate 160 are connected, the first mounting seat 171 on the first bottom plate 150 and the second mounting seat 172 on the second bottom plate 160 are connected to form a positioning seat 170, which is connected to the bottom of the cavity 210 of the tray 200 through the first mounting seat 171 on the first bottom plate 150 and the second mounting seat 172 on the second bottom plate 160, so that the first bottom plate 150 and the second bottom plate 160 can fit tightly on the bottom of the cavity 210 of the tray 200.

[0061] In some embodiments of the present application, Figure 1 As shown, the bracket 100 is provided with a through positioning hole 220, which is located at the bottom end of the cavity 210. The positioning hole 220 is used to fix the positioning seat 170 so that the bottom surface of the bottom plate structure 140 fits with the cavity 210 of the tray 200. It should be noted that the number of positioning holes 220 can be any number, such as two, three or four. Figure 1 As shown, in the embodiment of the present application, there are three positioning holes 220. It should be noted that the number and position of the positioning holes 220 can be but are not limited to the above settings, and the position and number of the positioning holes 220 and the positioning seat 170 can be consistent, and the number and position of the positioning holes 220 can be set according to actual needs.

[0062] It is understandable that when the bottom of the bottom plate structure 140 facing away from the bracket 100 is in contact with the bottom of the cavity 210 of the tray 200, the positioning seat 170 on the bottom plate structure 140 is located in the positioning hole 220 on the tray 200. In other words, through the coordinated use of the positioning seat 170 and the positioning hole 220, the connection between the bracket 100 and the tray 200 is more stable and reliable, providing more accurate and stable support for the impression making.

[0063] In a possible implementation, the first side plate 120, the second side plate 130, the first bottom plate 150 and the second bottom plate 160 are spliced ​​together through the first slot 141, the first plug block 121, the second slot 142, the second plug block 131, the slide rail and the slide block 161 to form a bracket 100 with a slot body 110, and the bracket 100 is fixed in the cavity 210 of the tray 200 through the positioning hole 220 and the positioning seat 170. When the mold is completed, the positioning seat 170 in the positioning hole 220 can be ejected by using a push rod, a push rod or other tools, so that the bracket 100 with the mold is separated from the tray 200, and the first side plate 120, the second side plate 130, the first bottom plate 150 and the second bottom plate 160 are disassembled and separated in turn to obtain a complete mold.

[0064] Among them, the terms "upper" and "lower" are used to describe the relative position relationship of each structure in the accompanying drawings, which is only for the convenience of description and is not used to limit the scope of implementation of the present application. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of the present application without substantially changing the technical content.

[0065] It should be noted that: in this application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] In addition, in this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A printing film tray, characterized in that: include: A bracket, the bracket comprising a first side plate and a second side plate, and a bottom plate structure located between the first side plate and the second side plate, the first side plate and the second side plate are connected through the bottom plate structure, and there is a gap between the first side plate and the second side plate, and a groove body for accommodating an impression material is formed by the first side plate, the second side plate and the bottom plate structure; A tray is provided with a cavity, and the cavity is used to accommodate the bracket.

2. The printing film tray according to claim 1, characterized in that: At least two first plug blocks are provided on the first side plate, and the first side plate is connected to the bottom plate structure through the first plug blocks; At least two second plug blocks are disposed on the second side plate, and the second side plate is connected to the bottom plate structure via the second plug blocks.

3. The printing film tray according to claim 2, characterized in that: The bottom plate structure includes a first bottom plate and a second bottom plate, and an inner edge of the first bottom plate is connected to an outer edge of the second bottom plate.

4. The printing film tray according to claim 3, characterized in that: A slide groove is provided on the inner edge of the first bottom plate, and the slide groove is used to connect with the second bottom plate.

5. The printing film tray according to claim 4, characterized in that: Slide rails are provided on all outer edges of the second bottom plate, and the slide rails are located in the slide grooves of the second bottom plate, so that the second bottom plate is connected to the first bottom plate; Alternatively, a sliding block is provided on at least part of the outer edge of the second bottom plate, and the sliding block is located in the sliding groove of the first bottom plate, so that the second bottom plate is connected to the first bottom plate.

6. The printing film tray according to claim 5, characterized in that: A first slot is provided on one side of the first bottom plate close to the outer edge, and the first slot is used to connect with the first plug block on the first side plate; A second slot is provided on one side of the second bottom plate close to the inner edge, and the second slot is used to connect with the second plug block on the second side plate.

7. The printing film tray according to claim 6, characterized in that: A positioning seat is also provided on a surface of the bottom plate structure facing away from the bracket, and the bottom plate structure is connected to the bottom of the cavity of the tray through the positioning seat.

8. The printing film tray according to claim 7, characterized in that: The positioning seat includes a first mounting seat and a second mounting seat; The first mounting seat is located on a surface of the first bottom plate facing away from the bracket, and the first mounting seat is close to an inner edge of the first bottom plate; The second mounting seat is located on a surface of the second bottom plate facing away from the bracket, and the second mounting seat is close to an outer edge of the second bottom plate.

9. The printing film tray according to claim 8, characterized in that: The tray is provided with a through positioning hole, the positioning hole is located at the bottom end of the cavity, and the positioning hole is used to fix the positioning seat so that the bottom surface of the bottom plate structure fits with the cavity of the tray.

10. The printing film tray according to claim 9, characterized in that: The bracket also includes a handle.