Improved coating jig

Abstract

The utility model provides an improved coating jig. The improved coating jig comprises a supporting part, a base part and a coating auxiliary part, a first through hole is formed in the base part, and a second through hole is formed in the coating auxiliary part. The coating auxiliary part is detachably connected with the bottom face of the base part, and the second through hole is located in the first through hole. The top face of the base component makes contact with the side, needing to be coated, of the coated product, and the second through hole is aligned with the coating position of the coated product. Due to the fact that the coating auxiliary component is detachably connected with the base component, the coating auxiliary component with the second through hole of the corresponding size can be replaced and used according to different grating waveguides, the same coating jig can conduct coating operation on grating areas of different grating waveguides, the universality of the coating jig is improved, and the manufacturing cost of the coating jig is reduced. The supporting part is arranged at the edge position of the bottom face of the base part, and it can be guaranteed that the base part can be used for installing a coating product in the horizontal state without being affected by the coating auxiliary part connected with the bottom face of the base part.

Description

Technical Field

[0001] The utility model belongs to the technical field of film coating, and in particular relates to an improved film coating fixture. Background Art

[0002] With the advent of the Internet+ and big data 5G era, the popularization of the metaverse concept, wearable devices, smart homes, education and teaching and other fields have developed rapidly, bringing development opportunities for augmented reality (AR) technology.

[0003] AR products are regarded as the next epoch-making terminal devices after smartphones. Head-mounted, handheld, and spatial display are the three main types of AR products. Among them, AR glasses have attracted much attention due to their lightweight and convenient features. Optical waveguides are considered to be the must-have optical solution for consumer-grade AR glasses because of their lightness and high penetration of external light. Optical waveguides can generally be divided into two types: geometric waveguides and diffractive waveguides. Geometric waveguides are so-called array waveguides, which achieve image output and eye box expansion by stacking array reflectors. Diffractive waveguides are mainly grating waveguides manufactured using photolithography technology.

[0004] In order to improve the reflection and transmission properties of the grating waveguide, it is necessary to perform a coating operation on the grating area on the waveguide substrate.

[0005] The coating operation of the existing grating waveguide is generally: align the grating area on one side of the grating waveguide with the corresponding coating hole on the coating jig, then fix the coating jig on the coating equipment, and the coating equipment performs the coating operation on the grating area on the side of the grating waveguide through the coating holes on the coating jig.

[0006] Since the grating area sizes of different grating waveguide designs may be different, it is currently necessary to design a coating jig with coating holes of corresponding sizes for the grating areas on different grating waveguides, which makes the coating jig non-universal and increases the manufacturing cost of the coating jig. Utility Model Content

[0007] In order to overcome the defects of the prior art, the utility model provides an improved coating fixture.

[0008] The utility model is realized by the following technical solutions:

[0009] The utility model provides an improved coating fixture, comprising a base component, a coating auxiliary component and a supporting component;

[0010] The support component is arranged at an edge position of the bottom surface of the base component;

[0011] A first through hole is provided in the base component;

[0012] A second through hole is provided on the coating auxiliary component;

[0013] The coating auxiliary component is detachably connected to the bottom surface of the base component; the second through hole is located inside the first through hole;

[0014] The top surface of the base component contacts a side of the coated product that needs to be coated, and the second through hole is aligned with a coating position of the coated product.

[0015] Further, the base component includes a supporting base and a bottom plate;

[0016] The support component is arranged at an edge position of the bottom surface of the support base;

[0017] The top surface of the support base is provided with a mounting groove, and the bottom surface of the mounting groove is in contact with the side of the coated product required for coating;

[0018] The top surface of the bottom plate is detachably connected to the bottom surface of the support base, and the bottom surface of the bottom plate is detachably connected to the coating auxiliary component;

[0019] A third through hole is formed inside the bottom surface of the installation groove, the first through hole is formed inside the bottom plate, and the first through hole is located inside the third through hole.

[0020] Furthermore, a plurality of first fixing holes are provided at intervals on the edge of the bottom plate, and a plurality of second fixing holes are provided on the support base;

[0021] The top surface of the bottom plate and the bottom surface of the support base are detachably connected via the corresponding first fixing holes and the second fixing holes.

[0022] Furthermore, the side wall of the installation groove is provided with an extension area at a set position in a direction away from the third through hole, and an assembly hole is provided in the extension area.

[0023] Furthermore, a positioning protrusion is provided on the side wall of the extension area extending toward the third through hole.

[0024] Furthermore, part of the side wall of the installation groove extends outward to form a pick-up and placement groove, and the pick-up and placement groove is used to pick up and place the coated product on the coating fixture.

[0025] Furthermore, the coating auxiliary component adopts a coating auxiliary plate;

[0026] The coating auxiliary plate is provided with the second through hole;

[0027] The bottom surface of the bottom plate is provided with a clamping groove around the first through hole;

[0028] The side surface of the coating auxiliary plate is clamped in the clamping groove.

[0029] Furthermore, under the action of external force, the side surface of the coating auxiliary plate can slide in the clamping groove.

[0030] Further, the coating auxiliary component includes a fixing plate and a coating auxiliary plate;

[0031] The coating auxiliary plate is arranged on the inner side of the fixing plate;

[0032] The fixing plate is provided with a fourth through hole;

[0033] The coating auxiliary plate is provided with the second through hole;

[0034] The second through hole is located inside the fourth through hole;

[0035] The inner side of the fixing plate is detachably connected to the bottom surface of the bottom plate.

[0036] Furthermore,

[0037] A clamping protrusion is arranged on the inner side of the fixing plate around the fourth through hole;

[0038] The side surface of the coating auxiliary plate is clamped in the clamping protrusion.

[0039] Furthermore, under the action of external force, the side surface of the coating auxiliary plate can slide in the clamping protrusion.

[0040] Furthermore, a clamping groove is provided on the bottom surface of the bottom plate around the first through hole;

[0041] The clamping protrusion is arranged in the clamping groove;

[0042] A first connection hole is provided on the inner side of the fixing plate, and a second connection hole is provided on the bottom surface of the bottom plate;

[0043] The detachable connection between the fixing plate and the bottom surface of the bottom plate is achieved through the first connecting hole and the second connecting hole.

[0044] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0045] The utility model provides an improved coating jig, including a supporting component, a base component, and a coating auxiliary component. A first through hole is provided in the base component, and a second through hole is provided on the coating auxiliary component. The coating auxiliary component is detachably connected to the bottom surface of the base component, and the second through hole is located in the first through hole. The top surface of the base component contacts the side of the coating product required for coating, and the second through hole is aligned with the coating position of the coating product. Since the coating auxiliary component is detachably connected to the base component, the coating auxiliary component with the second through hole of the corresponding size can be replaced for different grating waveguides, so that the same coating jig can be used to perform coating operations on the grating areas of different grating waveguides, thereby improving the versatility of the coating jig and reducing the manufacturing cost of the coating jig. A supporting component is provided at the edge position of the bottom surface of the base component, which can ensure that the base component can install the coating product in a horizontal state without being affected by the coating auxiliary component connected to the bottom surface of the base component. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0047] Figure 1 It is a schematic diagram of the three-dimensional structure of the improved coating fixture of the utility model in the first position;

[0048] Figure 2 It is a schematic diagram of the three-dimensional structure of the improved coating fixture of the utility model in the second position;

[0049] Figure 3 A schematic diagram of a connection block provided for the improved coating fixture of the utility model;

[0050] Figure 4 It is a schematic diagram of the connection structure between the support base and the support component;

[0051] Figure 5 is a schematic diagram of the three-dimensional structure of the bottom plate in the first position;

[0052] Figure 6 is a schematic diagram of the three-dimensional structure of the bottom plate in the second orientation;

[0053] Figure 7 It is a schematic diagram of the three-dimensional structure of the coating auxiliary plate in the first position;

[0054] Figure 8 It is a schematic diagram of the third perspective structure of the coating auxiliary plate;

[0055] Fig. 9is a schematic diagram of the three-dimensional structure of the fixing plate in the first position;

[0056] Fig.10 is a schematic diagram of the three-dimensional structure of the fixing plate in the second orientation;

[0057] Fig.11 It is a schematic diagram of the assembly structure of the fixing plate and the coating auxiliary plate;

[0058] Fig.12 It is a schematic diagram of the assembly structure of the fixed plate, the coating auxiliary plate and the base plate.

[0059] Among them, 1-base component, 1-1-support base, 1-2-bottom plate, 2-coating auxiliary component, 2-1-coating auxiliary plate, 2-2-fixing plate, 3-support component, 4-first through hole, 5-second through hole, 6-installation groove, 7-third through hole, 8-first fixing hole, 9-second fixing hole, 10-assembly hole, 11-positioning protrusion, 12-pick-up groove, 13-clamping groove, 14-fourth through hole, 15-clamping protrusion, 16-first connecting hole, 17-second connecting hole, 18-connecting block. DETAILED DESCRIPTION

[0060] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0061] In this article, the terms "first", "second" and other similar words are not intended to imply any order, quantity and importance, but are only used to distinguish different elements. In this article, the terms "one", "an" and other similar words are not intended to indicate that there is only one of the things described, but rather indicate that the relevant description is only for one of the things described, and the things described may have one or more. In this article, the terms "comprise", "include" and other similar words are intended to indicate logical mutual relationships, and cannot be regarded as indicating spatial structural relationships. For example, "A includes B" is intended to indicate that B belongs to A logically, but does not indicate that B is located inside A spatially. In addition, the meanings of the terms "comprise", "include" and other similar words should be regarded as open, rather than closed. For example, "A includes B" is intended to indicate that B belongs to A, but B does not necessarily constitute the whole of A, and A may also include other elements such as C, D, and E.

[0062] In this document, the terms "embodiment", "present embodiment", "preferred embodiment" and "one embodiment" do not mean that the relevant description is only applicable to a specific embodiment, but rather that the description may also be applicable to one or more other embodiments. Those skilled in the art should understand that in this document, any description of a certain embodiment can be replaced, combined, or combined in other ways with the relevant description in one or more other embodiments, and the new embodiment generated by the replacement, combination, or combination in other ways is easily conceivable by those skilled in the art and belongs to the protection scope of the present utility model.

[0063] In the description herein, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0064] The utility model provides an improved coating fixture, such as Figure 1 as well as Figure 2 As shown, it includes a base component 1, a coating auxiliary component 2 and a supporting component 3.

[0065] A supporting part 3 is provided at an edge of the bottom surface of the base part 1 .

[0066] The base component 1 is provided with a first through hole, and the coating auxiliary component 2 is provided with a second through hole.

[0067] The coating auxiliary component 2 is detachably connected to the bottom end of the base component 1 .

[0068] The size of the second through hole is smaller than that of the first through hole, and the second through hole is arranged in the first through hole.

[0069] The top surface of the base component contacts the side of the coated product to be coated, and the second through hole is aligned with the coating position of the coated product. The coating material molecules generated by the coating equipment pass through the second through hole to coat the coating position of the coated product.

[0070] There is no specific limitation on the shapes of the first through hole and the second through hole, and those skilled in the art can set them according to actual needs. For example, the shape of the first through hole is rectangular, and the shape of the second through hole is circular.

[0071] Exemplarily, the coated product here may be a grating waveguide, and the coating position of the coated product may be a grating setting region (such as a coupling-in grating region) of the grating waveguide.

[0072] Since the coating auxiliary component is detachably connected to the base component, the coating auxiliary component with the second through hole of the corresponding size can be used for the coating position size of different coating products. Taking the coating product as an example of a grating waveguide, the coating auxiliary component with the second through hole of the corresponding size can be replaced for different grating waveguides, so that the same coating jig can be used for coating the grating area of ​​different grating waveguides, thereby improving the versatility of the coating jig and reducing the manufacturing cost of the coating jig.

[0073] The bottom surface of the base component is provided with a supporting component at an edge position, which can ensure that the base component can install the coated product (such as a grating waveguide) in a horizontal state without being affected by the coating auxiliary component connected to the bottom surface of the base component.

[0074] As a preferred embodiment, the aperture size of the second through hole of the coating auxiliary component gradually decreases along the extension direction close to the coating position of the coating product, so that the coating area after the coating material molecules pass through the second through hole can be controlled, ensuring that the coating material molecules are subjected to coating operation in the coating area of ​​the coating product. In addition, the second through hole of the coating auxiliary component extends outwardly by a certain thickness close to the coating position of the coating product, thereby ensuring that when the coating position of the coating product is aligned with the second through hole, the second through hole of the coating auxiliary component is as close to the coating position of the coating product as possible, further controlling the coating area after the coating material molecules pass through the second through hole, ensuring that the coating material molecules are subjected to coating operation in the coating area of ​​the coating product.

[0075] For example, the base component may include a support base 1-1 (eg Figure 4 As shown) and bottom plate 1-2 (as shown Figure 5 as well as Figure 6 shown).

[0076] Wherein, a support component is arranged at the edge of the bottom surface of the support base. Figure 4 The support base shown in the figure takes a rectangular support base as an example, and the bottom surface of the rectangular support base is respectively fixed with support components 3 at four vertex positions. The support component can be exemplarily a support plate.

[0077] like Figure 4 As shown, a mounting groove 6 is provided inside the top surface of the supporting base 1 - 1 , and the bottom surface of the mounting groove 6 contacts the side of the coated product that needs to be coated.

[0078] The top surface of the bottom plate is detachably connected to the bottom surface of the support base. For example, a plurality of first fixing holes 8 (such as Figure 5 as well as Figure 6 As shown), a plurality of second fixing holes 9 are provided on the support base 1-1 (as shown Figure 4As shown), the top surface of the bottom plate 1-2 is detachably connected to the bottom surface of the support base 1-1 through the corresponding first fixing holes 8 and second fixing holes 9.

[0079] A third through hole 7 is provided inside the bottom surface of the mounting groove 6 (such as Figure 4 As shown), the first through hole 4 is provided in the bottom plate 1-2 (as shown Figure 5 as well as Figure 6 As shown), the first through hole 4 is located inside the third through hole 7.

[0080] There is no specific limitation on the shape of the bottom plate. For example, the bottom plate may be a circular bottom plate.

[0081] There is no specific limitation on the shape of the third through hole. For example, the third through hole may be a circular through hole.

[0082] There is no specific limit on the number and shape of the first fixing holes and the second fixing holes, and those skilled in the art can set them as needed, as long as it can be ensured that when the bottom plate is rotated to a certain angle, the top surface of the bottom plate and the bottom surface of the support base can still be detachably connected through the corresponding first fixing holes and second fixing holes. As shown in the figure, four arc-shaped first fixing holes are spaced apart at the edge of the circular bottom plate, and a plurality of circular second fixing holes are spaced apart at the bottom surface of the mounting groove of the support base.

[0083] As a preferred embodiment, the groove shape and size of the above-mentioned installation groove are matched with the shape of the coated product, so that the coating position of the coated product and the second through hole in the coating fixture can be quickly aligned. For example, the coated product is a grating waveguide, and the grating waveguide to be coated is an incomplete circle (a circle with some edges as straight lines). Figure 4 As shown, the groove shape of the mounting groove 6 can be designed to be an incomplete circle (a circle with a partial edge being a straight line), and the size of the mounting groove corresponds to the grating waveguide to be coated.

[0084] In order to fix the assembly position of the coating fixture and the grating waveguide, the side wall of the mounting groove is provided with an extension area at a set position away from the third through hole, and an assembly hole is provided in the extension area. Figure 4 As shown, the linear position of the mounting groove 6 can be extended to a certain rectangular area outside, and an assembly hole 10 is set in the rectangular area, and the connecting block 18 (such as Figure 3 As shown) to achieve the position fixation of the grating waveguide and the coating fixture. Further preferably, the side wall of the extension area is extended to the direction close to the third through hole to set a positioning protrusion, and the groove shape of the above-mentioned installation groove is designed to be an incomplete circle (a circle with a part of the edge being a straight line), such as Figure 4As shown, taking the case where the straight position of the mounting groove 6 extends outward to a certain rectangular area as an example, a positioning protrusion 11 is provided by extending the local side wall of the rectangular area toward the third through hole 7. The positioning protrusion 11 can be used to fix the circular grating waveguide with the same diameter as the incomplete circle to the coating fixture. For example, a positioning notch can be provided on the circular grating waveguide, and the positioning notch and the positioning protrusion 11 can be used to engage and position the waveguide.

[0085] In order to facilitate the placement of the coated product on the coating fixture, a placement groove 12 (such as Figure 4 As shown in FIG. 1 , the pick-up and placement groove 12 is used to pick up and place the coated product on the coating fixture. The number of the pick-up and placement grooves may not only be one, but may also be multiple. There is no specific requirement for the shape of the pick-up and placement groove, and those skilled in the art may design it according to actual needs.

[0086] The coating auxiliary component is detachably connected to the bottom surface of the bottom plate.

[0087] Exemplarily, the coating auxiliary component adopts a coating auxiliary plate 2-1 (such as Figure 7 as well as Figure 8 As shown), a second through hole 5 is opened on the coating auxiliary plate 2-1.

[0088] The bottom surface of the bottom plate 1-2 is provided with a snap-in groove 13 (such as Figure 5 As shown), the side surface of the coating auxiliary plate is clamped in the clamping groove 13.

[0089] Under the action of external force, the side surface of the coating auxiliary plate can slide in the clamping groove.

[0090] The coating auxiliary plate is arranged to be able to slide in the snap-in groove on the bottom surface of the base plate, so that the relative position of the second through hole on the coating auxiliary plate to the first through hole in the base plate can be adjusted, and the coating position of the auxiliary coating product and the coincidence positioning of the second through hole can be performed without cutting the size of the coated product.

[0091] Exemplarily, the coating auxiliary component may also include a fixing plate 2-2 (such as Fig. 9 as well as Fig.10 As shown) and the coating auxiliary plate 2-1 (as shown Figure 7 as well as Figure 8 shown).

[0092] A fourth through hole is formed on the fixed plate, a second through hole is formed on the coating auxiliary plate, the coating auxiliary plate is arranged on the inner side of the fixed plate, and the second through hole is located inside the fourth through hole. Fig. 9 As shown), the side of the coating auxiliary plate 2-1 is clamped in the clamping protrusion 15, and the second through hole 5 of the coating auxiliary plate 2-1 is located in the fourth through hole 14 (as shown Fig.11 As shown), under the action of external force, the side of the coating auxiliary plate can slide in the clamping protrusion.

[0093] The inner side of the fixing plate is detachably connected to the bottom surface of the bottom plate. For example, taking the inner side of the fixing plate as an example, a clamping protrusion is provided around the fourth through hole, and the bottom surface of the bottom plate 1-2 is provided with a clamping groove 13 (such as Figure 5 As shown), the clamping protrusion 15 is arranged in the clamping groove 13; the inner side of the fixing plate 2-2 is provided with a first connecting hole 16 (as shown Fig. 9 as well as Fig.10 As shown), the bottom surface of the bottom plate 1-2 is provided with a second connection hole 17 (as shown Figure 5 The fixing plate 2-2 and the bottom surface of the bottom plate 1-2 are detachably connected through the first connecting hole 16 and the second connecting hole 17 (as shown in FIG. Fig.12 shown).

[0094] There is no specific limitation on the shape of the fourth through hole, and it is preferably consistent with the shape of the first through hole on the bottom plate.

[0095] The coating auxiliary component of this example uses the structure of the fixed plate, the coating auxiliary plate and the bottom plate to adjust the relative position of the second through hole on the coating auxiliary plate to the first through hole in the bottom plate, and assists the coating position of the coating product and the coincidence positioning operation of the second through hole without cutting the size of the coating product. Compared with the coating auxiliary component using a single coating auxiliary plate, the connection structure of the fixed plate and the bottom plate is used to ensure that the second through hole on the coating auxiliary plate will not move after positioning.

[0096] Taking the grating waveguide as an example of the coated product, the coating operation of the coupling-in grating region of the grating waveguide using the coating fixture of the utility model is described below:

[0097] 1. According to the required coated product and the coating position of the required coated product, a coating auxiliary component is selected accordingly, so that the aperture size of the second through hole of the coating auxiliary component corresponds to the size of the coating position of the required coated product.

[0098] 2. Assemble the coating jig, detachably connect the coating auxiliary component to the corresponding position of the bottom surface of the base plate, so that the second through hole of the coating auxiliary component is located at the corresponding position in the first through hole of the base plate, detachably connect the top surface of the base plate where the coating auxiliary component is set to the bottom surface of the supporting base (in a loosely connected state), and make the first through hole of the base plate located in the third through hole of the supporting base.

[0099] 3. Place the supporting parts of the coating fixture on the operating platform, and assemble the coating side of the required coating product on the top surface of the supporting base.

[0100] 4. Disconnect the connection between the bottom plate of the coating auxiliary component and the supporting base, and adjust the relative position of the coating position of the coating product and the second through hole on the coating auxiliary component by rotating the bottom plate until the coating position of the coating product is aligned with the second through hole on the coating auxiliary component.

[0101] 5. Fix the coating fixture on which the desired coating product is placed on the coating equipment, and the coating material molecules generated by the coating equipment are plated at the coating position of the desired coating product through the second through hole.

[0102] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the present invention to be approved.

Claims

1. An improved coating fixture, characterized in that: It includes a base component, a coating auxiliary component and a supporting component; The support component is arranged at an edge position of the bottom surface of the base component; A first through hole is provided in the base component; A second through hole is provided on the coating auxiliary component; The coating auxiliary component is detachably connected to the bottom surface of the base component; the second through hole is located inside the first through hole; The top surface of the base component contacts a side of the coated product that needs to be coated, and the second through hole is aligned with a coating position of the coated product.

2. The improved coating fixture according to claim 1, characterized in that: The base component includes a supporting base and a bottom plate; The support component is arranged at an edge position of the bottom surface of the support base; The top surface of the support base is provided with a mounting groove, and the bottom surface of the mounting groove is in contact with the side of the coated product required for coating; The top surface of the bottom plate is detachably connected to the bottom surface of the support base, and the bottom surface of the bottom plate is detachably connected to the coating auxiliary component; A third through hole is formed inside the bottom surface of the installation groove, the first through hole is formed inside the bottom plate, and the first through hole is located inside the third through hole.

3. The improved coating fixture according to claim 2, characterized in that: The edge of the bottom plate is provided with a plurality of first fixing holes at intervals, and the support base is provided with a plurality of second fixing holes; The top surface of the bottom plate and the bottom surface of the support base are detachably connected via the corresponding first fixing holes and the second fixing holes.

4. The improved coating fixture according to claim 2, characterized in that: The side wall of the installation groove is provided with an extension area at a set position in a direction away from the third through hole, and an assembly hole is provided in the extension area.

5. The improved coating fixture according to claim 4, characterized in that: A positioning protrusion is provided on the side wall of the extension area extending toward the third through hole.

6. The improved coating fixture according to claim 2, characterized in that: Part of the side wall of the installation groove extends outward to form a pick-up and placement groove, and the pick-up and placement groove is used to pick up and place the coated product on the coating fixture.

7. The improved coating fixture according to claim 2, characterized in that: The coating auxiliary component adopts a coating auxiliary plate; The coating auxiliary plate is provided with the second through hole; The bottom surface of the bottom plate is provided with a clamping groove around the first through hole; The side surface of the coating auxiliary plate is clamped in the clamping groove.

8. The improved coating fixture according to claim 7, characterized in that: Under the action of external force, the side surface of the coating auxiliary plate can slide in the clamping groove.

9. The improved coating fixture according to claim 2, characterized in that: The coating auxiliary component includes a fixing plate and a coating auxiliary plate; The coating auxiliary plate is arranged on the inner side of the fixing plate; The fixing plate is provided with a fourth through hole; The coating auxiliary plate is provided with the second through hole; The second through hole is located inside the fourth through hole; The inner side of the fixing plate is detachably connected to the bottom surface of the bottom plate.

10. The improved coating fixture according to claim 9, characterized in that: A clamping protrusion is arranged on the inner side of the fixing plate around the fourth through hole; The side surface of the coating auxiliary plate is clamped in the clamping protrusion.

11. The improved coating fixture according to claim 10, characterized in that: Under the action of external force, the side surface of the coating auxiliary plate can slide in the clamping protrusion.

12. The improved coating fixture according to claim 10, characterized in that: The bottom surface of the bottom plate is provided with a clamping groove around the first through hole; The clamping protrusion is arranged in the clamping groove; A first connection hole is provided on the inner side of the fixing plate, and a second connection hole is provided on the bottom surface of the bottom plate; The detachable connection between the fixing plate and the bottom surface of the bottom plate is achieved through the first connecting hole and the second connecting hole.

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