CN108680131B

CN108680131B - Dispensing test tool

Info

Publication number: CN108680131B
Application number: CN201810507267.8A
Authority: CN
Inventors: 贾玉虎
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-05-24
Filing date: 2018-05-24
Publication date: 2020-08-21
Anticipated expiration: 2038-05-24
Also published as: CN108680131A

Abstract

The application discloses test fixture is glued to point includes: test fixture, test piece, apron, adhesive layer and impeller. The test block is provided with a first through hole and a groove body, the groove body extends along the circumferential direction of the first through hole and is spaced from the first through hole, the groove body divides the first surface into a first part and a second part, the first part is located on the radial inner side of the groove body, the second part is located on the radial outer side of the groove body, the part, close to the periphery of the first surface, of the second part is in contact with the test fixture, and the thickness of the first part is smaller than that of the second part. The cover plate covers the first through hole and the groove body, and the edge of the cover plate is opposite to the second part. The adhesive layer is positioned between the cover plate and the first part, and the pushing piece penetrates through the first through hole and is suitable for pushing the cover plate. According to the point test fixture that glues of this application embodiment, through setting up the test piece, can simulate the point thickness of gluing and glue the width, simple structure, convenient operation and measuring accuracy height have very strong practicality.

Description

Dispensing test tool

Technical Field

The application relates to a point and glues test technical field, particularly, especially relate to a point and glue test fixture.

Background

The dispensing process has the advantages of simple operation, low cost, realization of automatic operation and the like, and is widely applied to the assembly of products such as electronic products, toys and the like. However, in the dispensing process, the dispensing amount of the dispensing is not easy to be grasped, and the dispensing strength is not enough and the dispensing amount is too large.

In the related art, a method for testing the strength of glue is provided, but the method can only test the performance of the glue simply, cannot test the connection strength between the glue and a connecting piece connected with the glue accurately, and has a great limitation.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a dispensing test tool, which has the advantages of convenience in operation and accurate test result.

According to some glue test fixture of this application embodiment, include: testing the clamp; the testing fixture comprises a testing block, a first clamping piece and a second clamping piece, wherein the testing block is provided with a first surface and a second surface which are opposite, the testing block is provided with a first through hole and a groove body, the first through hole penetrates through the first surface and the second surface, the groove body is positioned on the first surface, the groove body extends along the circumferential direction of the first through hole and is spaced from the first through hole, the groove body divides the testing block into a first part and a second part, the first part is positioned on the radial inner side of the groove body, the second part is positioned on the radial outer side of the groove body, the part of the second part, which is close to the periphery of the first surface, is in contact with the testing fixture, and the thickness of the first part is smaller than that of the second part; the cover plate is positioned on one side of the test block and is close to the first surface, the cover plate covers the first through hole and the groove body, and the edge of the cover plate is opposite to the second part; an adhesive layer between the cover sheet and the first portion; the pushing piece penetrates through the first through hole and is suitable for pushing the cover plate.

According to the point of gluing test fixture of this application embodiment, through setting up the test piece, the width of the first portion on the test piece can simulate actual point and glue the width, and the thickness difference between the first portion on the test piece and the second portion can simulate actual point and glue thickness, and the operation is more convenient and can the adhesive strength of accurate test adhesive layer to can select suitable point and glue width and point and glue thickness and in order to promote the sound construction performance of gluing the product.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an overall structural view of a dispensing test fixture according to an embodiment of the present application;

FIG. 2 is a full sectional view of a dispensing test fixture according to an embodiment of the application;

FIG. 3 is an enlarged view of a portion circled by A in FIG. 2;

FIG. 4 is an exploded view of a dispensing test fixture according to an embodiment of the present application;

FIG. 5 is an exploded view of a dispensing test fixture according to an embodiment of the present application from another perspective;

FIG. 6 is a schematic diagram of the overall structure of a test block according to an embodiment of the present application;

FIG. 7 is a side view of a test block according to an embodiment of the present application;

FIG. 8 is a schematic diagram of the overall structure of a test fixture according to an embodiment of the present application;

FIG. 9 is a block diagram of a test fixture from another perspective view according to an embodiment of the present application.

Reference numerals:

the dispensing test fixture 100 is provided with a plurality of dispensing units,

a test jig 1, a second through hole 11, a step 12,

the test block 2 is provided with a test block,

a first surface 21, a first portion 21a, a second portion 21b, a second surface 22, a first through hole 23, a groove 24,

the cover plate 3, the ink layer 31,

the adhesive layer (4) is provided with an adhesive layer,

a pusher member 5.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "thickness," "radial," "circumferential," and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings for convenience in describing the present application and simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The dispensing test tool 100 according to the embodiment of the present application will be described with reference to fig. 1 to 9, and the dispensing test tool 100 can test the dispensing strength.

As shown in fig. 1-2 and 4-5, a dispensing test tool 100 according to an embodiment of the present application includes: the test fixture comprises a test fixture 1, a test block 2, a cover plate 3, an adhesive layer 4 and a pushing piece 5.

As shown in fig. 4 to 7, the test block 2 may have a first surface 21 and a second surface 22 opposite to each other, the test block 2 may have a first through-hole 23 and a groove 24, and the first through-hole 23 may extend in a thickness direction of the test block 2 to penetrate the first surface 21 and the second surface 22. The groove 24 may be located on the first surface 21, the groove 24 may extend in a circumferential direction of the first through hole 23, the groove 24 may be disposed at an interval from the first through hole 23, the groove 24 may divide the test block 2 into a first portion 21a and a second portion 21b, the first portion 21a may be located at a radially inner side of the groove 24, the second portion 21b may be located at a radially outer side of the groove 24, a portion of the second portion 21b near a periphery of the first surface 21 may contact the test fixture 1, and a thickness of the first portion 21a may be smaller than a thickness of the second portion 21 b.

Optionally, the first through hole 23 may be a circular hole or a polygonal hole, and may be selectively arranged according to actual use requirements, which is not specifically limited in this application.

As shown in fig. 4-5, the cover plate 3 may be disposed on one side of the test block 2 and close to the first surface 21, the cover plate 3 may cover the first through hole 23 and the groove 24, and an edge of the cover plate 3 may be opposite to the second portion 21 b. As shown in fig. 2, the adhesive layer 4 may be located between the cover plate 3 and the first portion 21 a. The pushing member 5 may be disposed through the first through hole 23 and adapted to push the cover plate 3.

Specifically, when the dispensing test fixture 100 works, dispensing may be performed on the first portion 21a, and the width of the first portion 21a is the dispensing width. When the cover plate 3 covers and covers the first through hole 23 and the slot 24, as shown in fig. 7, since the thickness of the first portion 21a may be smaller than that of the second portion 21b, the thickness difference d between the first portion 21a and the second portion 21b may define the dispensing height, and the excess glue may enter the slot 24 under the pressure of the cover plate 3. After the glue has set, an adhesive layer 4 may be formed between the cover plate 3 and the first portion 21a, which adhesive layer 4 may connect the cover plate 3 and the test block 2 together. When the bonding strength of the adhesive layer 4 is tested, the assembly of the test block 2 and the cover plate 3 can be placed on the test fixture 1, the pushing piece 5 penetrates through the first through hole 23 and can apply pushing force to the cover plate 3, and the bonding strength of the adhesive layer 4 can be verified according to the pushing force of the pushing piece 5 for pushing the test block 2 and the cover plate 3 away.

Optionally, the test blocks 2 may be set to different models, widths of the first portions 21a on the test blocks 2 of different models may be different, and a thickness difference d between the first portions 21a and the second portions 21b on the test blocks 2 of different models may also be different, so that the corresponding test block 2 may be selected according to an actual dispensing width and dispensing thickness, and thus, the bonding strength of the adhesive layers 4 of different models may be conveniently tested.

In a specific example of the application, the dispensing test tool 100 may further include a loading device, the loading device may be connected to the pushing member 5, and the loading device may apply a load to the pushing member 5, so that the pushing member 5 may apply a pushing force to the cover plate 3. The loading device can control the load applied to the pushing member 5, can also control the speed of the pushing member 5 for applying thrust, and can uniformly apply a load with a certain size to the cover plate 3 through the pushing member 5, so that the operation of the dispensing test tool 100 can be improved to be more stable, and the test effect of the dispensing test tool 100 can also be improved.

It is understood that the dispensing test tool 100 can simulate dispensing and bonding environments during product assembly. For example, the dispensing product may be a mobile phone, the composition material of the testing block 2 may be the same as that of the middle frame of the mobile phone, the composition material of the cover plate 3 may be the same as that of the glass cover plate of the mobile phone, and the bonding strength between the middle frame of the mobile phone and the glass cover plate may be simulated by testing the bonding strength between the testing block 2 and the cover plate 3. The width of the first portion 21a may be the same as the dispensing width of the middle frame of the mobile phone, and the thickness difference d between the first portion 21a and the second portion 21b may be the same as the dispensing thickness of the middle frame of the mobile phone. Therefore, the adhesive dispensing test tool 100 can accurately test the bonding strength between the middle frame and the glass cover plate of the mobile phone. Further, whether the dispensing width and the dispensing thickness meet the use requirements or not can be verified through the dispensing test tool 100 according to the requirement of the bonding strength between the middle frame and the glass cover plate of the mobile phone, and therefore the appropriate dispensing width and the dispensing thickness can be obtained.

It should be noted that the dispensing product is not limited to a mobile phone, but also can be other electronic products, toy products, etc., and the dispensing test tool 100 can be used to test the dispensing bonding strength according to actual use requirements, and suitable dispensing parameters can be selected through the test of the dispensing test tool 100, which is not specifically limited in this application.

According to the dispensing test tool 100 of the embodiment of the application, by arranging the test block 2, the width of the first part 21a on the test block 2 can simulate the actual dispensing width, the thickness difference d between the first part 21a and the second part 21b on the test block 2 can simulate the actual dispensing thickness, the operation is more convenient, and the bonding strength of the adhesive layer 4 can be accurately tested, so that the proper dispensing width and the dispensing thickness can be selected to improve the structural firmness of the dispensing product.

As shown in fig. 8-9, according to some embodiments of the present disclosure, the test fixture 1 may have a second through hole 11, an inner wall of the second through hole 11 may have a step 12, and the test block 2 overlaps the step 12, so that the structure of the test fixture 1 may be simpler and the pushing force applied by the pushing member 5 to the cover plate 3 may be facilitated. Specifically, when the dispensing test fixture 100 works, the test fixture 1 may be fixed, and the test block 2 may be placed on the step 12. When the pushing piece 5 applies pushing force to the cover plate 3, the step 12 can prevent the test block 2 from moving relative to the test fixture 1, so that the test precision of the dispensing test tool 100 can be improved.

Optionally, the test fixture 1 may be provided with a plurality of steps 12, and the plurality of steps 12 may be uniformly distributed in the circumferential direction of the second through hole 11 at intervals, so as to improve the fitting firmness of the test block 2 and the test fixture 1. For example, in the specific example shown in fig. 8, the test jig 1 is formed in a square shape, and the second through hole 11 is formed in a square shape and penetrates the test jig 1 in the thickness direction of the test jig 1. Four steps 12 are arranged on the test fixture 1, and the four steps 12 are uniformly distributed around the second through hole 11 at intervals. Of course, the design form of the test fixture 1 is not limited to this, for example, the test fixture 1 may also be formed in a cylindrical shape, and may be selectively arranged according to the actual use requirement, and the present application is not particularly limited thereto.

As shown in fig. 1, in some embodiments of the present application, the second surface 22 may be flush with a portion of the outer surface of the test fixture 1, so that the overall structure of the spot-filling test fixture 100 may be more consistent. It will of course be appreciated that the second surface 22 may not be flush with part of the outer surface of the test fixture 1. For example, the second surface 22 may be located inside the second through hole 11, and the second surface 22 may also extend out of the second through hole 11 as long as the structural rigidity requirement of the dispensing test fixture 100 can be met.

As shown in fig. 6, in some embodiments of the present application, the test block 2 may be formed in a cylindrical shape, whereby the structure of the test block 2 may be made simpler. In some specific examples of the present application, the test block 2 is formed in a cylindrical shape, and the first through hole 23 is formed in a circular hole, so that the overall structure of the test block 2 can be more harmonious and more aesthetically pleasing. Note that the shape of the test block 2 is not limited to this. For example, the test block 2 may also be formed in a polyhedral shape.

As shown in fig. 6, in some embodiments of the present application, the slot body 24 may be formed as an annular groove, thereby making the structure of the slot body 24 simpler and easier to machine. Alternatively, the groove body 24 may be formed as a circular groove, whereby the aesthetic appearance of the test block 2 may be improved. Optionally, a CNC machining mode can be adopted to machine the annular groove body 24 on the test block 2, so that the operation is convenient and the machining precision is high. It is of course understood that the shape of the channel 24 is not limited thereto, and for example, the channel 24 may also be formed in a polygonal shape.

The test block 2 of the present embodiment is described in detail below with reference to fig. 6 to 7.

As shown in fig. 6 to 7, the test block 2 may be formed in a disk shape, with the first surface 21 and the second surface 22 being disposed opposite to each other in the thickness direction of the test block 2. The first through-hole 23 is located at the center position of the test block 2 and penetrates the first surface 21 and the second surface 22 in the thickness direction of the test block 2. A groove 24 is provided on the first surface 21, the groove 24 is recessed in the thickness direction of the test block 2 with respect to the first surface 21, and the groove 24 is provided around the first through hole 23 and formed in a circular ring shape. The channel 24 divides the first surface 21 into a first portion 21a and a second portion 21b, the second portion 21b having a thickness greater than the thickness of the first portion 21 a.

According to some embodiments of the present disclosure, the bottom surface of the channel 24 may be planar, thereby facilitating the machining of the channel 24. Of course, the bottom surface of the groove 24 may also be an arc surface or a stepped surface as long as the requirement of storing glue can be met.

In some embodiments of the present disclosure, the testing block 2 may be a plastic piece, so that the processing cost of the dispensing testing tool 100 may be saved. The plastic material has low price, convenient processing and strong practicability. Optionally, the test block 2 may also be a metal material, and may be selectively set according to the requirement of the dispensing test fixture 100.

As shown in fig. 4, according to some embodiments of the present disclosure, a surface of the cover plate 3 facing the test block 2 may be coated with an ink layer 31, so that the bonding strength of the adhesive layer 4 may be improved. Specifically, when the cover plate 3 is placed on the test block 2, the glue on the first portion 21a can chemically react with the ink layer 31, and the product can firmly connect the cover plate 3 and the test block 2.

Optionally, the thickness of the ink layer 31 may be 15-30um, so as to meet the requirement of connecting the cover plate 3 and the test block 2. It will be appreciated that when the thickness of the ink layer 31 is small, the strength of the connection of the cover plate 3 to the test block 2 is greatly affected, thereby reducing the adhesive strength of the adhesive layer 4. When the thickness of the ink layer 31 is large, although the requirement of the bonding strength can be satisfied, the test cost is increased. Multiple tests of the inventor prove that when the thickness of the ink layer 31 is 15-30um, the thickness of the ink layer 31 can meet the requirement of bonding strength and can also save the use amount of the ink. Further, the thickness of the ink layer 31 may be 20 um.

In some embodiments of the present application, the adhesive layer 4 may be a hot melt adhesive or an optical adhesive, so that the adhesive strength of the adhesive layer 4 can be improved. The hot melt adhesive has the advantages of no toxicity, no odor, no pollution, high bonding strength and high bonding speed, and can greatly improve the bonding strength of the adhesive layer 4. The optical cement can meet the bonding requirement, has a light-transmitting function, and can be bonded by adopting the optical cement when the transmittance requirement of a dispensing product is higher.

In a specific example of the present application, different types of ink layers 31 may be disposed on the cover plate 3, and the dispensing test fixture 100 may test the bonding strength between the different types of ink layers 31 and the glue, so that the type of the ink layer 31 with the largest bonding strength may be selected. Of course, different types of glues may be disposed on the first portion 21a, and the glue dispensing test tool 100 may test the bonding strength between the different types of glues and the ink layer 31, so that the type of glue with the largest corresponding bonding strength may be selected. Therefore, through the arrangement, a better combination of the glue and the ink layer 31 can be obtained by adopting a single-factor variable test method, so that the bonding strength of the adhesive layer 4 can be improved, and the structural strength of a dispensing product can be further improved.

As shown in fig. 1, 4-5, according to some embodiments of the present application, the pusher member 5 may have a cylindrical shape, thereby making the overall structure of the pusher member 5 simpler. Alternatively, the pushing member 5 may be fitted to the first through hole 23. For example, the pusher 5 may be formed in a cylindrical shape, and the first through-hole 23 may be formed in a circular hole; the pusher 5 may be formed in a rectangular parallelepiped shape, and the first through-hole 23 may be formed as a square hole. Thus, the arrangement described above makes it possible to further coordinate the engagement structure of the pusher 5 and the first through hole 23. It will be appreciated that the form of cooperation of the urging member 5 and the first through-hole 23 is not limited thereto. For example, the pushing member 5 may also be formed in a cylindrical shape, and the first through hole 23 may be formed in a square hole, so that the testing requirement of the dispensing test tool 100 may also be met.

The dispensing test tool 100 and the testing method thereof according to the embodiment of the present application are described in detail below with reference to fig. 1 to 9, and it should be understood that the following description is only exemplary and not intended to limit the present application.

As shown in fig. 1-2 and 4-5, a dispensing test tool 100 according to an embodiment of the present application includes: the test fixture comprises a test fixture 1, a plurality of test blocks 2, a cover plate 3, an adhesive layer 4 and a pushing piece 5.

As shown in fig. 7 to 8, the test fixture 1 is formed in a square shape, a second through hole 11 having a square shape is formed at a center position of the test fixture 1, the second through hole 11 penetrates through the test fixture 1 in a thickness direction of the test fixture 1, four steps 12 are formed on the test fixture 1, and the four steps 12 are uniformly spaced around the second through hole 11.

As shown in fig. 6, each test block 2 is formed in a circular disk shape, and the first surface 21 and the second surface 22 are arranged to face away from each other in the thickness direction of the test block 2. The first through-hole 23 is located at the center position of the test block 2 and penetrates the first surface 21 and the second surface 22 in the thickness direction of the test block 2. A groove 24 is provided on the first surface 21, the groove 24 is recessed in the thickness direction of the test block 2 with respect to the first surface 21, and the groove 24 is provided around the first through hole 23 and formed in a circular ring shape. The channel 24 divides the first surface 21 into a first portion 21a and a second portion 21b, the first portion 21a having a thickness less than the thickness of the second portion 21 b. When the dispensing test fixture 100 works, the width of the first portion 21a is the dispensing width, and the thickness difference d between the first portion 21a and the second portion 21b is the dispensing thickness. A portion of the second portion 21b near the periphery of the first surface 21 contacts the test fixture 1, and the test fixture 1 may function to fix the test block 2. The thickness difference d between the first portion 21a and the second portion 21b of the plurality of test blocks 2 is different, and the width of the first portion 21a of the plurality of test blocks 2 is also different.

As shown in fig. 4, the cover plate 3 is formed in a square shape, an ink layer 31 is provided on a surface of the cover plate 3 on a side close to the test block 2, and the thickness of the ink layer 31 is 20 um.

The test method according to the embodiment of the application comprises the following steps:

firstly, different types of ink layers 31 are arranged on the cover plate 3, the glue is selected from hot melt glue, and the glue dispensing test tool 100 can test the bonding strength between the different types of ink layers 31 and the glue, so that the type of the ink layer 31 with the maximum corresponding bonding strength can be selected.

Then, the combination of the ink layer 31 and the glue is adopted, one of the test blocks 2 is selected and the glue is dispensed on the first portion 21a, the cover plate 3 is placed on the test block 2, the glue is dispensed between the cover plate 3 and the first portion 21a to construct the adhesive layer 4, the thickness of the adhesive layer 4 is the same as the thickness difference d between the first portion 21a and the second portion 21b, and the width of the adhesive layer 4 is the same as the width of the first portion 21 a. And after the adhesive layer 4 is solidified, placing the assembly of the cover plate 3 and the test block 2 on the test fixture 1, wherein the pushing piece 5 penetrates through the first through hole 23 and abuts against one side surface of the cover plate 3, the loading device can slowly apply load to the pushing piece 5, and when the cover plate 3 is separated from the test block 2, the loading force displayed on the loading device is recorded.

And finally, judging the bonding strength of the adhesive layer 4 according to the loading force when the cover plate 3 is separated from the test block 2, selecting the test blocks 2 of different models to adjust the width and thickness of the adhesive layer 4, and repeating the operation to select the proper width and thickness of the adhesive layer 4.

Therefore, by means of the arrangement, the combination of the width and the thickness of the proper glue, the ink layer 31 and the adhesive layer 4 can be obtained by adopting a single-factor variable test method, the bonding strength of the adhesive layer 4 can be improved, and the structural strength of a dispensing product can be improved.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a test fixture is glued to point which characterized in that includes:

testing the clamp;

the testing fixture comprises a testing block, a first clamping piece and a second clamping piece, wherein the testing block is provided with a first surface and a second surface which are opposite, the testing block is provided with a first through hole and a groove body, the first through hole penetrates through the first surface and the second surface, the groove body is positioned on the first surface, the groove body extends along the circumferential direction of the first through hole and is spaced from the first through hole, the groove body divides the testing block into a first part and a second part, the first part is positioned on the radial inner side of the groove body, the second part is positioned on the radial outer side of the groove body, the part of the second part, which is close to the periphery of the first surface, is in contact with the testing fixture, and the thickness of the first part is smaller than that of the second part;

the cover plate is positioned on one side of the test block and is close to the first surface, the cover plate covers the first through hole and the groove body, and the edge of the cover plate is opposite to the second part;

the adhesive layer is positioned between the cover plate and the first part, the thickness difference between the first part and the second part is the thickness of the adhesive layer, and the width of the first part is the width of the adhesive layer;

and the pushing piece penetrates through the first through hole and is suitable for pushing the cover plate, and the bonding strength of the adhesive layer is tested according to the pushing force of pushing the testing block and the cover plate by the pushing piece.

2. The dispensing test fixture of claim 1, wherein the test fixture has a second through hole, the inner wall of the second through hole has a step, and the test block is lapped on the step.

3. The dispensing test fixture of claim 1, wherein the second surface is flush with a portion of an outer surface of the test fixture.

4. The dispensing test fixture of claim 1, wherein the test block is cylindrical.

5. The dispensing test fixture of claim 1, wherein the slot is an annular slot.

6. The dispensing test fixture of claim 5, wherein the slot is an annular slot.

7. The dispensing test fixture of claim 1, wherein the bottom surface of the slot is planar.

8. The dispensing test fixture of claim 1, wherein the test block is a plastic piece.

9. The dispensing test fixture of claim 1, wherein a surface of the cover plate facing the test block is coated with an ink layer.

10. The dispensing test fixture of claim 9, wherein the ink layer has a thickness of 15-30 um.

11. The dispensing test fixture of claim 1, wherein the adhesive layer is a hot melt adhesive or an optical adhesive.

12. The dispensing test fixture of claim 1, wherein the pusher is cylindrical.