Contact angle test positioning tool

Abstract

The utility model relates to a contact angle testing and positioning jig, which comprises a base, a positioning strip and a rack, the base comprises a measuring area and an assembling part, the measuring area is adjacent to the assembling part, the rack is provided with a plurality of tooth grooves, the positioning strip is provided with a gear part, and one end of the positioning strip far away from the gear part is provided with at least one measuring and positioning hole. The positioning strip is connected with the rack in a meshed mode through the gear part and the tooth groove, the rack is arranged in the assembling part and can move in a reciprocating mode along the assembling part, and the positioning strip pops out of the measuring area from the assembling part or rebounds the assembling part from the measuring area in the reciprocating movement process of the rack. The contact angle testing and positioning jig is matched with a portable contact angle measuring instrument to measure a certain point of a sample, a certain point on the sample can be positioned by popping up the positioning strip, then the portable contact angle measuring instrument is installed above the contact angle testing and positioning jig, and the positioning strip returns to the original position. And the portable contact angle measuring instrument can accurately drop the dropping liquid to the position of a certain point on the sample.

Description

Technical Field

[0001] The utility model relates to the field of contact angle measurement, in particular to a contact angle test positioning fixture. Background Art

[0002] The contact angle meter is an instrument commonly used in the field of surface science and material research. It is used to measure the angle between a droplet at the gas-liquid interface and the solid-liquid interface. In the existing technology, contact angle meters are divided into tabletop and portable types. The tabletop contact angle meter can accurately test a certain point on the sample, while the portable contact angle meter cannot accurately test a certain point on the sample due to structural reasons, thus reducing the accuracy of the data measured by the portable contact angle meter. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a contact angle test positioning fixture.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: the utility model relates to a contact angle test positioning fixture, including a base, a positioning bar, and a rack. The base includes a measuring area and an assembly part. The measuring area is adjacent to the assembly part. The rack is provided with a plurality of tooth grooves. The positioning bar is provided with a gear part. The positioning bar is provided with at least one measuring positioning hole at an end away from the gear part. The positioning bar is meshed with the rack through the gear part and the tooth groove. The rack is provided in the assembly part and can reciprocate along the assembly part. During the reciprocating movement of the rack, the positioning bar pops out of the measurement area from the assembly part or rebounds from the measurement area to the assembly part.

[0005] Preferably, the assembly portion is provided with a positioning bar assembly groove and a rack assembly groove, the positioning bar assembly groove is adjacent to and connected with the measuring area, a connecting port is provided between the rack assembly groove and the positioning bar assembly groove, and the gear portion is meshedly connected with the tooth groove at the connecting port.

[0006] Preferably, the rack is installed in the rack assembly groove through a spring.

[0007] Preferably, the rack is provided with a button at one end away from the spring, and the button is located outside the rack assembly groove.

[0008] Preferably, the tooth grooves are vertically distributed along the length direction of the rack.

[0009] Preferably, a limit piece is provided on the outer wall of the rack, a limit slot is provided at the notch of the rack assembly slot, the limit piece matches the limit slot, and when the rack is installed in the rack assembly slot, the limit piece is embedded in the limit slot.

[0010] Preferably, the positioning bar further comprises a rod body, the rod body and the gear part are integrally formed, and at least one measurement positioning hole is provided at one end of the rod body away from the gear part.

[0011] Preferably, it also includes a rack top block, which is installed at the notch of the rack assembly groove.

[0012] Preferably, a cover plate is further included, and assembly platforms are provided on both sides of the positioning bar assembly groove, and the cover plate is installed on the assembly platforms on both sides of the positioning bar assembly groove.

[0013] Preferably, it further comprises a bearing, a bearing groove is provided at a position of the positioning strip assembly groove close to the connection port, the gear part is provided with a rotating shaft, and the rotating shaft is installed in the bearing groove in cooperation with the bearing.

[0014] The beneficial effect of the utility model is that the utility model relates to a contact angle test positioning fixture, which allows the positioning rod to pop out to the measurement area, and a certain point on the sample is positioned by measuring the positioning hole. After the positioning is completed, the positioning rod is rebounded to the positioning bar assembly groove, and the portable contact angle meter 2 is installed on the contact angle test positioning fixture and tested. The utility model makes up for the structural deficiencies of the existing portable contact angle meter. By positioning a certain point on the sample through the contact angle test positioning fixture, accurate positioning testing can be achieved, thereby improving the precision and accuracy of the portable contact angle meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of the contact angle test positioning fixture of the utility model.

[0016] Figure 2 It is an exploded schematic diagram of the contact angle test positioning fixture of the utility model.

[0017] Figure 3 It is another exploded schematic diagram of the contact angle test positioning fixture of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the base of the utility model.

[0019] Figure 5 It is a structural schematic diagram of the positioning strip of the utility model.

[0020] Figure 6 It is a structural schematic diagram of the rack of the utility model.

[0021] Figure 7 It is a schematic cross-sectional view of the structure when the positioning bar of the utility model is located in the positioning bar assembly groove.

[0022] Figure 8 It is a schematic cross-sectional structure diagram of the positioning bar of the utility model that pops out to the measuring area.

[0023] Fig. 9 The utility model is a structural schematic diagram of a portable contact angle measuring instrument installed on a contact angle test positioning fixture.

[0024] Fig.10 It is a schematic diagram of the position of a liquid drop when the contact angle test positioning fixture of the utility model is used.

[0025] Reference numerals

[0026] 1. Contact angle test positioning fixture; 11. Base; 111. Measuring area; 112. Assembly part; 1121. Positioning bar assembly groove; 1122. Rack assembly groove; 1123. Connecting port; 1124. Limiting card slot; 1125. Bearing slot; 1126. Assembly table; 12. Positioning bar; 121. Rod body; 122. Measuring positioning hole; 123. Gear part; 124. Rotating shaft; 13. Button; 131. Connecting block; 14. Rack top block; 15. Rack; 151. Tooth groove; 152. Button slot; 153. Limiting piece; 16. Cover plate; 17. Bearing; 18. Spring; 2. Portable contact angle meter; 3. Droplet. DETAILED DESCRIPTION

[0027] See also Figure 1-10 As shown, the utility model relates to a contact angle test positioning fixture 1, which is used to cooperate with a portable contact angle measuring instrument 2 to measure the angle between a droplet 3 at a gas-liquid interface and a solid-liquid interface, and comprises: a base 11 and a positioning bar 12, wherein the base 11 comprises a positioning measurement area 111 and an assembly area 112, wherein the positioning measurement area 111 is adjacent to the assembly area 112, wherein the positioning measurement area 111 has a test space for a product to be measured, wherein one end of the positioning bar 12 is installed at the assembly area 112, and the other end of the positioning bar 12 can swing within the positioning measurement area 111.

[0028] Furthermore, the assembly area 112 is provided with a positioning strip receiving groove 1121 and a rack assembly groove 1122, the positioning strip receiving groove 1121 is connected with the positioning measurement area 111, and a connecting port 1123 is provided between the rack assembly groove 1122 and the positioning strip receiving groove 1121, and the connecting port 1123 connects the rack assembly groove 1122 with the positioning strip receiving groove 1121. A limiting card groove 1124 is provided at the notch of the rack assembly groove 1122, and the limiting card groove 1124 is arranged along the direction of the rack assembly groove 1122. A bearing groove 1125 is provided at the position of the positioning strip receiving groove 1121 near the connecting port 1123, and assembly platforms 1126 are provided on both sides of the positioning strip receiving groove 1121, and the heights of the two assembly platforms 1126 are consistent.

[0029] In this embodiment, the contact angle test positioning fixture 1 also includes a button 13, a rack top block 14, a rack 15, a cover plate 16, a bearing 17 and a spring 18. The spring 18 and the rack 15 are sequentially installed in the rack assembly groove 1122, the rack top block 14 is installed at the notch of the rack assembly groove 1122, the button 13 passes through the rack top block 14 and enters the rack assembly groove 1122, and the button 13 abuts against the rack 15. The bearing 17 is arranged in the bearing groove 1125, one end of the positioning bar 12 is fixedly installed in the positioning bar receiving groove 1121 with the bearing 17, the positioning bar 12 and the rack 15 are meshed and connected through the connection port 1123, and the cover plate 16 is installed on the assembly table 1126 on both sides of the positioning bar receiving groove 1121.

[0030] More specifically, in this embodiment, the positioning bar 12 includes a rod body 121 and a gear portion 123, the rod body 121 and the gear portion 123 are integrally formed, and two measurement positioning holes 122 are provided at one end of the rod body 121 away from the gear portion 123. The gear portion 123 is provided with a rotating shaft 124, and the rotating shaft 124 is installed in a bearing groove 1125 in cooperation with the bearing 17.

[0031] In this embodiment, the rack 15 is in the shape of a round rod, and a plurality of gear grooves 151 are provided on the peripheral surface of the rack 15. The gear grooves 151 are vertically distributed along the length direction of the rack 15, and the gear grooves 151 are used to mesh with the gear part 123. A button groove 152 is provided at the center of one end of the rack 15, and the button 13 is provided with a connecting block 131, and the connecting block 131 can be embedded and installed in the button groove 152. A stopper 153 is provided on the outer wall of the end of the rack 15 provided with the button groove 152, and the stopper 153 is installed in the stopper slot 1124. The stopper 153 is used to fix the rack 15 in the rack assembly groove 1122 to prevent the rack 15 from rotating in the rack assembly groove 1122, which causes the gear groove 151 and the gear part 123 to be unable to mesh with each other.

[0032] The utility model first positions the sample by the contact angle test positioning fixture 1, and then installs the portable contact angle measuring instrument 2 for measurement. The specific operation steps are as follows: first, keep pressing the button 13 of the contact angle test positioning fixture 1, so that the button 13 pushes the rack 15 to move inside the rack assembly groove 1122, and the gear groove 151 of the rack 15 and the gear part 123 of the positioning bar 12 generate meshing movement, so that the positioning bar 12 pops out to the positioning measurement area 111. After the positioning bar 12 pops out to the positioning measurement area 111, the contact angle test positioning fixture 1 is placed on the sample, and the measurement positioning hole 122 on the positioning bar 12 is used to align the position, and then the button 13 is released to allow the rack 15 to be reset by the rebound force of the spring 18. The positioning bar 12 rebounds to the positioning bar receiving groove 1121 as the rack 15 is reset. At this time, the portable contact angle meter 2 is installed on the contact angle test positioning fixture 1. The portable contact angle meter 2 can drip the droplet 3 to the position aligned with the measurement positioning hole 122, thereby realizing the positioning function.

[0033] The utility model cooperates with a portable contact angle meter to measure a certain point of a sample. The utility model can locate a certain point on the sample by popping out a positioning bar, and then the portable contact angle meter is installed above the contact angle test positioning fixture, and the positioning bar is returned to its position. The portable contact angle meter can drop liquid accurately to the position of a certain point on the sample. The specific steps are as follows: the positioning bar 12 is popped out to the positioning measurement area 111, and a certain point on the sample is positioned by measuring the positioning hole 122. After the positioning is completed, the positioning rod rebounds to the positioning bar receiving groove 1121, and the portable contact angle meter 2 is installed on the contact angle test positioning fixture 1. The portable contact angle meter 2 can drip the droplet 3 to the position aligned with the measuring positioning hole 122, and perform a test on a certain point on the sample. The utility model makes up for the structural deficiencies of the existing portable contact angle meter 2. The contact angle test positioning fixture 1 can directly perform a positioning operation on a certain point on the sample, and can achieve precise positioning testing, thereby improving the precision and accuracy of the portable contact angle meter 2.

[0034] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A contact angle test positioning fixture, characterized in that: The invention comprises a base, a positioning bar and a rack, wherein the base comprises a measuring area and an assembly part, the measuring area is adjacent to the assembly part, the rack is provided with a plurality of tooth grooves, the positioning bar is provided with a gear part, and the positioning bar is provided with at least one measuring positioning hole at an end away from the gear part, the positioning bar is meshed and connected with the rack through the gear part and the tooth grooves, the rack is arranged in the assembly part and can reciprocate along the assembly part, and the positioning bar pops out of the assembly part from the measuring area or rebounds from the measuring area to the assembly part during the reciprocating movement of the rack.

2. A contact angle test positioning fixture according to claim 1, characterized in that: The assembly part is provided with a positioning bar assembly groove and a rack assembly groove, the positioning bar assembly groove is adjacent to and communicated with the measuring area, a connecting port is provided between the rack assembly groove and the positioning bar assembly groove, and the gear part is meshedly connected with the tooth groove at the connecting port.

3. A contact angle test positioning fixture according to claim 2, characterized in that: The rack is installed in the rack assembly groove through a spring.

4. A contact angle test positioning fixture according to claim 3, characterized in that: The rack is provided with a button at one end away from the spring, and the button is located outside the rack assembly groove.

5. The contact angle test positioning fixture according to claim 1, characterized in that: The tooth grooves are vertically distributed along the length direction of the rack.

6. A contact angle test positioning fixture according to claim 2, characterized in that: A limiting piece is provided on the outer wall of the rack, and a limiting slot is provided at the notch of the rack assembly slot. The limiting piece matches the limiting slot. When the rack is installed in the rack assembly slot, the limiting piece is embedded in the limiting slot.

7. The contact angle test positioning fixture according to claim 1, characterized in that: The positioning bar further comprises a rod body, the rod body and the gear part are integrally formed, and at least one measuring positioning hole is provided at one end of the rod body away from the gear part.

8. The contact angle test positioning fixture according to claim 2, characterized in that: It also includes a rack top block, which is installed at the notch of the rack assembly groove.

9. A contact angle test positioning fixture according to claim 2, characterized in that: It also includes a cover plate. Assembly platforms are provided on both sides of the positioning bar assembly groove, and the cover plate is installed on the assembly platforms on both sides of the positioning bar assembly groove.

10. A contact angle test positioning fixture according to claim 1, characterized in that: It also includes a bearing. A bearing groove is provided at a position of the positioning strip assembly groove close to the connecting port. The gear part is provided with a rotating shaft. The rotating shaft is installed in the bearing groove in cooperation with the bearing.

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